 DRILLING METHOD COMPRISING A TRAIN MEASUREMENT (S), AND CORRESPONDING DRILLING DEVICE
专利摘要:
The invention relates to a method of drilling an element to be pierced by means of a drilling device and a cutting tool comprising listels and cutting edges, said method comprising a step of determining at least one load value representative of the overall drag due to the internal friction of said piercing device and the friction of said listels in said element to be pierced, this step comprising the following substeps: stopping of said piercing operation; - recoil of said cutting tool over a predetermined distance; - Driving said cutting tool with predetermined cutting parameters; measuring at least one load value during the driving of said cutting tool with said cutting parameters before its cutting edges come into contact again with said element to be pierced, and after stabilization of said load values, said at least one measured load value being representative of said overall drag. 公开号:FR3058342A1 申请号:FR1660715 申请日:2016-11-04 公开日:2018-05-11 发明作者:Sebastien Pereira 申请人:Seti Tec SAS； IPC主号:
专利说明:
î. Field of the invention The field of the invention is that of drilling techniques, in particular of multilayer elements, that is to say comprising a stack of several layers of different materials. The invention relates in particular to the drilling methods as well as the devices implemented for this purpose. 2. Prior art Multilayer materials are more and more commonly used, in particular in the aeronautical field, to manufacture aircraft. These multilayer materials consist of a plurality of successive stacked layers made of different materials. Among the materials used in the composition of these multilayer materials are notably aluminum alloys, titanium alloys, laminated carbon fiber, GLARE (for “Glass Laminate Aluminum Reinforced Epoxy” in English), steel stainless, Inconel ... In the aeronautical industry, these multilayer materials are often drilled using: manual drills during the implementation of which the thrust on the drill is generated manually; drills during the implementation of which the advance of the drill is motorized, their body being fixed to a support during drilling and moved manually by an operator from one drilling point to another; These drills include: automatic feed drills for which the feed speed and frequency of rotation of the drill are dependent, and drills with controlled cutting parameters for which the feed speed and frequency of rotation of the drill can vary independently the other ; drilling robots, similar to machine tools, during the implementation of which, the frequency of rotation and the speed of advance of the drill can be controlled independently of each other as for drills with parameters controlled cutting. The present invention is more particularly intended to be implemented in the context of drills with controlled cutting parameters and drilling robots. Such drilling devices, also called drilling devices with controlled cutting parameters, are connected to a control unit containing in particular the drilling program, that is to say all the information enabling a drilling strategy to be implemented. automatically. Such drilling devices conventionally comprise a casing, housing a feed motor and a rotation motor, at the end of which extends a spindle intended to drive a cutting tool like a drill, the motors being connected to the spindle via transmission. These drilling devices make it possible to ensure the drilling of an element to be drilled during a drilling operation which conventionally comprises a phase of approaching the drill in the direction of the element to be drilled, a phase of centering the drill, a drilling phase proper with cutting parameters adapted to the material (s) encountered, a phase of exit from the drill bit of the part to be drilled and then withdrawal. With reference to FIG. 3, the point of a drill 13 conventionally comprises a central edge 130 extended laterally by main edges 131 which end with cutting nozzles 132. The cutting nozzles 132 are extended by strips 133 which extend helically and define the diameter of the drill. The surface which extends between the central edge 130 and the cutting tips 132, comprises the end point 134 of the drill, defines the cone of the drill which has a height H. The function of the drill is to cut the material along a path defined by the cutting parameters (in particular speed of rotation, feed per revolution with possibly an alternative component). The materials present different piercing difficulties given their differences in resilience, adhesion and abrasiveness. This requires the use of cutting parameters specific to each material to obtain: controlled quality; optimum deliverability; acceptable drill wear. Measuring and monitoring the load on the drill (torque or thrust force along the drilling axis) during a drilling operation can contribute to controlling the quality of drilling and managing wear of the forest. Indeed, for given cutting parameters, the load on the drill increases with the wear of the drill, its monitoring then making it possible to replace the drill when the load becomes too high, which translates that the drill is worn. Furthermore, it is possible, during a drilling operation, to detect a change in material, to identify the material newly encountered by the drill, and to adapt the cutting parameters accordingly, this on the basis of '' load monitoring on the drill. Such a technique is based, when the drill drills a given material with given cutting parameters specific to this material (these parameters are called "material cutting parameters"), on a comparison of the load values to which the drill is subjected with intervals of predetermined load value specific to this material drilled by a given type of drill and its cutting parameters. When said load values leave the predetermined interval of the material supposed to be being drilled, then a new material has been encountered by the drill. It is then possible to identify the new material being drilled by applying identical cutting parameters for each of the materials in the group of materials making up the part to be drilled with a given drill bit (these cutting parameters are called "cutting parameters of "), and comparing the load values on the drill with predetermined reference intervals. These reference intervals are predetermined in the laboratory for each material drilled with the reference cutting parameters and a drill similar to that used. The new material identified is the one whose load value interval contains the load value measured during drilling with the reference parameters. The reference cutting parameters are, for a given group of materials, the binding cutting parameters based on the values of cutting speed and feed rate of the material (s) of the group imposing minimum or maximum limit values, below or, above which a major drawback appears, such as premature wear of the cutting edges of the drill. A load value on the drill can be: measuring a torque sensor placed on the transmission between the drill rotation motor, and the drill, translating the torque applied to the drill; the measurement of a force sensor placed on the spindle reflecting the axial thrust on the drill; measuring the power or intensity consumed by the drill's rotation motor, reflecting the torque applied to the drill (taking into account the transmission ratio in the case of a two-speed drill; the measurement of the power or intensity consumed by the advance motor of the drill, reflecting the thrust applied to the drill. This process therefore exploits the fact that each type of material will generate the edges of the drill, subject to given reference cutting parameters, different forces between the different types of material. For this process to be effective, the load values obtained during the application of the reference cutting parameters must therefore be: repeatable with low dispersion for the same material and the same drill, in other words the predetermined load value intervals are narrow; between the different types of material. The more these intervals are distinct and repeatable, the lower the risk of confusing two different materials in the method of determining the material encountered by a drill, and therefore the more reliable the method. One way of making these load values between the different materials distinct is to choose the strongest reference parameters (feed or cutting speed) within the allowable limit of the constraining parameters. The higher the reference parameters, the greater the efforts on the drill, and the greater the differences in load values between the different materials. However, monitoring the load on the drill, both in order to assess the wear of the drill and to identify the material being drilled, can be made difficult by the existence of parasitic phenomena having an impact. on the load of the drill. When drilling a hole, certain phenomena can be such as to accentuate the friction of the strips on the walls of the hole being drilled, among others: certain materials can, during drilling, slightly deform in their elastic limit under the cutting forces of the drill and after drilling tighten in diameter on the drill: this phenomenon is sometimes encountered in titanium alloys and carbon fiber; sometimes the point of the drill bit can chase slightly when it is centered on the entry face of the borehole: this is likely to cause an offset of the drill bit with respect to the axis of the drill spindle and therefore a friction of the strips on the walls of the hole. To avoid this friction, a rear taper or peeling is generally provided on the strips, such that the shank diameter of the drill is smaller than the diameter of the nozzles at a rate of 10 μm on the diameter per 10 mm of length of the drill. The purpose of skinning is to create play between the strips and the walls of the drilled hole and thus avoid that: the torque does not increase too much with the depth drilled the wall of the hole is not degraded by friction the heating of the drilling is too great The boring must not however be too great in order not to degrade the centering of the drill in the hole and thus risk that the boring will off-center with respect to the desired path. Certain materials are adherent. This results, during drilling, in a phenomenon of adhesion of the cut material to the cutting face of the drill or to its strips when the cutting conditions, for example lubrication, are not adequate (typical adhesion of the titanium when the speed is too high because of overheating, even if the lubrication is adequate). This occurs with certain aluminum or titanium alloys. The consequences of this adhesion phenomenon are: premature wear of the drill, risk of breakage, overheating; a degraded geometry and surface condition of the hole; greater cutting forces than normal. Another parasitic phenomenon is linked to the evacuation of the chips or during a drilling operation. On twist drills, the ascent of shavings is exerted in part naturally by the friction of the shavings against the wall of the drilled hole, which tends to make them follow the flute, helical, until the extraction of the hole. Evacuation is also obtained by injecting oiled compressed air into two channels present in the body of the drill. The compressed air comes out of the channels at the end of the drill on the undercut faces of the drill, it emerges from the hole being drilled up by the two flutes in the case of twist or symmetrical drills or the flute in the case of three drills - quarters. When the blowing of compressed air or the size of the chips are not satisfactory, the chips can "stuff", that is to say accumulate excessively in the hole during drilling, and cause: a risk of breakage, of reheating; a degraded surface state of the hole; greater cutting forces than normal. Such parasitic phenomena disturb the measurement of the load on the drill during drilling and thus harm: to the evaluation of the wear of the drill, to the identification of the material being drilled, and therefore to the quality of a drilling. 3. Objectives of the invention The invention particularly aims to provide an effective solution to at least some of these different problems. In particular, according to at least one embodiment, an objective of the invention is to optimize the performance of drilling operations, in particular to improve the quality of the holes and / or to better generate the use of cutting tools . In particular, the invention aims, according to at least one embodiment, to make the identification of a material during drilling more reliable. Another object of the invention is, according to at least one embodiment, to make the detection of wear of a drill more reliable. Another objective of the invention is, according to at least one embodiment, to make it possible to detect the existence of a jamming of chips during a drilling operation. Another objective of the invention is, according to at least one embodiment, to make it possible to assess the level of direct friction or by poor evacuation of the chips from the strips of a drill against the walls of an element being drilled . Another object of the invention is, according to at least one embodiment, to provide such a technique which is simple and / or reliable. 