Effects of pouring process on Vacuum Counter pressure Casting Filling Flow of Thin-wall Aluminum has great theoretical and practical significance. Vacuum Counter pressure Casting is a new casting technology for low pressure filling, high pressure crystallization.The technology mainly for the production of large thin-walled aluminum alloy castings. As the thin wall castings, The filling process has mean a lot for Vacuum Counter pressure Casting.In this paper, simulation and experiments in both directions for different filling pressure,different thickness,different thin-walled parts gating system filling the vacuum pressure casting process.The Simulator of Procast to simulation the vacuum pressure casting of aluminum alloy filling process. The simulation results show that:When the pressure difference larger. The liquid metal in the process of filling a certain extent will be reverse fill. And if the pressure difference about filling pressure is small,There is the phenomenon of liquid metal attached to wall. In the secondary runner pouring conditions thickness under the same pressure has less impact on the filling pattern; vacuum pressure casting filling process, with the increase in wall thickness, filling stability was reduced, with the pressure increases, the filling rate of increase in filling time shorter.In addition, Experimental in the self-made vacuum pressure casting machine about intelligent control with the electrode contact method of thin-walled aluminum alloy under three different flow patterns. Test results show by the contact electrode method that:Reverse fill will easy to appear when pressure larger,thicker wall casting. mobility patterns of liquid metal are more disordered;The main burden of supporting the allocation of runner flow to ensure a reasonable flow pattern, so that liquid metal in the pouring system unit and the mold cavity flow pattern of the smooth filling patterns can improve the jet. In ensuring the integrity of the case of filling,As far as possible to maintain low dropout, low-speed of the filling Analysis the filling rate of fluid under the conditions by sprue casting and the auxiliary sprue, the relationship between the obtained about filling velocity v1 and difference pressureΔP about : Effects of Pouring process on Vacuum Counter pressure Casting Filling Flow of Thin-wall Aluminum and simulation by Procast for it are Meaningful. It's very beneficial for quality of thin-walled castings; can guide production.. Vacuum Counter Pressure Casting technology will also research and contribute by this improve. |