激光打点对镀锌钢板激光飞行焊的影响研究

Study on influence of laser dot on laser flight welding of Galvanized Steel

文章以广汽菲克焊装车间为背景,介绍了激光飞行焊技术及镀锌钢板常见焊接缺陷与工艺优化措施。通过金相分析及配对T检验方法,验证预先激光打点工艺对车门激光飞行焊焊接缺陷的显著影响。试验结果表明,激光打点可以在95%置信区间减少(2.706,4.361)个焊接缺陷。T检验统计技术替代破坏性试验,通过对试验数据进行有效分析,在焊接工艺优化中得到越来越多的应用。

With the background of the body shop in GAC FIAT CHRYSLER Automobiles Co.,Ltd.,laser flight welding technology of galvanized steel plate and common welding defects and process optimization measures are introduced.By means of metallographic analysis and paired T test,the significant influence of pre-laser dot technology on the defects of laser flight welding was verified.The results show that the laser dot can reduce the welding defects(2.706,4.361)in 95%confidence interval.Instead of destructive test,t-test statistical technique has been used more and more in welding process optimization through effective analysis of test data.