Predictor Equations for Estimating Crater Dimensions in PMEDM Process Using Fem Simulation and Experimental Validation

Abstract:

In the present study, the powder mixed EDM (PMEDM) process was simulated using FE approach to obtain simulated temperature profiles for estimating the crater dimensions and volume removed during formation of each crater. The craters formed in PMEDM process had higher diameter and shallow depth resulting in improved MRR and better surface finish. The addition of powder increased the amount of heat available at the workpiece between 20-25% as compared to conventional EDM process. The results were subsequently validated experimentally to compare the actual measurements with the simulation output. Predictor equations for crater radius and depth incorporating the significant factors were developed and also validated with the experimental results.

• Periodical: Materials Science Forum (Volume 751)
• Pages: 45-60
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.751.45
• Online since: March 2013
• Authors: Anirban Bhattacharya, Ajay Batish
• Keywords: Crater Geometry, Electric Discharge Machining (EDM), Experimental Validation, Finite Element (FE) Simulation, Powder Mixed, Predictive Equations

References

[1] Kansal, H.K., Singh, S., and Kumar, P. Effect of silicon powder mixed EDM on machining rate of AISI D2 die steel. J. Mfg Process, 2007, 9, 13–21.

DOI: 10.1016/s1526-6125(07)70104-4

[2] Jeswani, M.L. Effect of the addition of graphite powder to kerosene used as a dielectric fluid in electrical discharge machining. Wear, 1981, 70, 133–139.

DOI: 10.1016/0043-1648(81)90148-4

[3] Wu, K.L.; Yan, B.H.; Huang, F.Y.; Chen, S.C. Improvement of surface finish on SKD steel using electro-discharge machining with aluminium and surfactant added dielectric. Int. J. Mach Tools Mfg, 2005, 45, 1195–1201.

DOI: 10.1016/j.ijmachtools.2004.12.005

[4] Pecas, P., and Henriques, E. Electrical discharge machining using simple and powder-mixed dielectric: The effect of the electrode area in the surface roughness and topography. J. Mater. Process Technol., 2008, 200, 250–258.

DOI: 10.1016/j.jmatprotec.2007.09.051

[5] Kumar, S., Singh, R., Singh, T.P., and Sethi, B.L. Comparison of material transfer in electrical discharge machining of AISI H13 die steel. Proc. IMechE, Part C: J Mech Engng Sci, 2009, 223(7), 1733-1740.

DOI: 10.1243/09544062jmes1227

[6] Lin, Y.C., Chen, Y.F.,  Lin, C.T., and Tzeng, H.J. Electrical Discharge Machining (EDM) Characteristics Associated with Electrical Discharge Energy on Machining of Cemented Tungsten Carbide. Mater. Mfg Process, 2008, 23(4), 391–399.

DOI: 10.1080/10426910801938577

[7] Guu, Y.H.,  Chou, C.Y., and Chiou, S.T. Study of the Effect of Machining Parameters on the Machining Characteristics in Electrical Discharge Machining of Fe-Mn-Al Alloy. Mater. Mfg Process, 2005, 20(6), 905–916.

DOI: 10.1081/amp-200060412

[8] Zhao, W.S., Meng, Q.G. and Wang Z.L. The application of research on powder mixed EDM in rough machining. J. Mater. Process Technol., 2002, 129, 30-33.

[9] Bhattacharya, A. Batish, A., and Singh, G. Optimal parameter settings for rough and finish machining of die steels in powder mixed EDM. Int. J. Adv. Mfg Technol., submitted article (IJAMT7370R2).

DOI: 10.1007/s00170-011-3716-5

[10] Batish, A., Bhattacharya, A., Singla, V.K. and Singh, G. Study of Material Transfer Mechanism in Die Steels using Powder Mixed EDM. Mater. Mfg Process, 2011, available online, DOI: 10. 1080/10426914. 2011. 585498.

[11] Kansal, H.K., Singh, S., and Kumar, P. Parametric optimization of powder mixed electrical discharge machining by response surface methodology. J. Mater. Process Technol., 2005, 169, 427–436.

DOI: 10.1016/j.jmatprotec.2005.03.028

[12] Lin, Y.C., Cheng, C.H., Su, B.L., and Hwang, L.R. Machining Characteristics and Optimization of Machining Parameters of SKH 57 High-Speed Steel Using Electrical-Discharge Machining Based on Taguchi Method. Mater. & Manuf Process, 2006, 21(8), 922–929.

DOI: 10.1080/03602550600728133

[13] Bhattacharya, A., Batish, A., and Singh, G. Optimization of Powder Mixed Electric Discharge Machining using Dummy Treated Experimental Design with Analytic Hierarchy Process. Proc. IMechE, Part B: J. Engng Manuf, 2011, accepted manuscript.

DOI: 10.1177/0954405411402876

[14] Kumar, A., Maheshwari, S., Sharma, C., and Beri, N. A Study of Multiobjective Parametric optimization of Silicon Abrasive Mixed Electrical Discharge Machining of Tool Steel. Mater. Mfg Process, 2010, 25(10), 1041–1047.

DOI: 10.1080/10426910903447303

[15] Joshi, S.N. and Pande, S.S. Thermo-physical modeling of die-sinking EDM process. J. Mfg Process, 2010, 12, 45–56.

