| 摘要 |
The thermal displacement of a structure can be lowered by buffering a temperature fluctuation of a heating medium with respect to a target control temperature to improve the machining accuracy. A machine tool (1) comprises a base (2), a column (3) provided upright on the base (2), a machining head (4), which is provided on the column (3), for mounting a tool (E) for machining a work (W), a work holding unit (5), on which the work (W) is placed, and a flow channel through which the heating medium is flowed. The machine tool (1) further comprises a heat exchanger plate (20), which is mounted on the outer periphery of at least one of the base (2) and the column (3) to keep the temperature of at least one of the base (2) and the column (3) at a given temperature, and a heating medium temperature controller (50) for controlling the temperature of the heating medium at a target control temperature. In the heat exchanger plate (20), a thermal conduction buffer (22) for buffering the fluctuation of the temperature of the heating medium with respect to the target control temperature is interposed between a flow channel (21c) and the above-mentioned outer periphery. |
