基于PROCAST和SLS的燃烧室机匣铸造工艺优化

Combustion Casing Casting Process Optimization Based on PROCAST and SLS

使用轻质铝合金零部件是实现飞机轻量化的途径之一,燃烧室机匣作为典型的铝合金零件,具有薄壁、复杂内腔等特点。为了研究燃烧室机匣的铸造工艺,采用PROCAST数值模拟和响应面法研究燃烧室机匣,预测机匣内部缩松缩孔位置。结果表明,燃烧室机匣两端法兰处和三角形凸台处易产生缩松缩孔缺陷,通过添加保温冒口和布置冷铁和对砂型进行工艺优化。对比传统密实砂型和镂空砂型对机匣的影响,研究得到优化砂型模型,对改进砂型设计进行响应面法试验,得到最佳的工艺参数。

The use of lightweight aluminum alloy parts is one of the ways to achieve aircraft lightweight,and the combustion chamber,as a typical aluminum alloy part,has the characteristics of thin wall and complex inner cavity.In order to study the casting process of the combustion casing,this paper uses PROCAST numerical simulation and response surface method to study the combustion casing and predicts the position of shrinkage holes inside it.The results show that the shrinkage holes inside the combustion casing are reduced by adding thermal insulation risers,arranging cold irons and optimizing the process of sand molds.Compared with the influences of traditional dense sand mold and hollow sand mold on the casing,the optimized sand mold model is obtained,and then the optimal process parameters are obtained by the response surface method test of the improved sand mold design.