| 摘要 |
A method and device are disclosed for producing tubes that are at least partially profiled on their interior and preferably on their exterior from a hollow cylindrical bland ( 3 ), using a mechanical cold forming method, wherein the end of the blank ( 3 ) that is not to be machined ( 3 ') is fed to a clamping device ( 10 ). The blank ( 3 ) is then secured in the clamping device ( 10 ) and a mandrel ( 2 ) is subsequently inserted into the end of region ( 3 ) of the blank ( 3 ) that is to be machined. A lance ( 8 ) is guided in the mandrel so that it can be coaxially displaced in a longitudinal direction and the free end of the lance ( 8 ') can be introduced into the clamping device ( 10 ). The tip ( 8 ') of the lance ( 8 ) is then brought into a positive fit with the clamping device ( 10 ) in the axial direction of the blank ( 3 ) and the mandrel ( 2 ), together with the clamping device ( 10 ) and the blank ( 3 ) is guided axially through a fixed machining point ( 6 ). Radial exterior machining of the surface of the blank ( 3 ) along the section that is to be machined ( 3 ') takes place at the machining point ( 6 ), to create the interior and exterior profiling of the blank ( 3 ). During the process, the mandrel ( 2 ) is preferably rotated about its axis in an intermittent manner.
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