EP0268893B1 - Dispositif d'étirage pour presse - Google Patents
Dispositif d'étirage pour presse Download PDFInfo
- Publication number
- EP0268893B1 EP0268893B1 EP87116279A EP87116279A EP0268893B1 EP 0268893 B1 EP0268893 B1 EP 0268893B1 EP 87116279 A EP87116279 A EP 87116279A EP 87116279 A EP87116279 A EP 87116279A EP 0268893 B1 EP0268893 B1 EP 0268893B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- piston
- control
- cylinder
- effective surface
- 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.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 14
- 230000001133 acceleration Effects 0.000 description 16
- 239000002184 metal Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 drawing device for a press of a generic type, which is known for example from EP-A-0 074 421.
- 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 ram In addition to the holding force to be exerted by the drawing device, the ram must also 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 start 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-A-0 074 421, serves to hold the sheet holder against the pull.
- 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-A1-35 05 984.
- the run-up control takes place via the pressure line 7 and the control block 8, the overrun of hydraulic fluid during the shaping via the check valve-equipped line 36.
- a line for the return from the control block 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, that is to say 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 depending on 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 sucked in from the reservoir 4 into the pressure chamber 12 via the follow-up control 30.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Presses And Accessory Devices Thereof (AREA)
Claims (3)
- Dispositif d'emboutissage pour une presse, comportant un coulisseau d'emboutissage entraîné mécaniquement et un serre-flan dont la force de retenue agissant sur le flan dans le sens opposé au sens d'emboutissage (43) est exercée au moyen d'une tige de piston (3) actionnée par une pression de fluide dans un vérin fixe (2), où la tige de piston (3) est raccordée à un piston de poussée (15) pourvu d'une surface active (13) susceptible de recevoir une pression dans le sens d'emboutissage (43) et où il est prévu une commande qui opère en fonction de la course du coulisseau et qui peut accélérer préalablement le serre-flan dans le sens d'emboutissage (43) par la pression d'un fluide hydraulique sur ladite surface active (13) avant l'application du coulisseau sur le serre-flan, caractérisé en ce que la chambre de pression (12) associée à ladite surface active (13) du piston de poussée (15) est raccordée hydrauliquement d'une part à la chambre de réserve (18) d'un vérin d'accélération préalable (16) comprenant une chambre de réserve (18), une chambre de pression (19) et un piston (17) séparant ces chambres (18, 19) l'une de l'autre, la chambre de pression (19) du vérin d'accélération préalable pouvant être mise sous pression au moyen d'un distributeur à étranglement (21) par la commande opérant en fonction de la course du coulisseau, et d'autre part peut être raccordée hydrauliquement à un réservoir (4) de fluide hydraulique à la fin de l'accélération préalable du piston de poussée (15), au moyen d'une commande de retour (30, 31) actionnée par la commande opérant en fonction de la course du coulisseau.
- Dispositif selon la revendication 1, caractérisé en ce que le piston (17) du vérin d'accélération préalable (16) est raccordé par sa tige de piston (28) au piston d'un vérin de rappel (27).
- Dispositif selon la revendication 1, caractérisé en ce que la commande de retour (30, 31) comporte un distributeur (30) pourvu d'un clapet (33) qui s'ouvre en cas d'aspiration en direction de la chambre de pression (12) associée à ladite surface active (13) et qui se ferme en cas de compression dans ladite chambre de pression (12), ce clapet étant ouvert par pression au moyen d'une soupape de présélection (31) pour permettre un écoulement du fluide entre ladite chambre de pression (12) et le réservoir (4) pour le déplacement de la tige de piston (3) dans le sens opposé au sens d'emboutissage (43).
