Bending die for automobile sheet metal machining

The utility model discloses a bending die for automobile sheet metal machining, and relates to the technical field of automobile dies. The die comprises a lower die holder, wherein a concave die is arranged on the surface of the lower die holder; side clamping seats are in sliding fit with two sides of the concave mold; extension rods sleeve the two end parts of the concave mold; first connecting rods are hinged to two sides of the end parts of the two extension rods; the other end of the connecting rod is hinged with the side clamping seat; cylinders are vertically fixed on the surface of the lower die base and are positioned at two end parts of the concave die; an upper die base is arranged at the piston rod end of the cylinder and at the top of the female die; second connecting rods are hinged to the two ends of the upper die base. The other ends of the two second connecting rods are hinged to the ends of the first connecting rods respectively. When the upper die moves downwards under the action of the air