摘要
本文针对小电流TIG 焊时,电弧漂移稳定性差问题,用外加横向磁场控制电弧进行了研究,观察外加磁场频率(0～10kH_2)对电弧形态的影响。外加低频磁场时,电弧与外加磁场同步摆动.电弧形态扩展;外加中频磁场对电弧有较强的镇定作用;外加高频磁场对电弧有明显的压缩作用,使电弧挺度增大,电弧能量密度及电弧电压数值增加。提高控制磁场强度.会加剧上述现象。焊接工艺实验结果表明,利用合理的交变磁场,能抑制电弧的漂移现象提高电弧的稳定性,明显地改善了薄板焊接工艺性能及焊缝成形。
In this paper,the problems of arc wandering and instability have beenstudied with extra transversal magnetic field for low current TIG welding.Theinfluence of extra magnetic field frequency(0～10kHz)on the arc appeara-nce has been observed.The arc swing is in synchronism with magnetic fie-ld in low frequency,so the arc appearance is expanded.The arc is calmedin medium frequency,and is compressed in high frequency,thus increasingthe arc energy density,the arc stiffness and the arc voltage.When otherconditions remain unchanged,with increased intensity of magnetic field thesaid phenomena are intensified accordingly.Experiment results of weldingthin sheet indicate that by using magnetic field to control the arc,thewandering of arc can be restrained and the arc stability and shape improvedmarkedly.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1990年第1期43-49,共7页
Transactions of The China Welding Institution
