金属加工（热加工）Issue(2)：23-29,33,8.
变厚截面材料激光穿透焊接自适应功率控制研究
The research on adaptive power control of laser penetration welding of materials with variable cross-section
摘要
Abstract
Laser welding of thick section plate is an effective measure to realize the lightweight of automobile,but in the process of laser welding,the penetration state of weld is inconsistent due to unstable process,and the welding quality of workpiece is poor.Because the laser power is easy to control and has a significant influence on the penetration depth,this paper designs the power control software and hardware system and completes the construction of the power control platform from the power control requirements in the laser welding process of the variable thickness cross-section plate.Convolutional neural network is used to classify the images of small holes obtained by coaxial image acquisition system,which are divided into incomplete penetration,moderate penetration and excessive penetration according to the area of the through holes,and PID control system is used to change the welding power in real time according to the classification results to obtain the moderate penetration state.Finally,the adaptive control experiment of laser welding power is carried out by using variable cross-section panel,and the weld with uniform back residual height is obtained,which verifies the effectiveness of the adaptive power monitoring and control algorithm.关键词
激光焊接/变厚截面材料/熔透状态/自适应功率控制Key words
laser welding/variable thickness cross-section material/penetration state/adaptive power control引用本文复制引用
周麒,张哲豪,李栋梁,罗耀恩,赵育泽,陈聪,曾宏玉,袁方..变厚截面材料激光穿透焊接自适应功率控制研究[J].金属加工（热加工）,2024,(2):23-29,33,8.基金项目
国家自然科学基金青年项目(52305356) （52305356）
国家自然科学基金面上项目(52275486). （52275486）
