| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a welding method and welding equipment by which preliminary heating by seam welding is performed efficiently and also blowholes and pits hardly occur even when welding plated steel plates. <P>SOLUTION: A plurality of workpieces (1, 2) including at least one plated steel plate are superimposed and welded by using a laser beam welding mechanism (10) and a seam welding mechanism (20). When performing welding, the workpieces are preheated by supplying an electric current in the direction crossed orthogonally with a joined surface (3) to be welded of the plurality of the workpieces by the seam welding mechanism (10). Successively, after preheating the workpieces by the seam welding mechanism (10), laser beam welding is performed by emitting a laser beam so as to meet the joined surface by the laser beam welding mechanism. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
