抄録
The machining accuracy of the machine tool is not maintained constant level due to the thermal deformation of its component parts. To prevent the change in dimensional accuracy, it is important to prevent the heat transfer from the heat source. In this study, the thermal deformation of the CNC lathe machine caused by the heat generation from the spindle was analyzed. The analyzed thermal deformation was agreed with the measured result. By using the analyzed results, the oil that cooling the spindle was rapidly cooled to remove the heat generated from the spindle. It was confirmed that the change in the relative distance between the tool and the workpiece, that affected the dimensional accuracy of the machined workpiece directly, was reduced successfully by cooling the oil.
