• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a production plant (1), in particular for the folding of workpieces (2) to be produced from sheet metal, comprising a bending press (3), in particular a press brake, with pressing bars (13, 16), at least one bending tool (4) Bending punch (5) and bending die (6) which is connected to the pressing bars (13, 16) and at least one angle detecting device (46) for determining an angular position of at least one limb (35, 36) of the workpiece (2) formed by a bending operation. with respect to a reference plane (41, 42). In this case, the angle detection device (46) comprises at least one inclination sensor (39) having a reference surface (40) and the inclination sensor (39) with the reference surface (40) on a surface portion of at least one of the legs (35, 36) of the workpiece (2 ) can be applied by the angle detection device (46).
    公开号:AT512282A4
    申请号:T692/2012
    申请日:2012-06-18
    公开日:2013-07-15
    发明作者:
    申请人:Trumpf Maschinen Austria Gmbh；
    IPC主号:
    专利说明:

    25 14:29:35 18-06-2012 • · · · »
    1
    The invention relates to a production plant, in particular for the folding of workpieces to be machined from sheet metal, with an angle detection device and a method for determining an angular position of at least one leg formed by a bending process with respect to a reference plane, as described in claims 1 and 12 ,
    From EP 0 637 371 B1 or the DE 69411 821 T2 resulting therefrom, a device for measuring an angle on a workpiece has become known, in which sensors are provided in a base body of the bending tool, which are movable relative to the base body. Each of the probes has contact means for contacting the respective portion of the workpiece during the measurement, the probes being kinematically completely independent of each other. Furthermore, the apparatus has its own pressure means to bring the contact means of the probes into contact with the respective portions of the workpiece which is being measured. In this case, the pressure devices which are zugeondnet a sensor, completely independent of the pressure means, which are assigned to the respective other sensor. Furthermore, the pressure device allow the respective sensor to carry out a translatory movement relative to the main body completely and independently of the movement of the other probe. In addition, a sensor device is provided which serves to detect the position of the sensor relative to the base body. Each of the sensors has an active surface for the contact with the respective section of the workpiece. The sensor device in turn has a pair of distance measuring elements which are spaced apart from each other by a known distance and lie in a plane of the angle to be measured, the measuring elements having two different points with the movable probe N2D11 / 37300 / ni / onio 14-qo Mr · Bß / MD nncynQ7 25 14:30:15 18-06-2012 6/37 * * ♦ ♦ • · »· ·
    2 • * · · · • · m · · • · > ι «are connected. Thus, a pair of these probes and the associated measuring elements are disposed within the body on which the workpiece is supported during its manufacture.
    Further bending angle measurements have hitherto been realized by means of digital image processing, distance sensors, light section sensors, measuring pins, measuring forks, rotatable die elements, Taslscheiben or the like.
    These measuring devices are constructed for the most part complicated and have a considerable susceptibility to interference.
    The object of the invention is to provide an easy-to-use and, above all, precisely measuring angle measuring device for workpieces to be produced from metal sheets for the operator.
    This object of the invention is solved by the features of claim 1. The advantage resulting from the features of claim 1 lies in the fact that the inclination measurement takes place directly on at least one of the legs of the workpiece, wherein the actual angular position of the respective leg is determined with respect to the preferably vertical or horizontal reference plane contained within the inclination sensor itself can be based on this measurement value as close as possible to a predetermined bending angle to allow. The inclination sensor as an electrical sensor element thereby supplies a further processable, in particular electrical, measurement signal which can be evaluated by means of a control device, which in particular can also be formed by the control of the bending press. A microelectronic structure of the tilt sensor allows, for example, a Winkeimessauflösung of about 0.001 ° and a repeat accuracy of about 0.01 °, despite very small external dimensions of a few millimeters, which is not sufficient for purposes of bending accuracy. Such measurement accuracies are not possible with the known angle measuring devices or only with very complex embodiments. N2011 / 37300 / n0 / omo λα · **** tl ·. οίλλ n nnu mm 25 14:30:56 18-06-2012 7/37 • · · ·· * * II · »« ··············································································· « • · · * · · · I · «·« «· ** ····· * · 3
    Be! a manufacturing device according to the invention, the corresponding angle days can be determined quickly and safely, the determined angle can be used in different ways depending on the time of the measurement implementation. For this purpose, the inclination sensor at the time of the desired angle determination manually or automatically applied to the workpiece and may optionally also be held adjacent to the leg during the bending deformation. By a corresponding mounting of the inclination sensor in the angle detection device, a safe and simple determination of the angle and based on the bending angle can be performed. Due to the flat contact of the inclination sensor with its reference surface on a surface portion of the sheet so low surface inaccuracies and concomitant measurement errors can be better compensated. However, apart from the production plant, this also entails the removal of mostly larger measuring devices, such as those required for optical measuring systems. But this can also be the interference influence of tools or the like. Reduced, as has often occurred in conventional measurement methods
    The angle between two legs of a workpiece resulting after a partially completed or completed bending operation can be determined by a single measurement, e.g. by applying a leg to a plane of known angular position, e.g. a horizontal bearing surface, and then the angular position of the second leg is measured by means of the tilt sensor. Alternatively, the angular positions of both legs can each be measured by means of a tilt sensor, wherein no contact surface must be present.
    The angle measurement can be measured during a bending process, so long as still forming forces acting on the workpiece or even in a relaxed condition of the workpiece, whereby an actually achieved bending angle can be determined taking into account the elastic recoil. 18/06/2012 14:33
    No .: R344 N I111 / 37300 P.007 / 037 2S 14:31:38 18-06-2012 8/37 «· · * *» I · # * · »• * · · · · · # · · ·· Μ »·
    ** * · 4
    The measurement may e.g. even when the bending process is interrupted, a desired bending angle expected on the basis of the workpiece properties and the set values of the bending press is compared with the measured actual bending angle and based on detected deviations of the forming behavior the remaining bending process can be carried out with corrected setting values. Thereby, e.g. Despite fluctuations in material properties such as sheet thickness, mating limit, etc. consistently accurate bending results can be achieved.
