Hydraulic press for integral compound bulging of automotive driving axle

Abstract

The invention discloses a hydraulic press for the integral compound bulging of an automatic driving axle. The hydraulic press comprises a hydraulic press body and a hydraulic bulging system. The hydraulic press body comprises a rack with a workbench. An internal bulging die and an external bulging die are arranged on the workbench. The internal bulging die comprises an upper module and a lower module. The external bulging die comprises an upper external die and a lower external die. An upper die cavity and a lower die cavity are formed on the upper and lower external dies respectively, and are shaped and structured like upper and lower outer sidewalls of a lute package of an axle housing. A left thrust hydraulic cylinder and a right thrust hydraulic cylinder are arranged at the two ends of the workbench respectively. The two ends of the upper and lower modules are hinged with piston rods of the left and right thrust hydraulic cylinders through link mechanisms respectively. At least one multi-stage hydraulic cylinder is arranged between the upper and lower modules. A lifting hydraulic cylinder acting on the upper external die is arranged above the workbench. A jacking hydraulic cylinder acting on the lower external die is arranged below the workbench. A quick disassembly connecting structure is arranged on the piston rod of the left or right thrust hydraulic cylinder.

Description

technical field [0001] The invention relates to a hydraulic press, in particular to a hydraulic press used for integral bulging processing 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 simple stru...

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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