| 摘要 |
PURPOSE:To obtain a overlay welded long-sized material having the high dimensional accuracy, which scarcely has a bend and has no deflected wall, by drawing a base metal by a prescribed force and executing the overlay welding in a state at a tension is given, in case of performing continuously overlay welding on the surface of a long-sized base metal. CONSTITUTION:A welding jig supports chuck members 2, 3 which are installed to both ends of a long-sized member 1, so as to be freely rotatable by a stand 7, and gives the tension to the member 1 by using a tension device 9. At the time of executing the surface overlay welding of the member 1, a continuous welded bead formation is executed by using a welding torch 6, under a rotation control by a motor 4 in a state that said tension is given to the member 1. In this regard, when the member 1 is a hollow shape, overlay welding is executed in a water-cooled state by making cooling water pass through the inside. In this way, the overlay welded long-sized material having the high accuracy, which scarcely has a bend and has no deflected wall can be manufactured. |