    Of course, the angle measurement can be carried out even after completion of a bending operation, whereby e.g. the deformation behavior of a batch of material for several identical workpieces is determined on a sample workpiece and based on the bending parameters of the press brake can be adjusted.
    The angle measuring device of the production line can even be used to measure workpieces that have been bent on another bending press or, for example, Another advantage of the invention is also a further embodiment according to claim 2, since sufficient measuring accuracy can already be achieved with a relatively low outlay on the sensor. However, it is important to pay attention to an exact alignment of the sensor with its measuring direction with respect to the bending line of the workpiece to be produced from the metal sheet.
    Another advantage is an embodiment according to claim 3, since so the operation and especially on the arrangement of the inclination sensor on the surface portion of the sheet with respect to the measuring direction no high requirement with respect to their orientation must be made. This is made possible by the biaxial angular orientation of the inclination sensor. Twistings of the adjacent inclination sensor within the reference surface can thereby be eliminated mathematically
    Also advantageous is a development according to claim 4, since the measuring device, in particular the angle detection device formed therefrom, has a number of N2011 / 37300 10 // 1/5/9019 iyi-9 / l Up · D9 / 14 d nno / nov 14:32: 19 18-06-2012 9/37 25 · · · · · · · · · · · · · · 5 5 5 5 5 5 5 5 5 5 5. 5
    Sensors may comprise, of which each of the individual sensors covers a partial measuring range of the total possible measuring range. Thus, the measurement accuracy can be increased by dividing the total measuring range into individual partial measuring ranges. Especially when the individual directly behind each other provided Teilmessbereiche overlap each other. The individual sensors can be used in each case in the range of their highest measurement accuracy.
    Due to the construction according to claim 5, it is possible to provide a tilt sensor that provides very accurate measurements with high precision and reliability and minimum space requirement. Dimensions of the approximately square inclination sensor with less than 10 mm edge length are possible.
    The inclination sensor can be applied to the Schenket to be measured already before the start of the bending process, whereby the bending process can be monitored from the beginning by a measured value determination. By far, an exact difference angle between the starting days and the end position can be determined.
    According to another embodiment, it is possible to perform a post-control of the bending result by a measurement after completion of the bending process. Thus, after removal of the shaping compressive force of the bending tool and the optionally associated springback of the legs, a corresponding correction can be carried out without additional handling effort on the workpiece. This makes it possible, for example, to react more quickly to changing material qualities, since an exact control of the bending angle is always possible with each of the workpieces.
    The angle detecting device with the tilt sensor according to claim 6 may be disposed immediately adjacent to the bending tool of the bending press, whereby a direct accompanying measurement of a bending operation performed by the bending press is possible N2011 / 37300 -iss / nftyonio i / i-tr nr · pß / i / i 14:32:59 18-06-2012 10/37 25 ··· * · · * · · · ♦ · · * * * * * * · ♦ # «· · · · ·« Mf «··· · * ···· Ψ * · «« «« 9 · * 6
    However, it is also possible to arrange the Winkelerfassungsvomchtung according to claim 7 distanced from the bending tools, which although a workpiece transfer within the manufacturing plant is required to perform angle measurements, but it can be measured during the bending of a workpiece in the bending press another workpiece.
    Also advantageous is still an embodiment according to claim 8, since the risk of injury to the operator can be further reduced, since a manual positioning of the tilt sensor is eliminated. By needs-se stationary support directly on the sheet to be deformed can be dispensed so even on complicated additional equipment parts. In addition, the measurement accuracy can also be improved.
    Also advantageous is a development according to claim 9, since an exact, fitting support of the inclination sensor on the surface portion of the leg is possible with a variety of means. This can be taken into account depending on the selected holding means on the respective material to be processed of the sheet or even on the surface condition.
    According to another embodiment variant according to claim 10, it becomes possible to simplify the application process of the sensor in each bending operation, since the inclination sensor is arranged immediately adjacent to the working plane, but in the direction of the depth to distanced. This can also be carried out a perfect measurement without additional manipulations are necessary. This can save assembly time and also the operating safety can be increased.
    In the embodiment according to claim 11, it is advantageous that an even more exact determination of the included bending angle between the legs is made possible. This is because on both legs the exact, angular position can be determined and so the actual bending wedge! can be calculated or determined very accurately. N2011 / 37300 1P / nft / 9M9 No Vt ^ AA D fll fW ΛΊ7 25 14:33:39 18-06-2012 11/37 ** ··
    7
    The object of the invention is, however, independently solved by a method for determining an angular position of at least one leg formed by the bending operation with respect to a reference plane according to the features indicated in claim 12. The advantages resulting from the combination of features of the characterizing part of this claim are that the inclination measurement takes place directly on at least one of the legs of the workpiece, wherein the actual angular position of the respective leg with respect to the provided reference plane can be determined here. Thus, at least at the completion of the bending process always the corresponding angular position can be determined quickly and safely, since the inclination sensor at the time of the desired angle determination on the workpiece adjacent thereto and optionally also held stationary and so a safe and simple determination can be performed. As a result, the bending operation, in particular the mutual adjustment of the bending tools, can be automated as a result, since reliable measured value determination in the immediate vicinity of the bending line can always be carried out at a safe distance from it. Due to the flat contact of the inclination sensor with its reference surface on a surface portion of the sheet so low surface inaccuracies and concomitant measurement errors can be better compensated. In addition to the production plant, however, additional measuring devices, which are usually more extensive, usually become more expensive, as are required for optical measuring systems. But this can also be the interference influence of tools or the like. Reduced, as has often occurred in conventional measurement methods.
