Drilling microholes in hot tool steel by using micro-electro discharge machining

T. Y. Tai, T. Masusawa, H. T. Lee

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)


This study presents an investigation into the drilling of a deep microholes with the depth of 320 μm in tool steel SKD61 by the Micro-EDM process. The electrode with the diameter of 26 μm is machined by the method of wire electrodischarge grinding (WEDG). Optical microscopy, scanning electron microscopy, and confocal laser scanning microscopy techniques are used to determine the influence of the process parameters upon hole enlargement, electrode wear rate, material removal rate, wear ratio, and the observed surface topography. The results of the study reveal the optimum parameter settings for the Micro-EDM machining of a high aspect ratio microhole are as follows: (1) a pulse voltage between 60 and 100 V, (2) a capacitance between 80 pF and 220 pF. Finally when the depth exceeds 200 μm, the shape of the micro hole almost becomes tapered due to the comer wear of the electrode and the secondary discharge along the side of the hole.

頁(從 - 到)205-210
期刊Materials Transactions
出版狀態Published - 2007 二月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業


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