Rear positioning device of combined type high-precision adjustable numerical control lathe

The utility model relates to the technical field of numerical control lathe positioning, in particular to a combined type high-precision adjustable rear positioning device of a numerical control lathe, which comprises a positioning rod, one end of the positioning rod is detachably connected with a positioning block coaxial with the positioning rod, the end face of the other end of the positioning rod is provided with a center hole, and the center hole is coaxially sleeved with an adjusting rod matched with the center hole. A plurality of positioning grooves at equal intervals are formed in the rod body of the adjusting rod in the axial direction of the adjusting rod, the outer end of the adjusting rod extends out of the center hole, a threaded part is arranged on the rod body at the outer end of the adjusting rod, and the threaded part is in threaded connection with an adjusting nut. The function of rapidly adjusting the overall length of the positioning rod and the adjusting rod can be achieved through the a