基于HHT方法的纳米晶粒硬质合金磨削振动特性分析  

Analysis of Vibration Characteristics of Nano-grain Cemented Carbide Grinding Based on HHT Method

作　　者：詹友基[1] 周家骐 许永超 卢青怡 王英杰 苏乙峻 Zhan Youji;Zhou Jiaqi;Xu Yongchao;Lu Qingyi;Wang Yingjie;Su Yijun(Fujian Universi-ty of Technology,Fuzhou 350108,China;不详)

机构地区：[1]福建工程学院,福州市350108

出　　处：《工具技术》2022年第12期64-68,共5页Tool Engineering

基　　金：国家自然科学基金(51775113)。

摘　　要：使用精密平面磨床磨削GU092纳米晶粒硬质合金时,采用HHT时频分析法对磨削振动信号进行分析,能够得到磨削原始振动信号的时频谱、边际谱和瞬时能量,为进一步分析磨削振动频率特性提供理论基础。分析结果显示:HHT分析法对非平稳、随机复杂的磨削振动波的分解具有高效性和准确性;磨削振动信号构成频率丰富,主要组成部分属于高频;磨削深度ap、砂轮线速度vs和工件进给速度vw对瞬时能量均有正影响;从能量方面分析了纳米晶粒硬质合金磨削振动特性,为评价磨削加工振动提供了新思路。A precision surface grinder is used to grind nano-grain cemented carbide GU092,by using HHT time-frequency method for grinding vibration, the signal is analyzed to obtain the time spectrum, marginal spectrum and instantaneous energy of the original vibration signal.It provides a theoretical basis for further analysis of grinding vibration ferquency characteristics.The results show that the HHT analysis method is highly efficient and accurate in the decomposition of non-stationary, random and complex grinding vibration waves.The grinding vibration signal has a rich frequency, and the main components are high-frequency.The grinding depth a_(p),the grinding wheel linear velocity v_(s),and the workpiece feed speed v_(w) have a positive effect on the instantaneous energy.The grinding vibration characteristics of different types of nano-grain cemented carbide are analyzed from the energy aspect, which provides a new idea for evaluating grinding processing vibration.

关 键 词：纳米晶粒硬质合金 HHT时频分析 磨削参数 瞬时能量 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床] TG135.5[一般工业技术—材料科学与工程]