4. Presentation of the invention For this, the invention provides a method of drilling an element to be drilled by means of a drilling device and a cutting tool comprising strips and cutting edges, said method comprising a step of determining at least one load value representative of the overall drag due to the internal friction of said piercing device and to the friction of said strips in said element to be drilled, this step comprising the following sub-steps: stopping said drilling operation; receding said cutting tool over a predetermined distance; driving said cutting tool with predetermined cutting parameters; measuring at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled, and after stabilization of said load values, said at least one measured load value being representative of said overall drag. Thus, the invention is based on an original approach which consists in determining, during a drilling operation, the overall drag due to the internal friction of a drilling device and to the friction of the strips against the walls of the pierced element. . Such a parameter can be used, during a drilling operation, to detect the occurrence of an event the taking into consideration of which may allow drilling to be optimized. For example, during a given drilling operation, reaching a predetermined high threshold by global drag may mean that the drill and / or the drilling device is worn, or more generally an anomaly. The drilling operation can then be stopped and / or an alert message sent so that measures are taken to correct the problem or problems that have arisen in order to improve the quality of the drilling. According to a possible variant, a method according to the invention comprises a step of determining at least one load value representative of the drag of the strips due to the friction of said strips in said element to be drilled, this step comprising the following substeps: determining at least one load value representative of the drag of said piercing device due to the internal friction of said piercing device operating with said predetermined cutting parameters; the subtraction, from said at least one load value representative of the overall drag, of said at least one load value representative of the drag of said piercing device, the result of said subtraction being equal to said at least one representative load value of the listel trail. Such a parameter can be used, during a drilling operation, to detect the occurrence of an event the taking into consideration of which can optimize drilling, in particular poor chip evacuation (jamming) or tightening of the material on the drill. According to a possible variant, a method according to the invention comprises a step of determining at least one load value representative of the cutting forces generated by the removal of material from said element to be drilled during a drilling operation, comprising the following sub-steps: measuring at least one load value during the drilling of said element to be drilled with said predetermined cutting parameters; subtraction from said at least one load value measured during drilling of said element to be drilled from said at least one load value representative of said overall drag, the result of said subtraction being equal to said at least one representative load value cutting forces. Such a parameter can be used, during a drilling operation, to detect the occurrence of an event the taking into consideration of which can make it possible to optimize the drilling, in particular wear of the cutting edges or an adherent material. In this case, and according to a possible variant in which said predetermined cutting parameters are reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the operation of drilling in progress, said method comprising a step of comparing said at least one load value representative of the cutting forces with predetermined intervals of reference load value representative of the cutting forces, each of said intervals being specific to one of the materials of said group. In this case, a method according to the invention may further comprise a step of stopping the drilling operation in progress and / or of issuing an alert signal when said at least one charge value representative of the cutting forces does not belong to any of said reference load value intervals representative of the cutting forces. According to a possible variant, a method according to the invention comprises a step of verifying the friction of said strips comprising: comparing said at least one load value representative of the drag of the listels with a predetermined threshold value; detecting an abnormal friction of said strips when said at least one load value representative of the drag of the strips becomes greater than said predetermined threshold value. In this case, a method according to the invention preferably comprises a cleaning step when it is detected that the friction of the strips is abnormal. According to a possible variant in which said predetermined cutting parameters are predetermined material cutting parameters specific to the material being drilled and to the type of drill used to carry out the drilling operation in progress, a method according to the invention comprises a step of verifying the cutting forces comprising comparing said at least one load value representative of the cutting forces to a standard interval of predetermined material cutting load values specific to the material being drilled for a drill whose cutting edges have the minimum quality required for correct drilling and for said predetermined material cutting parameters. Said step of checking the cutting forces preferably comprises the detection of anomalous cutting forces when said at least one load value ίο representative of the cutting forces is not included in said standard range of material cutting load values. According to a possible variant, a method according to the invention comprises a step of identifying the material during drilling, said identification step comprising: a step of activating or maintaining the reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress; a step of determining the material being drilled, said material being drilled being that in which the range of value of reference loads representative of the cutting forces contains said at least one load value representative of the cutting forces; a step of activating predetermined material cutting parameters specific to the material identified in said determining step and to the type of drill used; a step of determining at least one load value representative of the cutting forces with said material cutting parameters; a step of validating the material identified during said determining step, said determination of the material being validated when the at least one load value representative of the cutting forces, determined by implementing said material cutting parameters, belongs at a range of load values representative of the predetermined cutting forces with said material cutting parameters for the identified material. The implementation of such a step makes it possible to reliably identify the material being drilled. According to a possible variant, a method according to the invention comprises a step of stopping said drilling when it is detected that the cutting forces are abnormal or that no material is identified. According to a possible variant, a method according to the invention comprises a step of transmitting an alert signal when it is detected that the friction of the strips is abnormal and / or when it is detected that the cutting forces are abnormal and / or that no material is identified. The present invention also relates to a drilling device intended to be used to carry out at least one drilling operation of an element to be drilled by means of a cutting tool comprising strips and cutting edges, said device comprising means for determining at least one load value representative of the overall drag due to the internal friction of said piercing device and to the friction of said strips in said element to be drilled, these determination means comprising: means for stopping said drilling operation; means for reversing said cutting tool over a predetermined distance; means for driving said cutting tool with predetermined cutting parameters; means for measuring at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled, and after stabilization of said values load, said at least one measured load value being representative of said overall drag. According to a possible variant, a device according to the invention comprises means for determining at least one load value representative of the drag of the strips due to the friction of said strips in said element to be drilled, these means comprising: means for determining at least one load value representative of the drag of said piercing device due to the internal friction of said piercing device operating with said predetermined cutting parameters; means for subtracting said at least one load value representative of the overall drag from said at least one load value representative of the drag of said piercing device, the result of said subtraction being equal to said at least one value of load representative of the listell trail. According to a possible variant, a device according to the invention comprises means for determining at least one load value representative of the cutting forces generated by the removal of material from said element to be drilled during a drilling operation, these means including: means for measuring at least one load value during the drilling of said element to be drilled with said predetermined cutting parameters; means for subtracting, from said at least one load value measured during the drilling of said element to be drilled, from said at least one load value representative of said overall drag, the result of said subtraction being equal to said at least one value load representative of the cutting forces. According to a possible variant, in which said predetermined cutting parameters are reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress, a device according to the invention comprises means for comparing said at least one load value representative of the cutting forces with predetermined intervals of reference load value representative of the cutting forces, each of said intervals being specific to one of the materials of said group. According to a possible variant, a device according to the invention comprises means for stopping the drilling operation in progress and / or for emitting an alert signal when said at least one load value representative of the efforts of cutting does not belong to any of said reference load value intervals representative of the cutting forces. According to a possible variant, a device according to the invention comprises means for checking the friction of said strips, comprising: means for comparing said at least one load value representative of the drag of the listels with a predetermined threshold value; means for detecting an abnormal friction of said strips when said at least one load value representative of the drag of the strips becomes greater than said predetermined threshold value. According to a possible variant, a device according to the invention comprises means for controlling a cleaning when it is detected that the friction of the strips is abnormal. According to a possible variant, in which said predetermined cutting parameters are predetermined material cutting parameters specific to the material being drilled and to the type of drill used to carry out the drilling operation in progress, a device according to the invention comprises means for verifying the cutting forces comprising means for comparing said at least one load value representative of the cutting forces with a standard interval of predetermined material cutting load values specific to the material being drilled for a drill whose cutting edges have the minimum quality required for correct drilling and for said predetermined material cutting parameters. According to a possible variant, a device according to the invention comprises means for detecting anomalous cutting forces when said at least one load value representative of the cutting forces is not included in said standard interval of cutting load values matter. According to a possible variant, a device according to the invention comprises means for identifying the material being drilled, said identification means comprising: means for activating or maintaining the reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress; means for determining the material being drilled, said material being drilled being that in which the range of reference load values representative of the cutting forces contains said at least one load value representative of the cutting forces; means for activating predetermined material cutting parameters specific to the material identified in said determination step and to the type of drill used; means for determining at least one load value representative of the cutting forces with said material cutting parameters; means for validating the material identified during said determination step, said determination of the material being validated when the at least one load value representative of the cutting forces, determined by implementing said material cutting parameters, belongs at a range of load values representative of the predetermined cutting forces with said material cutting parameters for the identified material. According to a possible variant, a device according to the invention comprises means for stopping said drilling operation when it is detected that the cutting forces are abnormal or that no material is identified. According to a possible variant, a device according to the invention comprises means for transmitting an alert signal when it is detected that the friction of the strips is abnormal and / or when it is detected that the cutting forces are abnormal and / or that no material is identified. The present invention also relates to a computer program comprising program code instructions for executing the steps of the drilling method according to any of the variants set out above, when said program being executed by a processor. The present invention also relates to a recording medium readable by a computer on which is recorded a computer program comprising program code instructions for the execution of the steps of the drilling method according to any of the variants set out above. before, when said program being executed by a processor. 