EP4026626A1 - Outil de formage, ainsi que procédé d'utilisation d'un outil de formage - Google Patents

Outil de formage, ainsi que procédé d'utilisation d'un outil de formage Download PDF

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Publication number
EP4026626A1
EP4026626A1 EP21212130.5A EP21212130A EP4026626A1 EP 4026626 A1 EP4026626 A1 EP 4026626A1 EP 21212130 A EP21212130 A EP 21212130A EP 4026626 A1 EP4026626 A1 EP 4026626A1
Authority
EP
European Patent Office
Prior art keywords
die
stroke
press
tool part
sheet metal
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.)
Pending
Application number
EP21212130.5A
Other languages
German (de)
English (en)
Inventor
Josip Galovic
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP4026626A1 publication Critical patent/EP4026626A1/fr
Pending 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • 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
    • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height

Definitions

  • the invention relates to a forming tool for producing a shaped sheet metal part according to the preamble of claim 1 and a method for operating a forming tool according to claim 9.
  • a generic forming tool for producing a shaped sheet metal part consists of a stroke-adjustable upper tool part and a lower tool part.
  • the upper tool part has a die
  • the lower tool part has a press table with a punch.
  • a sheet metal blank is placed in an open tool cavity of the forming tool, which is defined between the die and the punch. This is followed by a press stroke, in which the upper tool part is stroke-adjusted from top dead center over a closing path to bottom dead center.
  • a press stroke stop of the upper tool part is in contact with a counter-contour on the lower tool part.
  • the die is spaced apart from the punch by a slight press stroke gap, specifically with the formed sheet metal part being interposed.
  • a start-up process takes place in the press system ( figure 8 ), in which the mutually facing forming surfaces of the die and the punch are finely machined in order to ensure perfect forming of the sheet metal part in series production.
  • the forming tool with idle stroke operated i.e. with a press stroke carried out without a sheet metal blank.
  • a collision ( figure 8 , reference character K) come into contact with the stamp forming surface, which can lead to damage to the die or the stamp.
  • a device with a press and a tool protection system for processing sheet metal workpieces is known.
  • EP 3 243 578 B1 a method and a press tool for producing a shaped sheet metal part are known.
  • From the DE 10 2017 200 022 A1 a device for forming components is known.
  • From the DE 10 2004 059 598 A1 a device for forming and hardening a metal sheet is known.
  • From the DE 10 2004 006 126 A1 a press with a locked ram is known.
  • the object of the invention is to provide a forming tool for producing a shaped sheet metal part, the operation of which can be carried out with greater process reliability than in the prior art.
  • the invention is based on a forming tool whose stroke-adjustable upper tool part has a die, which can be stroke-adjusted during a press stroke from a top dead center via a closing angle to a bottom dead center, in which a press stroke stop of the upper tool part is in contact with a corresponding counter-contour on the lower part of the tool.
  • the upper tool part also has an adjustment unit.
  • the die can be stroke-adjusted in relation to the press stroke stop of the upper tool part, specifically between a lower press stroke position and an upper idle stroke position.
  • the die is adjusted to its lower press stroke position, while in an idle stroke process, the die is adjusted to its upper idle stroke position, in which damage to the punch or die due to die deflection is avoided.
  • the die With a press stroke during sheet metal forming, the die is thus firmly adjusted to its lower press stroke position.
  • the die which is fixed in its press stroke position, is only a slight press stroke gap away from the punch, specifically with the formed sheet metal part being interposed.
  • the press stroke gap is identical to the sheet thickness of the sheet metal part.
  • the die in the case of an idle stroke, that is to say in the case of a press stroke carried out without a sheet metal blank, the die is adjusted to its upper idle stroke position. In this way, when the bottom dead center is reached, the die (in the upper idle stroke position) is spaced apart from the punch by an idle stroke gap which is dimensioned substantially larger than the press stroke gap. In this way, a collision of the die with the punch can be reliably avoided in idle stroke operation despite die deflection.
  • the idle stroke gap can be a few millimeters larger than the press stroke gap. This can be 0.5mm, for example, while the idle stroke gap can be 2mm, for example.
  • the die can be adjusted between the lower press stroke position and the upper idle stroke position via a vertical guide in the upper tool part.
  • the vertical guide can have a support structure on which the die located in the press stroke position is supported with its component weight.
  • the die In the lower press stroke position, the die may be spaced one die stroke from the upper idle stroke position. In the press stroke mode, the die stroke path is blocked or not released by the adjustment unit. In contrast, in idle stroke operation (e.g. in a start-up process), the adjustment unit is to release the die stroke path up to the upper idle stroke position. In this case, the die can be adjusted from its lower press stroke position to its upper idle stroke position.
  • the lower tool part can have at least one sheet metal holder with an adjustable stroke. Its function is to press an inserted sheet metal blank against the die with a predefined sheet metal holding force during the press stroke.
