Overall composite mechanical push rod type bulging process for car drive axle

The present invention discloses a monolithic composite mechanical pusher drive axle of an automobile bulging process, comprising the steps of: 1) the rear axle of the workpiece opening into the bulging outer mold; 2) will extend into the inner mold bulging bulging deformation of the bridge region of the workpiece housing; 3) bulging outer mold clamping, and mold bulging outer support mechanism is pressed against the transition surface between the bulging deformation zone packet Pipa axle housing and non-deformed region; 4) two hydraulic cylinders apply equal force to the mold bulging and bulging thrust parallel to the axial direction of the axle of the workpiece, the multi-stage secondary auxiliary hydraulic cylinder is applied perpendicular to the axial direction of the workpiece to the axle housing bulging mold force; bulging force is decomposed by the action of the link mechanism and a thrust perpendicular to the axial direction of the bulging piece axle housing and bulging vertical component parallel to the axial direction of the thrust of the workpiece parallel to the axle housing on the upper sub and lower modules force, the axle housing bulging force to the workpiece by the bulging thrust force vertical component and the auxiliary hydraulic pressure; 5) unloading the mold back.