聚晶金刚石刀具加工强化复合地板时的切削性能及磨损机理研究

通过对聚晶金刚石刀具加工A1203表层强化复合地板的试验研究，分析了金刚石粒度对聚品金刚石刀具切削性能的影响以及刀具的磨损机理。结果表明：随着金刚石粒度的增大，聚晶金刚石刀具的耐磨性能增强；聚晶金刚石刀具在加工过程中的磨损机理主要表现为具有疲劳磨损特征的沿品断裂及局部解理断裂．品间微裂纹是导致聚晶金刚石刀具磨损的主要因素．

Wear Mechanism and Cutting Performance of Polycrystalline Diamond Tool in Machining High Pressure Laminated Flooring

The influence of polycrystalline diamond particle size on the cutting performance and wear mechanism of the cutting tool in the machining of high pressure laminated (HPL) flooring was investigated on a Liwei FXZ202 test rig, by brazing five types of SYNDITE polycrystalline diamonds (PCD) into one cutting tool for HPL flooring. The wear volume loss and worn surface profile of the cutting tool at a certain linear cutting distance were determined with an optical microscope and a scanning electron microscope, respectively. The results showed that the cutting tool made of PCD with coarser diamond particles had better wear resistance than the one made of PCD with finer particles. The cutting tool was characterized by intercrystalline fracture attributed to fatigue and partial cleavage fracture in the machining process. The cracks between the crystalline particles had great effect on the wear resistance of the PCD cutting tool.