基于ProCAST的铝合金缸体压铸工艺数值模拟

Numerical Simulation of Die Casting Al Alloy Cylinder Based on the ProCAST Software

针对气缸缸体铸件,建立了三维模型,并基于ProCAST对铸造充型和凝固过程进行了模拟,获得了温度场的变化情况,模拟结果显示了铸造缺陷的位置。对模拟结果进行分析,并改进初始工艺方案。再对改进后的方案进行数值模拟,并对不同浇注参数进行模拟分析。结果表明,降低压射速度和提高模具预热温度,能有效地减少缩孔、缩松等缺陷,提高铸件品质,降低废品率,缩短生产周期。

For cylinder block castings,pouring system model was established by a 3Dsoftware,and filling and solidification process were simulated by the ProCAST.Finally,the change of temperature field was visualized.The simulation results present the location of the casting defect.The initial process scheme was modified based on analysis of the simulated result.Numerical simulation was conducted to the improved scheme with different casting parameters.The results show that through reducing injecting velocity and increasing mould preheating temperature,the defects such as shrinkage（cavity）porosity can be reduced effectively,improving casting quality,reducing rejection rate and decreasing production cycle.