对花岗石G603进行了单颗粒金刚石磨削实验。通过测量磨削力对单颗金刚石磨粒所承受的平均法向力和切向力进行了研究,分析了不同磨削深度h_(max)、主轴转速V_s与磨削力和花岗石表面裂纹萌芽扩展的关系。利用离散单元方法(DEM)构造了G603的数字模型,基于该模型对单颗金刚石磨削花岗石进行了2维和3维动态模拟,比较分析了两种模拟数据与实验数据,结果表明:V_s相同但h_(max)较大时,以及h_(max)相同但V_s较小时,3维模拟结果更接近于实验值;其他参数情况下2维和3维模拟结果与实验值基本吻合。 Granite G603 single grain diamond grinding experiments. The average normal force and tangential force on the single diamond abrasive were measured by measuring the grinding force. The effects of different grinding depth h max, spindle speed V s, grinding force and granite surface crack Sprout expansion of the relationship. The digital model of G603 was constructed by using discrete element method (DEM). Based on the model, two-dimensional and three-dimensional dynamic simulation of single diamond granite was carried out. Two simulation data and experimental data were compared and analyzed. The results showed that V_s The results of the two-dimensional and three-dimensional simulations agree well with the experimental values ​​when the h_ (max) is the same and the h_ (max) is the same but the V_s is small.