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Title:
PRESS DIE AND METHOD FOR TREATING SURFACE OF PRESS DIE
Document Type and Number:
WIPO Patent Application WO/2000/006331
Kind Code:
A1
Abstract:
A die having a good abrasion resistance even at a cutting side face (104) including a die hole inner circumferential face and a long life and not inviting an increase in deform of a press-formed article due to the wear of the cutting side face after a long use by forming, on a cutting side face (104), a modified layer (108) of an electrode wear fused substance of a discharge electrode (15) produced by electric discharge energy of submerged electric discharge machining or of reaction products of the electrode wear fused substance.

Inventors:
Satou, Seiji (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
Goto, Akihiro (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
Application Number:
PCT/JP1999/001700
Publication Date:
February 10, 2000
Filing Date:
March 31, 1999
Export Citation:
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Assignee:
MITSUBISHI DENKI KABUSHIKI KAISHA (2-3 Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
Satou, Seiji (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
Goto, Akihiro (Mitsubishi Denki Kabushiki Kaisha 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo, 100-8310, JP)
International Classes:
B23H9/00; B21D37/01; B21D37/20; B30B15/02; C23C26/00; C23C26/02; C23C30/00; (IPC1-7): B23H9/00
Foreign References:
JPH08300227A1996-11-19
JPH09192937A1997-07-29
JPH0919829A1997-01-21
JPS53137010A1978-11-30
JPH08243843A1996-09-24
JPH05148615A1993-06-15
JPH06182626A1994-07-05
Attorney, Agent or Firm:
Sakai, Hiroaki (Tokyo Club Building 2-6, Kasumigaseki 3-chome Chiyoda-ku Tokyo, 100-0013, JP)
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