Patent ID: 8578992

Claim:
A friction welding apparatus comprising: grasping devices respectively grasping two opposing workpieces in predetermined phases; a biasing device biasing the grasping devices toward each other; a servo motor driving a spindle equipped with one of the grasping devices; a clutch device engaged with the spindle in a specific phase; a stopping device making a linear movement while engaged with an end of a lever, the another end of the lever engaged with the clutch device, and the lever rocks, and the stopping device capable of being restored to regulate a stopping phase of the spindle; a damper device following the stopping device to offer resistance to the rotation of the spindle; and a stopping buffer device consisting of a pre-compressed laminated elastic member and constraining an operating end of the stopping device, wherein electricity is supplied to the servo motor and the spindle is rotated to thereby rotate one workpiece and in relation to another workpiece, the one workpiece and the another workpiece are brought into frictional contact with each other to soften a bonding interface between the two workpieces, thereafter a speed reduction is effected until the RPM of the spindle becomes a phase adjustment RPM, when the RPM of the spindle attains the phase adjustment RPM, the clutch device is engaged with the spindle, and the electricity supply to the servo motor is cut off to stop the rotation of the spindle.