Method and apparatus for manufacturing tubes
AssigneeOutokumpu Oyj
InventorMatti Leiponen
Life of this patent
Estimating the term…
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 (1) 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 (F1), the tube billet is subjected to at least a second working step (F2), and the tube billet (1) is maintained, at least during the first and second working step in non-oxidizing conditions. The invention also relates to an apparatus.
Claims25
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 a tube billet (1) is worked, so that mainly owing to deformation resistance, the temperature of the tube billet under operation rises up to the recrystallization range, at least on the working spot, characterized in that essentially immediately after the first working step (F1), the tube billet (1) is subjected to a second working step (F2), and that at least during the first and second working step, the tube billet (1) is kept in non-oxidizing conditions.
An apparatus for working a tube billet (1), said apparatus comprising a planetary arrangement including at least one roll element for performing the first working step (F1), characterized in that essentially immediately after the first rolling arrangement, in the proceeding direction (6) of the tube billet (1), there is arranged a second rolling arrangement in order to provide for at least one second working step (F2), and that there are provided means for creating non-oxidizing conditions, so that at least during the first and second rolling step (F1, F2) the tube billet (1) is kept in non-oxidizing conditions.
Dependencies are inferred from the claim text.