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WO2008017327A1 - Machine de découpage et d'estampage - Google Patents

Machine de découpage et d'estampage Download PDF

Info

Publication number
WO2008017327A1
WO2008017327A1 PCT/EP2006/065260 EP2006065260W WO2008017327A1 WO 2008017327 A1 WO2008017327 A1 WO 2008017327A1 EP 2006065260 W EP2006065260 W EP 2006065260W WO 2008017327 A1 WO2008017327 A1 WO 2008017327A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
punch
guide means
die
guide
Prior art date
Application number
PCT/EP2006/065260
Other languages
German (de)
English (en)
Inventor
Daniel Deriaz
Original Assignee
Ernst Grob Ag
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 Ernst Grob Ag filed Critical Ernst Grob Ag
Priority to PCT/EP2006/065260 priority Critical patent/WO2008017327A1/fr
Publication of WO2008017327A1 publication Critical patent/WO2008017327A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/002—Drive of the tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B26D5/06—Means for moving the cutting member into its operative position for cutting by electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/34—Hand-held perforating or punching apparatus, e.g. awls power actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
    • B30B1/181—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means the screw being directly driven by an electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type

Definitions

  • the present invention relates to a device according to the preamble of claim 1 and a method according to the preamble of claim 11.
  • Punching and embossing machines have long been known in various designs.
  • the main tool of these machines is a punch, which is brought against the usually resting on a die or against it adjacent workpiece under high pressure in attack or for breakdown.
  • embossing is used, in the second case a punching.
  • punching the material in the form of the punch resp. the die removed from the workpiece the embossing plastic deformation of the material in the workpiece is achieved.
  • bow-like areas are to be formed from an originally closed workpiece surface. In this case, the area in question is punched out of the workpiece partly by the punch, but nevertheless remains connected to the workpiece via bridges.
  • the forces are now conventionally either mechanically via an eccentric shaft or hydraulically on the Transfer stamp.
  • the conventional mechanical machines usually have very large dimensions, since the force must be built and transferred directly to the location of the punch, and are suitable for the processing of large items.
  • the hydraulic machines since the pressure build-up is separated from the stamp, also be smaller and are also suitable for the machining of smaller parts.
  • the inventive device for punching or embossing hollow cylindrical workpieces with a punch and a die which together in an axis of action cooperating radially against the inner or outer surface of the workpiece in relation to the vertical axis of the workpiece predetermined positions are undeliverable and are each coupled to a guide means, the guide means each have a controllable drive means.
  • a guide body is formed, in which at least one guide means is slidably disposed to the axis of action, which positively with the
  • the second guide means is slidably disposed in the first guide means and the drive means of the second guide means is positively connected to the first guide means.
  • This is practically a serial connection resp. Coupling of the drive means with the guide means and thus the tools, i. Stamp and die, realized.
  • the guide means are arranged displaceably in the guide body and the drive means are positively connected to the common guide body. This is practically a parallel connection resp. Coupling of the drive means with the guide means and thus the tools, i. Stamp and die, realized.
  • the drive means are advantageously carried out electronically controllable whereby the movements for the punch and the die can be performed very precisely and thus a very accurate punching and embossing is guaranteed.
  • the coordination of the two movements of punch and die can also be done very easily via a properly set up control, i. it will be adapted to the needs, i. controlled, electronic coupling of the movement of punch and die realized.
  • purely mechanical couplings in known devices which each require an exchange of mechanical coupling elements such as control disks, so can advantageously very quickly and without intervention in the device or interruption of the operation of the device changes or conversions of the motion coupling are performed.
  • the delivery values of punch and die can be adapted and changed during operation, which is particularly advantageous when used on workpieces with different wall thicknesses in the region of the processing point.
  • the drive means comprises a torque motor whose stator is directly connected to the respective guide means and whose rotor has a thread which is threaded into one of the Guide body resp. engages the first guide means connected coupling element.
