单晶金刚石微型刀具刃磨试验研究

Experiment study on single crystal diamond micro-tool sharpening

刀具刃磨质量是影响零件加工质量的重要因素之一。为提高单晶金刚石刀具刃磨质量,采用铜盘、铁盘、铜基碳化钨盘和铝基碳化硅盘四种不同的磨盘进行刃磨对比试验。观测分析刃磨后磨盘的表面形貌、材料去除率和刀具的刃口形貌、圆弧半径。结果发现:铜盘和铁盘刃磨过程中不能保证单晶金刚石的完整性,铜基碳化钨盘和铝基碳化硅盘加工可以获得较好的刀具质量。而铜基碳化钨盘通过促进单晶金刚石的氧化反应,在刃磨后获得的刀具刃口圆弧半径稳定在1μm以内。

The sharpness of the tool cutting edge is one of the important factors affecting the quality of the product.To improve the quality of cutting edge and increase the processing efficiency,four different types of scaife,namely copper scaife,iron scaife,copper based tungsten carbide scaife and aluminum based silicon carbide scaife,are used in the experiments for an optimized selection.The surface topography and materiall removal rate of ground scaife,as well as edge radius and surface topography of single crystal diamond micro-tool are investigated for each experiment,respectively.The experimental results show that the better cutting edge,higher surface quality and quicker material removal rate could be achieved when using copper based tungsten carbide scaife,and the edge radius can be stabilized at less than 1μm.It′s also shown that tool quality is relatively good when processed by aluminum based silicon scaife,while using copper scaife and iron scaife could not ensure the integrity of single crystalline diamond.