Method for producing threaded shaft for power steering device, and power steering device
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United States of America Patent
Stats
-
Oct 27, 2020
Grant Date -
Sep 27, 2018
app pub date -
Sep 26, 2016
filing date -
Oct 2, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a power steering device equipped with a rack shaft constructed by joining a first member having rack teeth and a second member serving as a ball screw shaft on which a ball screw groove is formed, a grinding process of the ball screw groove is performed on the second member by causing a grindstone to rotate and move along a rotation axis of the second member, while causing the second member to rotate about an axis of the second member as the rotation axis. The grinding process is performed so as to satisfy a specified machining condition “g/(5×p)
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