摘要
用高速摄像系统及示波器对双丝间接电弧氩弧焊的熔滴过渡及电弧形态和电弧电压之间的关系进行了深入分析.结果表明,熔滴过渡和电弧电压、电弧形态的规律性变化存在密切的对应关系.熔滴形成、长大、脱离焊丝端部的规律性变化使极性斑点间距及弧柱电阻发生变化导致了电弧电压的波动,从而使电弧形态发生由暗到明、由小到大的规律性变化.随着焊接电流的增大熔滴的过渡形式发生变化,熔滴尺寸减小.不同的熔滴过渡形式其电弧电压的波动也有所不同,射流过渡电压波动较小,而短路过渡电弧电压的波动最大.
Relationship between metal transfer,arc shape and arc voltage was investigated with high speed camcorder system and digital oscillograph.Results show that metal transfer has a close relationship with arc voltage and the regular variation of arc shape.It shows that the regular changes of metal transfer make polarity spots spacing and arc beam resistance change and cause the arc voltage fluctuations,so that the arc shape changes regularly.Droplet transfer pattern changes and droplet size dereases with the increasing of welding current,different metal transfer mode has different arc voltage fluctuation,spraying transfer has lower variation of voltage but short transfer＇s arc voltage variation is bigger.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2012年第6期47-50,115,共4页
Transactions of The China Welding Institution
基金
山东省高校科技计划资助项目(J12LA53)
山东省自然科学基金青年基金资助项目(ZR2010EQ017)
山东省优秀中青年科学家科研奖励基金资助项目(BS2011CL032)
青岛经济技术开发区重点科技发展资助项目(2011-2-42)
