EP0268893A2 - Dispositif d'étirage pour presse - Google Patents

Dispositif d'étirage pour presse Download PDF

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Publication number
EP0268893A2
EP0268893A2 EP87116279A EP87116279A EP0268893A2 EP 0268893 A2 EP0268893 A2 EP 0268893A2 EP 87116279 A EP87116279 A EP 87116279A EP 87116279 A EP87116279 A EP 87116279A EP 0268893 A2 EP0268893 A2 EP 0268893A2
Authority
EP
European Patent Office
Prior art keywords
pressure
acceleration
piston
sheet
piston rod
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
EP87116279A
Other languages
German (de)
English (en)
Other versions
EP0268893B1 (fr
EP0268893A3 (en
Inventor
Siegfried Baur
Rudi Brandstetter
Gerhard Roos
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
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of EP0268893A2 publication Critical patent/EP0268893A2/fr
Publication of EP0268893A3 publication Critical patent/EP0268893A3/de
Application granted granted Critical
Publication of EP0268893B1 publication Critical patent/EP0268893B1/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
    • 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

Definitions

  • the invention relates to a pulling device for a press of a generic type.
  • the sheet inserted into the tool is first pressed against the sheet holder by the drawing ring and then moved together with the sheet holder against the holding force exerted by the drawing device.
  • the sheet held between the sheet holder and the drawing ring is deformed on the press table by the drawing die of the active tool half.
  • the plunger also has to overcome the inertia force which comes into effect as a result of the acceleration of the movable sheet metal holder and drawing device masses at the beginning of the deformation.
  • This unit must apply the pressure required for the pre-acceleration against the action of the pulling device.
  • the hydraulic fluid for the main pressures of pulling, if necessary locking the pulling device and the pre-acceleration and the hydraulic fluid for the control are removed from one and the same tub.
  • the movement of the piston rod of the pulling device in the pre-acceleration phase is time-controlled.
  • the pre-acceleration must end at the time when the maximum ram movement (bottom dead center) of the ram is reached.
  • the sheet is held evenly at the start of the drawing phase.
  • the pressure cylinder 2 in Fig. 1 is attached via its cylinder flange 1 in the frame of the press, possibly in the press table.
  • the piston rod 3, which can be moved in and against the direction of pull 43, is rigidly connected to the actual pulling device which, as shown in EP 0 074 421 A1, serves to counteract the pulling of the sheet metal holder.
  • the pressure cylinder 2 is surrounded in its upper part by a reservoir 4 for hydraulic fluid, which is fluidly connected to a tank 5.
  • the level in reservoir 4 and tank 5, which drops due to, for example, leakage losses, is supplemented by a motor-pump unit 35.
  • the pressure chamber 6, in conjunction with the pressure piston 10, is used for the controlled run-up of the piston rod 3 for ejecting the workpiece from the tool, as e.g. has been described in detail in DE 35 05 984 A1.
  • the run-up control takes place via the pressure line 7 and the control block 8, the after-run of hydraulic fluid during the forming process via the check valve-equipped line 36.
  • a line for the return from the run-up control 8 into the reservoir 4 is positioned at 9.
  • the line 11 is used for ventilation.
  • the piston rod 3 extends in the downwardly extended part into a pressure chamber 12 and here has a pressure piston 15.
  • the attached collar 14 is displaceable on the piston rod 3 with the pressure piston 15 and serves to limit the run-up of the piston rod 3.
  • the pressure piston 15 forms an active surface 13 which delimits the pressure chamber 12 and can be acted upon in the pulling direction 43.
  • the pressure chamber 12 filled with hydraulic fluid stands with a pressure volume space 18 of a pre-acceleration cylinder 16 in fluid communication.
  • this cylinder 16 comprises a further pressure chamber 19 which is separated from the pressure volume chamber 18 by the piston 17.
  • the amount of hydraulic fluid in the pressure volume space 18 can be adjusted to a certain amount via, for example, automatically adjustable stops.
  • the pressure chamber 19 facing away from the pressure volume space 18 can be brought into flow connection with a pressure accumulator 22 via a pressure line 20 and a throttling directional valve 21, for example a so-called prop valve.
  • the pressure in the pressure accumulator 22 is applied via a motor-pump unit 24.
  • the throttling directional control valve 21 is controlled by the press control via the control line 44 as a function of the movement of the drawing ram. Filters, oilers, water separators, pressure transducers, means for reducing and indicating the pressure and the like are not shown in the circuit diagram, since these means and their use are generally known.
  • the pressure in the pressure chamber 19 can be reduced via the return line 37 and the return control 23 into the trough 38, specifically when the piston rod 3 is raised (ejecting the workpiece).
  • the pressure piston 17 is connected via its piston rod 28 to the piston of the return pressure cylinder 27 rigidly connected.
  • the pressure piston 17 is to be withdrawn completely, for example up to stops for regulating the pressure quantity.
  • the return pressure cylinder 27 is controlled via the return control 29, which is connected to the general control pressure line 26.
  • the pressure in the control line 26 is applied via the motor-pump unit 25.
  • the pressure chamber 12 for the pre-acceleration is also connected to the reservoir 4 via a follow-up control with a valve 30 and a follow-up line 34.
  • the valve seat 33 opens in the suction phase of the pressure chamber 12 when the piston 17 in the pre-acceleration cylinder 16 is moved into its left position, which takes up the pressure volume chamber 18, i.e. after the pre-acceleration phase 41 of the piston rod 3.
  • the valve seat is in the run-up phase of the piston rod 3 33 to open, wherein the pressure piston 17 has assumed its shown right position and the pressure volume space 18 is completely filled with hydraulic fluid.
  • the valve seat 33 is controlled in the open position by means of a control piston 32 to which control pressure from the general control pressure line 26 can be applied.
  • a 2/2-way valve 31 is introduced into the control pressure line 26 for this purpose, via a control line 45 coming from the press control as a function of the position or movement phase of the ram must be opened.
  • FIG. 2 shows in a diagram the curve 39 for a possible movement of the drawing ram and the curve 40 for the movement of the sheet metal holder.
  • the sheet metal holder is pre-accelerated during the working stroke of the drawing ram.
  • the drawing ram strikes the lowering sheet metal with the upper part of the tool attached to it.
  • hydraulic fluid is drawn in from the reservoir 4 into the pressure chamber 12 via the follow-up control 30.
EP87116279A 1986-11-28 1987-11-05 Dispositif d'étirage pour presse Expired - Lifetime EP0268893B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3640788 1986-11-28
DE19863640788 DE3640788A1 (de) 1986-11-28 1986-11-28 Zieheinrichtung fuer eine presse

