Process optimization method of steel/aluminum laser welding brazing

Abstract

The invention discloses a process optimization method of steel / aluminum laser welding brazing. The process optimization method comprises the following steps of: simulating a steel / aluminum laser welding brazing process under specific conditions by virtue of software of finite element analysis; establishing a mapping relation between each process parameter and each fusion depth by virtue of an artificial neural network, and predicating the fusion depths under the different process parameters; and acquiring an ideal welding line fusion depth under the condition of comprehensively considering condensation and contraction of a welding line so as to obtain better process parameters. The process optimization method is applied to selection of the process parameters of the steel / aluminum laser welding brazing, has a certain guidance meaning on the selection of the process parameters of the steel / aluminum laser welding brazing in production practice by virtue of organic combination of computer stimulation and predication technologies, and can overcome the difficulty in the selection of the process parameters of the steel / aluminum laser welding brazing by experience and a lot of experiments so as to improve production efficiency and production quality and save production costs.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method for optimizing process parameters according to the performance requirements of steel / aluminum laser melting and brazing. Background technique [0002] Automobile lightweight has become the forefront and hotspot of automobile technology in the 21st century. The lightweight of the body plays an important role in the lightweight of the vehicle, and the steel / aluminum integrated body frame structure is a typical application of the combination of high-performance lightweight materials and optimized body structure. However, its application is still in its infancy. The shape of the molten pool plays a vital role in the quality of the weld in the steel / aluminum laser fusion brazing process. The penetration depth is one of the important parameters to measure the quality of the weld. However, each process parameter It has an extremely important influence on the penetration depth...

AI Technical Summary

Problems solved by technology

However, its application is still in its infancy. The shape of the molten pool plays a vital role in the quality of the weld in the steel / aluminum laser fusion brazing process. The penetration depth is one of the important parameters to measure the quality of the weld. However, each process parameter It has an extremely important influence on the penetration depth, but it is difficult to capture the shape of the molten pool, especially the penetration depth, during the steel / aluminum laser melting and brazing process. Therefore, when it comes to the process design and process optimization of steel / aluminum laser welding, The relationship between the process parameters and the penetration depth of the molten pool is rarely given, so it greatly increases the difficulty of formulating the steel / aluminum laser welding process

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