EP0497438B1 - Procédé et dispositif d'elargissement de profils creux tubulaires - Google Patents

Procédé et dispositif d'elargissement de profils creux tubulaires Download PDF

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Publication number
EP0497438B1
EP0497438B1 EP92250022A EP92250022A EP0497438B1 EP 0497438 B1 EP0497438 B1 EP 0497438B1 EP 92250022 A EP92250022 A EP 92250022A EP 92250022 A EP92250022 A EP 92250022A EP 0497438 B1 EP0497438 B1 EP 0497438B1
Authority
EP
European Patent Office
Prior art keywords
support
piston
internal pressure
expansion
hollow profile
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.)
Revoked
Application number
EP92250022A
Other languages
German (de)
English (en)
Other versions
EP0497438A1 (fr
Inventor
Manfred Janssen
Friedrich Stiehle
Gerd Vogt
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25900633&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0497438(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0497438A1 publication Critical patent/EP0497438A1/fr
Application granted granted Critical
Publication of EP0497438B1 publication Critical patent/EP0497438B1/fr
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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
    • B21D26/047—Mould construction
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B21D53/90—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards axle-housings

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 4.
  • EP 0 372 360 discloses a method for producing tubular components, in which the difficulties described are avoided by mechanically deforming critical local deformations (small radii, unfavorable profile), for example with the aid of plungers. This allows the actual hydraulic forming to be carried out The extent to which an uncontrolled bulging cannot be expected. In order to support the desired uniform shaping, it is also proposed to apply the maximum internal pressure gradually. Since in many cases, because of the inaccessibility of the hollow profile, forming tools cannot be arranged for the additional mechanical expansion, the proposed method is not suitable for expanding elongated pipes with a large forming ratio.
  • the object of the invention is to provide an improved method for the hydraulic expansion of tubular elongate hollow profiles, with which, without additional or supplementary mechanical expansion, degrees of deformation of more than 15% can be achieved without material damage.
  • the outer support is not fixed to a predetermined end position, but is continuously moved away in a controlled manner.
  • the material is constantly in contact with the support and the internal pressure is kept at the level required for further flow.
  • a split die known per se, is used to carry out the method, each shaped element being connected to a piston-cylinder unit which can be controlled as a function of the path.
  • the die is placed on the initial shape of the area of the hollow profile to be formed.
  • the die is opened and each form element is controlled depending on the path in such a way that the length and circumference of the hollow profile is uniform in every phase Expansion is achieved.
  • This method has the advantage that degrees of deformation of more than 15% can be achieved without additional mechanical expansion.
  • Another advantage of the method is that not only symmetrical but also asymmetrical expansions are possible. This can be achieved by making the degree of movement of the shaped elements of the die different in order to widen a predetermined position.
  • the adjustment path of the die can be increased by carrying out a first uncritical expansion step with the die open and only then placing the die on the pre-expanded hollow profile.
  • the further expansion process up to the predetermined end position takes place in the manner already described above.
  • the advantage of the proposed method is the fact that an uncontrolled bulge (balloon effect) is prevented. In contrast to the usual free deformation, in this method the deformation is not carried out directly by the internal pressure, but by the support moving away.
  • Fig. 1 the manufacture of an axle box is shown as an example.
  • the starting product is a seamless or welded circular tube 1, which is to be expanded into a boiler 2 in a predetermined area.
  • the tube 1 is supported by a mold 3 which is firmly attached during the expansion process abuts the outer surface of the tube 1.
  • the tube 1 is encompassed, for example, by four shaped parts 5 arranged on the circumference.
  • the number of molded parts 5 forming the die can be smaller or larger, and the molded parts need not necessarily be of the same design and have the same circumferential extent.
  • a piston-cylinder unit 4 which can be controlled as a function of the path is arranged on each molded part 5.
  • a displacement sensor 6 is arranged on the hydraulic piston 7.
  • the expansion according to the invention takes place in such a way that, before the internal pressure p is applied, the molded parts 5 of the die bear on the outer surface of the area of the original tube 1 to be formed. Thereafter, the internal pressure p is increased continuously or stepwise to a value which is close to the flow limit for the material of the tube 1 used.
  • the piston-cylinder units 4 are continuously raised at the same time. This continues until the predetermined end position of the expansion has been reached in the area to be formed if the material continues to flow.
  • the control of the piston-cylinder units 4 can be improved in this way if one detects the internal pressure p with the help of a pressure sensor (not shown here) and gives it to a control circuit together with the piston travel detected by the displacement sensor 6.

Claims (7)

  1. Procédé pour l'élargissement hydraulique localisé ou par tronçons de profilés creux (1), en forme de tube, dans lequel après avoir rendu étanche les extrémités ouvertes une pression interne hydraulique est appliquée et le matériau de la zone à élargir (2) est pressé contre un appui (5) en forme d'anneau entourant le profilé creux (1),
    caractérisé en ce que, après le dépassement de la limite d'écoulement du matériau, l'appui (5) est déplacé continuellement, de façon contrôlée, avec un adossement continu du matériau contre l'appui et avec le maintien de la pression interne nécessaire pour l'écoulement supplémentaire, jusqu'à ce que la position extrême prédéfinie soit atteinte.
  2. Procédé selon la revendication 1,
    caractérisé en ce que, tout d'abord, on effectue un élargissement non critique sans appui et, ensuite, l'appui est disposé contre la zone préélargie (2) du profilé creux.
  3. Procédé selon la revendication 2,
    caractérisé en ce que le préélargissement vaut au maximum 15 %.
  4. Dispositif pour la mise en oeuvre du procédé selon les revendications 1 à 3 comportant une matrice séparée (5), dont les éléments individuels sont mobiles,
    caractérisé en ce que chaque élément (5) est relié à un vérin commandable (4) dépendant de la course.
  5. Dispositif selon la revendication 4,
    caractérisé en ce que les vérins (4) sont reliés ensemble de manière réglable.
  6. Dispositif selon la revendication 4,
    caractérisé en ce que chaque vérin (4) peut être commandé individuellement.
  7. Dispositif selon les revendications 4 à 6,
    caractérisé en ce que la détection de la pression interne p et de la course des vérins (4) fait partie d'un circuit de réglage.
EP92250022A 1991-01-28 1992-01-28 Procédé et dispositif d'elargissement de profils creux tubulaires Revoked EP0497438B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4102763 1991-01-28
DE4102763 1991-01-28
DE4201819 1992-01-21
DE4201819A DE4201819A1 (de) 1991-01-28 1992-01-21 Verfahren und vorrichtung zum hydraulischen aufweiten von rohrfoermigen hohlprofilen

