双丝旁路耦合电弧GMAW高效焊接工艺

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。

High Effective Double-electrode GMAW Procedure

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.