  • Such motors allow on the one hand a high-precision control, ie positioning of the engine and on the other hand allow the transmission of high torque, resulting in a large permissible
  • the threaded power transmission provides a virtually backlash-free mechanical coupling between the guide body and the tools in the machine direction, i. the punch and the die, realized, which can transmit very high forces. Since the guide body is connected directly to the machine frame, on which also the workpiece carrier is arranged, an exact positioning of the tools is realized with respect to the workpiece.
  • the coupling element is designed as a threaded spindle, which is preferably aligned parallel to the axis of action.
  • a spindle can be produced very precisely and passes the drive resp. Processing forces optimally in the guide body resp. the drive means.
  • the coupling element with the guide body resp. the first guide means so slidably connected that the coupling element parallel to the axis of action displaceable or parallel or concentric to the axis of action rotatable resp. is rotatable.
  • This shift can for example by manually operable means or be realized by separate drives.
  • the guide means are formed as at least two parallel arranged rods, preferably with a round cross section.
  • the guide means can be optimally arranged and practically free of play in the guide body and move.
  • a guide means is connected to a first tool carrier, which has recesses for the passage of the other guide means, which other guide means is connected to a second tool carrier.
  • both tool carriers in the region of the axis of action tool holder for releasably securing both punches as of matrices.
  • the device can be easily equipped with different punches and dies for different workpieces.
  • the position of the punch and die can be varied as desired, so that the device can be set up both for machining from the outside to the inside or from the inside to the outside of the workpiece. Again, the simple controllability of the movements of the guide means and thus the tools, i. of punch and die, of great advantage.
  • the first tool carrier is formed in a longitudinal section substantially L-shaped and the tool holder is formed on a protruding from the free end in the axis of action hooks.
  • This can also deep, hollow cylindrical workpieces are easily processed by the hook can be brought into the interior of the workpiece to virtually the bottom of the workpiece.
  • stamp and die are each guided with its own drive means, which is advantageously each electronically controllable, parallel to each other radially displaceable with respect to the workpiece. They are radially delivered respectively. extended, wherein at least one guide means is mounted in a guide body.
  • this guide body is in communication with a workpiece carrier of the workpiece to be processed, for example, is mounted directly on the machine frame of the device in question.
  • the guide means are mounted in a common guide body.
  • the drive means are driven in accordance with the punching or embossing to be formed on the workpiece, in each case taking into account the workpiece properties at the machining location of the workpiece.
  • the speed and movement of the drive means are controlled, for example by appropriate programming of the control software. It is thus achieved a precise geometric delivery of punch and die with respect to the workpiece necessary for achieving an exact embossing or punching, which, for example, the creation of several parallel grooves with exact, predetermined geometry even with different wall thickness, as for example in a conical Course of the wall of a hollow cylinder may occur allowed. Further, for example, the contact time of the punch and die can be set exactly.
  • the drive means are electrically operated and mechanically positively connected to a coupling element which is connected to the guide body and / or a guide means. Due to the mechanically positive connection, a high precision is achieved virtually no play and the transmission of high forces with small strokes possible, as they respectively for punching resp. Embossing processes are necessary.
  • the drive means are operated as torque motors whose rotor are each connected via a thread to the coupling element, wherein the coupling element is preferably formed as a threaded rod.
  • Such Drive means can be controlled very precisely and enable the transmission of high torques, which leads to high machining forces.
  • both tools ie both punch and die
  • both tools can move together radially with respect to the tool without affecting their relative position to one another.
  • This can be advantageous in the machining of workpieces having a toothing having a homogeneous wall thickness, in which practically identical embossings or punches are to be performed both on the tooth head and in the base of the tooth.
  • the drive means are moved together by rotation of the coupling element relative to the guide body.
  • the rotation can for example be done manually by an operator or also controlled by a corresponding drive. This allows this movement process in the control of the entire device integrate and thus completely automate the machining process.