5. List of figures, tables and annex Other characteristics and advantages of the invention will appear on reading the following description of particular embodiments, given by way of simple illustrative and nonlimiting example, and of the appended drawings among which: Figures la and lb illustrate a drilling device according to the invention with detachable head; FIG. 2 illustrates a controller of a drilling device according to the invention; Figure 3 illustrates the end of a drill; Figures 4 to 9 illustrate flowcharts for laboratory evaluation of a drilling head; FIG. 10 illustrates the movement of a drill bit in a part to be drilled comprising two layers of materials 201, 202 during a process according to the invention. Tables 1 to 9 illustrate data tables taken into account when implementing an example of a method according to the invention. The appendix illustrates a flow diagram of an example drilling method according to the invention. 6. Description of particular embodiments 6.1. Device A drilling device or drill for implementing a method according to the invention comprises a drill or a drilling robot with controlled cutting parameters. Such a drilling device is known per se to those skilled in the art and is not described in detail here apart from the elements more specific to the invention. As shown in FIGS. 1 a and 1 b, such a drilling device 10 comprises a casing 11. The casing 11 comprises a first portion of the casing 110 and a second portion of the casing III which extend substantially perpendicular to one another. Alternatively, the casing could extend along a single axis and thus not have an essentially T shape. The drill comprises an output shaft 12, or spindle, movable in rotation and in translation along the same axis. This output shaft 12 is connected by means of one or more transmission chains to motor means. In this embodiment, the motor means comprise: an electric motor for rotating 14 linked to the output shaft 12 by a transmission chain 15 making it possible to rotate the output shaft 12, and therefore the drill 13 which is secured thereto, and an electric advance motor 16, linked to the output shaft 12 by a transmission chain 17 making it possible to drive the output shaft 12 in translation, and therefore the drill which is joined to it. Rotational training and advance training are done on the same axis. Such a principle is notably described in the document FR3000693. The drilling device comprises a removable drill head 301. This corresponds to the second portion of casing 111. Reversible mechanical and electrical connection means 303 will conventionally be implemented between the removable drill head 301 and the first portion of housing 110 (i.e. the body of the drill). This head includes a memory 135 such as for example an RFID chip with any other suitable data storage means. The first portion of casing 110 will therefore include a reader 25 capable of reading the information contained in the memory associated with the drill head 301. The load on the drill bit in the air of a drilling device results essentially from friction which takes place inside the removable drill head and the rest of the casing. The head comprises means 20 for fastening a cutting tool 13, for example a drill, placed at the end of the output shaft 12. These fastening means can for example comprise a drill clamp. Obviously, these securing means can make it possible to secure a plurality of different drills to the drill. During the life of the drill the information relating to the drill is carried by the memory integrated in the head. In a variant, it could be envisaged that the memory is integrated directly into the drill. In these two variants, it will be said that the memory is associated with the drill whether it is integrated into its tool holder or directly in the drill. An alternative to an RFID tag could be an electronic memory connected to the drill controller by electrical connectors. The drill is connected to a controller 19 by a cable which conventionally comprises power supply wires 210 from the motors and possibly communication wires 211. It may possibly also include tubes for the passage of fluid (s) such as lubricant. According to the embodiment illustrated in FIG. 2, the controller 19 comprises a random access memory 180 (for example a RAM memory), a processing unit 181 equipped for example with a processor, and controlled by a computer program, comprising program code instructions for executing a drilling method according to the invention, this program being stored in a read-only memory 182 (for example a ROM memory). The controller also includes a wired or wireless transmission / reception module 183 allowing it to communicate with the drill and possibly with other equipment such as a computer network, this transmission / reception module including: a receiver for receiving signals delivered by the various measurement means (sensor) integrated into the drill; a transmitter to issue commands to the drill. The drill also includes a transmit / receive module (not shown) for communicating with the controller. The controller also includes an input-output interface 193, a user interface for managing a command input means 194 (davit, touch screen, mouse, etc.), a display means 195 (screen, display, indicator light) and possibly a means of transmitting an audible signal on an audible frequency 196. The input-output interface can be used to program drilling strategies. The drill can by itself integrate a man-machine interface 24 allowing the starting of the drilling and the visualization of information relating to the progress of the drilling. This controller 19 comprises two power supplies 191, 192 making it possible to supply the rotary drive motor 14 of the drill and the feed motor 16. These supplies can for example be inverters suitable for supplying synchronous motors with permanent magnets. These motors are provided with an angle sensor 141, 161 whose signal, representative of the angle of the rotor relative to the stator, is used by the inverters to supply the synchronous motors correctly. The controller 19 comprises a connector 196 for connection to a source of electrical current supply. The controller is separated from the drill. In a variant, it could be integrated therein, that is to say be housed inside the casing of the drill. On initialization, the code instructions of the computer program are for example loaded into the random access memory 180 before being executed by the processor of the processing unit 181. The random access memory 180 contains in particular the appropriate calculation formulas of the different quantities determined during the implementation of the process. The processor of the processing unit 181 performs the various necessary calculations. It can then, for example, display the result, save it, transmit it to a network, compare it to one or more predetermined threshold values and, if necessary, control the tightening device accordingly, issue a visual and / or audible alarm in if necessary ... FIG. 2 illustrates only one particular way, among several possible, of making a controller, so that it performs the steps of the drilling method according to the invention (in any one of the different embodiments, or in a combination of these embodiments). Indeed, these steps can be carried out indifferently on a reprogrammable calculation machine (a PC computer, a DSP processor or a microcontroller) executing a program comprising a sequence of instructions, or on a dedicated calculation machine (for example a set of logic gates like an FPGA or an ASIC, or any other hardware module). In the case where the controller is made with a reprogrammable calculation machine, the corresponding program (i.e. the sequence of instructions) can be stored in a removable storage medium (such as for example a floppy disk, a CD-ROM or DVD-ROM) or not, this storage medium being partially or totally readable by a computer or a processor. The device comprises means for measuring at least one item of information representative of the load on the drill during drilling. This or these information includes one or a combination of several pieces of information from the following group: torque applied to the drill along its axis of rotation; axial thrust force applied to said drill; electric current or power consumed by at least one of the motors of said drilling device, said drilling device comprising a motor for driving the drill in rotation and a motor for driving in translation of said drill. The means for measuring at least one item of information representative of the load on the drill during a drilling therefore comprise one or a combination of several of the following means: a torque sensor 22 applied to the drill along its axis of rotation; an axial thrust sensor 23 capable of measuring the force applied to the drill along its axis of rotation; a 1910 electric current or power sensor consumed by at least one of the motors. These are connected to the controller 19 to process the signals. The device comprises means for determining at least one load value representative of the overall drag due to the internal friction of said piercing device and to the friction of said strips in said element to be drilled, these determination means comprising: means for stopping said drilling operation; means for reversing said cutting tool over a predetermined distance; means for driving said cutting tool with predetermined cutting parameters; means for measuring at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled, and after stabilization of said values load, said at least one measured load value being representative of said overall drag. The device comprises means for determining at least one load value representative of the drag of the strips due to the friction of said strips in said element to be drilled, these means comprising: means for determining at least one load value representative of the drag of said piercing device due to the internal friction of said piercing device operating with said predetermined cutting parameters; means for subtracting said at least one load value representative of the overall drag from said at least one load value representative of the drag of said piercing device, the result of said subtraction being equal to said at least one value of load representative of the listell trail. The drilling device comprises means for determining at least one load value representative of the cutting forces generated by the removal of material from said element to be drilled during a drilling operation, these means comprising: means for measuring at least one load value during the drilling of said element to be drilled with said predetermined cutting parameters; means for subtracting, from said at least one load value measured during the drilling of said element to be drilled, from said at least one load value representative of said overall drag, the result of said subtraction being equal to said at least one value load representative of the cutting forces. The device comprises means for activating predetermined reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress, and means for comparison of said at least one load value representative of the cutting forces with predetermined intervals of reference load value representative of the cutting forces, each of said intervals being specific to one of the materials of said group. The device comprises means for stopping the drilling operation in progress and / or sending an alert signal when said at least one load value representative of the cutting forces does not belong to any of said intervals. reference load value representative of the cutting forces. The drilling device comprises means for checking the friction of said strips, comprising: means for comparing said at least one load value representative of the drag of the listels with a predetermined threshold value; means for detecting an abnormal friction of said strips when said at least one load value representative of the drag of the strips becomes greater than said predetermined threshold value. The controller is programmed to activate a cleaning when it is detected that the friction of the strips is abnormal. A cleaning consists, during a drilling operation, to move the drill back while keeping its drive in rotation, then to drive it again in the direction of drilling. This will remove the chips from the hole being drilled. The piercing device comprises means for verifying the cutting forces, comprising means for comparing said at least one load value representative of the cutting forces with a standard interval of predetermined material cutting load values specific to the material being processed. drilling for a drill whose cutting edges have the minimum quality required for correct drilling and for said predetermined material cutting parameters. The piercing device comprises means for detecting anomalous cutting forces when said at least one load value representative of the cutting forces is not included in said standard range of material cutting load values. The piercing device comprises means for identifying the material being pierced, said identification means comprising: means for activating or maintaining predetermined reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress; means for determining the material being drilled, said material being drilled being that in which the range of reference load values representative of the cutting forces contains said at least one load value representative of the cutting forces; means for activating predetermined material cutting parameters specific to the material identified in said determination step and to the type of drill used; means for determining at least one load value representative of the cutting forces with said material cutting parameters; means for validating the material identified during said determination step, said determination of the material being validated when the at least one load value representative of the cutting forces, determined by implementing said material cutting parameters, belongs at a range of load values representative of the predetermined cutting forces with said material cutting parameters for the identified material. The controller is programmed to stop the drilling operation when it is detected that the cutting forces are abnormal or that no material is identified. The controller is programmed to generate the emission of an alert signal when it is detected that the friction of the strips is abnormal and / or when it is detected that the cutting forces are abnormal and / or that no material is not identified. The various measurement and determination means include in particular the necessary controller and sensors. 