    Furthermore, an approach according to the features specified in claim 13 is advantageous because sufficient measurement accuracy can already be achieved with a relatively low outlay on the sensor. However, it is important to pay attention to an exact alignment of the sensor with its measuring direction with respect to the bending line of the workpiece to be produced from the metal sheet.
    A further advantageous procedure is described in claim 14, whereby the operation and especially the arrangement of the inclination sensor 18/06/2012 14:36
    No .: R344 P.011 / 037 25 14:34:24 18-06-2012 12/37 • f Φ · ΦΦ Φ φ · * Φ 4 · • * Φ · Φ · * • Φ * · ΦΦΦ Φ Φ « Φ · Φ ·· Φ Φ Φ * Φ # Φ φ f f «Φ * Φ Φ Φ Φ * 8 at the surface portion of the sheet with respect to the measuring direction is not required to be so high in alignment. This is made possible by the biaxial angular detection of the tilt sensor.
    Also advantageous is a variant of the method according to claim 15, because it is thus possible to provide a tilt sensor that provides very accurate measurements with high precision and reliability and minimum space requirement.
    Also advantageous is a procedure according to claim 16, since it is ready to perform a measured value determination from the beginning of the bending process and monitoring of the bending process can be carried out. As a result, an exact difference angle between the starting days and the end position can be determined.
    Another advantageous procedure is described in claim 17, since so the risk of injury to the operator can be further reduced. By the need for stationary Hafterung directly on the sheet to be deformed can be dispensed so even on complicated additional Anlagenteiie. In addition, the measurement accuracy can also be improved.
    Furthermore, a procedure according to the features specified in claim 18 is advantageous because so additionally also errors in the installation of the machine or the orientation of the sheet determined before performing the bending operation and can be taken into account in the further calculation or collection of the bending angle ,
    A further advantageous Verfahrenswelse is described in claim 19, because as well as a follow-up of the bending result can be performed. Thus, after removal of the shaping compressive force of Biegeweikzeugs and possibly associated with springback of the legs equal to a corresponding correction without additional Hantierungsaulwand can be performed on the workpiece. This makes it possible, for example, to react more quickly to changing material qualities, since an exact control of the bending angle is always possible with each of the workpieces to be produced. N201U37300 1f / nfii9fl19 1/137 Mr Q'iAA D niO / OQ7 25 14:35:05 18-06-2012 13/37 * · ·· t · Μ · · · · mt «· t · ·» t * • i «· ··· · · t · · · · * * ·« · · · ··· * Θ
    Finally, however, a variant of the method according to claim 20 is also advantageous, because in this way an even more exact determination of the included bending angle between the legs is made possible. This is because the exact, angular position can be determined on both legs and thus the actual bending angle can be calculated or determined very precisely.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures
    Each shows in a highly schematically simplified representation:
    1 shows a manufacturing unit with a workpiece deformed by a bending press and a tilt sensor of a measuring arrangement arranged on a leg, in a view;
    Fig. 2 shows the system of Figure 1, in side view.
    Fig. 3 is an enlarged detail view of the workpiece of Figure 2 in the bending tool.
    4 shows a perspective view of a tilt sensor of the measuring arrangement arranged on a leg;
    5 shows a partial area of the production facility with a different arrangement and option of inclination sensors, before the start of the bending process, in a side view;
    Fig. 6 shows the portion of FIG. 5, during the bending and measuring process, in side view
    By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. on N2011 / 37300 1R / nfi / 9ni7 1 A · "2R Nr Ü'iAA D /> 19/097 25 14:35:41 18-06-2012 14/37 ♦ • ♦ ► The immediately described and illustrated figure and related to a change in position mutatis mutandis to be transferred to the new situation ♦ ···.
    In Figs. 1 and 2, a manufacturing plant 1 is shown in highly simplified schematic representation, which is formed in the present case for the free bending of sheet metal to be produced workpieces 2 by means of swaging. But it would also be possible to use a folding machine in the manufacturing plant 1 to carry out the bending process.
    The production plant 1 used for bending in the present case comprises a bending press 3, in particular a press brake or press brake, for producing the workpieces 2 or workpieces between bending tools 4 which are adjustable relative to one another, such as bending punch 5 and bending die 6.
    A machine gesture FI 7 of the bending press 3 consists for example of a base plate 8 on the vertically upstanding, spaced apart and parallel to each other aligned side cheeks 9,10 are arranged. These are preferably connected to each other by a solid, formed for example from a Blechfomnteil cross-member 11 at their distance from the bottom plate 8 end portions.
    The side cheeks 9, 10 are approximately C-shaped to form a clearance for the uniforming of the workpiece 2, wherein a fixed, in particular on the bottom plate 8 upstanding pressing beam 13 is attached to Frontstimflächen 12 of bottom flanges of the side cheeks 9.10. This stationary arranged and fixed pressing beam 13 may also be referred to as a press table, are arranged on the parts of the bending tool 4 and also held. At Frontstimflächen 14 of the bottom plate 8 remote leg is in linear guides 15 a to the tabletop forming Pressbaiken 13 relatively adjustable further pressing beam 16, in particular a pressure bar, guided guided. On opposite, mutually parallel end faces 17,18 of the two pressing bars 13,16 tool holders 19,20 are arranged for assembly with the bending tools 4. The bending tool or tools 4 N2011 / 37300
    Mr · 09/1/1 D ΓΜ Λ / (107 25 25 15/37 14:36:23 16-06-2012 * »·· ♦ · ♦ * · · · * ···· · # *» 11 also be supported with the interposition of an adapter not shown on the tool holders 19,20.
