EP0704258A1 - Méthode et dispositif pour le formage des tÔles - Google Patents

Méthode et dispositif pour le formage des tÔles Download PDF

Info

Publication number: EP0704258A1
Authority: EP; European Patent Office
Prior art keywords: tool; contour; shape contour; parting plane; sheet metal
Prior art date: 1994-09-29
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

EP95112736A

Other languages

German (de)

English (en)

Other versions

EP0704258B1 (fr

Inventor

Harald Käsmacher

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.)

Schuler Werkzeuge GmbH and Co

SMG Sueddeutsche Maschinenbau GmbH

Original Assignee

SMG Sueddeutsche Maschinenbau 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.)

1994-09-29

Filing date

1995-08-12

Publication date

1996-04-03

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6529503&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0704258(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1995-08-12 Application filed by SMG Sueddeutsche Maschinenbau GmbH filed Critical SMG Sueddeutsche Maschinenbau GmbH

1996-04-03 Publication of EP0704258A1 publication Critical patent/EP0704258A1/fr

1998-06-10 Application granted granted Critical

1998-06-10 Publication of EP0704258B1 publication Critical patent/EP0704258B1/fr

2015-08-12 Anticipated expiration legal-status Critical

Status Revoked legal-status Critical Current

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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
- B21D26/027—Means for controlling fluid parameters, e.g. pressure or temperature
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
- B21D26/031—Mould construction