6.2. Process 6.2.0. Introduction According to the preferred embodiment of the invention, a drill is associated during its life with a removable drill head, this head carrying a memory containing the information relating to the drill. The drilling system then comprises a drill with a detachable head and a removable drill head. Alternatively, the drilling system may include a drill with an integrated head having a memory. In this case, the drill is associated with the memory of the drilling system. A device according to the invention can also be implemented for drilling elements composed of stacking successive layers of different materials, each stack constituting a group of materials. Several types of drills can be used in production, with several types of drilling devices and several different materials forming one or more groups of materials can be drilled in production. Prior to the implementation of a drilling method according to the invention, a prior evaluation of the drilling equipment (drilling systems (drill with detachable or integrated head, if necessary removable drill head) and with cutting tools) then a preparation of the drilling materials before sending to production are implemented. The preliminary assessment is carried out under laboratory conditions, that is to say outside production. Its objective is to determine standard values or intervals of standard values specific to the types of drilling equipment likely to be used in production. These standard values (or ranges of values) are representative of the forces or loads that this material will undergo or generate under nominal drilling conditions. They are evaluated in the laboratory once for each type of material given in a nominal state of use. These values are assumed to be representative of all equipment of the same type in the same nominal condition used in production. They then serve as standard values for piloting the drilling in production. The data collected during this laboratory evaluation is then used, by the tooling department of a production unit, during the preparation of drilling materials before they are sent to production. The tooling department, which classically manages the fleet of drilling equipment within the production unit, then stores in the memories of drilling equipment the values and intervals of standard values necessary for carrying out drilling operations. 6.2.1. Prior laboratory assessment In the case of a drilling system with a removable drilling head, the prior evaluation in the laboratory relates on the one hand to each type of drill with removable head and on the other hand to the torque formed by a drill type associated with a removable head type. This assessment covers different types of drills with detachable heads and different types of drills associated with their drill heads which may belong to different types. A type of drill is particularly characterized by its shape, its material, its coating, its diameter ... A type of removable drill head is notably characterized by its transmission, its dimensions, its efficiency, etc. A type of drill with removable or integrated head is characterized in particular by its transmission, its dimensions, its performance ... In the case of a drilling system with a drill with integrated head, the prior assessment in the laboratory relates to the drill equipped with a drill. The purpose of the laboratory evaluation is in particular to evaluate the following “standard” values: - reference load values representative of the cutting forces specific to the use of reference cutting parameters for a given drill and at least one given material, and associated standard tolerance intervals; - load values representative of material cutting forces specific to the use of material cutting parameters for a given drill and at least one given material, and associated standard tolerance intervals; - maximum standard load values representative of the drag of the strips specific to the use of reference cutting parameters for a drill and a given constraining material; - load values representative of the drag of the drilling system: - drill with integrated head, or - drill with detachable head and removable drill head. Cutting parameters include one or more of the following parameters: cutting speed; advance speed; frequency of rotation; type and level of lubrication; chip extraction; amplitude and frequency of the vibratory piercing component. These measurements are carried out with drills on the one hand in new condition and on the other hand with used drills. A drill is considered used when it has made approximately 80% of the holes it is able to make with a satisfactory level of precision. The drills used are in a “run-in” state, that is to say having reached a level of use corresponding to approximately 10% of their service life. The materials are the same as those used in the construction of structures that will have to be drilled in production. i. Evaluation of the drilling system i.i. Load values representative of the drag of the drilling system A preliminary step of laboratory evaluation of a drilling system comprises the determination for each type of drilling system of load values representative of the drag of the drilling system: drag of the drill with integrated head, or drag of the drill with detachable head and drag of the removable drill head. A prior step of laboratory evaluation of at least one value of charges representative of the drag of the drilling system due to internal friction therein (transmission and motor) is implemented for each type of drilling system. A type of drilling system is defined by: its design including lubrication; transmission ratio; characteristics of the transmission components; component inertia; its state of use. The drilling system can be of the detachable head type: it then comprises a drill and a removable drill head. The drilling system can be of the integrated head type: the drill and its head form a one-piece assembly. In the case of a drill with a detachable head, the drill with a detachable head (i.e. the body of the drill) will preferably be tested alone so as to determine at least one item of information representative of the drag of the drill without a removable head. The removable drill heads will be tested on a drill without a removable head already tested, so as to determine at least one item of information representative of the drag of the removable head. During a drilling operation carried out with a drill associated with a removable head, the at least one load value representative of the drag of the drill will then be equal to the sum of the at least one load value representative of the drill without removable head and at least one load value representative of the removable head. In another variant, the at least one load value representative of the drag may not be taken into account if it is negligible, that is to say less than 5% of the at least one measured load value during drilling in full material. Different strategies for evaluating the load values representative of the drag of the drilling system are envisaged, this for a type of drill, a type of head and given cutting parameters (here it is the reference parameters which are used). These strategies are applied in the laboratory for the evaluation of “benchmark” values. These strategies are classified from the simplest to the most complex. These different strategies are implemented by applying reference cutting parameters. i.1.1. Strategy 1 At least one load value is measured without load on the drill, neither axial nor torque, for a given output spindle length, and is recorded as a load value representative of the drag of the drilling device. In this case, the measurement of at least one load value is carried out by turning the drill empty while applying the reference cutting parameters corresponding to the type of drill and to the group of materials considered. 1.1.2. Strategy 2 The drag of the drilling device can vary depending on the length of the drill spindle outlet. At least one load value is measured for several spindle output lengths, no load on the drill, neither axial nor torque and recorded as a load value representative of the drag of the drilling system. Curves indicating the relationship between the at least one load value representative of the drag of the drilling system and the spindle output length are established. In this case, the evolution is recorded, as a function of the output length of the spindle from the body of the drill, at least one load value representative of the drag of the drill by turning the drill empty according to the parameters of references. 1.1.3. Strategy 3 Strategy 3 is identical to strategy 2 but with a calibrated load applied to the drill (torque and axial force) representative of an average drag of the drill bit on the walls of a hole. In this case, the recording of at least one load value representative of the drag of the drill is no longer measured by rotating the drill empty but by rotating it by subjecting the spindle to a calibrated load whose value is preferably of the order of that of the drag load of the drill. This variant makes it possible to guarantee that the measurement of at least one load value representative of the drag of the drill is carried out while the components internal to the drill supposed to be in contact in normal operation are effectively so (for example the pinions of the transmission...). This strategy improves accuracy. 1.1.4. Strategy 4 Other parameters can influence the drag of the drilling system such as the temperature of the drill or the number of drilling cycles carried out by the drilling system. Strategy 4 is identical to strategy 3 but with coefficients weighing the influence of the temperature of the drilling system and / or its wear as a function of the number of drilling cycles carried out. In this case, it will be possible to record the evolution of at least one load value representative of the drag of the drilling device, as a function of the length of exit of the spindle from the body of the drill, and / or of the temperature of the drill and / or the number of drilling cycles of the drill, by turning the drill empty or by subjecting its spindle to a calibrated load. 1.1.5. Alternative As an alternative to these strategies 1 to 4, the at least one load value representative of the drag of the drilling system may be measured at the start of drilling during the approach phase of the drill bit in the approach air. This alternative will be described later in the paragraph devoted to the application of the process in production. ii. Evaluation of the drills each associated with a removable head A preliminary stage of laboratory evaluation 50 of the drills comprises the determination for each type of drill: reference load values representative of the cutting forces on the cutting edges of the drill for each material drilled by a given drill with predetermined reference cutting parameters and corresponding standard tolerance intervals (step 51); load values representative of the material cutting forces on the cutting edges of the drill for each material drilled by a given drill with predetermined material cutting parameters and corresponding standard tolerance intervals (step 52); maximum standard load values representative of the listel drag for the binding material of each group of materials drilled with a given drill (step 53). ii.l. Reference load values representative of the cutting forces A preliminary step 51 of laboratory evaluation of reference load values representative of the cutting forces is carried out for each type of drill and each of the materials for each of the groups of materials given which may have to be drilled, including the air. Air is considered to be a material to be drilled since before entering an element to be drilled, the drill bit is located in the ambient air called approach air. After having left the element to be drilled, the drill is located in the ambient air called outlet air. This step 51 