非球面磨削过程中圆弧形砂轮的磨损分析

针对砂轮磨损会严重影响非球面磨削质量的问题，基于非球面磨削的运动方式，解析了非球面磨削过程中的材料去除体积和砂轮磨损体积公式，并结合砂轮磨损实验，探究非球面磨削用圆弧形金刚石砂轮的磨损规律。结果表明:圆弧形金刚石砂轮在磨削非球面过程中由于磨损会导致其径向尺寸减小，在砂轮失效前其直径变化主要存在3个阶段:即直径快速变化阶段、缓慢变化阶段和微量变化阶段。圆弧形砂轮表面的结构特性，使得砂轮圆弧顶端的结合剂对顶端区域的磨粒把持力要低于其他磨粒的，导致该区域的磨粒和结合剂被快速磨损，直至圆弧形金刚石砂轮的几何结构不再影响其结合剂对磨粒的把持力，此后其磨损过程与平面金刚石砂轮磨损类似。 

Wear analysis of arc-sharped wheel in aspheric grinding process

Aiming at the problem that grinding wheel wear will seriously affect the aspheric grinding quality, the formulas of material removal volume and grinding wheel wear volume in aspheric grinding process are analyzed based on the motion mode of aspheric grinding.The wear law of arc-sharped diamond grinding wheel for aspheric grinding is studied by combining with grinding wheel wear test.The results show that the radial dimension of arc-sharped diamond grinding wheel decreases due to wear during aspheric grinding, and there are three main stages of its diameter change before the failure of the grinding wheel, namely rapid change stage, slow change stage and micro change stage. Besides, the holding force of the bond to diamonds in the top of arc is less than those of other diamonds because of structural characteristics of arc-sharped wheel, which leads to rapid wear of diamond abrasives and bond until the holding force is not affected by the characteristics of arc-sharped wheel. At that time, the wear process of arc-sharped wheel is similar as the wear process of the plane wheel.