  • the short piece is a fraction of the working depth of the punch, i. usually a few 1/100 mm. This can be prevented especially in thin-walled workpieces that jammed the punch in the recess just created and deformed when extending the wall of the workpiece in the extension of the punch.
  • the short drive of the stamp in the same direction the workpiece wall can not deform and the punch can be pulled out in a straight direction from the recess without tilting.
  • the tool holder moves the die to the processing Stele radially opposite inside of the workpiece and brought into abutment, and only then the punch is withdrawn.
  • FIG 1 shows the longitudinal section through an inventive punching device for punching from inside to outside, in the position before the punching operation.
  • FIG. 2 shows the longitudinal section according to FIG. 1 in the position immediately at the end of the stamping process
  • FIG 3 shows the longitudinal section through an inventive punching device for punching from outside to inside, in the position before the punching operation.
  • FIG. 4 shows the longitudinal section according to FIG. 3 in the position immediately at the end of the punching process
  • 5 shows the longitudinal section through a workpiece with three Nuteinstichen with different wall thickness.
  • FIG. 8 shows the partial longitudinal section of a punching device according to the invention according to FIG. 3 with a tool holder in a special position; and
  • FIG. 9 shows the longitudinal section of a stamping device according to the invention in an alternative design.
  • Figure 1 is a schematic longitudinal section through an inventively designed device for punching or
  • a punching is to be performed from the inside of the workpiece forth to the outside.
  • the punch 2 is positioned radially outwardly within the workpiece 1 and the die 3 is positioned radially opposite the punch 2 in relation to the vertical axis V of the workpiece 1.
  • Both punch 2 and die 3 are arranged in this position before the actual punching process away from the surface of the workpiece 1, so that the workpiece 1 can be rotated about its vertical axis V in the desired position and optionally also in height with respect to the Actual axis W of punch 2 and die 3 can be moved vertically and adjusted.
  • the punch 2 is arranged on a tool carrier 4, which is designed in a longitudinal section L-shaped and has two parallel guide rods 5, which are arranged in a guide body 6 parallel to the axis of action W of punch 2 and die 3 slidably.
  • a first tool drive 7 is arranged, which has a stator 8 connected to the guide rods 5 and a rotor 9 arranged centrally therein.
  • Tool drive 7 is advantageously designed as a torque motor, which allows a very good and in particular precise control at high transmittable torque.
  • the die 3 is in turn arranged on a second tool carrier 10, which also has two guide rods 11 arranged in parallel. These guide rods 11 are passed through the first tool carrier 4 and slidably disposed in the guide body 6 parallel to the axis of action W.
  • a second tool drive 12 is arranged, which is identical to the first tool drive 7 and a connected to the guide rods 11 stator 13 and a rotor 14 disposed therein centrally has a second torque motor.
  • the two rotors 9 resp. 14 of the two tool drives 7 and 12 are mounted on a common threaded rod 15, which respectively as a coupling element between the tool drive 7. 12 and the guide body 6 is used.
  • this connection can be realized virtually no play. Due to the well-defined geometric relationships between the tools, i. the stamp 2 resp. Die 3, and the workpiece 1 can thus very precise machining by appropriate control of the tool drives 7 respectively. 12 can be achieved.
  • Tool carrier 4 resp. 10 independent of each other precisely along the axis W against the workpiece 1 delivered resp. be extended. This allows both positioning movements as well as the actual Work movements can be performed easily, precisely and quickly.
  • Figure 2 the longitudinal section of Figure 1 is in the final position of the tools, i. of punch 2 and die 3, for example, shown in the case of a punching.
  • non-axisymmetric workpieces 1 can be machined, i.
  • non-circular workpieces 1 by taking into account when rotating the workpiece 1 about its vertical axis V for the execution of punching or embossing on the entire circumference of each lying in the axis of action W radius of the wall of the workpiece 1 for the positioning and delivery of the tools.
  • the tool carrier 4 advantageously has a substantially L-shaped cross-section and has an upwardly in the cavity of the workpiece 1 retractable hooks 4a.
  • the width of this hook 4a is smaller than the inner diameter of the workpiece 1, so that the hook 4a together with the attached at its upper end tool, e.g. the die 3, radially with respect to the wall of the workpiece 1 can be moved freely.
  • tool holders are arranged to hold the tools, i. Stamp 2 and die 3, detachable with the respective tool carrier 4, respectively. 10 to connect.
