| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve a yield and formability of a roof as well as to enable area enlargement of a closed cross section part of a body side by arranging a difference in steps to the outer side of a body side panel and conducting welding while maintaining a gap amount between the difference in steps and the flange part of the end part of a roof panel in welding. SOLUTION: A jig roller 21 maintaining a fixed height is set between a difference in steps and a flange part 4 and is preferably moved along advancement of welding. A pressing roller or a gap correcting roller 18 having a jig face is pressed on a roof (roof panel) 1 and a body side (body side panel) 4 so as to correct a gap amount, further, the flange part 4 is pressed to the jig roller 21. The roof 1 and the body side 2 are pressed/restricted by the pressing roller 18. While irradiating a laser beam 6 from a laser beam welding head 12 and moving a laser beam welding head 11, welding is conducted.</p> |
