Method and apparatus for forming metal pipes and tubes

Details Method and apparatus for forming metal pipes and tubes Method and apparatus for forming metal pipes and tubes

1981-02-20

1982-07-20

Combs, Ervin M.

Metal deforming

By deflecting successively-presented portions of work during...

By use of deflector arranged to bend work transversely of...

72181, B21D 512

Patent

active

043399380

ABSTRACT:
A flat skelp is longitudinally fed through convex and concave horizontal rolls, and is edge-crimped so that both edges are curved inward symmetrical to the pass line. The edge-crimped skelp is forced through a plurality of cage rolls disposed along and symmetrical to the pass line. The cage rolls perform intermediate forming that shapes mainly the uncrimped portion of the skelp toward a round form symmetrical to the pass line. The nearly rounded skelp is then subjected to finish-forming, with the fin of a finned-roll inserted in the gap between the edges. The edge-crimping process includes two or more stages; bending the outermost edges of the skelp and subsequent bending of the inward portion adjacent to the first bent edges.

REFERENCES:
patent: 2012796 (1935-08-01), Kurtze
patent: 3722248 (1973-03-01), Brunken
patent: 4142663 (1979-03-01), Blatnik et al.

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