EP1848554B1 - Procede et dispositif pour realiser des pieces structurelles - Google Patents

Procede et dispositif pour realiser des pieces structurelles Download PDF

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Publication number
EP1848554B1
EP1848554B1 EP05794717A EP05794717A EP1848554B1 EP 1848554 B1 EP1848554 B1 EP 1848554B1 EP 05794717 A EP05794717 A EP 05794717A EP 05794717 A EP05794717 A EP 05794717A EP 1848554 B1 EP1848554 B1 EP 1848554B1
Authority
EP
European Patent Office
Prior art keywords
forming
preform
tool
component
support plunger
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.)
Active
Application number
EP05794717A
Other languages
German (de)
English (en)
Other versions
EP1848554A1 (fr
Inventor
Bernd Schulze
Peter Juraschek
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.)
Fischer Hydroforming Chemnitz & Co KG GmbH
Original Assignee
Tower Automotive Hydroforming & 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
Application filed by Tower Automotive Hydroforming & Co KG GmbH filed Critical Tower Automotive Hydroforming & Co KG GmbH
Publication of EP1848554A1 publication Critical patent/EP1848554A1/fr
Application granted granted Critical
Publication of EP1848554B1 publication Critical patent/EP1848554B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
    • B21C29/006—Gas treatment of work, e.g. to prevent oxidation or to create surface effects
    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles
    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00