  • FIGS. 5 and 8 now show the longitudinal resp. Cross section through a workpiece 1, which has a profiling in the longitudinal direction, ie substantially parallel to the vertical axis V.
  • the wall thickness along the depth of the workpiece 1 is not the same size, but has a conical shape of a different thickness dl .. d2.
  • stamp 2 and die 3 must be delivered differently at each depth tl to t3.
  • the process had to be interrupted and the tools had to be readjusted for each machining depth resp. different control discs are introduced in the drive of the tools, or the processing had to be performed on different workstations.
  • the device according to the invention now allows the machining of such workpieces 1 in a single operation, by a different programming of the control of the tool drives 7 and 12 takes place only for each different depth tl to t3. With known geometrical conditions, this can be done in advance, so that no interruption occurs in the production process and thus a shorter overall production time is realized with high accuracy.
  • no complete punching is carried out with material ejection, but at the processing site 16, the material of the workpiece 1 is bent outwardly as a bead 17, wherein each top and bottom, a gap is formed.
  • the inventive device resp. Method for the machining of above-mentioned profiled workpieces 1, in which punches are to be created both in the tooth base 1 'as well as in the tooth head 1' 'along the circumference of the workpiece 1, as shown in Figure 7.
  • the positioning of the tools, ie of the punch 2 and the die 3, respectively alternately to the corresponding radius rl resp. r2 are adjusted, whereas the actual machining movement with identical wall thickness in the tooth base 1 'as in the tooth head 1''can be maintained. But even if these should be different, this can be easily compensated with the device according to the invention without this affecting the processing time.
  • any stamping or embossing mold can be optimally pre-selected according to the material and geometric conditions of the workpiece 1, respectively. be set.
  • the speed of movement of punch 2 and die 3 as well as the direction of movement can be adjusted flexibly.
  • This property can be used, for example, the die 3 in the retraction movement of the punch 2 after embossing resp. Punch first a small piece in the same direction of movement as the stamp 2 to run. This can be advantageous to prevent tilting of the punch 2 in the recess just created. By such tilting otherwise accidental deformation of the workpiece 1 can occur at the processing site and damage the workpiece 1 or unusable. Such a movement is typically in the range of a few hundredths of a millimeter.
  • the die 3 can advantageously be lifted off the wall of the workpiece 1 after each punching or embossing operation, so that upon rotation of the workpiece 1 about its Vertical axis V or moving along its vertical axis V for positioning for the subsequent punching or embossing process the formation of a burr or grinding marks in the workpiece surface can be avoided.
  • the inventive method is a rational punching resp. Embossing particular cylinder walls of hollow cylindrical workpieces 1 created that is flexible and easy to adjust and achieves precise results. It is clear to those skilled in the art how such a device is constructed, in particular how the tool holder and the machine frame are to be formed, even if in the figures of the examples, only the workpieces and with The device associated guide body 6 are shown schematically.
  • FIG. 9 schematically shows the longitudinal section through an apparatus according to the invention, alternatively configured, for punching or embossing hollow-cylindrical workpieces 1.
  • the die 3 is arranged on a tool carrier 4, which is designed in a longitudinal section L-shaped and two parallel guide rods 5, which are arranged in a guide body 6 parallel to the axis of action W of punch 2 and die 3 slidably.
  • a first designed as a torque motor tool drive 7 is arranged, which has a stator 8 connected to the stator 8 and a rotor 9 arranged centrally therein.
  • the punch 2 is in turn arranged on a second tool carrier 10, which also has two guide rods 11 arranged in parallel. These guide rods 11 are now arranged to be displaceable parallel to the active axis W in the first tool carrier 4.
  • a second designed as a torque motor tool drive 12 is arranged, which is analogous to the first tool drive 7 and connected to the guide rods 11 stator 13 and a centrally disposed rotor 14 therein.
  • the two rotors 9 resp. 14 of the two tool drives 7 and 12 are respectively on its own threaded rod 15, respectively. 15 'stored, which as a coupling element between Tool drive 7 resp. 12 and the guide body 6 respectively. the first tool carrier 4 is used.
  • this connection can be realized virtually no play. Due to the well-defined geometric relationships between the tools, ie the stamp 2 resp. Die 3, and the workpiece 1 can thus very precise machining by appropriate control of the tool drives 7 respectively. 12 can be achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Punching Or Piercing (AREA)

