The invention discloses a novel vertical
numerical control turning and
grinding composite
machine tool. The novel vertical
numerical control turning and
grinding composite
machine tool comprises a base and an
alternating current servo motor, wherein the top end of the base is provided with a
workbench, the upper surface of the base is provided with a stand column, the
alternating current servo motor is arranged on the outer side of a protective shell, the
tail end of a rotating shaft is connected with a coupler, the
tail end of the coupler is connected with a transmission lead screw, and the front side of a cross beam is sequentially provided with a
grinding tool rest and a turning tool rest from left to right. The novel vertical
numerical control turning and grinding composite
machine tool is convenient to install, can conveniently adjust the pretightening of an X-axis screw rod and a Z-axis screw rod, can increase the rigidity of the screw rods, saves the occupied area, improves theautomation degree, improves the depth of a ground inner hole, increases the range of the ground inner hole, reduces the vibration of a
grinding wheel in the
grinding process, accordingly improves thegrinding precision, has the characteristics of high positioning precision, stability, reliability, compact structure and the like and can ensure normal work of a spindle under the conditions of largecutting depth and large feeding.