基于华铸CAE的静叶持环砂型铸造工艺参数与缺陷关系的研究

Relationship between Process Parameters and Defects of Static Leaf Holding Ring in Sand Casting Process Based on InteCAST

静叶持环砂型铸件中的缩孔、缩松、卷气、变形等缺陷对铸件性能影响很大,采用传统方法对其进行工艺优化难度较高。采用数值模拟和正交试验方法,研究了不同工艺参数对于合金充型凝固后缩孔缩松等缺陷的影响。结果表明,选取合适的浇注温度,适当缩短充型时间,适当提高铸型初始温度,可以有效降低铸件中的缩孔缩松率,选取较高的浇注温度可以降低铸件的变形量。充型时间15 s,浇注温度1590℃,铸型初始温度30℃时,该静叶持环砂型铸件质量最好。分析结果可为静叶持环砂型铸造的设计和制造提供理论和技术支持。

The defects such as shrinkage hole,shrinkage loose,air volume and deformation in sand castings with stationary blades have great influence on the performance of the castings,and it is difficult to optimize the process by traditional methods.Numerical simulation and orthogonal test were used to study the effect of different process parameters on the shrinkage and porosity of alloy after mold filling and solidification.The results show that selecting the appropriate pouring temperature,shortening the filling time and rai-sing the initial casting temperature can effectively reduce the shrinkage and porosity of the castings,and selecting a higher pouring tem-perature can reduce the deformation of the castings.The test results show that the best casting quality can be obtained when the filling time is 15 s,the pouring temperature is 1590℃and the initial casting temperature is 30℃.The analysis results can provide theoreti-cal and technical support for the design and manufacture of sand mold casting with stationary blade retaining ring.