includes: the determination 510 of reference cutting parameters for said type of drill as a function of the materials of said group of materials: these reference parameters are the binding cutting parameters for a given group of materials, ie they are the cutting parameters based on the cutting speed and feed values of the material (s) imposing minimum or maximum limit values, below or above which a major drawback appears, such as premature wear of the cutting edges of the drill. They are specific to a type of drill and to a group of materials; drilling 511 of each of the materials with a drill of said type by implementing the reference cutting parameters corresponding to said drill and to said group of materials; measurement 512 during these drilling of at least one gross load value on said drill; the determination 513 of at least one load value representative of an overall drag comprising during each of these bores: stop 5130 of said drilling; the recoil 5131 of the cutting tool over a predetermined distance; the drive 5132 of the cutting tool with the reference cutting parameters corresponding to said drill bit and to said material; measurement 5133 of at least one load value during the training of the cutting tool before its cutting edges again come into contact with the element to be drilled and after stabilization of the at least one value of measured load, the at least one measured load value being representative of said overall drag; subtracting 514, at each gross load value on said drill, from the load value representative of the overall drag, the result obtained corresponding to reference load values representative of the cutting forces of the material considered; repeating 515 of steps 511 to 514 an equal number of times with new and used drills; definition 516 with said results obtained of a standard tolerance interval for or less a reference load value representative of the cutting forces of each material: this interval is defined so as to cover variations in material load due to variations in characteristics matter, drill, head and vibration phenomena and slight variations in motor speeds. The use of new and used drills makes it possible to effectively take into account the variability of the load values resulting from a more or less strong wear of the cutting edges and thus to determine significant standard intervals. ii.2. Load values representative of material cutting forces A preliminary step 52 of laboratory evaluation of load values representative of the material cutting forces is implemented for each type of drill and each of the materials which may have to be drilled, including the approach air and the outlet air. She understands : the determination 520 of the cutting parameters for said type of drill for each material: these allow optimal drilling for each of the materials with the type of drill considered; drilling 521 of each of the materials with a drill of said type using the cutting parameters corresponding to said drill and to said material; measurement 522 during these drilling of at least one gross load value on said drill; the determination 523 of at least one value of charges representative of an overall drag comprising during each of these drilling: stop 5230 of said drilling; the recoil 5231 of the cutting tool over a predetermined distance; the drive 5232 of the cutting tool with the cutting parameters corresponding to said drill and to said material; measuring 5433 of at least one load value during the training of the cutting tool before its cutting edges again come into contact with the element to be drilled, the at least one measured load value being representative of said overall drag; subtracting 524, at each gross load value on said drill bit, from the overall drag load value, the result obtained corresponding to load values representative of the cutting forces of the material considered; repeating 525 of steps 521 to 524 an equal number of times with new and used drills; definition 526 with said results obtained of a standard tolerance interval for or less a load value representative of the cutting forces of each material: this interval is defined so as to cover the variations in material load due to variations in the characteristics of the material, drill, head and vibration phenomena and slight variations in motor speeds. The use of new and used drills makes it possible to effectively take into account the variability of the load values resulting from a more or less strong wear of the cutting edges and thus to determine significant standard intervals. ii.3. Maximum standard load values representative of the listel drag A preliminary step 53 of laboratory evaluation of at least one maximum standard load value representative of the drag of the strips is carried out for each type of drill and for the most restrictive material of each group of materials which may be required to be perforated. She understands : the determination 530 of reference cutting parameters for said type of drill according to the materials of said group of materials: these reference cutting parameters are the binding cutting parameters for a given group of materials, ie they are the cutting parameters based on the values of cutting speed and feed rate of the material (s) imposing minimum or maximum limit values, below or above which a major drawback appears, such as premature wear of the cutting edges of the drill . They are specific to a type of drill and to a group of materials; drilling 531 of the constraining material of the group of materials considered over a predetermined depth (of the order of 1.5 times the diameter) with a drill of said type by implementing the cutting parameters of the constraining material corresponding to said drill and audit group of subjects considered; the recoil 532 of the drill over a predetermined distance (approximately 0.5 to 1 mm); the application 533 of the reference cutting parameters to the drill during a "cutting advance stroke"; measurement 534 of at least one load value during the "advance stroke without cutting", after stabilization at the start of the stroke and before the stops of the drill are likely to plunge back into the material due to the amplitude of vibratory advance at the end of the stroke. This at least one load value is representative of the overall drag (drilling system and listels); obtaining 535 of at least one load value representative of the drag of the drilling system (according to one of the abovementioned strategies within the framework of the qualification of the drilling system); the calculation 536 of at least one load value representative of the drag of the listels, each load value representative of the drag of the listels being equal to a load value representative of the overall drag minus a load value representative of the drag of the drilling system; repetition 537 at least once of the same previous operations with other drills of the same type, new and used; calculation 538 of the average of said load values representative of the drag of the listels, increased by a coefficient of 50%, the result obtained corresponding to a value of maximum standard load that the drag of the listels must not exceed. iii. Data from laboratory assessment The values obtained during previous laboratory evaluations are recorded in a database to allow the configuration of drilling systems intended to be used in production on applications characterized by: - a type of drill - a group of material to be drilled - a drill head and a drill body in the case of a drill with a detachable head, or a drill with an integrated head. The values previously evaluated are therefore grouped in the form of tables necessary for the configuration of each application. So we find for each application: - a table of the type of that of table 1 listing the elements characterizing the application; - a table of the type of that of table 2 grouping reference cutting parameters of the application; - a table of the type of that of table 3 grouping, for each material of the material group of the application, the values of reference loads representative of the cutting forces (reference loads under reference cutting parameters), the cutting parameters material, the load values representative of the material cutting forces (cutting loads under material cutting parameters); and, in the case of a drill with a detachable head: - a table of the type of that in Table 4 grouping, for each strategy described in the paragraph devoted to the prior laboratory evaluation, the load values representative of the drag of the detachable drill head (reference loads under cutting parameters reference) ; - a table of the type of that of table 5 grouping, for each strategy described in the paragraph devoted to the prior assessment in the laboratory, the load values representative of the drag of the drill body with detachable head (reference loads under parameters of reference cut); or in the case of a drill with integrated head: - a table of the type of that in Table 6 grouping, for each strategy described in the paragraph devoted to the prior assessment in the laboratory, the load values representative of the drag of the drill body with integrated head (reference loads under parameters of reference section). Building blocks of an application Drilling deviceconsisting of; Drill type AT Drill head B Body “3rd head drill VS Integrated head drill / Subject group formed by; Mat 1 Mat 2 Mat 3 Approach air Screed air Outlet air Table 1 Reference cutting parameters Start of measurement stroke End of measurement stroke Rotation speed Advance per turn Lubrication Vibratory drilling Table 2 Parameters relating to the drill and recorded in the memory integrated in the detachable head or in the drill with an integrated head "TJesêQJδΌv>Φ+ -fΓ56youIZ>Έat.£V£ -SwhadTJ£3Φ5> IF U 3 Al § 1 o r VJ "a> -a ά <y 43"'Oh Φ 3 = OW Xtt£ e:Ê t. 3 a. w "Φ | § 0 5 3 Φ") Ό Ό S J! JS o. ï 3 ao ™ u i vs | Material cutting parameters Drillingvibratory Lubrication Advance bytower o OE 4i .2 V »f * ss £ S o> u | Reference load values representative of the cutting forces „Rtj fl>’ φÎX '0 # ü ** <V C 8I’m so X Listel Trail Coupie X Cutting thrust on cutting edges X"9g S£ U “Si g- g S S <U ω • ^ 3 V,“ £ α * £ 3 Sa o U x vs£ 4 · *AT 55 <N"D"s m"s Approach air atAT"JZUΦ* oU. <uliOνΊΦΌK.< ffl œ ju Xi A3 Parameters relative * to your detachable drill head and saved in its memory Load values representative of the drag of the drill head Nominal drag torque Nominal drag thrust [SSrtigiëT Ctnom (fixed value) Ptnom (fixed value) OR ^^^ ΙΞΞΙΞΞΞΞΞΞΞΞΞΞΞΖίύίΚΞΠΪΙΐΖΞΞΞΞΞΞΞΞΞΞΞΕΞΞΞΖΞΞΞΞΞροίϊΐΚΞΕϋΙΕΞΞΞΞΞΞΞΞΏ OR igatW "3 ............................ 1 ~~; .............. ........................ j Couoie = F (teF ~ 'j 1Z Z ~ mi ^ iCïTSÏ' '' ~ '...... ...................... I or (StârtëgïêT Z '-] (ig / T't .. << b tu e ;, j_T ~ PÔusw ί. (.g î <. ni cycle ·) ~~ | Ig = spindle length output nb cycles = number of drilling cycles carried out by the drill and characterizing its wear Table 4 Parameters relating to the body of a detachable head drill stored in its memory Loader values representative of the drag of the detachable head drill core Trail couple named Nominal drag thrust Staitéÿèï Cenom (fixed value! Penom (fixed value) or Startégie 2 £ yu E te = 1 (ig j Grows. · - m f te) What s »Wël -.......... ... ............................. û Wit ......... ni te l .... ................................ .......... Zl Thrust = o (te 1 OR Torque = p (Ig; Fc; nb cycles) Thrust - q (ι ", Il, nb cycle ·, i Table 5 Parameters relating to a Drill with Integrated head recorded “all its memory Load values representative of the drag of the integrated head drill Nominal drag torque Nominal drag thrust (Startégie 1 " Cenom (fixed value) Pc name (fixed value) or [5ÜrtégîF2 ~ T or _ S ^ SîZIZZZZZZZZZZZsûotesnjjj Thrust = "(such Thrust = o (Ig} OR ________________ [Startégie 4) ’ZZüZZ- p (îg. T‘ 'ZZtZÿüëT) ~ [~ PÔüZZe = q (te; Γ'ΖΖΐΖΖΖΖ I Table 6 6.2.2. Preparation of equipment for production The tables resulting from the laboratory evaluation are made available to the company's 15 tooling department, in the form of digital files, to enable it to prepare the drilling materials before putting them into production. The tooling department is responsible for the storage and preparation of drilling materials (drilling system and cutting tool) for their use in production. So each time this tooling department receives a new drilling system component (drill with integrated head, drill body with detachable head, detachable drill head), the operator loads into the memory of the drill body or in the detachable head or in the drill, the various applications envisaged where this component may be used, as well as, for each of these applications, the corresponding digital files (or tables of values). The memory of a drill body will therefore receive the tables of the type of table 5 of the different applications where this body is likely to be used, as well as a table of the type of table 8 listing the different applications where this body is likely to 'be used and for each of these applications the corresponding table 5. Drill body memory Application Table 15 1 2 3 4 5 Table 8 The memory of a detachable head will therefore receive the tables of the type of tables 2, 3 and 4 of the different applications where this head is likely to be used, as well as a table of the type of table 7 listing the different applications where this head detachable can be used and for each of these applications the corresponding tables 2, 3 and 4. Detachable head memory Application Table 12 Table 13 Table 14 1 2 345 Table 7 The memory of a drill with integrated head will therefore receive the tables of the type of tables 2, 3 and 6 of the different applications where this drill is likely to be used, as well as a table of the type of table 9 listing the different applications where this drill with integrated head is capable of being used and for each of these applications tables of the type of tables 2, 3 and 6 corresponding. Memory strikes : integrated head Application Table 12 Table 13 Table 16 1 2 3 4 5 Table 9 In a variant, these parameters can be stored in the memory of the drill. In another variant these parameters can be stored on a server of the company to which the drill would have access by radio communication. Similarly when the laboratory department publishes values files necessary for a new application or a correction of the values of an existing application, the operator of the tooling department updates the memories of the components of the drilling systems. When the tool department operator receives a preparation request for a given application, he takes the drill body, the drill head (or the drill with integrated head) and the drill necessary for the application from his warehouse, assembles these components and makes the drilling system thus made available to the production department. 