Definitions

  • the invention relates to a method for the production of components according to the preamble of the first claim, wherein a component is produced in several forming stages, wherein a forming stage is a hydroforming, (see, eg GB-A-1 206 072 ).
  • DE 102 41 028 B3 describes a method for producing arcuate (rounded) structural components from an extruded profile, which, after emerging from the die of the extruder for the purpose of molding as an arcuate (rounded) profile of guide tools is fed and hot in one or more processing stations, wherein before hot forming, the working temperature of the workpiece is adjusted by cooling.
  • the hot forming can also be done as hydroforming.
  • a disadvantage of the aforementioned solutions is that after completion of hydroforming no further reshaping processing in the direction of the cavity of the workpiece is more and the forming capacity is limited in hydroforming. In particular, tight radii during hydroforming can not be reproduced. Corresponding components must be produced by machining or can not be produced in one piece.
  • the method of manufacturing a component is by use of a voided starting workpiece having a wall with an inner surface and an outer surface, the starting workpiece being formed in an hydroforming (IHU) tool by the action of a pressure of a pressure medium acting on the inner surface thereof a first forming operation in a by the hydroforming (IHU) tool certain preform is formed and then the preform in a second forming process in a forming tool by acting on the outer surface in the direction of the cavity of the preform forming process in the required shape of the component, which also has narrow radii, is reshaped.
  • IHU hydroforming
  • the second forming operation may be either a hot forming operation or a cold forming operation.
  • the second forming process preferably takes place in a tool by means of at least one tool element having a first mold surface and acting on the outer surface, the mold surface having the contour which is to be produced on the outer wall of the component.
  • a support punch in the preform which has at least one second mold surface against which acts the first mold surface of the tool element, so that the lying between the two mold surfaces wall portion of the preform is formed by the second forming operation in the final shape.
  • a hot forming operation is required, the entire preform or only partial areas where the second forming operation is to take place are heated to the hot working temperature. This can be done inside or outside the device, for example by means of inductive heating or by radiant heat. To avoid scaling, hot forming can be carried out under a protective gas atmosphere.
  • the device for producing a component from a cavity-provided starting workpiece which has a wall with an inner surface and an outer surface, consists of an hydroforming (hydroforming) tool, in which by the action of a pressure of a pressure medium acting on the inner surface of the starting part the initial part is converted into a preform determined by the hydroforming (hydroforming) tool in a first forming operation, wherein a forming tool is used in a subsequent station, into which the preform can be inserted, wherein the forming tool moves at least one towards the cavity and on the outer surface of the preform acting, first tool element having a first mold surface corresponding to the generated contour of the component to be produced.
  • an hydroforming (hydroforming) tool in which by the action of a pressure of a pressure medium acting on the inner surface of the starting part the initial part is converted into a preform determined by the hydroforming (hydroforming) tool in a first forming operation, wherein a forming tool is used in a subsequent station, into which the preform can be inserted
  • the tool advantageously has a support punch, which engages through an opening of the preform in the cavity. At least one second mold surface is formed on the support punch, against which the first mold surface of the tool is movable, so that the wall of the preform is deformable between the two mold surfaces.
  • the support punch can be axially divided into a first part (20a) and a second part (20b), wherein the first part and / or the second part in each case one may contain second mold surface.
  • One or both parts of the support punch may be independently movable into / out of the preform. It is also possible to arrange the support punch or a part of the support punch fixed to the frame on the tool, so that the preform is then pushed over to the desired position.
  • the first part and / or the second part of the support punch may be movable perpendicular to the axis of the support punch in the direction of the tool element and away therefrom.
  • a third part of the support punch may extend between the first part and the second part of the support punch.
  • the tool can be heated and be in a protective gas atmosphere.
  • the hot forming subsequent to the hydroforming it is possible to reshape the component in the regions (for example, to produce a bead) in which a strong solidification has been recorded by the preceding forming stages.
  • ECM machining By a final electrochemical machining (ECM machining), it is possible to significantly improve the surface of the component. The roughness of the surface is reduced and any existing burr removed. This reduces the friction to the friction partner and increases the life of the component.
  • Fig. 1a shows the cross section of a tubular starting workpiece 1A.
  • This pipe section acc. Fig. 1b in a first region 1.1 its initial diameter. In the middle of 1.2 the diameter was reduced and the adjoining area 1.3 was widened at its open end by hydroforming. The area 1.3 forms a kind of pot, which is followed by the reduced area 1.2.
  • the section AA acc. Fig. 1b is in Fig. 1c shown.
  • This in Fig. 1b and 1c illustrated preform 1V is placed in a tool 10 with the area 1.3, which was preformed by IHU.
  • the tool 10 has a lower mold half 10.1.
  • a tool element 11 is arranged, which has a first mold surface 12 corresponding to the component shape to be produced with a wave-shaped portion 12.1.
  • a support punch 20 is provided which is divided axially into a first punch half 20a and a second punch half 20b.
  • the first punch half 20a lies in the direction of the tool element 11 and has a second mold surface 21, which lies opposite the first mold surface 12 of the tool element 11 and is adapted thereto.
  • Fig. 2 shows the opened tool 10 with the inserted in the area 1.3 preform 1V and located therein punch halves 20a, 20b of the support punch 20 before the second forming process.
  • Fig. 5 shows the three-dimensional view of the open tool 10 after the second forming process with the therein component 1 B, without tool element 11.
  • area 1.3 pot area of the embossed axially extending shaft portion 30 and the undercut 31 can be seen. The operation of the tool is explained in summary below:
  • the preform 1 V is inserted into the tool 10 and is located at the end located on the 1.3 side of a transverse plate 10.2.
  • the first half of the stamp (not visible here) is fixed to the frame.
  • the preform 1 V is thus pushed over the first punch half to the stop on the transverse plate 10.2.
  • the second punch half 20b in the preform 1V and the tool member 11 performs a lifting movement in the direction of the lower tool 10.1, whereby the wall of the preform 1 V between the tool element 11 and punch 20 is transformed.
  • the second punch half 20b moves out of the component 1B and the tool element 11 upwards. Now, the manufactured component 1B can be removed from the frame-fixed first punch half 20a.
  • Fig. 6 the three-dimensional view of the component 1 B produced according to the invention is shown.
  • the component 1B is in this case a Rastierhülse for securing adjustment positions of a shift linkage for motor vehicles.
  • These Rast istshülsen have a pot area 1.3, followed by a cylindrical reduced area 1.2 connects.
  • an extended area 1.1 follows.
  • an axially extending shaft portion 30 was generated.
  • This shaft portion 30 forms a latching recess into which a detent ball, not shown, a ball catch can engage.
  • the pot region 1.3 has an undercut 31 for determining the selection plane and a link 32 is cut out, via which the determination of the individual gears of the gearshift takes place.
  • the backdrop 32 is opposite a recess 33rd
  • the locking sleeve is first formed in one piece and was made from a pipe section.
  • the one-piece and extremely simple production has the advantage that higher accuracies can be achieved than in the production of shaving sleeves, which are composed of several individual parts. Furthermore, a near contour production is possible, which can be supplemented if necessary by a final mechanical processing.
  • the second forming operation is carried out by hot forming, it is possible to influence the structure in a targeted manner and thus to carry out a hardening to increase the strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Catalysts (AREA)

Claims (16)