  • the die is thus adjusted in the press stroke over the closing path to bottom dead center, while at the same time the blank holder presses the inserted sheet metal blank against the die with the blank holding force.
  • the sheet metal holder can also be part of the adjustment unit with a dual function.
  • the blank holder can apply an actuating force to the die, by means of which the die is moved from its lower press stroke position to its upper idle stroke position.
  • the adjustment takes place using the stroke path of the dies, which is released by the adjustment unit in idle stroke operation.
  • the adjustment unit can have an adjustment element for releasing and/or blocking the die stroke path.
  • the adjustment element can be adjusted between a release position and a locked position. In the release position, the stroke of the die is released, while in the locked position, the stroke of the die is blocked.
  • the adjustment element can be arranged so as to be adjustable transversely to the vertical direction of the tool.
  • the setting element can preferably be arranged between a base of the upper tool part and the die. In this case, the adjustment element can be implemented in a space-saving manner as a flat profile, for example a plate, which has blocking sections that are thick in material and release sections that are thin in material.
  • the locking portions and the releasing portions of the plate can be alternately registered with die projections.
  • the platen locking portions are located between the upper die and the die bosses.
  • the plate release portions are located between the upper die and the die bosses.
  • the forming tool has a stroke-adjustable upper tool part 1 and a lower tool part 3 .
  • the upper tool part 1 is approximately box-shaped and carries a die 5, while the lower tool part 3 has a press table 7 with a punch 9 mounted thereon in a stationary manner.
  • the die 5 and the stamp 9 limit one in the 1 open mold cavity 11.
  • the lower mold part 3 also has two sheet metal holders 13 with an adjustable stroke, which carry a sheet metal blank 15 inserted into the open mold cavity 11.
  • the upper tool part 1 is mounted on a press ram 17, the stroke of which can be adjusted by means of a working cylinder 18 of a master cylinder arrangement, not shown.
  • the two sheet metal holders 13 can also be stroke-adjusted by means of an auxiliary cylinder arrangement (not shown).
  • the forming tool is in the 1 associated with a press control 19, by means of which the main cylinder arrangement, the auxiliary cylinder arrangement and an adjustment unit 21 can be controlled.
  • the adjustment unit 21 has a plate-shaped adjustment element 23 which is positioned between the die 5 and a bottom 31 of the upper tool part 1 .
  • the plate-shaped setting element 23 can be moved between a release position F ( figure 5 ) and a blocking position S ( 4 ) adjustable.
  • the plate-shaped setting element 23 is formed with blocking sections 25 of thick material and release sections 27 of thin material, which can be brought into alternating contact with matrix projections 29 depending on the setting movement s.
  • the material-thin release sections 27 are implemented in the figures as recesses in the plate-shaped adjustment element 23 .
  • the plate-shaped adjustment element 23 is actuated via a drive 33 which is in signal communication with the press control 19 .
  • the drive 33 can, for example, work mechanically/hydraulically or pneumatically.
  • a core of the invention is that the die 5 is not mounted in a stationary manner on the upper tool part 1, but rather via a vertical guide 35 between a lower press stroke position P ( 1 ) and an upper idle stroke position L ( 6 ) is adjustable.
  • the press stroke H P is divided into two partial strokes H P1 , H P2 .
  • the first partial stroke H P1 ( 2 ) the upper tool part 1 is brought into contact with the sheet metal blank 15 located on the two sheet metal holders 13 .
  • the sheet metal holders 13 press the sheet metal blank 15 with a holding force F H against the die 5.
  • H P2 ( 3 ) the sheet metal blank 15 is pressed against the forming surface of the punch 9.
  • the die 5 is spaced apart from the punch 9 by a slight press stroke gap h P , with the formed sheet metal part being interposed.
  • a return stroke (not shown) is carried out, in which the upper tool part 1 returns to its top dead center OT ( 1 ) is returned.
  • the upper tool part 1 is moved over a first idle partial stroke H L1 ( figure 5 ) adjusted until the die 5 is brought into contact with the two blank holders 13.
  • the second idle stroke partial stroke H L2 ( 7 ) in which the upper tool part 1 is stroke-adjusted with its press stroke stop 37 to bottom dead center UT.
  • the two sheet metal holders 13 press with a stroke-adjustable actuating force Fs ( 6 and 7 ) the die 5 using up the released die stroke path ⁇ m up to the idle stroke position L. Therefore, at the bottom dead center UT ( 7 ) of the idle stroke H L the die 5 over an idle stroke gap h L ( 7 ) spaced from the stamp 9, which is dimensioned significantly larger than the press stroke gap h P ( 3 ).
  • the adjusting unit 21 has a jaw control as a drive on both sides of the press.
  • the jaw control is made up of a vertically adjustable drive jaw 45 and a horizontally adjustable adjusting jaw 47, which interact via inclined control surfaces 43.
  • the adjusting jaw 47 is adjustably mounted in a horizontal carriage guide 47 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP21212130.5A 2021-01-11 2021-12-03 Outil de formage, ainsi que procédé d'utilisation d'un outil de formage Pending EP4026626A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021100281.8A DE102021100281B3 (de) 2021-01-11 2021-01-11 Umformwerkzeug sowie Verfahren zum Betreiben eines Umformwerkzeugs

Publications (1)

