Influence of External Longitudinal Magnetic Field on Frequency of Short-circuit Droplet Transfer in CO_2 Arc Welding
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 range.The influence of arc form and force changed by external longitudinal magnetic field on short-circuit frequency are discussed .