Numerical control milling machine for oil groove formed in cross shaft end face of universal joint

The utility model discloses a numerical control milling machine for an oil groove formed in a cross shaft end face of a universal joint. The numerical control milling machine comprises a bed body, wherein a longitudinal feed motor and a longitudinal feed screw are arranged on the bed body; a longitudinal sliding table is movably sleeved on the longitudinal feed screw; a milling head spindle seat is fixedly arranged on the upper end face of the longitudinal sliding table; a milling head spindle is arranged on the milling head spindle eat; a facing cutter is sleeved on the milling head spindle, and connected with a cutter drive motor; a workpiece clamping device and a workpiece rotating device are arranged below the facing cutter; a workpiece transition device is connected with the workpiece rotating device and connected with a workpiece lifting slide table and a lifting fed screw; the workpiece transition device is arranged on the bed body through a lifting gear; a numerical control operation screen and an ele