• 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 present invention relates to a method for gear machining a workpiece (4) with a tool arranged on a gear cutting machine, wherein coolant is applied to the tool during gear cutting by means of a coolant nozzle (50, 50 '), wherein the orientation and / or position of the coolant nozzle (50, 50 ') is adjusted depending on a pitch angle of the tool.
    公开号:CH714436A2
    申请号:CH01520/18
    申请日:2018-12-10
    公开日:2019-06-14
    发明作者:Matthias Plessing；Geiser Hansjörg；Weixler Johannes
    申请人:Liebherr Verzahntech Gmbh；
    IPC主号:
    专利说明:

    Description: The present invention relates to a method for gear machining of a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool by means of a coolant nozzle during gear machining. Furthermore, the present invention relates to a corresponding gear cutting machine.
    Gear machining requires the cooling of the tool via a coolant, which is usually applied to the tool by means of a coolant nozzle. This can be done, for example, by directing the coolant jet onto the machining gap between the tool and the workpiece by means of the coolant nozzle.
    From US 2008/076 339 A1 it is known to pivot such a coolant nozzle about an axis which is perpendicular to the axis of rotation of the tool and the workpiece by 180 °, in order to stop the dripping of the coolant nozzle remaining during a machining stop Avoid coolant on the tool. This is to avoid an imbalance in the tool caused by the droplets being drawn into the tool.
    Furthermore, it is known from the prior art to adjust the orientation and / or position of the coolant nozzle for machining the workpiece. For example, EP 1870 202 A1 provides for the coolant nozzle either to be moved linearly along an axis which runs in a plane perpendicular to the axis of rotation of the tool, or to pivot about an axis which runs parallel to the axis of rotation of the tool. In particular, the position or orientation of the coolant nozzle can be adapted to different tool diameters.
    From DE 10 2006 009 547 A1 a gear cutting machine is known in which the coolant nozzle can be moved parallel and perpendicular to the axis of rotation of the tool via two linear axes, and can be pivoted about a pivot axis which runs parallel to the axis of rotation of the tool , According to this document, the setting of the coolant nozzle made by the machine setter or operator of the machine is automatically checked in a special control cycle by measurement on the machine and the machining process is only released if the test criteria specified on the machine control system are met. This is to ensure that the coolant jet touches the tool tangentially and is thus drawn into the grinding gap between the tool and the workpiece.
    The object of the present invention is to improve a method for gear machining mentioned at the outset, or to provide an improved gear cutting machine.
    This object is solved by the independent claims of the present application. Advantageous embodiments of the present application are the subject of the dependent claims.
    In a first aspect, the present invention comprises a method for gear machining of a workpiece with a tool arranged on a gear cutting machine, wherein coolant is applied to the tool during the gear machining by means of a coolant nozzle. It is provided according to the invention that the orientation and / or position of the coolant nozzle is set as a function of a pitch angle of the tool.
    The inventors of the present invention have recognized that shading can occur due to the pitch angle of the tool, which leads to the fact that at least one of the two flanks of the tool is not optimally supplied with coolant. This can, for example, lead to grinding burn on one of the two flanks of the workpiece or to a different grinding burn distribution between the left and right workpiece flanks.
    [0010] The coolant nozzle is therefore preferably set at a defined angle relative to the pitch of the workpiece. As a result, an improved coolant supply to the two flanks can be achieved.
    The coolant nozzle is preferably set in an angular range of ± 10 ° to the slope of the workpiece.
    Depending on the application, an exact adaptation to the pitch angle of the tool or a deliberate deviation from this pitch angle can be particularly advantageous. In a possible embodiment of the present invention, the coolant nozzle can therefore be adjusted in the direction of the slope of the workpiece. Alternatively, the coolant nozzle may have a non-zero angle to the pitch of the tool.
    Furthermore, in one possible embodiment of the present invention, the alignment of the coolant nozzle can be tracked after one or more dressing processes in which the pitch angle is changed. This takes into account the fact that when dressing with a decreasing screw diameter, the pitch angle of the screw can also be changed. So far, the coolant nozzle has only been adjusted to the decreasing diameter. According to the invention, the coolant nozzle can now also track the changed pitch angle.
    In a second aspect, the present invention comprises a method for machining a workpiece with a tool arranged on a gear cutting machine, wherein coolant is applied to the tool during the gear machining by means of a coolant nozzle. According to a first variant of the second aspect, it is provided that the orientation of the coolant nozzle is changed during the machining of the workpiece.
    So far, it was only known to mount the coolant nozzle so that it is always aligned with the center of the workpiece and therefore did not have to be carried when the tool was displaced, or in the event that the coolant nozzle had its own shift axis, to carry them linearly with the tool during gear machining in the shift direction of the tool, so that it is always directed towards the gap between the tool and the workpiece. Furthermore, it was known to adapt the alignment of the coolant nozzle to the tool before starting gear machining.
    According to the first variant of the second aspect of the present invention, however, the orientation of the coolant nozzle is changed during the gear machining of the workpiece. The inventors of the present invention have recognized that an improved coolant supply can be achieved over the entire machining process.
    In particular, it can be provided to change the orientation of the coolant nozzle via one or more pivot axes during the gear machining of the workpiece.
    The orientation of the coolant nozzle is preferably changed via a pivot axis which runs in a plane which is perpendicular to the axis of rotation of the tool. The pivot axis can also run perpendicular to the axis of rotation of the workpiece.
    In a preferred embodiment of the present invention, the orientation of the coolant nozzle is set depending on a tool feed and / or the machining position of the tool relative to the workpiece. In particular, according to the invention, the orientation is changed as a function of a tool feed in the axial direction of the workpiece, i.e. the orientation of the coolant nozzle is changed along the width of the workpiece.
    Alternatively or additionally, work can be carried out with a different orientation of the coolant nozzle when cutting the workpiece and / or when the tool exits the workpiece than when machining the center of the workpiece.
    Such a modification of the orientation of the coolant nozzle over the width of the workpiece makes it possible, for example, to optimize the conditions for the coolant jet when cutting and when the tool exits the toothing, since often with helical gears due to the engagement conditions of the tool with the workpiece, An unfavorable supply of cooling lubricant to the point of intervention can occur in these areas. For this reason, the orientation of the coolant nozzle is preferably selected so that more coolant reaches the flank of the tool that is actually used for machining during the first cut or the exit.
    In a second variant of the second aspect, instead of or in addition to changing the orientation of the coolant nozzle, the relative position between the coolant nozzle and an engagement area between the tool and the workpiece can be changed during the gear machining of the workpiece.
    The engagement area means those two flanks which are gear-machined as part of the corresponding machining stroke. In gear machining according to the prior art, the coolant nozzle was always aligned with a specific point in this engagement area, in particular with the axis of rotation of the workpiece. In particular, the center of the jet generated by the coolant nozzle was centered on an area between the two tooth flanks machined during this stroke and / or on the axis of rotation of the workpiece.
    According to the invention, the coolant nozzle is now at least no longer aligned over the entire machining stroke to the same point of the engagement area and / or to the axis of rotation of the workpiece.
    In particular, the relative position and / or the distance between the coolant nozzle and a plane which is perpendicular to the axis of rotation of the tool and in which the axis of rotation of the workpiece runs can be changed during the gear machining of the workpiece.
