| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for friction welding to join metallic members by overlapping them and by plastically flowing them with the frictional heat generated by a rotary tool, which method and apparatus can prevent the lack or dispersion of the time necessary for softening and plastically flowing the metallic members due to the sticking of liquid substances, such as oil, water, etc., and as a result, does not cause the problems of the lack and dispersion of the joint strength by the friction welding. SOLUTION: Before the tip end of the pin portion 16c of the rotary tool 16 has descended and has come into contact with a first metallic member W1, air is blown from a blowing nozzle 65 on the joining portion P on the upper surface of the first metallic member W1 in order to reduce the amount of the oil O stuck to the joining portion P. COPYRIGHT: (C)2006,JPO&NCIPI
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