Study for pulse frequency and number influence on welding joint of pulsed DE-GMAW

According to the problem of controlling the drop transfer and welding joint process of pulsed double electrode gas metal arc welding (pulsed DE-GMAW), based on high-speed camera hardware system and xPC rapid prototyping software system, the number of peak pulse and base pulse influencing on drop transfer and welding joint was analyzed. The results show that, with the number of peak pulse of double-pulsed bypass current increased, the free transfer number increased. When the number of base pulse of double-pulsed bypass current increased, the short circuiting transfer number increased. The number of times more of short circuiting transfer lead to the welding process unstable with much spatter. Based on that, therefore, the welding joints with good formation were obtained by controlling the drop transfer mode under the number of peak pulse and base pulse of double-pulsed bypass current was regulated.