EP0879657B1 - Procédé et dispositif de fabrication d'un corps creux - Google Patents

Procédé et dispositif de fabrication d'un corps creux Download PDF

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Publication number
EP0879657B1
EP0879657B1 EP98108298A EP98108298A EP0879657B1 EP 0879657 B1 EP0879657 B1 EP 0879657B1 EP 98108298 A EP98108298 A EP 98108298A EP 98108298 A EP98108298 A EP 98108298A EP 0879657 B1 EP0879657 B1 EP 0879657B1
Authority
EP
European Patent Office
Prior art keywords
tool
blanks
edge
hollow body
blank
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
EP98108298A
Other languages
German (de)
English (en)
Other versions
EP0879657A3 (fr
EP0879657A2 (fr
Inventor
Michael Seifert
Thomas; Dr. Werle
Dr. Bernd Schulze
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.)
Dr Meleghy Hydroforming GmbH and Co KG
Meleghy Hydroforming GmbH and Co KG
Original Assignee
Dr Meleghy Hydroforming GmbH and Co KG
Meleghy Hydroforming GmbH and Co KG
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 Dr Meleghy Hydroforming GmbH and Co KG, Meleghy Hydroforming GmbH and Co KG filed Critical Dr Meleghy Hydroforming GmbH and Co KG
Publication of EP0879657A2 publication Critical patent/EP0879657A2/fr
Publication of EP0879657A3 publication Critical patent/EP0879657A3/fr
Application granted granted Critical
Publication of EP0879657B1 publication Critical patent/EP0879657B1/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
    • B21D26/023—Deforming sheet bodies including an additional treatment performed by fluid pressure, e.g. perforating
    • 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
    • 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
    • B21D26/029—Closing or sealing means
    • 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
    • B21D26/053—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 characterised by the material of the blanks
    • B21D26/059—Layered blanks
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49924—Joining by deforming of parallel side-by-side elongated members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble

