EP3315224A1 - Presse zum umformen eines blechrohlings sowie wartungsverfahren einer solchen presse - Google Patents

Presse zum umformen eines blechrohlings sowie wartungsverfahren einer solchen presse Download PDF

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Publication number
EP3315224A1
EP3315224A1 EP17192626.4A EP17192626A EP3315224A1 EP 3315224 A1 EP3315224 A1 EP 3315224A1 EP 17192626 A EP17192626 A EP 17192626A EP 3315224 A1 EP3315224 A1 EP 3315224A1
Authority
EP
European Patent Office
Prior art keywords
blank holder
press
blank
die
lateral
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
EP17192626.4A
Other languages
English (en)
French (fr)
Other versions
EP3315224B1 (de
Inventor
Jean Richard SPERA
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.)
PSA Automobiles SA
Original Assignee
PSA Automobiles SA
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 PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP3315224A1 publication Critical patent/EP3315224A1/de
Application granted granted Critical
Publication of EP3315224B1 publication Critical patent/EP3315224B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
    • B21D25/02—Working sheet metal of limited length by stretching, e.g. for straightening by pulling over a die
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor

Definitions

  • the present invention relates to a press for shaping, by a stamping process, a sheet blank.
  • the invention also relates to a method of maintaining such a press.
  • the invention relates to a press which comprises a die and a punch adapted to stamp a sheet blank during the descent of the die against the punch.
  • the press comprises a blank holder which is vertically guided in translation from a first high position to a second low position when the die is lowered against the punch.
  • the blank holder has at least two movable parts between them, such that the first part has a lateral displacement relative to the second part.
  • the blank holder also comprises first return means interposed between said first portion and said second portion of the blank holder.
  • Such a method is for example particularly advantageous for shaping a sheet blank to form a roof of a motor vehicle, in particular a roof of a motor vehicle of large size such as a commercial vehicle.
  • return means such as pneumatic or hydraulic springs, which compressing during the stamping operation, gradually tend the sheet blank.
  • This type of press generally presents problems for maintenance, because during the dismantling of part of the greenhouses, it is necessary to immobilize these return means beforehand. Except such a step lengthens the maintenance operation and represents a danger in the event of inappropriate release of these return means. But these means of recall are essential to the operation of a press type "Stretch Draw".
  • the object of the invention is to overcome this problem and to propose a press intended to form a sheet blank, by way of a "stretch-draw" type drawing process, in particular a sheet blank intended to form a roof of sheet metal.
  • a large motor vehicle such as a commercial vehicle.
  • Such a press must allow the performance of maintenance operations without requiring many preparation operations consisting of blocking all return means, to allow disassembly of moving parts such as greenhouses and this in a simple and secure manner.
  • the subject of the invention is a press intended to form a sheet blank using a stamping process, comprising a die and a punch adapted to stamp the blank of sheet metal during the descent of the die against the punch.
  • said press comprising a blank holder which is vertically guided in translation from a first up position to a second down position upon descent of the die against the punch.
  • the blank holder has at least two movable parts between them, such that the first part has a lateral displacement relative to the second part.
  • the blank holder also comprises first return means interposed between said first portion and said second portion of the blank holder, such that the first return means, in the low position of the blank holder, are arranged to present a positioning said relaxed.
  • the second part of the blank holder in said lower position of the blank holder, is in lateral support against the first part of the blank holder.
  • the matrix comprises a lateral part adapted to collaborate with the first part of the blank holder to block a lateral edge of the sheet blank, said lateral part comprising second return means adapted to oppose the lateral movement towards the outside of the press of the first part of the blank holder during the descent of the die.
  • the second part of the blank holder is connected to the frame of the press by means of a rod adapted to laterally move said second part of the blank holder during the descent of the die.
  • the connecting rod has a first end integral with the second portion of the blank holder and a second end secured to the frame, the first end and the second end of the rod form respectively with the second part of the blank holder and with the frame of the pivot type connection means.
  • the blank holder comprises a third portion which comprises guide means for vertically translational guide said blank holder.
  • the third part of the blank holder forms a support along which are guided laterally in translation the first part and the second part of the blank holder.
  • the third part of the blank holder has a side wall which forms a stop adapted to limit the lateral displacement towards the punch of the first part of the blank holder.
  • the first return means are adapted to maintain the first part of the blank holder against the abutment of the third part of the blank holder.
  • the present invention also relates to a method of maintaining a press according to any one of the preceding claims, such that, the blank holder being previously positioned in the lower position, said method comprises a step of dismounting the first part of the clamp. blank and a step of reassembly of said first part without changing the operation of the first return means.
  • the figures 2 , 3 and 4 are partial side views, in section, of the press 1 at different stages of the stamping process of the sheet blank 2.
  • the die 5 of the press 1 starts its descent towards the punch 3.
  • the lateral portion 51 of the die 5 bears against the first portion 41 of the blank holder 4.
  • a rod 22 adapted to block the side edge 21 of the sheet blank 2 between the lateral portion 51 of the die 5 and the first portion 41 of the blank holder 4.
  • the die 5 of the press 1 continues its descent towards the punch 3, leading with it a first descent phase of the blank holder 4.
  • the push rods 45 of the greenhouse -flan 4 begins to be compressed, creating a restoring force opposing the descent of the matrix 5.
  • the clamping force of the side edge 21 of the sheet blank 2 between the lateral portion 51 of the die 5 and the first part 41 of the blank holder 4 increases accordingly.
  • the connecting rod 6 pivots with a first angle ⁇ 1 sliding the second part 42 of the blank holder 4, which forms a piston, against the first bearing surface 411 of the first part 41 of the greenhouse -flan 4.
  • the first return means 44 are in a so-called relaxed positioning, causing the free end of the control rod 443 of the piston 441 of the first return means 44 to no longer exert a restoring force against the second bearing surface 412 of the first portion 41 of the blank holder 4.
  • the die 5 of the press 1 is in contact with the punch 3, allowing the press 1 to shape the sheet blank 2.
  • the lateral portion 51 of the die assembly 5 and blank holder 4 are spaced apart by a distance d 1 from the central portion 54 of the die 5 and the punch 3.
  • This gap d 1 makes it possible to tension the sheet blank 2 during the stamping phase.
  • This spacing d 1 results from the pivoting of the connecting rod 6 by a second angle ⁇ 2 , further sliding the second portion 42 of the blank holder 4 against the first bearing surface 411 of the first portion 41 of the blank holder 4.
  • the first return means 44 remain in a relaxed position.
  • the blank holder 4 is in its lower position as defined above.
  • FIGS. 5 , 6 and 7 represent partial side views in section of the press during different maintenance steps of the press according to the invention.
  • the entire upper part of the press is removed, allowing maintenance operations of the press 1.
  • the blank holder 4 is previously positioned in the low position and the push rods 45 are partially disassembled.
  • the removal of the first portion 41 of the blank holder 4 is done without modifying the operation of the first return means 44, thereby simplifying the disassembly and reassembly of the first part. 41 of the blank holder 4.
  • the upper part of the press ie the die 5
  • the punch 3 and the blank holder 4 The push rods 45 are not yet raised and the whole press is not not yet returned to his work site.
  • the second return means 53 of the matrix 5 position the lateral part 51 in lateral support against the central portion 54 of the matrix 5.
  • the blank holder 4 is in the lower position, so that the first part 41 of the blank holder 4 is spaced from the spacing d 1 of the third portion 43 of the blank holder 4. This results in a problem of alignment of the lateral portion 51 of the blank with the blank holder 4.
  • the oblique bearing surface 522 of the second key 52 of the lateral portion 51 of the die 5 abuts against the oblique bearing surface 415 of the first key 46 of the blank holder 4.
  • the sliding of these oblique bearing surfaces 415 and 522 against each other aligns the side portion 51 of the die 5 opposite the first portion 41 of the blank holder 4 , by opposing the second return means 53 of the matrix 5.
  • the lateral portion 51 of the die 5 is correctly aligned with the first portion 41 of the blank holder 4.
  • the gap d 1 is found well between the lateral portion 51 and the central portion 54 of the die 5.
  • the press 1 can now be repositioned along the production line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP17192626.4A 2016-10-26 2017-09-22 Presse zum umformen eines blechrohlings sowie wartungsverfahren einer solchen presse Active EP3315224B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1660369A FR3057791B1 (fr) 2016-10-26 2016-10-26 Presse destinee a mettre en forme un flan de tole et procede de maintenance d’une telle presse

