工作機械の垂直案内運動機構 (第2報)

複合案内方式による案内運動精度の改善

抄録

The slide bearing guideway gives much greater frictional force than the rolling bearing guideway and the hydrostatic bearing guideway, and lowers the slide motion accuracy of the perpendicular guideway mechanism for the surface grinding machine. But when dynamic load is applied to the wheel head, frictional force absorbes vibration energy, and therefore, the slide bearing guideway is much more advantageous than other bearing guideway in improving the coupling stiffness. This paper proposed the composite bearing guideway mechanism. This mechanism has a feature that the conventional slide bearing guideway is used for the front side slide surface, and the hydrostatic bearing guideway is used at the opposite side. The new mechanism was solved to overcome the disadvantage of the slide bearing guideway. As a result, this slide motion accuracy showed a different aspect, with a load pressure at the slide bearing guideway side of 62.5 kPa as a boundary. At a load pressure of 62.5 kPa, the slide motion accuracy became 0.3 μm/40 mm within the limits of this experiment.