Punching device for flange production

The utility model discloses a punching device for flange production, which belongs to the field of punching devices and comprises a drilling machine body, a long drill bit is arranged at the output end of the drilling machine body, a drilling workbench is fixedly mounted on the drilling machine body, and a splash-proof device is arranged on the upper portion of the drilling workbench. A long drill bit descends along a drilling positioning opening of the splash-proof sleeve during drilling, the splash-proof sleeve is arranged outside a flange blank drilling part in a covering mode, the splash-proof effect on sweeps can be achieved, the trouble that the sweeps are scattered after being splashed is reduced, the safety performance of personnel standing around a drilling machine is enhanced, and through the arranged material pushing rotary disc and a collecting box, the working efficiency is improved. After the surface of the flange blank is drilled, waste chips generated by drilling fall into the storage groove o