EP0835699B1 - Hydraulische Tiefzieheinrichtung - Google Patents
Hydraulische Tiefzieheinrichtung Download PDFInfo
- Publication number
- EP0835699B1 EP0835699B1 EP97117310A EP97117310A EP0835699B1 EP 0835699 B1 EP0835699 B1 EP 0835699B1 EP 97117310 A EP97117310 A EP 97117310A EP 97117310 A EP97117310 A EP 97117310A EP 0835699 B1 EP0835699 B1 EP 0835699B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- short stroke
- hydraulic
- ring
- cylinders
- deep drawing
- 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
- 239000002184 metal Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000000418 atomic force spectrum Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 7
- 238000007493 shaping process Methods 0.000 claims 6
- 230000000007 visual effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 10
- 238000009940 knitting Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 238000012369 In process control Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012546 transfer Methods 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
- 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 z. 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 short stroke 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 short-stroke cylinders combined in groups act (inner knitting ring) close to the drawing ring radius the sheet metal holding plate. These short stroke cylinders precisely control the flow of the Material in the critical areas near the forming zone.
- the short-stroke pistons of the short-stroke cylinders are advantageously included a large effective area equipped with pressure bolts Optimal effective points, fixed on the active surface of the short-stroke pistons 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 one in FIG Deep-drawing device in a press 1 in the closed Working position before the deep-drawing process, without workpiece 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 in FIG shown larger in detail.
- the lower half of the tool consists of the elements punch 9, Sheet metal holding plate 10, the tool base plate 11, the Push pin 5 and form pin 20.
- the multi-point unit 12 includes the short stroke cylinders 13 with the short-stroke pistons 14. With the The intermediate plate 4 is the drawing ring 8 as in one conventional version firmly connected and with the ram 3 can be raised and lowered.
- the short-stroke pistons 14 of the exchangeable multi-point unit 12 are designed to be more similar for a product family Parts but with different dimensions can be used.
- the relationship is most important for implementation between product shape (for example, rectangular shape of the Drawing ring 8) and the cylinder positions to the material flow in the areas of pressure and tension areas in the most efficient way to control.
- product shape for example, rectangular shape of the Drawing ring 8
- the short-stroke cylinder principle also has double-acting presses an installed stroke of just a few millimeters Advantage of more flexibility with regard to placement of the Actuators relative to the workpiece geometry. That is achieved in combination with an improved dynamic behavior of the hydraulic system, and realizes the possibility the programming of complex sheet metal holding force profiles, which exactly meet the requirement for each stage of the drawing process are necessary.
- the holding force of the short-stroke cylinder 13 is in an outer Knitted ring 25 and an inner ring 26, where the outer knitting ring 25 with an adjustable, constant base load with the pressure bolts 6 the tool base plate 11 acts while the action points of the inner knitting ring 26 via the pressure pin 5 and form pin 20 through appropriately shaped openings in the Tool base plate 11 act on the sheet metal holding plate 10 and specifically regulated individually or in groups are acted upon.
- Figures 3a and 3b are knitted rings 25 and 26, delimited from one another by the dividing line 30 (thickly dashed), clearly shown. In the narrow Grid enclose the short-stroke cylinders 13 with the Short stroke piston 14, the drawing ring contour 18 according to the pulling workpiece.
- the table top 15 see also FIG.
- the functional sequence of a deep-drawing process is as follows: When the press 1 is open, the flat workpiece 19 is placed 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 3 got to. Alternatively, the ram can be fixed using a mechanical / hydraulic locking unit. In Figure 1, the gap distance s is drawn, the same the sheet thickness of the workpiece 19 plus the gap ⁇ s.
- the pressure bolts 5 and form bolts 20 corresponding to the respective tensile and compression areas are along the drawing ring contour 18 of the Sink geometry arranged.
- 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 short-stroke 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 short-stroke 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 19 with different dimensions is useful.
