Flanging device for lens ring hole and forming method thereof

The invention discloses a flanging device of a lens ring hole and a forming method of the lens ring hole, and the flanging device of the lens ring hole comprises a base; the upper die assembly is provided with a punching punch, an inner hole flanging forming punch, an appearance punching punch and an outer ring flanging forming punch assembly. The punching punch is used for punching a lens ring hole in a material belt, the inner hole flanging forming punch is used for flanging the lens ring hole, the appearance punching punch is used for punching the appearance of a lens ring on the material belt, and the outer ring flanging forming punch assembly is used for flanging the lens ring. A punching punch, an inner hole flanging and forming punch, an appearance punching punch and an outer ring flanging and forming punch assembly in the upper die assembly can be used for continuously and sequentially punching a lens ring hole, flanging the lens ring hole, punching the appearance of a lens ring, and completing a lens