Definitions

  • the invention relates to a method and a device for producing a hollow body, preferably from Sheet metal, such as an automobile hood, door or Like., In which the so-called hydroforming (IHU) process is used, according to the preamble of Claims 1 and 26.
  • IHU hydroforming
  • German patent application 42 32 161 describes a process for producing a hollow body under Use of a basic body made of circuit boards, in which the hollow body by a combined application of the IHU and deep drawing processes becomes.
  • This proposal is characterized in that first the base body from two identical edge dimensions having printed circuit boards is produced, the one another placed and welded together at the edge become. After inserting the base body into a mold and the closing of the base body takes place by means of the above-mentioned process to a hollow body. After the forming process has been completed, more will follow Processing steps.
  • the object of the invention based on a method for producing a hollow body in view of the constantly increasing time and cost pressure, especially in the automotive industry, more efficiently and thus more cost-effective and more flexible.
  • the method is suitable especially for the production of multi-walled components, which are particularly suitable for body construction, such as automobile hoods and doors, tailgates and roofs, and can advantageously be in only one Tool.
  • the boards in Connection area preferably in the folded corner area plastically pressed, resulting in a more reliable seal leads.
  • the special IHU tool at least one further processing step during, overlapping and / or after the IHU process carried out.
  • processing steps include, for example, punching, punching, sealing the at least prepared attachment of Fasteners and the like.
  • FIG. 1 is a special, known per se, for carrying out the invention Appropriate process.
  • Hydroforming (IHU) tool 1 namely a hydroforming (IHB) tool with a Ram 2 and a press table 3 shown.
  • the plunger 2 is in accordance with Arrow A can be moved vertically up and down.
  • the Ram 2 is a tool upper part 4.
  • Tool upper 4 and Lower tool part 5 form when IHB tool 1 is closed Hollow body negative form, i.e. the boundary surface against which the hollow body to be produced is pressed by the hydroforming process, and which gives it its final, repeatable shape. It is conceivable to this negative form by moving counter pressure parts To design variable shape of the hollow body to be produced.
  • a pressure medium supply is also in the IHB tool 1 6 integrated in the manner of a docking system, too a lance 7 and a connection 8 with one not shown pressure medium memory belongs.
  • the docking system 6 is in this embodiment in the lower tool part 5 installed that his lance 7 towards of the hollow body 9 to be produced is movable and a constant supply of pressure medium through the connection 8 is guaranteed.
  • the docking system 6 could also between Tool upper part 4 and lower part 5 arranged the medium feed from the side in the hollow body 9 would take place.
  • the starting sheet metal boards - at one Automotive hood can be the outer skin board 12 and one Inner skeleton board 13 - on a coil system cut and if possible the front sides - Based on the automobile hood to be manufactured -
  • the outer skin boards 12 at an angle greater than 90 ° angled. The reason for bending at an angle greater than 90 ° is explained below. Should this Bending process cannot be integrated into the coil tool be a bevel after cutting in one Preforming tool possible.
  • the ones to be connected Boards 12, 13 can be inserted into the IHB tool 1 with adhesive strips on the inside of the outer skin board 12 pre-fixed on the bevelled end faces become. These adhesive strips have in addition to the pre-fixing Effect the task of sealing the boards against each other as well as absorb vibrations and corrosion to avoid between the boards.
  • the lance 7 is designed such that during the forming no pressure medium can escape from the hollow body. This is done, for example, with a conical lance end reached.
  • These processing steps include enforcement of the flanks 14 for connecting the boards 12, 13 by means of individual stamps 18 which can be moved horizontally Ledge stamp 16 stored and relative to these are also horizontally movable and for example Hole operations in the outer skin board 12 and / or in the inner frame board 13 and the insertion larger openings in the inner frame board 13, the functions of which were explained above.
  • Punching can be done in different process variants be performed. For example, here are punching "inside”, punching “outside” and punching "with slugs remaining on the component”.
  • the punching or cutting tool moves with its punch end 19 during or too after hydroforming (s) into high pressure acted upon hollow body, remains during the forming there and thereby prevents the Print media.
  • the punched slugs then remain in the hollow body.
  • Punching "outwards” takes place in two steps.
  • the hole or cutting tool moves in a first step 19 during the IHU process against the hollow body and penetrates so far into its wall that a predetermined breaking line arises; in the second step the tool 19 at high speed with maximum internal high pressure suddenly pulled back.
  • 3 to 7 is an inventive Embodiment of a particularly suitable Device shown that in its essential structure previously described, but by changing some Details brings special advantages, namely on the one hand optimized sealing at the connection areas of the boards and on the other hand, a simplified, in contrast to the previously described Embodiment stationary docking system.
  • a Sealing edge made in the corner of the edge is, namely at the transition from the so-called “Frame” (this is the angled one in the drawings sheet metal or board edge area running vertically downwards) to the actual hollow body (here bonnet).
  • This eliminates the need to bend or fold the boards before inserting them into the IHU tool Generate the side flanks 14 - rather this area accordingly during the closing of the tool deformed - as well as the stamps 15, 16 and 18, which is a considerable Saving in construction costs means and the tool both in terms of its construction and also its additional controls essential simplified.
  • Corner weld like the one shown in Fig. 6 Force directions show from above or below and is not reached from the side, is denser and to manufacture more precisely because otherwise a relative large area to be sealed. It can also be used Adhesive strips for fixing the relative position and / or additional Seals are dispensed with.
  • the depressions 26a adapted head (27a) in screwed the socket 26 so that the inner board 13 in the hole area as shown in Fig. 7 funnel-shaped in adaptation to the conical head 27a and deformed to the depression 26a.
  • FIG. 5 shows the arrangement of two such docking points, where docking point B is venting and the docking point C filling with one of the media mentioned the one that forms between the two boards Void serves in this area, as in FIG. 6 represented by the distance between the boards given is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Body Structure For Vehicles (AREA)

Claims (35)

