EP0920932A1 - Procédé et dispositif de poinçonnage d'une pièce à usiner - Google Patents

Procédé et dispositif de poinçonnage d'une pièce à usiner Download PDF

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Publication number
EP0920932A1
EP0920932A1 EP98120235A EP98120235A EP0920932A1 EP 0920932 A1 EP0920932 A1 EP 0920932A1 EP 98120235 A EP98120235 A EP 98120235A EP 98120235 A EP98120235 A EP 98120235A EP 0920932 A1 EP0920932 A1 EP 0920932A1
Authority
EP
European Patent Office
Prior art keywords
pressure
stamp
workpiece
wall
vibration
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
EP98120235A
Other languages
German (de)
English (en)
Other versions
EP0920932B1 (fr
Inventor
Aribert Prof. Dr.-Ing. Habil. Schwager
Klaus Prof. Dr.-Ing. Siegert
Ralf Dipl.-Ing. Rieger
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.)
Fgu Forschungsgesellschaft Umformtechnik Mbh
Original Assignee
Fgu Forschungsgesellschaft Umformtechnik Mbh
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 Fgu Forschungsgesellschaft Umformtechnik Mbh filed Critical Fgu Forschungsgesellschaft Umformtechnik Mbh
Publication of EP0920932A1 publication Critical patent/EP0920932A1/fr
Application granted granted Critical
Publication of EP0920932B1 publication Critical patent/EP0920932B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a method and a device for punching a workpiece, the workpiece being a Hollow body manufactured by the hydroforming process or can be formed as a sheet-shaped part.
  • One side of the wall of the workpiece becomes one under High pressure pressure medium and the other side of the Action of a stamp guided in a tool exposed, the stamp against the wall of the High pressure of the pressure medium cuts or a Tool designed circumferential cutting edge releases the wall under the influence of a high pressure is cut. It finds a source to deploy a high pressure pressure medium and one Pressure feeder for feeding the print medium into the High pressure room application.
  • So according to DE 40 35 625 A1 describes a method for manufacturing an opening in the wall of a hollow body trained workpiece and a tool for implementation of the method described, the tool in the area the desired breakthrough with a sharp edge of the component-walled cavity is provided to the wall in the direction of this cavity so under pressure to be able to put them on the sharp edge cuts.
  • DE 43 22 063 C1 becomes an internal high pressure forming tool guided stamp initially for the purpose of pre-cutting against the wall under maximum internal pressure and then for the purpose of complete cutting led against the wall under reduced pressure.
  • the cut edges generated have a large Edge shape deviation and a large burr height.
  • the invention has for its object a method and to provide a device for punching a workpiece, the one with lower media and / or stamp pressure less edge shape deviation, a smaller ridge height and ensures a better cutting surface.
  • the workpiece can be used as a hydroforming process manufactured hollow body or as a be sheet-shaped part.
  • One side of the wall the workpiece becomes a high pressure one Print medium and its other side under the influence of a exposed to a tool-guided stamp.
  • the punch either cuts the wall of the workpiece against the effect of the print medium or the stamp a circumferential cutting edge formed on the tool which affects the wall of the workpiece increasing pressure of the print medium (D) cut, free or both are carried out one after the other.
  • the movement of the stamp is in the form of the feed movement when cutting the wall of the workpiece and / or in shape the return stroke movement when releasing the rotating Cutting edge of the tool is overlaid by a vibration and / or the application of the applied to the wall High pressure through the pressure medium (D) occurs in rhythm a vibration.
  • the workpiece can be soaked by the stamp for non-vibrating or vibrating increasing or decreasing high pressure of the pressure medium.
  • the frequency of the vibration of the stamp and / or printing medium is preferably on the order of 5 to 50 Hz. However, it is also possible to use one in the ultrasound range to use.
  • the vibration amplitudes and / or the frequencies of the Vibrations of the stamp and the printing medium can be the same or be different.
  • the device for punching a workpiece on one side of the wall of the workpiece Stamp and on the other side of the wall High pressure room There is also a source to provide a pressurized medium and one Pressure feeder for feeding the print medium into the High pressure room provided.
  • Control device provided with the stamp movement and the vibration of the stamp and / or the high pressure of the Print medium and its vibration superposition controllable are.
  • the device has a tool 2, between which Upper tool part 4 and lower tool part 6 the workpiece 8 pressure-tight is clamped.
  • a stamp 10 is guided by a drive 12 in Direction of the wall of the workpiece 8 (feed movement) and can be moved away from it (return stroke movement).
  • the Lower tool part 6 has a pressure chamber 14 which over a pressure supply 16 with a high pressure source 18 in Connection is established.
  • the drive 12 and the high pressure source 18 are connected to a control device 20 which it allows the stamp movement and / or the pressure of the To control print medium D in rhythm with an oscillation.
  • Fig. 1 issued the control device 20 to the stamp 10 via the Drive 12 one superimposed with an oscillation constant feed in the direction of the wall of the workpiece 8.
  • the stamp 10 for each oscillation period larger piece penetrates into the wall 8 than it out of it retracts, it progresses gradually until it contrary to one of the control device 20 via the Pressure source 18 and the channel 16 maintained has completely penetrated constant high pressure and the cutout is made.
  • the constant High pressure caused by a swinging or non-swinging to replace decreasing high pressure.
  • the stamp 10 by reversing the constant feed swinging from the wall of the To move workpiece 8.
  • the pressure of the Pressure medium D in the pressure chamber 14 may be constant or else oscillating or non-oscillating, for example linear increase. Because the stamp 10 per period of vibration always a larger piece on the tool part 4 revolving cutting edge 22 as he releases it again covered, the wall 8 separates below the higher becoming pressure in the pressure chamber 14 gradually at the Tool 2 circumferential cutting edge 22.
  • FIG. 3 is the path-time diagram of a wall 8 swinging cutting stamp 10 shown.
  • the control device 20 Under the Influence of the control device 20 is due to the drive 12 realized an oscillation with a frequency of 17 Hz has been superimposed.
  • the amplitude of the resulting feed vibration exhibits e.g. one positive proportion of 0.06 mm / s and a negative proportion from 0.04 mm / s.
  • the stamp penetrates 10 with low cutting force in the wall of a workpiece and leaves a high quality perforation.
  • Ultrasonic vibration provided by ultrasonic transducers achieve, whose frequency is preferably 20 kHz.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP98120235A 1997-10-28 1998-10-28 Procédé et dispositif de poinçonnage d'une pièce à usiner Expired - Lifetime EP0920932B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19747607 1997-10-28
DE19747607A DE19747607A1 (de) 1997-10-28 1997-10-28 Verfahren und Vorrichtung zum Lochen eines Werkstückes

