Sutudy on bridging tranfer phenomena in Gas Metal Arc welding

本文从理论和实验两方面研究了桥接传输的动力学。本文用高速摄影法对悬滴与液池表面接触而在电极与液池之间形成的液桥随时间变化的变形进行了观测，并借助于基于有限差分法的含自由表面的双粘性不可压缩流体动力学数值解技术（MAC法）进行了模拟。结果表明，悬滴中的液体是在毛细力和作用于导电桥的电磁箍缩力的共同作用下流入池中的。

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.