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This comparative study of the Electrical Discharge turning (EDT) machining process was conducted on Al7075 alloy, varying current intensities and rotational speeds. A 10 mm diameter A7075 aluminum alloy served as the workpiece material, and EDT technique was employed with a custom-built rotating spindle on a die sinking EDM machine. Copper electrodes of 2.1 mm diameter were used to form grooves on the cylindrical workpiece. The study investigated the impacts of various current (6A, 9A, and 12A) and rotational speed (1200, 1300, and 1400 RPM) on Material Removal Rate (MRR), Tool Wear Rate (TWR), and Overcut (OC). The experimental results revealed that increasing current led to higher MRR, TWR, and OC, attributed to the generation of heat energy for melting and vaporization. Similarly, higher rotational speeds resulted in increased MRR, TWR, and OC, with centrifugal force aiding in debris removal. This work summarizing that the current had a more pronounced effect than rotational speed on the machining characteristics of Al7075 alloy in the EDT process.

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Investigating the Impact of Varied Current and Rotational Speeds on the Machining Performance of Al7075 Alloy Using Electrical Discharge Turning

  • 会议论文

  • 发表日期：

    2025年

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  • Roopak Varshney,
  • Param Singh

摘要

This comparative study of the Electrical Discharge turning (EDT) machining process was conducted on Al7075 alloy, varying current intensities and rotational speeds. A 10 mm diameter A7075 aluminum alloy served as the workpiece material, and EDT technique was employed with a custom-built rotating spindle on a die sinking EDM machine. Copper electrodes of 2.1 mm diameter were used to form grooves on the cylindrical workpiece. The study investigated the impacts of various current (6A, 9A, and 12A) and rotational speed (1200, 1300, and 1400 RPM) on Material Removal Rate (MRR), Tool Wear Rate (TWR), and Overcut (OC). The experimental results revealed that increasing current led to higher MRR, TWR, and OC, attributed to the generation of heat energy for melting and vaporization. Similarly, higher rotational speeds resulted in increased MRR, TWR, and OC, with centrifugal force aiding in debris removal. This work summarizing that the current had a more pronounced effect than rotational speed on the machining characteristics of Al7075 alloy in the EDT process.