Convex hull pneumatic device based on automobile aluminum plate blanking die

The utility model relates to the technical field of processing equipment, and discloses a convex hull pneumatic device based on an automobile aluminum plate blanking die, which comprises a die body, an air tank and an air cylinder, the air tank is fixed on the side wall of an upper die of the die body, the air cylinder is embedded in a press-fit surface of the upper die, the air tank is used for supplying air to the air cylinder, an impact pin is slidably mounted in the upper die, and the impact pin is fixed on the side wall of the upper die. The sliding direction of the impact pin is perpendicular to the pressing face of the upper die, a groove corresponding to the impact pin in position is formed in the pressing face of the lower die, and the air cylinder is used for driving the impact pin. The blanking die has the beneficial effects that when the blanking die is used for blanking, the convex hulls are machined at the allowance positions of blanks by striking the impact pins, and the convex hulls are proppe