快速点磨削侧边接触层模型及CBN砂轮磨损特性  

Model of Side Contact Layer and Wear Performance of CBN Wheel in Quick-point Grinding Process

作　　者：修世超[1] 蔡光起[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004

出　　处：《机械工程学报》2010年第3期187-192,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50775032);辽宁省科学技术基金(20072030)资助项目

摘　　要：根据点磨削原理和技术特征,讨论薄层CBN砂轮侧边实际接触区在材料去除过程中的作用,建立快速点磨削侧边接触区几何模型,对侧边接触区工件等效直径、几何与动态接触弧长、单颗磨粒切削深度、平均切屑断面积等接触层参数进行数学建模与解析。结合快速点磨削加工试验研究结果,分析侧边接触层参数对快速点磨削过程的影响机理及薄层CBN点磨削砂轮的磨损特征及规律。结果表明,点磨削过程中材料的去除主要是在侧边接触区内完成,薄层CBN点磨削砂轮的最大磨损速率发生在砂轮侧边最大直径处。Based on the principle and technical characteristcs of point grinding process, the function of the side contact area of the thin CBN point-grinding wheel in material removal process is discussed, and the geometry and parameters models of the side contact area are established. Mathematic modeling and analysis are carried out for the side contact layer parameters, such as the equivalent workpiece diameter, the geometric and dynamic contact arc length, cutting depth of single abrasive grain and average cross-sectional area of chips. The grinding experiment is carried out to study the mechanism of effect of side contact layer parameters on the quick point grinding process and the wear characteristic and rule of thin CBN point-grinding wheel. It is found that the material removal is mainly completed in the side contact layer and the maximum wear rate of the thin CBN point-grinding wheel occurs at the largest circumference of wheel side in the point grinding process.

关 键 词：快速点磨削 侧边接触层 模型 磨削试验 砂轮磨损 

分 类 号：TG580[金属学及工艺—金属切削加工及机床]