    The bending press 3 shown has as drive arrangement 21 for the adjustable pressing beam 16, namely the pressure beam, e.g. two powered by electric energy drive means 22, which are conductively connected to a fed from a power grid 23 control device 24. By way of example, the operation of the bending press 3 is controlled via an input terminal 25 connected to the control device 24.
    The drive means 22 are preferably motorized spindle drives 26, as they are generally known, of which adjusting means 27 for a reversible actuating movement of the upper beam formed by the pressure bar 16 with this, for example, are drive-connected.
    Further details required for the operation of such a bending press 3, such as safety devices, stop arrangements and control devices, are omitted from the description in order to avoid an unnecessary length of the description
    Furthermore, the manufacturing apparatus 1 can also comprise a manipulator 28 shown here in simplified form in FIG. 2, which extracts at least a portion from a schematically indicated supply stack 29 of sheets to be deformed or folded and spends it into the working area of the bending press 3. The manipulator 28, in turn, comprises a gripped tongs 30 which are in turn gripped and which in turn has gripping fingers 31, 32. The gripping fingers 31, 32 each have clamping surfaces on the side facing the workpiece 2 to be produced. By a corresponding pivoting of the two gripping fingers 31,32 against each other and applying a sufficient clamping force, the sheet or the workpiece to be produced 2 is held by the manipulator 28 and moved accordingly positioned and positioned on the interaction of the clamping surfaces. With the gripping fingers 31, 32 of the gripper 30 is a corresponding gripping and later ensured due to the clamping movement sufficient support for the workpiece to be produced from the sheet 2.
    I ö n 9 9 9 · · · · · · ί ί ί ί ί ί ί ί N N 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 25 · 4 * * • * ♦ 4 II »* 4» • * * ♦ ····· »» «« ♦ · * »
    Furthermore, it is shown here in simplified form that the two pressing bars 13, 16, in particular their tool holders 19, 20 or the bending tool 4 held thereon with its bending punch 5 and bending die 6, when viewed in the longitudinal direction of the pressing bars 13, 16, are located between them define extending work plane 33. The working plane 33 preferably runs centrally with respect to the press beams 13, 16 or the tool holders 19, 20 arranged thereon. In the present exemplary embodiment, a vertically oriented plane is understood here in which a bending region 34 defined by the bending tool 4 is also arranged or formed. Bending area 34 is understood to be that area which serves to form the workpiece 2 to be produced from the sheet metal which is still mostly undeformed, or to further process an already pre-formed workpiece 2, by forming at least one additional bending area 34.
    The bending region 34 lies mostly in the working plane 33 and is formed or defined by the cooperating components of the bending tool 4, namely the bending punch 5 and the bending die 6. The bending region 34 usually forms a preferably rectilinear bending line on the workpiece 2 to be produced, wherein on both sides of each of these legs 35, 36 form as a result of the bending process carried out. Depending on the desired or produced geometry of the workpiece 2, the two legs 35, 36 between them enter a bending angle 37 a. This bending angle 37 is measured in a reference plane 38 oriented perpendicularly with respect to the bending line, which in both FIGS. 1 and 2 is indicated. The reference plane 38, for its part, is furthermore preferably also aligned with respect to the working plane 33 in the vertical direction.
    Furthermore, in FIG. 2, in that leg 35 of the workpiece 2 to be produced, which here is facing the operating area of the bending press 3 or the manipulator 28, an angle detection device 50 is shown, which comprises a tilt sensor 39 and this for carrying out measurements movable stores. The tilt sensor 39 uses the direction of gravity to measure changes in angle with its built-in sensors
    II N2011 / 37300 lüinc iom o 1 λ · λιί μ - D1Λ Λ η m (Mπλ ·> 25 14:37:49 18-06-2012 17/37 ♦ · ** ··· ♦ «*» «* • ♦ * * * · · • • «« «« «« «« «« «· · · · · · · · · · · · · · · · · · · · · · · · In particular, the tilt sensor 39 as an electrical measuring element may in turn be connected to the control device 24 and / or the input terminal 25. A connection is made here Not only a cable connection by cables not shown in detail but also a wireless connection such as a radio link or the like understood This connection can also be done with an evaluation not shown and / or a computer unit, which or the measured values determined by the tilt sensor 39 erf Asst, optionally performs a conversion or a determination of an angle value and thus the further movement of the bending press 3 can be controlled with their bending tools 4, so that the predetermined bending angle 37 can be gestgestift on the workpiece 2.
    As indicated by dashed lines in FIG. 2, the angle detection device 46 may also be arranged at a distance from the bending tool 4, e.g. in the form of its own measuring station 47 within the production plant 1.
    FIG. 3 shows a detail of the wilting piece 2 according to FIGS. 1 and 2, a larger scale being chosen for this illustration. The broaching tool 4 is formed here by the bending punch 5 and the bending die 6. The bending step 5 shown here is carried out preferably by the free-bending process, wherein the working plane 33 is shown extending centrally with respect to the bending tool 4. The workpiece 2 shown in simplified form has its two legs 35, 36 on both sides of the working plane 33. In the present case, a symmetrical deformation of the two legs 35,36 with respect to the working plane 33 is effected by the symmetrical arrangement of the unspecified Biegegesenkflächen the bending die 6. The two legs 35,36 include the bending angle 37 between them.
    As also schematically indicated in FIG. 2, the inclination sensor 39 is disposed adjacent thereto at least on one of the legs 35, 36 of the workpiece 2 and is also fixedly held thereon. The neon (4201107300) / onio i / i- / in M r * D *> AA D 017 / ΛΟ7 25 14:38:33 18-06-2012 18/37 ·· ·· ·· · · ♦ # »·······················································« This reference surface 40 represents a type of base surface of the inclination sensor 39 which serves to abut against a surface portion of the surface of the sheet or of the workpiece 2 to be produced therefrom However, it would also be possible to provide an additional, but unspecified Hattevonichtung between the tilt sensor 39 and the surface portion of the sheet or workpiece 2. This is on the one hand on the surface portion of the sheet and is held there and on the other hand carries the tilt sensor 39th Die Holding device would be formed with plane-parallel aligned surfaces to an angle error in the measurement close or avoid a separate adjustment or calibration process.
