EP1321201B1 - Méthode de fabrication par hydroformage - Google Patents

Méthode de fabrication par hydroformage Download PDF

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Publication number
EP1321201B1
EP1321201B1 EP02024793A EP02024793A EP1321201B1 EP 1321201 B1 EP1321201 B1 EP 1321201B1 EP 02024793 A EP02024793 A EP 02024793A EP 02024793 A EP02024793 A EP 02024793A EP 1321201 B1 EP1321201 B1 EP 1321201B1
Authority
EP
European Patent Office
Prior art keywords
component
insertion element
nut
punching
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
EP02024793A
Other languages
German (de)
English (en)
Other versions
EP1321201A3 (fr
EP1321201A2 (fr
Inventor
Walter-Josef Schiffler
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1321201A2 publication Critical patent/EP1321201A2/fr
Publication of EP1321201A3 publication Critical patent/EP1321201A3/fr
Application granted granted Critical
Publication of EP1321201B1 publication Critical patent/EP1321201B1/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
    • B21D26/033—Deforming tubular bodies
    • B21D26/035—Deforming tubular 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/034—Joining superposed plates by piercing

Definitions

  • the present invention relates to a manufacturing method according to the preamble of claim 1 (see US-A 6 134 767).
  • Components manufactured by internal high pressure forming are versatile, especially in the automotive sector.
  • the windscreen crossmember and the A-pillars "Internal high pressure forming components” manufactured.
  • On these hydroforming components must now again fasteners to connect with other components may be provided.
  • the connection with other components is made so far usually by welding and screwing techniques.
  • Threaded screw technology are done in a separate step "Threaded inserts" inserted into the internal high-pressure formed components or bolts welded onto the hydroforming components.
  • Threaded screw technology are done in a separate step "Threaded inserts" inserted into the internal high-pressure formed components or bolts welded onto the hydroforming components.
  • the object of the invention is to provide a manufacturing process with the whole general "connecting elements" in a simple manner on hydroforming components are attachable.
  • the basic principle of the invention is immediately after the manufacture of the Internal high pressure forming component, i.e. in the hydroforming tool Connection or fastening element in the hydroforming component punch in and then the connecting or fastening element deform that it is form-fitting with the hydroforming component connected is.
  • connection or fastening element is expressed in simplified terms as "Punching tool” for punching a through opening in the wall of the Internal high pressure forming component used. Then the connection or fastening element plastically deformed similar to a blind rivet and thereby firmly connected to the hydroforming component. Since the connection or Fastener acts as a "punching tool” when “setting”, it points preferably a higher strength than the material of the réellehoch horrumformbauteils.
  • the fastening element can, for example, be a cup nut with an internal thread his. Similar to a blind rivet, a mandrel can be provided, which in the Bottom of the pot nut is screwed. After "punching" the pot nut in the wall of the hydroforming component is the cup nut by means of a pressed together on the mandrel and on an edge of the pot nut. The pot nut deforms and "flows" in the radial direction, which creates a positive connection with the hydroforming component results. After reaching a predetermined tensile force or specified mandrel length is removed, i.e. unscrewed.
  • the fastening element can also be deformed in a different way be positively connected to the hydroforming component.
  • Essential is mainly that the fastener as a "punching tool" acts and with still in the hydroforming tool Internal high pressure forming component is punched.
  • the fastening element which can also be referred to as an insert element, in a side view is asymmetrical.
  • asymmetrical means that the fastening or insert element in an end peripheral region has phase-like bevel.
  • the phased bevel has the purpose that when “pressing” or punching the fastener into the Wall of the internal high-pressure formed component of the "punching slugs" "inwards” is bent and does not tear off.
  • the punching slug thus remains on Internal high. So it is not punched out.
  • For hollow components it is often difficult to get loose punch slugs out of the cavity find out. Vehicle components in particular are loose in the cavity punching slugs located are not acceptable for noise or safety reasons.
  • the fastener or insert element has on the "set side", i.e. a circumferential projecting on the outside of the hydroforming component Edge on.
  • the fastener or insert is then so far in stamped the wall of the hydroforming component that the protruding Edge abuts the outer wall of the hydroforming component.
  • a major advantage of the invention is that in a single "integrated" process step thread inserts or threaded bolts for medium and heavy screw connections in the Internal high pressure forming component can be introduced. Since that Internal high pressure forming component when setting the thread inserts or Threaded bolt remains in the hydroforming tool is a very accurate Positioning the thread inserts and threaded bolts and thus a very Process-safe fastening suitable for large series production possible. in the Difference from the prior art, where "connecting elements" outside the High pressure forming tool set in a separate operation " , the hydroforming component does not need to be clamped again and be positioned because it is in the assembly of the "connecting elements" in the Internal high pressure forming tool remains.
  • FIGS. 1 - 6 show the individual in a highly simplified schematic representation "Phases” when setting a "connecting element", here one Threaded pot nut is.
  • a component blank e.g. a pipe blank between two Tool halves 1, 2 of an internal high pressure forming tool inserted. Then the two ends (not shown) of the component blank locked. A pressure medium is then in an interior of the component blank brought in. By pressurizing the interior of the component, what happens here Arrow 3 is indicated, the component blank is deformed and comes into contact with the Inner contour of the hydroforming tool, which is in the Figures 1 to 6 schematically indicated internal high pressure forming component 4 results.
  • the fastener is a cup nut with an internal thread.
  • a phase-like bevel 7 is provided at that Internal high-pressure forming component 4 facing the end face of the pot nut, i.e. in the Area of the bottom of the pot nut.
  • the pot nut 6 is therefore asymmetrical in a side view.
  • the pot nut 6 has a circumferential projecting Edge 8 on. Furthermore, a so-called pull mandrel 9 is provided, which is extends into the interior of the pot nut 6.
  • the pot nut 6 is with one end face on the outside of the Wall of the hydroforming component 4.
  • the pot nut 6 by a punching mechanism, not shown here, which is also integrated in the hydroforming tool 2 can be punched into the wall of the hydroforming component 4, which in Figures 2-6 is shown.
  • the wall of the hydroforming component 4 is punched through the end face 10 of the pot nut, but not circulating. Because of the bevel 7 provided on the pot nut 6 is namely ensures that a resulting punching slug 11 is bent inwards and is not punched out. The punching slug 11 thus remains on Internal high pressure forming component 4.
  • the pot nut 6 is so far in the Wall punched in the hydroforming component 4 that the peripheral edge 8 on the outside of the wall of the Inner high pressure forming component 4 is present.
  • the cup nut 6 is plastically deformed in the last step. Similar to a blind rivet, the dome 9 is pulled outwards. With a counterholder, not shown here, is placed on the edge 8 of the pot nut 6 applied a counterforce. The bottom of the pot nut 6 thus becomes the inside the wall of the hydroforming component 4 pulled. The pot nut 6 deforms plastically, the edge region of the pot nut 6 radially flows outside. This creates a bead 12 on the inside of the wall of the Inner high pressure forming component 4 is present. The pot nut 6 is now form-fitting and permanently connected to the hydroforming component 4. After reaching A predetermined tensile force or tensile length can pull mandrel 9 from the pot nut 6 can be removed.
  • the pot nut 6 can now be used as a fastening element for screwing on others Components to the hydroforming component 4 are used.
  • a nut can also be used a continuous internal thread can be provided, in which the mandrel for Put the nut is screwed.
  • an insert element could be used in which the mandrel follows the "setting" remains on the insert element.
  • the mandrel can be, for example Have external thread, on which another component is then screwed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (10)

