Method of making shaft
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United States of America Patent
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May 22, 2018
Issued Date -
N/A
app pub date -
Aug 10, 2016
filing date -
Aug 20, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A method of making a shaft includes: forming a shaft portion by applying drawing to a first region, of a columnar material made of steel, extending from a predetermined position in an axial direction to an end on a first side in the axial direction, to form a shaft portion, and to form a tapered portion between the shaft portion and a second region, of the columnar material, extending from the predetermined position to an end of the columnar material on a second side in the axial direction, and having an outside diameter increased as the tapered portion extends from the shaft portion side toward the second region side; and forming a head portion by applying plastic forming to the second region and the tapered portion.
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