| 摘要 |
PROBLEM TO BE SOLVED: To provide a machine tool which compensates a diameter of an inner surface of a processed workpiece even when a tool is worn.SOLUTION: A machine tool 1 includes: a tool holder 50 which holds a tool 2, may rotate around a rotation axis r with the tool 2, and has a hollow space 54; a drive part 40 which supports the tool holder 50 so that the tool holder 50 may rotate and move relative to an inner surface 5a of a workpiece 5; a displacement gage 60 which is provided in the hollow space 54 of the tool holder 50, radiates a laser beam, and obtains information regarding a distance from the inner surface 5a of the workpiece 5 with the laser beam; and a control part 70 which controls the drive part 40 on the basis of the information regarding the distance from the inner surface 5a of the workpiece 5 that is obtained by the displacement gage 60 and thereby corrects the distance between the tool 2 and the inner surface 5a of the workpiece 5. |
