Aluminum Alloy Of Iron With Sand Casting Technology And Its Numerical Simulation

Iron coated with resin sand mould is a new casting method what it covers with a floor of molding sand and come into being a molten shape in the metal mould cavity internal wall. The remarkably characteristic of technology is that it dominates the cooling speed of casting by controlling the thickness of sand layer and iron wall. The cast structure by the process is compact and mechanics capability is better. Because iron coated with resin sand mould molten shape is good at rigidity and the floor of sand in the mould lining is thin, the metal mould cavity don' t be easy to distort. Consequently, At observably enhances the size precision and consumedly reduces exterior coarseness. The quality of the castings improves consumedly and wasters are reduced remarkably. The key of the technology is to strictly control the cooling rate of casting. If the velocity is over quick, it will bring hot stress. On the contrary, if the velocity is slow, it will result in thick crystal particle of cast structure. When the thickness of the sand layer is natural, the cooling velocity of casting is increased with the reduced thickness;when the thickness of the sand layer preponderate over the natural area, metal mould will not bring any effect to the casting' s cooling rate.In the paper, the cooling curve of ZL102 aluminum alloy cylindrical casting during iron coated with resin sand mould process is tested. The thickness of sand layer and ferric wall to the influence of cooling speed and its solidification trait are analyzed. The temperature field is numerical simulated by a large FEA software-ANSYS. The results come as follows:It is feasible to measure the temperature field by the experiment methods during iron coated with resin sand molding process. It is so convenient and the date is credible. The method examining the temperature field adopting inspecting many dots at the same time contains the extensivefulfillment application value. In contrast with iron wall, sand layer' s influence to the cooling rate of the castings is higher. It is very important to choose the fit sand layer thickness. The method simulating the temperature field of aluminum alloy casting during iron coated with resin sand molding process by a FEA software-ANSYS can visually give the numerical value in changing curve connecting temperature and time. Besides, it is efficient and useful. It is clear that the two results are equaled to each other on the whole, which indicates that the changing trend and law resulting from two methods is consistent.