EP0858848B1 - Appareil de formage - Google Patents

Appareil de formage Download PDF

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Publication number
EP0858848B1
EP0858848B1 EP98102248A EP98102248A EP0858848B1 EP 0858848 B1 EP0858848 B1 EP 0858848B1 EP 98102248 A EP98102248 A EP 98102248A EP 98102248 A EP98102248 A EP 98102248A EP 0858848 B1 EP0858848 B1 EP 0858848B1
Authority
EP
European Patent Office
Prior art keywords
pressure
counter
forming apparatus
internal high
tool
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
Application number
EP98102248A
Other languages
German (de)
English (en)
Other versions
EP0858848A1 (fr
Inventor
Peter Dr. Bieling
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.)
Anton Bauer Werkzeug- und Maschinenbau & Co KG GmbH
Original Assignee
Anton Bauer Werkzeug- und Maschinenbau & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE19705244A priority Critical patent/DE19705244A1/de
Application filed by Anton Bauer Werkzeug- und Maschinenbau & Co KG GmbH filed Critical Anton Bauer Werkzeug- und Maschinenbau & Co KG GmbH
Priority to EP98102248A priority patent/EP0858848B1/fr
Priority to DE29823606U priority patent/DE29823606U1/de
Publication of EP0858848A1 publication Critical patent/EP0858848A1/fr
Priority to US09/154,725 priority patent/US6041633A/en
Application granted granted Critical
Publication of EP0858848B1 publication Critical patent/EP0858848B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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
    • B21D26/025—Means for controlling the clamping or opening of the moulds
    • 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
    • B21D26/033—Deforming tubular bodies
    • B21D26/039—Means for controlling the clamping or opening of the moulds

