超薄笔记本风扇盖压铸工艺设计及数值模拟

Process Design and Numerical Simulation of Die-casting Ultra-thin Laptop Fan Cover

采用压铸工艺成形铝合金超薄笔记本风扇盖产品。分析了铸件结构,进行了浇注系统和模具设计,并使用三维建模及数值模拟进行了优化。结果表明,根据铸件的温度场、充型流动状况、凝固状况、铸件的缩松缩孔所在位置及孔隙率,模拟并优化出铸件的最佳压铸工艺参数:铝合金浇注温度为680℃、模具预热温度为220℃、压射速度为4 m/s。根据优化后的工艺参数进行生产验证,得到了质量符合要求的超薄笔记本风扇盖铸件。

Aluminum alloy ultra-thin laptop fan covers were produced with die casting process. The structure of fan covers were analyzed, the gating system and die were designed and the 3D modeling and numerical simulation were used to optimize it. The results show that the optimum casting process parameters are simulated and optimized according to the temperature field, filling flow condition, solidification condition, shrinkage cavity location and porosity of the castings, aluminum alloy pouring temperature is 680℃, the mould preheating temperature is 220 ℃, the injection speed of 4 m/s. According to the optimized process parameters, the product is verified, and the ultra-thin laptop fan cover casting with excellent quality is obtained.