Abstract

Dispositif pour découper ou estamper des pièces cylindriques creuses (1), avec un poinçon (2) et une matrice (3) qui, en coopérant dans un axe d'action (W), peuvent être approchés radialement contre la surface intérieure ou extérieure de la pièce (1) dans des positions prédéfinies par rapport à l'axe vertical (V) de la pièce (1). Dans un mode de réalisation, ce dispositif comporte un corps de guidage commun (6) dans lequel les deux moyens de guidage (5; 11) respectivement accouplés au poinçon (2) et à la matrice (3) sont disposés de manière à coulisser parallèlement entre eux et parallèlement à l'axe d'action (W). Les moyens de guidage (5; 11) présentent un moyen d'entraînement respectif (7; 12), de préférence à commande électronique, qui est positivement relié au corps de guidage (6) et peut être déplacé par rapport au corps de guidage (6) lorsqu'il est activé. On peut ainsi commander individuellement les mouvements du poinçon (2) et de la matrice (3) d'une manière très précise et rapide, ce qui permet d'effectuer avec une grande souplesse quasiment n'importe quelle séquence de mouvements en vue d'un découpage ou un estampage prédéterminé de la pièce (1). La liaison positive entre les moyens d'entraînement (7; 12) et le corps de guidage (6) permet une bonne transmission des forces même pour des forces très élevées, comme on peut en rencontrer lors d'un découpage ou d'un estampage, et même pour de très petites courses de déplacement.
PCT/EP2006/065260 2006-08-11 2006-08-11 Machine de découpage et d'estampage WO2008017327A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/065260 WO2008017327A1 (fr) 2006-08-11 2006-08-11 Machine de découpage et d'estampage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/065260 WO2008017327A1 (fr) 2006-08-11 2006-08-11 Machine de découpage et d'estampage

Publications (1)

Publication Number Publication Date
WO2008017327A1 true WO2008017327A1 (fr) 2008-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/065260 WO2008017327A1 (fr) 2006-08-11 2006-08-11 Machine de découpage et d'estampage

Country Status (1)

Country Link
WO (1) WO2008017327A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011057958A1 (fr) * 2009-11-10 2011-05-19 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Entraînement de presse et procédé de production d'un mouvement de levage d'un support d'outil au moyen d'un entraînement de presse
DE102009044678B4 (de) * 2008-11-27 2012-02-02 Leiber Group Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung einer formschlüssigen Verbindung von unterschiedlichen topfförmigen Bauteilen einer Bremstrommel
CN109158475A (zh) * 2018-11-22 2019-01-08 合肥长安汽车有限公司 一种新型模具液压冲孔结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284321A2 (fr) * 1987-03-23 1988-09-28 Allied Products Corporation Procédé et appareil pour bosseler la paroi d'une pièce en forme de godet
DE29711993U1 (de) * 1997-06-06 1997-11-06 Chih, Chen-keng, Taichung Vorrichtung zum Stanzen von Löchern in eine Fahrradfelge
EP1074320A1 (fr) * 1999-07-27 2001-02-07 ERNST GROB AG, Kaltwalzmaschinen Machine de poinçonnage et d'estampage
EP1600224A1 (fr) * 2004-05-27 2005-11-30 Trumpf Werkzeugmaschinen GmbH + Co. KG Machine avec mécanisme de levage pour travailler une pièce avec un outil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284321A2 (fr) * 1987-03-23 1988-09-28 Allied Products Corporation Procédé et appareil pour bosseler la paroi d'une pièce en forme de godet
DE29711993U1 (de) * 1997-06-06 1997-11-06 Chih, Chen-keng, Taichung Vorrichtung zum Stanzen von Löchern in eine Fahrradfelge
EP1074320A1 (fr) * 1999-07-27 2001-02-07 ERNST GROB AG, Kaltwalzmaschinen Machine de poinçonnage et d'estampage
EP1600224A1 (fr) * 2004-05-27 2005-11-30 Trumpf Werkzeugmaschinen GmbH + Co. KG Machine avec mécanisme de levage pour travailler une pièce avec un outil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009044678B4 (de) * 2008-11-27 2012-02-02 Leiber Group Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung einer formschlüssigen Verbindung von unterschiedlichen topfförmigen Bauteilen einer Bremstrommel
WO2011057958A1 (fr) * 2009-11-10 2011-05-19 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Entraînement de presse et procédé de production d'un mouvement de levage d'un support d'outil au moyen d'un entraînement de presse
CN102574188A (zh) * 2009-11-10 2012-07-11 通快机床两合公司 压力机驱动器和用于借助压力机驱动器产生模具支承装置的行程运动的方法
CN109158475A (zh) * 2018-11-22 2019-01-08 合肥长安汽车有限公司 一种新型模具液压冲孔结构

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