6.2.2. Application of the process in production In order to perform a drilling operation on an element comprising a stack of a succession of layers of different materials forming a group of materials, the production department obtains from the tooling department the drilling system suitable for its application. When using the drilling system, the production operator selects the application concerned using the man-machine interface of the drilling system. The drilling system controller will then search the memories of the detachable head drill body and the detachable drill head (or the drill with integrated head) for the values in tables 2, 3, 4, 5, 6 corresponding to this application. The drilling operation is then carried out according to the selected application preprogrammed in the controller 19. During the implementation of the method, that is to say during all the phases of movement of the drill in a material including the airs of approach and exit, a measurement is carried out, preferably continuously (in time actual), at least one gross load value on the drill. This can consist of measuring one or more parameters among the torque transmitted to the drill by the sensor 22, the axial thrust transmitted to the drill by the sensor 23, the power or the electric current consumed by at least one of the motors. drive in rotation or in translation via the 1910 sensor. A gross load value is therefore that delivered by a sensor which is then used to determine physical quantities used in the context of drilling regulation. When the drill moves in the approach air before its cutting edges enter the workpiece, the at least one gross load value measured after stabilization is in reality essentially representative of the internal friction of the drilling since the friction of the listels in the approach air is negligible. The drill 13 is driven in the direction of the part to be drilled during an approach phase 71. During an optional step 711, the drill is driven with the reference cutting parameters. The at least one gross load value measured in real time, before the cutting edges enters the workpiece, is representative of the drag of the drilling system. This value is stored in the system memory (step 712). The implementation of these steps 711 and 712 therefore makes it possible to avoid the laboratory determination of at least one load value representative of the drag of the drilling system according to one of the strategies 1 to 4 described previously in the paragraph devoted to the prior evaluation in the laboratory, and its recording by the tooling department in the memory of the drilling system. During a step 713, the drill is driven according to the cutting parameters of the predetermined approach air and stored in its memory. These cutting parameters can for example include a frequency of rotation, a speed of advance ... (cf. Figures 13). The measurement of at least one gross load value during the movement of the drill bit in the approach air, with the cutting parameters of the approach air, before its cutting edges enter the workpiece drilling, constitutes a step of measuring at least one load value representative of the drag of the drilling system operating with the cutting parameters of the approach air. This value is stored in the system memory (step 714). The determination of at least one load value representative of the drag of the drilling system with the parameters of cut of the approach air and the determination of at least one load value representative of the drag of the drilling system with the reference cutting parameters can be gathered in a single step: if the speed of rotation of the drill during the approach phase is chosen as that of the reference cutting parameters, and if in the course of the process, only the load value taken into consideration is that relating to the cutting torque. The method comprises a step 72 of detecting the entry of the drill 13 into the element to be drilled. In this embodiment, this step comprises: - The determination 720 of at least one load value representative of the cutting forces in the approach air corresponding to the subtraction from the at least one gross load value measured in real time during the movement of the drill in the approach air of the at least one load value representative of the drag of the piercing device operating with the cutting parameters of the approach air determined in step 714; the verification 721 of the presence of the at least one load value representative of the cutting forces in the approach air within the predetermined standard interval of load values representative of the cutting forces in the approach air corresponding to the drill, - the detection 722 of the entry of the drill into the element to be drilled when the at least one load value representative of the cutting forces in the approach air is no longer within the standard interval predetermined load values representative of the cutting forces in the approach air; the non-detection 723 of the entry of the drill bit into the element to be drilled when the at least one load value representative of the cutting forces in the approach air remains within the predetermined standard interval of load values representative of the cutting forces in the approach air. If it is detected that the drill has not entered the workpiece, the drilling process continues until it is detected that the drill has entered the workpiece. The sequence of sub-steps of step 72 constitutes a verification loop repeated at a frequency of several kilohertz corresponding to the calculation frequency of the controller. When it is detected that the drill has entered the part to be drilled, which is comparable to a change of material (passage of the approach air to the first layer of material of the element to be drilled), a step verification of an actual material change is implemented during which the reference cutting parameters corresponding to the type of drill used and to the group of materials being drilled are activated. This step includes a step 73 for verifying the friction of the strips, comprising: measurement 730 of at least one load value representative of the overall drag due to the friction of the drilling system and to the friction of the strips; the determination 731 of at least one load value representative of the drag of the drilling system; determining 732 at least one load value representative of the drag of the listels; comparing 733 of the at least one load value representative of the drag of the listels with the predetermined maximum standard load value of the listels drag corresponding to the material group and to the type of drill considered. Measurement 730 of at least one load value representative of the overall drag comprises: stop 7300 of the drilling operation in progress; the recoil 7301 of the cutting tool over a predetermined distance (for example between 0.5 and 1 millimeter); the drive 7302 of the cutting tool with the predetermined reference cutting parameters corresponding to the type of drill and to the group of materials considered; measurement 7303 of at least one gross load value during the training of the cutting tool with the reference cutting parameters before its cutting edges again come into contact with the element to be drilled, c that is to say during an advance stroke without cutting, the at least one measured gross load value being representative of the overall drag. This measurement is made after the load values have stabilized at the start of the drill movement. This stabilization is necessary because the load values on restart are subject to fluctuations due to the dynamic effects caused by this restart. This stabilization is obtained after a drill stroke of the order of 0.2 millimeters. The determination 731 of at least one load value representative of the drag of the drilling system consists in taking into account the values measured and recorded in optional step 712 of the process or measured in the laboratory according to one of strategies 1 to 4. described above and then registered by the tooling department before putting into production corresponding to the drill and / or the head used. If these values are weighted as a function of the output length of the spindle of the drill in accordance with one of the strategies 2 to 4, then a step of determining the length of output of the spindle is implemented. Such a step is conventional and known to those skilled in the art. At least one load value representative of the drag of the drilling system is then determined as a function of the output length of the spindle by using the curves recorded in the memory of the drill. If other weighting factors are used, such as the temperature of the drill and / or the number of cycles thereof, then these parameters are measured in a manner known per se to those skilled in the art and the corresponding curves are used to determine at least one load value representative of the drag of the drilling system. The determination 732 of at least one load value representative of the drag of the listels comprises subtracting, from the at least one load value representative of the overall drag measured in step 7303, from the at least one value of load representative of the drag of the drilling system. Of course, we subtract load values of the same physical magnitude. For example, if we measure as a load value representative of the overall drag and as a load value representative of the drag of the drilling system, the axial thrust and the torque, we will obtain two load values representative of the drag of the listels, namely one expressed in N (unit representative of the axial thrust) and the other expressed in Nm (unit representative of the torque). A step 733 of comparing the at least one load value representative of the listel drag becomes greater than the maximum standard load value representative of the listel drag with the maximum standard load value representative of the listel drag corresponding to the group materials and the type of drill considered is used. When the at least one load value representative of the drag of the strips becomes greater than the maximum standard load value representative of the drag of the strips corresponding to the material group and to the type of drill considered, it is deduced therefrom that the friction of the strips is abnormal (step 734). When it is detected 734 that the friction of the strips is abnormal (number of consecutive detections of abnormal friction of the strips equal to 1), a step 74 of cleaning is carried out. The step 74 of cleaning is followed by a new step 73 of checking the friction of the strips. If the friction is again classified as abnormal (number of consecutive detections of abnormal listel friction equal to 2), the drilling is stopped (step 75), the drill bit is retracted (step 76) and an alert intended for the operator is sent (step 77) to indicate the occurrence of an anomaly. If the friction of the strips is qualified as normal (step 735), the drilling process continues. A step 78 of determining the material during drilling is implemented. An activation 780 of the predetermined reference parameters recorded in the memory associated with the drill and corresponding to the group of materials concerned is implemented, or these parameters are maintained if they have not been temporarily stopped. At least one piece of information representative of the gross load on the drill is measured after a stabilization phase thereof and complete engagement of the cutting edges (or cutting tips) in the new material (step 781). The measurement phase can take place over a stroke of the drill between 0.5 and 1 millimeter. At least one load value representative of the cutting forces is calculated (step 782). This is equal to the subtraction, from at least one gross load value on the drill measured in step 781, from the at least one load value representative of the overall drag previously determined in step 730 . The at least one load value representative of the cutting forces is compared by the controller to the standard intervals of reference load value representative of the cutting forces recorded in the drill memory for each of the materials of the group (step 783). The material being drilled identified is that of which the reference load value interval representative of the cutting forces contains at least one calculated load value representative of the cutting forces (step 