    [0026] In particular, the change in the relative position can take place via an axis of movement of the coolant nozzle, and in particular via an axis of movement assigned only to the coolant nozzle.
    [0027] The coolant nozzle can be moved along a linear axis in order to change the relative position. In particular, the linear axis can run parallel to the axis of rotation of the tool and / or parallel to the shift axis of the tool.
    The relative position between the coolant nozzle and the engagement area is preferably set as a function of a tool feed, in particular as a function of a tool feed in the width direction of the workpiece.
    In particular, it can be provided to shift the coolant nozzle in the shift direction of the tool, depending on the machining position of the workpiece relative to the tool, relative to the workpiece, in order to achieve a better coolant supply at the tool engagement point.
    The coolant nozzle is preferably moved at least in sections at a speed which differs from the feed speed of the tool in the axial direction, that is to say the shift speed.
    Alternatively or additionally, the ratio between the shift speed of the tool and the travel speed of the coolant nozzle can be changed via the workpiece width.
    In the second variant, in particular when the tool exits the workpiece and / or when cutting the workpiece, a different relative position between the coolant nozzle and the engagement area can be used than when machining the center of the workpiece.
    Preferably, in particular when the tool exits and / or enters the toothing, a change in the relative position in the direction of the tooth flank actually machined in this area takes place. This also takes into account the fact that when cutting and when the tool exits the toothing, only one of the two tooth flanks is actually machined.
    [0034] The coolant nozzle is therefore preferably aligned in this area to the tooth flank actually machined. In the center of the workpiece, however, the coolant nozzle is preferably aligned to an area between the two flanks to be machined.
    The first and the second variant of the second aspect of the present invention are initially the subject of the present invention independently of one another. In one possible embodiment, however, the two aspects are combined.
    The first and second aspects of the present invention are initially the subject of the present invention independently of one another. However, the two aspects are particularly preferably combined. In particular, the first variant of the second aspect can be combined with the first aspect.
    In particular, a deviation between the orientation of the coolant nozzle and the pitch angle of the tool can be varied during gear machining and in particular over the workpiece width.
    Particularly preferably, when cutting the workpiece or when the tool exits the workpiece, the coolant nozzle has an orientation that deviates from the pitch angle, while in the area of the workpiece center one works with an orientation that is closer to the pitch angle of the tool and preferably that Incline angle corresponds.
    The present invention further comprises a method for gear machining of a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool during the gear machining by means of a coolant nozzle. According to the third aspect, it is provided that the angle which the coolant nozzle has relative to a plane running perpendicular to the axis of rotation of the tool is set for gear machining.
    According to the prior art, the coolant nozzle was at most pivotable in a plane running perpendicular to the axis of rotation of the tool. However, the inventors of the present invention have recognized that by adjusting the angle which the coolant nozzle has relative to this plane, an improved supply of coolant is achieved.
    [0041] In particular, this angle is set as a function of parameters of the tool and / or the workpiece and / or the gear machining.
    The third aspect of the present invention is initially independent of the first and second aspects of the present invention. However, the alignment of the coolant nozzle according to the first and second aspects is particularly preferably adjusted at least also by adjusting the angle which the coolant nozzle has relative to the plane running perpendicular to the axis of rotation of the tool.
    [0043] In the following, preferred configurations of the inventive method described above will now be described. Unless otherwise stated, these are configurations which can be used in any of the aspects described above.
    In a preferred embodiment of the present invention, the coolant nozzle is pivoted about a pivot axis, the direction of which has an angle not equal to zero to the direction of the axis of rotation of the tool. This results in further setting options which were not available in the prior art. In particular, this pivot axis is used to adjust or change the orientation of the coolant nozzle or the angle of the coolant nozzle described above.
    Preferably, the pivot axis of the coolant nozzle extends in a plane running perpendicular to the axis of rotation of the tool. In one possible embodiment, the direction of the pivot axis can be perpendicular to the direction of the axis of rotation of the tool and / or perpendicular to the direction of the axis of rotation of the workpiece.
    According to a further preferred aspect of the present invention, the setting and / or change is carried out according to the method described above on the basis of at least one or preferably several of the following parameters: pitch angle of the tool, pitch direction of the tool, tool diameter and / or number of gears of the tool , The direction of the slope defines whether the slope is oriented to the left or to the right. It is therefore a very simple, rough statement of the pitch angle.
    In a preferred embodiment of the present invention, the setting or change is carried out according to the method described above via at least one machine axis of the gear cutting machine. In particular, it is an NC axis.
    [0048] In addition to the settings or changes described above, a position of the coolant nozzle in the tool width direction can be set or changed according to the invention. Alternatively or additionally, a position and / or swivel position of the coolant nozzle can be set or changed in a plane perpendicular to the axis of rotation of the tool.
    In particular, according to the invention, a plurality of movement axes can be controlled in order to set or change the position and / or orientation of the coolant nozzle.
    In a possible embodiment of the present invention, the coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed from above into the engagement area of the tool and the workpiece, in particular obliquely from above. In particular, the coolant nozzle can be arranged on a slide which can be moved on a guide, the guide being arranged above the tool holder on a machining head of the gear cutting machine.
    In a possible embodiment of the present invention, the coolant nozzle or a second coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed from below into the engagement area of the tool and the workpiece, in particular obliquely from below. In particular, this coolant nozzle can be arranged on a slide which can be moved on a guide, the guide being arranged below the tool holder on a machining head of the gear cutting machine.
    In a possible embodiment of the present invention, this coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed in obliquely from below at an angle which depends on the helix angle of the toothing and / or the pitch angle of the tool.
    In a possible embodiment of the present invention, this coolant nozzle is set so that it is aligned in an angular range of ± 10 ° to the helix angle of the toothing and / or to the pitch of the tool.
    In a possible embodiment of the present invention, two coolant nozzles are provided, which are arranged on the gear cutting machine in such a way that one coolant nozzle sprays the coolant from above into the engagement area of the tool and the workpiece and the other coolant nozzle from below into the engagement area sprayed from tool and workpiece, especially diagonally from above and diagonally from below.
    Both coolant nozzles are preferably each arranged on a slide which can be moved on a guide, the guides being arranged above and below the tool holder on a machining head of the gear cutting machine.
    In a first variant, both coolant nozzles are set and / or moved according to the invention. In a second variant, only one of the two coolant nozzles is set and / or moved according to the invention.
    In a fourth, independent aspect, the present invention comprises a method for machining a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool during the gear machining by means of at least one coolant nozzle. According to the fourth aspect, it is provided that the at least one coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed laterally into the engagement area of the tool and the workpiece.
    In particular for workpieces with a small diameter and / or short axial length, in which it is difficult in the conventional injection direction to get sufficient cooling liquid to the engagement area, the lateral spraying can be advantageous.
    The coolant nozzle according to the fourth aspect is preferably used in addition to a further coolant nozzle, which sprays coolant from above and / or from below into the engagement area.
    This additional coolant nozzle can be operated as described above in accordance with one of the other aspects of the present invention. However, the further coolant nozzle can also be operated according to any method according to the prior art.
    In a possible embodiment of the present invention, the at least one coolant nozzle is aligned in the circumferential direction of the workpiece.
    In a possible embodiment of the present invention, a main spray direction of the coolant nozzle has an angle of less than 60 °, more preferably less than 45 °, more preferably less than 35 ° to the axis of rotation of the tool holder.
