To provide an upsetting processing method of a raw material having a pipe-shaped part, capable of easily forming a flange in an opening end part of the raw material by using a spinning machine, without requiring large-scaled equipment even in the raw material having the pipe-shaped part comparatively thick in a wall thickness.
The upsetting processing method is applied to a raw material 2 having a pipe-shaped part 2b, and can form a flange 13 only on the outside in the radial direction in the opening end part of the raw material 2 by fitting a mandrel 12 inside the pipe-shaped part 2b of the raw material 2 by being plastically deformed by compressing the opening end part in the pipe-shaped part 2b of the raw material in the axial direction by a pressing roller 6, while rotating the raw material 2 around its axis.
NAKAO TAKESHI
JP2006167740A | 2006-06-29 | |||
JP2010099729A | 2010-05-06 | |||
JPS5395156A | 1978-08-19 | |||
JP3078055U | 2001-06-22 | |||
JP2001259774A | 2001-09-25 | |||
JPH10146623A | 1998-06-02 |
US2310158A | 1943-02-02 |
Tsutomu Inoue
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