Method for producing a bevel gear shaft
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United States of America Patent
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Feb 9, 1999
Issued Date -
N/A
app pub date -
Jan 17, 1996
filing date -
May 21, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
A method for producing a bevel gear shaft, adaptable to produce a shaft having a desired recess shape, such as an involute spline, in the longitudinal direction. A blank, having a bevel gear portion complementary to an upper die and a shaft portion small enough to fit into a lower die, is utilized in the process. The product is formed to the shape of upper and lower dies held together in a press. An upper punch passes downward through the upper die and a lower punch passes upward through the lower die. The punches displace some of the raw material of the blank forcing it to bulge and take on the shape of the upper and lower dies. The bevel gear portion may be coined by the upper die simultaneously with the forging of the bevel gear shaft. The invention shortens production time, increases product strength, and improves product yield per unit weight of raw material.
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