Study on Numerical Simulation of Lost Foam Casting

In recent years, with the development of casting numerical simulation technology, there are many research results in traditional pressure casting and sand mold casting. Compared with ordinary pressure casting and sand casting, the application research of numerical simulation technology of lost foam casting started late. British researcher R.D. buttercarried out research on the filling process in the lost foam casting process. The pouring liquid metal moves forward in a diffuse manner during the filling process, and the pattern decomposition speed and the escape speed of pattern decomposition products determine the filling speed of liquid metal.

Xu Shida and others studied the influencing factors of lost foam casting filling process by photography in 1976. The influencing factors include pattern density, alloy type, pouring speed and pouring position. Wei zunjie studied the lost foam casting process through boundary conditions. He set the calculated air gap pressure as the boundary conditions. Previously, he had studied the calculation method of air gap pressure at the front of liquid metal filling, and finally analyzed the simulation of flow field in the filling process of aluminum alloy lost foam casting.

Considering the characteristics of temperature field and flow field in lost foam casting, s.m.h. mirbagher et al. Modified SOLA-VOF algorithm. The modified SOLA-VOF algorithm can simulate the whole mold filling process because it iterates partially filled and filled grids at the same time. The modified algorithm takes into account the air gap pressure and the pressure of liquid metal in the flow domain at the same time.

So far, many countries and individual institutions have developed the lost foam simulation software. Our commonly used ProCAST is developed by the French, and ProCAST software is also the main lost foam simulation software of this subject. In addition, there is magma software, which is developed by Germany. There are also simulation software in the United States, such as technalysis and flowscience in the United States.

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