Method and apparatus for manufacturing tubes

Details Method and apparatus for manufacturing tubes Method and apparatus for manufacturing tubes

2005-05-17

2005-05-17

Tolan, Ed (Department: 3725)

Metal deforming

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

C072S096000, C072S098000

Reexamination Certificate

active

06892559

ABSTRACT:
A method for manufacturing a tube made of a non-ferrous material, particularly a tube made of mainly copper, in which method, in the first working step the tube billet is worked so that mainly owing to the deformation resistance, the temperature of the tube 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 a second working step and the tube billet is maintained, at least during the first and 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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