Study on Axial Oil Chamber Design for High Performance Hydrostatic Spindle
Ultra-precision machining and large-size equipments are themostprimary development trend ofcurrentmachine tooland hydrostatic products arekeytechnologiesof ultra-precision machining equipments. However, these equipmentsmostlyprocess miniature components, thus the adopted tools are relatively small and the spindlesare mainlybuilt-in types of HSK32-HSK25 withover30,000r. Some processing equipments are even equipped with hydrostatic or gas-static spindles. The studyextends theaxialoilchamberto radialonesto expand theaction areaofaxialoil pressureand form a closed oil seal edge by combining theradialclearance. Consequently, theaxialbearing stiffnesscan be enhancedtoenlarge the application scope of hydrostatic spindle. The designmodecan enhanceaxialstiffness ofspindle modulesor strengthenthe stiffness of hydrostatic spindlein a ball screw.