Metal deforming – By three or more coacting relatively movable tools – Yieldable face portion or auxiliary tool on tool-couple element
Patent
1989-02-24
1990-06-05
Crane, Daniel C.
Metal deforming
By three or more coacting relatively movable tools
Yieldable face portion or auxiliary tool on tool-couple element
72367, 72416, 72392, B21D 700
Patent
active
049303317
ABSTRACT:
An apparatus (10) and method for fabricating metal tubing of generally elliptical shape by cold pressing round tubing stock into the desired shape. The apparatus (10) includes a first pair of opposing dies (16 and 18) secured to the platens (12and 14) of a press for forming the substantially flattened sides of the tubing. A second pair of opposing dies, positioned substantially between and on either side of the first pair of dies, is provided for forming the substantially rounded sides of the elliptical tubing. Means (52) for providing a preselected rate of resistance to movement of the second pair of opposing dies as they are engaged by the substantially rounded sides of the tubing, such that the tubing can be pressed into the desired substantially elliptical shape defined by the die faces of the first and second pairs of opposing dies by operating the press to move the platens (12 and 14) toward one another, are provided.
REFERENCES:
patent: 408059 (1889-07-01), Wilmot
patent: 563797 (1896-07-01), Peters
patent: 1319837 (1919-10-01), Brinkman
patent: 2841865 (1958-07-01), Jackson
patent: 4467511 (1984-08-01), Collgon
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