引言近年来,人们对气体保护电弧焊熔滴过渡的研究较多,取得了不少成果。但对低氢型焊条的熔滴过渡研究较少,通常是把它看作短路时间相同的规律性的短路过渡,用单一的或是平均的概念来研究这种短路过渡过程。事实上,它是一定焊接条件下受人为等因素影响的熔滴大小不均、短路时间不一的一种随机过程,因此 Introduction In recent years, there have been many researches on the droplet transfer of gas shielded arc welding, and many achievements have been made. However, there are few researches on the droplet transition of low hydrogen type electrode, which is usually regarded as the regular short-circuit transition with the same short-circuit time. The single-phase or average concept is used to study the short-circuit transition. In fact, it is a kind of stochastic process in which the droplet size is uneven and the short-circuit time is different due to the influence of man-made factors under certain welding conditions. Therefore,