Continuous process for the production of very long precision tub

Details Continuous process for the production of very long precision tub Continuous process for the production of very long precision tub

1975-07-25

1977-02-08

Larson, Lowell A.

Metal deforming

By use of roller or roller-like tool-element

With non-roller metal deforming station

72283, B21B 1500

Patent

active

040066223

ABSTRACT:
A novel method and a novel apparatus for continuously forming a very long tube with precise internal and external dimensions from a metal tube blank by reducing the internal diameter of the blank to that of an internal mandrel on which the blank is telescoped, preferable by cold forming the blank onto the mandrel and immediately thereafter, drawing of the tube while it is still on the mandrel to its final external dimension; with no annealing taking place between the two steps.

REFERENCES:
patent: 3581384 (1971-06-01), Petersen et al.
patent: 3661005 (1972-05-01), Petersen et al.

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