Automobile drive axle overall compound bulging device

Abstract

The invention discloses an integral composite bulging device for an automobile drive axle, comprising a bulging inner mold, a bulging outer mold and a bulging force generating device for applying bulging force to the bulging inner mold; the bulging inner mold It includes an upper module and a lower module that cooperate with the inner walls of the upper and lower sides of the axle case respectively, and the two ends of the upper module and the lower module are hingedly connected by a connecting rod mechanism; A generating device, the pressure generating device is located between the upper module and the lower module and applies a pressure perpendicular to the axial direction of the axle housing workpiece to the upper module and the lower module, and the thrust generating device includes respectively located in the bulging inner mold There are two thrust devices at both ends, and the two thrust devices respectively apply thrusts facing and parallel to the axial direction of the axle housing workpiece to the bulging inner mold; The support mechanism on the transition surface between the deformed zone and the non-deformed zone.

Description

technical field [0001] The invention belongs to the technical field of mechanical forming, in particular to an integral composite bulging device for 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 simp...

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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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