  1. Procédé pour fabriquer un corps creux, tel qu'un capot de véhicule automobile, une porte ou analogue, selon lequel
    au moins deux flans de préférence en tôle sont étroitement maintenus l'un contre l'autre le long d'une ligne au moins presque entièrement fermée,
    le corps creux est mis en forme par le procédé de formage par pression interne
    caractérisé en ce qu'après la mise en forme, les flans maintenus l'un contre l'autre sont assemblés par rivetage ou imbrication.
  2. Procédé selon la revendication 1, caractérisé en ce que les flans sont maintenus étroitement l'un contre l'autre dans leurs zones de bord et sont assemblés par rivetage ou imbrication dans la zone de leurs côtés extérieurs.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'assemblage par rivetage ou imbrication est effectué avant, pendant et/ou après le formage par pression interne.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que, pendant le formage par pression interne, au moins une autre opération de transformation est exécutée.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les autres opérations de transformation sont réalisées simultanément, pendant, avant et/ou après le procédé de formage par pression interne.
  6. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les flans sont coudés ou pliés avant d'être mis en place dans l'outil de formage par pression interne.
  7. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que les flans sont coudés ou pliés dans l'outil de formage par pression interne.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que les flans sont fixés et/ou étanchés dans leur position relative au moyen de bandes adhésives.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que les flans sont bordelés dans l'outil de formage par pression interne.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que les flans sont soudés à froid dans l'outil de formage par pression interne.
  11. Procédé selon l'une des revendications 1 à 5 et 7 à 10, caractérisé en ce que les flans sont comprimés de façon plastique dans les angles de leurs rebords.
  12. Procédé selon l'une des revendications 1 à 11, caractérisé en ce que l'on utilise en tant que produit de départ des flans de différentes épaisseurs, finitions de surfaces et/ou sortes de matériaux.
  13. Procédé selon l'une des revendications 1 à 12, caractérisé en ce que les corps creux sont fabriqués à partir d'un flan constituant la surface extérieure et d'un flan constituant l'ossature intérieure.
  14. Procédé selon l'une des revendications 1 à 13, caractérisé en ce que la haute pression interne est créée par un fluide.
  15. Procédé selon l'une des revendications 1 à 13, caractérisé en ce que la haute pression interne est créée par un gaz.
  16. Procédé selon l'une des revendications 1 à 13, caractérisé en ce que la haute pression interne est créée par une mousse.
  17. Procédé selon l'une des revendications 1 à 16, caractérisé en ce que l'agent de formage est introduit dans le corps creux au moyen d'au moins une arrivée d'agent sous pression se présentant sous la forme d'un système de raccordement muni d'au moins une lance, un mandrin ou analogues.
  18. Procédé selon la revendication 17, caractérisé en ce que les lances ou analogues du système de raccordement sont poussées de l'extérieur à travers au moins un flan, de préférence à travers le flan constituant l'ossature intérieure.
  19. Procédé selon l'une des revendications 1 à 17, caractérisé en ce que l'agent de formage est introduit dans le corps creux à l'aide d'un système de raccordement fixe.
  20. Procédé selon la revendication 19, caractérisé en ce qu'avant le placement d'autres flans dans l'outil avant sa fermeture, le système de raccordement est relié au flan qui y a été placé en premier lieu, de préférence au flan intérieur.
  21. Procédé selon l'une des revendications 1 à 20, caractérisé en ce que pendant le formage par pression interne se déroulent dans un seul et même outil des opérations de fabrication supplémentaires commandées dans le temps et dans l'espace, telles que le bordelage, le poinçonnage, la compression des brides, le pliage, le pré-estampage et/ou le prédécoupage.
  22. Procédé selon la revendication 21, caractérisé en ce que le poinçonnage s'effectue "vers l'extérieur".
  23. Procédé selon la revendication 21, caractérisé en ce que le poinçonnage s'effectue "vers l'intérieur".
  24. Procédé selon la revendication 21, caractérisé en ce que le poinçonnage s'effectue "avec la pastille demeurant sur la pièce".
  25. Procédé selon l'une des revendications 1 à 24, caractérisé par une mise en forme du corps creux contre une limite fixe et/ou des éléments de contre-pression mobiles.
  26. Dispositif pour fabriquer des corps creux, de préférence des pièces constituées de flans, qui présente une partie supérieure d'outil (4) reliée à un poinçon (2) pouvant monter et descendre, et une partie inférieure d'outil (5) fixée sur une table de presse (3), renfermant des outils supplémentaires intégrés et équipés d'un système de raccordement (6) pour amener l'agent sous pression, caractérisé par une partie inférieure d'outil au moins en deux parties, que la partie supérieure d'outil (4) vient recouvrir, latéralement, et qui est composée d'une matrice d'emboutissage (22) et d'un poinçon d'emboutissage (21) guidé dans cette dernière.
  27. Dispositif selon la revendication 26, caractérisé par un collet (22a) de la matrice d'emboutissage (22), qui est dirigé vers la partie supérieure d'outil (4).
  28. Dispositif selon la revendication 27, caractérisé par au moins un point de raccordement (C) dans le collet (22a) de la matrice d'emboutissage fixe (22).
  29. Dispositif selon la revendication 28, caractérisé par au moins un point de raccordement de ventilation (B) et au moins un point de raccordement de remplissage (C).
  30. Dispositif selon l'une des revendications 26 à 29, caractérisé par une douille (26) montée dans le collet (22a) de manière à faire ressort, qui possède un taraudage destiné à recevoir une vis creuse (27) dont la tête (27a) s'élargit de façon conique, cette forme correspondant à un évidement conique (26a) dans la douille (26).
  31. Dispositif selon la revendication 30, caractérisé par une arête d'estampage (28) créée par la pression interne au niveau de la transition frontale entre la douille (26) et le collet (22a) de la matrice d'emboutissage, qui agit telle une arête de cisaillement sur le flan (13) qui y repose.
  32. Dispositif selon l'une des revendications 26 à 31, caractérisé par au moins un poinçon (15) pouvant monter et descendre pour couder ou plier dans la partie supérieure d'outil (4).
  33. Dispositif selon la revendication 32, caractérisé par au moins un poinçon de compression (16) dans la partie inférieure d'outil (5), qui est mobile horizontalement et qui s'étend sur toute la longueur de l'arête du flan.
  34. Dispositif selon la revendication 32 ou 33, caractérisé par des poinçons (18) pour riveter.
  35. Dispositif selon la revendication 34, caractérisé en ce que les poinçons d'assemblage (18) sont montés dans le ou les poinçon(s) de compression (16) et sont mobiles par rapport à ces derniers.
EP98108298A 1997-05-12 1998-05-07 Procédé et dispositif de fabrication d'un corps creux Expired - Lifetime EP0879657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19719426A DE19719426B4 (de) 1997-05-12 1997-05-12 Verfahren und Vorrichtung zum Herstellen eines Hohlkörpers
DE19719426 1997-05-12

