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      https://www.ias.ac.in/article/fulltext/sadh/044/10/0211

    • Keywords

       

      Material removal rate; surface roughness; tool wear rate; low-frequency vibrational-EDM; AHP; MOORA.

    • Abstract

       

      Integrated vibration in electrical discharge machining (EDM) plays a key role in achieving high efficiency. High levels of variables can be employed in this approach due to integration. However, simultaneous optimization of the EDM parameters to achieve multi-objectives is still very complex and challenging. Studies on integrated vibration are still in a preliminary stage. This report addresses multi-objective optimization in EDM for SKD61 die steel using low-frequency vibration. MOORA (Multi-objective optimization based on ratio analysis) was chosen to resolve this multi-objective optimization problem. The material removal rate (MRR), tool wear rate (TWR) and surface roughness (SR) were selected as performance measures in the EDM process. An analytical hierarchical process (AHP) was used to determine the weight value of the quality indicators. The results indicate that low-frequency vibrations significantly improve machining efficiency. When the frequency of the vibrations increased, MRR increased significantly such that MRRMAX = 64.48%. TWR and SR are smaller and their increase are given as TWRMAX = 20.3% and SRMAX = 18.47%. MOORA has been identified as a suitable alternative to multi-objective optimization in an EDM process using low-frequency vibrations for an assigned workpiece. The optimum parameters required to achieve the multi-objective were Ton = = 25 μs,I = 8 A, Tof = 5.5 μs and F = 512 Hz, at the resultant quality criteria of MRR = 9.564 mm³/min, TWR = 1.944 mm³/min and SR = 3.24 μm with a maximum error of 8.24%.

    • Author Affiliations

       

      PHAN NGUYEN HUU1 LONG BANH TIEN2 QUY TRAN DUC1 DONG PHAM VAN1 CHUNG NGUYEN XUAN1 THIEN NGUYEN VAN1 LUAN NGUYEN DUC1 MUHAMMAD JAMIL3 AQIB MASHOOD KHAN3

      1. Faculty of Mechanical Engineering, Hanoi University of Industry, Hanoi, Vietnam
      2. School of Mechanical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
      3. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
    • Dates

       
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