EP0835699A2 - Hydraulische Tiefzieheinrichtung - Google Patents
Hydraulische Tiefzieheinrichtung Download PDFInfo
- Publication number
- EP0835699A2 EP0835699A2 EP97117310A EP97117310A EP0835699A2 EP 0835699 A2 EP0835699 A2 EP 0835699A2 EP 97117310 A EP97117310 A EP 97117310A EP 97117310 A EP97117310 A EP 97117310A EP 0835699 A2 EP0835699 A2 EP 0835699A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- hydraulic
- cylinders
- ring
- deep
- 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
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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
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- 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
- B21D24/04—Blank holders; Mounting means therefor
- B21D24/08—Pneumatically or hydraulically loaded blank holders
Definitions
- the invention relates to a hydraulic deep-drawing device in presses for drawing sheet metal parts after Preamble of claim 1.
- a hydraulic deep-drawing device according to the generic term of claim 1 is known from DE-OS 44 35 069.
- This invention was based on the task of the press together with the hydroelastic puller shape that existing without expensive customization Tools of the previous conventional deep drawing forming technology can be used with the aim that such older tools with the claim of a modern CNC-controlled, divided into fields of force Multi-point unit can be driven.
- a major advantage of the invention according to DE 44 35 069 is that that tools from conventional single-acting presses without cumbersome and expensive customization for one process-guided deep drawing with CNC-controlled Multi-point force control can be used.
- Unsolved is the problem of the different flow behavior of the Workpiece sheets, for example in the manufacture of Double sink with different sink geometries e.g. B. the pool distance, the depth, the radii and the Sheet thickness and different material qualities of the Workpiece, that is, it must be in the well-known manner the critical flow front areas shredded paper under the Sheet metal plate or the drawing ring are placed. Especially this requires a lot of effort when running in new tools time expenditure and is only partially reproducible.
- the invention has for its object a hydraulic To create deep-drawing device with which a reproducible Thermoforming with a wide variety of knitting parameters such as Material properties, greasing, lubrication, temperature etc. in terms of shape and quality of the workpiece is possible without a constant manual correction to Example by placing pieces of paper under it, necessary is.
- the solution according to the invention is particularly a reproducible drawing of the workpiece sheet without Paper shredded pad enables.
- a simple and reproducible pulling is achieved in that the outer Knitting ring over the tool base plate on the Sheet metal holding plate with an adjustable base load component Sheet metal holding force is applied, that is, the pressure bolts do not act on the sheet metal holding plate, but on flat surfaces Surfaces of the tool base plate.
- Target points or target areas individually or in groups can be controlled. This can be done by high concentration of forces in the critical areas, for example in the area of a bridge Double sink, the inflow of the board material braked and by appropriate adjustment of the force profiles in the hydraulic sheet metal holding cylinders along the Drawing ring contour can be controlled.
- the multi-point system is thus the separation of the sheet metal holding function in two different functional levels.
- a hydraulic circuit acts as a basic load (outer effective ring) on the Tool base plate that is below the actual one Sheet metal holding plate is arranged, this base load itself in an adjustable, even sheet metal holding force complete sheet metal impact.
- different cylinders are grouped together (inner knitting ring) close to the drawing ring radius the sheet holder. These cylinders precisely control the flow of the Material in the critical areas near the forming zone.
- the sheet metal holding cylinders are advantageously included a large effective area equipped with pressure bolts different shaping optimal effective points to reach.
- the multipoint unit is convenient designed for making parts of a Workpiece family, it can be used in whole or in part for the Be adaptable to other families of workpiece parts, using the existing electrical and hydraulic Control and regulating devices of the press.
- the order A separate multi-point unit ensures reproducible Transfer of the desired sheet metal holding force by the Ram reached a distance of ⁇ s from the workpiece.
- This Locking the plunger thus also secures when it is introduced large eccentric load reproducible operating conditions without tipping.
