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<p>This work presents the optimization of EDM process parameters such as pulse on-time (T<sub>on</sub>), pulse off-time (T<sub>off</sub>) and Current(I) to obtain the superior material removal rate (MRR) with less overcut, taper angle and circularity of EN8 steel using copper as the working electrode for machining. Optimization of drilling parameters for a high-hardness material is mandatory to increase the efficiency of the manufacturing process. During EDM, the workpiece is susceptible to different failures such as tool wear, higher taper angle and overcut. To overcome the issue, cryogenic treatment is carried out on the workpiece before machining resulting in increased strength and hardness. This increased strength and hardness make the machining process difficult, so as important machining features such as waviness, and circularity will be affected. The cryogenically treated EN8 steel was machined with a different combination of parameters using the copper tool. An attempt is made to optimize the process parameter in drilling the cryogenically treated EN8 Steel. Scanning electron microscopy was used to study the surface morphology of the tool and workpiece.</p>

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A comprehensive analysis of the EDM parameters of cryogenically treated EN8 steel in accordance with the Taguchi method

  • 期刊论文

  • 发表日期：

    2025年4月7日

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  • K Gnanasekaran,
  • N. Thangapandian,
  • D. Elil Raja,
  • Tushar Sonar,
  • S. Vinoth Kumar,
  • Ramesh Krishnan

摘要

This work presents the optimization of EDM process parameters such as pulse on-time (Ton), pulse off-time (Toff) and Current(I) to obtain the superior material removal rate (MRR) with less overcut, taper angle and circularity of EN8 steel using copper as the working electrode for machining. Optimization of drilling parameters for a high-hardness material is mandatory to increase the efficiency of the manufacturing process. During EDM, the workpiece is susceptible to different failures such as tool wear, higher taper angle and overcut. To overcome the issue, cryogenic treatment is carried out on the workpiece before machining resulting in increased strength and hardness. This increased strength and hardness make the machining process difficult, so as important machining features such as waviness, and circularity will be affected. The cryogenically treated EN8 steel was machined with a different combination of parameters using the copper tool. An attempt is made to optimize the process parameter in drilling the cryogenically treated EN8 Steel. Scanning electron microscopy was used to study the surface morphology of the tool and workpiece.