    In a possible embodiment of the present invention, a main spray direction of the coolant nozzle has an angle of more than 5 °, more preferably of more than 10 °, to the axis of rotation of the tool holder.
    In a possible embodiment of the present invention, the coolant is sprayed into the engagement area only on one side. In this case, the coolant is advantageously sprayed into the engagement area only on the incoming side of the workpiece.
    In a preferred embodiment of the present invention, however, a coolant nozzle is provided on both sides of the engagement area, so that the coolant is sprayed into the engagement area of the tool and the workpiece on both sides.
    In a possible embodiment of the present invention, the workpiece is arranged on the workpiece holder via gripping elements, the gripping elements being chamfered on their side facing the tool toward the engagement area, so that the coolant sprayed by the at least one coolant nozzle over a slope of the Gripping elements is guided to the engagement area.
    The gripping elements are preferably part of an automation system which transports workpieces to be machined to the workpiece holder and transports machined workpieces. In particular, the gripping elements are arranged on a ring automation.
    To process the workpiece, the gripping elements are preferably moved a predetermined distance away from the workpiece, but still surround the workpiece at least partially.
    For machining the workpiece, the gripping elements preferably remain at an unchanged distance from the tool next to the workpiece and / or are only moved away from the workpiece in a plane which runs parallel to the axis of rotation of the workpiece holder and to the axis of rotation of the tool holder.
    In one possible embodiment of the present invention, the at least one coolant nozzle runs in a wedge shape between the tool and a gripping element for gripping the workpiece.
    Preferably, two gripping elements are provided which grip the workpiece from opposite sides.
    In a possible embodiment of the present invention, the at least one coolant nozzle is arranged on the machine table, on the counter-holder arm and / or on the counter-holder stand of the workpiece holder. In such an embodiment, the coolant nozzle is not arranged on the machining head together with the tool holder, but at another location on the gear cutting machine. This ensures that the tool holder is accessible.
    In one possible embodiment of the present invention, the at least one coolant nozzle is arranged on a linear axis which runs parallel to the direction of the axis of rotation of the workpiece holder.
    The at least one coolant nozzle is preferably moved parallel to a machining head of the gear cutting machine during a machining stroke in order to follow the engagement region.
    The fourth aspect can also be implemented in combination with one of the other aspects described above. Either the side coolant nozzle according to the fourth aspect will be operated as described above in accordance with one of the previous aspects, or it will be provided in addition to a further coolant nozzle which is operated according to one of the preceding aspects.
    In the following, further preferred refinements of the method according to the invention described above will now be described. Unless otherwise stated, these are configurations which can be used in any of the aspects described above.
    The method according to the invention is particularly preferably used in gear grinding. In particular, the method according to the invention can be used for generating grinding. The tool is preferably a grinding tool, in particular a grinding worm.
    [0077] The method according to the invention is used in particular for machining toothed workpieces. As an alternative or in addition, gears can be machined according to the invention.
    The methods according to the invention are particularly preferably used in double-flank gear machining.
    In particular, the present invention can be used for the machining of helically toothed workpieces.
    [0080] If an orientation of the coolant nozzle is used in the context of the present invention, this is preferably understood to mean the orientation of a central axis of the coolant jet generated by the coolant nozzle. The central axis of the coolant jet is preferably that axis which defines the center of gravity of the coolant jet with regard to the amount of coolant expelled by the coolant nozzle.
    The present invention further comprises a gear cutting machine with a tool holder for holding a tool and a workpiece holder for holding a workpiece, each of which can be driven about an axis of rotation. Furthermore, the workpiece holder and tool holder can preferably be moved relative to one another via one or more axes of movement of the gear cutting machine, in order to be able to machine a workpiece held in the workpiece holder by a tool received in the tool holder. The gear cutting machine according to the invention furthermore has a coolant nozzle for applying coolant to the tool, and at least one movement axis for setting an orientation and / or position of the coolant nozzle, and also with a controller for controlling the movement axis. According to the invention, the gear cutting machine is characterized in that the control has a function for performing at least one of the methods as described above.
    According to the first aspect of the present invention, the control has a function for setting the orientation and / or position of the coolant nozzle as a function of a pitch angle of the tool.
    In particular, the pitch angle can be entered into the control, the function for setting the orientation and / or position accessing the pitch angle entered into the control. The pitch angle can be entered, for example, via an input mask and / or by loading gear data into the gear cutting machine.
    [0084] The function preferably has an input option for the alignment of the coolant nozzle relative to a pitch angle of the tool. In particular, it can be an input mask.
    Alternatively or additionally, the function can enable the setting of the coolant nozzle in a defined angular range relative to the increase in the tool, in particular in an angular range of at least ± 50 to increase the tool.
    Furthermore, alternatively or additionally, the function can provide one or more options for setting the coolant nozzle in the direction of increasing the tool or with a defined angle for increasing the tool. For example, a first option can provide an orientation of the coolant nozzle in the direction of the helix angle of the tool, at least one further option can provide an orientation with a defined angle other than zero to increase the tool.
    Furthermore, alternatively or additionally, the function can track the alignment and / or the position of the coolant nozzle after one or more dressing processes.
    [0088] According to the second aspect of the present invention, the control may include a function for changing the orientation of the coolant nozzle and / or the relative position between the coolant nozzle and the engagement area during the gear machining of the workpiece.
    The function preferably changes the orientation of the coolant nozzle and / or the relative position between the coolant nozzle and the engagement area as a function of a tool feed, in particular as a function of a tool feed in the axial direction of the workpiece and / or the tool.
    As an alternative or in addition, the function can set a changed orientation and / or relative position between the coolant nozzle and the engagement area when the workpiece is cut and / or when the tool exits the workpiece compared to the machining of the workpiece center.
    The control of the alignment and / or relative position during gear machining is preferably carried out automatically by the control.
    According to the third aspect of the present invention, the control comprises a function for setting an angle which the coolant nozzle has during the gear machining relative to a plane running perpendicular to the axis of rotation of the tool.
    At least one parameter of the tool and / or of the workpiece and / or of the gear machining can preferably be entered into the control, the function for setting the angle accessing the parameter entered into the control. The entry can be made, for example, via a user interface and / or by uploading gear data to the gear cutting machine.
    The gear cutting machine and / or the functions are preferably designed in such a way as has already been described in more detail above with regard to the method according to the invention.
    The functions according to the invention preferably each have input masks and / or control functions which are specifically adapted for carrying out the methods according to the invention.
    According to a fourth aspect, the present invention comprises a gear cutting machine with a tool holder for holding a tool and a workpiece holder for holding a workpiece, each of which can be driven about an axis of rotation, with at least one coolant nozzle for applying coolant to the tool. According to the fourth aspect, the at least one coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed laterally into the engagement area of the tool and the workpiece.
    In a possible embodiment of the present invention, the coolant nozzle is arranged such that its main spray direction has an angle of less than 60 °, more preferably less than 45 °, more preferably less than 35 ° to the axis of rotation of the tool holder.
    In one possible embodiment of the present invention, the coolant nozzle is arranged such that its main spray direction has an angle of more than 5 °, more preferably more than 10 °, to the axis of rotation of the tool holder.
    In one possible embodiment of the present invention, a coolant nozzle is provided on both sides of the engagement area, so that the coolant is sprayed into the engagement area of the tool and the workpiece on both sides.
