Overall composite bulging production process for car drive axle

Abstract

The invention relates to an overall composite bulging production process for a car drive axle. The process comprises the following steps of 1) blanking; 2) opening process holes; and 3) bulging. The bulging comprises the following steps that a, an axle shell workpiece is put into a bulging outer die; b, a bulging inner die extends to the bulging deforming area of the axle shell workpiece from an inner hole in one end of the axle shell workpiece; c, the bulging outer die is closed; d, thrust devices positioned at two ends of the bulging inner die are utilized to respectively apply equal thrust parallel to the axial direction of the axle shell workpiece to the bulging inner die; a pressure generating device is utilized to apply pressure vertical to the axial direction of the axle shell workpiece to an upper die block and a lower die block; the thrust is decomposed into thrust vertical-component acting on the upper die block and the lower die block and vertical to the axial direction of the axle shell workpiece and thrust parallel-component parallel to the axial direction of the axle shell workpiece under the action of a link mechanism, and the bulging force applied to the axle shell workpiece is resultant force of the bulging thrust vertical-component and the pressure; the axle shell workpiece is bulged and deformed under the action of the and bulging force; and e) unloading and die unloading are carried out.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to an integral composite bulging production 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...

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;

Images