| 摘要 |
<p>The rail welding machine, in particular for the butt welding of railway rails (7a), has electrodes (11a, 11b) which are to be placed over a large area against the rails (7a) and are mounted in an articulated manner on their support (41a, 41b). The construction unit movable for feeding one of the rails (7a) is mounted in a pendulum manner in the feed direction. On account of their mobility, the electrodes (11a, 11b) can be snugly placed without problem over a large area onto the surface of the workpiece to be welded, here the railway rails (7a). This results in an approximately uniform current flow over the contact surface, as a result of which overheated contact points can be avoided. On account of the friction-free mounting, i.e. the pendulous suspension of the construction unit in the welding feed direction, an extremely accurate feed of one rail end and a feed force which can be proportioned exactly are possible during the welding operation. An excellent quality of butt weld can be achieved by the accurate control of the welding current, the feed force and the feed travel. <IMAGE></p> |
