CIP石墨高速加工关键技术及应用研究进展

2018-09-21

作者：周玉海1，2，王成勇1 单位：1广东工业大学；2广州铁路职业技术学院

摘要：各向同性CIP石墨因具有诸多优点而广泛应用于热场、电火花放电、光伏发电等领域，但切削加工时易变形和崩碎断裂、刀具磨损严重且加工精度低。综述已有的各向同性石墨高速切削研究成果，包括石墨微细孔钻削加工、高速加工和切削模型，分析石墨高速铣削的切削力和切削温度特征，得到石墨高速加工硬质合金和CVD金刚石涂层刀具的磨损过程和机理。结合相关研究成果的应用，制定了典型石墨薄壁件铣削加工策略和石墨电极EDM放电加工关键工艺技术，成功加工0.15mm、高度15mm的微细针状石墨电极和薄壁状微细渐开线薄片，实现了石墨精密切削加工。

关键词：CIP石墨；切削机理；刀具磨损；典型加工工艺

中图分类号：TG661；TH162文献标志码：A

Research Progress on Key Technology and Application of HighSpeed Machining CIP Graphite

Zhou Yuhai，Wang Chengyong

Abstract:CIP isotropic graphite has many advantages and is widely used in many fields，such as heat field，mold EDM (Electric Discharge Machining)，photovoltaic power generation.However，the cutting process of graphite is easy to be deformed and broken，and the tool wear is serious and the machining precision is low.The existing research results of graphite high speed machining mechanism are reviewed including the mechanism and the cutting model of graphite micro pore drilling.The cutting force and temperature characteristics are analyzed to get the wear process and mechanism of graphite for high speed machining of hard alloy and CVD diamond coated tool.Based on the research results，a typical graphite thinwalled workpiece milling strategy is worked out and the key technology of graphite precision machining and graphite electrode EDM discharge machining is developed.A fine needle like graphite electrode of0.15mm and 15mm height is successfully processed to realize the precision machining of graphite.

Keywords:CIP graphite；machining mechanism；tool wear；typical processing technology