    In a possible embodiment of the present invention, the gear cutting machine has gripping elements for arranging a workpiece on the workpiece holder, the gripping elements being chamfered on their side facing the tool towards the engagement area, so that the coolant sprayed by the at least one coolant nozzle is provided via a Incline of the gripping elements is guided to the engagement area.
    In one possible embodiment of the present invention, the at least one coolant nozzle runs in a wedge shape between the tool and a gripping element for gripping the workpiece.
    In a possible embodiment of the present invention, the gear cutting machine comprises a machine table and / or a counter holder arm and / or counter holder stand, the at least one coolant nozzle being arranged on the machine table, on the counter holder arm and / or on the counter holder stand of the workpiece holder.
    [0103] In a possible embodiment of the present invention, the at least one coolant nozzle is arranged on a linear axis which runs parallel to the direction of the axis of rotation of the workpiece holder.
    A control of the gear cutting machine is preferably provided, which moves the at least one coolant nozzle parallel to a processing head of the gear cutting machine during a machining stroke in order to follow the engagement area.
    The gear cutting machine is preferably designed and / or is preferably controlled in the manner described above with regard to the method according to the invention in accordance with the fourth aspect.
    According to a fifth aspect, the present invention comprises a gear cutting machine with a tool holder for holding a tool and a workpiece holder for holding a workpiece, each of which can be driven about an axis of rotation. Furthermore, the workpiece holder and tool holder can preferably be moved relative to one another via one or more axes of movement of the gear cutting machine, in order to be able to machine a workpiece held in the workpiece holder by a tool received in the tool holder. The gear cutting machine according to the invention furthermore has a coolant nozzle for applying coolant to the tool, and at least one movement axis for setting an orientation and / or position of the coolant nozzle, and with a controller for controlling the movement axis. According to a first independent aspect, the movement axis is a swivel axis which runs in a plane which is perpendicular to the axis of rotation of the tool holder. According to a second independent aspect, the movement axis is a linear axis which runs parallel to the axis of rotation of the tool holder and is preferably arranged on the fixed slide of the shift axis of the tool holder.
    The gear cutting machines according to the five aspects described above are initially protected independently of one another by the present invention. However, at least two of the aspects are particularly preferably implemented in combination, particularly preferably three among more preferably four or five aspects.
    In particular, the fifth aspect is preferably implemented in combination with one of the preceding aspects.
    Preferred configurations of the gear cutting machines according to the invention, which relate to the gear cutting machines in accordance with all aspects, are described in more detail below: The axis of movement of the coolant nozzle is preferably a machine axis of the gear cutting machine, in particular an NC axis.
    In addition to the axis of movement, the gear cutting machine preferably has at least one further axis of movement for setting the orientation and / or position of the coolant nozzle. In particular, it can be a movement axis for setting a position of the coolant nozzle in the tool width direction and / or for setting a position and / or swivel position in a plane perpendicular to the axis of rotation of the tool. These axes of movement are also preferably NC axes.
    [0112] The gear cutting machine according to the invention is particularly preferably a gear grinding machine. In particular, it can be a generating grinding machine.
    [0113] A grinding worm is preferably used as a tool in the gear cutting machine according to the invention.
    [0114] A face-cut workpiece and / or a gearwheel can preferably be machined by the gear cutting machine.
    [0115] The gear cutting machine preferably has a function for double-flank gear cutting machining of a workpiece. As an alternative or in addition, the gear cutting machine can have a function for processing helically geared workpieces.
    Further parameters of the tool, the workpiece and / or the machining process can furthermore preferably be entered into the gear cutting machine, the functions according to the invention accessing the parameters and making the setting and / or changing as a function of these parameters. In particular, these parameters are the direction of the pitch, the screw diameter and / or the number of tool passes.
    [0117] The coolant nozzle is preferably arranged on a machining head of the gear cutting machine via the axis of movement.
    In one possible embodiment of the present invention, the coolant nozzle is moved together with the tool holder over all axes of movement of the machining head, via which the tool holder can be moved. The movement axis or movement axes of the coolant nozzle are therefore preferably used to generate a relative movement between the coolant nozzle and the tool holder.
    Alternatively, however, the coolant nozzle can also be arranged on the machining head in such a way that at least one movement axis for moving the tool holder has no influence on the absolute position of the coolant nozzle. In this case, the relative position between the tool and the coolant nozzle can also be set via this movement axis.
    Particularly preferably, the movement axis according to the invention is provided exclusively for generating a relative movement between the coolant nozzle and the tool holder and / or workpiece holder or for adjusting the orientation and / or relative position of the coolant nozzle relative to the tool holder and / or workpiece holder.
    The control of the gear cutting machine according to the invention preferably comprises a microprocessor and a memory in which a computer program is stored with commands which are processed by the microprocessor. The computer program preferably implements the functions of the gear cutting machine according to the invention described in more detail above and / or carries out a method according to the invention.
    In addition to the gear cutting machine, the present invention also includes a computer program which can be loaded onto a gear cutting machine in order to implement one or more connection-related functions described in more detail above.
    The present invention will now be described in more detail with reference to exemplary embodiments and drawings.
    It shows: [0124]
    1 shows the basic structure of a gear cutting machine according to the invention with the axes of the machining head,
    2 shows the orientation and position of a coolant nozzle according to the invention relative to the left and right flanks of a tool, and
    3 shows a first exemplary embodiment of the movement axes for adjusting the alignment and / or position of the coolant nozzle,
    4 shows a second exemplary embodiment of the movement axes for adjusting the alignment and / or position of the coolant nozzle,
    5 shows a further embodiment of a gear cutting machine according to the invention in a first perspective view,
    6 shows the exemplary embodiment of a gear cutting machine according to the invention shown in FIG. 5 in a sectional view along a plane which is perpendicular to the axis of rotation of the workpiece holder,
    7 shows the exemplary embodiment of a gear cutting machine according to the invention shown in FIG. 5 in a second perspective view and
    8 shows the exemplary embodiment of a gear cutting machine according to the invention shown in FIG. 5 in the first perspective view, the gripping elements not being shown.
    1 shows the basic structure of a gear cutting machine, as can be used by way of example to implement the present invention.
    [0126] The gear cutting machine has a tool holder 41 which can be driven about the axis of rotation B1. Furthermore, the gear cutting machine has a workpiece holder 21 which can be driven about the axis of rotation C2. The control of the gear cutting machine is preferably designed so that the rotational movement of the tool holder can be coupled with the rotational movement of the workpiece holder.
    The tool holder 41 is arranged on a machining head 40, which axes of movement of the gear cutting machine can be moved relative to the workpiece holder 21.
    In the exemplary embodiment, the movement axes are a linear axis X1, through which the machining head 40 can be moved in a direction perpendicular to the axis of rotation C2 of the workpiece holder 21 and perpendicular to the direction of the axis of rotation B1 of the tool holder 41. The depth of engagement can be changed via this axis.
    Furthermore, a linear axis Z1 is provided, via which the machining head 40 can be moved parallel to the axis of rotation C2 of the workpiece holder 21. As a result, the tool can be moved along the tooth width of the workpiece.
    Furthermore, a pivot axis A1 is provided, which is preferably perpendicular to the axis of rotation B1 of the tool holder 41 and the axis of rotation C2 of the workpiece holder 21. The axis cross angle between workpiece and tool can be set via this swivel axis.
