188宝金博页面版

doi:10.11933/j.issn.1007-9289. 20160803002 高速球铣路径对淬硬钢 SKD11 表面摩擦特性的影响* 黄为民1,2 ，赵 军 1,2 ，艾 兴 1,2 ，王大伟 1,2 ，王桂杰 1,2 （1. 山东大学 机械工程学院，济南 250061；2. 山东大学 高效洁净机械制造188宝金博页面版部重点实验室，济南 250061） 摘 要： 通过高速铣削试验与环-块摩擦磨损试验，借助白光干涉仪、超景深三维显微镜、显微硬度计等分析检测设备，研究了走刀路径对淬硬模具钢 SKD11 表面摩擦特性的影响。结果表明：球铣加工表面摩擦特性具有方向性，当走刀方向与摩擦方向垂直时，摩擦因数最。ズ劭矶茸钫，当二者夹角成 45°时，摩擦因数最大，磨痕宽度最宽。球铣走刀路径影响加工表面形貌取向，表面形貌通过改变接触应力和磨屑捕捉能力来影响犁耕效应和黏着效应，进而影响摩擦特性。干摩擦工况下，主要磨损机理是磨粒磨损与氧化磨损，试验 15 min 后表面微沟槽形貌均已消失；而润滑工况下，表面微沟槽依然清晰，走刀路径与摩擦方向夹角成 0°与 45°试样表面出现磨粒磨损特征，而夹角成 90°试样表面无明显划痕，表明采用该路径进行球铣加工具有较好的减磨效果。 关键词： 高速球铣；刀具路径；摩擦因数；磨损形貌；磨损机理 中图分类号： TG543；TH117.1 文献标识码： A 文章编号： Effects of Tool Path on Tribological Behavior of High-speed Ball Milled Surfaces of Hardened SKD11 Steel HUANG Wei–min 1,2 , ZHAO Jun 1,2 , AI Xing 1,2 , WANG Da–wei 1,2 , WANG Gui–jie 1,2 (1. School of Mechanical Engineering, Shandong University, Jinan 250061; 2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan 250061) Abstract: Effect of cutting tool path on tribological behavior of high speed ball milled surfaces of hardened SKD11 steel was investigated through ring-on-block friction and wear tests with the help of white light interferometer, super-high magnification lens zoom 3D microscope and microhardness tester. The results showed that tribological behavior of ball milled surface has direction tendency. A minimum friction coefficient and wear width was reached when the sliding direction was perpendicular to the tool path direction. However, a maximum friction coefficient and wear width was achieved when the intersection angle between siding direction and tool path direction was 45 degrees. Topography direction of ball milled surface was determined by the cutting tool path, which influenced the contact stress and ability of trapping wear debris and then the ploughing and sticking effect. Main wear mechanism was dominated by abrasive wear and oxidative wear under dry sliding condition. In addition, micro-grooves induced by ball end milling process vanished absolutely after sliding for 15 minutes. Nevertheless, micro-grooves were clearly observed though some abrasive wear characteristics were presented on the samples where the intersaction angle equaled to 0° and 45°. Samples obtained with the angle 90° scarcely showed any scratches and indicated a good anti-attrition ability. Key words: high speed ball milling; cutting tool path; friction coefficient; wear topography; wear mechanism 收稿日期：2016–08–03; 修回日期：2017–05–08 网络出版日期： 网络出版地址： 通讯作者：赵军（1967—），男（汉），教授，博士；研究方向：高效加工技术及数控刀具技术；E-mail ：zhaojun@sdu.edu.cn 基金项目：山东省科技发展计划项目（2014GGX103041） Fund: Supported by the Science and Technology Development Program of Shandong Province (2014GGX103041). 引文格式：黄为民, 赵军, 艾兴, 等. 高速球铣路径对淬硬钢SKD11表面摩擦特性的影响[J]. 中国表面工程, 2017, 30(1).doi:10.11933/j.issn.1007-9289. 20160803002 HUANG W M, ZHAO J, AI X, et al. Effects of tool path on tribological behavior of high-speed ball milled surfaces of hardened SKD11 steel [J]. China Surface Engineering, 2017, 30(1). doi:10.11933/j.issn.1007-9289. 20160803002http://kns.cnki.net/kcms/detail/11.3905.TG.20170508.1646.004.html网络出版时间：2017-05-08 16:46:56