METHOD FOR MANUFACTURING STEERING SHAFT OF STEERING DEVICE
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United States of America Patent
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Issued Date -
Jul 22, 2021
app pub date -
Jan 28, 2019
filing date -
Mar 12, 2018
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Abstract
A method for manufacturing a steering shaft of a steering device includes: a reduced-diameter section forming process in which a second-phase member is formed from a first-phase member by forming a reduced-diameter section in the first-phase member; and a ball screw groove forming process in which a third-phase member is formed from the second-phase member by forming a ball screw groove in the second-phase member by rolling.
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