| 摘要 |
PURPOSE: To support a rotary body holding a tool and a work piece at a high accuracy, by positioning a feeder hole at the main body side of the supporting frame of a stationary shaft, while positioning a return hole at the opposite side of the main body. CONSTITUTION: An operating oil is controlled at a set temperature, the room temperature±0.1 deg., for example, by a temperature control device 28, it is pressurized by a hydraulic pump 29, set at a specific pressure by a transformer valve 30, and fed to the stationary shaft 14. Feeder holes 23 and 24 the operating oil is flowing reversely to a return hole 26 at the opposite side of a column 12 to be a supporting frame have the adiabatic function to the heat transmitted from the return hole 26 to the column side. As a result, the asymmetrical electric heat amount to a slider or the column 12 is reduced, so as to reduce the thermal deformation of those members extensively. Consequently, the posture of the rotary body to hold the tool and the like can be supported at a high accuracy.
|