- the Figures 5a, 5b and 5c each show in elevation and side elevation the construction of a tool base plate 11 by interchangeable module strips 27 or by interchangeable modules 28 and 28 ', the corresponding of a workpiece 19 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Press Drives And Press Lines (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Lubricants (AREA)
- Formation And Processing Of Food Products (AREA)
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 Kurzhubzylinder 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 Kurzhubkolben im Grundriß,
- Figur 4b
- die Ausbildung eines rechteckigen Druckbolzens in mittiger Anordnung auf der Wirkfläche der Kurzhubkolben im Grundriß,
- Figur 4c
- die Ausbildung eines runden Druckbolzens in außermittiger Anordnung auf der Wirkfläche der Kurzhubkolben im Grundriß,
- Figur 4d
- die Ausbildung eines rechteckigen Druckbolzens in außermittiger Anordnung auf der Wirkfläche der Kurzhubkolben im Grundriß,
- Figur 5a
- die Ausbildung einer Vielpunkteinheit mit nebeneinander angeordneten, auswechselbaren Modulstreifen,
- Figur 5b
- eine weitere Ausbildung einer Vielpunkteinheit mit beliebig angeordneten Modulstreifen auf einer gemeinsamen Trägerplatte,
- Figur 5c
- eine andere Ausbildung einer Vielpunkteinheit mit unterschiedlichen Modulstreifenausführungen, beliebig angeordnet auf einer gemeinsamen Trägerplatte,
- Figur 6a
- 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 Umformkolben in der Führung der Tischplatte im Grundriß und
- Figur 8c
- nach Figur 8b die Anordnung zweier Umformzylinder mit Umformkolben in der Tischplatte.
| Stössel Eilgang abwärts | Multipunktstartwert erreicht | Ziehweg erreicht |
| Stössel auf Distanz | Umformelement c aktiv | Entlastung |
| Stösseldruck erreicht | Umformelemente A/B aktiv | Stössel Eilgang aufwärts |
Claims (7)
- Hydraulische Tiefzieheinrichtung bei Pressen zum Ziehen von Blechformteilen mit einer gegenüber die Haltekraft zum Tiefziehen des Werkstücks (19) einstellenden hydraulischen Kurzhubzylindern (13) abgestützten Blechhalteplatte (10) sowie einem von hydraulischen Umformzylindern (16) in Ziehrichtung bewegbar geführten Ziehstempeln (9), einem oberhalb der Blechhalteplatte (19) angeordneten Ziehring (8), einer unterhalb der Blechhalteplatte (10) angeordneten Werkzeuggrundplatte (11) und Vielpunkteinheit (12) mit einer Vielzahl von Kurzhubzylindern (13) in Vielpunkt-Ansteuerung entsprechend der Ziehringkontur (18) und einem in einem Pressenrahmen (7) geführten Stößel (3), wobei sich der Stößel (3) bis kurz vor dem Kontakt mit dem Werkstück (19) abwärts bewegt und mit einem Spaltabstand Δs zum Werkstück (19) mit dem Pressenrahmen (7) kraft- oder formschlüssig festsetzbar ist, wonach die hydraulisch aktivierten Kurzhubzylinder (13) den Spaltabstand Δs überbrücken und mittels der Blechhalteplatte (10) das Werkstück (19) gegen den Ziehring (8) drücken,
dadurch gekennzeichnet, daß die Kurzhubzylinder (13) der Vielpunkteinheit in einem äußeren Wirkkranz (25) und einem inneren Wirkkranz (26) aufgeteilt sind, wobei die Kurzhubzylinder (13) des äußeren Wirkkranzes (25) mit einer einstellbaren Grundlast über Kurzhubkolben (14) mittels Druckbolzen (6) die Werkzeuggrundplatte (11) hydraulisch beaufschlagen, während die Kurzhubzylinder (13) des inneren Wirkkranzes (26) die Blechhalteplatte (10) direkt über Kurzhubkolben (14) mittels Druck-/Formbolzen (5/20) in Wirkpunkten und jeweils einzeln oder in Gruppen gezielt geregelt beaufschlagen. - Hydraulische Tiefzieheinrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Druck-/Formbolzen (5 oder 20) des inneren Wirkkranzes (26) auf der entsprechend groß ausgebildeten