论文部分内容阅读
本文首先利用断裂力学的理论,分析了聚晶金刚石刀具切削过程中的沿晶和解理两种磨损特征及其形成过程。通过采用SYNDITE聚晶金刚石刀具对Al_2O_3颗粒表层强化复合地板的切削加工实验,验证了理论分析的正确性。研究表明聚晶金刚石刀具铣削Al_2O_3表层强化复合地板的过程中,刀具的磨损特征主要由沿晶磨损和解理磨损组成。并且,理论和实验结果表明刀具的磨损特征受到金刚石晶粒尺寸的影响。粗粒度聚晶金刚石易产生解理磨损形貌,细粒度的聚晶金刚石易产生沿晶磨损形貌。同时,研究表明微观裂纹特征对聚晶金刚石刀具的磨损起着重要的作用。
In this paper, fracture mechanics theory is first used to analyze both the wear characteristics and the formation process of intercrystalline and cleavage during the cutting process of polycrystalline diamond tool. By using SYNDITE polycrystalline diamond tool on Al 2 O 3 particle surface laminate floor cutting experiment, verify the theoretical analysis of the correctness. The research shows that in the process of polycrystalline diamond tool milling Al_2O_3 surface laminate floor, the wear characteristics of the tool are mainly composed of intergranular wear and cleavage wear. Moreover, theoretical and experimental results show that the wear characteristics of the tool are affected by the diamond grain size. Coarse grain polycrystalline diamond tends to produce cleavage wear morphology, fine grain polycrystalline diamond prone to wear along the grain morphology. At the same time, studies have shown that microcrack characteristics play an important role in polycrystalline diamond tool wear.