Integral axle housing forming method

Abstract

The invention discloses a forming method for a banjo axle housing. The forming method includes the following steps of (S1) blanking, (S2) extrusion of a shaft head, (S3) square pushing, (S4) manufacturing of a process groove, (S5) heating of a workpiece, (S6) radial expansion, (S7) shaping and (S8) upward resetting of a lower press sliding block and taking-out of the workpiece. According to the (S6), a wedge punch penetrates through a central hole of the lower press sliding block, pushes two radial expansion core molds to expand the radial direction of a workpiece central hole and axially squeezes the workpiece synchronously. According to the (S7), two axial shaping core molds are attached, the lower press sliding block moves downwards to enable the axial shaping core molds to be inserted into the position between two radial shaping core molds, an upper press sliding block moves downwards, and the wedge punch is inserted into the position between the two axial shaping core molds to shape the workpiece central hole and axially squeeze a hydraulic cylinder for axial limitation. The forming method integrates heat expansion and shaping, work procedures are reduced, a process chain is shortened, and the outline size accuracy is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of drive axles, more specifically, it relates to an integral axle housing forming method. Background technique [0002] The manufacturing method of the drive axle housing of the automobile mainly adopts the following methods at home and abroad: [0003] 1. Cast axle housing [0004] The cast axle housing adopts nodular cast iron or high-strength cast iron to integrally cast a central pipa-shaped opening shell and hollow tube body blanks with variable cross-sections on both sides. After it has been machined, its ends are pressed into the longer half-shaft sleeves and secured with bolts or pins. [0005] The characteristics of this type of manufacturing method are: [0006] (1) The rigidity of the axle housing is good, and the vibration damping performance is good. But the impact resistance and strength are poor. [0007] (2) Due to the high requirements for materials and heat treatment, the production ef...

AI Technical Summary

Problems solved by technology

[0039] The technical problems to be solved by the present invention are: in the manufacture of existing axle housings, the material utilization rate in the stamping welding technology and the overall thermal expansion technology is low, and the amount of machining is large; the production process chain of stamping welding is long, and the welding workload is large Moreover, the rigidity of the product is poor, and the service life is low; the size of the overall thermal expansion workpiece is unstable, the clamping is cumbersome, the production equipment is complicated, there are many production equipment, there are many tooling molds, and the problem of large investment. A kind of overall thermal expansion manufacturing of the automobile drive axle housing is provided. The method of forming and shaping integration in technology, to overcome the deficiencies in the prior art

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