Title:
SPINNING DEVICE AND SPINNING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/122656
Kind Code:
A1
Abstract:
An axial end part 11 of a cylindrical pipe 10 is fixed by a conical recess 31 of a main-shaft-side chuck 30 and a conical projection 41 of a mandrel 40, a spinning roll 50 is then pressed against the cylindrical pipe 10, which is supported by a columnar part 42 of the mandrel 40, and the thickness of the cylindrical pipe 10 is reduced. The clamping mechanism in the present invention is therefore simpler than in conventional spin forming and fewer steps are involved; therefore, processing time can be reduced. Because the spinning roll 50 is pressed against the cylindrical pipe 10 supported by the columnar part 42 of the mandrel 40 and the thickness of the cylindrical pipe 10 is reduced, the shape of the cylindrical pipe 10 after thickness reduction is simpler than in the prior art, and the inside diameter thereof is substantially constant except for the axial end part 11. The mandrel 40 can therefore easily be applied to forming various types of wheel rims.
Inventors:
YOSHII KENJI (JP)
KATO HIROYASU (JP)
KAKAMI TATSURO (JP)
ENAMI KEITARO (JP)
IWAKURA YUJI (JP)
KATO HIROYASU (JP)
KAKAMI TATSURO (JP)
ENAMI KEITARO (JP)
IWAKURA YUJI (JP)
Application Number:
PCT/JP2017/000563
Publication Date:
July 20, 2017
Filing Date:
January 11, 2017
Export Citation:
Assignee:
TOPY IND (JP)
International Classes:
B21D22/16; B21D53/30; B21H1/04
Foreign References:
| JPS62220231A | 1987-09-28 | |||
| JPS60121024A | 1985-06-28 | |||
| JPS5317563A | 1978-02-17 | |||
| JP2014176859A | 2014-09-25 |
Attorney, Agent or Firm:
TABUCHI, Tsuneo et al. (JP)
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