Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1977-01-26
1978-03-28
DiPalma, Victor A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
72105, 742308, 113116D, 228144, 228158, 228165, 228174, B21K 142
Patent
active
040807045
ABSTRACT:
A method of making a multi-V-grooved sheet metal pulley from a flat sheet metal strip. The strip is passed through forming rolls which preform a plurality of generally V-shaped, transversely spaced, longitudinally extending grooves in a portion of the strip, and a generally flat hub wall flange in a transversely adjacent second portion of the strip. The hub wall flange portion of the strip then is notched to preshape the flange prior to circular forming the bottom hub wall of a pulley therefrom. The preformed grooved and notched strip then is severed into individual strips, each of which provides the material for a cup-shaped sheet metal pulley. Each strip then is passed between a pair of wrapping rolls which form the strip into a circular, preferably cylindrical configuration with the strip ends located adjacent to each other. The adjacent ends of the strip then are abutted and welded together, forming a cup-shaped pulley. The grooved portion of the strip forms a generally cylindrically-shaped pulley cup side wall and the hub wall flange portion of the strip forms a circular hub bottom wall at one end of the cylindrical side wall, with the preformed strip grooves forming the pulley V-grooves. The outer V-grooved surface of the pulley cup side wall then is final sized and preferably polished by a rotating finishing roll which also removes any irregularities caused by the welding operation.
REFERENCES:
patent: 2730795 (1956-01-01), Bloss
patent: 2955748 (1960-10-01), Killian
patent: 3694898 (1972-10-01), Sato
patent: 3838485 (1974-10-01), Oldford
Blakesley Pulley Corporation
DiPalma Victor A.
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