变截面涡旋齿三维形貌分析与功率谱密度表征  

Three-Dimensional Topography Analysis and Power Spectral Density Characterization of Non-uniform Scroll Teeth

作　　者：刘涛[1] 李银萍 孙永吉 LIU Tao;LI Yinping;SUN Yongji(School of Mechanical and Electrical Engineering,Lanzhou University of Technology Lanzhou,730050,China;Jinchuan Group Co.,Ltd.Jinchang,737103,China;College of Innovation and Entrepreneurship,Lanzhou Institute of Technology Lanzhou,730050,China)

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]金川集团股份有限公司,金昌737103 [3]兰州工业学院创新创业学院,兰州730050

出　　处：《振动．测试与诊断》2022年第2期322-327,409,410,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51265027,51665035)。

摘　　要：为了量化表征变截面涡旋齿形貌的变化规律并提取特征信息,以45#钢和硬铝7075材料进行了3段基圆渐开线变截面涡旋铣削加工实验,用TalysurfCLI 1000形貌仪测量了涡旋齿三维形貌和表面粗糙度,对形貌图像进行了分析和比较,运用一维和二维功率谱密度方法量化表征了涡旋齿形貌的频率‑空间分布信息。形貌分析表明:45#钢试样涡旋齿形貌变化趋势接近走刀痕迹,呈现较强的规律性;45#钢涡旋齿试样表面形貌变化高度大于硬铝7075,且形貌的变化与型线位置无明显联系。二维功率谱密度分析表明,涡旋齿形貌呈各向异性特征,x方向空间频率0~0.02μm^(-1)是影响涡旋齿形貌的主导频率,涡旋齿主要缺陷存在于空间波长50μm内。一维功率谱密度表征解析了涡旋齿试样粗糙度相近、但表面形貌和粗糙度差异性明显的现象。实现了涡旋齿形貌不同层次特征的定量表征和信息提取。It is important to study the changing regularity of the sidewall surface topography of non-uniform scroll teeth and its characterization for assessing the machining quality of the scrolls.In this study,the sidewall surface topography of scroll teeth samples made of different materials is measured by Talysurf CLI1000.After analyzing and comparing three-dimensional topography image,the frequency-spatial distribution of the samples topography is quantitatively characterized by both one dimensional and two-dimensional power spectral density method.Three-dimensional topography analysis shows that the scroll teeth topography of steel45 is relatively smooth and regular,and its variation is larger than that of duralumin7075;there is no obvious relationship between scroll profile and surface topography.Results from two-dimensional power spectral analysis indicate that the scroll teeth topography is anisotropy,and the dominated spatial frequency of x direction is 0~0.02μm^(-1),which significantly affects the surface topography of the scroll teeth.Main defects on the scroll teeth exist within the space wavelength of 50μm.One dimensional power spectral analysis further explains the phenomenon that the scroll teeth topography of scroll samples is rather different although the surface roughness is similar.This study implements effective description and quantative analysis of scroll surface topography in different levels.

关 键 词：变截面涡旋齿 三维形貌 功率谱密度 表面粗糙度 

分 类 号：TH455[机械工程—机械制造及自动化] TH161.1