Improvement of Low-pressure Casting Process For a Large Complex Cylindrical Casting
Author of the article:LIU Jing;WANG Xiaobo
Author's Workplace：Plant 11,Aviation Industry Qingan Group Co.,Ltd.,Xi'an 710077,China;Trw Dongfang(Xi'An)Airbag Inflator Co.,Ltd.,Xi'an 710072,China
Key Words：aluminum silicon alloy low pressure casting the processing plan procast simulation
Abstract：According to the structural characteristics and performance requirements of large-scale aviation aluminum alloy castings,the causes of various casting defects in sand mold gravity casting were analyzed,and the feasibility,principle and advantages of low-pressure casting process were discussed.Through the analysis of casting structure and forming principle,the design of low-pressure casting mold was carried out.The results show that the casting simulation software is used to optimize the casting process,and the process parameters of the low-pressure casting process of large aviation aluminum alloy castings are determined in combination with the process tests.The problems of porosity,shrinkage and slag inclusion are solved to ensure the quality of casting.
