Shaft diameter enlargement condition setting method, shaft diameter enlargement method and shaft diameter enlargement apparatus
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United States of America Patent
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Jan 31, 2023
Grant Date -
Sep 17, 2020
app pub date -
Oct 31, 2018
filing date -
Nov 1, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A method for setting conditions for a shaft diameter enlargement, a shaft diameter enlargement method, and a shaft diameter enlargement apparatus are provided. A controller of the shaft diameter enlargement apparatus controls a compressing section, a bending section, and a rotating section to enlarge an intermediate portion of a shaft workpiece to have a predetermined outer diameter by rotating the shaft workpiece about its axis with axial compressive force a bending angle being applied to the intermediate portion. The controller determines whether the shaft workpiece is acceptable, based on the number of rotations of die shaft workpiece required for enlarging the intermediate portion to have the predetermined outer diameter or based on an enlargement ratio of the intermediate portion.
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