微磨具磨削钠钙玻璃的磨损机理实验研究

建立了微磨削过程中单颗磨粒的磨损数学模型,通过观测微磨具磨削前后直径变化、表面形貌变化及加工前后试件的表面质量,分析了微磨削过程中不同阶段磨粒的磨损情况.利用粒度500~#微磨具对钠钙玻璃进行单因素磨损实验,研究不同的磨削影响因素对微磨具磨损的影响规律.实验结果表明:随着磨削速度和进给速度增大,磨粒的磨损和破碎现象加剧;随着去除材料体积的增加,微磨具直径先是急剧减小,而后呈线性减小趋势;加工表面的粗糙度随着去除工件体积的增加总体呈下降趋势.研究结果为提高微磨具的使用寿命和加工性能提供了理论参考和实验依据.

Experimental Research on Wear Mechanism of Micro-grinding Tool in Grinding Soda-Lime Glass

Single grain abrasive wear model is established for the micro grinding process. The abrasive wear at different stages in micro-grinding process is analyzed by the observation toward the diameter variation and the surface appearance of the micro-grinding tools as well as the surface quality variation of the workpieces. Tool wearing influence rules caused by various grinding influence factors are also studied through single-factor experiments on soda-lime glass， with ^#500 particle size micro-grinding tools adopted. The experiment results indicate that the wear and breakage of abrasive grains are increased as long as the feed speed and feed rate increase during the micro grinding process. In addition， as the material removal volume increases， the diameter of the micro grinding tool decreases sharply at first， and then decreases linearly. Generally， a decrease trend of the roughness value is observed form the machine surface. The achievements of this paper provides theoretical and experimental basis for increasing working life and improving processing performance of micro-grinding tool.