Numerical Simulation and Process Optimization of Low Pressure Casting for Swing Arm of Aluminum Alloy Suspension

Author of the article:YANG Chuang, SU Xiaoping, ZHOU Dashuang, KANG Zhengyang

Author's Workplace：School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China

Key Words：aluminum alloy swing arm; numerical simulation; low pressure casting; Taguchi method; cooling process

Abstract：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%.