南京航空航天大学学报2025，Vol.57Issue(3)：535-546,12.DOI:10.16356/j.1005-2615.2025.03.015
冷冻砂型数控加工参数与排砂参数联合优化研究
Joint Optimization Study of CNC Machining Parameters and Sand Discharge Parameters for Frozen Sand Molds
摘要
Abstract
The preparation of frozen sand molds for casting by CNC machining methods is an important basis for the realization of digital frozen sand green casting.This paper carries out a study on the optimization of robust parameters for CNC machining of frozen sand profiles at different mesh sizes and different water contents,to obtain the combination of cutting process parameters that has the least impact on dimensional accuracy.The dimensional accuracy of CNC machined frozen sand molds is more stable when the cutting speed is 188 m/min,the feed rate is 120 mm/s,the depth of cut is 3 mm and the cutting width is 8 mm.Research on optimization of parameters of multi-parameter coupled sand removal process for frozen sand type is carried out.Taking the sand discharge rate as an index,the influence laws of flow rate,target distance,pitch angle and caliber on the sand discharge effect under conditions of different cavity three-dimensional size are analyzed,and the combination of sand discharge process parameters is optimized.The flow rate is 30 L/min,target distance is 45 mm,pitch angle is 65°,and caliber is 2 mm.Coupled with the mechanical properties of frozen sand mold and sand discharge requirements,the optimized molding parameters are 100 mesh raw sand and 4%(mass fraction)water content.Through the test optimization,a complete frozen sand CNC machining sand discharge process parameter window can be obtained,thus achieving high precision and high efficiency of frozen sand CNC machining forming.关键词
冷冻砂型/排砂工艺/正交试验/参数优化/排砂效果Key words
frozen sand mold/sand discharge process/orthogonal test/parameter optimization/sand discharge effect分类
矿业与冶金引用本文复制引用
刘亲将,单忠德,杨浩秦,闫丹丹,梁校..冷冻砂型数控加工参数与排砂参数联合优化研究[J].南京航空航天大学学报,2025,57(3):535-546,12.基金项目
国家重点研发计划(2021YFB3401200) （2021YFB3401200）
装备预研专用技术项目(30104040302) （30104040302）
江苏省基础研究计划(自然科学基金)青年基金(BK20230885). （自然科学基金）