- the ram is eccentric Load moment only slightly affected. In particular, the Sheet metal holding force distribution not during the drawing process changed by tilting the ram
- the drawing shows in Figure 1 the invention Deep-drawing device in a press 1 in the closed Working position before the deep-drawing process, without board 19.
- the press 1 assumes the function of a guard locking or Tool clamping device. That is, the locking cylinder 2 have the function of the dead weight of ram 3 and Intermediate plate 4 and 8 drawing ring vertically in the course of a Hydraulic opening or closing movement.
- In closed position are the spacers 21, the forming forces occurring during the deep drawing forming process and Sheet holder forces (process forces), recorded statically.
- the spacers 21 is a hydraulically controlled mechanical locking unit can be used so that the forces occurring between the lower table construction of the press frame 7 and the ram 3 are collected.
- the drawing tool and the multi-point unit 12 are shown larger in detail.
- the lower half of the tool consists of the elements die 9, sheet metal holding plate 10, the tool base plate 11, the pressure pin 5 and form pin 20.
- the multi-point unit 12 contains the sheet metal holding cylinder 13 (designed as a short-stroke cylinder) with the short-stroke piston 14.
- the drawing ring 8 With the intermediate plate 4, the drawing ring 8 as in a conventional version, firmly connected and raised and lowered with the ram 3.
- the short-stroke pistons 14 of the exchangeable multi-point unit 12 are constructed in such a way that they can be used for a product family of similar parts but with different dimensions. Most important for the implementation is the relationship between the product shape (e.g.
- the short-stroke cylinder principle with an installed stroke of just a few millimeters has the advantage of more flexibility with regard to the positioning of the actuators relative to the workpiece geometry. This is achieved in combination with an improved dynamic behavior of the hydraulic system, and realizes the possibility of programming complex sheet metal holding force profiles that exactly meet the requirements that are necessary for each stage of the drawing process.
- the holding force of the sheet metal holding cylinder 13 is divided into an outer knitting ring 25 and an inner knitting ring 26, the outer knitting ring 25 acting on the tool base plate 11 with an adjustable, constant basic load with the basic load pressure bolts 6, while the points of action of the inner knitting ring 26 via the pressure bolts 5 and shaped bolts 20 act on the sheet metal holding plate 10 through correspondingly shaped openings in the tool base plate 11 and can be acted upon individually or in groups in a controlled manner.
- knitting rings 25 and 26, delimited from each other by the dividing line 30 (thick lines) are clearly shown. In a narrow grid, the sheet metal holding cylinders 13 with the short-stroke pistons 14 envelop the drawing ring contour 18 in accordance with the workpiece to be drawn.
- the table top 15 (see also FIGS. 8a and 8b) has cutouts with guides 24 for the housings 23 of the forming cylinders / pistons 16/17, primarily in the middle of the clamping surface.
- a corresponding number of hydraulic shaping pistons 17 can be provided.
- the functional sequence of a deep-drawing process is as follows: When the press 1 is open, the flat board 19 is on the Sheet metal holding plate 10 and the lowered punch 9 placed. The plunger 3 is then turned on in a rapid closing movement Guide rails 22 hydraulically or mechanically except for one small gap, ⁇ s, from about 0.5 mm to 5 mm just above the Workpiece 19 lowered. The plunger 3 is either supported by spacers 21, the set Ram force is above the total process force got to. Alternatively, the ram can be fixed using a mechanical / hydraulic locking unit.
- the pressures in the sheet metal holding cylinders 13th or groups of cylinders according to the different Material flow in the area of tension and compression (for example in the pressure forming area material thickening by concentric confluence of the material and Material thickening in the frame flange) by a Computer control changed.
- the Short-stroke piston 14 equipped with such a large effective area, that the pressure pin 5 or the form pin 20 in the Tool base plate 11 also eccentrically according to the Drawing ring geometry 18 or drawing die contour on the Active surfaces of the short-stroke piston 14 in the sheet metal holding cylinder 13 can be arranged.
