Forming method of tooth trace of gear
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United States of America Patent
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Aug 30, 2011
Grant Date -
Feb 2, 2006
app pub date -
Jul 12, 2005
filing date -
Jul 28, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A forming method of a tooth trace of a gear according to the present invention includes: a first step of preparing a preformed gear made of metal including a cylindrical main body and a tooth part having a flat tooth flank having a uniform thickness in a tooth trace direction inside of the main body; and a second step of conducting a surface treatment locally to an outside surface of the main body in order to deform the outside surface of the main body in such a manner that the same becomes concave, so that a crowning bulging in the tooth trace direction is formed on the tooth flank of the tooth part.
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