EP1442806B1 - Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers - Google Patents

Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers Download PDF

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Publication number
EP1442806B1
EP1442806B1 EP04290264A EP04290264A EP1442806B1 EP 1442806 B1 EP1442806 B1 EP 1442806B1 EP 04290264 A EP04290264 A EP 04290264A EP 04290264 A EP04290264 A EP 04290264A EP 1442806 B1 EP1442806 B1 EP 1442806B1
Authority
EP
European Patent Office
Prior art keywords
tool
frame
hollow body
central recess
hydroforming
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
EP04290264A
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English (en)
French (fr)
Other versions
EP1442806A1 (de
Inventor
Jean-Pierre Chopard
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.)
HYDROPROCESS
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HYDROPROCESS
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Publication date
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Publication of EP1442806A1 publication Critical patent/EP1442806A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • B21D26/033—Deforming tubular bodies
    • B21D26/039—Means for controlling the clamping or opening of the moulds

Definitions

  • the present invention relates to a device for forming a metal hollow body or the like by introducing inside said hollow body of a fluid under high pressure according to a so-called hydroforming process.
  • devices comprising a tool comprising a mold in two parts between which the hollow body to be formed are positioned, said mold being positioned under a press to compensate for the hydrostatic pressure of the fluid introduced into the hollow body.
  • the pressure of the hydroforming fluid can reach 6000 bar, the tools of these devices are particularly bulky in order to withstand the forces induced by the pressure exerted inside the mold.
  • the tool is fixed and positioned under the press, the frame of the generally parallelepiped-shaped press being provided with one or more jacks for closing the tool, so that said frame is also very large. which requires a major civil engineering that significantly increase the cost of these devices and ultimately hydroformed parts.
  • the device consists of a fixed upper cap and a fixed lower base defining between them a hydroforming space for receiving a mold assembly comprising a lower plate and an upper plate, both generally rectangular.
  • the lower base of the device comprises a guide extending from the hydroforming space to a position of loading-unloading, and possibly preforming, located outside said hydroforming space.
  • the device further comprises means for moving the mold in order to move it from its loading-unloading position to its hydroforming position in the hydroforming space which has a height just greater than that of the mold set.
  • devices for forming a hollow metal body or the like have already been devised by introducing inside said hollow body a fluid under high pressure according to a so-called "hydroforming" process.
  • a frame consisting of an open hollow part adapted to receive the tool, said tool being introduced into the frame by translation along the axis of revolution of said frame.
  • This device comprises a source of pressurized fluid, a cylindrical frame comprising a cylindrical central recess, a tubular piece to be formed and a tool comprising one or more parts in which is introduced a generally cylindrical mandrel.
  • Said mandrel is able to be positioned inside the tubular part itself to be placed inside the tool which has a generally cylindrical central recess when the different parts of the tool are assembled.
  • the source of pressurized fluid is connected to the mandrel placed inside the tubular part to be formed.
  • This type of device has the disadvantage of not allowing the forming of parts of complex shapes, the parts to be able to accommodate the mandrel.
  • One of the aims of the invention is therefore to remedy all these disadvantages by providing a hydroforming device of simple and inexpensive design to optimize the tools and reduce the size of these devices.
  • a device for forming a metal hollow body or the like by introducing inside said hollow body of a fluid under high pressure according to a process known as hydroforming said device comprising on the one hand, at least one tool consisting of at least two parts respectively provided with a draft and adapted to receive the metal hollow body to be formed, and secondly a frame made of a part hollow open at least one of its ends and able to accommodate the tooling; this device is remarkable in that it has an arrangement according to claim 1.
  • the device consists of a frame 1 of generally parallelepipedal shape comprising a central recess 2 frustoconical section shaped regular hexagon, that is to say a central recess 2 of section in the form of regular hexagon whose section narrows from its upper end to its bottom, said central recess 2 being directed upwards.
  • the central opening 2 of the frame 1 is adapted to receive a tool 3 consists of two parts 3a and 3b respectively provided with an undercut 4, 4b which is positioned in the hollow metal body 5 to be formed.
  • the device furthermore comprises a tubular structure constituted by uprights 15 of crosspieces 16 and longitudinal members 17 extending above the frame 1 and carrying pipes 18 for supplying pressurized fluid connected to a pressurized fluid generator 19 controlled by a control panel 20.
  • the tooling 3 is introduced by vertical translation in the central recess 2 of the frame 1 by moving upwardly the frame 1 along the uprights 15 of the structure 14 by means of hydraulic cylinders for example, not shown in Figure 4.
  • the remains 4 a , 4 b of the tool 3 may include stamping means, such as an undercut for example, which stamps the hollow body 5 during the introduction of the tool 3 in the recess 2 of the frame.
  • stamping means such as an undercut for example, which stamps the hollow body 5 during the introduction of the tool 3 in the recess 2 of the frame.
  • water under pressure is introduced into the hollow body 5 during said pre-forming, the pressure of the water being preferably slightly lower the pressure exerted by the undercut on the hollow body 5.
  • the tool 3 can be introduced into the central recess 2 of the fixed frame 1 by a vertical translation of said tool 3 by means of hydraulic cylinders without departing from the scope of the invention.
  • the central recess 2 of the frame 1 may have a regular or irregular polygon section.
  • the tool 3 further comprises an input channel not shown extending from one end of said equipment 3 and opening into the volume defined by the bodies 4, 4b of said equipment 3 and an outlet channel not shown extending from a second end of said tooling 3 and opening into said volume defined by the bodies 4a, 4b of the tools 3.
  • a pressurized fluid said hydroforming fluid is introduced through the inlet channel to the inside the hollow body 5 positioned in the tool 3, the outlet channel being closed by closure means, not shown in the figure.
  • Ways feed 19 provide the hydroforming fluid at a hydroforming pressure P1 of up to 6000 bar.
  • the outlet channel is open to allow the escape of the hydroforming fluid introduced into the tool 3.
  • the tool 3 comprises more than two parts thus forming a plurality of joint planes, at least two separate joint planes, which make it possible to hydroform parts of complex shapes.
  • the devices of the prior art comprising a hydraulic press have a single joint plane which prevents the production of complex shaped parts, the demolding of the hydroformed part can be performed only in one plane.
  • the devices of the prior art can of course include retractable drawers housed in the tool, which significantly affect the manufacturing costs of these tools.
  • the frame 1, the central recess 2, the tool 3 comprises sealing means not shown in the figures as well as sensors positioned in particular in the bodies 4a, 4b of the tools 3 to to measure the pressures, without departing from the scope of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Pressure Vessels And Lids Thereof (AREA)

