Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1983-09-19
1985-06-25
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72105, 29159R, B21D 5326
Patent
active
045245959
ABSTRACT:
An improvement in a method of manufacturing poly-V pulleys made of sheet metal, which is performed by subjecting a preformed cupshaped blank to working by a corrugating roller, an auxiliary forming roller and a finish forming roller. Prior to corrugation of the blank by the corrugating roller, a connecting portion between the peripheral wall and the bottom wall of the blank is pressed in a manner that the inside surface of the peripheral wall and the inside surface of the bottom wall are pressed into contact with each other, thereby to preform a lug which provides a side wall for grooves adjacent to the connecting portion.
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Kabushiki Kaisha Kanemitsu
Larson Lowell A.
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