| 摘要 |
[PROBLEMS] A work machine in which a tool attached to a tool holder performs highly accurate work. This is achieved by adapting the tool holder to be adjustable in the radial direction and by preventing a change in centrifugal force as much as possible. [MEANS FOR SOLVING PROBLEMS] An annular elastic holder part (24) having one end secured to the tool holder (20) and the other end forming an open end (24a) is attached to the tool holder (20). Two or more tools, such as semi-finishing blades (26a, 26b) and finishing blades (28a, 28b), are fitted to the open end (24a). A pressing mechanism (32) is installed in the tool holder (20), and the pressing mechanism (32) moves forward and backward in the axial direction of the tool holder (20) to press the annular elastic holder part (24), deforming the open end (24a) into an elliptic shape. When the opening end (24a) is deformed in the elliptic shape, the semi-finishing blades (26a, 26b) move radially inward and the finishing blades (28a, 28b) move radially outward. |
