Optimization of Overcut in EDM of Mirrax Steel Using Copper Alloyed Electrodes

Öz

In this study, the optimization of overcut in electrical discharge machining (EDM) processes, with a focus on the effects of various process parameters on machining performance, particularly when challenging materials such as Mirrax steel are investigated. A Taguchi-based experimental design was employed to systematically analyze three distinct copper-based alloy electrodes; CuCoNiBe, CuNi2SiCr, and CuCr1Zr under varying discharge currents (6 A, 12 A, 25 A), pulse on-times (50 μs, 100 μs, 200 μs), and pulse off-times (200 μs, 400 μs, 800 μs). It was found that overcut is significantly influenced by the electrode type, discharge current, and pulse duration, with the CuCoNiBe electrode exhibiting the highest overcut values. Analysis of Variance (ANOVA) was conducted to confirm the significant contributions of these parameters to overcut variability. This research contributes to a deeper understanding of the interplay between EDM parameters, in advanced manufacturing applications.

Anahtar Kelimeler

• EDM
• Copper
• Overcut
• Taguchi
• Optimization

Bakır Alaşımlı Elektrotlar Kullanılarak Mirrax Çeliğinin EEİ'sinde Yanal Açıklık Optimizasyonu

Öz

Bu çalışma, Mirrax çeliği gibi işlenmesi zor malzemelerin, işleme parametrelerinin işlebilirlik performansı üzerindeki etkilerine odaklanılarak, Elektrik Erozyon ile İşleme (EEİ) süreçlerinde yanal açıklık optimizasyonu araştırılmıştır. Üç farklı bakır alaşımı elektrotun (CuCoNiBe, CuNi2SiCr ve CuCr1Zr) değişen boşalım akımları (6 A, 12 A, 25 A), vurum süreleri süreleri (50 μs, 100 μs, 200 μs) ve bekleme süreleri (200 μs, 400 μs, 800 μs) altında sistematik olarak analiz etmek için Taguchi tabanlı bir deneysel tasarım kullanılmıştır. Yanal açıklığın elektrot tipi, boşalım akımı ve vurum süresinden önemli ölçüde etkilendiği ve CuCoNiBe elektrotun en yüksek yanal açıklık değerlerini gösterdiği bulunmuştur. Bu parametrelerin yanal açıklık üzerindeki etkilerini belirlemek için Varyans Analizi (ANOVA) kullanılmıştır. Bu çalışma, gelişmiş imalat uygulamalarında EDM parametreleri arasındaki etkileşimin daha iyi anlaşılmasına katkı sağlamaktadır.

Anahtar Kelimeler

• EEİ
• Yanal açıklık
• Taguchi
• Optimizasyon
• Bakır

Kaynakça

1. S.K. Garg, A. Manna, A. Jain, An experimental investigation for optimization of WEDM parameters during machining of fabricated Al/ZrO2(p)-MMC, Arabian Journal for Science and Engineering, 38: 3471–3483, 2013.
2. M.K. Dikshit, J. Anand, D. Narayan, S. Jindal, Machining characteristics and optimization of process parameters in die-sinking EDM of Inconel 625, Journal of the Brazilian Society of Mechanical Sciences, 41, 7: 2019.
3. K.H. Ho, S. T. Newman, State of the art electrical discharge machining (EDM), International Journal of Machine Tools and Manufacture, 43(13): 1287–1300, 2003.
4. A. Kalyon, Alüminyum 6082 alaşiminin pirinç elektrot ile işlenebilirliğinin optimizasyonu, El-Cezeri Fen ve Mühendislik Dergisi, 6(1): 118–130, 2019.
5. F. Ceri̇tbi̇nmez, E.S. Gökkaya, E. Kanca, MRR, EWR and KERF Analysis in cold work tool steel machining in EDM method by copper and brass electrode, Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 6(1): 35–51, 2023.
6. A. Moghanizadeh, Reducing side overcut in EDM process by changing electrical field between tool and work piece, International Journal of Advanced Manufacturing Technology, 90(1–4): 1035–1042, 2017.
7. H.N. Chiang, J.J.J. Wang, An analysis of overcut variation and coupling effects of dimensional variable in EDM process, International Journal of Advanced Manufacturing Technology, 55(9–12): 935–943, 2011.
8. O. Belgassim, A. Abusaada, Investigation of the influence of EDM parameters on the overcut for AISI D3 tool steel, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 226(2): 365–370, 2012.

