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本文论述了常用的几种脉冲波形对TIG自动焊管子根部焊缝成形的影响及在仰焊部位产生内凹缺陷的根本原因。分析了改进后的高冲刺脉冲电流变化的规律和电弧特征以及克服仰焊内凹的原理。文章还介绍了工程应用情况。
This article discusses the commonly used several pulse waveform TIG automatic welded pipe root weld forming and the root causes of concave defects in the welding position. The rules of arc current and the arc current of the improved high dash pulse current and the principle of overcoming concave dashing were analyzed. The article also introduced the project application.