工程设计学报2019，Vol.26Issue(1)：79-86,8.DOI:10.3785/j.issn.1006-754X.2019.01.011
磨料水射流对脆性材料的冲蚀研究
Study on erosion of abrasive water jet on brittle materials
摘要
Abstract
Abrasive water jet technique is a special process popularized and applied in many fields due to its advantages like no tool contact, no heat-affected zone and high machining versatility, etc.In order to investigate the erosion effect on brittle materials, the erosion simulation model of abrasive water jet at outer flow field and abrasive water jet erosion experiment were designed.The abrasive water jet erosion simulation model was set up based on the 30 mm×50 mm outer flow field of the nozzle.The distribution of pressure, velocity of water and abrasive and their attenuation law on the center line of jet in the erosion process were fully analyzed.Through the erosion test of alumina ceramic material, the influence of process parameters on the erosion hole diameter was analyzed as well.Combining with the simulation results, the relationship between jet beam width and erosion hole diameter was compared and analyzed.The results indicated that the water velocity decreased with the increase of nozzle distance and the distribution range became wider, and the width of jet increased linearly.The abrasive velocity decreased with the increase of nozzle distance while the distribution width was almost unchanged.The velocity of water and abrasive on the center-line of jet showed three-stage attenuation.During the first stage, the length of the velocity attenuation section of water was longer than that of abrasive, but during the second one, the length of the velocity attenuation section of water was shorter than that of abrasive.In addition, the effective utilization of jet energy decreased gradually.However, in the target range of 15～25 mm, the effective utilization part was more stable at around 40％, and the erosion hole diameter increased linearly with the nozzle distance increasing.The research results can provide experimental basis for the parameter selection of abrasive water jet cutting, milling and polishing, and provide reference for the simulation of abrasive water jet machining.关键词
磨料水射流/冲蚀性能/速度分布/衰减/冲蚀孔径Key words
abrasive water jet/erosion performance/velocity distribution/attenuation/erosion hole diameter分类
机械制造引用本文复制引用
王志敏,武美萍,魏晶晶..磨料水射流对脆性材料的冲蚀研究[J].工程设计学报,2019,26(1):79-86,8.基金项目
国家自然科学基金资助项目 (51575237) （51575237）
装备预研教育部联合基金资助项目 (62501036035) （62501036035）