    Here, the mostly planar sheet metal piece or even an already pre-bent or bent workpiece 2 is spent for further processing between the Biegeweri 4, so as to perform the werteren bending operation can. If the sheet to be machined or the workpiece 2 is positioned between the still separate bending tools 4, the inclination sensor 39 can be arranged on at least one of the legs 35, 36 as of this point in time. The inclination sensor 39 can be applied to at least one of the legs 35, 36 during the bending process or else only after the end of the bending process, and the measuring process can be carried out.
    If the inclination sensor 39 is already applied to at least one of the legs 35, 36 before the start of the bending operation, then it can be arranged on this surface section adjacent to or at least before or during the entire bending process. For the case described last, this means that the inclination sensor 39 follows the change in position of the leg 35, 36 to be formed and remains adjacent to this surface section starting from the undeformed starting days until reaching the end of the bending. Depending on the choice and design of the inclination sensor 39, a measured value is determined in order to be able to carry out the further determination of the angular position of at least one leg 35, 36 formed by the bending process with respect to a reference plane 41 and / or 42. Preferably, a fixed, adjacent support of the inclination sensor 39 at the surface portion 14201107300 io / nfi / omo ιλ · λλ M, - O'iAA D (HO ln07 25 14:39:18 18-06-2012 19/37 25 14:39: 18 18-06-2012 19/37 • * * • * • • • φ • · • ♦ * • • < '* * * ♦ · «• #« «« 15 so that it could be independent thereof may also be possible to press the inclination sensor 39 by means of a pivotable lever arrangement with the application of a spring force to the surface portion of the sheet.
    Depending on the orientation and mode of operation of the inclination sensor 39, the reference planes 41, 42 may have a different position or spatial direction relative to each other. Thus, for example, the reference plane 41 drawn here can be aligned parallel to the working plane 33 or in this running. Another possibility of the arrangement represents, for example, a machine plane, which is represented by the further, drawn reference plane 42. If the bending press 3 is in a totally horizontal orientation, in particular kn area of its workpiece or sheet support surface in the region of the bending tool 4, this reference plane 42 may also be aligned parallel to this. In this orientation of the bending press 3, the further reference plane 42 extends at an angle of 90 ° with respect to the working plane 33 and in a horizontal orientation.
    Independently or additionally, it would also still be possible, as shown for example in the region of the further leg 36, that a further tilt sensor 39 can also be arranged thereon, which is indicated here in dashed lines. Also, this inclination sensor 39 is fitting to carry out the measurement, in particular stationary, held on a surface portion of the sheet or the leg 35, 36 to be produced thereon.
    Thus, it may be possible to form the inclination sensor 39, for example, by a uniaxial inclination sensor. However, it is important to ensure that then an alignment of the tilt sensor or its measuring direction has to be done exactly. The measuring direction of the sensor is then aligned at right angles with respect to the bending line extending in the bending region 34. This axial direction is referred to in such presses with "z".
    If, on the other hand, the inclination sensor 39 is formed by a biaxial inclination sensor, it can span a measuring plane, for example by two measuring directions or measuring beams N2011 / 37300 1B / nR / 0ni9 ΛΑΛΑM r ·D iAA D nm inside 25 14:40:02 18-06-2012 20/37 ·· 99 99 '► 9 9 9 9 9 1 9 9 I 999 9 * 9 9 9 9 9 9 99 9 # 9 m 9 9 # 99 «9 16 defined is. In this case, this measuring plane spanned by the two measuring directions or measuring axes is aligned parallel to the reference surface 40 of the inclination sensor 39. Then an evaluation of two axes for determining the angular position is possible, in which case the alignment of the inclination sensor 39 with respect to the bending line does not have to be as exact as was necessary for the uniaxial inclination sensor 39 described above. However, it would still be possible to use a multi-axis inclination sensor which can detect angles with respect to more than two axes.
    In many of the inclination sensors, the inclination is measured from their reference surface 40 with respect to gravity - that is, in a vertical orientation. This makes it possible to be able to determine an angle of inclination 43, for example of the leg 35, with respect to the perpendicular base measuring direction of the tilt sensor 39 or the angle detection device. This is well known, with no further details here on the operation of the tilt sensor 39, in particular the angle detection device.
    Be particularly advantageous, it has been found that the tilt sensor 39, for example, based on the MEMS-Technoiogie The cooling MEMS means Micro-ElektroMechanisches system and are characterized such inclination sensors 39 by small dimensions down to a few millimeters.
    It would also be possible for the reference surface 40 to be associated with a plurality of differently oriented inclination sensors 39, whereby the angle detection device 46 has a total measuring range for inclination determination, and the total measuring range is subdivided into a plurality of, in particular overlapping, sub measuring ranges. Thus, the inclination sensor 39 forming the angle detection device 46 can also comprise a plurality of individual sensors, of which each of the individual sensors covers a partial measuring range of the total possible measuring range. Thus, the measurement accuracy can be increased by dividing the total measuring range into individual partial measuring ranges. Especially when the individual directly behind each other provided Teilmessbereiche overlap each other. N2011 / 37300 ip / nss / omo λα λ'χ llr DO / l / 1 d nonmoi 25 14:40:45 18-06-2012 21/37 • 9 • • • • • • • • • • • • • • 9 t • • • • • * 9 • • e ♦ 9 9 • • * • • 9 * 9 17
    The inclination sensor 39 or the inclination sensors 39 forming the angle detection device can also remain stationary on the leg or legs 35, 36 even after completion of the bending operation, and preferably remain stationary until the springback of the legs fails to occur the applied bending force during the bending process is carried out at least for the most part, so as to be able to accurately determine the actual bending angle 37, which is enclosed for example between the legs 35, 36. This determination can for example be made such that after the bending process, the bending tool 4 is opened so far that the two legs 35,36 are held without applying a compressive force or bending force between the bending tool 4 and then in this deformed position at least on one of the legs 35th , 36 of the workpiece to be produced 2 of the inclination angle 43 is determined. By appropriate calculation can then be determined arithmetically, for example, when using two inclination sensors 39 of the bending angle 37.