Definitions

the invention relates to a method for forming sheet metal, in that a blank in the parting plane between an upper tool and a lower tool, one of which has the shape contour, is clamped in a liquid-tight manner and is molded onto the shape contour by the action of a hydraulic pressure medium on its side opposite the shape contour.
the active medium is a hydraulic pressure medium.
the board clamped between the sheet metal holder and the drawing ring is drawn with a form stamp, which has the contour of the finished molded part, into a corresponding counter-tool, also called a water tank, in which the pressure medium is located and from which the pressure medium is located is displaced according to the feed of the drawing die.
This method has the advantage over pure mechanical drawing methods that Sheet metal in the area of the drawing radius of the drawing ring is arched out and consequently is not pulled over the drawing radius, so that the particularly heavy stress on the sheet metal there is avoided.
the outside also remains largely without drawing marks.
This method is not suitable for flat molded parts with only slight contouring, since the finished molded part has only a low dimensional stability.
stretch forming is known, in which the blank is firmly clamped between an upper tool and a lower tool.
One of the tools has the desired shape, while the other tool is connected to a controllable hydraulic source.
By applying pressure to the board on the side opposite the contour it is molded into the other tool.
the entire degree of forming is worked out solely by stretching the sheet. The process is therefore severely restricted both in terms of the degree of deformation and the formable sheet thicknesses.
stretch-slip forming in which one tool has a preform with less contouring, the other tool has the final contour and both tools can be pressurized.
the firmly clamped sheet metal blank is first molded into the preforming tool by means of pressure medium and then brought into the final shape by pressurization from the other side. This procedure is very complex from the point of view of operation, as well as tool and machine technology.
the invention has for its object a method and to propose a device which in particular allows the production of flat molded parts with weak contouring and nevertheless good dimensional stability.
this object is achieved according to the invention in that the plate under controlled action of the pressure medium initially up to an elongation of 10 to 15% in the direction of the The shape of the shape is preformed and then, with continued pressure and retightening the sheet, it is finally shaped without further stretching until it lies completely on the shape of the shape.
the method according to the invention therefore works essentially in two stages, in that, in the preforming phase, an expansion of 10 to 15% is introduced into the sheet by means of controlled pressurization, the board essentially only bulging out like a membrane, that is to say generally having the largest bulge in the central region . Due to the stretch of 10 to 15%, material hardening is achieved. In the subsequent final forming under constant pressure from the pressure medium, the sheet is formed without further stretching until it lies completely on the contour of the mold.
the stretching required in the preforming phase can be achieved in different ways.
the shape contour is set at such a small distance from the parting plane at the beginning of the shaping process that the blank touches the shape contour in regions during the preforming.
the sheet is arched through in the preforming phase until it touches the projecting parts of the shape contour, the distance of the shape contour from the parting plane being adjusted such that the contact takes place at about the time when an elongation of 10 to 15% occurs. is reached, while the sheet metal is only molded onto the remaining contour during further forming.
the greatest mold depth is determined, inter alia, by the smallest distance between the mold contour and the parting plane set for the preforming. This can lead to the fact that the molded part must then be trimmed in the edge region, which is associated with a corresponding waste of material. It is therefore also provided according to the invention that the shape contour is moved in the direction of the parting plane during the final shaping. This allows the depth of the mold to be reduced to almost the desired size, so that the molded part does not have to be trimmed afterwards or only with a small amount of material waste. This procedure also prevents further stretching after the preforming phase has ended.
the desired expansion can be achieved particularly simply if the blank is firmly clamped between the upper and lower tool during the preforming and the clamping is released during the final shaping to such an extent that the sheet metal can retighten.
stretching mainly takes place in the preforming phase, while there is a typical deep drawing during the final shaping.
the invention further relates to a device for forming sheet metal, consisting of an upper tool and a lower tool, one of which is the shape contour, the other is connected to a controllable hydraulic source and in the parting plane a board can be clamped liquid-tight.
the object of the invention is achieved in that the tool having the shape contour is formed in two parts and consists of a drawing ring which interacts with the other tool and a shape stamp which has the shape contour and can be moved relative to the parting plane.
a preferred embodiment of this device is characterized in that the forming die can be set at the beginning of the shaping in a position with respect to the parting plane in which the blank touches the contour of the area in regions during a preforming phase until an elongation of 10 to 15% is reached, and in that can then be moved in the direction of the parting plane during final shaping.
the measure serves the same purpose that the distance between the drawing ring and the opposite tool for controlling the clamping force holding the board on the edge is adjustable.
the blank can be firmly clamped during the preforming phase and released during the final deformation of the clamping force to such an extent that the sheet metal can retighten.
the device shown in the drawing consists of a lower tool 1 and an upper tool 2.
the lower tool has on its upper side a chamber 3 which is connected via a line 4 to a controllable hydraulic source. Furthermore, a circumferential liquid seal 5 is used on the upper side of the lower tool 1.
the upper tool consists of two parts, namely a drawing ring 6 and a die 7 having the shape contour, it being evident from the drawing that it is a flat or slightly curved shape contour for a large-area molded part.
This can be the bonnet or the roof of a car, for example, or another large sheet metal part.
the sheet metal plate 8 is placed on the lower tool 1 and the lower tool 1 and upper tool 2 are then moved together until the sheet metal plate is clamped in the parting plane 9 (FIG. 2) between the drawing ring 6 and the upper side of the lower tool 1, and at the same time the seal 5 the interior seals. Then pressure medium is fed into the chamber 3 in a controlled manner via the line 4, as indicated by the arrows, so that the circuit board 8 bulges out to form a type of membrane 10.
the protrusion of the drawing ring 6 above the highest elevation of the shape contour on the die 7 is designed such that after the preforming phase shown in FIG. 2 has been completed, the sheet has undergone an elongation of about 10 to 15% until it touches the shape contour in the region of its highest elevation .
This expansion can be set very precisely on the one hand by correspondingly controlling the pressure medium and on the other hand by controlling the clamping force in the parting plane 9. With further pressurization, the sheet is finally molded onto the entire contour of the die 7, as shown in FIG. 3. If necessary, the clamping force can be reduced in a controlled manner so that the sheet metal can retighten in the parting plane 9 without further expansion of the sheet metal in the final shaping phase and finally the sheet metal molded part 11 shown in FIG. 3 is obtained.
the molded part 11 has a relatively high edge 12, which is undesirable in the given case, so that the molded part 11 still has to be trimmed after the shaping process and the material in the region 12 accumulates as waste.
the form punch 7 can be displaceable relative to the drawing ring 6 in an embodiment not shown. As a result, it is initially possible to position the die for the preform phase in a reproducible manner with reference to the parting plane 9. Furthermore, after the preforming phase according to FIG.
the forming die 7 can be moved in the direction of the parting plane 9 with a reduction in the distance, so that on the one hand the degree of deformation in the outer region of the preforming part 10 is reduced and on the other hand the unnecessary excess material 12 (see FIG. 3) is avoided can, to the extent that the finished molded part 11 no longer has to be trimmed.

