| 摘要 |
PROBLEM TO BE SOLVED: To perform satisfactory welding even when a gap between two members to be welded is large. SOLUTION: When a gap between two members is large, a filling material 250 is arranged. The position of the upper surface of the filling material 250 is the essentially same as the outer surface of a surface plate 131. The upper surface of a projecting part 117b is covered by welding beads with a rotary tool 200. Next, friction-stirring-welding is performed to the three parts of shapes 110, 130 and the filling material 250 by the rotary tool. The rotary tool has been entered inside the filling material 250. Consequently, even if the gap is wide, welding can be performed. |
