第23卷
第11期
2015年11月
文章编号1004-924X(2015)11-3200-11
光学精密工程
Optics and Precision Engineering
Vol, 23No.11
Nov.2015
Si3N4陶瓷旋转超声磨削加工的表面摩擦特性
荆君涛1，冯平法1，魏士亮2*，王和旭”（1.清华大学机械工程系，北京100084；
2.哈尔滨工程大学机电工程学院，黑龙江哈尔滨154001）
摘要：为了探索结构陶瓷材料在摩擦过程中表面形貌的变化规律及其对摩操特性影响，分析了摩擦过程中材料的接触过程及力学关系，并对旋转超声瘤削加工的SisN，陶瓷试样开展了摩擦表面形貌、摩撤因数等特性的试验研究。首先根据接触特点和材料特性，基于分形理论推导出接触面总载荷计算公式，基于该公式建立了结构陶瓷摩擦因数分形模型。分析结果表明；当初始表面轮廊分形维数分别为1.4，1.45，1.5和1.55时.摩擦因数与摩擦后表面轮席分形维数呈类似正态分布曲线。然后通过旋转超声磨削加工的Si,N，陶瓷试样面面接触摩擦试验，研究了摩擦后陶瓷材料表面微观形貌和摩擦因数变化规律，分析了各因素对擦因数的影响。试验结果表明：产生微观裂纹是SiN，陶瓷摩操后表面微观形貌的显著特点；温度值等于160℃是Si,N。陶瓷摩擦因数由下降转为上升的拐点；当施加载荷为360N和往复频率为
80Hz时，摩擦因数最大。得到的结果为通过表面形貌控制提高结构陶瓷耐磨性能提供了技术支撑。关键调：Si,N，陶瓷；分形雄数；摩擦特性；表面形貌拉制；旋转越声磨制
中图分类号：TH117;TQ174.758.12
文献标识码：A
doi:10.3788/OPE,20152311.3200
Surfacefrictioncharacteristics of
SiN,ceramicsmachined by rotary ultrasonicgrinding
JING Jun-tao',FENG Ping-fa',WEI Shi-liang’·,WANG He-xu
(1.DepartmentofMechanicalEngineering,TsinghuaUniversity,Beijing100084,China;
2.School of Mechanical and Electronic Engineering, HarbinEngineering University,Harbin 15400l,China)*Correspondingauthor，E-mail:weishiliang@hrbeu.edu.cn
Abstract: For investigating on the surface morphology variation of structure ceramic materials and its effect on the friction characteristics during friction, the relationships between contact and mechanical were analyzed in friction process. Meanwhile, the friction characteristics of Sig N, ceramic samples machined by rotary ultrasonic grinding, such as friction surface morphology and friction coefficient were studied with experiments. First, according to the contact characteristics and material properties, the calculation formula of the total load was deduced based on fractal theory. The friction coefficient fractal model was also established on the basis of above. The analysis results shows that the relationship between friction coefficient and surface profile fractal dimension after friction is similar to the normal distribution curve, when the initial surface profile fractal dimension is 1. 4, 1. 45, 1. 5 and
收稿日期：2015-05-15；修订日期：2015-07-13
基金项目：黑龙江省自然科学基金重点项目（No.ZD201313)；“十二五"航天支撑技术预研项目（No.61801060103）