Automatic drilling device for hardware circular flange workpiece

The utility model discloses an automatic drilling device for a hardware round flange workpiece, which comprises a working table, the inner surface of the working table is connected with positioning blocks in a sliding manner, the outer surfaces of the positioning blocks are fixedly connected with friction pads, the positioning blocks are arranged in multiple groups, the multiple groups of positioning blocks are elastically connected through reset springs, and the friction pads are fixedly connected with the friction pads. When the automatic drilling device for the hardware round flange workpiece is used, a flange piece to be machined needs to be placed in the center of the workbench, at the moment, the air cylinder can be started, when the air cylinder is started, the conical block is driven through transmission to push the positioning block, and when the positioning block is completely opened, the external flange piece can be positioned; when the flange piece is machined, the conical block cannot continue to