Gear tooth smoothing and shaping process
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United States of America Patent
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-
Jan 9, 2001
Grant Date -
N/A
app pub date -
Mar 24, 1999
filing date -
Mar 24, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The fatigue life of gears, for example, the gears in a sun gear-planetary gear set, is markedly improved by forming the respective gears by ordinary manufacturing practices and then running each new gear against a durable, but expendable, dummy of its counter-gear. The teeth of a dummy sun gear may be suitably hardened and used under suitable loads to minimally reshape the teeth of a plurality of newly-made pinions so that they are smoothed and better fit an intended sun gear. Similarly, the roughened teeth of a hardened or hard coated sun gear can be smoothed by running it for a few rotations against an expendable pinion.
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