    The inclination sensors 39 arranged on the limb (s) 35, 36 can be held thereon with the most diverse holding means on the respective surface section of the sheet metal or on the finished workpiece 2, in particular fixed and stationary. In this case, for example, the means for supporting the tilt sensor 39 on the surface portion of the leg 35,36 from the group of magnetic holder, detachable KJebe connection, ünterdruckhaiterung, spring clamp, mechanical clamping, spring-assisted holder, manual mounting, adhesion be selected. This ensures a secure, fitting arrangement and mounting of the inclination sensor 39 on the respective surface portion of the surface of the leg or legs 35, 36.
    If, for example, the machine plane or working plane 33 is not aligned parallel and / or at right angles to one of the previously described reference planes 41, 42, it is necessary to carry out a referencing operation of the inclination sensor 39 or the angle detection device formed therefrom prior to the execution of the bending process , This makes it possible to achieve this N2011 / 37300 1o / nc / ολιo 1 λ · λο DOA λ o noi / ftö7 25 14:41:30 18-06-2012 22/37
    18
    Determine deviation from the ideal days and so to be able to perform a corresponding correction calculation of the determined inclination angle 43 and subsequently the bending angle 37. In the course of the calibration process, for example, an inclined position of the sheet or a limb 35, 36 with respect to one of the reference planes 41 and / or 42 can be determined and compensated in the course of the calibration process. Thus, the respective measuring direction or the orientation of the angular position of the reference surface 40 of the inclination sensor 39 with respect to the reference plane 41 and / or 42 is increased and thus the deviation from the theoretical zero position can be determined. This correction value is then to be taken into account in the further Winkeiermittlung with.
    As a result of the preferably mostly continuous arrangement and mounting of the inclination sensor 39, already proceeding before the bending process is carried out, the bending angle 37 can be measured both during and after completion of the bending operation and possible springback of the legs. Due to the measured inclination of the reference surface 40 of the inclination sensor 39 relative to the solder, the bending angle 37 can subsequently be deduced. If a previously described biaxial inclination sensor 39 is used, corresponding sensor values are determined as a measure of the inclination in the two measurement directions. By way of example, the conversion of the voltage values of the inclination sensors 39 by means of vector geometry can be used to deduce the respective inclination angle 43 and, subsequently, the bending angle 37.
    The angle measurement with the tilt sensor 39 could also be done only by mere pressing by an operator, which can be dispensed with additional holding devices.
    In FIG. 4, the workpiece 2 with its two legs 35, 36 is still shown in a diagrammatically simplified manner, the inclination sensor 39 being arranged here only on one of the legs - namely the leg 35. This inclination sensor 39 shown here is a two-axis inclination sensor in which the two measuring directions or measuring axes are right-angle 18/06/2012 14:44
    No .: R344 P.022 / 037 2S 14:42:13 18-06-2012 23/37 ♦ · · · * ♦ · «« ♦ · · ♦
    19 aligned with each other aligned and simplified. In addition, it is shown that a slightly rotated arrangement of the tilt sensor 39 with its two registered by arrows measuring directions in a plane formed by the leg 35 with respect to the axis by the name "z". entered direction is done. This does not play such a big role with a biaxial sensor. In a still undeformed, flat starting position of the sheet or leg 35,36 is the orientation of the tilt sensor 39 with its measuring directions on the with the letter "y". referenced axis referred. In this case, this axis represents a vertical axis about which the tilt sensor 39 can be rotated.
    The tilt sensor 39 is in turn arranged with its reference surface 40 on a surface portion of at least one of the legs 35,36. In order to be able to determine the bending angle 37 enclosed by the legs 35, 36, a further inclination sensor 39, not illustrated here in detail, is to be arranged on the further leg 36 of the workpiece 2 to be produced. The measurement takes place analogously, as has already been described in detail in FIG. 3 in detail.
    FIGS. 5 and 6 show a further embodiment of the measuring arrangement of inclination sensors 39, which is possibly independent of itself, wherein the same reference numerals or component designations as in the preceding FIGS. 1 to 4 are again used for the same table. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 4 or reference. It should be noted that here on both sides of the working plane 33 each have a tilt sensor 39 is shown, it being possible to provide an inclination sensor 33 only on one side of the working plane 33. In order to increase the measuring accuracy with a greater longitudinal extent of the workpiece 2 to be produced in the direction of the bending tool 4, however, a plurality of inclination sensors 39 could also be provided on the same side of the working plane 33. The tilt sensor 39 and the tilt sensors 39 are in this embodiment by means of an elastic support member N2011 / 37300 1 fi / flfi / Ofn Ο 1Λ AP. Mr DO / 1/1 e noo 25 14:42:56 18-06-2012 24/37 • · · · · · · · · · 4 · * · φ · · · Φ 4 · φ
    20 44, the ζ.Β, is formed by a leaf spring made of spring steel or a similar durable elastic material.
