Abstract: Considering the arc features of ForceArc welding process and its ability to realize mandatory spray transfer under short arc, the double elliptical heat source model and the exponentially-tapered peak value of droplet heat content in Gaussian cylinder was utilized. Based on the influence of groove geometry on ForceArc welding physical process, 3D transient numerical models for ForceArc welding process were set up under body fitted coordinate system. The influences of different preheating and interpass temperatures on welding process were simulated, the effects of groove shape on heat and mass transfer of weld pool were also analyzed and compared with experimental data. The results show that these models agree well with ForceArc welding process and can be used to optimize ForceArc welding parameters.