| 摘要 |
PROBLEM TO BE SOLVED: To obtain an enlarged part having wider width and larger diameter than these of the enlarged part formable in the conventional method and to reduce the compression pressure acted to a shaft material. SOLUTION: In an enlarge-working method for shaft, with which a work is held with one pair of holding parts separated at a prescribed interval and at least the compression-pressure and the bending to the work between the holding parts and the rotation around the axis, are added to form the desirable enlarged part at the optional position in the work, this enlarge-working method has the peculiarity, in which the formation is applied while reducing the deformation resistance of the work by heating a part of the work at least between both holding parts. COPYRIGHT: (C)2005,JPO&NCIPI
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