摘要
单晶金刚石磨粒的机械磨损是其磨粒加工过程中磨损的主要形式之一。利用单颗单晶金刚石磨粒划擦Ta12W,跟踪检测了磨粒划擦过程中磨损体积、磨损率和磨损形貌等机械磨损的变化特征,并监测分析了其机械磨损声发射信号特征参数和时域信号特征。利用G-P算法对金刚石磨粒机械磨损声发射信号进行相空间重构,利用自相关函数法确定了相空间的时间延迟,计算出相空间的双对数图,从而得到金刚石磨粒不同磨损阶段的关联维数。研究结果表明:单晶金刚石磨粒划擦Ta12W的机械磨损声发射信号具有混沌变化特性,随着嵌入维数的增加,其关联维数的变化趋于平稳,关联维数变化幅值与其磨损率基本呈正效应关系。通过基于G-P算法计算分析磨粒划擦过程中声发射关联维特征,进一步揭示单晶金刚石磨粒机械磨损特性。
The mechanical wear is the main form for single crystal diamond abrasive grit in the abrasive machining process.The mechanical wear characteristics such as wear volume,wear rate and wear morphology was investigated during single crystal diamond abrasive grit scratching on Ta12W.The characteristic parameters and time domain of acoustic emission(AE)are detected and analyzed.The phase space of AE signals during the mechanical wear process of diamond grit is reconstructed with G-P algorithm.The time delay of phase space is calculated by the autocorrelation function,and the double logarithmic graph is calculated.The correlation dimension values of diamong grit in different wear stages are calculated.The results show that the AE signals of the mechanical wear for single crystal diamond grit scratching on Ta12W have the property of chaotic characteristics.The variations of correlation dimension tend to stable with the increasing of embedding dimension.The variation amplitude of correlation dimension is positively correlated with the wear rate.The mechanical wear characteristics of single diamond abrasive grit during the scratching process is revealed further by the correlation dimension characteristics analyzed with G-P algorithm.
作者
吴海勇
WU Hai-yong(College of Mechanical Engineering, Zhangzhou Institute of Technology, Zhangzhou 363000, China;Institute of Manufacturing Engineering, Huaqiao University, Xiamen 361021, China;Post-Doctoral Research Center, Fujian Longxi Bearing (Group) Corp., LTD, Zhangzhou 363000, China)
出处
《人工晶体学报》
EI
CAS
北大核心
2019年第1期54-59,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(51775113)
福建省自然科学基金(2018J05146
2017H6014
2016J01723)
教育部创新团队发展计划(IRT_17R41)
华侨大学制造工程研究院开放基金(2018IME-001)
漳州职业技术学院科技项目(ZZY1906)
石材产业加工技术与装备福建省2011协同创新中心合作项目(2017XT002)
关键词
金刚石磨粒
划擦
机械磨损
声发射
关联维
diamond abrasive grit
scratching
mechanical wear
acoustic emission
correlation dimension
作者简介
吴海勇(1985-),男,福建省人,博士,副教授。
