摘要
试验搭建了双电弧集成冷丝复合焊系统,研究了不同电参数匹配下的焊接过程.结果表明,两熔化电极在直流模式下的熔滴过渡类型分为三种:短路过渡、短路+大滴过渡和大滴过渡.当电弧电压较低时,过渡类型为短路过渡;随着电压逐渐增加,过渡类型从短路过渡变为短路+大滴的混合型过渡,最终完全变为大滴过渡.其中短路过渡时焊接过程最稳定,飞溅最少,焊缝成形较好.大滴过渡次之,而短路+大滴混合型过渡时焊接过程稳定性及焊缝成形最差.此外,随着电弧电压的增加,熔滴的过渡频率呈先减小后增加的趋势.
Twin-arc integrated cold wire hybrid welding system has been established in the test,and the whole welding process at different preset voltages and currents was studied. The experimental results showed that when direct currents were supplied to two consumable electrodes,the metal transfer modes were divided into three types: short-circuiting transfer,short-circuiting transfer mixed globular transfer and globular transfer.When the arc voltage was relatively lower,the metal transfer mode was short-circuiting transfer. With continual increase of arc voltage, the transfer mode transformed from short-circuiting transfer to short-circuiting transfer mixed globular transfer,and changed into complete globular transfer eventually. Besides,among the three transfer modes,the short-circuiting transfer was characterized by most stable welding process,least welding spatters and best weld formation. The globular transfer mode came second. However,the mixed transfer mode possessed poorest welding stability and weld formation. Moreover,the metal transfer frequency decreased to a minimum value and then increased with the increase of arc voltage.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2017年第10期66-70,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51475325)
天津市应用基础与前沿技术研究计划资助项目(14JCYBJC19100)
关键词
双电弧集成冷丝复合焊
熔滴过渡
焊缝成形
熔滴过渡频率
twin-arc integrated cold wire hybrid welding
metal transfer
weld formation
metal transfer frequency
