Forming method for manufacturing integrated rear axle housing part

Abstract

The invention discloses a forming method for manufacturing an integrated rear axle housing part. Manufacturing equipment for part forming comprises a pipe end preforming device, a part pre-bulging device and a part final forming device. The forming method comprises the following steps of pipe end preforming, part pre-bulging and part final forming, the end of a pipe blank is preformed into a conical surface at first, then, the pipe blank of which the end is a conical surface is subjected to pre-bulging and final forming, and the integrated rear axle housing part is obtained. According to the forming method, the integrated rear axle housing is manufactured through a hydraulic forming technology method, the strength of the integrated rear axle housing part is good, in addition, influence ofspringback is eliminated, and the part shape accuracy is ensured; and due to the fact that the integrated rear axle housing is integrally formed, the material utilization rate is increased, the part weight is lowered, no welding procedure is needed after forming, and oil leakage and other failures caused by welded seam cracking are avoided fundamentally. Meanwhile, no welded seam exists, thus, welding defects are avoided, in addition, deformation is sufficient, accordingly, the material is remarkably strengthened, and the strength of the part is improved.

Description

technical field [0001] The invention relates to the field of manufacturing automobile axle housing parts, in particular to a forming method for manufacturing integral rear axle housing parts. Background technique [0002] The traditional manufacturing process of automobile rear axle housing generally adopts integral casting or the method of stamping the upper and lower parts separately and then welding them into a whole. The disadvantage of the integral casting method is that the weight of the parts is too large, which is not conducive to the weight reduction of the car body and the reduction of fuel consumption; Defects are inevitable. At present, the common method is to use the whole steel plate to be cold stamped and then welded. In the manufacturing process of this method, the springback deformation of the parts is relatively large, and it is not easy to adjust. Cause failures such as fatigue cracking and oil leakage. [0003] The existing common method is to use the ...

AI Technical Summary

Problems solved by technology

[0008] (5) Shaping: After the parts are formed, a large springback occurs, resulting in poor precision of the mating surface and affecting the welding quality, so it is necessary to reshape the parts

[0011] 1. The yield of welding is low, the springback deformation of the parts is relatively large, it is necessary to increase the shaping process, the debugging cycle is long, the production quality of the parts is unstable, and the loading is affected;

[0012] 2. The dimensional accuracy of the weld area is not easy to guarantee, and welding defects are prone to appear when the weld is long, resulting in problems such as fatigue cracking and oil leakage, affecting car safety and user experience

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