Lower tool apron milling equipment

The lower tool apron milling equipment comprises a milling cutter assembly used for milling a workpiece and a clamp used for fixing and clamping the workpiece, the clamp comprises a base, a first driving part and a pressing part, the first driving part drives the base to move horizontally, and a positioning column matched with a center hole of the workpiece is arranged on the base; the pressing piece is used for pressing a workpiece installed on the positioning column on the base, the positioning piece comprises an air cylinder, a lifting seat and at least two positioning rods, the lifting seat is arranged on the base and located on the outer side of the clamp, the air cylinder is arranged on the lifting seat, and a piston rod of the air cylinder horizontally extends out in the moving direction parallel to or perpendicular to the base; the positioning rod is detachably arranged on the piston rod of the air cylinder, the end face, facing the clamp, of the positioning rod is vertically flush and used for abutti