聚晶金刚石刀具切削各向同性热解石墨过程中的磨损机理

摘要/Abstract

摘要：

针对各向同性热解石墨切削过程中刀具磨损过快的问题，采用聚晶金刚石（PCD）刀具进行了切削加工试验。研究了切削过程中PCD刀具的磨损形式、磨损规律以及刀具磨损对表面加工质量的影响。试验结果表明：PCD刀具磨损主要发生在后刀面上，磨损形式为磨粒磨损和氧化磨损。磨损区域可以分为平行沟槽和严重磨损两种形貌。初始磨损阶段，磨损带长度急剧增大，并在切削1200m后进入正常磨损阶段。切削过程中还出现了石墨切屑在磨损区域的黏附堆积和刀具崩刃现象。切削初期,随着切削距离的增大，加工表面粗糙度值急剧增大,切削距离为600m时表面粗糙度达到最大值1.7μm。

关键词: 各向同性热解石墨, 聚晶金刚石刀具, 刀具磨损, 表面粗糙度

Abstract:

According to the rapid tool wear during cutting of isotropic pyrolytic graphite,a turning experiment of isotropic pyrolytic graphite was conducted using PCD tools.The wear formation of PCD tool,tool life and the effects of tool wear on the machined surface were studied.Based on the experimental results and analyses,the results show that the PCD tool wear mainly occurres in the flank face,and the wear forms are abrasive wear and oxidation wear.The wear area can be divided into two kinds of morphology:parallel grooves and severe wear.The length of wear region is increased fast in the first stage. When the cutting distance is larger than 1200m,the cutting tool enters the normal wear stage.Besides,chip accumulation in wear region and tool edge chipping appear in the cutting process.With the increase of cutting distance,the roughness of machined surface increases fast.And the maximum roughness is as 1.7μm when the cutting distance is of 600m.

Key words: isotropic pyrolytic graphite;polycrystalline diamond(PCD) , tool;tool wear;surface roughness

中图分类号:

TH161

王奔, 刘东玺, 王明海, 印文典, 郑耀辉. 聚晶金刚石刀具切削各向同性热解石墨过程中的磨损机理[J]. 中国机械工程, 2015, 26(20): 2721-2729.

Wang Ben, Liu Dongxi, Wang Minghai, Yin Wendian, Zhen Yaohui. Wear Mechanism of PCD Tool during Cutting of Isotropic Pyrolytic Graphite[J]. China Mechanical Engineering, 2015, 26(20): 2721-2729.

