| 摘要 |
A friction agitation joining tool ( 10 A, 10 B) includes a rotor ( 11 ) having an end portion to be pressed onto at least one of surfaces of joining members ( 11 a , 1 b) and a probe ( 13 ) to be inserted into a joining portion ( 3 ) of the joining-members ( 1 a , 1 b), wherein the probe ( 13 ) has a diameter smaller than a diameter of the rotor ( 11 ). An end face ( 12 ) of the end portion of the rotor ( 11 ) is formed into a concave surface dented from a periphery of the end face ( 12 ) toward a rotational center of the end face ( 12 ). The probe ( 13 ) is protruded from the rotational center of the end face ( 12 ). The end face ( 12 ) is provided with a spiral groove ( 15 ) or an annular groove ( 16 ) surrounding the probe ( 13 ). By performing the joining operation with the joining tool ( 10 A, 10 B), a joined member with a good joint can be obtained. |
