Edge hemming machine for automobile door

The utility model discloses an edge hemming machine for an automobile door. The edge hemming machine comprises a press cutter, a cutter frame, a servomotor, a ball screw driving device, a main pre-hemming switch limiting mechanism, a linear guide track, an air cylinder, a main body framework, a connecting rod IV and a connecting rod V, wherein the linear guide track is mounted on a base plate through bolts; the main body framework is mounted in the linear guide track; and the air cylinder is mounted at one end of the main body framework. When the air cylinder expands, the air cylinder drives the main body framework to glide on the linear guide track, the press cutter is fixed on the cutter frame and comprises an inclined pre-hemming working surface and a horizontal main hemming working surface, and the air cylinder drives the pre-hemming switch limiting mechanism to control the automobile door or the pre-hemming working surface to be contacted with the main hemming working surface; and the cutter frame, the main body framework, the connecting rod IV and the connecting rod V form a parallel four-bar mechanism, the connecting rod IV and the connecting rod V are horizontally arranged, and the servomotor and the ball screw driving device drive the connecting rod V to drive the press cutter on the cutter frame to move.