Characteristics and arc stability of multi-arc morphology in multi-wire welding are significantly different from those of single-wire welding due to electromagnetic force. A triple-wire welding platform was established, and the influence of welding current and wire-to-wire distance on arc shape characteristics was quantitatively studied by using the triple-wire welding high-speed photographic system. The fluctuation values of arc shape parameters (arc height, arc area, and arc deflection) were used to evaluate arc stability. The results show that there is no obvious fluctuation in arc height, and its value is related to welding current, but independent of wire-to-wire distance. When the welding current is set at a high level, there are more molten pool metals, which cause the “submerged arc phenomenon”, and the height and area of the arc become smaller than those at a low level of welding current. In addition, the arc under the high current condition has a strong anti-interference ability. Therefore, the arc deflection is small, and the arc combustion is stable. The change of wire-to-wire distance has a more direct effect on the middle arc area than that of leading arc and trailing arc. Overall, the interference effect and deflection of arc decrease and the arc stability improves as the wire-to-wire distance increases.
MA Xiaoli, XU Chen, WANG Weicheng, HUA Xueming
. Impact of Welding Parameters on Arc Characteristics in
Triple-Wire Welding[J]. Journal of Shanghai Jiaotong University, 2020
, 54(7)
: 682
-687
.
DOI: 10.16183/j.cnki.jsjtu.2019.028
［1］马晓丽, 华学明, 吴毅雄. 高效焊接技术研究现状及进展［J］. 焊接, 2007(7): 27-31.
MA Xiaoli, HUA Xueming, WU Yixiong. Research status and progress of high efficiency welding technology［J］. Welding, 2007(7): 27-31.
［2］MA X L, HUA X M, WU Y X. Polarities effect on arc interference in triple-electrode CO2 fillet welding［J］. China Welding, 2012, 21(4): 15-19.
［3］KIRAN D V, CHO D W, SONG W H, et al. Arc behavior in two wire tandem submerged arc welding［J］. Journal of Materials Processing Technology, 2014, 214(8): 1546-1556.
［4］UEYAMA T, OHNAWA T, TANAKA M, et al. Effects of torch configuration and welding current on weld bead formation in high speed tandem pulsed gas metal arc welding of steel sheets［J］. Science and Technology of Welding and Joining, 2005, 10 (6): 750-759.
［5］向婷, 李桓, 杨立军, 等. 单电源三丝MIG 焊的交替燃弧特性［J］. 机械工程学报, 2015, 51(4): 84-89.
XIANG Ting, LI Huan, YANG Lijun, et al. Alternate arcing characteristics of the triple-wire MIG welding［J］. Journal of Mechanical Engineering, 2015, 51(4): 84-89.
［6］程力.PAW+缆式七丝焊丝MIG复合焊电弧耦合行为研究［D］. 镇江: 江苏科技大学, 2018.
CHENG Li. Study on arc coupling behavior of pulsed PAW+ cable type seven wire welding MIG composite welding［D］. Zhenjiang: Jiangsu University of Science and Technology, 2018.
［7］冬壮. 缆式焊丝TIG-MIG复合焊电弧行为及熔滴过渡研究［D］. 镇江: 江苏科技大学, 2018.
DONG Zhuang. Study on arc behavior and droplet transfer with cable-type welding wire in TIG-MIG composite welding［D］. Zhenjiang: Jiangsu University of Science and Technology, 2018.
［8］XU C, HUA X M, YE D J, et al. An improved si-mulation model for three-wire gas metal arc welding［J］. The International Journal of Advanced Manufacturing Technology, 2017, 90: 1447-1456.
［9］WU D S, HUA X M, YE D J, et al. Understanding of the weld pool convection in twin-wire GMAW process［J］. The International Journal of Advanced Manufacturing Technology, 2017, 88: 219-227.
［10］WU D S, HUA X M, YE D J, et al. Understanding of humping formation and suppression mechanisms using the numerical simulation［J］. International Journal of Heat and Mass Transfer, 2017, 104(8): 634-643.
