交流TIG电弧的过零过程及其状态特征  

Current-zero period process and its charcteristics of AC TIG arc

作　　者：胡坤平[1] 宋永伦[1] 夏源[1] 陈志翔[1] 

机构地区：[1]北京工业大学机电学院,北京100022

出　　处：《焊接学报》2006年第12期29-33,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50375005)

摘　　要：TIG电弧是焊接生产中的一种重要热源,交流TIG电弧在铝合金的焊接制造中的应用亦已相当广泛。但以往由于观测方法的限制,而缺乏对该类电弧物理特征的了解。基于新型的光谱诊断系统,并采用时控—统计平均的观测方法,对方波交流和正弦交流等两种常见的TIG电弧在近零和过零时的电子数密度的动态变化过程进行了测量,分析了交流电弧过零时段的一般规律和各自特点,从而有助于对交流TIG电弧过程认识的深入以及对其控制水平的提高。As an important heat source in welding,TIG arc is widely used in manufacturing industry,especially for aluminum alloy joining processes.But up to now,the knowledge concerning the alternative TIG arc during the period of the current traversing zero as well as its influence on welding process are not clear enough.Based on a modern ICCD spectral instrument and time-control statistic sampling method,the dynamic variations of electron density during the period were observed in alternative TIG welding arcs for both the square wave and sine wave. The general rules and the features of the arcs were analyzed and discussed.It may enhance the knowledge on the arc process and its control level.

关 键 词：交流TIG电弧 电弧近零和过零过程 电子数密度 光谱诊断 

分 类 号：TG115.28[金属学及工艺—物理冶金]