Process for producing a camshaft
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United States of America Patent
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Aug 20, 1991
Issued Date -
N/A
app pub date -
Jan 29, 1990
filing date -
Oct 28, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a process for producing a camshaft provided with bearings and cams from a pipe or from a blank having an initial oval cam shape, the configuration of the camshaft with the cams and the bearings is molded into the pipe or hollow blank by swaging and circular kneading with tool segments. In a first step, a cam shape blank (9) is brought in the area of the bearings (13) to an at least approximately circular shape by forging or hammering of the camshaft in a pre-formation. Then in a second step the configuration of the camshaft with cams (16) and bearings (13) is molded by hammering a circular kneading with tools elements that at least partly surround the blank and exert radial compressive forces thereon while changing its initial shape and oval cross section.
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