磨合试验与表面形貌变化规律的分形表征  

Test of Running-in Process and Fractal Characterization of Change Rule of Surface Topography

作　　者：江炜[1,2] 朱华[1] 姬翠翠[1] 刘实现[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]中国矿业大学摩擦学国家重点实验室生物摩擦学中心,江苏徐州221116

出　　处：《山东科技大学学报（自然科学版）》2008年第6期62-66,共5页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(50475164);国家重点基础研究发展计划("973计划")项目(2007CB607605)

摘　　要：为了研究和掌握真实磨合过程中表面形貌的变化规律,在自制的摩擦磨损试验机上进行了更换摩擦副的磨合磨损试验,用T1000表面轮廓测量仪对试件表面形貌进行在线测量,进而运用分形理论对磨合过程中表面形貌的变化规律进行表征研究。结果表明:采用同一表面性质的一组试件进行磨合过程试验比传统的磨合试验方法科学合理,其试验结果具有客观性;随着磨合过程的进行,磨损表面粗糙度值Ra和尺度系数C逐渐减小,分形维数D与特征粗糙度Ra*逐渐增大,当达到磨合状态时它们都将达到稳定的数值。且特征粗糙度Ra*在反映磨合表面形貌的变化时不但具有与分形维数D和尺度系数C一样的规律性,而且表现出更高的灵敏性。In order to research and grasp the change rule of surface topography in the real running-in process, the running-in tests by changing friction pairs were carried on a homemade wear tester. The surface topography of test sample was measured with the T1000 measuring instrument online, then, the fractal theory was used to study the fractal characterization of the surface topography during running in process. Studies show that running in tests carried with a set of identical surface properties are scientific and reasonable than traditional and the test results possess objectivity. Along with the wearing-in process, the surface roughness Ra and scale coefficient C dwindle away while fractal dimension D and characteristic roughness Ra^＊ gather, when achieving the wearing in condition they will achieve the stable value. Furthermore, it not only possesses the same regularity as fractal dimension D and scale coefficient C but also exhibits the higher flexibility for characteristic roughness Ra^＊ to characterize rough surface dur ing running-in process.

关 键 词：磨合 表面形貌 分形维数 尺度系数 特征粗糙度 

分 类 号：TH117.1[机械工程—机械设计及理论]