DOI: 10.1016/j.jmapro.2010.02.001

[16] Panda, D.K. and Bhoi, R.K. Analysis of spark eroded crater formed under growing plasma channel in electro-discharge machining. Machining Sc. Technol., 2005, 9(2), 239–261.

DOI: 10.1081/mst-200059063

[17] Yadav, V., Jain, V.K. and Dixit, P.M. Thermal stresses due to electrical discharge machining. Int. J. Mach Tools Mfg, 2002, 42, 877–888.

DOI: 10.1016/s0890-6955(02)00029-9

[18] Das, S., Klotz, M. and Klocke, F. EDM simulation: finite element-based calculation of deformation, microstructure and residual stresses. J. Mater. Process Technol., 2003, 142, 434–451.

DOI: 10.1016/s0924-0136(03)00624-1

[19] Sanchez, J.A., Izquierdo, B., Ortega, N., Pombo, I., Plaza, S. and Cabanes, I. Computer simulation of performance of electrical discharge machining operations. Int. J. Compu. Intgrd. Mfg, 2009, 22( 8), 799–811.

DOI: 10.1080/09511920902741125

[20] Salah, N.B., Ghanem, F. and Atig, K.B. Numerical study of thermal aspects of electric discharge machining process. Int. J. Mach Tools Mfg, 2006, 46, 908–911.

DOI: 10.1016/j.ijmachtools.2005.04.022

[21] Marafona, J. and Chousal, J.A.G. A finite element model of EDM based on the Joule effect, Int. J. Mach Tools Mfg, 2006, 46, 595–602.

DOI: 10.1016/j.ijmachtools.2005.07.017

[22] Schulze, H.P., Herms, R., Juhr, H., Schaetzing and Wollenberg, W.G. Comparison of measured and simulated crater morphology for EDM. J. Mater. Process Technol., 2004, 149, 316–322.

DOI: 10.1016/j.jmatprotec.2004.02.016

[23] Kansal, H.K., Singh, S. and Kumar, P. Numerical simulation of powder mixed electric discharge machining (PMEDM) using finite element method. Math. Compu. Modelling, 2008, 47, 1217–1237.

DOI: 10.1016/j.mcm.2007.05.016

[24] DiBitonto, D.D., Eubank, P.T., Patel, M.R. and Barrufet, M.A. Theoretical models of the electrical discharge machining process–I: A simple cathode erosion model. J. Appld. Phys., 1989, 66(9), 4095–4103.

DOI: 10.1063/1.343994

[25] Patel, M.R., Barrufet, A., Eubank, P.T. and DiBitonto, D.D. Theoretical models of the electrical discharge machining process–II: The anode erosion model, J. Appld. Phys., 1989, 66(9), 4104–4111.

DOI: 10.1063/1.343995

[26] Snoyes, R., and Van Dijck, F. Investigations of EDM operations by means of thermo mathematical models. Annl CIRP, 1971, 20(1), 35-36.

[27] Snoyes, R., and Van Dijck, F. Plasma channel diameter growth affects stock removal. Annl CIRP, 1972, 21(1), 39–40.

[28] Ghosh, A. and Mallik, A.K. Manufacturing Science, (Affiliated East-West Press Private Limited, New Delhi, 1985).

[29] Erden, A. Effect of materials on the mechanism of electric discharge machining (EDM). Trans. ASME – J. Engng Mater Technol., 1983, 108, 247–251.

[30] Shankar, P., Jain, V.K. and Sundarajan, T. Analysis of spark profiles during EDM process. Machng Sc. Technol., 1997, 1(2), 195–217.

[31] Marty, C.C. Investigations of surface temperature in electro discharge machining. Trans. ASME-J. Engng for Industry, 1977, 682–684.

[32] Erden, A. and Kaftanoglu, B. Heat transfer modeling of electric discharge machining. Proc. of 21st MTDR Conference, Swansea, 1980, 351–358.

[33] Jilani, S.T. and Pandey, P.C. Analysis and modeling of EDM parameters. Precsn. Engng, 1982, 4(4), 215–221.

[34] Eubank, P.E., Patel, M.R., Barrufet, M.A. and Bozkurt, B. Theoretical models of the electrical discharge machining process – III: The variable mass, cylindrical plasma model. J Appd Phys., 1993, 73(11), 7900–7909.

DOI: 10.1063/1.353942

[35] Bhattacharya, R., Jain, V.K. and Ghoshdastidar, P.S. Numerical simulation of thermal erosion in EDM process. IE (I) Journal-PR, 1996, 77, 13–19.

[36] Madhu, P., Jain, V.K., Sundararajan, T. and Rajurkar, K.P. Finite element analysis of EDM process. Procsng of Adv. Mater., 1991, 1, 161–173.

[37] Singh, Gurpreet. Experimentation for improvement in surface properties and process optimization of die steels by using powder mixed dielectric in EDM process. (ME Thesis, Thapar University, Patiala, 2010).

[38] Singh, Gurmail. Investigations on improvement of material properties and parametric optimization of MRR, TWR and roughness using powder mixed dielectric in EDM process. (ME Thesis, Thapar University, Patiala, 2010).

[39] Pandey, P.C. and Jilani, S.T. Plasma channel growth and the resolidified layer in EDM. Precision. Engng, 1986, 8(2), 104–110.

DOI: 10.1016/0141-6359(86)90093-0