Publication Number Publication Date
EP4026626A1 true EP4026626A1 (fr) 2022-07-13

Family

ID=78821632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21212130.5A Pending EP4026626A1 (fr) 2021-01-11 2021-12-03 Outil de formage, ainsi que procédé d'utilisation d'un outil de formage

Country Status (2)

Country Link
EP (1) EP4026626A1 (fr)
DE (1) DE102021100281B3 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232804B (de) * 1961-09-08 1967-01-19 Eumuco Ag Fuer Maschb Verfahren fuer den Betrieb einer kurbelgetriebenen Gesenkschmiedepresse und Einrichtungen an einer Gesenkschmiedepresse zur Durchfuehrung des Verfahrens
DE1652637A1 (de) * 1968-01-19 1970-05-14 Siemens Ag Vorrichtung zur spanlosen Bearbeitung eines Blechbandes
DE2814967A1 (de) * 1978-04-06 1979-10-18 Erich Passow Stanzwerkzeug
JPH09192751A (ja) * 1996-01-19 1997-07-29 Toyota Motor Corp 複合成形型および複合成形方法
DE102004006126A1 (de) 2004-02-07 2005-09-01 Horst Baltschun Presse mit verriegeltem Stößel
DE102004059598A1 (de) 2004-12-09 2006-06-22 Volkswagen Ag Verfahren und Vorrichtung zum Umformen und Härten eines Bleches
US7765848B2 (en) * 2006-04-14 2010-08-03 Honda Motor Co., Ltd. Press working method and press working apparatus
US20150343513A1 (en) * 2013-01-11 2015-12-03 Futaba Industrial Co., Ltd. Hot stamping device
DE102016002765B3 (de) 2016-03-05 2017-06-22 Audi Ag Vorrichtung mit Presse, Werkzeug und Werkzeugschutzsystem zur Bearbeitung von Blechwerkstücken und hierfür verwendbare einstellbare Distanzeinrichtung
DE102017200022A1 (de) 2017-01-02 2018-07-05 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zum Umformen von Bauteilen und Kraftfahrzeug
EP3243578B1 (fr) 2016-05-13 2018-10-03 Audi Ag Procédé et outil de presse destinés à la fabrication d'un moulage en tôle complexe à grande profondeur d'emboutissage
WO2020233903A1 (fr) * 2019-05-20 2020-11-26 Lisa Dräxlmaier GmbH Procédé de commande cyclique d'un poinçon d'un outil de poinçonnage et outil de poinçonnage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008023578A (ja) 2006-07-25 2008-02-07 Ihi Corp プレス機械の金型交換方法及びプレス機械
DE102010027554A1 (de) 2010-07-19 2012-01-19 Thyssenkrupp Umformtechnik Gmbh Umformwerkzeug und Verfahren zum Warmumformen und partiellen Presshärten eines Werkstückes aus Stahlblech
DE102014112325B4 (de) 2014-08-27 2016-12-22 Benteler Automobiltechnik Gmbh Pressumformwerkzeug mit Toleranzausgleich

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232804B (de) * 1961-09-08 1967-01-19 Eumuco Ag Fuer Maschb Verfahren fuer den Betrieb einer kurbelgetriebenen Gesenkschmiedepresse und Einrichtungen an einer Gesenkschmiedepresse zur Durchfuehrung des Verfahrens
DE1652637A1 (de) * 1968-01-19 1970-05-14 Siemens Ag Vorrichtung zur spanlosen Bearbeitung eines Blechbandes
DE2814967A1 (de) * 1978-04-06 1979-10-18 Erich Passow Stanzwerkzeug
JPH09192751A (ja) * 1996-01-19 1997-07-29 Toyota Motor Corp 複合成形型および複合成形方法
DE102004006126A1 (de) 2004-02-07 2005-09-01 Horst Baltschun Presse mit verriegeltem Stößel
DE102004059598A1 (de) 2004-12-09 2006-06-22 Volkswagen Ag Verfahren und Vorrichtung zum Umformen und Härten eines Bleches
US7765848B2 (en) * 2006-04-14 2010-08-03 Honda Motor Co., Ltd. Press working method and press working apparatus
US20150343513A1 (en) * 2013-01-11 2015-12-03 Futaba Industrial Co., Ltd. Hot stamping device
DE102016002765B3 (de) 2016-03-05 2017-06-22 Audi Ag Vorrichtung mit Presse, Werkzeug und Werkzeugschutzsystem zur Bearbeitung von Blechwerkstücken und hierfür verwendbare einstellbare Distanzeinrichtung
EP3243578B1 (fr) 2016-05-13 2018-10-03 Audi Ag Procédé et outil de presse destinés à la fabrication d'un moulage en tôle complexe à grande profondeur d'emboutissage
DE102017200022A1 (de) 2017-01-02 2018-07-05 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zum Umformen von Bauteilen und Kraftfahrzeug
WO2020233903A1 (fr) * 2019-05-20 2020-11-26 Lisa Dräxlmaier GmbH Procédé de commande cyclique d'un poinçon d'un outil de poinçonnage et outil de poinçonnage

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Publication number Publication date
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