EP2161101A2 - Dispositif de tension d'une pièce usinée pour le traitement dans une affûteuse - Google Patents

Dispositif de tension d'une pièce usinée pour le traitement dans une affûteuse Download PDF

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Publication number
EP2161101A2
EP2161101A2 EP09011372A EP09011372A EP2161101A2 EP 2161101 A2 EP2161101 A2 EP 2161101A2 EP 09011372 A EP09011372 A EP 09011372A EP 09011372 A EP09011372 A EP 09011372A EP 2161101 A2 EP2161101 A2 EP 2161101A2
Authority
EP
European Patent Office
Prior art keywords
clamping
ram
axis
counter
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09011372A
Other languages
German (de)
English (en)
Other versions
EP2161101B1 (fr
EP2161101A3 (fr
Inventor
Hans-Dieter Braun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haas Schleifmaschinen GmbH
Original Assignee
Haas Schleifmaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haas Schleifmaschinen GmbH filed Critical Haas Schleifmaschinen GmbH
Publication of EP2161101A2 publication Critical patent/EP2161101A2/fr
Publication of EP2161101A3 publication Critical patent/EP2161101A3/fr
Application granted granted Critical
Publication of EP2161101B1 publication Critical patent/EP2161101B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
    • B24B41/062—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/34—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of turning or planing tools or tool bits, e.g. gear cutters
    • B24B3/343—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of turning or planing tools or tool bits, e.g. gear cutters of throw-away cutting bits

