Method and apparatus for manufacturing tubes
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United States of America Patent
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May 17, 2005
Grant Date -
Jan 15, 2004
app pub date -
Dec 11, 2001
filing date -
Dec 20, 2000
priority date (Note) -
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status (Latency Note)
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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.
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