基于MATLAB的窄间隙焊缝质量建模研究
毕业论文关键词：窄间隙焊接；摇动电弧；焊缝成形；BP 神经网络；
MATLAB Abstract With more and more application of thick plate used in structure, narrow gap welding is widely used. The weld shape parameters affect the quality of the joint directly. Meanwhile, the narrow gap welding groove shape is special. Therefore, it is necessary to establish a kind of software which can rapid and simple predict the narrow gap weld shape. By studying the relationship between process parameters and the narrow gap weld shape welding, it can predict of the weld shape in advance. Then, it provides a new method to optimize the welding parameters, save welding cost and reduce unnecessary waste to. Based on the above situation, this project uses the BP neural network algorithm, by using MATLAB as the development platform, and establishes a model for the prediction of the shape parameters of the narrow gap weld section. Through the GUI internal, it designs of the man-machine interactive button operation interface. The prediction software mainly consists of "learning and training", "blocks of prediction application" two big functions, in which "learning training function block” can be used to establish the weld cross-section shape parameters and narrow gap welding the intrinsic relationship between process parameters. The "prediction application function” block is based on the "learning habits the function block”. According to the previous study of the relationship between the weld shape and narrow gap welding parameters, it can predict on the new process parameters. Experimental results show that the prediction model for narrow gap arc welding process, the realization of the visualization of the prediction results. When the shaking frequency in the 0.5~3.5Hz, shaking amplitude 75~115 degrees, the side wall of the residence time 40~100ms, error range of the predicted weld surface curvature and average penetration depth of side wall is within 10%.
Keywords: Narrow gap welding; Flux cored wire; Weld shape; BP algorithm; MATLAB
目录
第一章绪论.1
1.1窄间隙焊接的定义及特点...1
1.1.1窄间隙焊接的定义.1
1.1.2窄间隙焊接的特点.2
1.2窄间隙焊接技术的分类及应用...2
1.2.1窄间隙焊接分类...2
1.2.2窄间隙焊接应用...3
1.3摇动电弧窄间隙焊接系统构成...4