    In carrying out the bending operation, the tilt sensors 39 put on the mutually facing surfaces of the workpiece 2 with the legs 35,36 to be produced. From this point on, the previously described inclination angle 43 is determined by at least one inclination sensor 39 or by both inclination sensors 39, and subsequently the bending angle 37 enclosed by the legs 35, 36 is calculated therefrom. The tilt sensor or sensors 39 may be designed such that they already perform an absolute measurement of the tilt angle 43. In this case, it is then not absolutely necessary for the inclination sensor or sensors 39 to be arranged and held against the surface section of at least one leg 35, 36 of the workpiece 2 to be produced, starting from or before the start of the bending process.
    In order to achieve an even greater flexibility of the entire measuring arrangement with the inclination sensor 39 and the carrier element 44, it can be advantageous if the carrier element 44 is interchangeable or interchangeable with the bending tool 4, in particular the bending punch 5. This also different length trained support members 44 can be used. However, it would also be possible to form the carrier element 44 in the manner of a cranked embodiment indicated by dashed lines in FIG. 5, so as to be able to carry out a measuring operation even from the beginning of the bending process. However, this is possible only when the inclination sensor 39 abuts against the intended surface portion of the workpiece 2.
    The bending process and the associated determination of the bending angle 37 can be made such that the bending process is started and then the springback of the legs 35, 36 is made possible by relief. Subsequent to this unloading process, the measurement of the angular position of the legs 35,36 is carried out and optionally carried out a further post-bending operation to the predetermined bending angle 37 exactly on N2011 / 37300 1 ß / nR / 9/11 O 1 Λ 4K Mp ΌΠΛΑ ο πολ / no7 25 14:43:39 18-06-2012 25/37 • · • ♦ 9 · 21
    To be able to train workpiece 2. After the relief of the workpiece 2 and the removal of the same from the bending tool 4, the tilt sensor or sensors 39 after the deformation of the carrier element 44 are returned to the initial position by the latter. Subsequently, the next sheet to be deformed can be spent in the bending tool 4 and a new bending operation can be performed.
    For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the production facility 1, in particular its angle detection device 46 formed by the tilt sensor or sensors 39, these or their components have been shown partially unevenly and / or enlarged and / or reduced in size.
    The task underlying the independent inventive solutions can be taken from the description.
    The exemplary embodiments show possible embodiments of the manufacturing plant 1, in particular the Winkelerfassungsvonichtung 46 formed by the or the inclination sensors 39, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather also various combinations of the individual embodiments with each other are possible and this possibility of variation due to the doctrine of technical action by objective invention in the skill of those working in this technical field is the expert. So are all conceivable Ausfährungsvarianten, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection. Furthermore, individual features or combination of mercury combinations from the illustrated and described different exemplary embodiments can also represent independent, inventive or inventive solutions.
    Above all, the individual in Figs. 1,2,3; 4; 5,6 embodiments form the subject of independent solutions according to the invention. The 18/06/2012 14:46
    No .: R344 P.025 / 037 25 14:44:21 18-06-2012 26/37
    22 relevant tasks and solutions according to the invention can be found in the detailed descriptions of these figures. N2011 / 37300
    Mr 1 q ir a / om o 1 a Λ7 DO Λ Λ n AOÖ I ΛΟΤ7 25 14:47:02 18-06-2012 »* * • · ♦ · * · Μ« • «• · · • ··· # * * • · 31/37 j 1
    Reference Designation 1 Production Plant 36 Leg 2 Workpiece 37 Bending Elbow 3 Bending Press 38 Reference Plane 4 Bending Tool 39 Inclination Sensor 5 Bending Stamp 40 Reference Surface 6 Bend Plane 41 Reference Plane 7 Machine Frame 42 Reference Plane 8 Base Plate 43 Neo-Angles 9 Sidewall 44 Carrier 10 Sidewall 45 Connecting Cable 11 Cross-Dressing 46 Angle Detecting Device 12 Fronstimal Face 47 Measuring Station 13 Press beam 14 Front surface 15 Linear guide 16 Press beam 17 End face 18 End face 19 Tool holder 20 Tool holder 21 Drive arrangement 22 Drive means 23 Power grid 24 Control device 25 Input terminal 26 Spindle drive 27 Adjustment means 28 Manipulator 29 Supply stack 30 Gripping tongs 31 Gripper fingers 32 Gripper fingers 33 Working plane 34 Bending area 35 Leg N2011 / 37300 10 / ΛΰίθηΐΟ 1 Λ, An Μ ^ ηο Λ Α n λ t firn
    权利要求:
    Claims (20)
    [1]
    25 ♦ ·· «4 • * 14:44:40 18-06-2012 27/37 • · ·« «« * * · · · · · * * ·· ···· I · 1 ), in particular for the folding of workpieces (2) to be produced from sheet metal, comprising a bending press (3), in particular a press brake, with pressing beam (13, 16), at least one bending tool (4), such as bending punch (5) and bending die ( 6), which is connected to the Pressbatken (13,16), and at least one angle detecting device (46) for determining an angular position of at least one leg formed by a bending process (35,36) of the workpiece (2) with respect to a reference plane (41,42 ), characterized in that the angle detection device (46) comprises at least one inclination sensor (39) having a reference surface (40) and the inclination sensor (39) with the reference surface (40) on a surface portion of at least one of the legs (35, 36). of the workpiece (2) can be applied by the winch-detecting device g (46) is stored.
