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

205/32

B21C 1/02 (2006.01) B21C 3/02 (2006.01) B21C 3/18 (2006.01)

Patent

CA 1190187

ABSTRACT: "IMPROVED WIRE DRAWING DIE AND METHOD OF MAKING THE SAME" A wire drawing die and method of making the same is provided in which an irregular-shaped metal blank having a cylindrical core formed of a synthetic, hard, wear- resistant material is adhered to a circular metal plate having a central opening therein, the core of the blank being centered with respect to the opening in the plate. A metal die casing is provided having a cylindrical cavity therein, the cavity being proportioned to accom- modate the plate with a close fit. A first disc of brazing material is placed on the cavity bottom and the metal plate with the blank thereon is placed on the brazing material disc. A layer of metal powder is deposited in the cavity covering the metal plate and the blank. Another disc of brazing material is placed on the metal powder layer. A cylindrical metal plug is provided having an outside diameter proportioned to have a close fit with the casing cavity, the plug having a cavity formed in one end proportioned to accommodate the blank. The plug is inserted in the casing cavity and pressure is applied to the plug to compress the metal powder. Simultaneously, the plug and casing are heated to produce partial melting of the metal powder and complete melting of the brazing discs to form a body of consoli- dated metal encapsulating the die blank. The casing and plug are then cooled under pressure to solidify the metal body thereby to secure the plate, die blank and plug in the casing cavity. Countersunk openings are formed in the casing and the plug extending to the die core, and a die opening is drilled through the core communicating between the countersunk openings.

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