Title:
METALLIC-FABRICATED-MATERIAL MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/230001
Kind Code:
A1
Abstract:
The accuracy of the outer diameter of a metallic fabricated material having a circular tube section is improved. A metallic-fabricated-material manufacturing method according to the present invention includes a circular-tube-section forming step S300 and an elongation step S302. In the circular-tube-section forming step S300, plastic working is applied to a metal plate (not shown) so as to form a metallic fabricated material. In the elongation step S302, in a state in which a flange section of the metallic fabricated material is fixed, a rotation punch proceeds into a circular tube section of the metallic fabricated material. Accordingly, the circular tube section is elongated.
Inventors:
FUJII NAOKI (JP)
Application Number:
PCT/JP2017/026055
Publication Date:
December 20, 2018
Filing Date:
July 19, 2017
Export Citation:
Assignee:
KANEMITSU CORP (JP)
International Classes:
B21D22/28; B21D3/14; B21D22/16; B21D51/18
Foreign References:
| JPS5215472A | 1977-02-05 | |||
| JPS55161535A | 1980-12-16 |
Attorney, Agent or Firm:
SUZUE Shoji (JP)
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