Integral compound bulging process for automotive driving axle

Abstract

The invention discloses an integral compound bulging process for an automotive driving axle. The process comprises the following steps of: 1) placing an opened axle housing workpiece into an external bulging mold; 2) extending the internal bulging mold into a bulged deformed area of the axle housing workpiece from an inner hole at one end of the axle housing workpiece; 3) closing the external bulging mold; 4) applying equal thrust parallel to the axial direction of the axle housing workpiece to the internal bulging mold by utilizing thrust devices at the two ends of the internal bulging mold respectively, and applying pressure perpendicular to the axial direction of the axle housing workpiece to an upper module and a lower module by utilizing a pressure generation device, wherein the thrust is decomposed into a perpendicular thrust component which acts on the upper and lower module and is perpendicular to the axial direction of the axle housing workpiece and a parallel thrust component parallel to the axial direction of the axle housing workpiece under the action of a link mechanism, bulging force on the axle housing workpiece is the resultant force of the perpendicular thrust component and the pressure, and the axle housing workpiece is bulged and deformed under the action of the bulging force; and 5) performing unloading and demolding.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, in particular to an overall composite bulging process 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 have sufficient strength, stiffness and fatigue life, but also has a si...

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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