EP1362650A2 - Outil d' étirage-emboutissage - Google Patents

Outil d' étirage-emboutissage Download PDF

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Publication number
EP1362650A2
EP1362650A2 EP03008130A EP03008130A EP1362650A2 EP 1362650 A2 EP1362650 A2 EP 1362650A2 EP 03008130 A EP03008130 A EP 03008130A EP 03008130 A EP03008130 A EP 03008130A EP 1362650 A2 EP1362650 A2 EP 1362650A2
Authority
EP
European Patent Office
Prior art keywords
stretch
tool
stretching
tool according
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.)
Granted
Application number
EP03008130A
Other languages
German (de)
English (en)
Other versions
EP1362650B1 (fr
EP1362650A3 (fr
Inventor
Peter Broll
Thomas Patz
Frank Werner
Michael Reissig
Michael Bittner
Ralf Dietrich
Josef Reiser
Roland Oppenländer
Martin Grosz
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1362650A2 publication Critical patent/EP1362650A2/fr
Publication of EP1362650A3 publication Critical patent/EP1362650A3/fr
Application granted granted Critical
Publication of EP1362650B1 publication Critical patent/EP1362650B1/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
    • 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
    • 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

Definitions

  • the invention relates to a stretch-drawing tool according to the preamble of claim 1.
  • the object of the invention is a stretch-drawing tool of the type mentioned To create a way that is simple in terms of construction and control exact stretch drawing deformation of a sheet metal plate is guaranteed.
  • the die can be moved in height arranged on the lower part of the tool and the top of the die when inserting the sheet metal board at the same height as the clamping surfaces of the lower, extended stretching slide must be raised, causing a deflection the sheet metal plate when inserting it into the stretch-drawing tool uncontrolled stretching of the sheet metal blank is effectively prevented.
  • the forming die is lowered in front of the stretching slides, whereby the lowering path of the die and because of the stroke-dependent positively controlled lateral extension movement of the stretching slide consequently also the degree of pre-stretching the sheet metal plate is variably adjustable.
  • the Tool parts with effective molding surfaces after the stretch-drawing process provided for forming a deep-drawing step are provided for forming a deep-drawing step.
  • Edge deep-drawing stages are preferably made using a deep-drawing die in the tool top and an assigned one, to the form stamp in the area the counterholder adjacent to the deep-drawing stages is formed in the lower part of the tool, which for reasons of constructive simplification at the same time during of the stretching process as conforming to the surface of the punch subsequent sheet metal holder acts as synchronized with the activation for this purpose the stretching slide is designed to be a flexible sheet metal holder ring is.
  • the stretch-drawing tool shown in the figure is used to produce a two-dimensional curved motor vehicle roof skin and contains as main components a tool base and which can be installed in a conventional drawing press - Upper part 1, 2, one with limited stroke movement in the lower part 1, raised by the lower air cushion 3 into the upper lifting position (FIG. 2)
  • the die 4 is enclosed by a sheet metal holder ring 7, which is in the lower tool 1 positioned on a controllable hydraulic block 8 and on his Non-stretch slide, widened narrow sides with a bead-shaped Well 9 (Fig. 1) is provided. Opposite the sheet metal holder ring 7 in the bead area is located on the upper tool 2 from the upper air cushion 10 pressurized hold-down device 11, which corresponds to the bead 9 on its end face Form nose 12 has.
  • the tool is completed by a die 13 attached to the upper part 2 for forming a circumferential one Deep-drawing step in the edge area of the outer roof skin and one on the molding surface 14 of the die 13 adjacent additional hold-down 15, through the air cushion 10 is pressed into the extended position (Fig. 2 and 3) and in the outer edge area is designed with the same contour as the stamp surface 5.
  • the stretching slide 6 are in linear guides 16 of the lower or upper tool 1, 2, which are at the same angles with respect to the tool stroke direction are inclined obliquely towards the inside of the tool, but can be moved non-rotatably mounted, their extension stroke by preferably adjustable (not shown) stops is limited.
  • On their mutually facing clamping surfaces 17 are the stretching slides 6 with corresponding corrugations 18 provided that the downward stroke of the tool parts 1, 2 to form Interlocking beads in the intervening sheet metal plate 19 interlock positively, so that the stretching slide 6 during the further closing stroke of the upper tool 2 forcibly the same movement in the linear guides 16 pushed back and at the same time in a lateral direction perpendicular to the lifting movement of the upper tool 2 are extended without it being one complicated slide and wedge arrangement required.
  • the stretching slides 6 are each through a housed inside the slide in the direction of the linear guide 16 effective hydraulic cushion 20 depending on the force applied.
  • the hydraulic cushion 20 is over e.g. solenoid-controlled switching valve 21 with a Low-pressure accumulator 22, approximately in the form of a rubber membrane 23 in an air chamber and a hydraulic chamber 24, 25 divided storage chamber.
  • a Low-pressure accumulator 22 approximately in the form of a rubber membrane 23 in an air chamber and a hydraulic chamber 24, 25 divided storage chamber.
  • Valve 21 turns to the right into the unlock position reversed, the stretching slide 6 under the pressure effect of the low pressure accumulator 22 acted upon in the extension direction.
  • the stretching slide 6 on the linear guides 16 continue pushed back and apart, so that the clamped in between Sheet metal plate 19 is pre-stretched until it forms the die surface again 5 touches.
  • the degree of pre-stretching is in the range of the 0.2 proof stress and leaves adjust themselves variably by appropriate height positioning of the stops 27.
  • the one applied by the upper air cushion 10 sets Hold-down device 11 on the hydraulically locked and the same shape the mold surface 5 of the lowered die 4 subsequent sheet metal holder ring 7 and forms in the bead area 9 on the edges of the sinker-free board a pull bead (Fig. 3).
  • the shape-forming stretch-drawing phase now begins, in which the sheet metal plate 19 with further retraction of the stretching slide 6 more and more to the Shaped surface 5 of the die 4 is molded until it is full on this is present (Fig. 4).
  • the additional hold-down device sets when the stretch-drawing deformation is complete 15 approximately at the same time as the die 13 on the sheet metal plate 19 on, and at the same time the sheet metal holder ring 7 by the hydraulic block 8 switched flexibly and by actuating the upper air cushion 10 via corresponding upper air compensation bolts located in the lower tool 1 (not shown) the blocking effect of the hold-down device 11 in the bead area 9 is released and the counterforce generated by the hydraulic cushion 20 by unlocking of the control valve 21 reduced.
  • Fig. 5 shows the tool at the end of the deep drawing phase.
  • the stretch-drawing tool is used in conjunction with a conventional drawing press used, it is also entirely possible within the scope of the invention the hydraulic system on the press side for pressure control of the stretching slide 6 and the sheet metal holder ring 7 to use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
EP20030008130 2002-05-18 2003-04-08 Outil d' étirage-emboutissage Expired - Lifetime EP1362650B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10222314 2002-05-18
DE2002122314 DE10222314A1 (de) 2002-05-18 2002-05-18 Streckziehwerkzeug

