Sutudy on bridging tranfer phenomena in Gas Metal Arc welding

对分枝转移的动力学进行了全面的理论和实验研究。通过高速摄影观察了电极与熔池表面接触形成的液桥随时间的变化，并借助基于有限差分方法的二元不可压缩自由表面流体动力学数值解技术(MAC方法)进行了数值模拟。结果表明，作用在导电桥上的毛细管力和电磁箍缩力驱动着悬滴中的液体流入熔池。

The dynamics of brdging transfer are theoreticall and experinmentally investigated. Time-dependent deformation of the liquid bridge, which is formed between the electrode and the pool by a contact of a pendent drop with the pool surface, is obserbed by high speed photography and simulated with aids of the numerial solution technique for the dynamics of a biscous incompressible fluid with a free surface (MAC method) based on Finite-Difference Method. It is shown that the liquid of the pendent drop is driven to flow into the pool by the capillary force and the electromagnetic pinch force acting on the conducting bridge.