某航空发动机分油套筒砂型铸造工艺研究

摘要

In order to resolve the problem of metallurgical quality defects which are existed in the engine oil distributing sleeve casting,combined casting structure with performance features of magnesium alloy,analyzed the reasons of quality de-fects.The paper made a plan of measures including adding sprue filter,collocating reasonably with induced cold iron colora-tion,adopting sloping casting and establishing enlarged feed size based on the original casting system,casting system and process files has been completed and trial manufacturing validation has been organized.The results showed that quality de-fects of casting had been removed and products percent of pass had been increased largely.%针对某航空发动机分油套筒铸件(下述简称铸件)存在冶金质量缺陷的问题，结合铸件结构和镁合金性能特点，分析了其质量缺陷的成因。立足于原有浇注系统，制定了增加浇道过滤网、合理搭配激冷冷铁、采用倾斜浇注及增加冒口尺寸等改进措施，对浇注系统和工艺资料进行了完善，并进行了试验验证。结果表明，铸件内部质量缺陷已消除，产品合格率大幅提高。