Method and apparatus for manufacturing tubes by rolling

Details Method and apparatus for manufacturing tubes by rolling Method and apparatus for manufacturing tubes by rolling

2005-07-26

2005-07-26

Tolan, Ed (Department: 3725)

Metal deforming

With exposure of work to gas, vapor, mist, or modified...

C072S096000, C072S098000

Reexamination Certificate

active

06920773

ABSTRACT:
A method for manufacturing a tube made of a non-ferrous material, particularly a tube made of mainly copper, by rolling, in which method, in the first working step the tube billet is worked by rolling with conical rolls, so that mainly owing to the deformation resistance, the temperature of the billet under operation rises up to the recrystallization range, at least on the spot that is being worked. Essentially immediately after the first working step, the tube billet is subjected to at least one second working step with a second set of conical rolls, in which case the tube billet is maintained, at least during the first working step and at least a second working step in non-oxidizing conditions. The invention also relates to an apparatus.

REFERENCES:
patent: 4318294 (1982-03-01), Yoshiwara et al.
patent: 4578974 (1986-04-01), Pozsgay et al.
patent: 4722209 (1988-02-01), Mankins
patent: 4727747 (1988-03-01), Naud et al.
patent: 4738128 (1988-04-01), Staat
patent: 4928507 (1990-05-01), Staat et al.
patent: 6651473 (2003-11-01), Roller
patent: 2929401 (1981-02-01), None

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