Definitions

  • the invention relates to a hydroforming device with a multi-part Mold and one of the parts of the mold against the deformation holding clamping device.
  • DE-A-4 432 692 describes a generic high pressure forming device described a pot-like clamping device. A forming tool is put through the pot and a placed on it, braced against the pot and the forming tool Lid held together. A lifting cylinder is available for lifting and lowering the lid Available.
  • the shaping device according to the invention which achieves this object is characterized in that that the clamping device and / or the mold at least one, deformations of the mold cavity at least partially compensating during forming Counter-tensioning device.
  • a certain deformation of the tensioning device is taken or / and tool in purchase, but generated by applying clamping force one or more provided in the clamping device and / or the tool Counter clamping devices for compensating deformations, so that the mold cavity largely maintains its shape.
  • clamping and tool parts are less stable with less effort Material are made. This advantageously also reduces the mass and weight of the Total forming device.
  • counter-tensioning devices can be used are, in a preferred embodiment of the invention, the counter-tensioning device a back pressure chamber.
  • the back pressure chamber can be subjected to the working pressure, which is advantageous a device used for pressurizing the workpiece also for the Back pressure chamber can be used.
  • the back pressure chamber is in one against the Forming tool adjacent clamping jaws provided, e.g. between the back pressure chamber and the tool provided a relatively thin clamping jaw wall can be, which is under the influence of the back pressure against the tool bulges and thus counteracts yielding of the clamping jaw or / and tool.
  • a short-stroke cylinder in which the back pressure chamber is formed, engage the jaws.
  • the clamping jaw lies against the mold with one by pressurizing the back pressure chamber against the rest of the jaws movable part of the jaw, this movable part in particular in the manner of a guided in the jaw Pressure piston is formed.
  • the clamping piston moves Maintaining a suitable pressure in the back pressure chamber accordingly, so that the tool part against it remains in place.
  • This embodiment with a movable jaw part is particularly advantageous in an internal high-pressure forming device, in which the clamping jaws via a bayonet ring can be brought into the clamping system against the tool, one being a Tool holder for the bayonet ring and a counter bearing forms. Due to the possibility of compensation via the jaws with the back pressure chamber Above all, defuse the strength requirements for the locking parts the bayonet lock, which therefore need to be less solid.
  • the back pressure chamber is including a pressure connection channel, provided with a sealing lining, which, in particular, through a plastic membrane that fills the counter-pressure chamber like a balloon can be formed.
  • a sealing liner is mainly used for the embodiment mentioned with a pressure piston-like jaw part is advantageous, because then the pressure piston is not particularly sealed in its guidance needs.
  • the drawing shows a hydroforming device in a sectional view.
  • a pot-shaped tool holder 1 with a bottom wall 2 and a vertical cylinder wall 3 drawn.
  • the bottom wall 2 is one over one Large part of the wall surface extending opening 4 is provided.
  • the cylinder wall 3 opposite openings 5 and 6 are formed.
  • a clamping jaw 7 is on the other hand rotatable via a hydraulic cylinder 8 Bayonet ring 9 in engagement.
  • a clamping jaw counter plate 10 is arranged opposite the clamping jaw 7, which rests on a shoulder formed by the remaining part of the base plate 2.
  • a mold is between the clamping jaw 7 and the clamping counter plate 10 arranged with an upper part 11 and a lower part 12.
  • a workpiece 13 formed by reshaping a tube.
  • the clamping jaw 7 has an upper part 14 with an annular recess into which one of the Bayonet ring engages inwardly projecting ring web 15. Below the ring web 14 is the jaws 7 slightly expanded in diameter.
  • the reference numeral 16 denotes a lower part of the clamping jaw 7, which one in the type of a pressure piston in a recess in the upper part 14 of the jaw 7 has guided upper section and with an annular shoulder 18 against the bottom of the Upper jaw part 14 can be applied.
  • the ring shoulder 18 bears against the underside of the upper jaw part 14 remains through the upper jaw part 14 and the Lower jaw part 16 formed back pressure chamber 17, which via a connecting channel 19 can be acted upon by fluid pressure.
  • the back pressure chamber 17 and the connecting channel 19 are lined with a sealing plastic membrane 20.
  • the bayonet ring 9 engages with locking teeth 21 arranged on its circumference in a Ring recess 22 in the cylinder wall 3, the locking teeth in a rotational position reach behind corresponding locking teeth 23 on the cylinder wall 3.
  • the bayonet ring can be lifted upwards with the clamping jaw 7 are, the locking teeth 21 of the bayonet ring 9 between the locking teeth 23rd be passed through on the cylinder wall 3.
  • the bayonet ring 9 with the clamping jaw 7 first lowered, the locking teeth 21 of the bayonet ring 9 between the locking teeth 23 on the upper edge of the cylinder wall 3 of the tool holder 1.
  • the bayonet ring is then rotated, the Teeth 21 of the bayonet ring 9 engage behind the locking teeth 23 on the cylinder wall 3.
  • the fluid pressure supply lines 26 and 27 in the manner shown in the figure via sealing means, not shown, to the tubular Workpiece 13 attached and a fluid, in the present case water, under pressure in introduced the workpiece.
  • a fluid in the present case water
  • fluid is injected into the back pressure chamber at the same pressure 17 let in.
  • the tubular workpiece deforms and increasingly creates the mold walls of the tool parts 11 and 12, which in particular in the vertical Direction between the jaws 7 and the upper tool part 11 or the jaw counter plate 10 and the lower tool part 12 effective pressing force is increased.
  • the tool holder 1 with the jaw counter plate 10 and the clamping jaw 7 formed clamping device, in particular in the region of the bayonet ring 9 is counteracted in that the prevailing in the back pressure chamber 17 Back pressure moves the lower jaw part 18 downwards to compensate, which thus holds the workpiece parts in place while keeping the height of the mold cavity constant Job holds.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (12)

