To provide a welding apparatus that is a self-travelling vehicle body type and that is small, advantageous in an installation space, and capable of reducing equipment cost, in a friction stir welding apparatus using a friction welding tool of horizontal position.
This friction stir welding apparatus includes: a self-travelling vehicle body 2 which is structured to be capable of self-travelling along a part 42 to be welded of the side walls 40a, 41a of workpieces 40, 41; a tool holding part 6 which freely rotatably holds a friction welding tool 3 around a reference axial line of a horizontal position; a servo motor which rotatably drives the tool holding part 6 around the reference axial line; an air cylinder which displaceably drives the tool holding part 6 along the reference axial line; and an adsorption pad 14 and a vacuum pump which generate a counter force F2 resisting the opposing force F1 of a thrust actuating on a weld zone 42 from the tool holding part 6 and the friction welding tool 3 by the air cylinder, and which generate a counter moment against an overturning moment actuating on the self-travelling vehicle body 2 by the opposing force F1 of the thrust.
COPYRIGHT: (C)2009,JPO&INPIT
Mitsuhiro Kamioka
Mitsuo Fujimoto
Nishida Hideto
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