Prediction of weld formation in 5083 aluminum alloy by twin-wire CMT welding based on deep learning

Abstract

Based on a large amount of experimental data from twin-wire CMT welding of 5083 aluminum alloy, deep neural network technology was adopted to analyze the welding process parameters and the weld dimensions, and a precise prediction model for the weld formation parameters was established. The results show that the key parameters influencing the prediction accuracy of the twin-wire CMT deep neural network model are the number of hidden layer neurons, the number of network training iterations, and the learning rate of the deep network. For a single factor, regardless of the weld width, weld penetration or weld reinforcement, the predicted value curve changes smoothly and without distortion from the measured value curve. The accuracy of the complex nonlinear model can be evaluated by linear regression analyses of the predicted data and the measured data. In addition, the deep neural network has the obvious advantages of high efficiency and precision due to its strong multi-dimensional nonlinear fitting abilities in the quantitative analysis of the arc welding system from the input welding parameters to the output weld dimensions. This model can provide data support and scientific reference for the process designs for 5083 aluminum alloy twin-wire CMT welding or additive manufacturing and the determination of the numerically calculated heat source size. Also, this model provides innovative ideas for the application of deep learning technology in the welding field.