Machine tool
AssigneeCitizen Watch Co., Ltd.
InventorAyako KITAKAZE
Life of this patent
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Abstract
A machine tool includes a first spindle, a second spindle, and a joining means for joining the axial ends of workpieces gripped by the spindles to form a joined workpiece. The machine tool further includes an electric servomotor for moving the first spindle in the direction intersecting the axis of the first spindle, a current value detection means for detecting the current value of the electric servomotor, and a misalignment detecting means for detecting misalignment of a first workpiece and a second workpiece in the joined workpiece, based on the current value detected by the current value detection means when the joined workpiece gripped by the two spindles is rotated.
Claims7
A machine tool comprising:
- a first spindle for gripping a first workpiece:
- a second spindle for griping a second workpiece;
- and
- a joining means for by joining the axial end of each work gripped by each spindle to form a joined workpiece from the first workpiece and the second workpiece, characterized in that the machine tool further comprises:
- an electric servomotor for moving the first spindle in a direction intersecting the axis of the first spindle;
- a current value detecting means for detecting a current value of the electric servomotor;
- and
- a misalignment detecting means for detecting misalignment between the first workpiece and the second workpiece of the joined workpiece, based on the current value detected by the current value detecting means when the joined workpiece is gripped by both spindles and rotated by the first spindle or the second spindle.
Dependencies are inferred from the claim text.