| 摘要 |
An apparatus ( 1 ) for manufacturing tubes made from thin-walled material, especially made from sheet metal, with a welding machine for longitudinal-seam welding, as well as with a clamping device ( 2 ), which has clamping jaws, which are arranged on opposite sides of the tube blank ( 3 ) and which can be pressed against the tube blank ( 3 ) for holding a tubular, preformed blank in the welding position. The clamping jaws ( 4 ) each have a stack of pressure plates ( 5 ), which contact each other on the flat sides thereof, and which contact the tube blank ( 3 ) on the narrow sides thereof in a contact region ( 6 ), and which can be pressed against the tube blank ( 3 ). The plate stacks are adapted to the outer contours of the tube blank ( 3 ) in the contact region ( 6 ). Through the use of the apparatus according to the invention, a uniform and uniformly load-bearing weld seam can be achieved, even for contoured tubes, which have outer diameters that vary along the course of their longitudinal extent.
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