Connecting plate punching equipment

The utility model discloses a connecting plate punching device, which belongs to the technical field of punching and comprises a punching base, a connecting plate is placed in the center of the top end of the punching base, a sliding groove is formed in the center of the top end of the punching base, screws are rotatably arranged at two ends of the sliding groove, two groups of movable sliding blocks are in threaded fit with the central symmetry of the screws, and clamping plates are mounted on the edges of the top ends of the movable sliding blocks. A punching frame is installed in the center of the top end of the punching base, a punching air cylinder is installed in the center of the top end of the punching frame, a piston rod in the punching air cylinder movably penetrates through the punching frame and is connected with a punching die, a bottom frame is installed in the center of the bottom end of the punching base, and supporting air cylinders are symmetrically installed on the two sides of the center o