Numerical simulation and analysis of mould filling process in lost foam casting

【摘要】 In lost foam casting(LFC)the foam pattern is the key criterion,and the filling process is crucialto ensure the high quality of the foam pattern.Filling which lacks uniformity and denseness will cause variousdefects and affect the surface quality of the casting.The influential factors of the filling process are realized in thisresearch.Optimization of the filling process,enhancement of efficiency,decrease of waste,etc.,are obtained bythe numerical simulation of the filling process using a computer.The equations governing the dense gas-solid two-phase flow are established,and the physical significanceof each equation is discussed.The Euler/Lagrange numerical model is used to simulate the fluid dynamiccharacteristics of the dense two-phase flow during the mould filling process in lost foam casting.The experimentsand numerical results showed that this method can be a very promising tool in the mould filling simulation of beads’movement.更多还原

【Abstract】 In lost foam casting(LFC)the foam pattern is the key criterion,and the filling process is crucial to ensure the high quality of the foam pattern.Filling which lacks uniformity and denseness will cause various defects and affect the surface quality of the casting.The influential factors of the filling process are realized in this research.Optimization of the filling process,enhancement of efficiency,decrease of waste,etc.,are obtained by the numerical simulation of the filling process using a computer. The equations governing the dense gas-solid two-phase flow are established,and the physical significance of each equation is discussed.The Euler/Lagrange numerical model is used to simulate the fluid dynamic characteristics of the dense two-phase flow during the mould filling process in lost foam casting.The experiments and numerical results showed that this method can be a very promising tool in the mould filling simulation of beads’ movement.更多还原