EP0865844A3 - Drawing apparatus for a press - Google Patents

Drawing apparatus for a press Download PDF

Info

Publication number
EP0865844A3
EP0865844A3 EP98104672A EP98104672A EP0865844A3 EP 0865844 A3 EP0865844 A3 EP 0865844A3 EP 98104672 A EP98104672 A EP 98104672A EP 98104672 A EP98104672 A EP 98104672A EP 0865844 A3 EP0865844 A3 EP 0865844A3
Authority
EP
European Patent Office
Prior art keywords
pressure
piston
press
sheet
piston chamber
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.)
Withdrawn
Application number
EP98104672A
Other languages
German (de)
French (fr)
Other versions
EP0865844A2 (en
Inventor
Siegfried Baur
Michael Jung
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.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7823749&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0865844(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of EP0865844A2 publication Critical patent/EP0865844A2/en
Publication of EP0865844A3 publication Critical patent/EP0865844A3/en
Withdrawn legal-status Critical Current

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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)

Abstract

Eine Ziehvorrichtung für eine Presse ist mit einem Ziehstößel (7), mit einem Blechhalter (6) mit einem darin gehaltenen Blech (8), und mit einer unter dem Blechhalter angeordneten Druckwange (1), die mit einer parallel zur Ziehrichtung verschiebbaren Kolbenstange (2) verbunden ist, versehen. Die Kolbenstange ist mit einem Vorbeschleunigungskolben (4) eines Vorbeschleunigungszylinders (3) wirkverbunden. Ziehzylinder (9) greifen über Ziehstangen (17) an der Druckwange an, wobei die Ziehzylinder Ziehkolben (19) mit ersten (18) und zweiten Kolbenräumen (10) aufweisen. Der erste zur Ziehstange gerichtete Kolbenraum ist während des Ziehvorganges zur Blechumformung druckgeregelt. Bei Pressenstillstand während einer Blechumformung ist eine Steuerventileinrichtung (28) aktivierbar, durch die zur Aufrechterhaltung des bei Beginn des Pressenstillstandes herrschenden Druckes in dem ersten Kolbenraum (18) während der Zeit des Pressenstillstandes durch einen Druckmittelerzeuger (30) Druckmittel in den ersten Kolbenraum einbringbar ist.

Figure 00000001
A pulling device for a press is provided with a ram (7), with a sheet holder (6) with a sheet (8) held therein, and with a pressure cheek (1) arranged under the sheet holder, which has a piston rod (2 ) is connected. The piston rod is operatively connected to a pre-acceleration piston (4) of a pre-acceleration cylinder (3). Drawing cylinders (9) engage the pressure cheek via drawing rods (17), the drawing cylinders having drawing pistons (19) with first (18) and second piston chambers (10). The first piston chamber facing the pull rod is pressure-controlled during the drawing process for sheet metal forming. When the press stops during sheet metal forming, a control valve device (28) can be activated, by means of which pressure medium can be introduced into the first piston chamber by a pressure medium generator (30) in order to maintain the pressure in the first piston chamber (18) when the press stops when the press stops.
Figure 00000001
EP98104672A 1997-03-18 1998-03-16 Drawing apparatus for a press Withdrawn EP0865844A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19711207A DE19711207A1 (en) 1997-03-18 1997-03-18 Pulling device for a press
DE19711207 1997-03-18

Publications (2)

Publication Number Publication Date
EP0865844A2 EP0865844A2 (en) 1998-09-23
EP0865844A3 true EP0865844A3 (en) 2002-01-16

Family

ID=7823749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104672A Withdrawn EP0865844A3 (en) 1997-03-18 1998-03-16 Drawing apparatus for a press

Country Status (3)

Country Link
US (1) US5979210A (en)
EP (1) EP0865844A3 (en)
DE (1) DE19711207A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6205828B1 (en) * 1998-08-24 2001-03-27 Honda Giken Kogyo Kabushiki Kaisha Forging die, and method and apparatus for controlling the same
AT410469B (en) * 2001-06-27 2003-05-26 Hoerbiger Hydraulik HYDRAULIC WORKING MACHINE
US8429946B2 (en) * 2006-10-17 2013-04-30 Honda Motor Co., Ltd. Press-working method, and press-working apparatus
US11412744B2 (en) 2020-04-27 2022-08-16 Provisur Technologies, Inc. Press for form pressing meat products, and method of use

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896594A (en) * 1986-11-28 1990-01-30 L. Schuler Gmbh Drawing installation for a press

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS190125B1 (en) * 1977-04-05 1979-05-31 Jindrich Spacek Hydraulic press periphery for hydromechanic drawing
JPH0790400B2 (en) * 1989-10-18 1995-10-04 アイダエンジニアリング株式会社 Press die cushion equipment
US5188068A (en) * 1991-02-04 1993-02-23 Crane Cams Roller tappet
JP3060908B2 (en) * 1994-12-21 2000-07-10 トヨタ自動車株式会社 Press machine equalizer
US5638748A (en) * 1996-01-25 1997-06-17 The Minster Machine Company Hydraulic overload proportional valving system for a mechanical press

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896594A (en) * 1986-11-28 1990-01-30 L. Schuler Gmbh Drawing installation for a press

Also Published As

Publication number Publication date
US5979210A (en) 1999-11-09
DE19711207A1 (en) 1998-09-24
EP0865844A2 (en) 1998-09-23

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