Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1974-09-25
1976-05-04
Mehr, Milton S.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72103, 72102, 72469, B21H 102, B21H 714
Patent
active
039539962
ABSTRACT:
By forming a plurality of substantially parallel grooves in the peripheral surface of a cylindrical spark wheel blank, and then rolling the grooved spark wheel blank between at least two cooperating dies, an inexpensive, unique spark wheel is rapidly and efficiently formed having a multitude of ramp top surfaces terminating in raised sharp cutting edges and burrs throughout its outer peripheral surface. The spark wheel blank must rotate between the dies sufficiently to impart the desired abrasive characterisic to the spark wheel surface. The dies employed in the process of this invention must incorporate either a plurality of cutting edges which are spaced closely enough to prevent the spark wheel from bottoming out on the die during the rolling step or relief channels at the base of each cutting surface which prevent destruction of the abrasive spark wheel surface.
REFERENCES:
patent: 368688 (1887-08-01), Rogers
patent: 446739 (1891-02-01), Jones
patent: 2232336 (1941-02-01), Meersteiner
patent: 2232337 (1941-02-01), Meersteiner
patent: 2293930 (1942-08-01), Braedel
patent: 3039334 (1962-06-01), Kohler
patent: 3602027 (1971-08-01), Klug
patent: 3742753 (1973-07-01), Biesenbach
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