Friction stir processing apparatus with a vibrator

A friction stir processing apparatus comprising:

• a tool having a columnar tip-side part;
• a rotating unit configured to rotate the tool on a central axis;
• a first pressing unit configured to press a tip of the tool rotated by the rotating unit against a work;
• a jig having a tool insertion hole into which the tip-side part of the tool is inserted so that the tip-side part of the tool is encircled around the jig;
• a second pressing unit configured to slidably press the jig against the work;
• a press control unit configured to control the first pressing unit so that the tip-side part of the tool is gradually pulled out of the work by the first pressing unit while moving the tool and the jig relative to the work, in a state that the tool is rotated by the rotating unit and the tip of the tool has been sunk into the work to a predetermined depth by the first pressing unit;
• a vibrator configured to apply mechanical vibration to the jig in a direction of pressing the jig, wherein the vibrator has an oscillating frequency of about 20 Hz;
• and
• a vibration control unit configured to actuate the vibrator when the tool is rotated by the rotating unit, the tip of the tool has been sunk into the work to the predetermined depth by the first pressing unit, and the tool and the jig are moved relative to the work.