高速球铣路径对淬硬钢SKD11表面摩擦特性的影响

发布时间：2018-04-12 14:16

  本文选题：高速球铣 + 刀具路径　； 参考：《中国表面工程》2017年03期

【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,摩擦因数最小,磨痕宽度最窄,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。
[Abstract]:By means of high-speed milling test and ring-block friction and wear test, with the aid of white light interferometer, three dimensional hyperfield microscope and microhardness tester, the influence of tool path on the surface friction characteristics of hardened die steel SKD11 was studied.The results show that the friction characteristics of the milling surface are directional. When the walking direction is perpendicular to the friction direction, the friction coefficient is the smallest and the wear mark width is the narrowest. When the angle between them is 45 掳, the friction coefficient is the largest and the wear mark width is the widest.The path of the ball milling tool affects the orientation of the machined surface. The surface morphology affects the ploughing effect and the adhesion effect by changing the contact stress and the debris trapping ability, thus affecting the friction characteristics.Under dry friction condition, the main wear mechanism is abrasive wear and oxidation wear. After 15 min test, the surface micro-groove morphology has disappeared, but under lubrication condition, the surface micro-groove is still clear.The wear characteristics of the surface of the specimen with the angle of 0 掳and 45 掳between the path of the tool and the direction of friction, and the angle of 90 掳, have no obvious scratch on the surface of the specimen, which indicates that the wear reduction effect is better by using this path in the ball milling process.
【作者单位】： 山东大学机械工程学院;山东大学高效洁净机械制造教育部重点实验室;
【基金】：山东省科技发展计划项目(2014GGX103041)~~
【分类号】：TG142.12;TG54
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本文编号：1740097