PCB刀具涂层切削性能对比研究

Comparative Study on Cutting Performance of High-speed Machining Printed Circuit Board Tool Coating

涂层工艺是改善刀具切削性能和降本增效的有效方法。通过制备不同工艺参数的PCB金刚石涂层铣刀,并对其切削铝基板的性能进行对比研究,分析了微细晶的膜厚调制比对刀具寿命的影响以及金刚石涂层相较于类金刚石涂层(DLC)的性能影响。结果表明:微细晶的膜厚调制比对刀具的切削寿命有着决定性影响。在实验参数下,微米晶(MCD)与纳米晶(NCD)的调制比在1:2时刀具寿命仅为60m,微米晶(MCD)、亚微米晶(SMCD)以及纳米晶(NCD)的调制比在1:1:2时刀具寿命可以达到80m不断刀,刀具的失效方式主要为磨粒磨损。在多层薄膜的条件下增加了涂层的抗冲击性能并减少了微米晶带来的刃口不锋利现象。

Coating technology is an effective method to improve the cutting performance of cutting tools and reduce costs.In this paper,PCB diamond-coated milling cutters with different process parameters are prepared,and the performance of cutting aluminum substrates is compared,and the influence of the film thickness modulation ratio of fine crystals on tool life and the comparison of diamond coatings with diamond-like carbons are analyzed.The results show that the film thickness modulation ratio of fine grains has a decisive influence on the cutting life of the cutting tool.Under the experimental parameters,the modulation ratio of microcrystalline(MCD)and nanocrystalline(NCD)is only 60 meters when the modulation ratio is 1:2.When the modulation ratio is 1:1:2,the tool life can reach 90 meters without cutting,and the failure mode of the tool is mainly abrasive wear.Under the condition of multi-layer film,the impact resistance of the coating is increased and the phenomenon of unsharp edges caused by micro-crystals is reduced.