| 摘要 |
PURPOSE:To stabilize the quality of a joint part and to improve its productivity by friction-welding first and second workpieces arranged on the welding axis center through a through hole provided to a third workpiece having a lower melting point than these workpieces. CONSTITUTION:The first and second workpieces 10 and 20 are arranged on the welding axis center and the friction welding is performed through the through hole provided to Al alloy casting 30, for instance, having the lower melting point than the workpieces 10 and 20. Since welding burrs can be infiltrated into the third workpiece 30 molten by the frictional heating, the strength of the joint can be stabilized and its productivity can be improved.
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