EP0593950A1 - Procédé de fixation d'un insert tubulaire de renforcement dans une structure métallique tubulaire et dispositif d'utilisation du procédé - Google Patents

Procédé de fixation d'un insert tubulaire de renforcement dans une structure métallique tubulaire et dispositif d'utilisation du procédé Download PDF

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Publication number
EP0593950A1
EP0593950A1 EP93115680A EP93115680A EP0593950A1 EP 0593950 A1 EP0593950 A1 EP 0593950A1 EP 93115680 A EP93115680 A EP 93115680A EP 93115680 A EP93115680 A EP 93115680A EP 0593950 A1 EP0593950 A1 EP 0593950A1
Authority
EP
European Patent Office
Prior art keywords
tubular
insert
wall
tubular structure
punch
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.)
Granted
Application number
EP93115680A
Other languages
German (de)
English (en)
Other versions
EP0593950B1 (fr
Inventor
Mario Da Re'
Paolo Giuseppe Guidoboni
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.)
Fiat Auto SpA
Original Assignee
Fiat Auto SpA
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 Fiat Auto SpA filed Critical Fiat Auto SpA
Publication of EP0593950A1 publication Critical patent/EP0593950A1/fr
Application granted granted Critical
Publication of EP0593950B1 publication Critical patent/EP0593950B1/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
    • B21D26/033—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
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/044—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods perpendicular

Definitions

  • the present invention relates to a process for fixing a tubular reinforcing insert to a tubular metal structure.
  • the tubular structure may be the chassis of the motor vehicle, the support frame for the engine or a supporting structure in general.
  • a welding technique is used.
  • the reinforcing insert serves as an anchorage for mechanical parts.
  • the reinforcing insert serves as the seat for vibration-damping supports and is subject to traction or axial-compressive stresses and/or cutting forces.
  • the object of the present invention is to provide a different system for fixing the reinforcing insert so as to avoid welding.
  • This technique involves a considerable reduction in the working time compared with normal fixing by welding. Moreover, if the number of reinforcing inserts to be fixed to the main structure is increased, the working time remains constant in that the operation is carried out in a single forming tool. On the contrary, when inserts are fixed by welding, the working time increases proportionally with the number of pieces to be welded.
  • the joint obtained by the process of the invention has greater resistance to cutting forces by virtue of the greater resistant surface offered by the collar formed in the wall of the tubular structure.
  • the dimensions of the joint are also more precise than in traditional fixing by welding.
  • the invention also concerns equipment for carrying out the process defined above.
  • a tubular structure is indicated 10 to which a tubular reinforcing insert 12 is to be fixed.
  • Two dies one movable relative to the other, are indicated 14 and 16 and are adapted to clamp the tubular structure 10 between them.
  • the die 14, 16 have respective seats 18, 20 which together form a deformation chamber.
  • the lower die 16 has a recess 22 from the base wall of which projects a cylindrical punch 24 which, in use, extends perpendicular to the axis of the tubular structure 10.
  • the diameter of the punch 24 is substantially equal to the internal diameter of the reinforcing insert 12 so that the latter may be fitted onto the punch 24 without forcing.
  • the diameter of the recess 22 is slightly greater than the outer diameter of the insert 12.
  • the punch 24 has a pointed part which projects beyond the corresponding end of the reinforcing insert 12.
  • the insert 12 has a conical end portion 26 ending with an annular groove 28.
  • the structure 10 is disposed between the two dies 14, 16 and is connected to a hydraulic circuit (not illustrated) which directs high pressure fluid into the tubular structure 10.
  • This forming technique is known per se and is generally termed "hydroforming".
  • the portion of the structure which is located in the deformation chamber 18, 20 expands radially until it is brought into contact with the walls of the seats 18, 20 which form the deformation chamber.
  • the punch 24 opens a hole 30 in the wall 10 ( Figure 3) causing inward deformation of a wall portion 32 which constitutes an annular collar.
  • the reinforcing insert 12 is inserted forcibly into the annular collar 32 ( Figure 4).
  • the pressurised fluid acting in the structure 10 compresses the collar 32 against the outer wall of the insert 12 and clamps the collar 32 against the groove 28 and the end portion 26 of the insert 12.
  • FIGS 5 and 6 illustrate the structure 10 after the fixing of the insert 12 in the manner described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
EP93115680A 1992-10-22 1993-09-29 Procédé de fixation d'un insert tubulaire de renforcement dans une structure métallique tubulaire et dispositif d'utilisation du procédé Expired - Lifetime EP0593950B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920851A IT1256977B (it) 1992-10-22 1992-10-22 Procedimento per il fissaggio di un inserto tubolare di rinforzo ad una struttura tubolare metallica ed apparecchiatura per la realizzazione di tale procedimento.
ITTO920851 1992-10-22

Publications (2)

Publication Number Publication Date
EP0593950A1 true EP0593950A1 (fr) 1994-04-27
EP0593950B1 EP0593950B1 (fr) 1997-02-12

Family

ID=11410798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115680A Expired - Lifetime EP0593950B1 (fr) 1992-10-22 1993-09-29 Procédé de fixation d'un insert tubulaire de renforcement dans une structure métallique tubulaire et dispositif d'utilisation du procédé

Country Status (4)

