Metal tools and implements – making – Blank or process – Die
Patent
1986-06-06
1987-11-03
Parker, Roscoe V.
Metal tools and implements, making
Blank or process
Die
B23P 1524, B21C 302
Patent
active
047036729
ABSTRACT:
A method of manufacturing a drawing die, in which a core of, for example, natural or synthetic diamond is clamped in the cavity intended for this purpose by deforming a tube which is made of, for example, a copper alloy to an annulus, the core being properly centered through the use of a rod-like member by means of which the core is pressed against the bottom of the cavity by a rod-like member having a pressure surface parallel to the bottom of the cavity during the deformation of the cylinder; in this way tilting of the core is precluded and it is not covered with material of the annulus in places where this is undesirable.
REFERENCES:
patent: 4392397 (1983-07-01), Engelfriet
Parker Roscoe V.
Spain Norman N.
U.S. Philips Corporation
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