Title:
METHOD OF EXTRUDING HOLLOW LIGHT METAL MEMBER, DIE FOR EXTRUDING HOLLOW LIGHT METAL, AND MEMEBER FOR EXTRUDING HOLLOW LIGHT METAL
Document Type and Number:
WIPO Patent Application WO/2004/103596
Kind Code:
A1
Abstract:
A method of extruding a hollow light metal member capable of always stably manufacturing the hollow light metal member (product) with excellent mechanical properties by using a hollow die such as a bridge die and efficiently improving the quality of the product matching the requested level of strength at low cost, comprising the steps of dividing, converging, and welding a light metal raw material with the hollow extruding die and extruding the material through a die hole to form in a specified cross sectional shape. A deformed amount provided to the light metal raw material after the converging and welding is maintained at 1.8 or higher before the extrusion.
Inventors:
Maeno, Sumihiko c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
Sakae, Akira c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
Sakae, Akira c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
Application Number:
PCT/JP2004/006601
Publication Date:
December 02, 2004
Filing Date:
May 11, 2004
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (10-26, Wakinohamacho 2-chome Chuo-ku, Kobe-sh, Hyogo 85, 65185, JP)
Maeno, Sumihiko c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
Sakae, Akira c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
Maeno, Sumihiko c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
Sakae, Akira c/o Kobe Corporate Research Laboratories in KABUSHIKI KAISHA KOBE SEIKO SHO (5-5 Takatsukadai 1-chome, Nishi-ku, Kobe-sh, Hyogo 71, 65122, JP)
International Classes:
B21C23/08; B21C25/02; (IPC1-7): B21C23/08; B21C25/02
Attorney, Agent or Firm:
Kotani, Etsuji (Nichimen Building 2nd Floor, 2-2 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, 53000, JP)
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