Screw tap cylindrical grinding machine based on CBN grinding wheel

The utility model relates to a screw tap cylindrical grinding machine based on a CBN (Cubic Boron Nitride) grinding wheel, which comprises a base, a cross workbench is arranged at the central positionabove the base, a grinding head assembly is fixedly arranged on the base, and a tailstock and a workpiece main shaft assembly are respectively arranged at the top of the cross workbench in a slidingfit manner. The cross workbench comprises a longitudinal sliding table, a transverse sliding table and a rotating table, the lower end of the longitudinal sliding table is fixed to the base, the transverse sliding table is installed at the top of the longitudinal sliding table in a sliding fit mode, the rotating table is installed at the top of the transverse sliding table, and the rotating tablecan rotate in the horizontal plane relative to the transverse sliding table. The grinding head assembly comprises a grinding head base, a grinding head main shaft, a CBN grinding wheel and a grindinghead variable frequency moto