Perforating device for aluminum block machining

The punching device for aluminum block machining comprises a base and a supporting frame, an air cylinder is fixedly arranged at the top end of the supporting frame, the output end of the air cylinder penetrates through the top end of the supporting frame and is fixedly connected with a movable plate, a motor is fixedly arranged at the bottom end of the movable plate, the output end of the motor is fixedly connected with a fixing seat, and the fixing seat is fixedly connected with the base. A connecting seat is arranged at the lower end of the fixing seat, a drill bit is fixedly connected to the end, away from the fixing seat, of the connecting seat, an inserting groove is formed in the bottom end of the fixing seat, and an inserting block matched with the inserting groove in a clamped mode is arranged at the upper end of the connecting seat. An inserting block of a connecting base at the upper end of a drill bit is inserted into an inserting groove in a fixing base, then a limiting pin is pressed to extrude