Landscapes

Physics & Mathematics (AREA)
Fluid Mechanics (AREA)
Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Shaping Metal By Deep-Drawing, Or The Like (AREA)
Straightening Metal Sheet-Like Bodies (AREA)
Forging (AREA)

EP95112736A 1994-09-29 1995-08-12 Méthode pour le formage des tÔles Revoked EP0704258B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4434799A DE4434799A1 (de)	1994-09-29	1994-09-29	Verfahren und Vorrichtung zum Umformen von Metallblech
DE4434799		1994-09-29

Publications (2)

Publication Number	Publication Date
EP0704258A1 true EP0704258A1 (fr)	1996-04-03
EP0704258B1 EP0704258B1 (fr)	1998-06-10

Family

ID=6529503

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP95112736A Revoked EP0704258B1 (fr)	1994-09-29	1995-08-12	Méthode pour le formage des tÔles

Country Status (5)

Country	Link
US (1)	US5632172A (fr)
EP (1)	EP0704258B1 (fr)
JP (1)	JPH08174091A (fr)
DE (2)	DE4434799A1 (fr)
ES (1)	ES2119278T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19734277A1 (de) *	1997-08-07	1999-02-18	Forschungsges Umformtechnik	Verfahren und Vorrichtung zum Tiefziehen mittels Druckmedium
DE19732413A1 (de) *	1997-07-28	1999-02-18	Forschungsges Umformtechnik	Verfahren und Vorrichtung zum kombinierten Hydro-Umformen von Metallblech
EP1005930A1 (fr) *	1998-12-03	2000-06-07	KUKA Werkzeugbau Schwarzenberg GmbH	Procédé et dispositif pour former hydrauliquement des pièces
EP1243354A2 (fr) *	2001-03-23	2002-09-25	Schuler SMG GmbH & Co. KG	Dispositif pour l' emboutissage profond hydromécanique de tôles
CN102357584A (zh) *	2011-11-02	2012-02-22	哈尔滨工业大学	一种双层板材成对胀形成形的方法

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19624036A1 (de) *	1996-06-17	1997-12-18	Matthias Prof Dr Ing Kleiner	Verfahren und Werkzeugsystem zum pneumomechanischen Tiefziehen
DE19649629C2 (de) *	1996-12-02	1999-01-07	Forschungsges Umformtechnik	Flexibel einsetzbares Werkzeug zum Hydroumformen eines Bleches
DE19751035C2 (de) *	1997-11-18	2000-09-07	Forschungsges Umformtechnik	Verfahren und Vorrichtung zum Umformen eines Werkstückes unter Einwirkung eines Druckmediums
DE19833550B4 (de) *	1998-07-24	2005-10-27	Tower Automotive Hydroforming Gmbh & Co. Kg	Umformwerkzeug zum Umformen mittels eines Druckmittels
US6000271A (en) *	1998-11-06	1999-12-14	Ap Parts International, Inc.	Metal forming apparatus and method of use
GB2354730B (en) *	1999-09-28	2001-09-12	Neutron Holdings Ltd	Apparatus for, and method of, moulding an article
DE19953522A1 (de) *	1999-11-05	2001-05-17	Porsche Ag	Verfahren zur Herstellung eines großflächigen Blechteiles, insbesondere eines Karosseriebauteiles für ein Fahrzeug
DE10016803B4 (de) *	2000-04-05	2006-06-08	Thyssenkrupp Steel Ag	Verfahren zum Herstellen von Bauteilen
JP4082070B2 (ja)	2001-05-10	2008-04-30	住友金属工業株式会社	金属板の液圧バルジ成形方法、金型および成形品
US7013694B1 (en)	2004-05-14	2006-03-21	Steven Don Sims	Portable, metal bending apparatus
US9522419B2 (en) *	2008-05-05	2016-12-20	Ford Global Technologies, Llc	Method and apparatus for making a part by first forming an intermediate part that has donor pockets in predicted low strain areas adjacent to predicted high strain areas
US20090272171A1 (en) *	2008-05-05	2009-11-05	Ford Global Technologies, Llc	Method of designing and forming a sheet metal part
DE102009022669B3 (de) *	2009-05-26	2010-12-30	RW Sollinger Hütte GmbH	Verfahren zum Erzeugen eines räumlich gekrümmten Bleches aus einer ebenen Blechplatte zur Aufnahme einer Schotterbettverfüllung bei Bahnbrücken
KR101419383B1 (ko) *	2012-06-05	2014-07-16	자동차부품연구원	다중 핀 및 액압 결합형 성형장치 및 이를 이용한 성형방법
CN110314971B (zh) *	2019-08-05	2020-05-12	哈尔滨工业大学	一种板材粘性介质压力成形回弹自适应控制方法
CN111570601A (zh) *	2020-05-18	2020-08-25	广东志成电液科技有限公司	一种薄板箱体液压成型设备和方法
BR102021004995A2 (pt) *	2021-03-16	2022-09-20	Maykel Motta	Máquina de estampagem por hidroconformação
CN113600668A (zh) *	2021-08-06	2021-11-05	山东盛润汽车有限公司	一种液体罐体涨形成型结构及工艺
CN113860726A (zh) *	2021-09-02	2021-12-31	英特派铂业股份有限公司	一种玻纤漏板底板一体成型制备方法

