Metal working – Means to assemble or disassemble – Means to assemble electrical device
Patent
1987-10-19
1989-03-07
Echols, P. W.
Metal working
Means to assemble or disassemble
Means to assemble electrical device
29596, 29598, 29609, 29738, 295642, 72327, B23P 1904
Patent
active
048094293
ABSTRACT:
A method and apparatus for manufacturing laminated assemblies having ridges formed on projections which interlock with recesses of adjacent laminations. The improvement to the laminated assembly is a projection with a smaller cross-sectional area than the recess and with a plurality of exterior longitudinal ridges protruding from the projection surface for securing adjacent laminations together by compressive interference fit between the ridges and the recess in interlocking relationship throughout the laminated assembly. An improvement in the method for the manufacture of a pack of metal laminae by use of a multistation progressive die operation on a strip of material, during the step of punching the recesses and simultaneously forming interlocking projections in a lower die, the improvement being forming the projection with a smaller cross-sectional area than the recess and with a plurality of exterior longitudinal ridges protruding from the projection surface for securing adjacent laminations together by compressive interference fit between the ridges and the wall of the recess. The projection is formed in a lower die of the multistation progressive die apparatus, wherein the lower die has a plurality of longitudinal grooves on the interior surface of the lower die to produce the ridges protruding from the circumferential surface of the projection simultaneously as the punch produces the recess in the upper portion of the plate.
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Carbet Corporation
Echols P. W.
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