  1. Procédé de fabrication comprenant les étapes suivantes :
    a) mise en place d'une ébauche de pièce entre des parties d'outils appartenant à un outil de déformation par haute pression intérieure,
    b) fermeture de l'outil de déformation par haute pression intérieure,
    c) déformation de l'ébauche de pièce au moyen d'un milieu sous pression pour former une pièce de déformation par haute pression intérieure,
    d) découpage d'une ouverture traversante dans une paroi de la pièce de déformation par haute pression intérieure, la pièce de déformation par haute pression intérieure restant alors dans l'outil de déformation par haute pression intérieure et le travail de découpage s'effectuant au moyen d'un évidement qui est prévu dans l'outil de déformation par haute pression intérieure, l'ouverture traversante étant découpée au moyen d'un élément d'insertion (6) qui reste dans l'ouverture traversante après le découpage,
    caractérisé en ce que
    l'élément d'insertion (6) qui reste dans l'ouverture de découpage subit une déformation plastique et est assemblé par ce moyen à la pièce de déformation par haute pression intérieure (4) par une liaison par forme.
  2. Procédé de fabrication selon la revendication 1,
    caractérisé en ce que
    l'élément d'insertion (6) est asymétrique en vue de côté, à savoir que sur un côté frontal de l'élément d'insertion (6), est prévue une surface inclinée (7) en forme de chanfrein.
  3. Procédé de fabrication selon une des revendications 1 ou 2,
    caractérisé en ce que
    l'élément d'insertion (6) présente un bord saillant périphérique (8) et l'élément d'insertion (6) est enfoncé dans l'ouverture traversante après le découpage suffisamment loin pour que le bord (8) s'appuie contre un côté extérieur de la pièce de déformation par haute pression intérieure (4).
  4. Procédé de fabrication selon une des revendications 1 à 3,
    caractérisé en ce que
    l'élément d'insertion (6) présente un mandrin de traction (9) prévu pour exécuter la déformation plastique de l'élément d'insertion (6).
  5. Procédé de fabrication selon une des revendications 1 à 4,
    caractérisé en ce que
    la matière de l'élément d'insertion (6) possède une résistance mécanique supérieure à celle de la matière de la pièce de déformation par haute pression intérieure (4).
  6. Procédé de fabrication selon une des revendications 1 à 5,
    caractérisé en ce que
    l'élément d'insertion (6) est un écrou borgne.
  7. Procédé de fabrication selon la revendication 6,
    caractérisé en ce que
    les mandrins de traction (9) se prolongent dans l'intérieur de l'écrou borgne.
  8. Procédé de fabrication selon la revendication 7.
    caractérisé en ce que
    le mandrin de traction (9) est vissé dans le fond de l'écrou borgne.
  9. Procédé de fabrication selon une des revendications 1 à 5,
    caractérisé en ce que
    l'élément d'insertion (6) est un écrou possédant un filetage intérieur traversant, dans lequel le mandrin de traction (9) est vissé de façon séparable.
  10. Procédé de fabrication selon une des revendications 1 à 5,
    caractérisé en ce qu'
    à l'élément d'insertion (6), est relié de façon inséparable un mandrin de traction (9) qui présente un filetage extérieur.
EP02024793A 2001-12-19 2002-11-07 Méthode de fabrication par hydroformage Expired - Lifetime EP1321201B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10162393A DE10162393A1 (de) 2001-12-19 2001-12-19 Fertigungsverfahren
DE10162393 2001-12-19

