| 摘要 |
In a cylindrical grinding machine for grinding a rotating cylindrical workpiece with a rotating grinding wheel, a wheel spindle for supporting the grinding wheel is divided at its axial mid portion into first and second spindle components, and respective ends on the sides opposite to the axial mid portion of the first and second spindle components are rotatably supported by a pair of fluid bearings. Each of the first and second spindle components has at least at its portion supported by a corresponding one of the fluid bearings a diameter which is determined to secure a predetermined rigidity at a grinding point between the grinding wheel and the workpiece, based on a predetermined value obtained taking into consideration the power consumption by the fluid bearings or the quantity of energy consumption required from the beginning to the ending of a grinding operation. Thus, the grinding machine can be reduced in the energy consumed from the beginning to the ending of the grinding operation.
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