用于碳纤维复合材料钻削的金刚石涂层刀具制备及结构优化  

Preparation and Structural Optimization of Diamond-Coated Tools for CFRP Drilling

作　　者：佘俊杰 吴宗 She Junjie;Wu Zong(OKE Precision Cutting Tools Co.,Ltd.,Zhuzhou Hunan 412000,China)

机构地区：[1]株洲欧科亿数控精密刀具股份有限公司,湖南株洲412000

出　　处：《硬质合金》2024年第2期140-147,共8页Cemented Carbides

摘　　要：本文针对传统硬质合金涂层刀具钻削碳纤维复合材料(CFRP)使用寿命短、加工后工件易产生毛边等缺陷、孔加工粗糙度波动大的问题,制备并对比了不同涂层结构和不同刃口结构的金刚石涂层刀具的加工性能。结果表明,利用金刚石涂层刀具进行CFRP材料的钻削加工时,微晶金刚石(MCD)/纳米金刚石(NCD)复合结构比单一MCD涂层结构的耐磨性更好,使用寿命更长;通过减小钻头倒锥、钻尖角,增大槽前角、钻尖容屑槽前角和背宽优化刃口结构后,金刚石涂层刀具加工孔径粗糙度平均值显著降低,粗糙度极差由4.105µm下降至0.848µm。This paper addresses the problems of the short service life of traditional carbide-coated tools for carbon fiber composite(CFRP)drilling,defects such as burrs on the processed workpiece,and large fluctuations in hole machining roughness.The machining performance of diamond-coated tools with different coating structures and different edge structures was prepared and compared.The results show that when diamond-coated tools are used for drilling CFRP materials,the composite structure of microcrystalline diamond(MCD)/nano-crystalline diamond(NCD)has better abrasion resistance and longer service life than a single MCD-coated structure;the cutting edge structure can be optimized by decreasing the inverted cone of the drill bit and the angle of the tip and increasing the front angle of the slot,the front angle and width of the back of of the chip pocket at drill tip.The average roughness of the machined hole diameter of the diamond-coated tools with optimized cutting edge structures is significantly reduced,and the roughness extreme difference is reduced from 4.105μm to 0.848μm.

关 键 词：金刚石涂层刀具 复合材料 钻削加工 

分 类 号：TB332[一般工业技术—材料科学与工程] TG711[金属学及工艺—刀具与模具]