  1. Dispositif de formage à haute pression interne présentant un outil de moulage à plusieurs pièces et un dispositif de serrage (1, 7, 9, 10) maintenant ensemble les pièces (11, 12) de l'outil de moulage contre la charge de forrnage, caractérisé en ce que le dispositif de serrage et/ou l'outil de moulage présente au moins un dispositif de contre-serrage (16 - 20) compensant au moins partiellement des déformations de l'espace creux de moulage lors du formage.
  2. Dispositif de formage à haute pression interne selon la revendication 1, caractérisé en ce que le dispositif de contre-serrage comprend une chambre de contre-pression (17).
  3. Dispositif de formage à haute pression interne selon la revendication 2, caractérisé en ce que la chambre de contre-pression (17) est prévue pour l'alimentation de la pression de travail (Pi) du dispositif de formage.
  4. Dispositif de formage à haute pression interne selon la revendication 2 ou 3, caractérisé en ce qu'on a prévu, pour la chambre de contre-pression, un dispositif d'alimentation de pression indépendant de la production de la pression de travail pour l'alimentation avec une pression réglable en particulier.
  5. Dispositif de formage à haute pression interne selon l'une quelconque des revendications 2 à 4, caractérisé en ce que la chambre de contre-pression (17) est prévue dans une mâchoire de serrage (7) placée contre l'outil de moulage (11, 12).
  6. Dispositif de formage à haute pression interne selon la revendication 5, caractérisé en ce que la mâchoire de serrage (7) est située contre l'outil de moulage (11, 12) avec une pièce (18) de la mâchoire de serrage mobile par l'alimentation en pression de la chambre de contre-pression (17) contre l'autre mâchoire de serrage.
  7. Dispositif de formage à haute pression interne selon la revendication 6, caractérisé en ce que la pièce mobile (18) de la mâchoire de serrage présente une section formée comme un cylindre de pression guidé dans la mâchoire de serrage.
  8. Dispositif de formage à haute pression interne selon l'une quelconque des revendications 5 à 7, caractérisé en ce que la mâchoire de serrage (7) peut être comprimée via un anneau à baïonnette (9) contre l'outil (11, 12), un dispositif de fixation (1) de l'outil de moulage comprenant une mâchoire de contre-serrage (10) formant une butée pour l'anneau à baïonnette.
  9. Dispositif de formage à haute pression interne selon la revendication 8, caractérisé en ce que le dispositif de fixation de l'outil (1) est exécuté en forme de creuset, en particulier avec une mâchoire de contre-serrage (10) pouvant être placée contre le fond du creuset (2).
  10. Dispositif de formage à haute pression interne selon l'une quelconque des revendications 2 à 9, caractérisé en ce que la chambre de contre-pression (17), en particulier y compris un canal de liaison de pression (19), est pourvue d'un revêtement (20) qui rend étanche.
  11. Dispositif de formage à haute pression interne selon la revendication 10, caractérisé en ce que le revêtement est formé par une membrane en matériau synthétique (20) remplissant la chambre de contre-pression (17) de manière analogue à un ballon.
  12. Dispositif de formage à haute pression interne selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la chambre de contre-pression et/ou une autre chambre de contre-pression est formée dans un cylindre à course courte agissant sur une mâchoire de serrage.
EP98102248A 1997-02-12 1998-02-10 Appareil de formage Expired - Lifetime EP0858848B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19705244A DE19705244A1 (de) 1997-02-12 1997-02-12 Umformvorrichtung
EP98102248A EP0858848B1 (fr) 1997-02-12 1998-02-10 Appareil de formage
DE29823606U DE29823606U1 (de) 1997-02-12 1998-02-10 Umformvorrichtung
US09/154,725 US6041633A (en) 1997-02-12 1998-09-17 Forming apparatus

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19705244A DE19705244A1 (de) 1997-02-12 1997-02-12 Umformvorrichtung
DE19705244 1997-02-12
EP98102248A EP0858848B1 (fr) 1997-02-12 1998-02-10 Appareil de formage
DE29823606U DE29823606U1 (de) 1997-02-12 1998-02-10 Umformvorrichtung
US09/154,725 US6041633A (en) 1997-02-12 1998-09-17 Forming apparatus

Publications (2)

Publication Number Publication Date
EP0858848A1 EP0858848A1 (fr) 1998-08-19
EP0858848B1 true EP0858848B1 (fr) 2001-10-17