Citations (5)

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Publication number	Priority date	Publication date	Assignee	Title
GB1461317A (en) *	1974-09-24	1977-01-13	Ti Superform Ltd	Forming ductile metal
DE2640591A1 (de) *	1976-09-09	1978-03-16	Bosch Gmbh Robert	Verfahren zum formen muldenfoermiger verpackungs-leichtbehaelter
JPS56144837A (en) *	1980-04-15	1981-11-11	Dainippon Printing Co Ltd	Method and device for production of thin-walled metallic vessel
EP0231677A1 (fr) *	1985-12-04	1987-08-12	Sollac	Procédé et dispositif d'emboutissage de matériaux en feuille, à faible allongement
JPH05212464A (ja) *	1992-02-05	1993-08-24	Nippon Steel Corp	液圧及び金型の併用による金属薄板の成形方法

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1994
- 1994-09-29 DE DE4434799A patent/DE4434799A1/de not_active Withdrawn
1995
- 1995-08-12 DE DE59502479T patent/DE59502479D1/de not_active Revoked
- 1995-08-12 EP EP95112736A patent/EP0704258B1/fr not_active Revoked
- 1995-08-12 ES ES95112736T patent/ES2119278T3/es not_active Expired - Lifetime
- 1995-09-19 US US08/530,726 patent/US5632172A/en not_active Expired - Fee Related
- 1995-09-25 JP JP7246502A patent/JPH08174091A/ja active Pending

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Publication number	Priority date	Publication date	Assignee	Title
GB1461317A (en) *	1974-09-24	1977-01-13	Ti Superform Ltd	Forming ductile metal
DE2640591A1 (de) *	1976-09-09	1978-03-16	Bosch Gmbh Robert	Verfahren zum formen muldenfoermiger verpackungs-leichtbehaelter
JPS56144837A (en) *	1980-04-15	1981-11-11	Dainippon Printing Co Ltd	Method and device for production of thin-walled metallic vessel
EP0231677A1 (fr) *	1985-12-04	1987-08-12	Sollac	Procédé et dispositif d'emboutissage de matériaux en feuille, à faible allongement
JPH05212464A (ja) *	1992-02-05	1993-08-24	Nippon Steel Corp	液圧及び金型の併用による金属薄板の成形方法

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19732413A1 (de) *	1997-07-28	1999-02-18	Forschungsges Umformtechnik	Verfahren und Vorrichtung zum kombinierten Hydro-Umformen von Metallblech
DE19732413B4 (de) *	1997-07-28	2005-03-24	Forschungsgesellschaft Umformtechnik Mbh	Verfahren und Vorrichtung zum kombinierten Hydro-Umformen von Metallblech
DE19734277A1 (de) *	1997-08-07	1999-02-18	Forschungsges Umformtechnik	Verfahren und Vorrichtung zum Tiefziehen mittels Druckmedium
DE19734277C2 (de) *	1997-08-07	2000-04-20	Forschungsges Umformtechnik	Vorrichtung zum Tiefziehen eines Bleches mittels Druckmedium
EP1005930A1 (fr) *	1998-12-03	2000-06-07	KUKA Werkzeugbau Schwarzenberg GmbH	Procédé et dispositif pour former hydrauliquement des pièces
EP1243354A2 (fr) *	2001-03-23	2002-09-25	Schuler SMG GmbH & Co. KG	Dispositif pour l' emboutissage profond hydromécanique de tôles
EP1243354A3 (fr) *	2001-03-23	2003-07-16	Schuler SMG GmbH & Co. KG	Dispositif pour l' emboutissage profond hydromécanique de tôles
CN102357584A (zh) *	2011-11-02	2012-02-22	哈尔滨工业大学	一种双层板材成对胀形成形的方法

