中文摘要：

微磨削加工中磨粒的微观作用机理对研究微磨具的整体磨损和微磨具使用寿命的预测十分重要。分析电镀金刚石微磨具的磨损机理,针对微磨削区的复合作用过程与微磨具磨损形式的主要特征进行了几何与数学建模。通过考虑最小切屑厚度与尺寸效应等因素后提出并建立了微磨具磨粒微观磨损的数学模型,为了验证此模型的有效性,针对钠钙玻璃材料进行了不同磨削参数下的微磨削试验,分析微磨具磨损前后的磨头直径、磨损与破碎磨粒所占磨粒总数的比例和加工后试件表面粗糙度的变化规律。试验结果表明：加工后的试件表面质量越好磨损越缓慢;随着微磨削试验的进行,微磨具磨头直径经历了快速急剧减小和缓慢稳定减小两个阶段。磨损和破碎磨粒所占比例与磨损速度随主轴转速与进给率增大而增大,磨损和破碎磨粒的比例整体呈线性增长趋势。为提高微磨具的加工性能和延长微磨具的使用寿命提供了理论参考和试验依据。

英文摘要：

Abrasive micro-wear in micro-grinding is very important to research the overall wear and the service life prediction of micro-grinding tool. The wear mechanism of electroplated diamond micro-grinding tool is analyzed. The geometric and mathematical modeling is founded in allusion to the main characteristics of the wear forms and the composite mechanism in micro- grinding zone. The mathematical model of microscopic abrasive wear is established by considering the minimum chip thickness and the size effect. Experiments with different parameters in micro-grinding soda-lime glass are carried out to confirm the validity of the model. The change laws of the worn micro-grinding tool are proposed by analyzing the diameter of grinding head, the proportion in the total abrasives of worn grits and crushed grits, and the surface roughness of the workpiece. The results of test show that the wear is more slowly with better surface quality. The diameter of grinding head fast and sharply decreases first, and then a slow and steady decrease. The wear rate and the proportion of worn grits and crushed grits increase with the increasing of the spindle speed and the feed rate, and the proportion has a linear trend integrally. Significant research theory and experimental reference are provided for improving the processing performance and increasing the service life of micro-grinding tool.