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 EP0268893A2 (fr) | 1988-06-01 |
EP0268893A3 EP0268893A3 (en) | 1989-12-27 |
EP0268893B1 true 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) |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922212A1 (de) * | 1989-07-06 | 1991-01-17 | Schuler Gmbh L | Regelschaltung fuer den hochlauf der druckwange eines ziehapparats |
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 |
DE3933806A1 (de) * | 1989-10-10 | 1991-11-14 | Schuler Gmbh L | Ziehapparat in ziehstufen von pressen |
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 |
DE4129367A1 (de) * | 1991-09-04 | 1993-03-11 | Schuler Gmbh L | Schaltungsanordnung zum regeln der geschwindigkeit eines druckzylinders |
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 |
US7775215B2 (en) | 2005-02-24 | 2010-08-17 | Ethicon Endo-Surgery, Inc. | System and method for determining implanted device positioning and obtaining pressure data |
US8016744B2 (en) | 2005-02-24 | 2011-09-13 | Ethicon Endo-Surgery, Inc. | External pressure-based gastric band adjustment system and method |
US8066629B2 (en) | 2005-02-24 | 2011-11-29 | Ethicon Endo-Surgery, Inc. | Apparatus for adjustment and sensing of gastric band pressure |
US7927270B2 (en) * | 2005-02-24 | 2011-04-19 | Ethicon Endo-Surgery, Inc. | External mechanical pressure sensor for gastric band pressure measurements |
US7658196B2 (en) | 2005-02-24 | 2010-02-09 | Ethicon Endo-Surgery, Inc. | System and method for determining implanted device orientation |
US8152710B2 (en) * | 2006-04-06 | 2012-04-10 | Ethicon Endo-Surgery, Inc. | Physiological parameter analysis for an implantable restriction device and a data logger |
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 |
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 |
US20090171379A1 (en) * | 2007-12-27 | 2009-07-02 | Ethicon Endo-Surgery, Inc. | Fluid logic for regulating restriction devices |
US8142452B2 (en) * | 2007-12-27 | 2012-03-27 | Ethicon Endo-Surgery, Inc. | Controlling pressure in adjustable 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 |
US8337389B2 (en) | 2008-01-28 | 2012-12-25 | Ethicon Endo-Surgery, Inc. | Methods and devices for diagnosing performance of a gastric restriction system |
US8591395B2 (en) | 2008-01-28 | 2013-11-26 | Ethicon Endo-Surgery, Inc. | Gastric restriction device data handling devices and methods |
US20090192534A1 (en) * | 2008-01-29 | 2009-07-30 | Ethicon Endo-Surgery, Inc. | Sensor trigger |
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 |
US8221439B2 (en) * | 2008-02-07 | 2012-07-17 | Ethicon Endo-Surgery, Inc. | Powering implantable restriction systems using kinetic motion |
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 |
US20090228063A1 (en) * | 2008-03-06 | 2009-09-10 | Ethicon Endo-Surgery, Inc. | System and method of communicating with an implantable antenna |
US8187162B2 (en) * | 2008-03-06 | 2012-05-29 | Ethicon Endo-Surgery, Inc. | Reorientation port |
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 |
Family Cites Families (10)
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 |
JPS56500008A (fr) * | 1978-12-21 | 1981-01-08 | ||
EP0074421B1 (fr) * | 1981-09-12 | 1985-05-22 | L. SCHULER GmbH | Agencement d'emboutissage pour presses à poinçon d'emboutissage actionné mécaniquement |
DD227349A1 (de) * | 1984-10-08 | 1985-09-18 | Warnke Umformtech Veb K | Regelanordnung fuer steuerbare pneumatikkissen |
DE3505984A1 (de) * | 1985-02-21 | 1986-08-21 | L. Schuler GmbH, 7320 Göppingen | Ziehapparat an pressen |
-
1986
- 1986-11-28 DE DE19863640788 patent/DE3640788A1/de not_active Withdrawn
-
1987
- 1987-11-05 EP EP87116279A patent/EP0268893B1/fr not_active Expired - Lifetime
- 1987-11-05 DE DE8787116279T patent/DE3781244D1/de not_active Expired - Lifetime
- 1987-11-05 ES ES198787116279T patent/ES2033768T3/es not_active Expired - Lifetime
- 1987-11-26 CA CA000552809A patent/CA1280039C/fr not_active Expired - Lifetime
- 1987-11-27 US US07/125,925 patent/US4896594A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2033768T3 (es) | 1993-04-01 |
DE3640788A1 (de) | 1988-06-01 |
EP0268893A2 (fr) | 1988-06-01 |
US4896594A (en) | 1990-01-30 |
CA1280039C (fr) | 1991-02-12 |
EP0268893A3 (en) | 1989-12-27 |
DE3781244D1 (de) | 1992-09-24 |
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