    Furthermore, a linear axis V1 is provided, via which the tool holder 41 can be shifted along its axis of rotation B1. As a result, the area of the tool 2 which is to come into engagement with the workpiece can be selected.
    [0132] In accordance with some aspects of the present invention, a coolant nozzle 50 is provided on the machining head 40, via which coolant is applied to the tool. This takes place in particular in that the coolant jet generated by the coolant nozzle is blasted into the gap between the workpiece and the tool during gear machining.
    [0133] The gear cutting machine according to the invention is in particular a gear grinding machine. A grinding worm is preferably used as the tool 2, which is accommodated in the tool holder 41.
    In the exemplary embodiment shown in FIG. 1, the machining head 40 is arranged on one or more slides on a tool stand 30, which in turn can be moved over a slide relative to a machine bed 20 on which the workpiece holder 21 is arranged.
    1 only shows an exemplary embodiment of the gear cutting machine according to the invention. The present invention can also be used in another mechanical and / or kinematic configuration of the gear cutting machine.
    For a more detailed explanation of the present invention and the problem on which it is based, the coolant jet provided by a coolant nozzle 50 during gear machining with the two coolant jet subareas 51 and 52 relative to the flanks LF and RF of the tool 2 used for gear machining is shown schematically in FIG. 2 ,
    The coolant nozzle 50 is set according to the prior art so that the central axis 53 of the coolant jet is aligned with the tooth base between the two tooth flanks LF and RF, which are used for gear machining. As a result, one half 51 of the coolant jet should reach the left flank LF, the second half 52 of the coolant jet should reach the right flank RF.
    If, however, a tool with an angle of increase a not equal to zero is used, as is always the case when using a grinding worm, the central axis 53 of the coolant jet can be aligned in a plane perpendicular to the axis of rotation B1 of the tool to cause shading on one of the two flanks come because the coolant jet 52 strikes this flank at an acute angle for this flank.
    According to a first aspect of the present invention, this problem is taken into account by adjusting the position and / or orientation of the coolant nozzle 50 as a function of the angle of increase α of the tool. In one possible embodiment, shadowing in the coolant jet, which is caused by large differences in the directions of the pitch angle and coolant jet, can be prevented in this way. This ensures that both sides of the grinding worm are optimally supplied with coolant.
    According to the third aspect of the present invention, the coolant nozzle can be pivoted through a certain angle with respect to a plane perpendicular to the axis of rotation B1 of the tool. The pivoting is preferably carried out in the direction of the slope or at a defined angle to the direction of the slope.
    [0141] In particular, the alignment of the coolant nozzle does not necessarily have to be exactly adapted to the pitch angle of the screw. This is just one possible option. Alternatively or additionally, a deliberate deviation from the exact pitch angle can also be used, in particular in order to counteract certain conditions at the coolant inlet and outlet into the tooth gap.
    A swivel axis P5 of the gear cutting machine is preferably used to adjust the orientation of the coolant nozzle 50. This is preferably an NC axis which is controlled by the control of the gear cutting machine. The pivot axis P5 is preferably in a plane which is perpendicular to the axis of rotation B1 of the tool holder 41.
    Alternatively or additionally, the angle between the center axis 53 of the coolant nozzle 50 and the axis of rotation B1 of the tool holder or a plane perpendicular thereto can be set by pivoting about the pivot axis P5.
    The orientation of the coolant nozzle can in particular be set as a function of one or more of the following parameters: pitch angle of the tool, pitch direction (left / right), screw diameter and / or number of tool passes.
    [0145] According to the present invention, the alignment of the coolant nozzle can be adjusted after one or more dressing processes. It is taken into account that as the screw diameter decreases during dressing, the helix lead angle is also changed. So far, it was only known to adjust the coolant nozzle to the diameter. According to the invention, however, the alignment is now also adjusted to the changing pitch angle.
    According to a second aspect of the present invention, which can be combined with the first aspect, the orientation of the coolant nozzle is changed during the machining process and in particular via a machining stroke. Alternatively or additionally, the relative position between the coolant nozzle 50 and the two flanks LF and RF of the tool used for the machining can take place during the machining and in particular via the machining stroke.
    According to the prior art, it was known to move the coolant nozzle when shifting the tool with the tool or to align the coolant nozzle firmly with the center of the workpiece and to shift the tool separately. This was to ensure that the relative position between the coolant nozzle and the two flanks used to machine the tool remains identical over the entire machining stroke.
    In contrast, according to the invention, the orientation and / or relative position is now changed during the machining and in particular via the machining stroke. The orientation and / or the relative position is preferably changed when the tool is gated and / or when the tool exits the toothing. In this way, the fact can be taken into account that only one of the two flanks is actually in engagement with the workpiece when grinding or exiting. In this area, the coolant nozzle can therefore be directed more towards the edge actually used for machining.
    This is preferably also done by pivoting the pivot axis P5. Alternatively or additionally, however, the relative position between the coolant nozzle and the tool can also be changed via a linear axis P1, which enables the coolant nozzle to be moved parallel to the axis of rotation B1 of the tool.
    For example, when machining a central part of the workpiece, the central axis 53 of the coolant jet can be aligned with the bottom of the tooth gap between the two flanks of the tool used for gear machining and / or the central axis 53 can be parallel to the pitch of the tool or with a first angle between the Center axis 53 and the slope are used, in particular an angle through which the two flanks of the tool are evenly supplied with coolant. In particular, the middle part of the workpiece can be an area in which the gear machining actually takes place on two flanks.
    Furthermore, when entering and / or exiting the toothing, the central axis can be aligned more with the flank actually used for machining and / or with an angle between the central axis 53 of the coolant nozzle 50 and the axis of rotation B1 of the tool, through which the coolant jet hits the flank less at an angle, which is actually used for machining. In this area, preferably only one flank of the tool engages with the workpiece.
    [0152] A change in the orientation and / or relative position in a first direction preferably occurs during the first cut and in a second, opposite direction when the tool exits the toothing. In the middle area of the toothing of the workpiece, however, it is possible to work with a constant alignment and / or relative position.
    A possible constructive design of the additional axes of movement of the coolant nozzle according to the invention, which can be used to implement each of the above-described procedures, will now be described in more detail with reference to FIG. 3.
    3 shows the tool 2, which is accommodated in a tool holder 41, not shown, rotatably about the axis of rotation B1, and the workpiece 4, which is accommodated in the workpiece holder 21, rotatably about the axis of rotation C2.
    According to the third aspect of the present invention, the coolant nozzle 50 now has a pivot axis P5, via which the angle between the central axis 53 of the coolant jet emitted by the coolant nozzle 50 and a plane which is perpendicular to the axis of rotation B1 of the tool changes can be.
    In the exemplary embodiment, the pivot axis P5 runs in a plane which is perpendicular to the axis of rotation B1 of the tool holder. In the exemplary embodiment, the pivot axis P5 is still perpendicular to the axis of rotation C2 of the workpiece holder or extends in a plane which is perpendicular to the workpiece holder C2.
    The coolant nozzle 50 is preferably arranged on the tool head of the gear cutting machine via the pivot axis P5. In particular, the pivot axis P5 therefore allows a relative movement between the tool holder 41 arranged on the machining head and the coolant nozzle 50.