Claims (5)

  1. Vorrichtung für die Umformung eines metallischen Hohlkörpers (5) oder Ähnlichem durch Einführung einer Hochdruckflüssigkeit in das Innere des besagten Hohlkörpers (5) gemäß einem Prozess, der sich Innenhochdruckumformung nennt, wobei die besagte Vorrichtung einerseits zumindest ein Werkzeug (3) umfasst, das aus zumindest zwei Teilen (3a, 3b) besteht, die jeweils mit einer Rücknahme (4a, 4b) ausgestattet und imstande sind, den umzuformenden, metallischen Hohlkörper (5) aufzunehmen, und andererseits ein Gestell (1), das aus einem hohlen Drehteil besteht, das an zumindest einem seiner Enden offen und imstande ist, das Werkzeug (3) aufzunehmen, dadurch gekennzeichnet, dass das Gestell (1) eine zentrale Aussparung (2) mit kegelstumpfartiger Form umfasst, die nach oben ausgerichtet und imstande ist, das Werkzeug (3) aufzunehmen, das ebenfalls eine kegelstumpfartige Form aufweist, und dadurch, dass die Vorrichtung eine Rohrstruktur (14) umfasst, die aus Stützen (15) besteht, wobei das besagte Werkzeug (3) in die zentrale Aussparung (2) des Gestells (1) durch senkrechtes Verschieben entlang der Stützen (15) der Struktur (14) eingeführt wird.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Rohrstruktur (14) Längsträger (17) umfasst, die sich über dem Gestell (1) erstrecken und Zuleitungen (18) für die Druckflüssigkeit tragen.
  3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Hydraulikheber umfasst, die eingerichtet sind, um das Gestell (1) zum Einführen des Werkzeugs (3) in die zentrale Aussparung (2) des Gestells (1) durch senkrechtes Verschieben entlang der Stützen (15) der Struktur (14) nach oben zu bewegen.
  4. Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass sie Hydraulikheber umfasst, die eingerichtet sind, um das Werkzeug (3) in die zentrale Aussparung (2) des festsitzenden Gestells (1) durch eine senkrechte Verschiebung des besagten Werkzeugs (3) einzuführen.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rücknahmen (4a, 4b) des Werkzeugs (3) Tiefziehmittel zum Tiefziehen des Hohlkörpers (5) beim Einführen des Werkzeugs (3) in die zentrale Aussparung (2) des Gestells (1) umfassen.
EP04290264A 2003-01-31 2004-02-02 Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers Expired - Lifetime EP1442806B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0301111 2003-01-31
FR0301111A FR2850593B1 (fr) 2003-01-31 2003-01-31 Dispositif d'hydroformage d'un corps creux