Publications (3)

Publication Number Publication Date
EP0879657A2 EP0879657A2 (fr) 1998-11-25
EP0879657A3 EP0879657A3 (fr) 1998-12-02
EP0879657B1 true EP0879657B1 (fr) 2004-07-21

Family

ID=7828981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98108298A Expired - Lifetime EP0879657B1 (fr) 1997-05-12 1998-05-07 Procédé et dispositif de fabrication d'un corps creux

Country Status (9)

Country Link
US (2) US6418607B1 (fr)
EP (1) EP0879657B1 (fr)
AT (1) ATE271431T1 (fr)
BR (1) BR9806574A (fr)
CA (1) CA2237350A1 (fr)
CZ (1) CZ294559B6 (fr)
DE (2) DE19719426B4 (fr)
ES (1) ES2224309T3 (fr)
PL (1) PL187132B1 (fr)

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US4301584A (en) * 1980-01-31 1981-11-24 United Technologies Corporation Method of forming fiber and metal matrix composite
DE3709181A1 (de) * 1987-03-20 1988-09-29 Asea Ab Verfahren zur herstellung von komplizierten blechteilen und werkzeug fuer die druckumformung solcher blechteile
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005055452A1 (de) * 2005-11-21 2007-05-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zum Hochdruckumformen
DE102005055452B4 (de) * 2005-11-21 2008-09-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zum Hochdruckumformen

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US6418607B1 (en) 2002-07-16
CZ144398A3 (cs) 1999-08-11
PL187132B1 (pl) 2004-05-31
DE19719426B4 (de) 2005-06-16
ES2224309T3 (es) 2005-03-01
CZ294559B6 (cs) 2005-02-16
US6820449B2 (en) 2004-11-23
EP0879657A3 (fr) 1998-12-02
EP0879657A2 (fr) 1998-11-25
PL326264A1 (en) 1998-11-23
US20020042980A1 (en) 2002-04-18
ATE271431T1 (de) 2004-08-15
DE19719426A1 (de) 1998-11-19
DE59811682D1 (de) 2004-08-26
BR9806574A (pt) 2000-02-22
CA2237350A1 (fr) 1998-11-12

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