Wire drawing die and method of making the same

Details Wire drawing die and method of making the same Wire drawing die and method of making the same

B - Operations, Transporting

21

C

76/4, 205/42

B21C 3/02 (2006.01) B22D 19/10 (2006.01)

Patent

CA 1086261

WIRE DRAWING DIE AND METHOD OF MAKING THE SAME ABSTRACT OF THE DISCLOSURE A wire drawing die employing a polycrystalline aggregate of synthetic diamond includes a metal casing having flat, parallel front and back sides. A first, relatively shallow, annular cavity having a bottom wall is formed in the front casing side, and a second cylindrical cavity having a bottom wall is formed in the bottom wall of the first cavity concentric therewith and having a smaller diameter than the first cavity. A cylindrical metal plug having top and bottom ends is secured in the second casing cavity, the bottom end having a concentric cylindrical cavity formed therein having a bottom spaced from the top plug end. A cylindrical metal blank having opposite ends and a concentric core formed of polycrystalline aggregate of synthetic diamond is closely fitted in the plug cavity with one end engaging the bottom thereof and the other end engaging the second casing cavity bottom wall. The top end of the plug and the back side of the casing have concentric countersunk openings therein respectively extending therethrough to the core, and the core has a concentric die opening therethrough communicating between the countersunk openings. -1-

322012

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