- the Tool base plate 11 according to the shape of the pressure bolts 5 and molded bolts 20 are made.
- the shaped bolts 20 the workpiece shape or the drawing ring contour 18 be adjusted accordingly.
- Figures 5a, 5b and 5c as well 7a and 7b show the possibility as through different application of the pressure pin 5 and form pin 20 on the active surfaces of the sheet metal holding cylinder 13 Adaptation to similar workpieces from a family of parts is guaranteed, the multi-point unit 12 of several Interchangeable module strips 27 can be assembled can and therefore for the production of different Workpieces with different dimensions are usable.
- the Figures 5a, 5b and 5c each show in elevation and side elevation the construction of a tool base plate 11 by changing strips 27 or by interchangeable modules 28 and 28 ', the corresponding of a workpiece of a subfamily on the carrier plate 29 are fixable.
- FIG. 6a shows the pressure profiles during the drawing path
- Figure 6b shows how by entering Tool parameters in a calculator and programmable Representation on the workpiece families can be displayed and are developable.
- the monitor shows the starting values in KN when pulling a double sink with different sized basins.
- Ram down rapid traverse Multipoint start value reached Pull path reached Ram at a distance
- Ram pressure reached Forming elements A / B active Ram rapid traverse upwards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Lubricants (AREA)
- Press Drives And Press Lines (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Formation And Processing Of Food Products (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
- Figur 1
- die Presse mit der erfindungsgemäßen Tiefzieheinrichtung im Aufriß,
- Figur 2
- die Vielpunkteinheit mit Ziehwerkzeug aus Figur 1 in größerem Maßstab,
- Figur 3a
- die Vielpunkt-Kontrolleinheit nach Figur 1 und Schnitt A-A aus Figur 3b,
- Figur 3b
- die Anordnung der Blechhaltezylinder für den äußeren und inneren Wirkkranz im Grundriß für ein Teil mit rechteckiger Kontur,
- Figur 4a
- die Ausbildung eines runden Druckbolzens in mittiger Anordnung auf der Wirkfläche der Blechhaltezylinder im Grundriß,
- Figur 4b
- die Ausbildung eines rechteckigen Druckbolzens in mittiger Anordnung auf der Wirkfläche der Blechhaltezylinder im Grundriß,
- Figur 4c
- die Ausbildung eines runden Druckbolzens in außermittiger Anordnung auf der Wirkfläche der Blechhaltezylinder im Grundriß,
- Figur 4d
- die Ausbildung eines rechteckigen Druckbolzens in außermittiger Anordnung auf der Wirkfläche der Blechhaltezylinder im Grundriß,
- Figur 5a
- die Ausbildung einer Vielpunkteinheit mit nebeneinander angeordneten, auswechselbaren Modulstreifen,
- Figur 5b
- eine weitere Ausbildung einer Vielpunkteinheit mit beliebig angeordnet Modulstreifen auf einer gemeinsamen Trägerplatte,
- Figur 5c
- eine andere Ausbildung einer Vielpunkteinheit mit unterschiedlichen Modulausführungen, beliebig angeordnet auf einer gemeinsamen Trägerplatte,
- Figur 6
- a Druckprofile während des Ziehweges,
- Figur 6b
- die Bildschirmdarstellung der Parameter,
- Figur 7a
- die Werkzeuggrundplatte mit eingesteckten Druckbolzen und der Kurzhubkolbenposition für den inneren Wirkkranz für eine Doppelbeckenspüle,
- Figur 7b
- die Werkzeuggrundplatte mit eingesteckten Druckbolzen und der Kurzhubkolbenposition für den inneren Wirkkranz für eine Einbeckenspüle,
- Figur 8a
- in perspektivischer Darstellung die Anordnung der Umformzylinder in der Tischplatte,
- Figur 8b
- den verschiebbaren Umformzylinder mit Ziehkolben in der Führung der Tischplatte im Grundriß und
- Figur 8c
- nach Figur 8b die Anordnung zweier Umformzylinder mit Ziehkolben in der Tischplatte.
