i-manager Publications

Effects of Parameters on Sourface Roughness and Material Removal in EDM of High Chromium Steel-D7

Palwinder Singh*, Lakhvir Singh**

*-** Department of Mechanical Engineering, Baba Banda Singh Bahadur Engineering College, Fatehgarh Sahib, Punjab, India.

Periodicity:November - January'2020
DOI : https://doi.org/10.26634/jme.10.1.16576

Abstract

Electrical Discharge Machining (EDM) is one of unconventional processes utilized for machining the electrical conductive materials which cannot be processed by conventional processes. Thus, the study and analysis of EDM variables play an important role to improve the yield and safety of a surface. This research work focuses on the study and analyzes the influence of current, pulse on time T_(on) and pulse off time T_(off) by keeping other parameters constant on Surface Roughness (SR) and Material Removal Rate (MRR). In the present study, machining of high chromium steel-D7 using EDM was experimented with industrial/commercial electrodes of copper material for EDM of high chromium steel-D7. The Central Composite Design (CCD) of Response Surface Methodology (RSM) has been employed for designing the experiments. Scanning Electron Microscopy (SEM) was used. This paper reports the experimentally investigated results during EDM of high chromium steel-D7 with tool material copper electrode. The influence of EDM input variable parameters on SR and MRR were analyzed through different graphs. The Analysis of Variance (ANOVA) were employed to carry out the experiments, identify the significant parameters and optimize the input parameters for both the responses. The optimum parametric combination for smaller SR was found at current 4 A, T_on15 µs, and T_off15 µs and higher MRR was found at current 10 A, T_on 20 µs and T_off 10 µs with copper tool electrode. The surface characteristics on of the machined surface were analyzed by SEM and explained in the paper.

Keywords

Electrical Discharge Machining (EDM), Surface Roughness, Copper Electrode, Central Composite Design (CCD), Analysis of Variance (ANOVA), Scanning Electron Microscopy (SEM).

How to Cite this Article?

Singh, P., and Singh, L. (2020). Effects of Parameters on Sourface Roughness and Material Removal in EDM of High Chromium Steel-D7. i-manager's Journal on Mechanical Engineering, 10(1), 1-12. https://doi.org/10.26634/jme.10.1.16576

References

[1]. Babu, V., Soni, J. S., & Rao, M. L. (2016). Analysis and evaluation of heat affected zones (HAZ) of the workpiece surface machined using different electrode by Die-sinking EDM of EN-31 die steel. The International Journal of Engineering and Science (IJES), 5(3), 37-42.

[2]. Han, F., & Kunieda, M. (2004). Development of parallel spark electrical discharge machining. Precision Engineering, 28(1), 65-72. https://doi.org/10.1016/S0141- 6359(03)00076-X

[3]. Jeykrishnan, J., Ramnath, B. V., Elanchezhian, C., & Akilesh, S. (2017). Parametric analysis on Electro-chemical machining of SKD-12 tool steel. Materials Today: Proceedings, 4(2), 3760-3766. https://doi.org/10.1016/j. matpr.2017.02.272

[4]. Kansal, H. K., Singh, S., & Kumar, P. (2006). An experimental study of the machining parameters in powder mixed electric discharge machining of Al–10% SiCP metal matrix composites. International Journal of Machining and Machinability of Materials, 1(4), 396-411. https://doi.org/10.1504/IJMMM.2006.012349

[5]. Kiran, K., Reddy, G., Prasad, A., & Rajendra, R. (2014). Study of surface integrity characteristics on Al and die steel components using copper tool in sink EDM process. International Journal of Current Engineering and Technology, Special Issue-2, 236-241.

[6]. Kumar, S., & Choudhury, S. K. (2007). Prediction of wear and surface roughness in electro-discharge diamond grinding. Journal of Materials Processing Technology, 191(1-3), 206-209. https://doi.org/10.1016/j.jmatprotec. 2007.03.032

[7]. Lee, H. T., & Tai, T. Y. (2003). Relationship between EDM parameters and surface crack formation. Journal of Materials Processing Technology, 142(3), 676-683. https://doi.org/10.1016/S0924-0136(03)00688-5

[8]. Lee, S. H., & Li, X. P. (2001). Study of the effect of machining parameters on the machining characteristics in electrical discharge machining of tungsten carbide. Journal of Materials Processing Technology, 115(3), 344- 358. https://doi.org/10.1016/S0924-0136(01)00992-X

[9]. Li, J., Liu, X., & Zhao, S. (2014). Prediction model of recast layer thickness in die-sinking EDM process on Ti-6Al- 4V machining through response surface methodology coupled with least squares support vector machine. Computer Modelling & New Technologies, 18(7), 398-405.

[10]. Liu, Y. H., Ji, R. J., Li, X. P., Yu, L. L., Zhang, H. F., & Li, Q. Y. (2008). Effect of machining fluid on the process performance of electric discharge milling of insulating Al2O3ceramic. International Journal of Machine Tools and Manufacture, 48(9),1030-1035. https://doi.org/10.1016/ j.ijmachtools.2007.12.011

[11]. Ming, Q. Y., & He, L. Y. (1995). Powder-suspension dielectric fluid for EDM. Journal of Materials Processing Technology, 52(1), 44-54. https://doi.org/10.1016/0924- 036(94)01442-4

[12]. Mohan, B., Rajadurai, A., & Satyanarayana, K. G. (2002). Effect of SiC and rotation of electrode on electric discharge machining of Al–SiC composite. Journal of Materials Processing Technology, 124(3), 297-304. https://doi.org/10.1016/S0924-0136(02)00202-9

[13]. Mohri, N., Saito, N., Higashi, M., & Kinoshita, N. (1991). A new process of finish machining on free surface by EDM methods. CIRP Annals, 40(1), 207-210. https://doi.org/ 10.1016/S0007-8506(07)61969-6

[14]. Montgomery, D.C. (2012). Design and Analysis of Experiments. John Wiley & Sons.

