Improvement of material removal rate of Ti-6Al-4V alloy by electrical discharge machining with multiple ultrasonic vibration.

  • CHEN Sung Long
    Graduate Student, Department of Mechanical Engineering, National Central University
  • HUANG Fuang Yuan
    Department of Mechanical Engineering, National Central University
  • SUZUKI Yasuo
    Faculty of Engineering, Shizuoka University
  • YAN Biing Hwa
    Department of Mechanical Engineering, National Central University

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Other Title
  • 超音波複合振動付加によるTi‐6Al‐4V合金の材料除去率の改善
  • 超音波複合振動付加によるTi-6Al-4V合金の材料除去率の改善
  • チョウオンパ フクゴウ シンドウ フカ ニヨル Ti 6Al 4V ゴウキン

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Abstract

According to recent research the inferiority of electrical discharge machining performance of Ti–6Al–4V alloy was obvious. In this paper an efficient machining process, which combines electrical discharge machining and multiple ultrasonic vibration, is proposed for improving the material removal rate. The experimental results show that the materials removal rate of both SKD11 and Ti–6Al–4V alloy is remarkably improved with the proposed machining process, especially for Ti–6Al–4V alloy at small pulse duration. The improvement mechanism is assumed to be a fact that multiple ultrasonic vibration accelerates the ejection of debris out of the small gap between the facing materials, i.e., the electrode and workpiece. It is also shown that lower relative electrode wear is obtained, and the most significant effect is observed when machining with lower pulse duration or higher discharge current. Experimental result indicate that comparing with conventional electrical discharge machining, the proposed machining process produces a thinner recasting layer, although it is with slight deterioration in the finished surface.

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