Definitions

  • the invention relates to a device for clamping a workpiece for machining in a grinding machine according to the preamble of patent claim 1.
  • the plan sides of the cutting insert are first ground in a first step. Subsequently, the periphery is ground to give the insert its shape, and finally the contour, that is, the cutting edge profile of the inserts is ground.
  • the cutting plates are clamped between two aligned in a clamping axis ram, which are acted upon on the one hand with an axial clamping force against each other to clamp the workpiece between the plungers, and on the other hand have a controlled rotary drive to the workpiece in the circumferential direction in Reference to the grinding wheel position.
  • Such a clamping device is for example from the EP 1 579 954 A1 known.
  • This known device has a holding element, in which the one ram as counter-ram freely rotatable, but is mounted axially immovable.
  • the holding element is guided axially freely displaceable on the serving as a clamping ram second plunger.
  • the clamping ram can be used for rotary positioning be driven rotationally.
  • On the holding element engages a lever which moves the holding element on the clamping plunger to initiate the axial clamping force in the fixed to the holding element counter-plunger.
  • the holding element is C-shaped, wherein the one leg receives the counter-ram, while the other leg leads the clamping ram.
  • the alignment of the two plungers in the clamping axis is thus determined by the dimensional stability of the C-shaped support member. Deformations of the holding element, for example due to thermal influences, can thus influence the exact alignment of the plungers and thus the accuracy of the grinding process.
  • the invention has for its object to provide a clamping device for workpieces during processing in a grinding machine, which ensures high precision in the tension and alignment of the workpiece.
  • the counter-plunger which is axially immovable and supports the axial clamping force is received in a base body.
  • a guide block is guided linearly displaceable parallel to the clamping axis.
  • This guide block accommodates the clamping ram, which is freely rotatably and axially displaceably mounted in this guide block.
  • An actuating device transmits the clamping force to the clamping ram, wherein this clamping force is introduced into the clamping ram so that only one axial Force is transmitted, but not perpendicular to this axial force radial force component.
  • the clamping ram is aligned in this way with high precision axially aligned with the counter-ram.
  • the axial alignment is ensured by the linear guidance of the guide block on the base body, so that no deformations or transverse forces can occur in the clamping device, which affect this axial alignment.
  • a servo motor which causes the controlled rotary drive of the counter-ram, received in the main body of the device.
  • the clamping device may be formed as a complete unit that can be used in a conventional grinding machine otherwise.
  • the workpiece can then rotate on the one hand to the clamping axis to grind the circumference of the workpiece.
  • the clamping axis can be pivoted about the rotational axis of the grinding machine, so that the workpiece is pivoted relative to the grinding tool to grind the contour. Both grinding operations can be done in the same tension of the workpiece, which increases the precision of machining and saves time.
  • the introduction of the clamping force in the device can be carried out in an advantageous manner via an actuating rod, which is axially displaceable.
  • the actuating rod In the direction of the clamping movement, the actuating rod is preferably acted upon axially by a spring force.
  • the tension rod is moved against this spring force, for example by a pneumatic unit.
  • FIG. 1 schematically shows the basic structure of a grinding machine, which can be equipped with the inventive device for clamping a workpiece, in particular a cutting insert or indexable insert.
  • the grinding machine has a machine bed 10 with a vertical rear wall 12.
  • a table 14 is arranged, which is movable in a horizontal Y-axis perpendicular to the front operator side and the rear wall 12 controlled.
  • a cross slide is arranged, which is controlled in a direction perpendicular to the Y-axis horizontal X-axis and in a direction perpendicular to the X-axis and the Y-axis vertical Z-axis movable.
  • a grinding spindle unit 18 which is rotatably supported in the carriage 16 about a C-axis parallel to the Z-axis and rotationally driven about this C-axis.
  • a grinding spindle is horizontally mounted, which is driven by a spindle motor 20 and carries at its free end a grinding tool 22, which is in particular designed as a cup-shaped grinding wheel.
  • a workpiece spindle unit 24 is arranged, which receives a workpiece spindle 26.
  • the workpiece spindle 26 is rotatable by means of a motor 28 numerically controlled about its axis parallel to the X-axis A-axis.
  • the grinding machine corresponds to the state of the art.
  • FIG. 4 As in the Figures 2 and 3 can be seen, on the workpiece spindle 26, a clamping device mounted as in FIG. 4 is shown.
  • the tensioning device has a main body 30.
  • coupling means are mounted, with which the base body 30 can be fixedly connected to the workpiece spindle 26.
  • the coupling agent consist in the illustrated Embodiment of a shaft taper 32 which is inserted into the receiving flange of the workpiece spindle 26 and screwed thereto.
  • the main body 30 is thus controlled via the workpiece spindle 26 pivotable about the A-axis.
  • a servo motor 34 is firmly received.
  • a counter-ram 38 is mounted, which is coaxially aligned with the motor shaft of the servomotor 34.
  • the counter-ram 38 can be numerically controlled by means of the servomotor 34 about its central axis, which is referred to as the clamping axis, are rotated.
  • the servo motor 34 and the counter-ram 38 are arranged in the base body 30 so that the axis of the counter-ram 38, ie the clamping axis orthogonally intersects the central axis of the shaft cone 32 and thus the A-axis. Accordingly, the clamping axis can also be referred to as B-axis, as in FIG. 2 is indicated.
  • a guide block 40 is mounted in the base body 30 below the clamping axis and spaced therefrom.
