压铸过程数值模拟技术研究进展
Special Casting & Nonferrous Alloys（2023）
武汉理工大学
Abstract
压铸作为一种有色金属近净成形制备工艺,具有生产效率高、产品尺寸精确、表面质量好等特点,被广泛应用于汽车、电子及通讯等领域.然而,由于合金熔体高速高压充填型腔,压铸充型及凝固过程极其复杂.综述了国内外压铸过程数值模拟技术的研究进展,阐述了当前压铸充型及卷气缺陷预测采用的模型与求解算法,按照在压室及压铸型腔两个阶段分析了熔体温度场模拟仿真的影响因素,重点论述了界面传热系数对压铸熔体温度场模拟仿真的影响,对比了不同的缩孔缩松缺陷预测判据,分析了压铸模具热平衡及寿命预测模型与方法.针对大型结构件一体化压铸带来的模拟仿真时网格数量及计算规模庞大问题,阐述了网格划分的方法,并总结了仿真效率提升方法.最后指出了当前压铸过程数值模拟研究存在的不足及发展方向.
MoreKey words
Die Casting,Numerical Simulation,Filling,Solidification,Integrated Die-casting
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