Method for manufacturing toothed gears
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United States of America Patent
Stats
-
Oct 8, 1996
Grant Date -
N/A
app pub date -
Apr 18, 1995
filing date -
Apr 22, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A disc-shaped material is prepared by punching a high carbon steel plate or soft steel plate, and the disc-shaped material is fixed in position. An outer peripheral portion of the disc-shaped material is heated to a temperature of 400.degree.-500.degree. C. y means of a high frequency heater. The outer peripheral portion of the disc-shaped material is swaged to form a thickened portion by a swaging die and the thickened portion is then spun to plastically form a toothed gear to the outer peripheral portion of the disc-shaped material in two steps of coarse working and finish working by spinning dies. The thus formed toothed gear is further heated as occasion demands to a temperature of about 900.degree. C. for quenching.
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