中文摘要：

在介绍了双丝旁路耦合电弧熔化极气体保护焊（双丝旁路耦合电弧（Double-electrode gas metal arc welding,DE-GMAW））高效焊接工艺原理的基础之上,采用双闭环反馈解耦智能控制系统,进行双丝旁路耦合电弧GMAW高速焊接工艺试验,测量双丝旁路耦合电弧GMAW母材热输入,分析双丝旁路耦合电弧GMAW高效焊接工艺机理,并对双丝旁路耦合电弧GMAW高效焊接工艺方法进行改进,进一步研究混合气体保护下的双丝旁路耦合电弧GMAW及其熔滴过渡行为,且开发出单电源双丝旁路耦合电弧GMAW。研究表明：采用双闭环反馈解耦智能控制系统使双丝旁路耦合电弧GMAW焊接过程稳定性更好、精确度更高且响应速度更快;旁路分流是实现高效焊接的同时降低母材热输入的关键;采用混合气体保护下的双丝旁路耦合电弧GMAW能进一步提高焊接过程稳定性,单电源双丝旁路耦合电弧GMAW能形成良好的焊缝成形,且设备成本低。

英文摘要：

On the basis of introducing the high effective double-electrode gas metal arc welding（DE-GMAW） procedure,used decoupling control system for the high-speed DE-GMAW test,measured the base metal＇s heat input of DE-GMAW,analyzed the technology and mechanism of DE-GMAW,and improved the DE-GMAW technology,further studied the mixed gas DE-GMAW and dripping transition behavior,and developed single power supply DE-GMAW. The results show that,using decoupling control system makes DE-GMAW welding process better stability,higher accuracy and faster response speed; bypass shunt is the key to realize the high efficiency welding and reduce the base metal＇s heat input; Using mixed gas can improve the stability of DE-GMAW,single power supply DE-GMAW formatted good weld and reduced the equipment cost.