摘要
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。
Grinding test was can＇ied out to study on grinding granite with single diamond grain. Forces were measured to investigate the mean normal and tangential forces acted on the diamond grain. The relationship between the forces and either spindle speed or the maximum thickness of the undeformed chip produced by a diamond grain was discussed. The digital models of granite were constructed by discrete element method. Based on the model, a two-dimen- sional and a three-dimensional analysis were carried out to simulate the grinding process with the single diamond grain. The simulation results were compared with experimental data, and some useful conclusions were obtained： the three-dimensional results agree well with the experiment data at the same V, and large h as well as the same h and large V, ; the three-dimensional and two-dimensional results are comparable to the experiment data at other machining parameters.
出处
《机械设计与研究》
CSCD
北大核心
2011年第1期73-76,共4页
Machine Design And Research
