| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a friction stir welding device which can easily and securely perform the friction stir welding of a fillet at a position along the join line of workpieces. <P>SOLUTION: A main axis positioning mechanism 1 is formed from an X-axis table 5, holding workpieces 3a and 3b for fillet joining, and the Z-axis table 8 and Y-axis table 9 between a portal frame 6 and a main axis unit 7. The main axis unit 7 includes a friction stir welding tool 38 composed of a rotationally drivable probe 39 and a stationary type shoulder 40 whose lower edge part is made into a V shape by two workpiece contact faces. A load cell 44 is installed between the nut member 36 of the ball screw direct acting mechanism 31 of the Y-axis table 9 and a Y-axis table body 30. When friction stir welding is performed, the change of the contact pressure between the stationary type shoulder 40 and the workpieces 3a, 3b detected by the load cell 44 is monitored by a controller 45, a command is given to the servo motor 35 of the Y-axis table 9 so that a changed amount is made into zero when the contact pressure is changed, and the positional relation between the stationary type shoulder 40 and the workpieces 3a, 3b is held unchanged. <P>COPYRIGHT: (C)2013,JPO&INPIT |