9. P.N. Huu, T.N. Duc, S. Shirguppikar, Simultaneous improvement of Z-coordinate and overcut in EDM of titanium grade 5 alloy using a carbon-coated micro-tool electrode, Modern Physics Letters B, 37(6): 2023.
10. N. Ahmed, K. Ishfaq, M. Rafaqat, S. Pervaiz, S. Anwar, and B. Salah, EDM of Ti-6Al-4V: Electrode and polarity selection for minimum tool wear rate and overcut, Materials and Manufacturing Processes, 34(7): 769–778, 2019.
11. S.K. Tamang, N. Natarajan, and M. Chandrasekaran, Optimization of EDM process in machining micro holes for improvement of hole quality, Journal of the Brazilian Society of Mechanical Sciences, 39(4): 1277–1287, 2017.
12. K. Ishfaq, M. Asad, M. Harris, A. Alfaify, S. Anwar, L. Lamberti, M.L. Scutaru, EDM of Ti-6Al-4V under nano-graphene mixed dielectric: A detailed investigation on axial and radial dimensional overcuts, Nanomaterials,12(3): 432, 2022.
13. K. Surani, S. Patel, H. Panchal, N. Gupta, T. Shinde, Y. Sharma, Mathematical modeling for radial overcut on powder mixed micro-electrical discharge machining (μ-EDM) of TZM-molybdenum superalloy by response surface methodology, International Journal on Interactive Design and Manufacturing, 18(8): 5977–5989, 2024.
14. S. Dutta, D. K. Sarma, Multi-response optimisation of machining parameters to minimise the overcut and circularity error during micro-EDM of nickel-titanium shape memory alloy, Advances in Materials and Processing Technologies, 10, 1: 1–21, 2024.
15. A. K. Rouniyar, P. Shandilya, Semi-empirical modeling and optimization of process parameters on overcut during MFAPM-EDM of Al6061 alloy, Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 235(6): 1784–1796, 2021.
16. A. Das, S. Padhan, S. Ranjan Das, Analysis on hole overcut during micro-EDM of Inconel 718, Materials Today, 56: 29–35, 2022.
17. S. Rajamanickam, J. Prasanna, Multi objective optimization during small hole electrical discharge machining (EDM) of Ti-6Al-4V using TOPSIS, Material Today, l(18): 3109–3115, 2019.
18. R. Teimouri, H. Baseri, Study of tool wear and overcut in EDM process with rotary tool and magnetic field, Advances in Tribology, 2012: 1–8, 2012.
19. M. Bhaumik, K. Maity, Effects of process parameters and cryotreated electrode on the radial overcut of AISI 304 in SiC powder mixed EDM, Surface Review and Letters, 24(2): 1850029, 2017.
20. F.L. Zhao, H. Wang, Z.Z. Lu, Calculating the overcut in electro-discharge machining, Key Engineering Materials, 291–292: 561–566, 2005.
21. A. Kalyon, Optimization of machining parameters in sinking electrical discharge machine of caldie plastic mold tool steel, Sadhana, 45: 1, 2020.
22. M.Y. Lin, C.C. Tsao, H.H. Huang, C.Y. Wu, C.Y. Hsu, Use of the grey-Taguchi method to optimise the micro-electrical discharge machining (micro-EDM) of Ti-6Al-4V alloy, International Journal of Computer Integrated Manufacturing, 28(6): 569–576, 2015.
23. E. Aliakbari, H. Baseri, Optimization of machining parameters in rotary EDM process by using the Taguchi method, International Journal of Advanced Manufacturing Technology, 62( 9–12): 1041–1053, 2012.
24. R. Kumar, V. Yadav, L. Rawal, U. Kulshrestha, Analysis of over cut in electrical discharge machining of nickel-based alloy using Taguchi approach, Materials and Manufacturing Processes, 38: 126–134, 2023.
25. A.H. Chiou, C.-C. Tsao, C.-Y. Hsu, A study of the machining characteristics of micro EDM milling and its improvement by electrode coating, International Journal of Advanced Manufacturing Technology, 78(9–12): 1857–1864, 2015.
26. B. Jabbaripour, M.H. Sadeghi, S. Faridvand, M.R. Shabgard, Investigating the effects of edm parameters on surface integrity, MRR and TWR in machining of Ti–6Al–4V, Machining Science and Technology, 16(3): 419–444, 2012.
27. S.S. Kumar, T. Varol, A. Canakci, S.T. Kumaran, M. Uthayakumar, A review on the performance of the materials by surface modification through EDM, International Journal of Lightweight Materials and Manufacture, 4: 127–144, 2021.
28. H. Marashi, D.M. Jafarlou, A.A.D. Sarhan, M. Hamdi, State of the art in powder mixed dielectric for EDM applications, Precision Engineering, 46: 11–33, 2016.
29. T. Muthuramalingam, B. Mohan, A review on influence of electrical process parameters in EDM process, Archives of Civil and Mechanical Engineering, 15: 87–94, 2015.
30. E. Nas, Analysis of the electrical discharge machining (EDM) performance on Ramor 550 armor steel, Materials Testing, 62(5): 481–491, 2020.
31. F. Ceri̇tbi̇nmez, A. Günen, U. Gürol, G. Çam, Dövme ve Eklemeli İmalat Yöntemiyle Üretilmiş Inconel 625 Alaşımların Termal Yöntemle Hızlı Delinmesinde Elektrot Aşınmasının İncelenmesi, International Journal of Advances in Engineering and Pure Sciences, 35: 89–99, 2023.
32. F. Ceri̇tbi̇nmez, E. Kanca, The effects of cutting parameters on the kerf and surface roughness on the electrode in electro erosion process, Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, 9(2): 335–346, 2021.
33. F. Ceri̇tbi̇nmez, A. Yapici, Sleipner Soğuk İş Takım Çeliğinin Elektro-Erozyon Tezgahında Bakır Krom Zirkonyum Alaşımı Elektrot ile İşlenmesinde İşleme Parametrelerinin Kerf ve Yüzey Pürüzlülüğü Üzerine Etkisinin İncelenmesi, Karadeniz Fen Bilimleri Dergisi, 11(2): 570–583, 2021.
34. F. Ceri̇tbi̇nmez, EDM Hızlı Delik Delme Parametrelerinin Kerf ve İşlem Süresine Etkileri, Karadeniz Fen Bilimleri Dergisi, 12(2): 663–675, 2022.
35. A. Uğur, E. Nas, H. Gökkaya, Investigation of the machinability of SiC reinforced MMC materials produced by molten metal stirring and conventional casting technique in die-sinking electrical discharge machine, International Journal of Mechanical Sciences, l(186): 105875- 105875, 2020.
36. S. Dewangan, S. Gangopadhyay, C.K. Biswas, Study of surface integrity and dimensional accuracy in EDM using Fuzzy TOPSIS and sensitivity analysis, Measurement, 63: 364–376, 2015.
37. B. Erman, A. Kalyon, Multi objective optimization of parameters in EDM of Mirrax steel, Materials and Manufacturing Processes, 38(7): 1–11, 2022.