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Keywords

Electrical discharge machining, Magnetic Abrasive Finishing, Complex shapes, Hybrid particles, Improved surface roughness

Document Type

Research Paper

Abstract

This study presents an integrated work that combines unconventional machining and finishing techniques for complex geometric models. A Taguchi design investigated three electrical-discharge parameters—electric current, pulse duration, and gap—each at three levels; a multi-objective optimization matrix was then used to select the optimal conditions. The geometric models were designed using SolidWorks software and machined on a CNC machine to ensure maximum accuracy in the resulting samples. The samples were finished using the magnetic abrasive finishing technique, where the particle mixture was developed as a hybrid blend of two types of abrasive particles, tungsten carbide (WC) and silicon carbide (SiC). Among the electrical discharge machining factors, electric current showed the highest influence, yielding a maximum metal removal rate of 25.1024 mm³/min at Ip = 42 A, Tn = 300 µs, gap = 8 mm, and the minimum roughness of 11.6674 µm at Ip = 24 A, Tn = 150 µs, gap = 5 mm. The magnetic abrasive finishing stage substantially improved the surface quality of the complex models, reducing roughness from 11.9169 µm to about 4.29 µm, equivalent to a 64.02% reduction. Within finishing, feed rate was the most influential variable, followed by spindle speed, while particle size had the least effect. Overall, the combined methodology improves process performance and post-process surface quality for complex geometries while identifying the dominant parameters that govern material removal and roughness outcomes.

