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对重要结构件薄壁铝合金壳体进行了低压铸造工艺设计,通过对充型流场、温度场以及缩孔、缩松的数值模拟预测,优化了该铸件的低压铸造工艺方案。模拟结果表明,采用导热更好的铜芯替换钢芯,能获得平稳的充型行为和均匀的温度场,预测的缩孔、缩松未出现在铸件上;优化后的薄壁铝合金壳体铸件的低压铸造工艺方案合理,可以有效地优化壳体温度场,降低铸件出现缩孔、缩松的几率,生产出了合格铸件。
The low-pressure casting process design of thin-walled aluminum alloy shell with important structural parts was carried out. Through numerical simulation and prediction of filling flow field, temperature field, shrinkage cavity and shrinkage, the low pressure casting process scheme of the castings was optimized. The simulation results show that the replacement of the steel core by the better thermal conductivity can obtain a smooth filling behavior and a uniform temperature field. The predicted shrinkage cavity and shrinkage do not appear on the casting. The optimized thin-walled aluminum alloy shell Casting low-pressure casting process is reasonable, you can effectively optimize the shell temperature field, reducing the occurrence of shrinkage casting shrinkage, shrinkage, to produce qualified castings.