Die Kurzhubkolben 14 der austauschbaren Vielpunkteinheit 12 sind so aufgebaut, daß sie für eine Produktfamilie ähnlicher Teile aber mit unterschiedlichen Dimensionen verwendbar sind. Am wichtigsten für die Durchführung ist die Beziehung zwischen Produktform (zum Beispiel rechteckige Form des Ziehringes 8) und den Zylinderpositionen, um den Materialfluß in den Bereichen der Druck- und Zugbereiche in der effizientesten Art und Weise kontrollieren zu können. Verglichen mit den Konzepten von konventionellen einfach- und doppeltwirkenden Pressen hat das Kurzhubzylinderprinzip mit einem installierten Hub von nur wenigen Millimetern den Vorteil von mehr Flexibilität in Hinsicht auf Plazierung der Aktoren relativ zu der Werkstückgeometrie. Das wird erreicht in Kombination mit einem verbesserten dynamischen Verhalten des hydraulischen Systems, und verwirklicht die Möglichkeit der Programmierung von komplexen Blechhaltekraftprofilen, welche exakt die Anforderung erfüllen, die für jedes Stadium des Ziehprozesses notwendig sind.
Diese Anordnung bewegbarer Zylindereinheiten als Ziehantriebe, plaziert im unteren Querhaupt der Presse, übernimmt die Ziehfunktion für Teile mit unterschiedlichen Geometrien. Durch das Trennen der Ziehfunktion von der Vielpunkteinheit 12 kann die Presse 1 leicht an verschiedene Produktgruppen angepaßt werden, indem die Vielpunkteinheit 12 ausgewechselt und die Positionen der Umformzylinder/-kolben 16/17 angepaßt werden.
Stössel Eilgang abwärts | Multipunktstartwert erreicht | Ziehweg erreicht |
Stössel auf Distanz | Umformelement c aktiv | Entlastung |
Stösseldruck erreicht | Umformelemente A/B aktiv | Stössel Eilgang aufwärts |
- 1.
- Presse
- 2.
- Schließzylinder
- 3.
- Stössel
- 4.
- Zwischenplatte
- 5.
- Druckbolzen für inneren Wirkkranz
- 6.
- Druckbolzen für Grundlast
- 7.
- Pressenrahmen
- 8.
- Ziehring = Matrize
- 9.
- Ziehstempel = Patrize
- 10.
- Blechhalteplatte
- 11.
- Werkzeuggrundplatte
- 12.
- Vielpunkteinheit
- 13.
- Blechhaltezylinder
- 14.
- Kurzhubkolben
- 15.
- Tischplatte
- 16.
- Umformzylinder
- 17.
- Umformkolben
- 18.
- Ziehringkontur
- 19.
- Platine / Werkstück
- 20.
- Formbolzen
- 21.
- Distanzstücke
- 22.
- Führungsschiene für Stössel
- 23.
- Gehäuse für 16
- 24.
- Führung
- 25.
- äußerer Wirkkranz
- 26.
- innerer Wirkkranz
- 27.
- Wechselmodulstreifen
- 28.
- Wechselmodul
- 29.
- Trägerplatte für 27
- 30.
