Provided is a high-wall compact high-speed precision vertical
machining center. The high-wall compact high-speed precision vertical
machining center is characterized in that a lathe base is of a box type structure which is composed of three vertical walls and a base plate in a sealing connection mode, an X-direction feeding mechanism is arranged on the top of the rear vertical wall, a Y-direction feeding mechanism is arranged on the top of one side vertical wall, and a Z-direction feeding mechanism is also arranged on the top of the rear vertical wall; the high-wall compact high-speed precision vertical
machining center further comprises a B-axis and C-axis double-
pendulum workbench which is arranged in the space defined by the lathe base, and is provided with a circular
grating; center blind holes are formed in a lead screw of the X-direction feeding mechanism, a lead screw of the Y-direction feeding mechanism and a lead screw of the Z-direction feeding mechanism respectively, steel tubes are arranged in the center blind holes respectively, inner cavities of the steel tubes serve as liquid
inlet flow channels, and are communicated with cooling liquid inlets respectively, a liquid turning flow channel is formed by one end of each
steel tube and the blind end of the corresponding
blind hole, and a liquid outlet flow channel is formed between the outer wall of each
steel tube and the inner wall of the corresponding
blind hole, and is communicated with a cooling liquid outlet. According to the high-wall compact high-speed precision vertical machining center, the purposes that the lengths of overhanging portions of shafts of a lathe are small, the overall rigidity is good, accuracy is improved, and the speed of rapid movement is increased can be achieved.