컴퓨터 시뮬레이션에 의한 자동차 밸브바디 다이캐스팅에 관한 연구

Abstract

In the slow speed die casting process, the casting defects due to melt flow should be controlled in order to obtain sound casting products. The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers In this paper, the computer simulation analyzed the flow of molten metal. The quantitative analyses which proposed the effective mold design was executed Flow patterns of 0.2-3m/s molten metal in 15mm thin plate casting were investigated in order to optimize die-casting process. As increasing ingate velocity in thin plate casting, cold shot was decreased. The calculation of simulation can produce very useful 50 and important results. In this diagram the calculation is made to insure that the liquid metal is injected at the right velocity range and that the filling time is small enough to prevent premature freezing. The parameters of runner shape that affected on the optimazed conditions that was calculated with simple equation were investigated