- Trennlinie
Claims (7)
- Hydraulische Tiefzieheinrichtung bei Pressen zum Ziehen von Blechformteilen mit einer gegenüber hydraulischen Druckzylindern abgestützten Blechhalteplatte sowie von hydraulischen Druckzylindern in Ziehrichtung bewegbar geführtem Ziehstempel, eine unterhalb der Blechhalteplatte angeordnete Werkzeuggrundplatte und eine Vielpunkteinheit mit einer Vielzahl von Kurzhubzylindern in Vielpunkt-Ansteuerung entsprechend der Ziehringkontur, wobei sich der Stössel bis kurz vor dem Kontakt mit dem Werkstück abwärts bewegt und mit einem Spaltabstand ▵s zum Werkstück mit dem Pressengestell kraft- oder formschlüssig festsetzbar ist sowie die hydraulisch aktivierten Kurzhubzylinder den Spaltabstand ▵s überbrücken und mittels der Blechhalteplatte das Werkstück gegen den Ziehring drücken, dadurch gekennzeichnet, daß die Haltekraft zum Tiefziehen des Werkstückes (19) aufgeteilt ist auf einen äußeren Wirkkranz (25) und einen inneren Wirkkranz (26), wobei der äußere Wirkkranz (25) mit einer einstellbaren Grundlast aus den Blechhaltezylindern (13) hydraulisch beaufschlagt wird und auf die Werkzeuggrundplatte (11) wirkt, während die Wirkpunkte mit den Druck-/Formbolzen (5; 20) des inneren Wirkkranzes (26) auf die Blechhalteplatte (10) wirken und jeweils einzeln oder in Gruppen gezielt geregelt beaufschlagbar sind.
- Hydraulische Tiefzieheinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kurzhubkolben (14) mit einer so großen Wirkfläche ausgestattet sind, daß die Druck-/Formbolzen (5 oder 20) aus der Werkzeuggrundplatte (11) zentrisch oder exzentrisch auf diesen Wirkflächen angeordnet werden können.
- Hydraulische Tiefzieheinrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß durch unterschiedliche Anordnung der Druck-/Formbolzen (5, 20) auf den Kolbenwirkflächen eine Anpassung an ähnliche Werkstücke einer Teilefamilie möglich ist.
- Hydraulische Tiefzieheinrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Vielpunkteinheit (12) aus zwei oder mehreren Wechselmodulen (27, 28 oder 28') besteht und durch verschiedene Zusammensetzung für die Herstellung unterschiedlicher Werkstücke geeignet ist.
- Hydraulische Tiefzieheinrichtung nach den Ansprüchen 1 bis 4, gekennzeichnet durch eine Eingabe der Werkzeugparameter (Kraftprofile, Blechhalter) in einen Rechner die bildliche Darstellung der Blechhalte- und Umformoperation und eine Speicherung von werkzeugspezifischen Datensätzen.
- Hydraulische Tiefzieheinrichtung nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß ein oder mehrere Umformzylinder (16) mit ihrem Gehäuse (23) als Einheit in Führungen (24) der Tischplatte (15) verschiebbar und auswechselbar angeordnet sind.
- Hydraulische Tiefzieheinrichtung nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß die Druck-/Formbolzen (5; 20) für den inneren Wirkkranz (26) entsprechend der zugehörigen Ziehringkontur (18) ausgebildet bzw. geformt sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19641411A DE19641411A1 (de) | 1996-10-08 | 1996-10-08 | Hydraulische Tiefzieheinrichtung |
DE19641411 | 1996-10-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0835699A2 true EP0835699A2 (de) | 1998-04-15 |