Publications (2)

Publication Number Publication Date
EP3315224A1 true EP3315224A1 (de) 2018-05-02
EP3315224B1 EP3315224B1 (de) 2020-04-08

Family

ID=57750222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17192626.4A Active EP3315224B1 (de) 2016-10-26 2017-09-22 Presse zum umformen eines blechrohlings sowie wartungsverfahren einer solchen presse

Country Status (3)

Country Link
EP (1) EP3315224B1 (de)
ES (1) ES2784708T3 (de)
FR (1) FR3057791B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459025A (en) 1967-12-07 1969-08-05 Cyril Bath Co Stretching fixture with quadrilateral linkage control of stretch head movements
EP1047511A1 (de) * 1997-09-18 2000-11-02 Cosma International Inc. Streck- und ziehwerkzeug und zugehöriges verfahren
DE10334483A1 (de) 2003-07-29 2005-03-10 Daimler Chrysler Ag Verfahren und Ziehwerkzeug zum Herstellen eines Blechteils aus einer Platine
EP2754509A1 (de) * 2011-09-09 2014-07-16 M's Inc. Pressformverfahren und pressformvorrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012097812A1 (de) * 2011-01-21 2012-07-26 Giw Verwaltungs- Und Vertriebs Gmbh Verfahren und vorrichtung zum ziehen von blechen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459025A (en) 1967-12-07 1969-08-05 Cyril Bath Co Stretching fixture with quadrilateral linkage control of stretch head movements
EP1047511A1 (de) * 1997-09-18 2000-11-02 Cosma International Inc. Streck- und ziehwerkzeug und zugehöriges verfahren
DE10334483A1 (de) 2003-07-29 2005-03-10 Daimler Chrysler Ag Verfahren und Ziehwerkzeug zum Herstellen eines Blechteils aus einer Platine
EP2754509A1 (de) * 2011-09-09 2014-07-16 M's Inc. Pressformverfahren und pressformvorrichtung

Also Published As

Publication number Publication date
ES2784708T3 (es) 2020-09-30
EP3315224B1 (de) 2020-04-08
FR3057791B1 (fr) 2018-11-23
FR3057791A1 (fr) 2018-04-27

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