EP1197274B1 - Presse de formage hydraulique sous pression élevée - Google Patents

Presse de formage hydraulique sous pression élevée Download PDF

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Publication number
EP1197274B1
EP1197274B1 EP01127374A EP01127374A EP1197274B1 EP 1197274 B1 EP1197274 B1 EP 1197274B1 EP 01127374 A EP01127374 A EP 01127374A EP 01127374 A EP01127374 A EP 01127374A EP 1197274 B1 EP1197274 B1 EP 1197274B1
Authority
EP
European Patent Office
Prior art keywords
tube
end engaging
hydroforming
fluid
engaging structure
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
EP01127374A
Other languages
German (de)
English (en)
Other versions
EP1197274A1 (fr
Inventor
Frederico G. Jaekel
Frank A. Horton
Arthur L. Lee
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.)
Cosma International Inc
Original Assignee
Cosma International Inc
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 Cosma International Inc filed Critical Cosma International Inc
Priority claimed from EP98914753A external-priority patent/EP0975448B1/fr
Publication of EP1197274A1 publication Critical patent/EP1197274A1/fr
Application granted granted Critical
Publication of EP1197274B1 publication Critical patent/EP1197274B1/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
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature

Definitions

  • the tube-end engaging structure seals opposite ends of the tubular metal blank in said die cavity and is movable to longitudinally.
  • the side ram assemblies 28 and 30 of the present invention employ pressur intensifying structures 110 within tube-end engaging structures 36 and 38, there is no need to provide a separate, costly "intensifier" system for providing high internal pressures to expand the tube.
  • intensifiers are normally required in high pressure hydroforming systems (i.e., hydroforming systems that utilize hydraulic expansion pressures greater than 2,000 atmospheres), and heretofore have been particularly required in high pressure hydroforming operations in which the opposite ends of a tube are engaged and forced inwardly to effect metal material flow along the length of the tube to replenish or maintain the wall thickness of the tube during expansion thereof.
  • intensifiers have been used in conjunction with separate side ram members that are used only to push the opposite ends of the tube inwardly to effect the aforementioned material flow.
  • the frame assembly 222 includes a pair of press side frame members 232 depicted as parallel laterally spaced elongate vertical members for mountin the upper press assembly 224 and lower press assembly 228.
  • the upper ends of the side frame members 232 have a crown plate 234 mounted across the tops thereof.
  • the crown plate 234 serves as support for parts of the hydraulic fluid system, to be described later.
  • a front end portion of the tube-end engaging structure 282 that protrudes beyond the front member 276 of the cylinder 274 is of slightly reduced diameter, and at the forward end of this front portion of the piston rod is a tube engaging portion in the form of a tapered nose section 288.
  • the tapered nose section 288 is constructed and arranged to be received within the open end of a tube blank T to be hydroformed.
  • the rearward portion of the tapered nose section 288 preferably has a radially outwardly extending annular flange (not shown) which abuts against the end edge of the tube blank T to enable nose section 288 to apply a substantial force against the tube end in the longitudinal tube direction.
  • the water pump and motor 360 draws hydroforming fluid from the upper gravity tank 330 through line 362 and pumps it through a flex line 364 and a high pressure close-out valve 366.
  • the hydroforming fluid travels into the intensifier chamber 306 from the close-out valve 366.
  • pump and motor 360 is omitted, and hydroforming fluid travels from tank 330 to chamber 306 under force of gravity.
  • the fluid is forced under low pressure from chamber 306 under force of gravity.
  • the fluid is forced under low pressure from chamber 306 into the tube T through the fluid outlet 308 in the nose of the tube-end engaging structure 304.
  • the high pressure seal 301 prevents the hydroforming fluid 350 from tank 330 from mixing with the hydraulic fluid 336 from tank 338.

Claims (4)