EP0835699A3 EP0835699A3 (de) | 1998-05-13 |
EP0835699B1 EP0835699B1 (de) | 2002-02-20 |
Family
ID=7808139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97117310A Expired - Lifetime EP0835699B1 (de) | 1996-10-08 | 1997-10-07 | Hydraulische Tiefzieheinrichtung |
Country Status (8)
Country | Link |
---|---|
US (1) | US5979211A (de) |
EP (1) | EP0835699B1 (de) |
CN (1) | CN1079305C (de) |
AT (1) | ATE213437T1 (de) |
BR (1) | BR9704948A (de) |
DE (2) | DE19641411A1 (de) |
DK (1) | DK0835699T3 (de) |
TW (1) | TW352347B (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1317973A2 (de) * | 2001-12-10 | 2003-06-11 | Schuler SMG GmbH & Co. KG | Tiefziehpresse |
US6691545B1 (en) | 1999-06-21 | 2004-02-17 | Hydraulico A/S | Tool and a method for pressure shaping |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6418824B1 (en) | 2000-03-03 | 2002-07-16 | Pcps Limited Partnership | Two stage punch press actuator with output drive shaft position sensing |
KR100421799B1 (ko) * | 2000-09-25 | 2004-03-10 | 주식회사 위너 | 더블액션 유압프레스 |
DE10210573A1 (de) * | 2002-03-11 | 2003-10-02 | Dieffenbacher Gmbh Maschf | Hydroelastische Tiefzieheinrichtung |
JP3983194B2 (ja) * | 2003-04-01 | 2007-09-26 | トヨタ自動車株式会社 | プレス成形用金型 |
DE10331939B4 (de) * | 2003-07-15 | 2014-09-18 | Bayerische Motoren Werke Aktiengesellschaft | Blechumformwerkzeug |
DE10350089B4 (de) * | 2003-10-27 | 2007-04-05 | Alcan Deutschland Gmbh | Tiefziehvorrichtung zum Tiefziehen eines Werkstückes |
US7237423B1 (en) | 2004-11-12 | 2007-07-03 | Miller Tool And Die Company Inc. | Apparatus for stretch forming blanks |
US20080060407A1 (en) * | 2006-09-08 | 2008-03-13 | Samuel Stamping Technologies | High definition door skin and method of manufacturing the same |
CN100478093C (zh) * | 2007-06-14 | 2009-04-15 | 吉林大学 | 型材拉伸夹具装置 |
CN101428318B (zh) * | 2008-09-09 | 2011-02-16 | 中国航空工业第一集团公司北京航空制造工程研究所 | 多点成形模具的复合冲头 |
US8756970B2 (en) * | 2011-03-14 | 2014-06-24 | Ford Global Technologies, Llc | Method of drawing a blank by preforming a channel in a preform that is subsequently drawn into a die cavity |
DE102012018606A1 (de) * | 2012-09-20 | 2014-03-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Tiefziehwerkzeug und Verfahren zum Tiefziehen eines Werkstückes |
KR101509708B1 (ko) * | 2013-09-05 | 2015-04-07 | 현대자동차 주식회사 | 프레스용 쿠션 핀 장치 |
KR101871087B1 (ko) | 2014-03-04 | 2018-06-25 | 신닛테츠스미킨 카부시키카이샤 | 프레스 성형품의 제조 방법, 프레스 성형품의 제조 장치, 맨드럴 및 프레스 성형품 |
DE102016009416B4 (de) | 2016-06-22 | 2018-09-20 | Horst Baltschun | Energieeffiziente Presse mit stabiler Stößelführung |
US10933458B2 (en) * | 2018-12-19 | 2021-03-02 | Fca Us Llc | Stretch forming die |
KR20210155437A (ko) * | 2020-06-15 | 2021-12-23 | 삼성디스플레이 주식회사 | 윈도우 성형 장치 및 이를 이용한 윈도우 성형 방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US4745792A (en) * | 1986-10-14 | 1988-05-24 | Aluminum Company Of America | Blankholder for a draw press |
DE3724382A1 (de) * | 1987-07-23 | 1989-02-02 | Uniplanung Tiefziehtechnik Gmb | Werkzeug zum ziehen von blechformteilen |
EP0453955A1 (de) * | 1990-04-23 | 1991-10-30 | Maschinenfabrik Müller-Weingarten AG | Zieheinrichtung in einer Presse zum Ziehen von Blechformteilen |
