Digital control machine tool vortex cutting knife rest static pressure rotation feeding support device

The utility model discloses a supporting device used for static-pressure turning and feeding of tool rest, which is applicable to perform cutting of thread whirling on CNC machine tool. Having advantages of large steady turning diameter of supporting part, long period of precision retaining ability due to pure liquid friction, small driving power of turning work piece and strong impact resistance, the utility mode aims to provide a connection of radial guide rail with high precision, high rigidity, pure liquid friction and super large diameter of shaft. Wherein, the utility model consists of an oil tank, a motor of booster pump, a booster pump, an overflow valve, a left bearing pad and a right bearing pad as well as an inner annular gear. Furthermore, the oil tank is arranged on the tool rest used for cutting of thread whirling on machine tool and oil filter for suction of oil is positioned inside the oil tank. Meanwhile, oil distributor is arranged on the oil tank and connected with a precision oil filter. A