窄间隙P-GMAW电弧行为分析

在窄间隙P-GMAW焊接中,电弧行为将直接影响焊缝成型效果,而侧壁和电流会影响电弧的形态。通过高速摄影技术分析窄间隙P-GMAW焊接中同一电流脉冲周期内不同时刻,以及同一摆动周期内不同电流脉冲周期的电弧形态变化情况,得出结论如下:(1)窄间隙摆动焊接中,电弧形态变化因素主要是脉冲电流的大小和焊枪与侧壁的距离;(2)由于电弧形态和熔滴过度相互影响,它们共同决定焊缝成型效果,因此电弧形态是决定焊接效果的重要因素。

Analysis of Narrow-gap P-GMAW Arc Behavior

In narrow gap P-GMAW welding, the arc behavior will directly affect the weld forming effect, while the sidewall and current will affect the shape of the arc. The changes of arc shape in the same current pulse period at different time and different current pulse cycles in the same oscillation period in narrow-gap P-GMAW welding are analyzed by high speed photography. The conclusions are as follows: firstly, in narrow gap swing welding, the factors of arc shape change are mainly the size of the pulse current and the distance between the welding torch and the side wall. Secondly, because arc shape and droplet over influence each other, they jointly determine the forming effect of weld, so arc shape is an important factor to determine the welding effect.