Apparatus for deep rolling of recesses and radii of crankshaft journal bearings
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United States of America Patent
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Dec 23, 2003
Grant Date -
Dec 19, 2002
app pub date -
May 28, 2002
filing date -
May 28, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus (5) for the deep rolling of recesses (4) and radii of crankshafts (1). The deep rolling is accomplished with the aid of deep-rolling rollers (8) which, during revolution of the crankshaft (1), penetrate into the recesses (4) or radii of the crankshaft (1) under application of a deep-rolling force and at an angle of approximately 35.degree. and bring about a deformation in the crankshaft (1) itself. According to the invention, the depth of penetration of the deep-rolling rollers (8) in the crankshaft (1) is measured in the radial direction and the magnitude of the deep-rolling force is regulated as a function of the measured penetration depth in such a fashion that in the course of at least one revolution of the crankshaft (1) a plastic deformation corresponding to a predefined rolling depth is obtained at least at one of the two recesses (4) or radii of a relevant journal bearing (2) after the deep rolling.
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