低压铸造铝合金电器罐体工艺优化

Optimization of Low Pressure Casting Process for Aluminum Alloy Combination Totally Enclosed Electrical Tanks

针对低压铸造加工全封闭式组合电器铝合金罐体产品合格率低的问题,通过ProCAST软件对原铸造工艺进行模拟。通过对比试验,并结合企业实际,确定优化工艺参数,并对铸件形状及浇注系统进行改进,消除了铸件缺陷。研究表明,浇注温度为700℃、充型压力为54kPa、模具预热温度为300℃时,对铸件下半部外侧壁厚增大1.5mm,形成适当厚度梯度,并将原浇注系统内浇道宽度增加7mm,可以消除铸件缺陷,提高铸件品质。

Aiming at high defects and low yield rate in low-pressure casting totally enclosed electrical aluminium alloy combination tanks,through the ProCAST software for simulating the original casting process as well as the comparative testing,and combining the practical production,the optimized parameters were determined.Through modifying the shape and adjusting gating system,the casting defects were eliminated.The results reveal that with pouring temperature of 700℃,the filling pressure of54 kPa and mould temperature of 300℃,through increasing the casting lower wall thickness by 1.5 mm to obtain rational thickness gradient,as well as enlarging original casting sprue width from 12.5 mm to19.5 mm,the casting defects can be relieved greatly,improving the quality of castings.