Publications (3)

Publication Number Publication Date
EP1321201A2 EP1321201A2 (fr) 2003-06-25
EP1321201A3 EP1321201A3 (fr) 2003-08-13
EP1321201B1 true EP1321201B1 (fr) 2004-08-11

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Application Number Title Priority Date Filing Date
EP02024793A Expired - Lifetime EP1321201B1 (fr) 2001-12-19 2002-11-07 Méthode de fabrication par hydroformage

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EP (1) EP1321201B1 (fr)
DE (2) DE10162393A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9067252B2 (en) 2013-10-30 2015-06-30 Caterpillar Inc. System and method of forming hole in blank during hydroforming process
DE102016005033B3 (de) * 2016-04-23 2017-10-12 Icm - Institut Chemnitzer Maschinen- Und Anlagenbau E.V. Vorrichtung zur Herstellung einer rohrförmigen Verteileranordnung mit Abzweigen im Wandbereich zwischen den Enden des Rohres sowie rohrförmige Verteileranordnung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1321205A2 (fr) * 2001-12-19 2003-06-25 Bayerische Motoren Werke Aktiengesellschaft Méthode de jonction des pièces

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508632C2 (de) * 1995-03-10 2002-09-19 Audi Ag Verfahren zum Verbinden eines ersten Bauteiles mit einem zweiten Bauteil
US5816089A (en) * 1996-11-26 1998-10-06 Dana Corporation Hydroforming apparatus having in-die hole piercing capabilities and a slug ejection system using hydroforming fluid
US6134767A (en) * 1997-04-10 2000-10-24 Meleghy Hydroforming Gmbh & Co. Kg Method for embedding connection elements in a wall
DE19733477C2 (de) * 1997-08-02 1999-12-02 Daimler Chrysler Ag Verfahren zum Herstellen eines mit einem Fügeteil verbundenen von einer Ausgangsform mittels Innenhochdruck in eine Endform umgeformten Hohlprofiles sowie Vorrichtung zur Durchführung des Verfahrens
DE19733476C2 (de) * 1997-08-02 1999-08-19 Daimler Chrysler Ag Verfahren zur Herstellung einer montagegerechten Anbringungsstelle an einem Hohlprofil
WO2001003881A1 (fr) * 1999-07-09 2001-01-18 Profil Verbindungstechnik Gmbh & Co. Kg Procede pour placer un element fonctionnel; matrice; element fonctionnel; element assemble et ensemble poinçon

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1321205A2 (fr) * 2001-12-19 2003-06-25 Bayerische Motoren Werke Aktiengesellschaft Méthode de jonction des pièces

Also Published As

Publication number Publication date
EP1321201A3 (fr) 2003-08-13
DE10162393A1 (de) 2003-07-03
DE50200798D1 (de) 2004-09-16
EP1321201A2 (fr) 2003-06-25

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