Study on the mechanism of pressure-induced erosion in molten pool of EDM metal

Abstract This study employs molecular dynamics methods to explore the mechanism of pressure-induced erosion due to the pressure differential within and outside the molten pool during the EDM process. Through simulations of the EDM process for metals such as copper and tungsten, it was found that high melting point materials exhibit slow melting and evaporation rates within the molten pool, resulting in lower internal pressures and reduced efficacy in material erosion, thereby exhibiting high erosion resistance. Experimental validation has demonstrated that the machining efficiency of metals increases with the decrease in their melting points, thus confirming the accuracy of the simulation results. This research not only unveils the micro-dynamic mechanisms of material erosion but also provides a theoretical foundation and experimental support for the advancement of EDM technology.