缸套磨损表面波纹度和粗糙度形貌特征变化规律  

Metrological Characteristics of Cylinder Liner Wear Surface Waviness and Roughness

作　　者：朱亚琼[1] 沈岩[1] 金梅[1] 徐久军[1] 

机构地区：[1]大连海事大学船机修造工程交通行业重点实验室,辽宁大连116026

出　　处：《中国表面工程》2014年第5期59-64,共6页China Surface Engineering

基　　金：国家重点基础研究发展计划(973)计划(编号略);中央高校基本科研业务费专项资金(3132014323)

摘　　要：以硼磷合金铸铁缸套与氮化铬活塞环为研究对象,通过设计贫油试验,获得了缸套从磨合磨损到正常磨损直至异常磨损的三维表面形貌。基于多分辨率二维离散小波获得三维表面形貌的各层高频系数,以二维功率谱密度进行高频系数分类,重构出磨损表面的形状误差、波纹度和粗糙度形貌。采用算术平均偏差、坡度参数、峰顶曲率参数,量化描述波纹度和粗糙度形貌几何特征的变化规律。结果表明:多分辨率二维离散小波可以提取不同磨损阶段的波纹度和粗糙度形貌;随着磨损的进行,波纹度和粗糙度形貌的算术平均偏差、坡度参数、峰顶曲率参数均增大;当出现异常磨损时,波纹度形貌的算术平均偏差变化幅度大于粗糙度形貌,粗糙度形貌的坡度变化幅度大于波纹度形貌,波纹度和粗糙度形貌的峰顶曲率参数变化幅度相近。The starvation experiment of boron phosphorus alloy cast iron cylinder and chromium nitride piston ring was designed.The cylinder liner samples including running-in normal wear and abnormal wear were obtained in the starvation experiment.Layers of high-frequency coefficients for three-dimensional surface topography were obtained by two-dimensional discrete wavelet and classified by two-dimensional power spectral density.Then cylinder shape error,waviness and roughness were reconstructed.The geometric characteristics of waviness and roughness were analyzed by the arithmetic mean deviation,the slope parameter,and the peak curvature parameter.The results show that the waviness and roughness of different wear state can be extracted by multi-resolution two-dimensional discrete wavelet.As the wear progresses,the arithmetic mean deviation,slope parameter,and peak curvature parameter of waviness increase.When abnormal wear occurs,the change magnitude of the arithmetic mean deviation for waviness is greater than roughness.The change magnitude of the slope parameter for roughness is greater than that of waviness.The change magnitude of peak curvature parameters for waviness is similar to that of roughness during the period.

关 键 词：二维离散小波 波纹度 粗糙度 

分 类 号：TH117.1[机械工程—机械设计及理论]