Automobile drive axle integral combination external driving type bulging device

An automobile drive axle integral combination external driving type bulging device comprises a bulging inner die, a bulging outer die and an external driving type bulging force generating device for exerting bulging force on the bulging inner die. The external driving type bulging force generating device comprises pressure generating devices and thrust generating devices. The pressure generating devices are arranged at opening positions on two sides of an axle housing symmetrically and used for exerting pressure on an upper module and a lower module, and the direction of the pressure is perpendicular to the axial direction of an axle housing workpiece. The thrust generating devices are two thrust devices arranged at two ends of the bulging inner die, the two thrust devices exert opposite thrust parallel to the axial direction of the axle housing workpiece on the bulging inner die through a link mechanism. The bulging inner die comprises an upper module and a lower module, the upper module and the lower module are matched with an upper inner wall and an outer inner wall of an axle housing lute-shaped bag. Two ends of the upper module and two ends of the lower module are hinged to the thrust generating devices through link mechanisms. The bulging outer die is provided with a supporting mechanism for pressing a transition face between a bulging deforming area and a non-deforming area of the axle housing lute-shaped bag.