The invention relates to a special
numerical control machine tool for milling an end face, drilling a center hole and lathing an outer circle of a thin and long
piston rod part of a special device in the filed of
petroleum, in particular to a special
numerical control machine tool for milling an end face, drilling a center hole and lathing an outer circle of a thin and long shaft part. The
machine tool comprises a main shaft box, a main shaft box base, a clamping and guiding device, a clamping and feeding device, material supporting frames and a
machine tool body. The main shaft box comprises three main shafts, namely the milling main shaft, the drilling main shaft and the lathing main shaft, and the main shaft box is supported on the main shaft box base which is connected with the
machine tool body below. The clamping and feeding device is connected with the clamping and guiding device, wherein the clamping and feeding device and the clamping and guiding device clamp a workpiece together and perform workpiece feeding, and the material frames only play a role in supporting parts. According to the
numerical control machine tool, three processes, namely milling the end face, drilling the center hole and lathing the outer circle of a thin and long shaft are finished through one-time clamping, the working efficiency is high, clamping, positioning, the feeding amount and the feeding speed are numerically controlled, the
machining precision is high, and the
rejection rate is low.