B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
327/29
B23P 15/24 (2006.01) B23D 21/00 (2006.01)
Patent
CA 1065021
ABSTRACT OF THE DISCLOSURE A method of fabricating die jaw inserts for cutoff apparatus wherein said inserts are of the type comprising a hardened metal body terminating in an edge and having a clamping aperture opening to said edge and adapted to mate with a reversely similar insert to clamp a workpiece therebetween, the method comprising the steps of: fabricating a pair of reversely similar insert blanks which are machined to final dimensions and hardened beyond practicable machining but wherein said edges are uninterrupted by said aperture; placing said pair of reversely similar insert blanks on opposite sides of a shim strip such that the sides of the respective inserts which are to become the gripping surfaces of the workpiece abut the shim strip; and electrical discharge machining a circular bore symmetrical about the shim strip through the inserts and of sufficient diameter to cause the resultant bore to define circular arcs in the insert bodies whereby when said inserts are juxtaposed without said shim strip the reversely similar apertures of said bodies form an opening of slightly elliptic character.
249135
Alpha Industries
Na
LandOfFree
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