A novel method to switch machining mode between Micro-ECM and Micro-EDM using oxide film on surface of tungsten electrode

被引：22

作者：

Han, Wei ^{[1
]}

Kunieda, Masanori ^{[1
]}

机构：

[1] Univ Tokyo, Dept Precis Engn, Tokyo 1138656, Japan

来源：

PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY | 2019年 / 56卷

关键词：

RODS;

D O I：

10.1016/j.precisioneng.2019.02.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel method to switch the machining mode between micro-EDM and micro-ECM in the same electrolyte using the same tool electrode and pulse generator circuit was proposed in this research. This method uses the electrostatic induction feeding method where a pulse voltage is coupled to the working gap through a capacitance. The switch between the EDM and ECM modes was realized by utilizing the oxide film formed on the surface of the tungsten electrode. To switch the ECM mode to the EDM mode, the polarity of the diode attached in parallel to the working gap was changed to control the generation of the oxide film. In the ECM mode, the diode was connected so that it is forwardly biased when the polarity of the tool electrode is positive, thereby the oxide film was not formed on the tungsten electrode. In the EDM mode, since the polarity of the diode was reversed, the oxide film was formed, thereby discharge could be ignited. The switching ability was verified from the waveforms of gap current and voltage which showed that discharge occurred in the EDM mode, whereas there was no discharge waveform observed in the ECM mode. In the ECM mode, the influences of total amplitude and rise/fall time of pulse voltage were investigated. In the EDM mode, the discharge probability with different concentrations of electrolyte was researched first. Then, the influence of the feeding capacitance C-1 on the EDM mode was investigated. Finally, through-holes were machined by conducting the EDM and ECM modes in this order to obtain higher material removal rate in rough machining and better surface roughness without residual stress in finish machining.

引用

页码：455 / 465

页数：11

共 20 条

[11] Micro electrochemical machining using electrostatic induction feeding method [J].

Koyano, Tomohiro ;

Kunieda, Masanori .

CIRP ANNALS-MANUFACTURING TECHNOLOGY, 2013, 62 (01) :175-178

[12] Study on nano EDM using capacity coupled pulse generator [J].

Kunieda, M. ;

Hayasaka, A. ;

Yang, X. D. ;

Sano, S. ;

Araie, I. .

CIRP ANNALS-MANUFACTURING TECHNOLOGY, 2007, 56 (01) :213-216

[13]

Maeda S., 1967, TECH REP MITSUBISHI, V41, P1267

[14] Three-dimensional micromachining by machine tools [J].

Masuzawa, T ;

Tonshoff, HK .

CIRP ANNALS 1997 - MANUFACTURING TECHNOLOGY, VOLUME 46/2/1997: ANNALS OF THE INTERNATIONAL INSTITUTION FOR PRODUCTION ENGINEERING RESEARCH, 1997, :621-628

[15]

Masuzawa T., 1985, ANN CIRP, V34, P431

[16]

Masuzawa T., 2001, J JPN SOC ELECT MACH, V35, P5

[17] Simultaneous micro-EDM and micro-ECM in low-resistivity deionized water [J].

Minh Dang Nguyen ;

Rahman, Mustafizur ;

Wong, Yoke San .

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 2012, 54-55 :55-65

[18]

Rasmussen JP, 1997, TRANSDUCERS 97 - 1997 INTERNATIONAL CONFERENCE ON SOLID-STATE SENSORS AND ACTUATORS, DIGEST OF TECHNICAL PAPERS, VOLS 1 AND 2, P463, DOI 10.1109/SENSOR.1997.613686

[19] Electrochemical micromachining [J].

Schuster, R ;

Kirchner, V ;

Allongue, P ;

Ertl, G .

SCIENCE, 2000, 289 (5476) :98-101

[20] A study of micro-EDM and micro-ECM combined milling for 3D metallic micro-structures [J].

Zeng, Zhaoqi ;

Wang, Yukui ;

Wang, Zhenlong ;

Shan, Debin ;

He, Xiaolong .

PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, 2012, 36 (03) :500-509

← 1 2 →