Floating cylindrical mandrel and method for producing tubing

Details Floating cylindrical mandrel and method for producing tubing Floating cylindrical mandrel and method for producing tubing

1985-03-22

1987-04-07

Husar, Francis S.

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

72214, 279 1SJ, 279102, B21B 2100

Patent

active

046550682

ABSTRACT:
A method and apparatus for producing tubing from hollows or workpieces which are in the form of tubes having greater wall thickness than the finished tubes. The method is carried out upon a mill of the general type known as a McKay rocker. The mandrel is allowed to float in the hollow by being restrained at the rocker crosshead by friction rather than a positive locking device. The rocking is permitted with the mandrel sliding in the crosshead so as to reduce high tensile forces which could otherwise cause mandrel failure.

REFERENCES:
patent: 2925282 (1960-02-01), Borsetti
patent: 3570294 (1971-03-01), Shibata
patent: 4184352 (1980-01-01), Potapov et al.
patent: 4277073 (1981-07-01), Ferguson

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