784). If the at least one load value representative of the calculated cutting forces does not belong to any standard interval of reference load value representative of the cutting forces of the various known materials (step 785), the drilling in progress does not correspond to the drilling of a known material which is the meaning of a potential anomaly. The drilling is then stopped (step 75), the drill retracted (step 76) and an alert sent (step 77) to the operator to indicate to him that the cutting edges of the drill are potentially degraded. In the case where a known material is identified (step 784), and the identified material is not the outlet air, a step 79 of verifying the cutting forces of the identified material is then implemented. Step 79 of verifying the cutting forces comprises a step 790 of measuring at least one load value representative of the overall drag due to the friction of the piercing device and to the friction of the strips. This step 790 comprises: a step 7901 for stopping the drilling in progress; a step 7902 of retracting the drill over a predetermined distance (for example between 0.5 and 1 millimeter) a step 7903 for training the drill, with the predetermined material cutting parameters corresponding to the drill used and to the identified material, on the advance stroke without cutting; a step 7904 of measuring, during the advance phase without cutting, at least one gross load value before the edges of the drill plunge back into the material and after stabilization of the load values; these load values are representative of the overall drag (drilling system friction + list friction). Step 79 then comprises: a step 791 of activating or maintaining material cutting parameters corresponding to the drill bit used and to the material identified, then a step 792 of measuring at least one gross load value after stabilization and engagement of the cutting edges of the drill bit in the material: for this, the drill bit is driven on a first drilling stroke, for example of the order of 0.2 millimeters, at the end of which the cutting edges of the drill have again engaged the material and the load values are stabilized, then the measurement is carried out on a second predetermined drilling stroke for example between 0.5 and 1 millimeter; a step 793 of determining at least one load value representative of the cutting forces calculated as being equal to the subtraction, from the at least one gross load value measured in step 792, of the at least one load value representative of the overall drag determined in step 7904. The at least one load value representative of the cutting forces is compared by the controller to the standard interval of load value representative of the cutting forces recorded in the drill memory corresponding to the material identified during drilling (step 794 ). If the at least one load value representative of the calculated cutting forces does not belong to the load value interval representative of the cutting forces of the identified material (step 795), a potential anomaly exists. The drilling is then stopped (step 75), the drill retracted (step 76) and an alert sent (step 77) to the operator to indicate an anomaly such as the fact that the cutting edges of the drill are potentially degraded or the presence of adherent material or other defect. If the load value representative of the cutting forces is within the standard load value of the cutting forces of the identified material (step 796), no anomaly is detected and drilling continues until 'that entry into another material is detected (step 80). This step 80 of detection of the entry of the drill into a new material during drilling is also called step of detection of change of material. This step 80 of material change detection comprises: a step 800 of determining at least one load value representative of the cutting forces corresponding to the subtraction from the at least one gross load value measured in real time during the movement of the drill bit in the material being drilled from the at least one load value representative of the overall drag measured in step 7904; a step 801 of verifying the presence of the calculated value of the at least one item of information representative of the load representative of the cutting forces within the predetermined standard interval of load value representative of the cutting forces of the last identified material corresponding to the drill used, a step 802 of detecting the entry of the drill into a new material when the calculated value of the at least one load representative of the cutting forces of the last identified material is no longer within the standard interval predetermined load value representative of the cutting forces of this material; a step 803 of detecting the absence of change in material when the calculated value of the at least one load representative of the cutting forces of the last identified material remains within the predetermined standard interval of representative load value cutting efforts of this material. If no material change is detected (step 803), the drilling process continues until a material change is detected. If a new material is detected (step 802), new steps 73 for checking the friction of the strips then 78 for determining the material during drilling. When, during the implementation of a step 78 of determining the material being drilled, the material being drilled identified is the outlet air, the drilling continues over a predetermined stroke, for example of 3 millimeters (step 81). At the end of this race, the drill is raised (step 82) and a drill hole alert is sent to the operator (step 83). 6.2.3. Variants In a variant, the approach phase of the drill bit in the approach air towards the element to be drilled can be preceded by a possible detection that the drill bit is indeed in the approach air: applying the reference parameters from the start of the drilling cycle; by calculating at least one load value representative of the cutting forces; by checking that the at least one load value representative of the cutting forces is indeed within the standard interval of reference load value representative of the cutting forces, the drill being in the approach air if the at least a calculated load value representative of the cutting forces is well within the corresponding standard interval. 6.2.4. Other applications More generally, the invention relates to a method for piercing an element to be pierced by means of a piercing device and a cutting tool comprising strips and cutting edges, said method comprising a step of determining at least one load value representative of the overall drag due to the internal friction of said piercing device and to the friction of said strips in said element to be drilled, this step comprising the following sub-steps: stopping said drilling operation; receding said cutting tool over a predetermined distance; driving said cutting tool with predetermined cutting parameters; measuring at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled, and after stabilization of said load values, said at least one measured load value being representative of said overall drag. According to a variant, the method comprises a step of determining at least one load value representative of the drag of the listels due to the friction of said listels in said element to be drilled, this step comprising the following substeps: determining at least one load value representative of the drag of said piercing device due to the internal friction of said piercing device operating with said predetermined cutting parameters; the subtraction, from said at least one load value representative of the overall drag, of said at least one load value representative of the drag of said piercing device, the result of said subtraction being equal to said at least one representative load value of the listel trail. According to another variant, the method comprises a step of determining at least one load value representative of the cutting forces generated by the removal of material from said element to be drilled during a drilling operation, comprising the sub-steps following: measuring at least one load value during the drilling of said element to be drilled with said predetermined cutting parameters; subtracting, from said at least one load value measured during the drilling of said element to be drilled, from said at least one load value representative of said overall drag. The invention therefore relates to a method making it possible, during drilling, to measure at least one load value representative of the overall drag of a drill and of the strips of the drill placed at the end of its spindle, and optionally: at least one load value representative of the drag of the strips against the walls of an element to be drilled, and / or at least one load value representative of the cutting forces. Such information can be used in various applications other than that of making the determination of a newly encountered material more reliable, as is the case with the embodiment which has just been described. The friction of the strips can be taken into consideration for example to detect a bad chip evacuation (jamming) or the tightening of material on drill, The cutting forces can be taken into account for example to detect wear of the cutting edges of a drill, an adherent material. In each of the applications, thresholds will be predetermined in the laboratory for each material and each type of drill from reaching which a poor evacuation of the chip, a tightening of the material, wear of the drill, an adherent material is detected. In production, exceeding these thresholds will correspond respectively to the detection of poor chip evacuation, tightening of the material, wear of the drill bit, of an adherent material. Of course, this list of applications is not exhaustive. The various parameters mentioned above may be taken into account in the context of other applications. APPENDICES Towards step 72 1/5 2/5 Around 73 3/5 To step 75 _ - Verification of cutting forces 794 - Comparison of the at least one load value representative of the cutting forces with the standard interval of load value representative of the cutting forces of the material identified 796 - At leasta charge valuerepresentative of the cutting forces determined in step 793 belongs to the standard intervalload value 795 - At leasta charge valuerepresentative of the cutting forces determined in step 793 does not belong to the load value interval representative of the representative of cutting efforts cutting efforts matter matter identified: identified anomaly potential ψ To step 80 4/5 To step 73 5/5
权利要求:
Claims (26) [1" id="c-fr-0001] 1. A method of piercing an element to be pierced by means of a piercing device and a cutting tool comprising strips and cutting edges, said method comprising a step of determining at least one load value representative of the overall drag due to the internal friction of said piercing device and to the friction of said strips in said element to be drilled, this step comprising the following sub-steps: stopping said drilling operation; receding said cutting tool over a predetermined distance; driving said cutting tool with predetermined cutting parameters; measuring at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled, and after stabilization of said load values, said at least one measured load value being representative of said overall drag. [2" id="c-fr-0002] 2. Method according to claim 1 comprising a step of determining at least one load value representative of the drag of the listels due to the friction of said listels in said element to be drilled, this step comprising the following substeps: determining at least one load value representative of the drag of said piercing device due to the internal friction of said piercing device operating with said predetermined cutting parameters; the subtraction, from said at least one load value representative of the overall drag, of said at least one load value representative of the drag of said piercing device, the result of said subtraction being equal to said at least one representative load value of the listel trail. [3" id="c-fr-0003] 3. Method according to claim according to claim 1 or 2 comprising a step of determining at least one load value representative of the cutting forces generated by the removal of material from said element to be drilled during a drilling operation, including the following sub-steps: measuring at least one load value during the drilling of said element to be drilled with said predetermined cutting parameters; subtraction from said at least one load value measured during the drilling of said element to be drilled of said at least one load value representative of said overall drag, the result of said subtraction being equal to said at least one representative load value cutting forces. [4" id="c-fr-0004] 4. The method of claim 3 wherein said predetermined cutting parameters are reference cutting parameters specific to the group of materials to which the material being drilled and the type of drill used to perform the drilling operation in course, said method comprising a step of comparing said at least one load value representative of the cutting forces with predetermined intervals of reference load value representative of the cutting forces, each of said intervals being specific to one of the materials of said group. [5" id="c-fr-0005] 5. Method according to claim 4 comprising a step of stopping the drilling operation in progress and / or issuing an alert signal when said at least one load value representative of the cutting forces does not belong