Publications (3)

Publication Number Publication Date
EP1362650A2 true EP1362650A2 (fr) 2003-11-19
EP1362650A3 EP1362650A3 (fr) 2005-10-05
EP1362650B1 EP1362650B1 (fr) 2007-07-11

Family

ID=29265371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030008130 Expired - Lifetime EP1362650B1 (fr) 2002-05-18 2003-04-08 Outil d' étirage-emboutissage

Country Status (3)

Country Link
EP (1) EP1362650B1 (fr)
DE (2) DE10222314A1 (fr)
ES (1) ES2287377T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897001A3 (fr) * 2006-02-06 2007-08-10 Renault Sas 02ocede et outil d'emboutissage d'un flan metallique.
ITTO20100687A1 (it) * 2010-08-09 2012-02-10 E M A R C S P A Dispositivo e procedimento per la piegatura con stiramento di pezzi metallici
WO2012037915A1 (fr) * 2010-08-09 2012-03-29 Giw Gesellschaft Für Innovative Werkzeugsysteme Mbh Procédé et dispositif d'emboutissage de tôles
WO2012045292A1 (fr) * 2010-10-04 2012-04-12 Giw Gesellschaft Für Innovative Werkzeugsysteme Mbh Procédé et dispositif d'emboutissage de tôles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056315A1 (de) 2009-12-01 2011-06-09 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Detroit Streckziehvorrichtung und Verfahren zum Streckziehen eines Werkstücks sowie streckgezogenes Teil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1602551A1 (de) * 1967-05-13 1971-03-11 Siempelkamp Gmbh & Co Hydraulische Streckpresse
DE3206212A1 (de) * 1981-03-21 1982-10-14 SMS Schloemann-Siemag AG, 4000 Düsseldorf Spannkopf eines blechstreckers mit einer zentriervorrichtung
FR2646623A1 (en) * 1989-05-03 1990-11-09 Peugeot Press tool for deep-drawing slightly shaped workpieces
WO1999014001A1 (fr) * 1997-09-18 1999-03-25 Cosma International Inc. Matrice d'emboutissage par etirage et procede associe
US6041639A (en) * 1999-02-09 2000-03-28 The Boeing Company Method and apparatus for stretch-forming and shearing sheet metal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1602551A1 (de) * 1967-05-13 1971-03-11 Siempelkamp Gmbh & Co Hydraulische Streckpresse
DE3206212A1 (de) * 1981-03-21 1982-10-14 SMS Schloemann-Siemag AG, 4000 Düsseldorf Spannkopf eines blechstreckers mit einer zentriervorrichtung
FR2646623A1 (en) * 1989-05-03 1990-11-09 Peugeot Press tool for deep-drawing slightly shaped workpieces
WO1999014001A1 (fr) * 1997-09-18 1999-03-25 Cosma International Inc. Matrice d'emboutissage par etirage et procede associe
US6041639A (en) * 1999-02-09 2000-03-28 The Boeing Company Method and apparatus for stretch-forming and shearing sheet metal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897001A3 (fr) * 2006-02-06 2007-08-10 Renault Sas 02ocede et outil d'emboutissage d'un flan metallique.
ITTO20100687A1 (it) * 2010-08-09 2012-02-10 E M A R C S P A Dispositivo e procedimento per la piegatura con stiramento di pezzi metallici
WO2012037915A1 (fr) * 2010-08-09 2012-03-29 Giw Gesellschaft Für Innovative Werkzeugsysteme Mbh Procédé et dispositif d'emboutissage de tôles
WO2012045292A1 (fr) * 2010-10-04 2012-04-12 Giw Gesellschaft Für Innovative Werkzeugsysteme Mbh Procédé et dispositif d'emboutissage de tôles

Also Published As

Publication number Publication date
ES2287377T3 (es) 2007-12-16
DE50307636D1 (de) 2007-08-23
EP1362650B1 (fr) 2007-07-11
DE10222314A1 (de) 2003-11-27
EP1362650A3 (fr) 2005-10-05

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