Forming rolls of pipe-producing apparatus

Details Forming rolls of pipe-producing apparatus Forming rolls of pipe-producing apparatus

1982-01-25

1984-06-26

Crane, Daniel C.

Metal deforming

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

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

72180, 72 51, 29125, B21D 512

Patent

active

044558554

ABSTRACT:
Forming rolls of a tube-producing apparatus comprise an upper roll having two identical roll parts supported at spaced-apart positions on a roll shaft, each roll part having a rounded outer circumferential working surface which, as viewed in section taken along a plane passing through the rotational axis of the roll, has a rounded convex profile shape of mutually different inner and outer radii of curvature on inner and outer sides of the profile centerline perpendicular to the axis, the working surface portion of the outer radius operating cooperatively with the outer portion of a lower roll to form the lateral portion of a strip metal plate passed therebetween. Each upper roll part can be turned around in orientation on the roll shaft to place the working surface of the originally inner radius on the outer side, thereby changing the gap between the upper and lower rolls to suit the wall thickness of the tube being produced.

REFERENCES:
patent: 726691 (1903-04-01), Johnson
patent: 1377252 (1921-05-01), Hunker
patent: 2182842 (1939-12-01), Firth
patent: 3355922 (1967-12-01), Utashiro et al.
patent: 4269055 (1981-05-01), Sivachenko et al.
patent: 4317350 (1982-03-01), Sivachenko et al.

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