  1. Appareil (10, 220) permettant l'hydroformage d'une ébauche métallique tubulaire (T) comprenant :
    une structure de matrice (12, 228) ayant une surface de matrice interne définissant une empreinte, ladite empreinte étant construite et agencée pour recevoir l'ébauche métallique tubulaire (T) ;
    une structure d'engagement sur l'extrémité du tube à entraînement hydraulique (36, 38, 282, 304), construite et agencée pour s'engager sur, et assurer l'étanchéité des extrémités opposées de l'ébauche métallique tubulaire (T) dans ladite empreinte, ladite structure d'engagement sur l'extrémité du tube (36, 38, 282, 304) étant mobile, afin de comprimer l'ébauche métallique tubulaire (T) dans le sens de la longueur,
       caractérisé en ce que
       une source de fluide d'hydoformage (80, 330) disposée plus haut que ladite empreinte, est construite et agencée pour fournir un fluide d'hydroformage intérieurement à ladite ébauche métallique tubulaire (T) sous la force de la pesanteur ;
       ladite structure d'engagement sur l'extrémité du tube (36, 38, 282, 304) est construite et agencée pour recevoir le fluide d'hydroformage provenant de ladite source de fluide d'hydoformage (80, 330) et présente un orifice de sortie délivrant le fluide d'hydroformage, lequel fluide d'hydroformage peut être fourni à l'intérieur de l'ébauche métallique tubulaire (T) ;
       et une structure d'amplification de pression à commande hydraulique (110, 300) qui peut se déplacer en réponse à une pression du fluide hydraulique, afin de mettre sous pression ledit fluide d'hydroformage, fourni à l'intérieur de l'ébauche métallique tubulaire (T) et ainsi dilater un diamètre de l'ébauche (T) jusqu'à ce qu'une surface extérieure de l'ébauche métallique tubulaire (T) se conforme, de manière générale, à celle de ladite surface de matrice intérieure, ladite structure d'engagement sur l'extrémité du tube à entraînement hydraulique (36, 38, 282, 304) pouvant se déplacer en réponse à une pression du fluide hydraulique afin de permettre à ladite structure d'engagement sur l'extrémité du tube (36, 38, 282, 304) de comprimer l'ébauche métallique tubulaire (T) dans le sens de la longueur, et de provoquer l'écoulement, vers l'intérieur, dans le sens de la longueur, du métal de l'ébauche tubulaire dilatée diamétralement, afin de compléter une épaisseur de paroi de l'ébauche métallique tubulaire dilatée diamétralement et de maintenir l'épaisseur de paroi de celle-ci à l'intérieur d'une plage prédéterminée.
  2. Appareil selon la revendication 1, dans lequel ladite source de fluide d'hydroformage (330) fournit ledit fluide d'hydroformage par l'intermédiaire d'une première voie de passage (334) afin de remplir ladite ébauche métallique tubulaire (T) avant que ladite structure d'engagement sur l'extrémité du tube (282, 304) ne s'engage sur les extrémités opposées de ladite ébauche métallique tubulaire (T), et dans lequel ladite source de fluide d'hydroformage (330) fournit ledit fluide d'hydroformage par l'intermédiaire d'une seconde voie de passage (362) différente de ladite première voie de passage (334) jusqu'à ladite structure d'engagement sur l'extrémité du tube (304) et à travers ladite sortie délivrant le fluide d'hydroformage à l'intérieur de ladite ébauche métallique tubulaire (T), après que ladite structure d'engagement sur l'extrémité du tube a été engagée sur les extrémités opposées de ladite ébauche métallique tubulaire.
  3. Appareil selon la revendication 2, dans lequel ledit fluide d'hydroformage est forcé de prendre la première (334), et la seconde (362) voies de passage, sous l'effet de la force de la pesanteur.
  4. Appareil selon la revendication 3, dans lequel ladite seconde voie de passage (362) comprend une pompe (360) afin de faciliter l'écoulement du fluide d'hydroformage vers ladite structure d'engagement sur l'extrémité du tube (304).
EP01127374A 1997-04-16 1998-04-16 Presse de formage hydraulique sous pression élevée Expired - Lifetime EP1197274B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US4395097P 1997-04-16 1997-04-16
US43950P 1997-04-16
EP98914753A EP0975448B1 (fr) 1997-04-16 1998-04-16 Presse de formage hydraulique sous pression elevee

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP98914753A Division EP0975448B1 (fr) 1997-04-16 1998-04-16 Presse de formage hydraulique sous pression elevee

Publications (2)

Publication Number Publication Date
EP1197274A1 EP1197274A1 (fr) 2002-04-17
EP1197274B1 true EP1197274B1 (fr) 2004-12-29

Family

ID=26152478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127374A Expired - Lifetime EP1197274B1 (fr) 1997-04-16 1998-04-16 Presse de formage hydraulique sous pression élevée

Country Status (1)

Country Link
EP (1) EP1197274B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103464563A (zh) * 2013-09-13 2013-12-25 佛山市康思达液压机械有限公司 一种管材外高压充液成形装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6475753B2 (ja) 2014-04-21 2019-02-27 住友重機械工業株式会社 成形装置
CN117415211B (zh) * 2023-12-19 2024-02-23 河北海航管道制造有限公司 用于制备斜三通的系统

Family Cites Families (4)

* 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
DE2935086C2 (de) * 1979-08-28 1982-04-01 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zur Herstellung von abgesetzten Hohlkörpern stark unterschiedlicher Querschnittsformen
IT1240233B (it) * 1990-02-02 1993-11-27 Europa Metalli Lmi Procedimento per la realizzazione di elementi monolitici cavi in materiale metallico
DE4201819A1 (de) * 1991-01-28 1992-07-30 Mannesmann Ag Verfahren und vorrichtung zum hydraulischen aufweiten von rohrfoermigen hohlprofilen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103464563A (zh) * 2013-09-13 2013-12-25 佛山市康思达液压机械有限公司 一种管材外高压充液成形装置
CN103464563B (zh) * 2013-09-13 2016-04-27 佛山市康思达液压机械有限公司 一种管材外高压充液成形装置

Also Published As

Publication number Publication date
EP1197274A1 (fr) 2002-04-17

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