EP0312809A3 - Double action press for drawing sheet components - Google Patents

Double action press for drawing sheet components Download PDF

Info

Publication number
EP0312809A3
EP0312809A3 EP88115856A EP88115856A EP0312809A3 EP 0312809 A3 EP0312809 A3 EP 0312809A3 EP 88115856 A EP88115856 A EP 88115856A EP 88115856 A EP88115856 A EP 88115856A EP 0312809 A3 EP0312809 A3 EP 0312809A3
Authority
EP
European Patent Office
Prior art keywords
sheet metal
force
sheet
holder
holder force
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.)
Ceased
Application number
EP88115856A
Other languages
German (de)
French (fr)
Other versions
EP0312809A2 (en
Inventor
Oswald Ostrowski
Volker Dr. Thoms
Bernd Dr. Fugger
Werner Hezel
Thomas Hunyar
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.)
Daimler Benz AG
Original Assignee
Daimler Benz 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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0312809A2 publication Critical patent/EP0312809A2/en
Publication of EP0312809A3 publication Critical patent/EP0312809A3/en
Ceased 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
    • 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
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles

Abstract

Die Erfindung betrifft eine doppeltwirkende Presse (2) zum Ziehen von Blechteilen (1), mit einem hubantreibbaren Blechhalterstößel (4) und mit einem gesonderten, eben­ falls hubantreibbaren Ziehstößel (3). Um die Blechhalter­ kraft reproduziergenau und trägheitsarm bereichsweise individuell einstellen und auf dem voreingestellten Wert halten zu können, wird für jedes Pleuel (6, 6') des Blechhalters gesondert jeweils eine servohydraulische Blechhalterkraftregelung vorgesehen. Jedem Blechhalter­ pleuel ist eine Kolben/Zylinder-Einheit (11) zugeordnet, die die Blechhalterkraft bestimmt. Über einen daran angeschlossenen Druckgeber oder über einen blechhalter­ integrierten Kraftgeber (36) kann die auf den zugehörigen Bereich des Blechhalters entfallende Kraft gemessen werden. Ober eine aus Regler und elektrohydraulisch vorsteuerbaren Proportionalventil gebildete Regel­ strecke kann jeweils der kraftbestimmende Druckraum der Kolben/Zylinder-Einheit individuell auf den er­ forderlichen Druck eingeregelt werden. Diese Regel­ strecke arbeitet trägheitsarm und weitgehend hy­ steresefrei, so daß auch während eines Preßzyklus' der Sollwert für die Blechhalterkraft nach einem sich wiederholenden Funktionsablauf geändert werden kann. Beispielsweise kann die geregelte Blechhalterkraft wahrend des Ziehvorganges individuell erhöht oder auch abgesenkt werden. The invention relates to a double-acting press (2) for Pulling sheet metal parts (1), with a stroke driven Sheet metal plunger (4) and with a separate, flat if stroke-driven ram (3). To the sheet holder force reproducible and low inertia in some areas set individually and on the preset To be able to hold value is for each connecting rod (6, 6 ') of the Sheet metal holder separately a servo-hydraulic Sheet metal holder force control provided. Any sheet holder a piston / cylinder unit (11) is assigned to the connecting rod, which determines the sheet holder force. About one of them connected pressure transmitter or via a sheet holder integrated force transducer (36) can on the associated Area of the sheet holder force measured will. One with controller and electrohydraulic pre-controllable proportional valve formed rule The force-determining pressure chamber can stretch in each case the piston / cylinder unit individually to the he required pressure can be adjusted. That rule route works with low inertia and largely hy free of steresis, so that even during a press cycle the target value for the sheet metal holder force after a repetitive functional sequence can be changed can. For example, the controlled sheet metal holder force during the drawing process individually increased or also be lowered.

EP88115856A 1987-10-21 1988-09-27 Double action press for drawing sheet components Ceased EP0312809A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3735582 1987-10-21
DE19873735582 DE3735582C1 (en) 1987-10-21 1987-10-21 Double-acting press for pulling sheet metal parts

Publications (2)

Publication Number Publication Date
EP0312809A2 EP0312809A2 (en) 1989-04-26
EP0312809A3 true EP0312809A3 (en) 1989-10-18

Family

ID=6338758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115856A Ceased EP0312809A3 (en) 1987-10-21 1988-09-27 Double action press for drawing sheet components

Country Status (4)

