Processing parameter optimization of fiber laser beam welding using an ensemble of metamodels and MOABC  

作　　者：Jianzhao WU Chaoyong ZHANG Kunlei LIAN Jiahao SUN Shuaikun ZHANG 

机构地区：[1]State Key Laboratory of Digital Manufacturing Equipment and Technology,Huazhong University of Science and Technology,Wuhan 430074,China [2]Department of Mechanical Engineering,National University of Singapore,Singapore 117575,Singapore [3]Walmart Global Technology,Walmart Inc.,Bentonville,AR 72712,USA

出　　处：《Frontiers of Mechanical Engineering》2022年第4期243-259,共17页机械工程前沿（英文版）

基　　金：supported by the Project of International Cooperation and Exchanges NSFC(Grant No.51861165202);the National Natural Science Foundation of China(Grant Nos.51575211,51705263,51805330);the 111 Project of China(Grant No.B16019).

摘　　要：In fiber laser beam welding(LBW),the selection of optimal processing parameters is challenging and plays a key role in improving the bead geometry and welding quality.This study proposes a multi-objective optimization framework by combining an ensemble of metamodels(EMs)with the multi-objective artificial bee colony algorithm(MOABC)to identify the optimal welding parameters.An inverse proportional weighting method that considers the leave-one-out prediction error is presented to construct EM,which incorporates the competitive strengths of three metamodels.EM constructs the correlation between processing parameters(laser power,welding speed,and distance defocus)and bead geometries(bead width,depth of penetration,neck width,and neck depth)with average errors of 10.95%,7.04%,7.63%,and 8.62%,respectively.On the basis of EM,MOABC is employed to approximate the Pareto front,and verification experiments show that the relative errors are less than 14.67%.Furthermore,the main effect and the interaction effect of processing parameters on bead geometries are studied.Results demonstrate that the proposed EM-MOABC is effective in guiding actual fiber LBW applications.

关 键 词：laser beam welding parameter optimization METAMODEL MULTI-OBJECTIVE 

分 类 号：TN24[电子电信—物理电子学]