| 摘要 |
A machine tool is provided in which a movable member can be moved in an optimum state according to an axial traverse mode. A vertical machining center as the machine tool includes a column provided upright on a bed, a spindle head supported on a front face of the column, a saddle provided in front of the column on the bed, and a table provided on the saddle. The saddle and the table are respectively guided in their movement directions by hydrostatic slideways. When the saddle and the table are moved in a so-called cutting feed mode, pressurized oil is automatically supplied to the respective hydrostatic slideways at a lower pressure. When the saddle and the table are moved in a so-called rapid traverse mode, the pressurized oil is automatically supplied to the respective hydrostatic slideways at a higher pressure.
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