Country Link
EP (1) EP0312809A3 (en)
JP (1) JPH01130824A (en)
DD (1) DD283085A5 (en)
DE (1) DE3735582C1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744177A1 (en) * 1987-12-24 1989-07-06 Audi Ag Method for deep-drawing blanks, in particular deep-drawn sheets for motor-vehicle body elements
JP2501276Y2 (en) 1989-03-17 1996-06-12 株式会社名機製作所 Hydraulic press equipment
DE3922212A1 (en) * 1989-07-06 1991-01-17 Schuler Gmbh L CONTROL CIRCUIT FOR THE RUNNING UP OF THE PRESSURE STRING OF A DRAWER
DE3933806A1 (en) * 1989-10-10 1991-11-14 Schuler Gmbh L DRAWER IN DRAWING STAGES OF PRESSES
DD289724A5 (en) * 1989-12-05 1991-05-08 Fz Fuer Umform- Und Plastverarbeitungstechnik,De METHOD FOR INCREASING THE BORDER DEPENDING RULE
IT1239856B (en) * 1990-01-24 1993-11-15 Fiat Auto Spa PROCEDURE FOR THE MOLDING OF SHEETS AND HYDRAULIC PRESS FOR THE REALIZATION OF THIS PROCEDURE.
ES2052298T3 (en) * 1990-04-23 1994-07-01 Mueller Weingarten Maschf DEVICE FOR STUFFING A PRESS FOR STUFFING PIECES OF SHEET FORM.
DE4121869C2 (en) * 1991-07-03 2001-04-12 Erfurt Umformtechnik Gmbh Device for changing the sheet metal holding forces on table cushions in presses during the drawing process
EP0531140B1 (en) * 1991-09-04 1995-07-26 Toyota Jidosha Kabushiki Kaisha Hydraulic cushioning system for press, having hydraulic power supply including means for adjusting initial pressure to pressure-pin cylinders
DE4229155C2 (en) * 1992-09-01 1994-06-23 Daimler Benz Ag Process for automatic, iterative process optimization of drawing processes in presses
US5457980A (en) * 1992-11-05 1995-10-17 Toyota Jidosha Kabushiki Kaisha Method and device for controlling, checking or optimizing pressure of cushion pin cylinders of press by discharging fluid or initial pressure
DE69313585T2 (en) * 1992-11-05 1998-02-19 Toyota Motor Co Ltd Die cushion and method for optimizing its cylinder pin pressure
JP2776196B2 (en) * 1993-04-28 1998-07-16 トヨタ自動車株式会社 Diagnosis method and device for pressure equalizing cushion device
DE4405909A1 (en) * 1994-02-24 1995-08-31 Erfurt Umformtechnik Gmbh Method and circuit arrangement for interrupting and continuing the drawing process on double-acting presses, in particular hydraulic presses
JP2727954B2 (en) * 1994-03-03 1998-03-18 トヨタ自動車株式会社 Press equipment
JP2812201B2 (en) * 1994-07-15 1998-10-22 トヨタ自動車株式会社 Press equipment
JP3060908B2 (en) * 1994-12-21 2000-07-10 トヨタ自動車株式会社 Press machine equalizer
NL1021738C2 (en) * 2002-10-24 2004-04-27 Tno Method and device for reducing crease formation during deep drawing.
ITPN20050061A1 (en) * 2005-09-06 2007-03-07 Silvano Bordignon "OLE-PNEUMATIC MIXED SPRING WITH EXPANSION VESSEL"
CN103697014B (en) * 2013-12-17 2016-03-23 马钢(集团)控股有限公司 Wheel oil hydraulic press stripping tank

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406526A1 (en) * 1984-02-23 1985-09-12 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Sliding table with built-in blank-holder frame
EP0173755A1 (en) * 1984-06-29 1986-03-12 L. SCHULER GmbH Drawing device in a press
US4635466A (en) * 1984-04-27 1987-01-13 Kabushiki Kaisha Komatsu Seisakusho Die cushion apparatus for use in a press machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE735158C (en) * 1939-04-30 1943-05-07 Messerschmitt Boelkow Blohm Device for controlling the pressure of a pneumatic or hydropneumatic fold holder of a sheet metal drawing press
US3108470A (en) * 1960-03-28 1963-10-29 Danly Mach Specialties Inc High speed tonnage indicator for power press
JPS532423B2 (en) * 1973-09-27 1978-01-27
DE2407864C3 (en) * 1974-02-19 1982-08-26 Maschinenfabrik Weingarten Ag, 7987 Weingarten Pressure pin arrangement on a pressure pad for presses
DE2833829C2 (en) * 1978-08-02 1986-11-27 L. Schuler GmbH, 7320 Göppingen Circuit arrangement for an actuator of a slide adjustment
JPS5949120B2 (en) * 1978-12-14 1984-11-30 株式会社サム電子機械 hydraulic compression device
CS217858B1 (en) * 1981-02-09 1983-01-28 Jaroslav Pecha Method of the metal sheet shaping and device for executing the said method
JPS59193800A (en) * 1983-04-18 1984-11-02 Toyota Motor Corp Control mechanism for press load
JPS59212200A (en) * 1983-05-18 1984-12-01 Toyota Motor Corp Control device for dynamic characteristic of press load
JPS609526A (en) * 1983-06-28 1985-01-18 Toyota Motor Corp Method and device for controlling pressing force of blank holder
DE3475889D1 (en) * 1984-02-03 1989-02-09 Schuler Gmbh L Pressure control apparatus in presses
JPS623720A (en) * 1985-06-28 1987-01-09 中部電力株式会社 Apparatus for cutting tree

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406526A1 (en) * 1984-02-23 1985-09-12 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Sliding table with built-in blank-holder frame
US4635466A (en) * 1984-04-27 1987-01-13 Kabushiki Kaisha Komatsu Seisakusho Die cushion apparatus for use in a press machine
EP0173755A1 (en) * 1984-06-29 1986-03-12 L. SCHULER GmbH Drawing device in a press

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Also Published As

Publication number Publication date
EP0312809A2 (en) 1989-04-26
DE3735582C1 (en) 1988-04-28
JPH01130824A (en) 1989-05-23
DD283085A5 (en) 1990-10-03

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