Country Link
EP (1) EP0593950B1 (fr)
JP (1) JPH06198358A (fr)
DE (1) DE69308101T2 (fr)
IT (1) IT1256977B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0758565A1 (fr) * 1995-08-16 1997-02-19 Schäfer Hydroforming GmbH & Co. Procédé et dispositif pour la réalisation de perforations à travers de double paroies d'éléments de construction par le procédé de formage par pression interne ainsi qu'un bras oscillant réalisé de cette façon
EP0870557A1 (fr) * 1997-04-10 1998-10-14 Dr. Meleghy Hydroforming GmbH & Co. KG Méthode et dispositif pour introduire des elements de fixation dans un paroi
WO2000010746A3 (fr) * 1998-08-17 2000-06-08 Siempelkamp Pressen Sys Gmbh Procede de deformation par haute pression interne d'au moins deux corps creux dotes respectivement d'un orifice, notamment de tuyaux metalliques ou de profiles creux metalliques
US6134767A (en) * 1997-04-10 2000-10-24 Meleghy Hydroforming Gmbh & Co. Kg Method for embedding connection elements in a wall
WO2004004941A1 (fr) * 2002-07-05 2004-01-15 Daimlerchrysler Ag Procede et dispositif de fixation de composants sur des profiles creux de circonference fermee
FR2860742A1 (fr) * 2003-10-09 2005-04-15 Benteler Automobiltechnik Gmbh Procede pour lier une structure en tole a au moins un element de raccord
EP2077168A4 (fr) * 2006-10-27 2013-03-27 Nippon Steel & Sumitomo Metal Corp Procédé de poinçonnage et dispositif de poinçonnage employant l'hydroformage et une partie hydrofromée et corps de structure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE516610C2 (sv) * 2000-06-29 2002-02-05 Saab Automobile Sätt att framställa ett förstärkt rörformigt profilelement genom hydroformning och ett sådant profilelement
DE102007007932B3 (de) * 2007-02-17 2008-12-18 Daimler Ag Verfahren und Vorrichtung zum Verbinden eines Anschlussbauteils mit einem Innenhochdruckumformteil
DE102010041971A1 (de) * 2010-10-05 2012-04-05 Arnold & Shinjo Gmbh & Co. Kg Verfahren und Vorrichtung zum Anbringen von Stanzelementen an Rohren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350905A (en) * 1963-12-21 1967-11-07 Agency Ind Science Techn Liquid pressure bulge forming apparatus
FR1532737A (fr) * 1966-07-12 1968-07-12 Western Electric Co Fabrication d'un objet tubulaire présentant des parties de sections droites différentes
EP0293101A2 (fr) * 1987-05-06 1988-11-30 Flowdrilling Limited Procédé de réalisation d'un joint angulaire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350905A (en) * 1963-12-21 1967-11-07 Agency Ind Science Techn Liquid pressure bulge forming apparatus
FR1532737A (fr) * 1966-07-12 1968-07-12 Western Electric Co Fabrication d'un objet tubulaire présentant des parties de sections droites différentes
EP0293101A2 (fr) * 1987-05-06 1988-11-30 Flowdrilling Limited Procédé de réalisation d'un joint angulaire

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0758565A1 (fr) * 1995-08-16 1997-02-19 Schäfer Hydroforming GmbH & Co. Procédé et dispositif pour la réalisation de perforations à travers de double paroies d'éléments de construction par le procédé de formage par pression interne ainsi qu'un bras oscillant réalisé de cette façon
US5799524A (en) * 1995-08-16 1998-09-01 Schafer Hydroforming Gmbh & Co. Pressure forming and piercing a hollow body
EP0870557A1 (fr) * 1997-04-10 1998-10-14 Dr. Meleghy Hydroforming GmbH & Co. KG Méthode et dispositif pour introduire des elements de fixation dans un paroi
DE19714902A1 (de) * 1997-04-10 1998-10-15 Meleghy Hydroforming Gmbh & Co Verfahren und Vorrichtung zum Einbringen von Verbindungselementen in eine Wand
DE19714902C2 (de) * 1997-04-10 1999-05-12 Meleghy Hydroforming Gmbh & Co Verfahren und Vorrichtung zum Einbringen von Verbindungselementen in ein Blech
US6134767A (en) * 1997-04-10 2000-10-24 Meleghy Hydroforming Gmbh & Co. Kg Method for embedding connection elements in a wall
WO2000010746A3 (fr) * 1998-08-17 2000-06-08 Siempelkamp Pressen Sys Gmbh Procede de deformation par haute pression interne d'au moins deux corps creux dotes respectivement d'un orifice, notamment de tuyaux metalliques ou de profiles creux metalliques
US6574849B1 (en) 1998-08-17 2003-06-10 Siempelkamp Pressen Systeme Gmbh & Co. Method for deforming through high inner pressure at least two hollow bodies having each at least one opening, especially metal tubes or metal hollow profiles
WO2004004941A1 (fr) * 2002-07-05 2004-01-15 Daimlerchrysler Ag Procede et dispositif de fixation de composants sur des profiles creux de circonference fermee
FR2860742A1 (fr) * 2003-10-09 2005-04-15 Benteler Automobiltechnik Gmbh Procede pour lier une structure en tole a au moins un element de raccord
US7124490B2 (en) 2003-10-09 2006-10-24 Benteler Automobil Technik Gmbh Joining of two components in a hot forming process
EP2077168A4 (fr) * 2006-10-27 2013-03-27 Nippon Steel & Sumitomo Metal Corp Procédé de poinçonnage et dispositif de poinçonnage employant l'hydroformage et une partie hydrofromée et corps de structure

Also Published As

Publication number Publication date
JPH06198358A (ja) 1994-07-19
IT1256977B (it) 1995-12-27
ITTO920851A1 (it) 1994-04-22
DE69308101T2 (de) 1997-05-28
DE69308101D1 (de) 1997-03-27
ITTO920851A0 (it) 1992-10-22
EP0593950B1 (fr) 1997-02-12

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