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

作　　者：Jiang Junxia Wu Zhichao Chen Liliang Hao Jing 

机构地区：[1]State Key Lab of Materials Process and Die ＆ Mould Technology, Huazhong University of Science and Technology, Wuhan 430074,China

出　　处：《China Foundry》2008年第3期175-178,共4页中国铸造（英文版）

基　　金：The National High Technology Research and Development Program of China(863Program)(2006AA04Z140);The National Natural Science Foundation of China(NSFC)(50605024)

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.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.

关 键 词：lost foam casting numerical simulation filling process DEFECT gas-solid two-phase flow 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TG249.6[自动化与计算机技术—计算机科学与技术]