Thermal Modeling and Structural Analysis in Wire EDM Process for a 3D Model

Abstract:

Wire EDM is one of the most non conventional machining processes used for cutting of different types of complex materials. Copper material in wire EDM has a wide application in several industries but its thermal and structural analysis in wire EDM has challenged the authors to model the work-piece and tools accurately using the software. The present work deals with the design of a 3 dimensional model of a work-piece material made of copper. The objective of the present work is to analyse the temperature, total heat flux and equivalent stress of the work-piece material using finite element analysis in ANSYS software. In the current work, a 3D model was designed with the Steady state thermal analysis and it was designed with the available experimental data using ANSYS workbench. The temperature and the total heat flux were calculated using this analysis. Another analysis is performed using Static structural to calculate the equivalent stress generated in the work-piece material using ANSYS. The model was developed for single spark only. Automated type of meshing and axi-symmetric type of geometry are considered for this experiment. The wire part is neglected and all the analysis is made on the work-piece only. XRD analysis is also performed on the work-piece material to know the crystallinity of the compound. Mesh Convergence test was also performed to determine the optimum solution for the requisite mesh. Finally the model was designed and various graphs were plotted for the temperature, total heat flux and equivalent stress of the material.

• Periodical: Applied Mechanics and Materials (Volume 852)
• Pages: 279-289
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.852.279
• Online since: September 2016
• Authors: Kasinath Das Mohapatra*, Susanta Kumar Sahoo, Munmun Bhaumik
• Keywords: ANSYS, Equivalent Stress, Meshing, Total Heat Flux, Wire EDM, XRD

References

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

DOI: 10.1063/1.343995

[2] P. Madhu, V.K. Jain, T. Sundararajan, Analysis of EDM process: A Finite Element Approach, Comput. Eng. ASME. 2 (1991) 121-127.

[3] J.C. Rebelo, A. Dias, Morao, M.R. Morao, P. Vassalo, M. Santos, An experimental study on electro-discharge machining and polishing of high strength copper-beryllium alloys, J. Mater. Process. Technol. 108 (2000) 389-397.

DOI: 10.1016/s0924-0136(99)00492-6

[4] C. Haron, C.H. Md. Deros, A. Ginting, M. Fauziah, Investigation on the influence of machining parameters when machining tool steel using EDM, J. Mater. Process. Technol. 116 (2001) 84-87.

DOI: 10.1016/s0924-0136(01)00846-9

[5] S. Saha, M. Pachon, A. Ghosal, M.J. Schulz, Finite element modeling and optimization to prevent wire breakage in electro-discharge machining Mechanics, Res. Commun. 31 (2004) 451–463.

DOI: 10.1016/j.mechrescom.2003.09.006

[6] I. Cabanesa, E. Portilloa, M. Marcosa, J.A. Sanchezb, An industrial application for on-line detection of instability and wire breakage in wire EDM, J. Mater. Process. Technol. 195 (2008) 101–109.

DOI: 10.1016/j.jmatprotec.2007.04.125

[7] Y.S. Liao, Y.P. Yub, The energy aspect of material property in WEDM and its application, J. Mater. Process. Technol. 149 (2004) 77–82.

[8] J. Marafona, J.A.G. Chousal, A finite element model of EDM based on the Joule effect, Int. J. Mach. Tool. Manu. 46 (2006) 595-602.

DOI: 10.1016/j.ijmachtools.2005.07.017

[9] Y.B. Guo, W. Li, I.S. Jawahir, Surface integrity characterization and prediction in machining of hardened and difficult-to machine alloys: a state of the art research review and analysis, Mach. Sci. Technol. 13(4) (2009) 437–470.

DOI: 10.1080/10910340903454922

[10] S.A. Lajevardi, T. Shahrabi, J.A. Szpunar, Synthesis of functionally graded nano Al2O3-Ni composite coating by pulse electro deposition, Appl. Surf. Sci. 279 (2013)180–188.

DOI: 10.1016/j.apsusc.2013.04.067

[11] V. Navas, I. Ferreres, J.A. Maranon, C. Garcia-Rosales, J. Sevillano, Electro-discharge machining (EDM) versus hard turning and grinding - comparison of residual stresses and surface integrity generated in AISI O1 tool steel, J. Mater. Process. Technol. 195(1–3) (2008).

DOI: 10.1016/j.jmatprotec.2007.04.131

[12] V. Josko, J. Mihael, On-line selection of rough machining parameters, J. Mater. Process. Technol. 149 (2004) 256-262.

[13] S. Habib, A. Okada, Study on the movement of wire electrode during fine wire electrode discharge machining process, J. Mater. Process. Technol. 227 (2016) 147-152.

DOI: 10.1016/j.jmatprotec.2015.08.015

[14] L. Li, Y. Li, X.T. Wei, X. Cheng, Machining characteristics of Inconel 718 by sinking EDM and Wire EDM, Mater. Manuf. Process. 30 (2015) 968-973.

DOI: 10.1080/10426914.2014.973579

[15] A. Mandal, A.R. Dixit, A.K. Das, N. Mandal, Modeling and optimization of machining Nimonic C-263 super alloy using multi-cut strategy in WEDM, Mater. Manuf. Process. (2015).

DOI: 10.1080/10426914.2015.1048462

[16] P. Sivaprakasam, P. Hariharan, S. Gowri, Modeling and analysis of micro-WEDM process of titanium alloy using response approach, Int. J. Eng. Sci. Technol. 17 (2014) 227-235.

DOI: 10.1016/j.jestch.2014.06.004

[17] A. Goswami, J. Kumar, Investigation of surface integrity, material removal rate and wire wear ratio for WEDM of Nimonic 80A alloy using GRA and Taguchi method, Int. J. Eng. Sci. Technol. 17 (2014) 173-184.

DOI: 10.1016/j.jestch.2014.05.002

[18] A. Goswami, J. Kumar, Optimization in wire-cut EDM of Nimonic 80A using Taguchi approach and utility concept, Int. J. Eng. Sci. Technol. 17 (2014) 236-246.

DOI: 10.1016/j.jestch.2014.07.001

[19] G. Zhang, Z. Chen, Z. Zhang, Y. Huang, W. Ming, H. Li, A macroscopic mechanical model of wire electrode deflection considering temperature increment in WEDM process, Int. J. Mach. Tool. Manu. 78 (2014) 41-53.

DOI: 10.1016/j.ijmachtools.2014.01.004

[20] S.N. Joshi, S.S. Pandey, Intelligent process modeling and optimization of die-sinking electric discharge machining, Appl. Soft. Co. 11 (2011) 2743-2755.

DOI: 10.1016/j.asoc.2010.11.005

[21] S.N. Joshi, S.S. Pandey, Thermo-physical modeling of die-sinking EDM process, J. Manuf. Process. 12 (2010) 45-56.

DOI: 10.1016/j.jmapro.2010.02.001

[22] R. Rajendran, S.P. Vendan Mihael, Study of work-piece thermal profile in electric discharge machining, Int. J. Eng. Res. Technol. 3(1) (2014) 3498-3503.