Overall composite mechanical push rod type or inner high-pressure bulging device for car drive axle

Abstract

The invention relates to an overall composite mechanical push rod type or inner high-pressure bulging device for a car drive axle. The bulging device comprises a bulging inner die, a bulging outer die and two thrust hydraulic cylinders, wherein the bulging inner die comprises an upper die block and a lower die block, and a multi-stage auxiliary hydraulic cylinder is arranged between the upper die block and the lower die block. Two ends of the upper die block and the lower die block are respectively connected with the two thrust hydraulic cylinders through link mechanisms. The multi-stage auxiliary hydraulic cylinder comprises an auxiliary piston rod and at least two stages of auxiliary hydraulic cylinder bodies which are stacked and sheathed together and adopt a telescopic structure, and the auxiliary piston rod is sheathed onto the innermost layer of auxiliary hydraulic cylinder body. Oil ports connected with a hydraulic source are arranged on a rodless chamber, a piston rod chamber and a grading oil chamber of the multi-stage auxiliary hydraulic cylinder. The bulging outer die comprises a support mechanism positioned on a transitional surface between the bulging deforming area and the un-deforming area of an axle shell pipa bag. The piston rods of the two thrust hydraulic cylinders are oppositely arranged, and the axes of the two piston rods are positioned on the same one straight line. Moreover, a quick-detached connecting structure is arranged on the piston rod of one thrust hydraulic cylinder.

Description

technical field [0001] The invention belongs to the technical field of mechanical forming and processing, in particular to an integral composite mechanical push rod type or internal high pressure type bulging device of an automobile drive axle. Background technique [0002] The automobile manufacturing industry plays a pivotal role in my country's national economy. In recent years, my country's national economy has developed rapidly, and at the same time the automobile industry has also flourished. From the whole vehicle to the performance of the components, it has become the main subject of current industrial research, and the axle housing is one of the important parts of the automobile. The axle housing not only supports the automobile, but also serves as the differential and the final drive And the housing that drives the wheel drive. The quality of the automobile axle housing has a great influence on the performance of the vehicle. The axle housing not only needs to hav...

AI Technical Summary

Problems solved by technology

[0006] Disadvantages: It is difficult to control the forming flow, prone to cracks and pores, and the weight is large, the subsequent processing is complicated, and the welding process is prone to cracks and deformation;

[0010] Disadvantages: There are many processes, which are only suitable for the production of axle housings with simple geometric shapes, and the strength of the produced axle housings is low, and the cost is high; in addition, there are high requirements for welding, quality is difficult to guarantee, and cracks, deformations, and leaks are prone to occur. Defects, and the welding zone is prone to fatigue fracture;

[0014] Disadvantages: horizontal cracks are prone to occur at the longitudinal slit, uneven width of the flanging at the pipa bag, and easy wrinkling and straining on the side;

[0018] Disadvantages: the bulging force is difficult to control, the bulging mechanism and process are complicated, and cracks are easy to occur;

[0022] Disadvantages: The process is still immature, the requirements for high-pressure hydraulic sources are high, oil leakage and environmental pollution are easy, and the initial investment takes time and money;

[0026] 1. Most of the axle housing forming methods actually used in my country are casting forming process and stamping-welding forming process. Other forming methods are rarely used due to technical and economic reasons, or are in the research and experimental stage;

[0027] 2. The bulging force of mechanical bulging is difficult to control, the bulging mechanism and process are complicated, and cracks are easy to occur, but the blank utilization rate, production efficiency, and comprehensive mechanical properties are high;

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