| 摘要 |
PROBLEM TO BE SOLVED: To provide friction stir welding technology by which the cost for removing a plating layer can be suppressed even when a plated steel sheet is a material to be joined.SOLUTION: As shown in Fig.(a), an aluminum alloy sheet 12 is superposed on a plated steel sheet 11 and a joining tool 22 is made to face the aluminum alloy sheet 12. As shown in Fig.(b), the pin 24 of the joining tool 22 which is rotated at high speed penetrates the aluminum alloy sheet 12 and the tip of the pin 24 reaches a removing part 14. As shown in Fig.(c), the joining tool 22 is moved along the surface of the aluminum alloy sheet 12 like a void arrow. Since the plating layer 16 does not exist in the removing part 14, excessive load is not applied to the pin 24. When removing the plating layer, the removed part is formed only on the starting point of joining. As compared with a case in which the plating layer is removed all over the entire length of a joining length, grinding cost required by removal is drastically reduced since the removal is performed locally in this case. |
