Metal deforming – By use of tool acting during relative rotation between tool... – With metal deformation of different type
Patent
1985-02-25
1986-12-30
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
With metal deformation of different type
72 82, 72105, 72377, 29159R, 474170, B21D 5326, B21K 142
Patent
active
046319468
ABSTRACT:
A method of manufacturing precise sheet metal made poly-V pulleys with poly-V grooves, being uniform in thickness of peripheral wall and free of reduction of mechanical strength, by a step of preliminarily forming a lug in the peripheral wall of a cup-shaped blank and thickening the peripheral wall, a step of forming a plurality of V-grooves in a multiple arrangement on this thickened peripheral wall by pressing from both sides with a V-groove preliminary forming roller possessing a plurality of V-grooves forming ridges and a rotary inner die possessing a plurality of V-grooves while rotating the cup-shaped blank, and a step of pressing this peripheral wall with a plurality of V-grooves with a finishing roller. Furthermore, a method of manufacturing sheet metal made poly-V pulleys having advanced precision, by a step of preliminarily forming lugs and first grooves in the peripheral wall of a cup-shaped blank, and a step of thickening the peripheral wall.
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Kabushiki Kaisha Kanemitsu
Larson Lowell A.
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