    In particular, the coolant nozzle 50 can be arranged on the machining head 40 of a gear cutting machine via the pivot axis P5, as is shown in FIG. 1. The coolant nozzle 50 is preferably arranged on the machining head 40 such that it can be moved together with the tool holder 41 via the X1 axis, the Z1 axis and the A axis with the tool holder 41.
    In a first embodiment, the coolant nozzle can be mounted on the fixed slide of the V1 axis of the machining head 40 and is therefore not displaced via the shift axis V1 of the tool.
    In a first variant, the pivot axis P5 is rigidly arranged on the machining head 40 and intersects the axis of rotation C2 of the workpiece.
    In a second variant, the coolant nozzle is mounted on the fixed slide of the V1 axis of the machining head 40 via a linear axis P1, and can thereby be linearly displaced relative to the center of the workpiece.
    In a second embodiment, the coolant nozzle can be mounted on the movable slide of the V1 axis of the machining head 40 and is therefore also displaced via the shift axis V1. In this case, the coolant nozzle is mounted on the movable slide of the V1 axis of the machining head 40 via a linear axis P1, and can thereby be displaced linearly relative to the tool.
    According to the invention, further axes of movement can be provided for adjusting the orientation and / or position of the coolant nozzle 50 relative to the tool holder 41. In Fig. 3, three linear axes P1 to P3 and a pivot axis P4 are provided.
    The linear axis P1 allows the coolant nozzle 50 to move parallel to the axis of rotation B1 of the tool holder or parallel to the V1 shift axis.
    The linear axis P2 allows the coolant nozzle 50 to move in a direction perpendicular to the axis of rotation B1 of the tool holder and to the axis of rotation C2 of the workpiece holder. In the exemplary embodiment, the linear axis P2 runs parallel to the direction of the pivot axis P5.
    The linear axis P3 allows the coolant nozzle 50 to move parallel to its central axis 53.
    The pivot axis P4 allows the coolant nozzle to pivot about a pivot axis which runs parallel to the axis of rotation B1 of the tool holder.
    The change in the relative position between the coolant nozzle 50 and the engagement area according to the second aspect of the present invention can be carried out by one or more of the above-mentioned axes of movement of the coolant nozzle. This can be done particularly preferably by controlling the P5 axis and / or P1 axis.
    In possible exemplary embodiments of the present invention, only one, two, three or four of the movement axes P1 to P5 could also be provided.
    In a first embodiment, at least the pivot axis P5 is provided in order to change the orientation of the coolant nozzle according to the invention. The linear axis P2 is preferably also provided, more preferably the pivot axis D4. If the coolant nozzle is mounted on the fixed slide of the V1 axis of the machining head 40, the linear axis P1 is not absolutely required, but can be provided as an additional adjustment possibility of the coolant nozzle relative to the center of the workpiece. If the coolant nozzle is mounted on the movable slide of the V1 axis of the machining head 40, a linear axis P1 is required in order to shift the coolant nozzle in the opposite direction to the workpiece so that it is directed towards the engagement area, and may also be an additional adjustment option for the coolant nozzle relative to the center of the workpiece.
    [0171] In a second embodiment, at least the linear axis P1 is provided. The linear axis P2 is preferably also provided, more preferably the pivot axis D4. If the coolant nozzle is mounted on the fixed slide of the V1 axis of the machining head 40, the linear axis P1 is used to change the relative position between the coolant nozzle and the center of the workpiece. If the coolant nozzle is mounted on the movable slide of the V1 axis of the machining head 40, a linear axis P1 is required, on the one hand, in order to shift the coolant nozzle in the opposite direction to the workpiece, so that it is directed towards the engagement area, and, on the other hand, in order, according to the invention, to position the relative position between Change coolant nozzle and workpiece center.
    In both cases, the linear axis P3 is a possible option.
    In the exemplary embodiment of the present invention shown in FIGS. 1-3, the coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed from above into the engagement area between the tool and the workpiece. The coolant is therefore injected with the direction of rotation of the workpiece.
    4 shows a further exemplary embodiment of the present invention, in which a coolant nozzle 50 'is provided, which is arranged on the gear cutting machine in such a way that the coolant flow is sprayed into the engagement region from below. Spraying takes place against the direction of rotation of the tool. However, if a sufficiently large coolant flow is selected, the engagement area can still be flooded from below.
    In a first embodiment of the present invention, such a coolant nozzle 50 'can be operated in the same manner as the coolant nozzle 50 which has been described so far. In particular, the coolant nozzle 50 'can be set and / or moved via one or more of the movement axes P1' to P5 ', which are shown in FIG. 4. This can be done in the same way as already described above for the corresponding axes P1 to P5 of the coolant nozzle 50.
    In a first embodiment, the coolant nozzle 50 ′ can be provided instead of the coolant nozzle 50.
    Furthermore, in a second embodiment, both a coolant nozzle 50, which sprays coolant from above, and a coolant nozzle 50 ', which sprays coolant from below, can be provided.
    In this second embodiment, both coolant nozzles need not be designed and / or operated as described above. If one of the coolant nozzles 50 and / or 50 'is designed according to one of the aspects of the present invention or is operated according to one aspect of the present invention, the other coolant nozzle can rather not be designed and / or operated according to the invention.
    The coolant nozzles 50 and / or 50 'are preferably each arranged on a slide 12 or 12', which can be moved along a guide parallel to the axis of rotation B1 of the tool holder. In the coolant nozzle 50, the slide is arranged above the tool holder on the machining head, in the coolant nozzle 50 'below.
    The construction and control of the coolant nozzle or the additional movement axes, as shown in the exemplary embodiment in FIG. 3, can also be carried out in one possible embodiment, as is known from the document DE 10 2006 009 547 A1.
    5-8 shows an exemplary embodiment of a gear cutting machine or a method according to the invention in accordance with the fourth aspect of the present invention. The gear cutting machine can have the general structure, which has already been described above with reference to FIG. 1. An arrangement of the coolant nozzle on the processing head, as shown in FIG. 1, is not provided in this embodiment, as will be described in more detail below, at least in the exemplary embodiment.
    In the exemplary embodiment illustrated in FIGS. 5-8, coolant nozzles 60 and 60 'are provided, which inject the coolant laterally into the engagement area. The injection is therefore not in the circumferential direction of the tool, but in the circumferential direction of the workpiece.
    The main spray direction 65 of the coolant nozzles has an angle a to the axis of rotation B1 of the tool holder 41, which is less than 60 ° and more than 5 ° in the exemplary embodiment.
    The angle which the main spray direction 65 has to the axis of rotation C2 of the workpiece holder is preferably greater than 45 °, preferably greater than 60 ° and further preferably greater than 80 °.
    In the exemplary embodiment, a coolant nozzle 60 or 60 'is arranged on both sides of the workpiece 3. In alternative configurations, however, only one of these two coolant nozzles could also be provided. In this case, the coolant nozzle that is arranged on the incoming side of the workpiece 3 would preferably be selected.
    In the exemplary embodiment, the coolant nozzles 60 and 60 ′ are provided in addition to a coolant nozzle 50, which sprays coolant into the engagement area from above and thus in the circumferential direction of the tool. In one possible embodiment of the present invention, this coolant nozzle 50 can be configured in the manner described above with regard to the other aspects of the present invention. The coolant nozzle 50 in the exemplary embodiment shown in FIGS. 5 to 8 can, however, also be designed and / or operated conventionally in accordance with the prior art. Furthermore, such a coolant nozzle may also be dispensed with.
