铝合金动圈骨架低压铸造工艺数值模拟研究  

Numerical Simulation of Low-pressure Casting Process of Aluminium Alloy Moving Coil Skeleton

作　　者：谢涛 陈乐平[1] 袁源平 潘俊霖 Xie Tao;Chen Leping;Yuan Yuanping;Pan Junlin(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University)

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2023年第10期1385-1390,共6页Special Casting & Nonferrous Alloys

基　　金：江西省科技重点研发计划资助项目(20212BBE53018);南昌航空大学研究生创新专项基金资助项目(YC2023-021)。

摘　　要：动圈骨架是电动振动台的核心构件,低压铸造因金属液平稳充型、顺序凝固,适合生产存在薄壁的铸件。基于ProCAST软件对ZL302铝合金动圈骨架进行低压铸造数值模拟,设置浇注温度为690~730℃,砂型预热温度为30~100℃,保压压力为23~33kPa。采用正交试验研究浇注温度、砂型预热温度、保压压力对铝合金动圈骨架低压铸造成形的影响。结果表明,随着浇注温度升高,金属液充型效率提高,铸件的缩孔缩松率降低;砂型预热温度升高对金属液充型效率影响较小,但延长铸件凝固时间,有利于铸件补缩;低压铸造凝固过程中提高保压压力,有利于铸件补缩,铸件内部缩孔缩松体积由0.13cm^(3)降至0.11cm^(3)。实际生产过程中,在保证砂型强度的前提下,适当增加保压压力以减少缩孔、缩松缺陷。The moving ring skeleton is the core component of the electric shaker,and low-pressure casting is suitable for the production of thin-walled castings due to the smooth filling and sequential solidification of liquid metal.Based on the ProCAST software,low pressure casting of ZL302aluminium alloy moving ring skeleton was simulated with the pouring temperature of 690~730℃,sand preheating temperature of 30~100℃,holding pressure of 23~33kPa.Orthogonal experiments were conducted to investigate the effects of pouring temperature,sand preheating temperature,holding pressure on the low-pressure casting aluminium alloy moving ring skeleton.The results reveal that with the increase of pouring temperature,the efficiency of liquid metal filling is improved and the shrinkage rate of the casting is reduced.The increase of sand preheating temperature has less effect on the efficiency of liquid metal filling,however it can prolong the solidification time of casting,which is conducive to the feeding.The increase of holding pressure in the process of low-pressure casting is conducive to the feeding,and the volume of shrinkage inside the castings is decreased from 0.13cm^(3) to 0.11cm^(3).In the production process,under the premise of ensuring the strength of sand mould,the holding pressure is appropriately increased to reduce the shrinkage defects.

关 键 词：铝合金 低压铸造 数值模拟 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TP311[金属学及工艺—金属材料] TG249.2[金属学及工艺—金属学]