Automatic discharging trepanning drill

The utility model relates to the technical field of trepanning drills, in particular to an automatic unloading trepanning drill which comprises a cutter body, an elastic reset piece, a material pushing disc and a blade, one end of the cutter body is provided with a cavity, the elastic reset piece and the material pushing disc are located in the cavity, one end of the elastic reset piece is connected with the cutter body, the other end of the elastic reset piece is connected with the material pushing disc, and the blade is arranged in the cavity. And the blade is arranged on the cutter body on the outer side of the cavity. The elastic reset piece and the material pushing disc are arranged in the cavity of the cutter body, and after machining is completed, a material core is automatically withdrawn from the cavity, so that the machining efficiency is improved, and the labor intensity of operators is reduced; the cooling water channel is arranged to cool the cutter body and the blade, the abrasion loss of the bl