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Patent Searching and Data


Title:
HOLLOW TUBE MATERIAL MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/134941
Kind Code:
A1
Abstract:
This method for manufacturing a hollow tube material involves: a step for arranging a steel tube, i.e., the raw material, inside of an outer mold having an inner surface of the same shape as the outer surface of the hollow tube material, at least partly separated from the inner surface; and a step for axially compressing the steel tube by reducing the relative distance between a pair of pressure molds that contact both axial end surfaces of the steel tube in a state in which a core portion, having an outer surface shape that is the same as the inner surface shape of both axial end portions of the hollow tube material, is inserted between the pair of pressure molds at least partly separated from the inner surface of the steel tube.

Inventors:
YOSHIDA Hiroshi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
MIZUMURA Masaaki (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
MORI Yasunori (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
KUBOTA Hiroaki (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2016/087396
Publication Date:
August 10, 2017
Filing Date:
December 15, 2016
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
B21J5/08; B21J5/02; B21K1/10; F16C3/02
Attorney, Agent or Firm:
SHIGA Masatake et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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