Publications (3)

Publication Number Publication Date
EP0268893A2 true EP0268893A2 (fr) 1988-06-01
EP0268893A3 EP0268893A3 (en) 1989-12-27
EP0268893B1 EP0268893B1 (fr) 1992-08-19

Family

ID=6315065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116279A Expired - Lifetime EP0268893B1 (fr) 1986-11-28 1987-11-05 Dispositif d'étirage pour presse

Country Status (5)

Country Link
US (1) US4896594A (fr)
EP (1) EP0268893B1 (fr)
CA (1) CA1280039C (fr)
DE (2) DE3640788A1 (fr)
ES (1) ES2033768T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406792A1 (fr) * 1989-07-06 1991-01-09 L. SCHULER GmbH Couplage de réglage pour la course supérieure pour la jumelle de pression d'un dispositif d'emboutissage
EP0422491A1 (fr) * 1989-10-10 1991-04-17 L. SCHULER GmbH Dispositif pour emboutissage en passes d'emboutissage de presses
EP0530739A1 (fr) * 1991-09-04 1993-03-10 SCHULER PRESSEN GmbH & Co. Dispositif de connexions pour le réglage de la vitesse d'un cylindre à pression

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0417753B1 (fr) * 1989-09-12 1993-09-22 Maschinenfabrik Müller-Weingarten AG Presse mécanique ou hydraulique avec dispositif d'étirage ou d'emboutissage pour presse à plusieurs étapes
DE4031645A1 (de) * 1990-10-05 1992-04-09 Dieffenbacher Gmbh Maschf Steuerung fuer eine hydroelastische tiefzieheinrichtung
WO1993001012A1 (fr) * 1991-07-01 1993-01-21 Kabushiki Kaisha Komatsu Seisakusho Systeme d'amortissement de matrice dans une presse
US5533336A (en) * 1994-03-17 1996-07-09 Advanced Systems Automation Pte Ltd Hydroelectric cylinder for improved power amplification and control
JPH08309599A (ja) * 1995-05-23 1996-11-26 Kyoichi Sato 油圧プレス装置のラム駆動制御装置及び同駆動制御方法
DE19538316A1 (de) * 1995-10-14 1997-04-17 Schuler Pressen Gmbh & Co Ziehvorrichtung für eine Presse
DE19711207A1 (de) * 1997-03-18 1998-09-24 Schuler Pressen Gmbh & Co Ziehvorrichtung für eine Presse
JP4516785B2 (ja) * 2004-06-18 2010-08-04 株式会社小松製作所 ダイクッション装置
US7775966B2 (en) 2005-02-24 2010-08-17 Ethicon Endo-Surgery, Inc. Non-invasive pressure measurement in a fluid adjustable restrictive device
US7699770B2 (en) 2005-02-24 2010-04-20 Ethicon Endo-Surgery, Inc. Device for non-invasive measurement of fluid pressure in an adjustable restriction device
US7927270B2 (en) * 2005-02-24 2011-04-19 Ethicon Endo-Surgery, Inc. External mechanical pressure sensor for gastric band pressure measurements
US8066629B2 (en) 2005-02-24 2011-11-29 Ethicon Endo-Surgery, Inc. Apparatus for adjustment and sensing of gastric band pressure
US8016744B2 (en) 2005-02-24 2011-09-13 Ethicon Endo-Surgery, Inc. External pressure-based gastric band adjustment system and method
US7658196B2 (en) 2005-02-24 2010-02-09 Ethicon Endo-Surgery, Inc. System and method for determining implanted device orientation
US7775215B2 (en) 2005-02-24 2010-08-17 Ethicon Endo-Surgery, Inc. System and method for determining implanted device positioning and obtaining pressure data
US20080249806A1 (en) * 2006-04-06 2008-10-09 Ethicon Endo-Surgery, Inc Data Analysis for an Implantable Restriction Device and a Data Logger
US8870742B2 (en) 2006-04-06 2014-10-28 Ethicon Endo-Surgery, Inc. GUI for an implantable restriction device and a data logger
