赵彦玲　张经纬　侯新新　潘承怡　孙蒙蒙

摘要：针对钢球缺陷检测过程中，镜面钢球打滑导致展开轮磨损这一问题，结合试验与有限元的方法，得到适合于展开轮的材料与微结构。首先，应用激光微造型技术在不同材料表面加工圆形凹坑微结构，采用单因素法在M2000多功能磨擦磨损试验机上进行滚滑复合干摩擦试验；结合试验工况建立基于Archard理论的微结构磨损模型；最后通过仿真技术模拟试验优选的材料在不同微结构表面的磨损性能，进而对微结构进行优选。结果表明：在滚滑复合干摩擦工况下，圆形凹坑微结构可以改善不同材料的摩擦磨损性能；利用磨损模型计算磨损系数能够应用于有限元中用以分析实际工况的磨损特性；优选出T10A和45钢在三角形和菱形微结构表面下具有较好的耐磨性能。为轮系结构耐磨材料及微结构表面的选取提供理论参考。

关键词：钢球展开轮；微结构；单因素试验；滚滑复合摩擦；磨损模型

DOI：10.15938/j.jhust.2018.05.002

中图分类号： TH1171

文献标志码： A

文章编号： 1007-2683（2018）05-0008-06

Abstract：The problem of the unfolding wheel wear in the defect detection process caused by mirror ball slipping is solved by combining test and finite element method to obtain the materials and microstructures suitable for the unfolding wheel First， laser texturing technology is used to process circular pit microstructures on the surface of different materials Single factor analysis method is used to carry out rollingslipping compound friction test on M2000 multifunctional friction and wear tester； Combining test conditions， the wear model of microstructures is established based on the Archard theory； Finally， The wear characteristics of different microstructures on the test preferred materials are simulated by simulation， thereby optimizing the microstructures The results show that 1）under the rollingslipping compound friction condition， the friction and wear behavior of different materials can be improved by the circular pit microstructures； 2）The wear model can calculate the wear coefficient， which is used to analyze the wear properties in finite element under actual working conditions； 3）The optimized triangle and diamond microstructures on the surface of T10A and 45 steel can show good wear resistance The theoretical reference is provided for the selection of wear resistant material and microstructures surfaces of gear trains

Keywords：steel ball unfolding wheel； pit microstructure； single factor test； ollingslipping compound friction； wear model

0引言

展開轮是钢球检测机构中的核心部件，通过摩擦传递力和运动以实现钢球的全表面展开，钢球与展开轮均为光滑表面，在展开过程中极易因打滑而导致钢球无法全表面展开，同时展开轮长期受到摩擦磨损、局部重力载荷作用而致其失效，因此对展开轮接触面增摩降磨特性的分析十分必要[1-3]。本文目的是研究在降低展开轮磨损程度的同时还要保证其在工作过程中具有足够的摩擦力，而目前国内外对材料在干摩擦条件下既增大摩擦系数又降低磨损程度的研究较少[4]。……