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铝合金悬架摆臂低压铸造数值模拟与工艺优化
Numerical Simulation and Process Optimization of Low Pressure Casting for Swing Arm of Aluminum Alloy Suspension
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- DOI:
- 作者:
- 杨闯，苏小平，周大双，康正阳
YANG Chuang, SU Xiaoping, ZHOU Dashuang, KANG Zhengyang
- 作者单位:
- 南京工业大学 机械与动力工程学院，江苏 南京 211816
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China
- 关键词:
- 铝合金摆臂；数值模拟；低压铸造；田口方法；冷却工艺
aluminum alloy swing arm; numerical simulation; low pressure casting; Taguchi method; cooling process
- 摘要:
- 以汽车铝合金悬架摆臂为研究对象，运用数值模拟技术和田口方法，研究了低压铸造中合金液的浇注温
度、模具预热温度以及充型时间 3 个工艺参数对铸件孔隙率大小的影响规律，并且以铸件的孔隙率最小为优化目标，寻
优得到摆臂的低压铸造工艺参数。 在此基础上，通过对冷却系统的设计与改进，有效的实现了铸件的顺序凝固。 结果表
明，当浇注温度为 700 ℃、模具预热温度为 290 ℃、充型时间为 13 s 时，结合合理的冷却工艺方案，可有效的消除铸件内
部缺陷。 经过试制生产，良品率可达 86%。
With aluminum alloy suspension swing arm as the research object, using the numerical simulation technology and method, the low pressure casting alloy liquid in the pouring temperature, mould preheating temperature and filling time three the influence law of process parameters on the casting porosity size, and porosity in castings minimum as the optimization goal, optimization for the low pressure casting process parameters of the swing arm were studied. On this basis, through the design and improvement of the cooling system, the sequential solidification of the castings was realized effectively. The results show that when the casting temperature is 700 ℃, the preheating temperature of the mold is 290 ℃, and the filling time is 13 s, the internal defects of the casting can be effectively eliminated by combining with the reasonable cooling process. After trial production, the yield can reach 86%.