模具技术Issue(6)：43-50,8.
汽车后风挡下横梁热冲压工艺的二次成型研究
Study on secondary forming of rear windshield crossbeam
摘要
Abstract
In order to improve the secondary forming effect of the thermal stamping process of the rear windshield beam under the vehicle,a secondary forming method for the thermal stamping process of the rear windshield beam with the rapid nondominated sorting genetic algorithm Ⅱ(NSGA-Ⅱ)optimal gradient boosting decision tree(GBDT)is proposed.Firstly,the latin hypercube sampling technique is used to divide the process parameters of the rear windshield beam;then the mathematical proxy model is established through the GBDT algorithm;finally,the maximum thickening rate and the NSGA-Ⅱ multi-objective optimization algorithm.The experimental results show that the determination coefficient R2 of the maximum thickening rate and the maximum thinning rate of the GBDT model is 0.957 3 and 0.971 2,with a mean square error of 0.001 9 and 0.003 4,respectively.This shows that the model has a faster convergence rate and a high convergence accuracy.The test found that the maximum thickening rate and maximum thinning rate of the NSGA-Ⅱ multi-objective optimization algorithm were 3.5％and 6.41％,respectively,which were very close to the true value.Comprehensive analysis shows that the proposed method can realize the secondary forming optimization of hot stamping process,improve the secondary forming effect,has practical application significance.关键词
汽车后风挡/热冲压工艺/二次成型/梯度提升回归树(GBDT)/非支配排序遗传算法(NSGA-Ⅱ)Key words
automotive rear windshield/hot stamping process/secondary forming/gradient boosting decisisn tree(GBDT)/nsndominated sorting genetic al gorithm Ⅱ(NSGA-Ⅱ)分类
信息技术与安全科学引用本文复制引用
同晶..汽车后风挡下横梁热冲压工艺的二次成型研究[J].模具技术,2024,(6):43-50,8.基金项目
渭南职业技术学院校级科研课题(编号:WZYZ201710). （编号:WZYZ201710）