Family

ID=27438546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102248A Expired - Lifetime EP0858848B1 (fr) 1997-02-12 1998-02-10 Appareil de formage

Country Status (3)

Country Link
US (1) US6041633A (fr)
EP (1) EP0858848B1 (fr)
DE (2) DE19705244A1 (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6164108A (en) * 1998-07-21 2000-12-26 Aquaform, Inc. Hydro compression tube forming die apparatus and method for making the same
DE19833550B4 (de) * 1998-07-24 2005-10-27 Tower Automotive Hydroforming Gmbh & Co. Kg Umformwerkzeug zum Umformen mittels eines Druckmittels
DE19858837B4 (de) * 1998-12-19 2005-03-17 Bayerische Motoren Werke Ag Presse zum Innenhochdruckumformen
NO991608L (no) * 1999-03-31 2000-10-02 Norsk Hydro As Feste/lÕseanordning
CA2312229C (fr) * 1999-06-21 2007-06-19 Aida Engineering Co., Ltd. Methode et dispositif d'hydroformage
US6298701B1 (en) * 1999-08-31 2001-10-09 Dana Corporation Mechanical press structure adapted to perform hydroforming operations
DE19957888C2 (de) * 1999-12-01 2002-11-14 Benteler Werke Ag Vorrichtung zum hydraulischen Hochdruckformen eines rohrförmigen Bauteils oder einer Platine
KR100472607B1 (ko) * 2000-06-16 2005-03-08 도요다 지도샤 가부시끼가이샤 형틀조임장치 및 형틀조임방법
WO2002047839A1 (fr) * 2000-12-12 2002-06-20 Schweitzer, Karl, Heinz Dispositif et procede de formage sous haute pression interne (innenhochdruckumformung : ihu) et systeme d'outillage de formage sous haute pression interne
DE10113224A1 (de) * 2001-03-19 2002-10-02 Ap & T Schaefer Technologie Gm Schließeinheit für gegen aufgehende Kräfte zusammenzupressende Werkzeuge
DE10139135A1 (de) * 2001-08-09 2003-02-20 Bayerische Motoren Werke Ag Umformvorrichtung, insbesondere zur Innenhochdruckumformung
US6446476B1 (en) * 2001-11-30 2002-09-10 General Motors Corporation Hydroforming method and apparatus
AU2003222539A1 (en) * 2002-05-08 2003-11-11 Flow Holdings Sagl Device and method for expansion forming
FR2850593B1 (fr) * 2003-01-31 2006-09-08 Bourgogne Hydro Technologie Dispositif d'hydroformage d'un corps creux
DE10334660B3 (de) † 2003-07-30 2004-11-04 Theodor Gräbener GmbH & Co. KG Vorrichtung zur Herstellung von Formteilen durch Innenhochdruckumformung
US7251973B2 (en) * 2005-09-12 2007-08-07 Gharib Mohamed T Hydroforming apparatus
JP4374399B1 (ja) * 2008-07-04 2009-12-02 新日本製鐵株式会社 ハイドロフォーム加工方法及びハイドロフォーム加工品
EP2221125B1 (fr) * 2009-02-20 2011-09-28 Theodor Gräbener GmbH & Co. KG Outil d'hydroformage
CN103212619B (zh) * 2013-04-10 2015-04-22 宁波帕沃尔精密液压机械有限公司 一种变合模力的管材内高压成形装置和方法
DE202017106654U1 (de) 2017-11-03 2018-01-11 Wvl-Werkzeug- Und Vorrichtungsbau Lichtenstein Gmbh Formbackensystem eines Innenhochdruck-Umformwerkzeuges
KR20230048624A (ko) * 2020-08-11 2023-04-11 스미도모쥬기가이고교 가부시키가이샤 성형장치, 및 금속파이프

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Also Published As

Publication number Publication date
DE19705244A1 (de) 1998-08-13
DE29823606U1 (de) 1999-09-02
EP0858848A1 (fr) 1998-08-19
US6041633A (en) 2000-03-28

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