(1 清华大学实验室与设备处， 北京 1000842 清华大学机械系， 北京 100084
)
摘 要: 在低压铸造过程温度场及流场实验的基础上， 开发了基于SOLA-VOF算法的充型与凝固过程数值模拟软件，对72-46轮毂铸件进行了模拟分析。 结果表明， 低压铸造充型过程中降温明显， 准确的凝固模拟必须首先考虑充型。针对轮毂铸件的充型特点， 开发了简化充型模拟软件。 简化模拟得到的初始温度场与采用SOLA-VOF算法的模拟结果基本吻合， 实现了为后续凝固模拟提供正确的初始温度场的设计目标。
关键字: 低压铸造 充型模拟 凝固模拟 轮毂铸件 简化算法
OF LOW PRESSURE DIE CASTING
ALUMINUM WHEEL CASTING
（Department of Mechanics, Tsinghua University, Beijing 100084, P. R. China）
Abstract:Based on the temperature measurements and mold filling experiments, a mold filling simulation software of Low Pressure Die Casting (LPDC) was developed by using SOLA-VOF algorithm. Simulation analyses of 72-46 aluminum wheel were conducted. The mold filling simulation results showed that it is necessary to proceed mold filling calculation at first and then solidification simulation since the temperature of liquid metal dropped greatly during mold filling. Based on the filling characteristics of LPDC wheel castings, a simplified mold filling simulation software was developed. The simulated initial temperature fields are in agreement with the simulated result by using the traditional SOLA-VOF algorithm. The main purpose of this software which is to provide a correct initial temperature distribution in the casting and the mold for the subsequent solidification simulation, was achieved.
Key words: low pressure die casting mold filling simulation solidification simulation wheel casting
