电焊机2011，Vol.41Issue(11)：39-43,5.
轨道车辆用铝合金自动焊搭接接头裂纹研究
Study on welding cracks in automatic lap joint of aluminum alloy on railway vehicles
摘要
Abstract
Single-wire pulsed MIC welding test was used on 6005A Aluminum alloy lap joints with CLOOS special welding robot.The microstructure,welding heat inputting,stress were comprehensively analyzed for post-welding cracks universal occurred on the weld toe.Sysweld software was used to simulating welding heat,welding temperature field and stress field.Results of test and simulation showed that,welding heat inputting excessive and welding angle inconsequence,which induced part heat concentrated was the essential causes of cracks on 6005A Aluminum alloy lap joints.Assembly gap cause stress concentration was an important induced factor in welding cracks expanding and extension.Welding cracks were effectively controlled through optimizing welding parameter, adjusting welding angle and enhancing assembly effect,which assure the quality of production.关键词
焊接裂纹/热输入/应力/数值模拟Key words
welding cracks/heat inputting/stress/numerical simulation分类
矿业与冶金引用本文复制引用
刘春宁,唐衡郴,王陆钊,尹德猛,田忠利,褚宏宇..轨道车辆用铝合金自动焊搭接接头裂纹研究[J].电焊机,2011,41(11):39-43,5.基金项目
国家科技支撑计划资助项目(2009BAG12A04-B02) （2009BAG12A04-B02）
