Car auxiliary frame and forming method

Abstract

The invention relates to the machining field of car components, particularly to an auxiliary frame and a forming method thereof. The car auxiliary frame is formed by directly molding a uniform-wall-thickness cylindrical pipe and is of one piece. The forming method comprises the following steps: firstly selecting the uniform-thickness cylindrical pipe as a raw material, and then bending the round pipe to obtain an elbow pipe; then pre-molding the elbow pipe, hydraulically molding the pre-molded frame pipe, and finally cutting the end part of the formed frame to obtain a needed component. According to the auxiliary frame and the forming method, one round pipe is sequentially bent, pre-molded and hydraulically-molded to finally obtain the needed auxiliary frame. Compared with the auxiliary frame component manufactured in a traditional stamping welding way, the forming method has advantages of high production efficiency, fewer molds, light component weight, high strength and low comprehensive component cost; while the material cost is reduced, the light-weight requirement of vehicles can be realized, and the product competence can be improved.

Description

technical field [0001] The invention relates to the field of auto parts processing, in particular to a sub-frame and a forming method thereof. Background technique [0002] The subframe is the main part of the automobile chassis, which provides installation support for the engine and has an important impact on the comfort and safety of the vehicle. Traditional automobile subframes are produced by stamping and welding, that is, multiple sheet-shaped stamping parts are welded together. This method mainly has the disadvantages of many production processes, heavy parts weight, and high cost of parts. Using the traditional stamping welding method, generally a sub-frame part is usually welded by more than ten stamping parts, and each stamping part requires 2 to 4 processes for production. In the production process, each process needs to be stamped with an independent mold, and welding is performed after all parts are produced. The entire production process has many procedures, ...

AI Technical Summary

Problems solved by technology

The whole production process has many procedures, low production efficiency, large number of molds, and high mold cost

At the same time, due to the stamping-welding method, parts need to be preset for welding overlapping areas, which not only wastes materials, but also increases the weight of parts

Using welding to connect multiple stamping parts is not only inefficient in the actual production process, but also connects multiple parts together, and the overall strength, stiffness and fatigue performance of the produced subframe are poor

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