Wirkfläche der Kurzhubkolben (14) zentrisch oder exzentrisch fixierbar sind. - Hydraulische Tiefzieheinrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß durch unterschiedliche Anordnung der Druck-/Formbolzen (5 oder 20) auf den Wirkflächen der Kurzhubkolben (14) des inneren Wirkkranzes (26) eine Anpassung an ähnliche Werkstücke (19) einer Teilefamilie möglich ist. - Hydraulische Tiefzieheinrichtung nach den Anspruch 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 (19) geeignet ist. - Hydraulische Tiefzieheinrichtung nach den Anspruch 1 bis 4,
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 Anspruch 1 bis 5,
dadurch gekennzeichnet, daß die Druck-/Formbolzen (5; 20) für den inneren Wirkkranz (26) entsprechend der zugehörigen Ziehringkontur (18) ausgebildet bzw. geformt sind. - Hydraulische Tiefzieheinrichtung nach Anspruch 1,
gekennzeichnet durch eine Pressensteuerung mit Eingabe der beim Ziehvorgang auftretenden Werkzeugparameter in einen Rechner zur Einstellung programmierbarer Kraftprofile in den hydraulischen Kurzhubzylindern (13) entlang der Ziehringkontur (18) des inneren Wirkkranzes (26) und zur bildlichen Darstellung der Werkzeugparameter bei der Blechhalte- und Umformoperation an einem Monitor sowie einer Speicherung von werkzeugspezifischen Datensätzen in diesem Rechner.
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 EP0835699A2 (de) | 1998-04-15 |
| EP0835699A3 EP0835699A3 (de) | 1998-05-13 |
| EP0835699B1 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK173519B1 (da) | 1999-06-21 | 2001-01-29 | Hydraulico As | Værktøj til presseformgivning af metalplade og fremgangsmåde til regulering af et fladetryk ved brug af sådant værktøj |
| 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 |
| DE10160410A1 (de) * | 2001-12-10 | 2003-06-18 | Schuler Smg Gmbh & Co Kg | Tiefziehpresse |
| 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 |
| USD557427S1 (en) | 2006-09-08 | 2007-12-11 | Samuel Stamping Technologies | High definition two panel door skin |
| 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 |
| 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 |
| CN110405021B (zh) | 2014-03-04 | 2020-12-01 | 日本制铁株式会社 | 心轴 |
| 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 |
| KR102819808B1 (ko) * | 2020-06-15 | 2025-06-16 | 삼성디스플레이 주식회사 | 윈도우 성형 장치 및 이를 이용한 윈도우 성형 방법 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| EP0453955B1 (de) * | 1990-04-23 | 1994-03-23 | Maschinenfabrik Müller-Weingarten AG | Zieheinrichtung in einer Presse zum Ziehen von Blechformteilen |
| 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 |
| DE4435069A1 (de) * | 1994-09-30 | 1996-04-04 | Dieffenbacher Gmbh Maschf | Hydraulische Tiefzieheinrichtung |
| 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 DK DK97117310T patent/DK0835699T3/da active
- 1997-10-07 DE DE59706423T patent/DE59706423D1/de not_active Expired - Lifetime
- 1997-10-07 EP EP97117310A patent/EP0835699B1/de not_active Expired - Lifetime
- 1997-10-07 AT AT97117310T patent/ATE213437T1/de not_active IP Right Cessation
- 1997-10-07 CN CN97120575A patent/CN1079305C/zh not_active Expired - Fee Related
- 1997-10-08 US US08/946,836 patent/US5979211A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| US5979211A (en) | 1999-11-09 |
| DE19641411A1 (de) | 1998-04-09 |
| DK0835699T3 (da) | 2002-06-03 |
| ATE213437T1 (de) | 2002-03-15 |
| BR9704948A (pt) | 2000-06-06 |
| EP0835699A3 (de) | 1998-05-13 |
| CN1178729A (zh) | 1998-04-15 |
| EP0835699A2 (de) | 1998-04-15 |
| DE59706423D1 (de) | 2002-03-28 |
| CN1079305C (zh) | 2002-02-20 |
| TW352347B (en) | 1999-02-11 |
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