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Patent Searching and Data


Title:
METHOD OF MANUFACTURING RING-SHAPED MEMBER
Document Type and Number:
WIPO Patent Application WO/2007/043564
Kind Code:
A1
Abstract:
A method of manufacturing a ring-shaped member capable of reducing cost by increasing a yield represented by the ratio of the weight of the ring-shaped member to the weight of a raw material and a yield represented by the ratio of the weight of the ring-shaped member to the weight of a blank. A half-finished product (18) having largely curved parts (3D) formed by enlarging curved parts (3d) to increase its radius of curvature more than its initial radius of curvature and expansion parts (3E) curvedly formed in a circular arc shape on linear parts (3b, 3c) with a radius of curvature larger than the radius of curvature of the curved parts (3d) is molded, and then the half-finished product (18) is molded in a ring shape to provide the ring-shaped member (1).

Inventors:
KANEMITSU TOSHIAKI (JP)
KANEMITSU SHUJI (JP)
ODA MISAO (JP)
OHNISHI MASATAKA (JP)
FUJII NAOKI (JP)
ODA KAZUYUKI (JP)
Application Number:
PCT/JP2006/320285
Publication Date:
April 19, 2007
Filing Date:
October 11, 2006
Export Citation:
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Assignee:
KANEMITSU CORP (JP)
KANEMITSU TOSHIAKI (JP)
KANEMITSU SHUJI (JP)
ODA MISAO (JP)
OHNISHI MASATAKA (JP)
FUJII NAOKI (JP)
ODA KAZUYUKI (JP)
International Classes:
B21D28/06; B21D53/16
Foreign References:
JPH0647139B21994-06-22
JPS62203633A1987-09-08
Attorney, Agent or Firm:
SUZUE, Shoji et al. (2-4 Komatsubara-cho, Kita-k, Osaka-shi Osaka 18, JP)
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