| 摘要 |
The invention relates to a method for manufacturing ovalshaped metal tubes, where an essentially round-shaped metal tube is rolled both in the sideways direction and in the vertical direction of the tube, so that the metal tube (11) is rolled at least in two steps (2,4), and that between said rolling steps (2,4), the metal tube is rolled at least once in a direction that is perpendicular to the rolling direction of the rollng steps (2,4). In addition, the invention relates to an apparatus for manufacturing ovalshaped metal tubes. |
