A forming method for manufacturing integral rear axle housing parts

Abstract

The invention discloses a forming method for manufacturing an integral rear axle housing part. The manufacturing equipment for forming the part includes a pipe end preforming device, a part pre-expanding device and a part final forming device. The forming method includes the following steps: Pipe end preforming, part pre-expansion and part final forming, firstly the end of the tube blank is preformed into a conical surface, and then the tube blank with the end of the conical surface undergoes pre-expansion and final forming steps to obtain the part. The invention adopts the hydraulic forming process to manufacture the integral rear axle housing, which not only has good strength of the parts, but also eliminates the influence of springback and ensures the accuracy of the shape of the parts. Since the axle housing is integrally formed, the material utilization rate is improved and the parts are reduced. Weight, there is no welding process after forming, which can fundamentally solve the failures such as oil leakage caused by weld cracking. At the same time, because there is no weld seam, welding defects are avoided, and because the deformation is sufficient, the material is significantly strengthened, and the strength of the part is also improved.

Description

Technical field [0001] The present invention relates to the field of automotive bridge shell parts manufacturing, and in particular, a forming method of manufacturing a monolithic rear bridge component. Background technique [0002] The traditional manufacturing process of the car rear bridge shell generally uses the overall casting or the upper and lower valves, respectively, and the welding is used as a whole. The disadvantage of the overall casting method is that the parts are large, which is not conducive to the weight loss of the body and the decrease in fuel consumption; the disadvantage of the upper and lower pampble components is the low-welded groove processing efficiency, the weld is long, the soldering parts are large, welding Defects are difficult to avoid. At present, there is also a method of re-welding after the entire steel plate reflecting. This method is in the manufacturing process, and the replacement of the parts is large, it is not easy to adjust, and the we...

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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