Method for making substantially forged articles such as tank tre

Details Method for making substantially forged articles such as tank tre Method for making substantially forged articles such as tank tre

1987-06-18

1989-07-18

Combs, E. Michael

Metal deforming

Process

Involving use of claimed apparatus

72356, 72357, 72377, B21D 2200, B21D 3100

Patent

active

048481297

ABSTRACT:
A billet (10) is pressed with a first blocking punch (36, 38). Thereafter, the billet is rotated approximately 90.degree.. A second punch (50) is pressed against the billet while a split ring die assembly (58) substantially surrounds the billet and constrains outward flow of the steel. The split ring die assembly includes projecting regions (64, 66) matingly received in recesses (14, 16) created by the first blocking punch. A finishing punch (90, 92) is pressed through the billet to complete formation of openings (94, 96). Preferably, a trimmer (100) removes any flashing from the finished billet.

REFERENCES:
patent: 94630 (1869-09-01), Morse
patent: 3340717 (1967-09-01), Korner et al.
patent: 3889512 (1975-06-01), Delio
patent: 4294101 (1981-10-01), Diemer et al.
patent: 4599804 (1985-12-01), Delio et al.

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