at none of said reference load value intervals representative of the cutting forces. [6" id="c-fr-0006] 6. Method according to claim 2, comprising a step of verifying the friction of said listels comprising: comparing said at least one load value representative of the drag of the listels with a predetermined threshold value; detecting an abnormal friction of said strips when said at least one load value representative of the drag of the strips becomes greater than said predetermined threshold value. [7" id="c-fr-0007] 7. The method of claim 6 comprising a step of cleaning when it is detected that the friction of the strips is abnormal. [8" id="c-fr-0008] 8. The method of claim 3 wherein said predetermined cutting parameters are predetermined material cutting parameters specific to the material being drilled and the type of drill used to perform the drilling operation in progress, said method comprising a step of verifying the cutting forces comprising comparing said at least one load value representative of the cutting forces with a standard interval of predetermined material cutting load values specific to the material being drilled for a drill whose edges cutters have the minimum quality required for correct drilling and for said predetermined material cutting parameters. [9" id="c-fr-0009] 9. The method of claim 8, wherein said step of checking the cutting forces comprises detecting anomalous cutting forces when said at least one load value representative of the cutting forces is not included in said standard interval of material cutting load values. [10" id="c-fr-0010] 10. Method according to claims 3, 4 and 8, comprising a step of identifying the material being drilled, said identification step comprising: a step of activating or maintaining the reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress; a step of determining the material being drilled, said material being drilled being that in which the range of value of reference loads representative of the cutting forces contains said at least one load value representative of the cutting forces; a step of activating predetermined material cutting parameters specific to the material identified in said determining step and to the type of drill used; a step of determining at least one load value representative of the cutting forces with said material cutting parameters; a step of validating the material identified during said determining step, said determination of the material being validated when the at least one load value representative of the cutting forces, determined by implementing said material cutting parameters, belongs at a range of load values representative of the predetermined cutting forces with said material cutting parameters for the identified material. [11" id="c-fr-0011] 11. The method of claim 9 or 10 comprising a step of stopping said drilling when it is detected that the cutting forces are abnormal or that no material is identified. [12" id="c-fr-0012] 12. Method according to any one of claims 6 to 11 comprising a step of transmitting an alert signal when it is detected that the friction of the strips is abnormal and / or when it is detected that the efforts of cut are abnormal and / or that no material is identified. [13" id="c-fr-0013] 13. Drilling device intended to be used to carry out at least one drilling operation of an element to be drilled by means of a cutting tool comprising strips and cutting edges, said device comprising means for determining the '' at least one load value representative of the overall drag due to the internal friction of said piercing device and to the friction of said strips in said element to be drilled, these determination means comprising: means for stopping said drilling operation; means for reversing said cutting tool over a predetermined distance; means for driving said cutting tool with predetermined cutting parameters; means for measuring at least one load value during the training of said cutting tool with said cutting parameters before its cutting edges again come into contact with said element to be drilled, and after stabilization of said values load, said at least one measured load value being representative of said overall drag. [14" id="c-fr-0014] 14. Device according to claim 13 comprising means for determining at least one load value representative of the drag of the strips due to the friction of said strips in said element to be drilled, these means comprising: means for determining at least one load value representative of the drag of said piercing device due to the internal friction of said piercing device operating with said predetermined cutting parameters; means for subtracting said at least one load value representative of the overall drag from said at least one load value representative of the drag of said piercing device, the result of said subtraction being equal to said at least one value of load representative of the listell trail. [15" id="c-fr-0015] 15. Device according to claim according to claim 13 or 14 comprising means for determining at least one load value representative of the cutting forces generated by the removal of material from said element to be drilled during a drilling operation, these means including: means for measuring at least one load value during the drilling of said element to be drilled with said predetermined cutting parameters; means for subtracting, from said at least one load value measured during the drilling of said element to be drilled, from said at least one load value representative of said overall drag, the result of said subtraction being equal to said at least one value load representative of the cutting forces. [16" id="c-fr-0016] 16. Device according to claim 15, in which said predetermined cutting parameters are reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in course, said device comprising means for comparing said at least one load value representative of the cutting forces with predetermined intervals of reference load value representative of the cutting forces, each of said intervals being specific to one of the materials of said group. [17" id="c-fr-0017] 17. Device according to claim 16 comprising means for stopping the drilling operation in progress and / or for emitting an alert signal when said at least one load value representative of the cutting forces does not belong at none of said reference load value intervals representative of the cutting forces. [18" id="c-fr-0018] 18. Device according to claim 14, comprising means for checking the friction of said strips comprising: means for comparing said at least one load value representative of the drag of the listels with a predetermined threshold value; means for detecting an abnormal friction of said strips when said at least one load value representative of the drag of the strips becomes greater than said predetermined threshold value. [19" id="c-fr-0019] 19. Device according to claim 18 comprising means for controlling a cleaning when it is detected that the friction of the strips is abnormal. [20" id="c-fr-0020] 20. Device according to claim 15, in which said predetermined cutting parameters are predetermined material cutting parameters specific to the material being drilled and to the type of drill used to carry out the drilling operation in progress, said device comprising means for checking the cutting forces comprising means for comparing said at least one load value representative of the cutting forces with a standard interval of predetermined material cutting load values specific to the material being drilled for a drill, the cutting edges have the minimum quality required for correct drilling and for said predetermined material cutting parameters. [21" id="c-fr-0021] 21. Device according to claim 20 comprising means for detecting anomalous cutting forces when said at least one load value representative of the cutting forces is not included in said standard range of material cutting load values. [22" id="c-fr-0022] 22. Device according to claims 15, 16 and 21, comprising means for identifying the material being drilled, said identification means comprising: means for activating or maintaining the reference cutting parameters specific to the group of materials to which the material being drilled belongs and to the type of drill used to carry out the drilling operation in progress; means for determining the material being drilled, said material being drilled being that in which the range of reference load values representative of the cutting forces contains said at least one load value representative of the cutting forces; means for activating predetermined material cutting parameters specific to the material identified in said determination step and to the type of drill used; means for determining at least one load value representative of the cutting forces with said material cutting parameters; means for validating the material identified during said determination step, said determination of the material being validated when the at least one load value representative of the cutting forces, determined by implementing said material cutting parameters, belongs at a range of load values representative of the predetermined cutting forces with said material cutting parameters for the identified material. [23" id="c-fr-0023] 23. Device according to claim 21 or 22 comprising means for stopping said drilling operation when it is detected that the cutting forces are abnormal or that no material is identified. [24" id="c-fr-0024] 24. Device according to any one of claims 18 to 23 comprising means for transmitting an alert signal when it is detected that the friction of the strips is abnormal and / or when it is detected that the efforts of cut are abnormal and / or that no material is identified. [25" id="c-fr-0025] 25. A computer program comprising program code instructions for executing the steps of the drilling method according to any one of claims 1 to 12, when said program is executed by a processor. [26" id="c-fr-0026] 26. A recording medium readable by a computer on which is recorded a computer program comprising program code instructions for the execution of the steps of the drilling method according to any one of claims 1 to 12, when said program is executed by a processor. 303 17 16 411 4303 130 134
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同族专利:
公开号 | 公开日 EP3318940A1|2018-05-09| EP3318940B1|2021-04-14| FR3058342B1|2021-01-01| US20180126509A1|2018-05-10| US10532438B2|2020-01-14|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题 US4451187A|1981-02-18|1984-05-29|Brother Kogyo Kabushiki Kaisha|Machine tool| US4854786A|1988-05-26|1989-08-08|Allen-Bradley Company, Inc.|Computer controlled automatic shift drill| EP1618978A1|2004-07-23|2006-01-25|Cooper Power Tools SAS|Machine tool with mechanical advance allowing a jam clearing of chips| EP1982783A1|2007-04-17|2008-10-22|Cooper Power Tools SAS|Machining machine|FR3089440A1|2018-12-10|2020-06-12|Seti-Tec|Automatic drilling device with automatically disengaging vibratory advance means|JPS626926B2|1980-10-30|1987-02-14|Brother Ind Ltd| JPH02237741A|1989-03-10|1990-09-20|Brother Ind Ltd|Control device for machine tool| JP4662104B2|2001-06-18|2011-03-30|株式会社アマダ|Drilling device| US8277154B2|2008-05-30|2012-10-02|The Boeing Company|Adaptive thrust sensor drilling| US8317437B2|2008-08-01|2012-11-27|The Boeing Company|Adaptive positive feed drilling system| JP5622463B2|2010-07-09|2014-11-12|株式会社スギノマシン|Drilling control method and drilling apparatus| DE102012222580A1|2011-12-31|2013-07-04|Frank Rinn|Method for drill resistance measurement for testing of material, such as wood, plastics, flooring or sandstone, by electronic controller, involves adjusting penetration rate by continuously adaptive speed change of feed drive| US9395316B2|2012-02-09|2016-07-19|Frank Rinn|Method and apparatus for testing of materials| FR3000693B1|2013-01-09|2015-06-19|Seti Tec|BIMOTER DRILL WITH CONTROLLED ADVANCE SPEED| EP3187291A1|2015-12-29|2017-07-05|Airbus Defence and Space, S.A.U.|Electrical portable drilling machine|US20190257208A1|2018-02-20|2019-08-22|Novatek Ip, Llc|Unitary Turbine Blade and Method of Manufacture Thereof| DE102018118001A1|2018-07-25|2020-01-30|Michael Zwerger|Method for monitoring a machine tool, monitoring device and computer program product| EP3696632A1|2019-02-15|2020-08-19|Siemens Aktiengesellschaft|Method for operating a numerically controlled production machine and a corresponding numerical controller| US11219978B2|2020-02-26|2022-01-11|Ritesafety Products Int'l, Llc|Utility knife with a replacement blade and a system and method for determining the end of life of the blade|
法律状态:
2017-11-28| PLFP| Fee payment|Year of fee payment: 2 | 2018-05-11| PLSC| Publication of the preliminary search report|Effective date: 20180511 | 2019-11-26| PLFP| Fee payment|Year of fee payment: 4 | 2020-11-27| PLFP| Fee payment|Year of fee payment: 5 | 2021-11-25| PLFP| Fee payment|Year of fee payment: 6 |
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申请号 | 申请日 | 专利标题 FR1660715A|FR3058342B1|2016-11-04|2016-11-04|DRILLING PROCESS INCLUDING A TRAIL MEASURE , AND CORRESPONDING DRILLING DEVICE| FR1660715|2016-11-04|FR1660715A| FR3058342B1|2016-11-04|2016-11-04|DRILLING PROCESS INCLUDING A TRAIL MEASURE , AND CORRESPONDING DRILLING DEVICE| EP17199858.6A| EP3318940B1|2016-11-04|2017-11-03|Drilling method comprising a measurement of drag, and corresponding piercing device| US15/804,499| US10532438B2|2016-11-04|2017-11-06|Drilling device and method for adjusting cutting operational parameters during drilling of a multilayer element| 相关专利
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