Double-cavity heading die

Details Double-cavity heading die Double-cavity heading die

2006-09-12

2006-09-12

Jones, David (Department: 3725)

Metal deforming

Tool and/or tool holder

Having unitary tool-face

C470S137000, C470S183000, C470S191000, C470S192000, C076S107100, C076S107400

Reexamination Certificate

active

07104109

ABSTRACT:
A cold or hot-forging heading die used in metalworking to form a “head” on the end of a metal rod is configured to provide two heading cavities formed in opposite ends of the carbide insert. The heading die of the invention comprises a hardened steel ring with a cylindrical carbide insert having a through bore with a first cavity machined concentrically with the bore in one end of the carbide insert. The die is then inverted and a second cavity formed in the opposite end of the insert. The second cavity can be identical to the first cavity or provide the shape for an alternate head configuration.

REFERENCES:
patent: 1449136 (1923-03-01), Yates
patent: 2544302 (1951-03-01), Duncan
patent: 2568440 (1951-09-01), Friedman
patent: 3169257 (1965-02-01), Loos et al.
patent: 3191204 (1965-06-01), McClellan et al.
patent: 3937053 (1976-02-01), Akamatsu
patent: 4094185 (1978-06-01), Wang

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