Accurate central BTA numerical control device

The utility model relates to an accurate central BTA numerical control device, the upper portion of lathe is laid and is fixed with the base of the rail, the upper portion symmetry of the base of therail is provided with two finding activate rails, a spindle drum slides and sets up on the online rail, the middle part of a spindle drum is provided with the main shaft through bearing rotating, thefixed spindle motor that is provided with in upper portion of a spindle drum, spindle motor's output shaft passes through synchronous pulley and is connected with the outer end of main shaft, it is equipped with a support frame, no. Two support frames and a support frame to loop through the sliding sleeve slip cap on the bracing piece, being connected with the fixing base of two spinal branch vaulting poles is fixed, the fixed power -assist chuck that is provided with of opposite side of fixing base, one side of power -assist chuck is equipped with the spindle drum no. Two, the middle part ofno. Two spindle drums is th