| 摘要 |
PROBLEM TO BE SOLVED: To enhance productivity by forming a weld zone in which plural superposed parts formed on the end face of a weld joint are connected and alternately crossed and thereby laser-welding the superposed part in one welding operation. SOLUTION: While a laser welding machine 9 is moved along a welding line, it is also moved in the width direction of a weld joint 4 in the manner of continuously and alternately crossing a first and a second superposed part 6, 7 formed on the end face of the weld joint 4. Then, a laser beam is emitted from the laser welding machine 9, heating the end face of the weld joint 4 to form a weld zone 8. Thus, the superposed part is surely welded, with the formation of welding defects effectively eliminated. |
