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Patent Searching and Data


Title:
MEMBER MACHINING METHOD AND MEMBER JOINING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/025666
Kind Code:
A1
Abstract:
This member machining method comprises: preparing a rubber 30 and an aluminum pipe 20 which has a hollow shape extending in an axis L direction and an inner circumferential surface 21a of which has a cross-sectional shape, in the axis L direction, provided with a corner part 23a having a round section 22a, the shape of the corner part 23a being defined by the expression below; inserting the rubber 30 into the aluminum pipe 20; and enlarging, deforming, and machining the aluminum pipe 20 by compressing the rubber 30 in the axis L direction and by expanding the rubber 30 radially outward with respect to the axis L. θ represents the angle of a corner part of a first member on the inner circumferential surface, Rc represents the radius, at the round section, of the inner circumferential surface of the corner part of the first member, L1 represents the straight-line length of one of two side parts forming the corner part of the first member, L2 represents the straight-line length of the other one of the two side parts forming the corner part of the first member, and n represents an n value (a work-hardening index) of a material of the first member.

Inventors:
MAEDA, Yasuhiro
HASHIMURA, Toru
WATANABE, Kenichi
Application Number:
JP2017/026469
Publication Date:
February 08, 2018
Filing Date:
July 21, 2017
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) (2-4 Wakinohama-Kaigandori 2-chome, Chuo-ku Kobe-sh, Hyogo 85, 〒6518585, JP)
International Classes:
B21D41/02; B21D19/08; B21D39/06; B21D39/20
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (AOYAMA & PARTNERS, Umeda Hankyu Bldg. Office Tower 8-1, Kakuda-cho, Kita-ku, Osaka-sh, Osaka 17, 〒5300017, JP)
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