References

V. Singh, S. K. Pradhan, Optimization of EDM process parameters: a review, Int. J. Emerg. Technol. Adv. Eng., 3 (2014) 1–11. A. Y. Jiao, H. J. Quan, Z. Z. Li, Y. H. Zou‏, Study on improving the trajectory to elevate the surface quality of plane magnetic abrasive finishing, Int. J. Adv. Manuf. Technol., 80 (2015) 1613–1623. https://doi.org/10.1007/s00170-015-7136-9 A. P. Tiwary, B. B. Pradhan, B. Bhattacharyya‏, Study on the influence of micro-EDM process parameters during machining of Ti–6Al–4V superalloy, Int. J. Adv. Manuf. Technol., 76 (2015): 151–160. https://doi.org/10.1007/s00170-013-5557-x J. Zhang, L. Wang, L. Jing, Static Analysis of Manipulator Based on SolidWorks and ANSYS Workbench, J. Phys.: Conf. Ser., 2477, 2023, 012034. https://doi.org/10.1088/1742-6596/2477/1/012034 Onwubolu, G .C. Introduction to SolidWorks: A Comprehensive Guide with Applications in 3D Printing; 1st ed. USA: CRC Press, Inc.; 2016. 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, Mach. Sci. Technol., 16 (2012) 419–444. https://doi.org/10.1080/10910344.2012.698971 M. A. C. Abdullah, A. Yahya, W. Shukri, Integrated Control of Electrical Discharge Machining (EDM) using PSoC, J. Phys.: Conf. Ser., 1529 , 2020, 042087. https://dx.doi.org/10.1088/1742-6596/1529/4/042087 El-Hofy H. Advanced Machining Processes Nontraditional and Hybrid Machining Processes; 1st ed. McGraw Hill; 2005. Xie H, Zou Y., Investigation on Finishing Characteristics of Magnetic Abrasive Finishing Process Using an Alternating Magnetic Field, Machines, 8 (2020) 75. https://doi.org/10.3390/machines8040075 K. Anjaneyulu, G. Venkatesh,‏ Review on Experimental Investigation of Magnetic Abrasive Finishing process, IOP Conf. Ser.: Mater. Sci. Eng., 1145, 2021, 012066. https://doi.org/10.1088/1757-899X/1145/1/012066 B. Girma, S. S. Joshi, M. Raghuram, R. Balasubramaniam‏, An experimental analysis of magnetic abrasives finishing of plane surfaces‏, Mach. Sci. Technol., 10 (2006) 323-340. https://doi.org/10.1080/10910340600902140 M. Alotaibi, B. Honarvar Shakibaei Asli, M. Khan‏, Non-Invasive Inspections: A Review on Methods and Tools, Sensors, 21 (2021) 8474. https://doi.org/10.3390/s21248474 F. Rodríguez, I. Cotto, S. Dasilva, P. Rey, K. Van der Straeten‏, Speckle characterization of surface roughness obtained by laser texturing, Procedia Manuf., 13 (2017) 519–525. https://doi.org/10.1016/j.promfg.2017.09.077 S. S. Kumar, M. Uthayakumar, S. T. Kumaran, P. Parameswaran, E. Mohandas‏, Electrical discharge machining of Al (6351) alloy: role of electrode shape, Int. J. Mater. Prod. Technol., 53 (2016) 86–97. https://doi.org/10.1504/IJMPT.2016.076378 T. W. Huang, D. Y. Sheu‏, High aspect ratio of micro hole drilling by Micro-EDM with different cross-section shape micro tools for flushing process, Procedia CIRP, 95 (2020) 550–553. https://doi.org/10.1016/j.procir.2020.01.161 Y. Q. Laibi, S. K. Shather‏, Effect of SiC-Cu electrode on material removal rate, tool wear and surface roughness in EDM process, Eng. Technol. J., 38 (2020) 1406-1413. https://doi.org/10.30684/etj.v38i9A.552 A. A. Abdu, I. A. Gul, A. Ruwaida, Review on Additively Manufactured Electrodes for use in Electro-Discharge Process, J. Electr. Syst., 20-10s (2024) 6919-6930. M .S. Uddin, V. Santos, R. Marian, Interplay of Process Variables in Magnetic Abrasive Finishing of AISI 1018 Steel Using SiC and Al₂O₃ Abrasives, J. Manuf. Mater. Process., 3 (2019) 29. https://doi.org/10.3390/jmmp3020029 Ahmad S, Singari RM, and Mishra RS. , Development of Al2O3-SiO2 based magnetic abrasive by sintering method and its performance on Ti-6Al-4V during magnetic abrasive finishing, Transactions of the IMF , 99 (2021) 94-101. https://doi.org/10.1080/00202967.2021.1865644 Y. Zou, R. Satou, O. Yamazaki, H. Xie, Development of a New Finishing Process Combining a Fixed Abrasive Polishing with Magnetic Abrasive Finishing Process, Machines , 9 (2021) 81. https://doi.org/10.3390/machines9040081 R. Kumar, V. R. Komma‏, Development of Experimental Setup and Parametric Study of Magnetic Abrasive Finishing Process of Plane Workpieces, NanoWorld J., 9 (2023) S220 – S224 4. https://doi.org/10.17756/nwj.2023-s1-044 M. Shao, D. Xu, S. Li, X. Zuo, C. Chen, G. Peng, J. Zhang, X. Wang, Q. Yang, A review of surface roughness measurements based on laser speckle method, J. Iron Steel Res. Int., 30 (2023) 1897–1915. https://doi.org/10.1007/s42243-023-00930-8 T. G. Raut, M. Y. Shinde‏, A Review on Optimization of Machining Parameters in EDM, int. J. Innov. Res. Sci. Eng. Technol., 4 (2015) 893-896. http://dx.doi.org/10.15680/IJIRSET.2015.0403013 D. B. Attar, U. S. Pawar, An Overview of Electro Discharge Machining:-A Review, Int. Res. J. Eng. Technol., 4 (2017) 131– 137. Q. Liu, Q. Zhang, G. Zhu, K. Wang, J. Zhang, C. Dong‏, Effect of Electrode Size on the Performances of Micro-EDM, Manuf. Process., 31 (2016) 391-396. https://doi.org/10.1080/10426914.2015.1059448 L. Nagdeve, K. Dhakar, H. Kumar‏, Development of novel finishing tool into Magnetic Abrasive Finishing process of Aluminum 6061, Mater. Manuf. Process., 35 (2020) 1129-1134. https://doi.org/10.1080/10426914.2020.1767295 M. K. Sah, A. Vijaya, H. Singh, Experimental study of the surface finishing of CNC magnetic abrasive finishing based on ANN, Can. Metall. Q., 64 (2025) 1351-1363. https://doi.org/10.1080/00084433.2024.2415726 R. Kumar, V. R. Komma, Recent advancements in magnetic abrasive finishing: a critical review, Eng. Res. Express, 6 (2024) 012504. https://dx.doi.org/10.1088/2631-8695/ad2ef7 M. K. Pradhan, C. K. Biswas‏, Effect of process parameters on surface roughness in EDM of tool steel by response surface methodology, Int. J. Precis. Technol., 2 (2011) 64-80. https://doi.org/10.1504/IJPTECH.2011.03811 S. B. Chikalthankar, V. M. Nandedkar, S.V. Borde‏, Experimental investigations of EDM parameters, Int. J. Eng. Res. Dev., 7 (2013) 31-34. V. T. Tran, M. H. Le, M. T. Vo, Q. T. Le, V. H. Hoang, Optimization design for die-sinking EDM process parameters employing effective intelligent method, Cogent Eng., 10 (2023) 2264060. https://doi.org/10.1080/23311916.2023.2264060 H. Yi, J. Liu, P. Ao, E. Lu, H. Zhang, Visual method for measuring the roughness of a grinding piece based on color indices, Opt. Express., 24 (2016) 17215-17233. https://doi.org/10.1364/OE.24.017215

Highlights

Complex 3D models were designed in SolidWorks and fabricated using CNC machining. EDM was applied to study the effects of current, pulse on-time, and gap on MRR and roughness. Current was found to be the most dominant factor affecting MRR and surface roughness. GRA optimization identified the best condition for balancing the removal rate and surface finish. Magnetic abrasive finishing improved surface roughness by up to 64.02% with hybrid abrasives.

DOI

10.30684/etj.2025.162757.1985

First Page

1208

Last Page

1228

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