Stamping forming machine for square nut

The utility model discloses a punch forming machine for square nuts, which comprises a machine body and a punching mechanism, the punching mechanism for punching square blanks is mounted in the machine body and comprises a hydraulic cylinder, a punching barrel, a punch, a spring, a lantern ring, an inclined rod and a clamping plate, and the punching barrel extending into the machine body is mounted at the power output end of the hydraulic cylinder. In the downward moving process of the punching cylinder, the bottoms of the clamping plates make contact with the surface of the bracket firstly, then the punching cylinder continues to drive the punch to move downwards, and in the downward moving process, the spring is compressed; in the moving process, the clamping plate makes contact with the side edge position of the square blank, the blank is positioned to the punching position of the top of the bracket before the punch makes contact with the blank, automatic positioning of the blank is achieved, and time and