Semi-sliding hydraulic bulging technology of automobile axle housing part and die thereof

Abstract

The invention discloses a semi-sliding hydraulic bulging technology of an automobile axle housing part and a die thereof. In the invention, the semi-sliding bulging die the body of which is composed of an upper fixed module and a lower fixed module (10,10') in the middle and a left sliding module and a right sliding module (6,6') is adopted to carry out twice hydraulic bulging shaping to a reduced pipe blank (11), wherein, after hydraulic bulging shaping at the first time, the middle of the pipe blank is saddle-shaped; and after being annealed, precise shaping is achieved by secondary hydraulic bulging shaping. The upper fixed module and the lower fixed module keep motionless in the process of bulging and are used for removing the parts after bulging. The left sliding module and the rightsliding module (6,6') adopt an integral structure (or are composed of parts of axial split dies) and are respectively connected with the left sliding module and the right sliding module of a three-dimensional hydraulic machine to perform horizontal movement. The cavity of the fixed module by secondary hydraulic bulging comprises the maximum cross section of a workpiece, and the cavity of the fixed module by first hydraulic bulging is designed according to the saddle-shaped bulging pipe blank. The technology replaces a casting method and a stamping welding method, simplifies manufacturing procedures, lowers cost by 20% and improves strength and rigidity of the workpiece by 30%.

Description

technical field [0001] The invention relates to a manufacturing process and mold for automobile axle housing parts, in particular to a semi-sliding hydraulic bulging process and mold for automobile axle housing parts. Background technique [0002] The axle housing of the automobile drive axle is a large-scale straight-axis pipe with complex cross-section, which requires high strength and rigidity. At present, such parts are mainly manufactured by casting method and stamping welding method. Casting parts have high strength and rigidity, and can cast different wall thicknesses, but they are heavy in quality and have many processing surfaces; stamped and welded parts are light in weight and high in productivity, but the material utilization rate is low, and it is difficult to achieve better performance with a single wall thickness Require. [0003] Combined with the shape characteristics and performance requirements of automobile axle housing parts, it is reasonable to select...

AI Technical Summary

Problems solved by technology

The fixed hydraulic bulging is adopted, the single bulging amount of the tube blank is small, and the tube wall thickness reduction is large; the general sliding type hydraulic bulging is used, the axial force effectively acts on the tube blank through the sliding mold, and the single bulging amount Large, but prone to cracks, wrinkles and other defects, and the equipment has a large tonnage

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