Also Published As

Publication number	Publication date
ES2119278T3 (es)	1998-10-01
JPH08174091A (ja)	1996-07-09
DE59502479D1 (de)	1998-07-16
US5632172A (en)	1997-05-27
EP0704258B1 (fr)	1998-06-10
DE4434799A1 (de)	1996-04-04

Publication	Publication Date	Title
EP0704258A1 (fr)	1996-04-03	Méthode et dispositif pour le formage des tÔles
EP2062987B1 (fr)	2010-01-06	Presse de moulage à chaud
DE102008017728B4 (de)	2012-05-16	Verfahren zur Materialflusssteuerung beim Tiefziehen eines Werkstücks
DE102012100230B4 (de)	2017-10-19	Vorrichtung und Verfahren zur Herstellung von Schalenteilen
EP3401032B1 (fr)	2022-07-06	Outil composite et procédé de fabrication d'un élément en tôle
DE102010048104B3 (de)	2011-12-15	Verfahren zur Herstellung eines Werkzeugs zum Umformen und/oder Schneider eines Blechmaterials
DE102006007224A1 (de)	2007-08-16	Verfahren und Vorrichtung zum Herstellen eines Ausschnittes oder Durchbruchs in der Wandung eines nach dem Innenhochdruck-Umformverfahren ausgebildeten Bauteils
EP0288705A2 (fr)	1988-11-02	Procédé de fabrication de pièces compliquées en tôle et dispositif pour réaliser le procédé
EP1097758B1 (fr)	2004-12-01	Méthode de formage d' une large tôle, en particulier une partie de carrosserie d'un véhicule
DE69906537T2 (de)	2003-12-24	Vorrichtung und verfahren zum streckformen
DE19842750B4 (de)	2005-06-09	Verfahren und Herstellung von tiefgezogenen Hohlteilen und Ziehwerkzeug
DE10324244A1 (de)	2004-12-30	Verfahren zur Herstellung individualisierter Außenhautblechteile aus in Serienfertigung hergestellten Serienaußenhautblechteilen für Fahrzeuge sowie nach diesem Verfahren hergestellte Außenhautblechteile
DE102009005261A1 (de)	2010-07-22	Verfahren zur Herstellung eines komplexen Blechformteils
DE19717953A1 (de)	1998-10-29	Verfahren zum hydromechanischen Stülpziehen von Metallblechen
DE69909485T2 (de)	2004-05-27	Vorrichtung und verfahren zum formen von flachen gegenständen
DE4034625A1 (de)	1992-05-07	Ziehverfahren
EP1029611B1 (fr)	2003-05-14	Dispositif pour la fabrication de produits creux courbes contre-dépouillés par hydroformage
DE19506067C1 (de)	1996-06-20	Verfahren zum Ausschneiden eines Ausschnitts aus der Wandung eines als Hohlkörper ausgebildeten Bauteils und Vorrichtung zur Durchführung des Verfahrens
DE102017102356B3 (de)	2018-04-12	Verfahren und Vorrichtung zum Herstellen eines Kragens an einem Werkstück
DE10313072B4 (de)	2006-02-09	Verfahren und Vorrichtung zum hydromechanischen Tiefziehen
DE102004054120B4 (de)	2006-08-24	Verfahren zum Umformen einer großflächigen Blechplatine zu einem Formteil, wie einem Außenhautteil einer Kraftfahrzeugkarosserie
DE102014213196A1 (de)	2016-01-14	Formwerkzeug zur Herstellung von warmumgeformten Bauteilen
DE4436437C2 (de)	1996-09-05	Verfahren zum hydrostatischen Umformen von insbesondere ebenen Blechen aus kaltumformbarem Metall und diesbezügliche Vorrichtung zur Durchführung des Verfahrens
EP0339060B1 (fr)	1992-01-02	Outil de moulage par compression pour la fabrication de plaques moulees a couches multiples
DE102004035758B4 (de)	2009-08-27	Verfahren und Vorrichtung zur Herstellung eines Dekorvorformlinges

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