  1. Procédé pour la fabrication d'un élément (1B) en utilisant une pièce initiale (1A) dotée d'une cavité (2), qui présente une paroi (3) avec une surface intérieure (4) et une surface extérieure (5), dans lequel la pièce initiale (1A) est mise en forme dans un outil de formage sous haute pression interne (HPI) dans une première opération de formage donnant une ébauche (1V) et l'ébauche (1V) est ensuite mise en forme dans une deuxième opération de formage dans un outil de formage (10) par un procédé de formage agissant sur la surface extérieure (5) en direction de la cavité (2) de l'ébauche (1V) pour obtenir la forme spécifiée de l'élément (1B), caractérisé en ce que pendant la deuxième opération de formage, un poinçon de soutien (20) se met en prise dans l'ébauche (1V).
  2. Procédé selon la revendication 1, caractérisé en ce qu'avant et après le formage HPI, le diamètre ou la section de pièce initiale (1A) ou de l'ébauche (1V) est réduit par zones.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la deuxième opération de formage est une opération de formage à chaud ou une opération de formage à froid.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la deuxième opération de formage a lieu dans un outil (10) au moyen d'au moins un élément d'outil (11) présentant une première surface de moule (12) et agissant sur la surface extérieure (5).
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce qu'en vue du formage à chaud, toute l'ébauche (1V) est chauffée, ou en ce que seules des zones partielles dans lesquelles la deuxième opération de formage doit avoir lieu sont chauffées à la température de formage à chaud.
  6. Procédé selon l'une des revendications 3 à 5, caractérisé en ce que le chauffage à la température de formage à chaud est réalisé par chauffage par induction ou par de la chaleur rayonnée.
  7. Procédé selon l'une des revendications 3 à 6, caractérisé en ce que le formage à chaud a lieu sous une atmosphère de gaz prosecteur
  8. Procédé selon l'une des revendications 3 à 7, caractérisé en ce que la température lors du formage à chaud et le type et la vitesse du refroidissement à température ambiante permettent d'obtenir une structure finale définie.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la surface de l'élément (1 B) est ensuite usinée par usinage électrochimique.
  10. Dispositif pour la fabrication d'un élément (1B) selon la revendication 1 à partir d'une pièce initiale (1A) munie d'une cavité (2), qui possède une paroi (3) avec une surface intérieure (4) et une surface extérieure (5), qui est mise en forme dans un outil de formage sous haute pression intérieure (HPI) pour obtenir une ébauche (1V), dans lequel, dans un poste suivant, un outil de formage dans lequel l'ébauche (1V) peut être introduite est utilisé, dans lequel l'outil de formage (10) présente au moins un premier élément d'outil (11) déplaçable en direction de la cavité et agissant sur la surface extérieure (5) de l'ébauche (1V), qui présente une première surface de moule (12) correspondant au contour à produire de l'élément (1B) à fabriquer, caractérisé en ce que l'outil (10) présente un poinçon de soutien (20) qui peut se mettre en prise à travers une ouverture (6) de l'ébauche (1V) dans la cavité (2) de celle-ci et qui présente au moins une deuxième surface de moule (21) vers laquelle la première surface de moule (11) peut être déplacée de telle manière que la paroi (2) de l'ébauche (1V) peut être mise en forme entre les deux surfaces de moule (11, 21).
  11. Dispositif selon la revendication 10, caractérisé en ce que le poinçon de soutien (20) est partagé dans le sens axial au moins en une première partie (20a) et une deuxième partie (20b) et en ce que la première partie (20a) et/ou la deuxième partie (20b) contiennent une deuxième surface de moule (21).
  12. Dispositif selon la revendication 11, caractérisé en ce que les deux parties (20a, 20b) du poinçon de soutien (20) sont mobiles indépendamment l'une de l'autre pour entrer dans l'ébauche (1V) et en sortir.
  13. Dispositif selon la revendication 12, caractérisé en ce que la première partie (20a) et/ou la deuxième partie (20b) du poinçon de soutien (20) sont mobiles perpendiculairement à l'axe (A) du poinçon de soutien (20) en direction de l'élément d'outil (11) et à l'opposé de celui-ci.
  14. Dispositif selon l'une des revendications 10 à 13, caractérisé en ce qu'une troisième partie (20c) du poinçon de soutien (20) s'étend entre la première partie (20a) et la deuxième partie (20b) du poinçon de soutien (20).
  15. Dispositif selon l'une des revendications 10 à 14, caractérisé en ce que l'outil (10) peut être chauffé.
  16. Dispositif selon l'une des revendications 10 à 15, caractérisé en ce qu'un poste d'usinage électrochimique de la surface de l'élément est prévu ensuite.
EP05794717A 2005-02-19 2005-09-22 Procede et dispositif pour realiser des pieces structurelles Active EP1848554B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005007997A DE102005007997B3 (de) 2005-02-19 2005-02-19 Verfahren und Einrichtung zur Herstellung von Bauteilen
PCT/DE2005/001670 WO2006086935A1 (fr) 2005-02-19 2005-09-22 Procede et dispositif pour realiser des pieces structurelles

