聚晶金刚石复合片电火花线切割加工电极丝损耗研究

摘要/Abstract

摘要： 采用电火花线切割方法对聚晶金刚石复合片（PDC）进行了线切割加工实验，利用带能谱分析的扫描电子显微镜(SEM)观察了电极丝表面的显微形貌。从微观角度研究了PDC超硬材料电火花线切割加工的电极丝损耗机理，探讨了电参数和冲液条件等因素对电极丝损耗的影响。实验研究发现，采用贴附式高压喷液方式在高电压、小脉宽、大峰值电流的加工条件下，PDC切割效率为19.35mm2/min，电极丝损耗为1.5~2μm(104mm2切割量)，较常压喷液方式切割效率提高51.6%，丝损降低15.2%。

关键词: 聚晶金刚石复合片, 电火花线切割, 电极丝损耗, 差动放电, 间隙流场

Abstract: The authors carried out the wire cutting machining experiments of PDC using WEDM, and observed the surface micro morphology of wire electrode with the SEM which might analyze the energy spectrum. The electrode wire wear mechanism of PDC ultra hard material was studied from the microscopic points of view, and the influences of the electrical parameters and the conditions of the washing liquid on the wire wear were discussed. It is found that the attached type high pressure liquid spraying mode, in the processing conditions of high voltage, small pulse width, high peak current, PDC cutting efficiency is as 19.35 mm2/min,the electrode wire wear is as 1.5~2μm (for 104mm2 cutting volume). The cutting efficiency is increased by 51.6% compared with the normal pressure liquid injection method, and the reduction of the wire wear by 15.2%.

Key words: polycrystalline diamond compact(PDC), wire electric discharge machining(WEDM), wire electrode wear, differential discharge, gap flow field

中图分类号:

TG661
TQ164

滕凯, 孙涛, 赵恩兰, 何敏. 聚晶金刚石复合片电火花线切割加工电极丝损耗研究[J]. 中国机械工程.

Teng Kai, Sun Tao, Zhao Enlan, He Min. Study on Electrode Wire Wear during WEDM Processes by PDC[J]. China Mechanical Engineering.

参考文献

[1]陈晶晶. 聚晶金刚石复合片(PDC)显微结构与性能的研究[D]. 武汉:武汉理工大学,2010.

[2]宋满仓,张建磊,于超，等. 聚晶金刚石复合片的电火花线切割精密加工试验[J]. 光学精密工程,2012,20(6): 1303-1309.

Song Mancang, Zhang Jianlei,Yu Chao,et al.Experiment of WEDM Precision Machining for Polycrystalline Diamond Compact[J]. Optics and Precision Engineering,2012,20(6): 1303-1309.

[3]陈姿伶.多晶钻石之线切割电火花加工研究[D].台北:台湾大学,2008.

[4]张高峰,邓朝晖.聚晶金刚石复合片的电火花线切割机理与形貌[J]. 中国机械工程,2007,18(6): 671-675.

Zhang Gaofeng, Deng Zhaohui. Cutting Mechanism and Surface Appearance of PDC with WEDM[J].China Mechanical Engineering,2007,18(6): 671-675.

[5]吴煜,张高峰. 聚晶金刚石的Nd:YAG激光切割与电火花线切割损伤分析[J]. 中国机械工程,2010,21(9): 1034-1039.

Wu Yu, Zhang Gaofeng. Damage Analysis of PDC Cutted by Nd:YAG Laser and WEDM[J].China Mechanical Engineering, 2010,21(9): 1034-1039.

[6]Suzuki K,Shiraishi Y,Nakajima N,et al.Development of New PCD Made Up of Boron Doped Diamond Particles and Its Machinability by EDM[J].Advanced Materials Research， 2009,76:684-689.

[7]马伟. 电火花线切割加工电极丝损耗机理与实验研究[D]. 哈尔滨:哈尔滨工业大学,2010.

[8]申晓龙,任成高. 提高数控线切割加工聚晶金刚石刀具材料效率的措施[J]. 湖南工业职业技术学院学报,2010,10(2): 4-6.

Shen Xiaolong, Ren Chenggao. Measures to Improve the Processing Efficiency in CNC Wire Cutting Polycrystalline Diamond Materal[J]. Journal of Hunan Industry Polytechnic, 2010,10(2): 4-6.

[9]杨晓冬,滕庆. 移动热源作用下电火花线切割加工电极丝三维温度场模拟[J]. 电加工与模具,2011,7(6): 7-11.

Yang Xiaodong, Teng Qing. 3D Temperature Field Simulation of Wire Electrode in WEDM under the Moving Heat Source[J].Electromachining & Mould,2011,7(6): 7-11.

[10]范圣耀. 高速走丝多次线切割电极丝动态特性及形位稳定技术研究[D]. 无锡:江南大学,2013.

[11]范圣耀,张秋菊,陈海卫.多次切割电极丝在流体中动态特性研究[J]. 振动与冲击,2013,32(10): 105-110.

Fan Shengyao， Zhang Qiuju, Chen Haiwei. Dynamic Characteristics of Multi-cutting Electrode Wire in Fluids[J]. Journal of Vibration and Shock, 2013,32(10): 105-110.

[12]毛聪,孙小丽,卢继，等. CBN-WC-10Co刀具材料的电火花线切割机理[J].中国机械工程,2015,26(12): 1645-1651.

Mao Cong, Sun Xiaoli, Lu Ji, et al. On Cutting Mechanism of CBN-WC-10Co Composite Cutting Tool Material with WEDM[J].China Mechanical Engineering,2015,26(12): 1645-1651.

[13]于家珊. 电火花加工理论基础[M].北京:国防工业出版社,2011.

[14]于洽,朱获,曾永彬，等. 微幅往复走丝微细电解线切割试验研究[J]. 航空学报,2012,33(5): 920-927.

Yu Qia, Zhu Di， Zeng Yongbin, et al. Wire Electrode Micro-electrochemical Machining with Tool Micro-amplitude Reciprocating Motion[J]. Acta Aeronautica et Astronautica Sinica,2012,33(5): 920-927.

[15]滕凯.跟踪喷液式高速走丝电火花线切割研究[J].制造技术与机床,2015(12): 107-110.

Teng Kai. Study on the Cutting Process of the WEDM-HS with the Tracking of the Spray Liquid[J]. Manufacturing Technology & Machine Tool,2015(12): 107-110.

[16]王奔,刘东玺,王明海，等. 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, et al. Wear Mechanism of PCD Tool during Cutting of Isotropic Pyrolytic Graphite[J]. China Mechanical Engineering, 2015,26(20): 2721-2729.

[17]Wang Jin, Han Fuzhu, Cheng Gang, et al. Debris and Bubble Movements during Electrical Discharge Machining [J]. International Journal of Machine Tools and Manufacture, 2012, 58(1):11-18.

[18]潘湛昌,郭钟宁,王成勇. 高速走丝电火花线切割加工中工作液的电解作用[J].电加工,1996,12(2): 17-19.

Pan Zhanchang, Guo Zhongning, Wang Chengyong. Electrolysis of Working Fluid in High Speed Wire Cutting EDM[J]. Electrom Machining, 1996,12(2): 17-19.