| 摘要 |
PROBLEM TO BE SOLVED: To obtain good friction agitation joining in the case portions not requiring friction agitation joining partially coexist when plural joining lines are simultaneously subjected to friction agitation joining. SOLUTION: There are two joining lines and rotary tools 340A, 340B corresponding to the joining lines. The portions requiring to join two joining lines are simultaneously moved while having the two rotary tools inserted into a joining part. The rotary tool 340A is retreated from the joining part at the position P1 of a window 210 place, friction agitation joining is stopped. At a position P3, by moving the rotary tool 340B while gradually retreating the rotary tool 340B, joining is performed. At a position P4, by stopping the movement of the rotary tools 340A, 340B and retreating the rotary tool 340B, joining is stopped. Next, by inserting the rotary tools 340A, 340B, the movement is resumed. An inserting quantity of the rotary tool 340B is larger than the inserting quantity in the case of stopping the rotary toll movement. |