  • the guide block 40 is guided linearly displaceable in the main body 30 in a direction parallel to the clamping axis direction.
  • the base body 30 for example, a recess in which the guide block 40 is arranged and slides on guides 42 which extend parallel to the clamping axis and are mounted in the base body 30.
  • the guides 42 are formed in the illustrated embodiment as guide rods.
  • the guide block 40 can move freely on the guides 42 with a stroke of, for example, about 10 millimeters.
  • a guide bush 44 is attached on the guide block 40.
  • the guide bush 44 is axially aligned with the central axis the counter-ram 38 aligned.
  • a clamping ram 46 is guided free of play both axially and rotationally freely movable.
  • the clamping ram 46 is preferably formed conically at its end facing the counter-ram 38 end.
  • a workpiece, in particular an indexable insert 48 can be tensioned between the counter-ram 38 and the clamping ram 46 by the indexable insert 48 is arranged centrally to the clamping axis and the clamping ram 46 is moved by force against the counter-ram 38.
  • the clamping ram 46 can penetrate into a clamping recess or clamping bore of the indexable insert 48 in order to clamp it centered on the counter-ram 38.
  • an actuating rod 50 is arranged, which leads coaxially through the shaft cone 32 and with an in FIG. 5 52 designated stroke is axially displaceable.
  • the actuating rod 50 is biased with a spring force which pushes the actuating rod 50 out of the shaft taper 32.
  • this preload is generated by a package of cup springs 54 which are supported at one end on the stem cone 32 and the other end to an outer collar of the actuating rod 50.
  • the coaxially through the shaft cone 32 in the workpiece spindle 26 leading end of the actuating rod 50 is further connected to a non-visible in the drawing pneumatic unit through which the actuating rod 50 against the spring force of the plate springs 54 can be pushed inwardly into the base body 30.
  • the inner end of the actuating rod 50 is pivotally connected via tabs 56 with an arm of a pivot lever 58 which is pivotally mounted about a pivot point 60 in the base body.
  • the pivot lever 58 has two approximately perpendicular arms, one of which is hinged to the actuating rod 50 and substantially perpendicular to this runs.
  • a ball 62 mounted, with which the pivot lever 58 rests against the end face of the clamping ram 46 facing away from the counter-ram 38.
  • the free arm of the pivot lever 58 is freely pivotable between the guide block 40 with the guide bushing 44 and a stop 64 which limits the pivotal movement of the free arm of the pivot lever 58 of the guide block 40 and the guide bushing 44 away.
  • this stop 64 is formed by the head of a screw which is screwed into the guide block 40 and whose shaft passes through a slot in the arm of the pivot lever 58.
  • the pivoting of the pivot lever 58 is thus limited to the length of the screw shank of the stop 64.
  • a locking ring 66 is still placed on the clamping ram 46 at its rear end, which protrudes from the guide bush 44 against the ball 62.
  • the clamping device works in the following way:
  • the actuating rod 50 is pressed by means of the pneumatic unit against the force of the disc springs 54 in the main body 30.
  • the actuating rod 50 thereby pivots the pivot lever 58 in the representation of FIG. 5 in the counterclockwise direction.
  • the free arm of the pivot lever 58 thereby moves on the shaft of the screw of the stop 64 until the pivot lever 58 abuts against the stop 64 of the screw head.
  • this takes over the stop 64 with the guide block 40 with.
  • the guide block 40 takes with its guide bush 44 while the clamping ram 46, since the guide bushing 44 on the locking ring 66 of the clamping ram 46th comes to the plant.
  • the clamping ram 46 is thus pulled away axially from the counter-ram 38, so that the tensioned and finished, ground indexable insert 48 is released.
  • the indexable insert 48 can be detected, for example, by a handling gripper 68, which is moved by means of the cross slide 16.
  • the handling gripper 68 places the ground indexable insert 48, for example in a cassette 70, removes the cassette 70 from an unpolished indexable insert 48 and brings it into the clamping position between the counter-ram 38 and the clamping ram 46.
  • the workpiece namely the indexable insert 48
  • the grinding wheel 22 can now be ground by means of the grinding wheel 22.
  • the cross slide 16 the grinding wheel 22 is delivered in the X-axis and the Z-axis, while a feed movement in the Y-axis via the table 14 can take place.
  • the clamping device is pivoted about the A-axis so that the clamping axis defined by the counter-ram 38 and the clamping ram 46 is horizontal, i. parallel to the Y-axis.
  • the circumference can now be ground by the counter-ram 38 is rotated by means of the servo motor 34 about the clamping axis.
  • the workpiece, the indexable insert 48 is frictionally rotated and also the clamping rod 46 rotates freely in the guide bushing 44.
  • the cutting contour of the insert 48 can be ground in the same voltage, for which purpose the clamping device is pivoted about the A-axis by means of the motor 28 , As a result, the angle of attack of the clamping axis is pivoted against the axis of the grinding wheel 22 to produce, for example, chamfers of the cutting edge, free cutting surfaces on the circumference and any troughs in the plate planes.
  • the counter-ram 38 is shaped so that its diameter decreases conically from the end flanged to the shaft flange of the servomotor 34 against the end abutting the workpiece 48.
  • the plungers 38 and 46 on both sides of the tensioned indexable insert 48 has a small diameter, so that sufficient space is available to even with a cup-shaped Grinding wheel 22 on both sides of the insert 48 to attack.
  • the finished workpiece 48 is released again by acting on the actuating rod 50 by means of the pneumatic unit, so that the cycle described can start again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP09011372A 2008-09-08 2009-09-04 Dispositif de tension d'une pièce usinée pour le traitement dans une affûteuse Active EP2161101B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008046085A DE102008046085A1 (de) 2008-09-08 2008-09-08 Vorrichtung zum Spannen eines Werkstücks für die Bearbeitung in einer Schleifmaschine

