Spindle Thermal Precision Testing of Vertical Machining Center

Using capacitive displacement sensors and resistive temperature sensor for high-precision measuring vertical CNC machining center spindle drift,the radial and axial spindle thermal displacement and spindle temperature rise of heat-sensitive locations are obtained.For mechanical spindle,the high speed rolling friction of spindle bearings makes great caloric value,which seriously affect the thermal deformation of machine tool and its machining accuracy.For NC machine tool with stable structure and mature technology,the most effective measurement to improve the accuracy of NC machine tools thermal characteristic is to improve lubrication of machine tool spindle or forced cooling spindle bearings.