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http://dx.doi.org/10.14400/JDC.2018.16.12.309

Efficient Arc Detection and Control Method in Electro-discharge Machining  

Park, Yang-Jae (Dept.of Computer Engineering, Gachon University)
Publication Information
Journal of Digital Convergence / v.16, no.12, 2018 , pp. 309-315 More about this Journal
Abstract
In this paper, propose an efficient arc detection and control method to achieve fast machining speed, improved precision and surface roughness in discharge machining, especially for carbide and hard material processing and metal processing using discharge phenomenon as energy. A single discharge waveform is divided into three sections of Td (Time-Delay), Ton (Time-on) and Toff (Time-off) and the gate control timing is simulated using the HDL language. In this paper, we analyze the effect of the gap between the electrode and the workpiece on the machining results by determining the operation of the servo mechanism by sampling the Td section through the comparator circuit. As a result of the analysis, the Td section of the formed waveform was more precisely sampled at a high speed and the results were improved when applied to the gap control between the electrode and the workpiece.
Keywords
Discharge; EDM; Arc Detection; Arc Controlling; Gap Controlling; Pulse Sampling;
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1 G. M. Kim, D. K. Choi & J. N. Chu. (1998). Development of Micro-EDM Machine for Microshaft and Microhole Machining. Journal of the Korean Society of Precision Engineering, 15, 12-15.
2 J. Y. Choi, C. S. Ha, S. W. Hwang, H. J. Lee, D. H. Kim & C. H. Park. (2007). The Development of Plasma Jet under Atmospheric Pressure by means of The Sub-Microsecond Pulsed Voltage. The 4th International Workshop on Microplasmas, 114.
3 M. Kunieda, Y. Miyoshi, T. Takaya, N. Nakajima, Y. Zhanbo & M. Yoshida. (2003). High Speed 3D Milling by Dry EDM, Annals of the CIRP, 52(1), 147-150.   DOI
4 F. Han, S. Wachi & M. Kunieda. (2004). Improvement of machining characteristics of micro-EDM using transistor type isopulse generator and servo feed control. Precision Engineering, 28, 378-385.   DOI
5 Z. Y. Yu, T. Masuzawa & M. Fujino. (1998). 3D micro-EDM with simple shape electrode, Part 1: machining of cavities with sharp corners and electrode wear compensation, International Journal of Electrical Machining, 102-106.
6 A. Ozgedik & C. Cogun, (2006). An experimental investigation of tool wear in electric discharge machining, International Jouranl of Advanced Manufacturing Technology, 27, 488-500.   DOI
7 K. H. Ho & S. T. Newman. (2003). State of the art electrical discharge machining (EDM), International Journal of Machine Tools & Manufacture, 43, 1287-1300.   DOI
8 S. H. Kim, H. S. Lim, G. S. Lim & B. C. Kim. (2009). Investigation of Machining Characteristics for EDM Milling. Fusion of IT and MT(Manufacturing technology), 111-112.
9 H. S. Lim, A. S. Kumar & M. Rahman. (2002). Improvement of form accuracy in hybrid machining of microstructures. Journal of Electronic Materials, 31(10), 1032-1038.   DOI
10 S. Matsui, T. Kaito, J. Fujita, M. Ishida & Y. Ochiai. (2001). Three dimensional nanostructure fabrication by focused ion beam chemical vapor deposition, Journal of JSPE, 67, 1412-1415.
11 Y. T. Kim, S. J. Park & S. J. Lee. (2003). Machining of Micro-scale Shapes using Micro-EDM Process. Fusion of IT and MT(Manufacturing technology), 109-117
12 H. M. Ahn, Y. T. Kim, S. J. Park & S. J. Lee. (2002).Machining Characteristics of Tool Electrode using Micro-EDM. Proceedings of the KSPE, 1003-1007.
13 H. M. Ahn, Y. T. Kim, S. J. Park & S. J. Lee. (2002). Experimental Study on the Electrode Surface in WEDG, Proceedings of the KSPE, 218-222.
14 Y. H. Jeong & B. K. Min. (2007). Geometry prediction of EDM-drilled holes and tool electrode shapes of micro-EDM process using simulation. International Journal of Machine Tools & Manufacture, 47(12-13), 1817-1826.   DOI
15 J. W. Jung, Y. H. Jeong, B. K. Min & S. J. Lee. (2008). Model-based Pulse Frequency Control for Micro-EDM Milling Using Realtime Discharge Pulse Monitoring. Journal of Manufacturing Science and Engineering, 130(3), 1-11.