[15]. Morankar, K. S., & Shelke, R. D. (2017). Optimization of electrical discharge machining process parameters using SCM420 low alloy steel by response surface methodology. IOSR Journal of Mechanical and Civil Engineering, 14(1), 75-79. https://doi.org/10.9790/1684-1401047579

[16]. Narumiya, H., Mohri, N., Saito, N., Otake, H., Tsnekawa, Y., Takawashi, T., Kobayashi, K. (1989). EDM by powder suspended working fluid. In Proceedings of 9th ISEM (pp. 5-8).

[17]. Pandey, P. C., & Shan, H. S. (2004). Modern Machining Processes. Tata McGraw-Hill Education.

[18]. Pham, D. T., Dimov, S. S., Bigot, S., Ivanov, A., & Popov, K. (2004). Micro-EDM—recent developments and research issues. Journal of Materials Processing Technology, 149(1-3), 50-57. https ://doi.org/10.1016/ j. j m atprotec.2004.02.008

[19]. Pradhan, M. K. (2010). Experimental Investigation and Modelling of Surface Integrity, Accuracy and Productivity Aspects in EDM of AISI D2 Steel (Doctoral Dissertation), National Institute of Technology, Rourkela, India.

[20]. Puertas, I., Luis, C. J., & Alvarez, L. (2004). Analysis of the influence of EDM parameters on surface quality, MRR and EW of WC–Co. Journal of Materials Processing Technology, 153, 1026-1032. https://doi.org/10.1016/j.jm atprotec.2004.04.346

[21]. Rajendran, S., Marimuthu, K., & Sakthivel, M. (2013). Study of crack formation and resolidified layer in EDM process on T90Mn W50Cr45 tool steel. Materials and 2 Manufacturing Processes, 28(6), 664-669. https://doi.org/ 10.1080/10426914.2012.727120

[22]. Rajesha, S., Jawalkar, C. S., Mishra, R. R., Sharma, A. K., & Kumar, P. (2014). Study of recast layers and surface roughness on Al-7075 metal matrix composite during EDM machining. International Journal of Recent Advances in Mechanical Engineering, 3(1), 53-62.

[23]. Rebelo, J. C., Dias, A. M., Mesquita, R., Vassalo, P., & Santos, M. (2000). An experimental study on electrodischarge machining and polishing of high strength copper–beryllium alloys. Journal of Materials Processing Technology, 103(3), 389-397. https://doi.org/ 10.1016/ S0924-0136(99)00492-6

[24]. Rizvi, S. A. H., & Agarwal, S. (2016). An investigation on surface integrity in EDM process with a copper tungsten electrode. In 18th Conference on Electro Physical and Chemical Machining, 42, 612-617. https://doi.org/10.1016/j.procir.2016.02.254

[25]. Saha, S. K., & Choudhury, S. K. (2009). Experimental investigation and empirical modeling of the dry electric discharge machining process. International Journal Machine Tools & Manufacture, 49(3-4), 297-308. https://doi.org/10.1016/j.ijmachtools.2008.10.012

[26]. Shabgard, M., Seyedzavvar, M., & Oliaei, S. N. B. (2011). Influence of input parameters on the characteristics of the EDM process. Journal of Mechanical Engineering, 57(9), 689-696.

[27]. Shather, S. K., & Noori, D. A. K. (2014). Influence of intervening variables on surface roughness and material removal rate during WEDM process. Engineering and Technology Journal, 32 (5-Part (A) Engineering), 1141-1148.

[28]. Shather, S. K., Aghdeab, S. H., & Khudhier, W. S. (2019, May). Enhancement the thermal effects produce by EDM using hybrid machining. In IOP Conference Series: Materials Science and Engineering (Vol. 518, No. 3, pp. 032016). IOP Publishing. https://doi.org/10.1088/1757- 899X/518/3/032016

[29]. Tsai, K. M., & Wang, P. J. (2001). Semi-empirical model of surface finish on electrical discharge machining. International Journal of Machine Tools and Manufacture, 41(10), 1455-1477. https://doi.org/10.1016/0924- 0136(94)01442-4

[30]. Wang, P. J., & Tsai, K. M. (2001). Semi-empirical model on work removal and tool wear in electrical discharge machining. Journal of Materials Processing Technology, 114(1),1-17. https://doi.org/10.1016/S0924-0136(01) 00733-6

[31]. Zeng, Y. F., & Chen, F. C. (2003). A simple approach for robust design of high-speed electrical-discharge machining technology. International Journal of Machine Tools and Manufacture, 43(3), 217-227. https://doi.org/ 10.1016/S0890-6955(02)00261-4

Effects of Parameters on Sourface Roughness and Material Removal in EDM of High Chromium Steel-D7

Abstract

Keywords

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