Experimental Research on Capacitor Discharge Machining of Insulating Ceramics

Experimental Research on Capacitor Discharge Machining of Insulating Ceramics

Haifeng Zhang Jinghua Zhou  Jianyong Liu 

North China University of Technology, Beijing 100144, China

Beijing Institute of EDM Beijing, Beijing 100191, China

Corresponding Author Email: 
zhanghaifeng588@126.com
Page: 
9-14
|
DOI: 
https://doi.org/10.18280/mmc_a.910102
Received: 
8 December 2017
|
Accepted: 
17 April 2018
|
Published: 
31 March 2018
| Citation

OPEN ACCESS

Abstract: 

Aiming at the features of low efficiency of electrical discharge machining and difficult control of surface roughness of insulating ceramics, this paper proposes a capacitor discharge machining method. This method is to carry out experimental research and mechanism analysis on the effect of capacitor discharge on insulating ceramics removal volume by using high-capacitance capacitor to discharge for short time to auxiliary electrode and insulating ceramics and by the methods of changing capacitance, voltage magnitude, electrode size, type of working media, etc. The experimental results show that the maximum ceramics removal volume produced by capacitor discharge under the action of relevant parameters is 18.53 mm3. Through metallography effect analysis of insulating ceramics surface with microscope, it concludes that the material removal is mainly in stripping mode. The material removal volume increases as the discharge parameter increases, and it is more sensitive to some parameters, such as medium.

Keywords: 

electrical discharge machining, insulating ceramics, capacitor, discharge channel

1. Introduction
2. Experimental Principle and Circuit
3. Experimental Results and Analysi
4. Conclusions
  References

[1] Agarwal S, Rao PV. (2008). Experimental investigation of surface/subsurface damage formation and material removal mechanisms in SiC grinding. Int. J. Mach Tools Manuf 48: 698-710.

[2] Zhang JH, Lee TC, Lau WS. (1997). Study on the electro-discharge machining of hot pressed aluminium oxide-based ceramics. J Mater Proc Tech 63: 908-912.

[3] Lorenzo-Martin C, Ajayio OO, Singh D, Routbort JL. (2009). Friction and wear behavior of zirconia ceramic materials. Ceram Eng. Sci Proc 29(4): 75-84.

[4] Bandyopadhyay WS, Biswas SK, Maiti HS. (2009). Nitride & oxy-nitride ceramics for high temperature and engineering applications. Key Eng. Mat 395: 193-208.

[5] Sanjay K, Chak P, Rao V. (2008). The drilling of Al2O3 using a pulsed DC supply with a rotary abrasive electrode by the electrochemical discharge process. Int. J Adv Manuf Technol 39: 633-641.

[6] Tian XL, Yang JF, Liu C, ZhangBG. (2009). Research progress of advanced machining technologies for engineering ceramics. Adv Mater Res 69-70: 359-363.

[7] Asfana B, Mohammad YA, Rahman MA. (2014). Micro-electro discharge machining of non-conductive zirconia ceramic: investigation of MRR and recast layer hardness. Int. J Adv Manuf Technol. (75): 257-267.

[8] Florian Z, Tim H, Claas M. (2014). Microstructuring of non‑conductive silicon carbide by electrical discharge machining. Microsyst Technol (20): 1875-1880.

[9] Ji RJ, Liu YH, Fang L. (2011). Numerical simulation of single pulse discharge machining insulating ceramics with high instantaneous energy density. Electro Machining and Mould 6: 1-6.

[10] Liu YH, Yu LL, Xu YL. (2009). Thermodynamic characteristics of machining insulating engineering ceramics with electrical discharge channel. Chinese Journal of High Pressure Physics 4(23): 91-97.

[11] Du JH, Liu YH. (2005). The grinding technology of engineering ceramics. Materials for Mechanical Engineering (3): 1-3.

[12] Ji RJ, Liu YH, Zhang YZ, Zhang HF, Li XP, Dong X. (2011). An experimental research eon single discharge machining of insulating ceramics efficiently with high energy capacitor. Science China Technological Sciences 54(6): 1537- 1545.

[13] Yeo SH, Kurnia W, Tan PC. (2008). Critical assessment and numerical comparison of electro-thermal models in EDM. J Mater Process Technol. (203): 241-25.

[14] Guo L, Xie GZ, Li B. (2009). Grinding temperature in high speed deep grinding of engineering ceramics. Int J Abras Technol 2(3): 245-258.

[15] Kumar PD. (2008). Study of thermal stresses induced surface damage under growing plasma channel in electro-discharge machining. J. Mater Process Technol 202(1-3): 86-95.

[16] Li MH. (1989). Theory foundation of electric discharge machining. National Defence Industry Press, Beijing pp. 119-123.

[17] Koenig W, Wertheim R, Zvirin Y, Toren M. (1975). Material removal and energy distribution in electrical discharge machining. Annals of the CIRP 24(1): 95-100.

[18] Xia H, Hashimoto H, Kunieda M, Nishiwaki N. (1996). Measurement of energy distribution in continuous EDM process. Seimitsu Kogaku Kaishi Journal of the Japan Society for Precision Engineering 62(8): 1141-1145.

[19] Xia H, Kunieda M, Nishiwaki H, Lior N. (1994). Measurement of energy distribution into electrode in EDM process. Advancement of Intelligent Production (5): 601-606.