CAE Of Vacuum Die Casting Technology For Magnesium Shell Parts

It is easy to generate dendritic during the process of solidification because of the wider solidifying areas of magnesium alloys. Liquid feeding inhibited will lead to suction pressure created in the local closed areas, where is advantageous to evolved gas lixiviation. Meantime during die casting process, molten metal fill the cavity with high speed and high pressure. Gas that exist in the cavity is hard to discharged, which would be evolved in the castings and effect the casting performance. According to the deficiency of die-casting, this article proceeds optesthesia appraisal to the filling and solidifying process and completes CAD/CAE integration for magnesium cover parts with vacuum die casting technology combining with CAE thinking.The article begins with the characteristic of filling and solidifying process, assigning finite element method as computation method for simulation. The theory basis of numerical simulation process and implementation method of ProCAST software are represented.Casting system design is important to ensure the quality of die cast. Whether it is well depends on the layout of subchannel and the position and cross-section size of gate. Here first proceeds entity and finite element model building with Pro/E software. Two casting systems are designed. Secondly after technology parameters are determined, the numerical simulation of filling and solidification process is proceeded with ProCAST software. The distribution of fluid and temperature field is observed, and the distributions of flaws are forecasted. The result shows the main defects exist in the cast is shrinkage and gas porosity. Vacuum die-casting can induce gas porosity validly compared with die casing for two designs. The optimum structure design and technology parameters are...