| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating device for friction stir welding capable of shortening a time before starting of the friction stir welding, improving the controllability of a heating range and a heating temperature, and preventing cracks in a welding part regardless of the quality of a material. SOLUTION: The heating device for the method for friction stir welding is provided with induction heating sources 4 and 8 which are provided in forward and rearward directions of a probe 62 moving on a welding part 13 and move with the probe 62, a power source 12 for supplying electric power to the induction heating sources 4 and 8, and a temperature setting means 40 for setting the temperature of the welding part 13. A clearance is provided between the induction heating sources 4 and 8 and materials 1 and 2 to be welded. The induction heating sources 4 and 8 are heated at a set temperature set by the temperature setting means by the power source 12 when welded, and the welding part 13 in the forward and rearward in the moving direction of the prove 62 is heated by the induction heating sources 4 and 8.
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