Method of making a wire drawing die

Details Method of making a wire drawing die Method of making a wire drawing die

1979-03-08

1980-12-30

Simpson, Othell M.

Metal tools and implements, making

Blank or process

Die

72467, B21K 520

Patent

active

042416256

ABSTRACT:
A metal casing is provided having flat, parallel front and back sides. A first cylindrical cavity having a bottom wall is formed in the front casing side. A cylindrical metal plug having top and bottom ends is secured by heat shrinking in the first casing cavity, the bottom end having a second, concentric cylindrical cavity formed therein and engaging the bottom wall of the cavity. A cylindrical metal blank having opposite ends and a concentric core formed of a synthetic hard, wear-resistant material, such as polycrystalline aggregate of synthetic or natural diamond or polycrystalline cubic boron nitride, is secured in the second cavity by heat shrinking with one end engaging the bottom thereof and the other end engaging the first 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 formed therethrough communicating between the countersunk openings.

REFERENCES:
patent: 2171323 (1939-08-01), Wyland
patent: 3831428 (1974-08-01), Wentorf, Jr. et al.
patent: 4144739 (1979-03-01), Corbin

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