Publications (2)

Publication Number Publication Date
EP1848554A1 EP1848554A1 (fr) 2007-10-31
EP1848554B1 true EP1848554B1 (fr) 2009-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05794717A Active EP1848554B1 (fr) 2005-02-19 2005-09-22 Procede et dispositif pour realiser des pieces structurelles

Country Status (5)

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EP (1) EP1848554B1 (fr)
AT (1) ATE433810T1 (fr)
DE (2) DE102005007997B3 (fr)
ES (1) ES2328834T3 (fr)
WO (1) WO2006086935A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016107950A1 (de) * 2016-04-28 2017-11-02 Schuler Pressen Gmbh Verfahren zum Fertigen eines hohlen Bauteils, Bauteil und Presse zum Fertigen eines hohlen Bauteils

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007034938A1 (de) * 2007-07-24 2009-01-29 Hebö Maschinenfabrik GmbH Verfahren und Vorrichtung zur Herstellung eines rohrförmigen Hohlprofils mit variierender Wanddicke
DE102007039662B4 (de) * 2007-08-22 2014-12-04 Rheinmetall Waffe Munition Gmbh Treibladungsanzünder
EP2151651B1 (fr) * 2008-08-07 2011-01-19 Giannoni S.p.a. Echangeur thermique a double flux et son procédé de fabrication
DE102008049245A1 (de) * 2008-09-26 2010-04-01 F.W. Brökelmann Aluminiumwerk GmbH & Co. KG Verfahren zur Umformung von Hohlprofilen
DE102014210357B4 (de) 2014-06-02 2020-12-17 Schaeffler Technologies AG & Co. KG Rastierhülse für eine Schaltwelle sowie Schaltanordnung mit der Schaltwelle und der Rastierhülse

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Publication number Priority date Publication date Assignee Title
GB1206072A (en) * 1969-02-21 1970-09-23 Masanobu Nakamura Method of manufacturing rear axle casings for automobiles
JPS6270030A (ja) * 1985-09-24 1987-03-31 Orimupitsuku:Kk 竿杆の成形方法
DE19708905C2 (de) * 1997-03-05 2002-06-27 Daimler Chrysler Ag Verfahren zum Herstellen von Karosserieträgern
US5992197A (en) * 1997-03-28 1999-11-30 The Budd Company Forming technique using discrete heating zones
DE10042465C2 (de) * 2000-08-29 2002-08-01 Vaw Ver Aluminium Werke Ag Verfahren zum Verformen von rohrförmigen Hohlkörpern aus Metall
JP4748861B2 (ja) * 2001-01-19 2011-08-17 本田技研工業株式会社 バルジ成形方法
DE10120063C2 (de) * 2001-04-24 2003-03-27 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung von metallischen Profilbauteilen für Kraftfahrzeuge
JP2003126923A (ja) * 2001-10-24 2003-05-08 Honda Motor Co Ltd 管状部材の成形方法
DE10241028B3 (de) * 2002-09-05 2004-07-29 Erbslöh Ag Verfahren zur Herstellung von bogenförmigen (gerundeten) Strukturbauteilen aus einem Strangpreßprofil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016107950A1 (de) * 2016-04-28 2017-11-02 Schuler Pressen Gmbh Verfahren zum Fertigen eines hohlen Bauteils, Bauteil und Presse zum Fertigen eines hohlen Bauteils
WO2017186219A1 (fr) 2016-04-28 2017-11-02 Schuler Pressen Gmbh Procédé de fabrication d'un élément creux, élément et presse de fabrication d'un élément creux
DE102016107950B4 (de) * 2016-04-28 2018-02-01 Schuler Pressen Gmbh Verfahren zum Fertigen eines hohlen Bauteils und Bauteil

Also Published As

Publication number Publication date
DE102005007997B3 (de) 2005-12-08
ATE433810T1 (de) 2009-07-15
DE502005007540D1 (de) 2009-07-30
WO2006086935A1 (fr) 2006-08-24
EP1848554A1 (fr) 2007-10-31
ES2328834T3 (es) 2009-11-18

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