DE4435069A1 (de) * | 1994-09-30 | 1996-04-04 | Dieffenbacher Gmbh Maschf | Hydraulische Tiefzieheinrichtung |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US1970134A (en) * | 1932-07-29 | 1934-08-14 | Oilgear Co | Hydraulic press |
US3420089A (en) * | 1966-02-16 | 1969-01-07 | Mc Donnell Douglas Corp | Variable pressure drawpress and method |
BE1004564A3 (fr) * | 1990-08-30 | 1992-12-15 | Cockerill Rech & Dev | Dispositif de regulation de la force de serre-flan dans une presse. |
EP0531141B1 (de) * | 1991-09-04 | 1995-03-22 | Toyota Jidosha Kabushiki Kaisha | Hydraulische Polsteranordnung für eine Presse, mit einem Absperrventil zum Abschalten der Energieversorgung der Druckbolzen beim Kontakt des beweglichen Werkzeugs mit dem Werkstück |
JP2689855B2 (ja) * | 1993-05-25 | 1997-12-10 | トヨタ自動車株式会社 | ダイクッション装置のエア圧設定方法および装置 |
JP2812201B2 (ja) * | 1994-07-15 | 1998-10-22 | トヨタ自動車株式会社 | プレス装置 |
CN1077465C (zh) * | 1994-09-30 | 2002-01-09 | J·迪芬巴赫机器制造有限公司 | 用于拉伸薄板成形件的压机的液压深拉伸装置 |
JPH0929349A (ja) * | 1995-07-18 | 1997-02-04 | Toyota Motor Corp | 可変ビードを利用した絞り成形方法および装置 |
-
1996
- 1996-10-08 DE DE19641411A patent/DE19641411A1/de not_active Withdrawn
-
1997
- 1997-10-01 BR BR9704948-4A patent/BR9704948A/pt not_active IP Right Cessation
- 1997-10-04 TW TW086114499A patent/TW352347B/zh active
- 1997-10-07 AT AT97117310T patent/ATE213437T1/de not_active IP Right Cessation
- 1997-10-07 DK DK97117310T patent/DK0835699T3/da active
- 1997-10-07 EP EP97117310A patent/EP0835699B1/de not_active Expired - Lifetime
- 1997-10-07 CN CN97120575A patent/CN1079305C/zh not_active Expired - Fee Related
- 1997-10-07 DE DE59706423T patent/DE59706423D1/de not_active Expired - Lifetime
- 1997-10-08 US US08/946,836 patent/US5979211A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4745792A (en) * | 1986-10-14 | 1988-05-24 | Aluminum Company Of America | Blankholder for a draw press |
DE3724382A1 (de) * | 1987-07-23 | 1989-02-02 | Uniplanung Tiefziehtechnik Gmb | Werkzeug zum ziehen von blechformteilen |
EP0453955A1 (de) * | 1990-04-23 | 1991-10-30 | Maschinenfabrik Müller-Weingarten AG | Zieheinrichtung in einer Presse zum Ziehen von Blechformteilen |
DE4435069A1 (de) * | 1994-09-30 | 1996-04-04 | Dieffenbacher Gmbh Maschf | Hydraulische Tiefzieheinrichtung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6691545B1 (en) | 1999-06-21 | 2004-02-17 | Hydraulico A/S | Tool and a method for pressure shaping |
EP1317973A2 (de) * | 2001-12-10 | 2003-06-11 | Schuler SMG GmbH & Co. KG | Tiefziehpresse |
EP1317973A3 (de) * | 2001-12-10 | 2004-10-06 | Schuler SMG GmbH & Co. KG | Tiefziehpresse |
Also Published As
Publication number | Publication date |
---|---|
EP0835699B1 (de) | 2002-02-20 |
DE19641411A1 (de) | 1998-04-09 |
EP0835699A3 (de) | 1998-05-13 |
BR9704948A (pt) | 2000-06-06 |
US5979211A (en) | 1999-11-09 |
CN1079305C (zh) | 2002-02-20 |
DE59706423D1 (de) | 2002-03-28 |
CN1178729A (zh) | 1998-04-15 |
DK0835699T3 (da) | 2002-06-03 |
TW352347B (en) | 1999-02-11 |
ATE213437T1 (de) | 2002-03-15 |
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