基于ProCAST的镁合金惯组支架砂型铸造工艺研究

Process Optimization of Sand Casting of Magnesium Alloy Bracket Based on ProCAST Software

为实现镁合金惯组支架的高效率、高质量研制,使用ProCAST软件仿真优化ZM5镁合金惯组支架铸造工艺。通过对充型、凝固过程进行分析,发现铸件内部的3条薄壁筋板易出现浇不足、冷隔缺陷,圆弧面内侧厚壁筋条易出现缩孔、缩松等缺陷。经过优化设计,通过采取增加薄壁筋板厚度、调整内浇道位置、改变厚壁筋板上侧冒口结构等措施,较好地避免了上述铸造缺陷的产生,获得了合格的支架铸件。数值模拟仿真技术可应用于绝大多数航天构件的铸造过程分析,实现构件快速研制。

In order to gain a high-quality bracket with high efficiency,the ProCAST software is used to optimize the casting process of the bracket made from ZM5 magnesium alloy.For the original casting process,cold shut and shrinkage can occur by observing the distribution of temperature in filling and solidification processes.By adding the thickness of thin-wall stiffened plates,adjusting locations of ingates and changing structures of risers on the top of the thick-wall stiffened plate,these defects can be avoided and a qualified bracket casting is made.The numerical simulation technology can be widely used for the process optimization and the manufacture of castings in aerospace field.