Publications (2)

Publication Number Publication Date
EP0497438A1 EP0497438A1 (fr) 1992-08-05
EP0497438B1 true EP0497438B1 (fr) 1994-07-13

Family

ID=25900633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250022A Revoked EP0497438B1 (fr) 1991-01-28 1992-01-28 Procédé et dispositif d'elargissement de profils creux tubulaires

Country Status (3)

Country Link
EP (1) EP0497438B1 (fr)
DE (2) DE4201819A1 (fr)
ES (1) ES2056688T3 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142325C2 (de) * 1991-12-20 1996-06-13 Bayerische Motoren Werke Ag Verfahren zum Herstellen von Fahrwerksträgern
DE4232161A1 (de) * 1992-09-25 1994-03-31 Audi Ag Verfahren zum Herstellen eines Hohlkörpers
DE4337517A1 (de) * 1993-11-03 1995-05-04 Klaas Friedrich Verfahren zum Innenhochdruck-Umformen von hohlen abgesetzten Wellen aus kaltumformbarem Metall
JPH0732038A (ja) * 1993-04-10 1995-02-03 Gkn Automot Ag 輪郭を有する中空軸の製造方法
DE4337242A1 (de) * 1993-10-30 1995-05-04 Opel Adam Ag Geschweißte Kraftfahrzeug-Hinterachse
DE4427201C2 (de) * 1993-11-26 1996-09-12 Ges Innenhochdruckverfahren Verfahren zur Herstellung von hohlen Nockenwellen
DE19513444C2 (de) * 1995-04-13 1999-12-23 Konrad Schnupp Vorrichtung zum hydromechanischen Umformen
DE59504498D1 (de) * 1995-09-21 1999-01-21 Benteler Werke Ag Verfahren zur Herstellung eines Achsträgers
DE19705244A1 (de) * 1997-02-12 1998-08-13 Huber & Bauer Gmbh Umformvorrichtung
EP1197274B1 (fr) * 1997-04-16 2004-12-29 Cosma International Inc. Presse de formage hydraulique sous pression élevée
DE69828452D1 (de) * 1997-04-16 2005-02-03 Cosma Int Inc Innenhochdruckumformungspresse
DE19719628C2 (de) * 1997-05-09 2000-07-06 Daimler Chrysler Ag Verfahren und Einrichtung zur Herstellung von ausgebauchten Hohlprofilen
WO1999020414A1 (fr) 1997-10-20 1999-04-29 Josef Worringer Procede et dispositif pour produire un arbre a partir d'un element tubulaire, et arbre a cames produit a partir d'un element tubulaire
DE19756673A1 (de) * 1997-12-19 1999-07-01 Josef Worringer Verfahren zur Herstellung einer Welle aus einem Rohrstück, Vorrichtung zur Herstellung einer Welle aus einem Rohrstück und aus einem Rohrstück hergestellte Nockenwelle
FR2787357B1 (fr) * 1998-12-18 2001-03-16 Tubes Et Formes Procede et dispositif de realisation par hydroformage d'un piquage incline a partir d'un tube metallique
DE10065033C1 (de) * 2000-12-23 2002-07-11 Daimler Chrysler Ag Verfahren zur Herstellung eines umfänglich geschlossenen Hohlprofiles und eine Vorrichtung zur Durchführung desselben
EP2030701A1 (fr) 2007-08-25 2009-03-04 IFUTEC Ingenieurbüro für Umformtechnik GmbH Outil et procédé destinés à la fabrication d'un élément creux
CN102886427B (zh) * 2012-09-24 2014-10-22 重庆科技学院 汽车驱动桥整体复合胀形工艺
DE202017106654U1 (de) 2017-11-03 2018-01-11 Wvl-Werkzeug- Und Vorrichtungsbau Lichtenstein Gmbh Formbackensystem eines Innenhochdruck-Umformwerkzeuges

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH295158A (de) * 1950-09-18 1953-12-15 Ici Ltd Verfahren und Vorrichtung zur Herstellung von Rohrfittingen.
DE938606C (de) * 1950-09-18 1956-02-02 Ici Ltd Verfahren und Einrichtung zur Herstellung eines verzweigten Rohranschlusses
JPS6045013B2 (ja) * 1978-08-07 1985-10-07 株式会社日立製作所 管端部の真円矯正方法
DE2935086C2 (de) * 1979-08-28 1982-04-01 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zur Herstellung von abgesetzten Hohlkörpern stark unterschiedlicher Querschnittsformen
DE3906957A1 (de) * 1988-12-05 1990-09-06 Kuhn Rainer Verfahren zur herstellung von rohrartigen bauteilen

Also Published As

Publication number Publication date
EP0497438A1 (fr) 1992-08-05
DE59200269D1 (de) 1994-08-18
DE4201819A1 (de) 1992-07-30
ES2056688T3 (es) 1994-10-01

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