参考文献

[1]Wang M H,Wang W,Huang S T,et al.Study on the Mechanism of Diamond Wear in Precision Cutting of Isotropic Pyrolytic Graphite[J].Key Engineering Materials,2012,499:168-172.
[2]康晓峰.各向同性热解石墨切削机理研究[D].沈阳:沈阳航空工业学院,2010.
[3]聂鹏,康晓峰,王明海,等.各向同性热解石墨超精密车削加工机理研究[J].机械设计与制造,2011(6):177-179.
Nie Peng,Kang Xiaofeng,Wang Minghai,et al.Study on Ultra-precision Turning Mechanism for Isotropic Pyrolytic Graphite[J]. Mechanical Design and Manufacturing,2011(6):177-179.
[4]张淑娟,王俐.浅析热解石墨的制造与应用[C]//中国电工技术学会碳—石墨材料专业委员会第十五届学术会议.成都,1994：216-219.
[5]黄荔海,李贺军,李克智,等.碳密封材料的研究进展及其在航空航天领域的应用[J].宇航材料工艺,2006(4):12-17.
Huang Lihai,Li Hejun,Li Kezhi,et al.Research Development and Application of Carbon Sealing Material on Navigation and Spaceflight Field[J].Aerospace Materials & Technology,2006(4):12-17.
[6]吴峻峰,白朔,张海峰,等.各向同性热解炭材料中的缺陷分析和超声检测技术[J].航空材料学报,2011(1):93-96.
Wu Junfeng,Bai Shuo,Zhang Haifeng,et al.Defect Analysis and Ultrasonic Testing of Isotropic Pyrolytic Carbon[J].Journal of Aeronautical Materials,2011,31(1):93-96.
[7]李正操，付晓刚，陈东钺，等. 各向同性石墨结构与工艺条件的关系[J]. 深圳大学学报(理工版)，2010,27(2): 137-141.
Li Zhengcao,Fu Xiaogang,Chen Dongyue,et al.The Relationship of Structure and Processing Condition of Isotopic Graphite[J]. Journal of Shenzhen University(Science &   Engineering),2010,27(2):137-141.
[8]吴峻峰,白朔,刘树和,等.大尺寸各向同性热解炭材料的制备与表征[J].新型碳材料,2006,21(2):119-124.
Wu Junfeng,Bai Shuo,Liu Shuhe,et al.Fabrication and Characterization of Large Isotropic Pyrolytic   Carbons[J].New Carbon Materials,2006,21(2):119-124.
[9]于淑贤,刘明非.石墨电极在SEM下的特征[J].炭素技术,2001(4):19-22.
Yu Shuxian, Liu Mingfei.Characterization of Graphite Electrodes by SEM[J]. Carbon Techniques,2001(4):19-22.
[10]钟启茂.金刚石涂层刀具高速铣削石墨的磨损形态与破损机理[J].工具技术,2009,43(6):36-39.
Zhong Qimao.Wear Form and Breakage Mechanism of Diamond Coated Cutter during High-speed Milling Graphite[J].Tool Engineering,2009,43(6):36-39.
[11]阎秋生.烧结石墨的切削加工性研究[J].汕头大学学报(自然科学版),1994,9(2):53-57.
Yan Qiusheng.A Study on Machineablity of Sintered Graphite Material[J].Journal of Shantou   University(Natural Science Edition), 1994,9(2):53-57.
[12]杨小璠,李友生,鄢国洪,等.超细晶粒金刚石涂层刀具高速铣削石墨的切削性能研究[J].制造技术与机床,2013(6):58-60.
Yang Xiaopan,Li Yousheng,Yan Guohong,et al.Study on Performances of Ultra-fine Grain Diamond Coated Cutter in High-speed Milling Graphite[J].Manufacturing Technology & Machine Tool,2013(6):58-60.
[13]魏莎莎,卢志红.CVD金刚石涂层刀具在石墨加工中的应用[J].燕山大学学报,2006,30(5):403-406.
Wei Shasha,Lu Zhihong.Application of CVD Diamond Film Coated Tools to Machining Graphite[J].Journal of Yanshan University,2006,30(5):403-406.
[14]Masuda M,Kuroshima Y,Chujo Y.The Machinability of Sintered Carbons Based on the Correlation between Tool Wear Rate and Physical and Mechanical Properties[J].Wear,1996,195(1):178-185.
[15]Cabral G,Reis P,Polini R,et al.Cutting Performance of Time-modulated Chemical Vapour Deposited Diamond Coated Tool Inserts during Machining Graphite[J].Diamond and Related Materials,2006,15(10):1753-1758.
[16]周玉海,秦哲,王成勇.金刚石刀具性能及其应用研究[J].机械设计与制造,2009(6):158-160.
Zhou Yuhai,Qin Zhe,Wang Chengyong.Study on Performance and Application of Diamond Tools[J].Mechanical Design and Manufacturing,2009(6):158-160.
[17]邵芳,刘战强,万熠,等.基于热力学的PCD刀具加工ZL109铝合金的扩散磨损[J].天津大学学报,2010,43(4):315-321.
Shao Fang,Liu Zhanqiang,Wan Yi,et al.Diffusion Wear for PCD Tools Cutting Aluminum Alloy ZL109 Based on Thermodynamics[J]. Journal of Tianjin University,2010,43(4):315-321.
[18]白清顺,姚英学,Phillip Bex,等.聚晶金刚石刀具加工强化复合地板时的切削性能及磨损机理研究[J].摩擦学学报,2003,23(2):81-85.
Bai Qingshun,Yao Yingxue,Phillip Bex,et al.Wear Mechanism and Cutting   Performance of Polycrystalline Diamond Tool in Machining High Pressure Laminated Flooring[J].Tribology,2003,23(2):81-85.
[19]石文天,刘玉德,丁悦,等.PCD刀具微细车削硬铝合金的表面质量研究[J].机床与液压,2011,39(17):15-17.
Shi Wentian,Liu Yude,Ding Yue,et al.Research of Surface Quality in Micro-turning Aluminum Alloy Using PCD Tools[J]. Machine Tool & Hydraulics,2011,39(17):15-17.
[20]刘珅琢,李勇,寇自力.PCD刀具连续切削花岗岩的性能研究[J].工具技术,2012,46(9):23-26.
Liu Kunzhuo,Li Yong,Kou Zili.Study on Perfor-mance of PCD Cutting Tools in Continues Cutting for Granite[J]. Tool Engineering, 2012, 46(9): 23-26.
[21]任文祥,吴玉厚,赵德宏,等.PCD刀具切削天然大理石的磨损特性研究[J].金刚石与磨料磨具工程,2013,33(3):56-59.
Ren Wenxiang,Wu Yuhou,Zhao Dehong,et al.Wear Characteristics of PCD Tools When Cutting Natural Marble[J].Diamond & Abrasives Engineering,2013,33(3):56-59.
[22]张岩,吕反修,贺琦,等.PCD和CVD金刚石刀具切削性能对比及失效机理初探[J]. 金刚石与磨料磨具工程,2009(1):49-52.
Zhang Yan,Lü Fanxiu,He Qi,et al.Comparison of Cutting Performances and Failure Mechanism of PCD and CVD Diamond Tools[J]. Diamond & Abrasives Engineering,2009(1): 49-52.
[23]孟剑锋,李剑峰,孟磊.金刚石工具加工硬脆材料时的磨损及其影响因素的研究现状[J].工具技术,2004,38(3):6-8.
Meng Jianfeng, Li Jianfeng, Meng Lei. Present State of Research on Wear of Diamond Cutting Tools When Cut Hard and Brittle Material and Its Influence Factor[J].Tool Engineering,2004,38(3):6-8.