外加纵向磁场对CO_2焊短路过渡频率的影响

Influence of External Longitudinal Magnetic Field on Frequency of Short-circuit Droplet Transfer in CO_2 Arc Welding

针对CO2气体保护焊熔滴短路过渡时飞溅大,短路过渡频率不稳定的特点,引入与焊枪同轴的直流外加纵向磁场对熔滴短路过渡过程进行控制。通过AH-XIX型汉诺威焊接质量分析仪对不同规范焊接参数和不同磁感应强度下施焊时电弧信号的采样,实验得出当磁感应强度在一定范围时,电弧信号稳定,短路频率十分均匀且偏高。讨论了外加纵向磁场改善电弧形态和熔滴短路过渡的受力方式对过渡频率的影响。

Aimed at large drop spatter and instable frequency of short-circuit droplet transfer in CO2 welding,the external longitudinal magnetic field was introduced to control the process of short-circuit droplet transfer. The arc signal of different welding parameters and magnetic intensity were collected by AH-XIX Hanover welding quality analyzer in gas metal arc welding process. The results show that the arc signal is stable and the short-circuit frequency is uniform and high when magnetic intensity in a certain ...