Publications (2)

Publication Number Publication Date
EP0920932A1 true EP0920932A1 (fr) 1999-06-09
EP0920932B1 EP0920932B1 (fr) 2001-08-08

Family

ID=7846886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120235A Expired - Lifetime EP0920932B1 (fr) 1997-10-28 1998-10-28 Procédé et dispositif de poinçonnage d'une pièce à usiner

Country Status (4)

Country Link
EP (1) EP0920932B1 (fr)
AT (1) ATE203937T1 (fr)
DE (2) DE19747607A1 (fr)
ES (1) ES2162380T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016177824A1 (fr) * 2015-05-04 2016-11-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé servant au cisaillement de matériaux à haute résistance et ensemble formant outil de coupe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10360738B4 (de) * 2003-12-23 2006-02-02 Daimlerchrysler Ag Verfahren und Umformwerkzeug zum Durchtrennen eines Hohlprofils
DE102024201040A1 (de) * 2024-02-06 2025-08-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Vorrichtung und Verfahren zum Bearbeiten eines flächigen Halbzeugs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989482A (en) * 1989-11-17 1991-02-05 Ti Corporate Services Limited Method and apparatus for punching a hole in sheet material
DE4322063C1 (de) * 1993-07-02 1994-08-18 Schaefer Maschbau Wilhelm Verfahren und Vorrichtung zum Ausschneiden eines Ausschnittes aus einer Wandung eines nach dem Innhochdruck-Umformverfahren hergestellten Hohlkörpers
US5398533A (en) * 1994-05-26 1995-03-21 General Motors Corporation Apparatus for piercing hydroformed part
DE19506067C1 (de) * 1995-02-22 1996-06-20 Krupp Ag Hoesch Krupp Verfahren zum Ausschneiden eines Ausschnitts aus der Wandung eines als Hohlkörper ausgebildeten Bauteils und Vorrichtung zur Durchführung des Verfahrens

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4035625A1 (de) * 1990-11-09 1992-05-14 Audi Ag Verfahren zum herstellen eines durchbruches in der wandung eines als hohlkoerper ausgebildeten werkstueckes und werkzeug zur durchfuehrung des verfahrens
DE4441192C2 (de) * 1994-11-18 1998-05-20 Schnupp Gmbh & Co Hydraulik Kg Verfahren zum Innenhochdruck-Umformen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989482A (en) * 1989-11-17 1991-02-05 Ti Corporate Services Limited Method and apparatus for punching a hole in sheet material
DE4322063C1 (de) * 1993-07-02 1994-08-18 Schaefer Maschbau Wilhelm Verfahren und Vorrichtung zum Ausschneiden eines Ausschnittes aus einer Wandung eines nach dem Innhochdruck-Umformverfahren hergestellten Hohlkörpers
US5398533A (en) * 1994-05-26 1995-03-21 General Motors Corporation Apparatus for piercing hydroformed part
DE19506067C1 (de) * 1995-02-22 1996-06-20 Krupp Ag Hoesch Krupp Verfahren zum Ausschneiden eines Ausschnitts aus der Wandung eines als Hohlkörper ausgebildeten Bauteils und Vorrichtung zur Durchführung des Verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016177824A1 (fr) * 2015-05-04 2016-11-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé servant au cisaillement de matériaux à haute résistance et ensemble formant outil de coupe
DE102015106859A1 (de) * 2015-05-04 2016-11-10 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Scherschneiden hochfester Werkstoffe und Schneidwerkzeuganordnung
DE102015106859B4 (de) 2015-05-04 2018-06-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Scherschneiden hochfester Werkstoffe und Schneidwerkzeuganordnung

Also Published As

Publication number Publication date
EP0920932B1 (fr) 2001-08-08
DE19747607A1 (de) 1999-05-06
ES2162380T3 (es) 2001-12-16
ATE203937T1 (de) 2001-08-15
DE59801162D1 (de) 2001-09-13

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