Modeling of conditions for formation of melted metal bath and weld during facing with consumable electrode and additional fi ller wire

Abstract

The capabilities of computer simulation of complex multifactorial surfacing processes are discussed. Physical and mathematical model for the formation of melted metal bath and weld during consumable electrode surfacing with additional fi ller wire of parts and components of pipeline valves is presented. The basis of the model is equations system of heat transfer and pressure equilibrium on the surface of the melt. In the boundary conditions of the equations, change in the geometry of the surface due to transverse vibrations of the surfacing torch is taken into consideration. Numerical solution of the equations system showed that the main source of heat is heat from the droplets of the electrode and fi ller materials, its distribution is mainly determined by the amplitude and period of transverse vibrations. The results of process numerical simulation are presented. The results of the study are used in the development of innovative technological processes for surfacing of parts and components of pipeline valves.