新型CVD金刚石涂层刀具铣削高性能各向同性石墨研究

Study on high-performance isotropic graphite milling for new CVD diamond coated tool

利用自主研发的新型CVD金刚石复合涂层刀具对自行研制的高密高强各向同性石墨材料进行了铣削加工试验,对比测试了新型CVD金刚石复合涂层刀具与PCD刀具的切削性能。试验结果表明,PCD刀具铣削加工25min其后刀面磨损已超过磨钝标准0.3 mm,新型CVD金刚石复合涂层刀具加工到45 min时,其后刀面磨损量仅为0.25 mm,这说明新型CVD金刚石复合涂层刀具高速铣削石墨时表现出良好的耐磨性和使用寿命,可以适应高性能各向同性石墨的加工需求。铣削加工试验还发现新型CVD金刚石复合涂层刀具加工的石墨表面质量在初期不如PCD刀具,但在更长时间加工情况下,其加工表面质量优于PCD刀具。

In this paper,the new CVD diamond composite coating tool milling experiment of the self-developed high density and high strength isotropic graphite material was carried out,and the cutting performance of the new CVD diamond composite coating tool and PCD tool were compared.The test results show that the flank wear has exceeded the standard 0.3 mm after the PCD tool milling processing 25 min.,while the flank wear is only 0.25 mm after the new CVD diamond composite coating tool processing to 45 min.,which shows that the new CVD diamond composite coating tool is of good wear and service life in high-speed milling graphite,and can adapt to the processing requirement of high performance isotropic graphite.It was also found that the graphite surface quality of the new CVD diamond composite coating tool was inferior to PCD tool in the initial milling stage,but the machining surface quality was better than PCD tool in the longer processing time.