Floating flange device of edge rolling forming die

The utility model discloses a floating flange device of an edge rolling forming die. The technical problems that in an existing robot edge rolling system mentioned in the background technology, a rolling wheel rolls along the outline of a vehicle body, if a forming die below the vehicle body is provided with a flange (a casting edge for preventing shifting), the rolling wheel and the flange interfere with each other, and if no flange exists, the vehicle body is prone to shifting under extrusion of a rolling head are solved. Adopted technical scheme, a floating flange device of an edge rolling forming die comprises a steel plate, an air cylinder and a check block, a shell of the air cylinder is fixed to one side plate face of the steel plate, the lower end of the check block is connected with the end of an air cylinder piston rod, two sliding grooves are formed in the check block, the check block is attached to the steel plate, pins are inserted into the two sliding grooves and fixed to the steel plate, and th