US20080250341A1 (en) * 2006-04-06 2008-10-09 Ethicon Endo-Surgery, Inc. Gui With Trend Analysis for an Implantable Restriction Device and a Data Logger
US8152710B2 (en) * 2006-04-06 2012-04-10 Ethicon Endo-Surgery, Inc. Physiological parameter analysis for an implantable restriction device and a data logger
US8187163B2 (en) * 2007-12-10 2012-05-29 Ethicon Endo-Surgery, Inc. Methods for implanting a gastric restriction device
US8100870B2 (en) 2007-12-14 2012-01-24 Ethicon Endo-Surgery, Inc. Adjustable height gastric restriction devices and methods
US8142452B2 (en) * 2007-12-27 2012-03-27 Ethicon Endo-Surgery, Inc. Controlling pressure in adjustable restriction devices
US20090171379A1 (en) * 2007-12-27 2009-07-02 Ethicon Endo-Surgery, Inc. Fluid logic for regulating restriction devices
US8377079B2 (en) 2007-12-27 2013-02-19 Ethicon Endo-Surgery, Inc. Constant force mechanisms for regulating restriction devices
US8192350B2 (en) 2008-01-28 2012-06-05 Ethicon Endo-Surgery, Inc. Methods and devices for measuring impedance in a gastric restriction system
US8591395B2 (en) 2008-01-28 2013-11-26 Ethicon Endo-Surgery, Inc. Gastric restriction device data handling devices and methods
US8337389B2 (en) 2008-01-28 2012-12-25 Ethicon Endo-Surgery, Inc. Methods and devices for diagnosing performance of a gastric restriction system
US20090192534A1 (en) * 2008-01-29 2009-07-30 Ethicon Endo-Surgery, Inc. Sensor trigger
US8221439B2 (en) * 2008-02-07 2012-07-17 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using kinetic motion
US7844342B2 (en) 2008-02-07 2010-11-30 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using light
US20090204179A1 (en) * 2008-02-07 2009-08-13 Ethicon Endo-Surgery, Inc. Powering implantable restriction systems using temperature
US8114345B2 (en) * 2008-02-08 2012-02-14 Ethicon Endo-Surgery, Inc. System and method of sterilizing an implantable medical device
US8057492B2 (en) * 2008-02-12 2011-11-15 Ethicon Endo-Surgery, Inc. Automatically adjusting band system with MEMS pump
US8591532B2 (en) 2008-02-12 2013-11-26 Ethicon Endo-Sugery, Inc. Automatically adjusting band system
US8034065B2 (en) * 2008-02-26 2011-10-11 Ethicon Endo-Surgery, Inc. Controlling pressure in adjustable restriction devices
US8187162B2 (en) * 2008-03-06 2012-05-29 Ethicon Endo-Surgery, Inc. Reorientation port
US20090228063A1 (en) * 2008-03-06 2009-09-10 Ethicon Endo-Surgery, Inc. System and method of communicating with an implantable antenna
US8233995B2 (en) 2008-03-06 2012-07-31 Ethicon Endo-Surgery, Inc. System and method of aligning an implantable antenna
CN105834272B (zh) * 2016-04-14 2018-07-17 中国十七冶集团有限公司 一种受限空间下的大型铝板拉伸机设备安装方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0074421A1 (fr) * 1981-09-12 1983-03-23 L. SCHULER GmbH Agencement d'emboutissage pour presses à poinçon d'emboutissage actionné mécaniquement
DE3521698A1 (de) * 1984-10-08 1986-04-10 VEB Kombinat Umformtechnik "Herbert Warnke" Erfurt, DDR 5010 Erfurt Regelanordnung fuer steuerbare pneumatikkissen
EP0192115A2 (fr) * 1985-02-21 1986-08-27 L. SCHULER GmbH Appareil d'étirage pour presses

