Full-load-bearing passenger car frame weight lightening method based on high-strength steel

Abstract

The invention discloses a full-load-bearing passenger car frame weight lightening method based on high-strength steel. By the use of 700MPa high-strength steel products, combining a reasonable wall thickness replacement formula with a finite element simulation method, the yielding strength of the structure is effectively improved, frame mass reduction is achieved by thinning the wall thickness ofsquare pipes, the energy consumption of a whole vehicle is reduced, and the driving range of the whole vehicle is increased. Only the wall thickness of the square steel is changed, the size of the outer cross section of the square steel is not changed, the original structural design change is small, the method almost has no effect, the universality of steel structure is better, and the method is beneficial to mass production. Compared with aluminum alloy, the high-strength steel has better price and better processability, and the method is beneficial to reduce the cost of an adjusting production process. By means of simulation calculation of the stiffness sensitivity based on the wall thickness of the square steel, the weight is lightened in a targeted manner on the premise that the rigidity performance of the frame is ensured.

Description

Technical field: [0001] The invention relates to a method for reducing the weight of a passenger car, in particular to a method for reducing the weight of a full-load passenger car frame based on high-strength steel. Background technique: [0002] As a key core general-purpose technology in bus design, passenger car lightweight technology is conducive to achieving the important goals of reducing energy consumption, increasing driving range, and achieving energy saving and emission reduction; at the same time, it can enhance product competitiveness and improve the independent innovation ability of enterprises. Lightweight technology is of great significance to promote the development of new energy buses. Secondly, high-strength steel with a yield strength of 700MPa has been gradually applied in the passenger car industry. [0003] At present, the lightweight technology of passenger cars is mainly carried out in two aspects: structure and materials, and some progress has also...

AI Technical Summary

Problems solved by technology

This method is relatively reliable, but it uses a variety of special-shaped cross-section beams, which requires more types of raw material square steel, and has poor versatility; combined with the existing industrial structure, it is not conducive to mass production and application

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