EP1138407A1 - Verfahren zum Innen-Hochdruck-Umformen eines Strukturbauteiles - Google Patents

Verfahren zum Innen-Hochdruck-Umformen eines Strukturbauteiles Download PDF

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Publication number
EP1138407A1
EP1138407A1 EP00201094A EP00201094A EP1138407A1 EP 1138407 A1 EP1138407 A1 EP 1138407A1 EP 00201094 A EP00201094 A EP 00201094A EP 00201094 A EP00201094 A EP 00201094A EP 1138407 A1 EP1138407 A1 EP 1138407A1
Authority
EP
European Patent Office
Prior art keywords
hydroforming
metal product
intermediate metal
range
structural member
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.)
Withdrawn
Application number
EP00201094A
Other languages
English (en)
French (fr)
Inventor
Jacobus Van Rijkom
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.)
Corus Technology BV
Original Assignee
Corus Technology BV
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 Corus Technology BV filed Critical Corus Technology BV
Priority to EP00201094A priority Critical patent/EP1138407A1/de
Publication of EP1138407A1 publication Critical patent/EP1138407A1/de
Withdrawn legal-status Critical Current

Links

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
    • B21D26/053—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
    • B21D26/055—Blanks having super-plastic properties

Definitions

  • the invention relates to a method of manufacturing a shaped and hollow structural member, in particular of aluminium, via a hydroforming process. Further the invention relates to a product obtained via such a method.
  • aluminium refers also to aluminium alloys.
  • forming is an important tool in manufacturing complex shapes with as main materials steel and aluminium.
  • Suppliers are urged to improve the formability of their materials and to integrate their processes because of, amongst others, costs and environmental aspects.
  • a part of this objective can be achieved using a relative novel forming technology such as hydroforming.
  • hydroforming In a typical hydroforming operation, for example a cylindrical metal tube is bent into the overall shape desired for the final part, then placed between a pair of dies. The dies provide a cavity around the tube which has an interior shape matching the exterior shape desired for the part.
  • An object of the invention is to provide an improved method of manufacturing a shaped and hollow structural member via a hydroforming process using an extruded or welded tubular or hollow metal product as starting material.
  • Another object of the invention is to provide an improved method of manufacturing a shaped and hollow structural member via a hydroforming process using an extruded or welded tubular or hollow aluminium product as starting material.
  • the pressure medium used during hydroforming is a hydraulic oil which can withstand the relatively high temperatures.
  • the intermediate metal product and/or the hydroforming dies are pre-warmed, when possibly they may are be pre-warmed locally. This further improves the method and optimises the hydroforming behaviour of the metal used.
  • the metal product can be pre-heated, locally, to a temperature in a range of 200 to 400°C in for example an air circulating furnace prior to placing the metal product in the hydroforming dies.
  • the method in accordance with the invention is particularly suitable for aluminium alloys, and more in particular for aluminium alloys from the Aluminium Association (AA)5xxx-series having Mg as major alloying element in a typical range of 2 to 6 weight percent, and preferably produced on an industrial annealing furnace with a controlled heating-rate between 2 to 200 °C/sec, and a soaking time in the range up to 40 sec. at a soaking temperature in the range of 400 to 550°C, followed by a controlled cooling rate in the range of 10 to 500 °C/sec.
  • AA Aluminium Association
  • a typical property of a good warm hydroforming behaviour aluminium alloy are those which show a good necking resistance (high m at elevated temperature) with relative moderate strain rates ( ⁇ '), such as AA5182 material in an O-temper condition providing good dimensional rigidity.
  • ⁇ ' relative moderate strain rates
  • the improved forming characteristics of aluminium at elevated temperature are used to manufacture complex structural members via hydroforming.
  • the ductility is superior to standards steel grades under ambient conditions.
  • Another suitable aluminium alloy is the aluminium alloy obtained from the method as described in the European patent no. EP-A-0818553, which is incorporated here by reference.
  • a suitable process comprises more preferably the following subsequent processing steps:-
  • a structural component or members for a vehicle obtained via the method of the invention as set forth above.
  • a particular embodiment of such a structural component or member is the A-, B-, or C-pillar of a vehicle.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP00201094A 2000-03-27 2000-03-27 Verfahren zum Innen-Hochdruck-Umformen eines Strukturbauteiles Withdrawn EP1138407A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00201094A EP1138407A1 (de) 2000-03-27 2000-03-27 Verfahren zum Innen-Hochdruck-Umformen eines Strukturbauteiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00201094A EP1138407A1 (de) 2000-03-27 2000-03-27 Verfahren zum Innen-Hochdruck-Umformen eines Strukturbauteiles

Publications (1)

Publication Number Publication Date
EP1138407A1 true EP1138407A1 (de) 2001-10-04

Family

ID=8171257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00201094A Withdrawn EP1138407A1 (de) 2000-03-27 2000-03-27 Verfahren zum Innen-Hochdruck-Umformen eines Strukturbauteiles

Country Status (1)

Country Link
EP (1) EP1138407A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022132610A1 (en) * 2020-12-14 2022-06-23 Novelis Inc. Roll forming system with heat treatment and associated methods
CN115846497A (zh) * 2022-12-20 2023-03-28 烟台丛林精密机械有限公司 一种超塑成形设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733539A1 (de) * 1995-03-22 1996-09-25 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Hohlprofil für eine Trägerstruktur eines Kraftfahrzeuges
EP0818553A1 (de) * 1996-06-28 1998-01-14 Hoogovens Aluminium N.V. Blech aus Aluminium vom Typ AA5000 und Verfahren zu seiner Herstellung
DE19642824A1 (de) * 1996-10-17 1998-04-23 Hermann Bartels Verfahren und Vorrichtung zum Verformen von Hohlprofil-Werkstücken aus Metall
WO1998024940A1 (en) * 1996-12-04 1998-06-11 Alcan International Limited A1 alloy and method
EP0913277A1 (de) * 1997-10-29 1999-05-06 TRW Canada Ltd. Führungslenker und Verfahren zu seiner Herstellung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733539A1 (de) * 1995-03-22 1996-09-25 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Hohlprofil für eine Trägerstruktur eines Kraftfahrzeuges
EP0818553A1 (de) * 1996-06-28 1998-01-14 Hoogovens Aluminium N.V. Blech aus Aluminium vom Typ AA5000 und Verfahren zu seiner Herstellung
DE19642824A1 (de) * 1996-10-17 1998-04-23 Hermann Bartels Verfahren und Vorrichtung zum Verformen von Hohlprofil-Werkstücken aus Metall
WO1998024940A1 (en) * 1996-12-04 1998-06-11 Alcan International Limited A1 alloy and method
EP0913277A1 (de) * 1997-10-29 1999-05-06 TRW Canada Ltd. Führungslenker und Verfahren zu seiner Herstellung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022132610A1 (en) * 2020-12-14 2022-06-23 Novelis Inc. Roll forming system with heat treatment and associated methods
CN115846497A (zh) * 2022-12-20 2023-03-28 烟台丛林精密机械有限公司 一种超塑成形设备
CN115846497B (zh) * 2022-12-20 2024-02-23 烟台丛林精密机械有限公司 一种超塑成形设备

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