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585297A (en) * 1949-05-23 1952-02-12 Rupert Diecasting Company Aluminum die-casting machine
US2926412A (en) * 1953-12-31 1960-03-01 French Oil Mill Machinery Press
US3085530A (en) * 1958-10-22 1963-04-16 Floyd M Williamson Hydraulic press ram cushion
US3122092A (en) * 1961-07-24 1964-02-25 Anderson Clayton & Co Intensified press
US3636748A (en) * 1969-03-24 1972-01-25 George Roberts Hall Drawing of sheet metal
US3762906A (en) * 1972-08-04 1973-10-02 Corning Glass Works Pressurized fluid ram acceleration system
DE2953430C2 (de) * 1978-12-21 1985-07-04 Evgenij Aleksandrovič Antonov Verfahren zur Herstellung von hohlen Erzeugnissen durch Tiefziehen und Presse zur Durchführung dieses Verfahrens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0074421A1 (fr) * 1981-09-12 1983-03-23 L. SCHULER GmbH Agencement d'emboutissage pour presses à poinçon d'emboutissage actionné mécaniquement
DE3521698A1 (de) * 1984-10-08 1986-04-10 VEB Kombinat Umformtechnik "Herbert Warnke" Erfurt, DDR 5010 Erfurt Regelanordnung fuer steuerbare pneumatikkissen
EP0192115A2 (fr) * 1985-02-21 1986-08-27 L. SCHULER GmbH Appareil d'étirage pour presses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406792A1 (fr) * 1989-07-06 1991-01-09 L. SCHULER GmbH Couplage de réglage pour la course supérieure pour la jumelle de pression d'un dispositif d'emboutissage
EP0422491A1 (fr) * 1989-10-10 1991-04-17 L. SCHULER GmbH Dispositif pour emboutissage en passes d'emboutissage de presses
EP0530739A1 (fr) * 1991-09-04 1993-03-10 SCHULER PRESSEN GmbH & Co. Dispositif de connexions pour le réglage de la vitesse d'un cylindre à pression

Also Published As

Publication number Publication date
US4896594A (en) 1990-01-30
ES2033768T3 (es) 1993-04-01
EP0268893B1 (fr) 1992-08-19
DE3781244D1 (de) 1992-09-24
EP0268893A3 (en) 1989-12-27
CA1280039C (fr) 1991-02-12
DE3640788A1 (de) 1988-06-01

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