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Patent Searching and Data


Title:
SEAMLESS STEEL TUBE FOR DRIVE SHAFT AND METHOD OF MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/071686
Kind Code:
A1
Abstract:
A method of manufacturing a seamless steel tube for a drive shaft and a method of manufacturing the seamless steel tube, wherein a hollow member for the drive shaft having excellent fatigue strength and suitable for reducing the weight of a vehicle body can be manufactured by applying a facilitated inner surface cutting and the subsequent cold reduction to a steel tube hot-drawn by a Mannesmann tube manufacturing method to specify the recessed part depth (d), surface roughness (Ra), and recessed part inlet width (w) of recessed and protruded parts forming the inner surface of the steel tube or, in the same manner, to specify the recessed part depth (d), Vickers hardness (Hv) of the inner surface layer, and recessed part inlet width (w) of the recessed and protruded parts. Since the drive shaft for car can be efficiently manufactured at low production cost, the effect thereof can be industrially increased.

Inventors:
Kuroda, Kouichi c/o Sumitomo Metal Industries Ltd. (5-33, Kitahama 4-chome, Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Okui, Tatsuya c/o Sumitomo Metal Industries Ltd. (5-33 Kitahama 4-chome, Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Hitoshio, Keisuke c/o Sumitomo Metal Industries Ltd. (5-33 Kitahama 4-chome, Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Application Number:
PCT/JP2004/000781
Publication Date:
August 26, 2004
Filing Date:
January 28, 2004
Export Citation:
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Assignee:
SUMITOMO METAL INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Kuroda, Kouichi c/o Sumitomo Metal Industries Ltd. (5-33, Kitahama 4-chome, Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Okui, Tatsuya c/o Sumitomo Metal Industries Ltd. (5-33 Kitahama 4-chome, Chuo-k, Osaka-shi Osaka, 541-0041, JP)
Hitoshio, Keisuke c/o Sumitomo Metal Industries Ltd. (5-33 Kitahama 4-chome, Chuo-k, Osaka-shi Osaka, 541-0041, JP)
International Classes:
B21B17/02; B21B17/14; B21B19/04; B21B23/00; B21B27/02; (IPC1-7): B21B17/14; B21B17/02
Foreign References:
JP2002361319A2002-12-17
JP2822849B21998-11-11
JPH01122608A1989-05-15
JPH0716616A1995-01-20
Other References:
See also references of EP 1595609A1
Attorney, Agent or Firm:
Mori, Michio (M. Mori Patent Office Amagasaki Building, 17-23 Higashinaniwa-cho 5-chom, Amagasaki-shi Hyogo, 660-0892, JP)
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