Performance Analysis of Vegetable Oil as Dielectric Fluid in Electric Discharge Machining Process of Inconel 800

Abstract:

Electric discharge machining (EDM) is a spark erosion process widely used to machine difficult-to-cut material by conventional machining method. The major elements of EDM process are work piece, electrode and dielectric fluid. In this work, an attempt is made to investigate vegetable oil as dielectric fluid and their process performance for machining of Inconel 800 in EDM process. The effects of dielectric fluids are investigated with vegetable oils and conventional dielectric fluid namely Sunflower oil and Kerosene respectively. The important input variables considered in this study are pulse on/off time, current and voltage. Three levels of energy setting are employed for machining with selected dielectric fluids. The output parameters are considered tool wear rate (TWR), material removal rate (MRR) and surface roughness (SR). In the present study effect of vegetable oil as dielectric fluid and the results are compared with conventional dielectric fluid. The result revealed that vegetable oils are successfully employed as dielectric fluids and they are having similar dielectric properties and erosion mechanism compared to conventional dielectric fluid. This proposed vegetable oil based dielectric fluids showed higher MRR than conventional dielectric. It shows vegetable oils have similar dielectric properties compared with conventional dielectric and it is possible to replace as dielectric fluid in EDM process.

• Periodical: Materials Science Forum (Volume 978)
• Pages: 77-83
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.978.77
• Online since: February 2020
• Authors: B. Singaravel*, K.Chandra Shekar, G.Gowtham Reddy, S. Deva Prasad
• Keywords: Dielectric Fluid, EDM, Process Performance, Vegetable Oils

References

[1] N. Pragadish, M.P. Kumar, Surface characteristics analysis of dry EDMed AISI D2 steel using modified tool design. J Mech Sci Tech. 29 (2015), 1737-1743.

DOI: 10.1007/s12206-015-0347-z

[2] A. Gholipoor, H. Baseri, M.R. Shabgard, Investigation of near dry EDM compared with wet and dry EDM processes. J Mech Sci Tech. 29(2015) 2213-2218.

DOI: 10.1007/s12206-015-0441-2

[3] L. Tang, Y.T. Du, Multi-objective optimization of green electrical discharge machining Ti–6Al–4V in tap water via Grey-Taguchi method. Mater Manuf Process, 29(2014) 507-513.

DOI: 10.1080/10426914.2013.840913

[4] S.V. Kumar, M.P Kumar, Machining process parameter and surface integrity in conventional EDM and cryogenic EDM of Al–SiCp MMC. Journal of Manufacturing Processes, 20(2015) 70-78.

DOI: 10.1016/j.jmapro.2015.07.007

[5] A. Kumar, A. Mandal, A.R. Dixit, A.K. Das, Performance evaluation of Al2O3 nano powder mixed dielectric for electric discharge machining of Inconel 825. Mater Manuf Process, 33(2018) 986-995.

DOI: 10.1080/10426914.2017.1376081

[6] M. Amanullah, S.M. Islam, S.Chami, G.Ienco, Analyses of physical characteristics of vegetable oils as an alternative source to mineral oil-based dielectric fluid, In Dielectric Liquids, 2005. ICDL 2005. 2005 IEEE International Conference on 2005, 397-400. IEEE.

DOI: 10.1109/icdl.2005.1490109

[7] M. Amanullah, S.M. Islam, S. Chami G.Ienco, Evaluation of several techniques and additives to de-moisturise vegetable oils and bench mark the moisture content level of vegetable oil-based dielectric fluids In Dielectric Liquids, 2008. ICDL 2008. IEEE International Conference on (pp.1-4). IEEE.

DOI: 10.1109/icdl.2008.4622460

[8] Satish Kumar, Ashwani Kumar Dhingra, Sanjeev Kumar, Parametric optimization of powder mixed electrical discharge machining for nickel based superalloy inconel-800 using response surface methodology, Mechanics of Advanced Materials and Modern Processes 3 (2017).

DOI: 10.1186/s40759-017-0022-4

[9] K. Karunakaran, M. Chandrasekaran, Experimental Investigation Nano Particles Influence in NPMEDM to Machine Inconel 800 with Electrolyte Copper Electrode IOP Conf. Series: Materials Science and Engineering 197 (2017) 012068.

DOI: 10.1088/1757-899x/197/1/012068

[10] T.R. Paul, H.Majumder, V. Dey, P. Dutta, Study the Effect of Material Removal Rate in Die-sinking EDM for Inconel 800 using Response Surface Methodology, JMSME 9 (2015) 27-31.

[11] J.B. Valaki, P.P Rathod, C. D. Sankhavara, Investigations on technical feasibility of Jatropha curcas oil based bio dielectric fluid for sustainable electric discharge machining (EDM). J Manuf Process, 22 (2016) 151-160.

DOI: 10.1016/j.jmapro.2016.03.004

[12] P. S. Ng, S. A. Kong, S. H. Yeo, Investigation of biodiesel dielectric in sustainable electrical discharge machining. Int J Adv ManufTechnol. 90 (2017) 2549-2556.

DOI: 10.1007/s00170-016-9572-6

[13] S. Kumar, R. Singh, A. Batish, T.P. Singh, Modeling the tool wear rate in powder mixed electro-discharge machining of titanium alloys using dimensional analysis of cryogenically treated electrodes and workpiece. P I MECH ENG E J ..., 231, (2017) 271-282.

DOI: 10.1177/0954408915593875

[14] V.B. Valaki, P.P. Rathod, Investigating feasibility through performance analysis of green dielectrics for sustainable electric discharge machining. Mater Manuf Process 31(2016)541-549.

DOI: 10.1080/10426914.2015.1070430