    In the exemplary embodiment shown in FIGS. 5-8, the gear cutting machine has gripping elements 70 with which the workpieces 3 are gripped and transported to the workpiece holder 21. This is preferably part of an automation system that transports workpieces to be machined to workpiece holder 21 and transports workpieces that have already been machined. The gripping elements 70 and 70 'can, for example, be arranged on a ring automation.
    [0188] The gripping elements remain arranged next to the workpiece even during the machining of the workpiece. To place the workpiece on the workpiece holder, the gripping elements are, for example, only moved slightly away from the workpiece in the radial direction and, if necessary, lowered somewhat. The gripping elements are therefore actually disturbing for the accessibility of the workpiece.
    Therefore, the coolant nozzles 60 and 60 'in the exemplary embodiment extend between the tool and the gripping elements 70 and 70' in the direction of the workpiece 3. In particular, the coolant nozzles 60 and 60 'in the exemplary embodiment run in a wedge shape between the tool and the gripping element. The gripping elements 70 and 70 'each have bevels 71 on their side facing the tool, which are arranged closer to the workpiece than the nozzle openings of the coolant nozzles 60 and 60', so that the coolant flow is directed from the coolant nozzle by means of the bevels 71 onto the engagement area ,
    In the exemplary embodiment, the coolant nozzles 60 and 60 ′ each have an enlarged nozzle opening 61 in the central region. Furthermore, a line section 62 runs along the sides of the coolant nozzles 60 and 60 'facing the gripping elements 70 and 70', which is curved toward the gripping element in order to transport as much coolant as possible into this area.
    The coolant is conducted via supply lines 63 to the coolant nozzles 60 and 60 '.
    In the illustrated embodiment, the coolant nozzles 60 and 60 'are not arranged on the machining head, but on the counter-holder arm 23 of the counter-holder 22 of the workpiece holder 21 or on the associated counter-holder stand, not shown. This arrangement is to be preferred over an arrangement on the machining head due to the installation space.
    The nozzles 60 and 60 ′ can preferably be moved via a linear axis parallel to the axis of rotation C2 of the workpiece holder 21 in order to always keep the center point of the coolant flow aligned with the point of engagement. Therefore, if the tool travels along the workpiece in the width direction, the coolant nozzles 60 and 60 'are also moved with the tool. In the case of relatively short workpieces, such a movability can also be dispensed with if necessary.
    In the exemplary embodiment, the gear cutting machine has a counter holder 22 for the workpiece holder 21, so that the workpiece 3 can be clamped between the workpiece holder 21 and the counter holder 22. The counter holder 22 is arranged on a counter holder arm 23, which in turn is arranged on a counter holder stand.
    A counter-holder stand can also be provided without a counter-holder 22 and possibly without a counter-holder arm 23, to which the nozzles 60 and 60 'are then attached. The counter holder stand can also carry the automation on which the gripping elements 70 and 70 'are arranged.
    In the exemplary embodiment, the tool holder 41 also has a counter-holder 42, so that the tool can be clamped on two sides.
    Irrespective of the exemplary embodiment, the gear cutting machine according to the invention preferably has a control with functions which implement the methods according to the invention described above.
    The present invention permits an improved supply of the tool engagement point with coolant, especially at higher cutting speeds, in particular at cutting speeds of more than 80 m per second and preferably more than 100 m per second.
    权利要求:
    Claims (26)
    [1]
    claims
    1. A method for gear machining of a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool during the gear machining by means of a coolant nozzle, characterized in that the orientation and / or position of the coolant nozzle is set as a function of a pitch angle of the tool ,
    [2]
    2. The method according to claim 1, wherein the coolant nozzle is set at a defined angle relative to the pitch of the tool, in particular in an angular range of ± 10 ° to the pitch of the tool, the coolant nozzle preferably in the direction of the pitch of the tool or at a defined angle is set for the incline of the tool.
    [3]
    3. The method according to claim 1 or 2, wherein the alignment of the coolant nozzle after one or more dressing processes, in which the pitch angle is changed, is tracked.
    [4]
    4. The method in particular according to one of the preceding claims for gear machining of a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool during the gear machining by means of a coolant nozzle, characterized in that the alignment of the coolant nozzle and / or the relative position between the coolant nozzle and the engagement area is changed during the machining of the workpiece.
    [5]
    5. The method according to claim 3, wherein the alignment of the coolant nozzle and / or the relative position between the coolant nozzle and the engagement area is set as a function of a tool feed, in particular as a function of a tool feed in the axial direction of the workpiece and / or tool, and / or wherein during the gate of the workpiece and / or when the tool exits the workpiece with a different orientation of the coolant nozzle and / or a different relative position between the coolant nozzle and the engagement area than when machining the center of the workpiece.
    [6]
    6. The method in particular according to one of the preceding claims for gear machining of a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool during the gear machining by means of a coolant nozzle, characterized in that the angle which the coolant nozzle relative to a perpendicular to Has axis of rotation of the tool extending plane for which gear machining is set, in particular as a function of parameters of the tool and / or the workpiece and / or the gear machining.
    [7]
    7. The method according to any one of the preceding claims, wherein the coolant nozzle is wasted about a pivot axis, the direction of which has a non-zero angle to the direction of the axis of rotation of the tool and preferably extends in a plane perpendicular to the axis of rotation of the tool, the direction of the pivot axis further preferably runs perpendicular to the direction of the axis of rotation of the tool and / or perpendicular to the direction of the axis of rotation of the workpiece.
    [8]
    8. The method according to any one of the preceding claims, wherein the setting and / or change takes place on the basis of at least one and preferably several of the following parameters: pitch direction of the tool, tool diameter and / or number of gears of the tool, and / or wherein the setting and / or change via at least one NC axis of the gear cutting machine.
    [9]
    9. The method according to any one of the preceding claims, wherein additionally a position of the coolant nozzle in the tool width direction and / or a position and / or pivot position in a plane perpendicular to the axis of rotation of the tool is set and / or changed.
    [10]
    10. The method according to any one of the preceding claims, wherein the coolant nozzle is arranged on the gear cutting machine so that the coolant is sprayed from above into the engagement area of the tool and workpiece, in particular obliquely from above.
    [11]
    11. The method according to any one of the preceding claims, wherein the coolant nozzle or a second coolant nozzle is arranged on the gear cutting machine so that the coolant is sprayed from below into the engagement area of the tool and workpiece, in particular obliquely from below, in particular at an angle which from depends on the helix angle of the toothing and / or the helix angle of the tool, wherein this coolant nozzle is preferably set so that it is aligned in an angular range of ± 10 ° to the helix angle of the toothing and / or the pitch of the tool.
    [12]
    12. The method according to any one of the preceding claims, wherein two coolant nozzles are provided, which are arranged on the gear cutting machine, that the one coolant nozzle sprays the coolant from above into the engagement area of the tool and the workpiece and the other coolant nozzle from below into the engagement area sprayed from tool and workpiece, especially diagonally from above and diagonally from below.
    [13]
    13. The method in particular according to one of the preceding claims for gear machining of a workpiece with a tool arranged on a gear cutting machine, coolant being applied to the tool by means of at least one coolant nozzle during gear cutting, characterized in that the at least one coolant nozzle is arranged on the gear cutting machine that the coolant is sprayed laterally into the engagement area of the tool and workpiece.
