SACTIG与VPTIG电弧稳定性的比较分析(一)  

Study on arc stability of SACTIG and VPTIG(Ⅰ)

作　　者：方臣富[1] 陈树君[1] 刘嘉[1] 殷树言[1] 宋永伦[1] 李桓[2] 侯润石[3] 温永平[4] 

机构地区：[1]北京工业大学机电学院,北京100022 [2]天津大学材料学院,天津300072 [3]清华大学机械系,北京100084 [4]江苏科技大学先进焊接技术省级重点实验室,江苏镇江212003

出　　处：《焊接学报》2005年第12期1-5,共5页Transactions of The China Welding Institution

基　　金：船舶行业国防预研基金项目;项目编号:98.J56.2.2(1);江苏省高新技术研究项目 项目编号:(2142X1C033)

摘　　要：采用高速录像系统、焊接电弧分析仪同步实时采集SACTIG(sine alternative cur-rent TIG)与VPTIG(variable polarity TIG)焊接电流、电弧电压、电弧形态信息。比较分析了SACTIG与VPTIG焊在焊接电流过零期间,焊接电弧稳定性与相关参数之间的关系。研究表明,工频正弦交流TIG电弧电流过零期间可能会发生熄弧和再引弧现象。焊接电流增加到一定值时,就可消除熄弧和再引弧现象,使工频正弦交流TIG电弧也具有良好的电弧稳定性。再引弧电压越高,电弧稳定性越差;再引弧电压等于电弧电压,就不会发生熄弧和再引弧现象。The welding current, arc voltage and shape of SACTIG and VPTIG welding were collected by high-speed camena system and welding arc analyzer. The relation betwenn welding are stabklity and associated parameters during the passing zreo time of SACTIG and VPTIG welding current was analyzed. The studied results indicated that (50Hz) SACTIG arc may go out and reignite during changing polarity. While welding current increase to a threshold the arc will not go out. The higher reignition voltage will caused the longer arc going out, so the arc stability becomes worse. If reignition voltage is equal to arc voltage, the arc will not go out.

关 键 词：SACTIG VPTIG 电弧 稳定性 

分 类 号：TG148[一般工业技术—材料科学与工程]