PCD微细刀具的皮秒激光加工特性研究  

Research on Picosecond Laser Processing Characteristics of PCD Micro Tools

作　　者：夏浥 郭语[1] 李晓晖[1] 周金宇 何宁[2] Xia Yi;Guo Yu;Li Xiaohui;Zhou Jinyu;He Ning(School of Mechanical and Electrical Engineering,Jinling Institute of Technology,Nanjing 211169,China;不详)

机构地区：[1]金陵科技学院机电工程学院,南京市211169 [2]南京航空航天大学机电学院

出　　处：《工具技术》2024年第12期37-45,共9页Tool Engineering

基　　金：江苏省高校自然科学基金(23KJB460015)。

摘　　要：锋利且耐磨的微细刀具在高精密微细加工中扮演着不可或缺的角色。金刚石材料因卓越的硬度及导热性能、极高的耐磨性而备受推崇,因此被广泛应用于制造锋利耐用的切削刀具。近年来,金刚石微细刀具已成为研究的焦点,但其制备复杂、成本高昂等问题限制了大规模商业化应用。本研究采用皮秒脉冲激光制备聚晶金刚石(PCD)微细刀具,系统研究了激光切割参数,包括脉冲能量、脉冲间距、激光波长以及材料特性(如PCD晶粒尺寸等)对加工结果的影响。揭示了皮秒脉冲激光加工PCD刀具刃口及表面的形成机理。皮秒激光加工后的PCD表面粗糙度达到Ra 200nm,制备出的PCD微细刀具具有良好的无氧铜及硬质合金切削性能。Sharp and wear-resistant micro cutting tools play an indispensable role in high-precision micro machining.Diamond material is highly regarded for its outstanding hardness,excellent wear resistance,and remarkable thermal conductivity,making it widely used in the production of sharp and durable cutting tools.In recent years,diamond micro cutting tools have become the focus of research,but their complex preparation process and high cost have limited their large-scale commercial application.In this study,polycrystalline diamond(PCD)micro cutting tools are prepared using picosecond-pulse laser.The influence of laser cutting parameters,including pulse energy,pulse spacing,and laser wavelength,as well as material characteristics such as PCD grain size,on the machining results is systematically investigated.Through in-depth research,the mechanism of the formation of the cutting edge and surface of PCD tools after picosecond laser processing is revealed.The surface roughness of the processed PCD reached Ra 200nm,and the prepared PCD micro cutting tools exhibited excellent cutting performance for oxygen-free copper and carbide.

关 键 词：聚晶金刚石 微细刀具 皮秒激光 微细加工 

分 类 号：TG711[金属学及工艺—刀具与模具] TH162[机械工程—机械制造及自动化]