Forced material returning mechanism of side flanging of punching die

The utility model discloses a forced material returning mechanism of a side flanging of a punching die. The forced material returning mechanism comprises a side flanging convex die and a material pressing plate, wherein the material pressing plate is arranged at the upper part of the side flanging convex die and is matched with the side flanging convex die; one side of the side flanging convex die is obliquely provided with a side flanging concave die, the bottom part of the side flanging concave die is provided with a limiting pin, a material returning block is arranged under the bottom part of the limiting pin, and a spring is arranged between the material returning block and the side flanging convex die. The forced material returning mechanism disclosed by the utility model has the advantages that the situation that a spring material returning mechanism avoids the side flanging concave die and ejects a negative-angle area of a component out of the side flanging convex die is realized by utilizing the time difference of a pressing machine sliding block stroke and a die stroke, the phenomenon that material discharging cannot be carried out by a negative-angle flanging is solved, a traditional wedge structure is not used by the side flanging convex die, the structure of the die is simplified, and the investment cost and the maintenance cost of the die are reduced.