Publications (3)

Publication Number Publication Date
EP2161101A2 true EP2161101A2 (fr) 2010-03-10
EP2161101A3 EP2161101A3 (fr) 2010-12-22
EP2161101B1 EP2161101B1 (fr) 2011-08-31

Family

ID=41426248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09011372A Active EP2161101B1 (fr) 2008-09-08 2009-09-04 Dispositif de tension d'une pièce usinée pour le traitement dans une affûteuse

Country Status (4)

Country Link
EP (1) EP2161101B1 (fr)
AT (1) ATE522321T1 (fr)
DE (1) DE102008046085A1 (fr)
ES (1) ES2369395T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107234302A (zh) * 2017-07-21 2017-10-10 彭州市锐利刀具机械有限公司 一种夹紧装置及磨齿机
US20210069858A1 (en) * 2019-09-11 2021-03-11 Agathon AG, Maschinenfabrik Modular clamping device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013213176B4 (de) * 2013-07-04 2015-01-15 Haas Schleifmaschinen Gmbh Vorrichtung zum Spannen eines Werkstückes
CN112757058B (zh) * 2020-12-28 2022-01-14 广东鼎泰机器人科技有限公司 一种刀具打磨设备
CN113146469A (zh) * 2021-05-14 2021-07-23 中航动力株洲航空零部件制造有限公司 一种零部件加工用磨工夹具
CN113547346B (zh) * 2021-07-01 2022-12-09 山东元塑管业有限公司 一种高效安全型螺旋波纹管生产用全自动拉伸切割设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1579954A1 (fr) 2004-03-25 2005-09-28 WENDT GmbH Dispositif de serrage à tige-poussoir

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115956A (en) * 1977-06-28 1978-09-26 S. E. Huffman Corporation Programmably controlled machine for grinding end cutting tools and the like
FR2720021B1 (fr) * 1994-05-19 1996-08-02 Buchmann Optical Eng Machine à meuler des verres ophtalmiques comportant des moyens d'asservissement de la valeur de serrage de l'ébauche du verre à meuler.
DE10008710C2 (de) * 2000-02-24 2002-01-10 Loh Optikmaschinen Ag Vorrichtung zum zentrierenden Spannen von optischen Linsen für deren Randbearbeitung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1579954A1 (fr) 2004-03-25 2005-09-28 WENDT GmbH Dispositif de serrage à tige-poussoir

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107234302A (zh) * 2017-07-21 2017-10-10 彭州市锐利刀具机械有限公司 一种夹紧装置及磨齿机
CN107234302B (zh) * 2017-07-21 2023-11-10 彭州市锐利刀具机械有限公司 一种夹紧装置及磨齿机
US20210069858A1 (en) * 2019-09-11 2021-03-11 Agathon AG, Maschinenfabrik Modular clamping device
CN112476077A (zh) * 2019-09-11 2021-03-12 阿加森机械制造股份有限公司 模块化夹紧装置
EP3792001A1 (fr) * 2019-09-11 2021-03-17 Agathon AG, Maschinenfabrik Dispositif de serrage modulaire

Also Published As

Publication number Publication date
ES2369395T3 (es) 2011-11-30
DE102008046085A1 (de) 2010-03-11
EP2161101B1 (fr) 2011-08-31
EP2161101A3 (fr) 2010-12-22
ATE522321T1 (de) 2011-09-15

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