Title:
MAGNESIUM-BASE ALLOY SCREW AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/113742
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a method of manufacturing a magnesium-base alloy screw capable of manufacturing, with high productivity, a screw formed of a magnesium-base alloy with excellent strength and the magnesium-base alloy screw. [MEANS FOR SOLVING PROBLEMS] The method comprises a head forging step for manufacturing a screw blank by performing a warm head working to form a screw head part on a wire formed of the magnesium-base alloy obtained by drawing and a rolling step for manufacturing the screw by performing a warm rolling working to form screw threads in the screw blank. In the head forging step, the head working is performed by using a holding die fixing the wire and a punch forming the screw head part, the holding die and the punch are heated, and at least the holding die is heated to a temperature of 140 to 250&ring C to heat the wire to a temperature of 140 to less than 250&ring C.
Inventors:
OISHI YUKIHIRO (JP)
KAWABE NOZOMU (JP)
HASHIMOTO KENZABURO (JP)
FUKUDA KENJI (JP)
KAWABE NOZOMU (JP)
HASHIMOTO KENZABURO (JP)
FUKUDA KENJI (JP)
Application Number:
PCT/JP2004/008342
Publication Date:
December 29, 2004
Filing Date:
June 15, 2004
Export Citation:
Assignee:
SUMITOMO SEI STEEL WIRE CORP (JP)
OISHI YUKIHIRO (JP)
KAWABE NOZOMU (JP)
HASHIMOTO KENZABURO (JP)
FUKUDA KENJI (JP)
OISHI YUKIHIRO (JP)
KAWABE NOZOMU (JP)
HASHIMOTO KENZABURO (JP)
FUKUDA KENJI (JP)
International Classes:
B21H3/06; B21J1/06; B21J5/00; B21K1/46; B21K27/06; C22C23/02; C22F1/00; C22F1/06; F16B33/00; F16B35/00; (IPC1-7): F16B35/00; C22C23/00; C22F1/06; B21H3/06; B21K1/56; B21J5/00
Foreign References:
JPH07278717A | 1995-10-24 | |||
JPH05504602A | 1993-07-15 | |||
JPS60221142A | 1985-11-05 | |||
JPH11172359A | 1999-06-29 | |||
JP2000343178A | 2000-12-12 |
Other References:
See also references of EP 1640622A4
Attorney, Agent or Firm:
Yamano, Hiroshi (10F ASTRO Shin Osaka 2 Bldg., 1-3,
Nishinakajima 6-chome, Yodogawa-k, Osaka-shi Osaka, JP)
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