CVD涂层刀具高速铣削大理石试验

Experiment on high speed milling marble using CVD coating tools

为了探索高速铣削大理石的切削特性,改善大理石加工表面质量,使用CVD氮化钛涂层刀具进行高速铣削大理石试验。通过显微镜观测刀具磨损表面,并采用网格法计算出刀具磨损面积,探讨切削参数的改变与刀具磨损情况的关系;利用粗糙度测试仪检测大理石加工表面粗糙度,研究切削参数对大理石加工表面质量的影响。最终得到刀具磨损量和大理石表面粗糙度均与切削速度负相关,与进给速度和切削深度正相关。试验结果表明:所建立的数学模型显著性很高,能够较准确地揭示刀具磨损量和大理石表面粗糙度与切削参数间的关系,为合理选择切削参数以提高大理石加工表面质量提供了一定理论基础。

The paper aims to explore the cutting characteristics of high speed marble and to improve the sur- face quality of marble processing. A high speed milling marble test using CVD titanium nitride coating was carried out. To study the relationship between the cutting parameters and the tool wear conditions, the tool wear surfaces were observed through the microscope and the tool wear areas were calculated by the grid method. The machined marble surface roughnesses were detected by the roughness tester to probe the influence of the cutting parameters on the marble surface quality. It＇ s found that the tool wear losses and the marble surface roughness have negative correlation with the cutting speed, but positive correlation with the feed rate and the cutting depth. The experimental results show that the established mathematical models are significant in revealing the relationships between the cutting parameters and the tool wear losses and the marble surface roughness. Therefore it provides a theoretical basis for the proper selection of cutting parameters to improve the surface quality of marble processing.