    [2]
    2. Production plant (1) according to claim 1, characterized in that the inclination sensor (39) is designed as a uniaxial sensor
    [3]
    3. Production plant (1) according to claim 1, characterized in that the inclination sensor (39) is designed as a two-axis sensor
    [4]
    4. Production plant (1) according to one of claims 1 to 3, characterized in that the reference surface (40) are assigned a plurality of differently oriented inclination sensors (39), whereby the angle detection device (46) has a total measuring range for inclination determination and the total measuring range in several each N2011 / 37300 1 o / ncinn1o 1 λ λί Μ ι- DO ΑΛ d nm / λο7 25 • · »wmm · · · · ♦ ··« • ♦ * # is assigned to a tilt sensor (39), in particular overlapping, sub-measuring ranges «• · ♦ ♦ · ··· ♦ + ··· ♦ ···« • · · ♦ 14:45:17 18-06-2012 28/37 2
    [5]
    5. Production plant (1) according to one of the preceding claims, characterized in that the inclination sensor (39) based on the MEMS technology.
    [6]
    6. Production plant (1) according to one of vorheigehenden claims, characterized in that the angle detecting means (46) adjacent to the bending tool (4) of the bending press (3) is arranged.
    [7]
    7. Production plant (1) according to one of claims 1 to 5, characterized in that the angle detection device (46) is arranged distanced to the bending tool (4) of the bending press (3).
    [8]
    8. Production plant (1) according to one of the preceding claims, characterized in that the inclination sensor (39) with a holding means on the surface portion of the leg (35, 36) of the workpiece to be manufactured (2) is held fitting.
    [9]
    9. manufacturing plant (1) according to claim 6, characterized in that the holding means of the tilt sensor (39) is selected from the group of magnetic support, detachable adhesive bond, vacuum mount, spring clamp, mechanical clamping, spring-assisted holder, manual mounting, adhesion.
    [10]
    10. Production plant (1) according to one of claims 1 to 6, characterized in that the inclination sensor (39) is arranged on an elastically deformable carrier element (44) and connected thereto, wherein the carrier element (44) with the bending tool (4) , in particular the bending punch (5), and the inclination sensor (39) is defined by a working plane (33) defined by the pressing beam (13, 16), in particular the bending tool (4) held thereon in the vertical direction with respect to the working plane (33). is arranged distanced. N201107300 -ifi / nc / omo ι / ιο M * · 0 * 5 Λ Λ ο noo ιπί ~ 7 25 14: 45; S3 18-06-2012 * · · * φ • · · Φ a • · · Φ * * V V V 3 3 3 3 3 3 3 3 3 3 3 3 3
    [11]
    11. Production plant (1) according to any one of the preceding claims, characterized in that the angle detecting device (46) at least two each formed on a leg formed by a bending process (35,36) of the workpiece to be manufactured (2) tilt sensors (39) for determining includes the angular position.
    [12]
    12. A method for determining an angular position of at least one leg formed by a bending operation (35,36) of a workpiece (2) with respect to a reference plane (41,42) by means of an angle detection device (46), characterized in that the angle detection device (46) at least comprises an inclination sensor (39) and with its reference surface (40) arranged on a surface section of at least one of the legs (35, 36) of the workpiece (2) abutting thereon, and by the inclination sensor (39) with respect to the reference plane (41, 42) an inclination angle (43) is determined.
    [13]
    13. The method according to claim 12, characterized in that the inclination angle (43) determined by the inclination sensor (39) is determined by means of a uniaxial sensor.
    [14]
    14. The method according to claim 12, characterized in that the inclination angle (43) determined by the inclination sensor (39) is determined by means of a biaxial sensor.
    [15]
    15. The method according to any one of claims 12 to 14, characterized in that the determination of the inclination angle (43) by the inclination sensor (39) is performed based on a MEMS technology.
    [16]
    16. The method according to any one of claims 12 to 15, characterized in that the inclination sensor (39) during the bending process on the surface portion of the leg (35,36) of the workpiece (2) is held in abutment. N2011 / 37300 IQ / Λβ / om O 1 Λ AO »Ir. DO Λ Λ d non / no 25 25 14:46:31 18-06-2012 30/37 Μ · «« ♦ ♦ «♦ · · * *» »« «· I 4
    [17]
    17. The method according to any one of claims 12 to 16, characterized in that the inclination sensor (39) at the surface portion of the leg (35,36) of the workpiece (2) with a holding means is fixedly held thereto.
    [18]
    18. The method according to any one of claims 12 to 17, characterized in that prior to performing the bending operation, a referencing of the tilt sensor (39) is performed.
    [19]
    19. The method according to any one of claims 12 to 18, characterized in that after at least partially carrying out a bending operation, the bending tool (4) is opened so far that the two legs (35,36) without application of a deforming compressive force between the bending tool (4) are held and in this position, the inclination angle (43) is determined at least on one of the legs (35,36) of the workpiece to be manufactured (2).
    [20]
    20. The method according to any one of claims 12 to 19, characterized in that on both legs (35, 36) of the workpiece (2) each have a tilt sensor (39) is applied. TRUMPF Maschinen Austria GmbH & Co. KG. by Anwältemjraer & Partner Rechtsanwalt GmbH N2011 / 37300 1o / ne / ολιo 1 a λο Mr DOΛΛ n norwrio
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    EP2874764A1|2015-05-27|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA692/2012A|AT512282B1|2012-06-18|2012-06-18|Bending press with angle detection device|ATA692/2012A| AT512282B1|2012-06-18|2012-06-18|Bending press with angle detection device|
    CN201380043019.8A| CN104582867B|2012-06-18|2013-06-12|Including the bullodozer of angle detection device and for the method determining angle of bend|
    PCT/AT2013/050119| WO2013188896A1|2012-06-18|2013-06-12|Bending press having an angle-measuring device and method for determining the bending angle|
    US14/408,698| US9664493B2|2012-06-18|2013-06-12|Bending press having an angle-measuring device and method for determining the bending angle|
    EP13739928.3A| EP2874764B1|2012-06-18|2013-06-12|Bending press having an angle-measuring device and method for determining the bending angle|
    JP2015517552A| JP6272317B2|2012-06-18|2013-06-12|Bending press with angle detection device and method for determining bending angle|
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