| 摘要 |
<p>The present invention relates to a welding machine (100) to weld a T-joint consisting of first and second welding target members (A, B), comprising: a rail (110) installed on a welding target member (A) making up a T-joint; a guide roller (120) to move up and down along the rail (110); a torch (130) for welding to be installed on the T-joint; and copper backing (140) installed on a welding part welded by the torch (130) to prevent the discharge of liquid weld metal from the welding part and solidify the liquid weld metal. According to the present invention, a T-joint can be welded by one-pass welding through an electrogas welding method, thereby significantly improving welding productivity. In addition to this, the present invention reduces a construction cost by eliminating a post-thermal treatment through an increase in heat input and reduces the inter-welding defects of multilayer welding.</p> |
