Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1976-05-28
1977-10-04
Gilden, Leon
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
29421R, 72 61, B21D 3908, B21D 2210
Patent
active
040517047
ABSTRACT:
A tubular ferrous blank, the starting material of the invention, set in a sectional forming die having a concave inner surface corresponding to a desired contour is subjected to the oil hydraulic bulge forming process in a press machine provided with a vertically movable ram and a pair of horizontally opposed movable rams to form two identical, but different oriented protuberant components in one embodiment of the invention, and one relatively big protuberant component and relatively small twin parallel protuberant components in another embodiment, each of the components being axis-asymmetrically formed, and again subjected to a mechanical bulge forming step by the aid of two opposed mandrels affixed to the horizontal rams inserted forcibly into the thus formed tubular blank to form a cut wave joggled design or pattern on the exterior surface of the tubular blank.
REFERENCES:
patent: 588804 (1897-08-01), Porish
patent: 2203868 (1940-06-01), Gray et al.
patent: 2375763 (1945-05-01), Blais
patent: 2770874 (1956-11-01), Lindow
patent: 3564886 (1971-02-01), Nakamura
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