Publications (2)

Publication Number Publication Date
EP1442806A1 EP1442806A1 (de) 2004-08-04
EP1442806B1 true EP1442806B1 (de) 2008-03-26

Family

ID=32605976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290264A Expired - Lifetime EP1442806B1 (de) 2003-01-31 2004-02-02 Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers

Country Status (5)

Country Link
EP (1) EP1442806B1 (de)
AT (1) ATE390223T1 (de)
DE (1) DE602004012630T2 (de)
ES (1) ES2305674T3 (de)
FR (1) FR2850593B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018203987B3 (de) 2018-03-15 2019-03-21 Bayerische Motoren Werke Aktiengesellschaft Werkzeug zum Umformen sowie Verfahren zum Herstellen eines Bauteils und Verwendung eines Werkzeugs

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535901A (en) * 1966-06-03 1970-10-27 Tokyu Car Corp Mold for forming material by means of impulsive hydraulic pressure
US3685327A (en) * 1969-11-12 1972-08-22 Masanobu Nakamura Bulging apparatus
US5170557A (en) * 1991-05-01 1992-12-15 Benteler Industries, Inc. Method of forming a double wall, air gap exhaust duct component
US5582052A (en) * 1993-05-20 1996-12-10 Benteler Industries, Inc. Controlled time-overlapped hydroforming
DE19705244A1 (de) * 1997-02-12 1998-08-13 Huber & Bauer Gmbh Umformvorrichtung
CA2296098C (en) * 1997-07-18 2007-01-30 Cosma International Inc. Hydroforming of a tubular blank having an oval cross section and hydroforming apparatus
DE19810196A1 (de) * 1998-03-10 1999-09-16 Schade Gmbh & Co Kg Verfahren und Vorrichtung zum Biegen, Kalibrieren und Feinausformen von Sicken, Anlaeflächen und/oder Konizitäten in Hohlprofilen
DE19839526C1 (de) * 1998-08-29 1999-11-18 Daimler Chrysler Ag Verfahren und Vorrichtung zum Umformen eines Hohlkörpers
US6134931A (en) * 1999-05-26 2000-10-24 Husky Injection Molding Systems Ltd. Process and apparatus for forming a shaped article
US6305204B1 (en) * 2000-07-13 2001-10-23 The Boeing Company Bulge forming machine

Also Published As

Publication number Publication date
EP1442806A1 (de) 2004-08-04
DE602004012630D1 (de) 2008-05-08
ES2305674T3 (es) 2008-11-01
FR2850593A1 (fr) 2004-08-06
DE602004012630T2 (de) 2009-04-30
FR2850593B1 (fr) 2006-09-08
ATE390223T1 (de) 2008-04-15

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