    [14]
    14. The method of claim 13, wherein a main spray direction of the coolant nozzle has an angle of less than 60 °, more preferably less than 45 °, more preferably less than 30 ° to the axis of rotation of the tool holder and / or wherein a main spray direction of the coolant nozzle has an angle of more than 5 °, more preferably of more than 10 ° to the axis of rotation of the tool holder and / or wherein a coolant nozzle is provided on both sides of the engagement area, so that the coolant is sprayed into the engagement area of the tool and workpiece on both sides.
    [15]
    15. The method according to claim 13 or 14, wherein the workpiece is arranged on the workpiece holder via gripping elements, the gripping elements being chamfered on their side facing the tool toward the engagement area, so that the coolant sprayed from the at least one coolant nozzle via a slope of the gripping elements is directed to the engagement area, and / or wherein the at least one coolant nozzle extends in a wedge shape between the tool and a gripping element for gripping the workpiece.
    [16]
    16. The method according to any one of claims 13 to 15, wherein the at least one coolant nozzle is arranged on the machine table, on the counter holder and / or on the counter holder stand of the workpiece holder and / or wherein the at least one coolant nozzle is arranged on a linear axis which is parallel to the direction of the axis of rotation of the workpiece holder, the at least one coolant nozzle preferably being moved parallel to a machining head of the gear cutting machine during a machining stroke in order to follow the engagement region.
    [17]
    17. The method according to any one of the preceding claims, wherein the gear machining is gear grinding, in particular generating grinding, and / or wherein a grinding worm is used as a tool, and / or wherein a face-toothed workpiece and / or a gear wheel is gear-machined, and / or wherein the gear machining takes place on two flanks and / or wherein a helical gear is gear machined.
    [18]
    18. Gear cutting machine with a tool holder for holding a tool and a workpiece holder for holding a workpiece, each of which can be driven about an axis of rotation, with a coolant nozzle for applying coolant to the tool, with at least one movement axis for setting an orientation and / or position of the Coolant nozzle, and with a controller for controlling the movement axis, characterized in that the controller has a function for performing at least one method according to one of the preceding claims.
    [19]
    19. Gear cutting machine according to claim 18, wherein the control has a function for adjusting the orientation and / or position of the coolant nozzle as a function of a pitch angle of the tool, wherein the pitch angle can preferably be entered into the control and the function for adjusting the orientation and / or Position accesses the pitch angle entered in the control, and / or wherein the function preferably has an input option for the alignment of the coolant nozzle relative to a pitch angle of the tool, and / or wherein the function preferably sets the coolant nozzle relative to a defined angle allows for the incline of the tool, in particular in an angular range of + 10 ° to the incline of the tool, and / or wherein the function preferably one or more options for adjusting the coolant nozzle in the direction of the incline of the tool or with a defined angle to the incline of the tool s provides, and / or wherein the function tracks the alignment and / or position of the coolant nozzle after one or more dressing processes.
    [20]
    20. Gear cutting machine according to claim 18 or 19, wherein the control comprises a function for changing the orientation of the coolant nozzle and / or the relative position between the coolant nozzle and the engagement area during the gear machining of a workpiece, the function preferably the orientation of the coolant nozzle and / or the relative position between The coolant nozzle and the engagement area are changed as a function of a tool feed, in particular as a function of a tool feed in the axial direction of the workpiece and / or tool, and / or the function when cutting the workpiece and / or when the tool exits the workpiece compared to the machining of the workpiece Sets the workpiece center changed orientation and / or relative position between the coolant nozzle and the engagement area, wherein the control of the orientation and / or relative position during gear machining is preferably carried out automatically by the controller.
    [21]
    21. Gear cutting machine according to claim 18, 19 and / or 20, wherein the control comprises a function for setting an angle which the coolant nozzle has during the gear cutting process relative to a plane running perpendicular to the axis of rotation of the tool, preferably at least one parameter of the tool and / or the workpiece and / or the gear machining can be entered into the control, the function for setting the angle accessing the parameter entered into the control.
    [22]
    22. Gear cutting machine according to one of claims 18 to 21, wherein the movement axis of the coolant nozzle is a swivel axis, the direction of the swivel axis having a non-zero angle to the direction of the axis of rotation of the tool and preferably in a direction perpendicular to the axis of rotation of the tool Plane runs, the direction of the pivot axis preferably being perpendicular to the direction of the axis of rotation of the tool and / or perpendicular to the direction of the axis of rotation of the workpiece.
    [23]
    23. Gear cutting machine, in particular according to one of claims 18 to 22, with a tool holder for receiving a tool and a workpiece holder for receiving a workpiece, each of which can be driven about an axis of rotation, with at least one coolant nozzle for applying coolant to the tool, characterized in that that the at least one coolant nozzle is arranged on the gear cutting machine in such a way that the coolant is sprayed laterally into the engagement area of the tool and the workpiece.
    [24]
    24. Gear cutting machine according to claim 23, wherein a main spray direction of the coolant nozzle has an angle of less than 60 °, more preferably less than 45 °, more preferably less than 30 ° to the axis of rotation of the tool holder and / or wherein a main spray direction of the coolant nozzle has an angle of more than 5 °, more preferably of more than 10 ° to the axis of rotation of the tool holder and / or wherein a coolant nozzle is provided on both sides of the engagement area, so that the coolant is sprayed into the engagement area of the tool and workpiece on both sides.
    [25]
    25. Gear cutting machine according to claim 23 or 24, with gripping elements for arranging a workpiece on the workpiece holder, the gripping elements being chamfered on their side facing the tool towards the engagement area, so that the coolant sprayed from the at least one coolant nozzle via a slope of the gripping elements Engagement area is guided, and / or wherein the at least one coolant nozzle extends in a wedge shape between the tool and a gripping element for gripping the workpiece.
    [26]
    26. Gear cutting machine according to claim 23, wherein the gear cutting machine has a machine table and / or a counter holder arm and / or counter holder stand, wherein the at least one coolant nozzle is arranged on the machine table, on the counter holder and / or on the counter holder stand of the workpiece holder and / or wherein the at least one coolant nozzle is arranged on a linear axis which runs parallel to the direction of the axis of rotation of the workpiece holder, preferably a controller of the gear cutting machine is provided which moves the at least one coolant nozzle parallel to a processing head of the gear cutting machine during a machining stroke in order to reach the engagement area consequences.
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    同族专利:
    公开号 | 公开日
    DE102018131041A1|2019-06-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102006009547A1|2006-02-28|2007-08-30|Reishauer Ag|Coolant nozzle correct setting monitoring method for grinding machine, involves comparing power consumption value obtained from two measurements to asses or displace setting of coolant nozzle|
    ES2321033T3|2006-06-23|2009-06-01|The Gleason Works|MACHINE TOOL.|
    JP5023635B2|2006-09-27|2012-09-12|株式会社ジェイテクト|Coolant supply device for grinding machine|
    法律状态:
    2020-09-30| PFA| Name/firm changed|Owner name: LIEBHERR-VERZAHNTECHNIK GMBH, DE Free format text: FORMER OWNER: LIEBHERR-VERZAHNTECHNIK GMBH, DE |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017129649|2017-12-12|
    DE102018131041.2A|DE102018131041A1|2017-12-12|2018-12-05|Process for tooth processing of a workpiece and gear cutting machine|
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