Influences of weaving parameters on dynamic characteristics and stability control of the droplet transfer in arc-weaving P-GMAW process

The dynamic characteristics of droplet transfer are extremely complicated with the combined effects gravity force and weaving motion during vertical-up welding on thick plate. In this paper, we firstly observed behavior under various parameters high-speed photography electrical signals pulsed gas metal arc (P-GMAW). Then, investigated influences different shape molten pool as well characteristics. By establishing a novel weaving-force model based state balance theory (SFBT), further revealed drop mechanism in P-GMAW process. Extensive experimental results demonstrated that suitable could effectively improve stability suppress defects including incomplete root penetration lack sidewall fusion. findings paper will provide basis for enhancing process obtaining high-quality weld joint.