Journal of The Japan Society of Electrical Machining Engineers
Online ISSN : 1881-0888
Print ISSN : 0387-754X
ISSN-L : 0387-754X
Volume 20, Issue 40
Displaying 1-3 of 3 articles from this issue
  • Shigenori SAKAI, Takahisa MASUZAWA
    1987 Volume 20 Issue 40 Pages 1-13
    Published: June 20, 1987
    Released on J-STAGE: March 12, 2010
    JOURNAL FREE ACCESS
    A quick finishing method is proposed for surfaces which are produced by wire-EDM. The process is basically a kind of electrochemical machining. The remainder part of the wire-cut material is used as a ‘mate-’ electrode. A NaNO3 solution is used as the electrolyte and flows through the gap between the workpiece and the mate-electrode. The experimental results show that the surfaces of many different kinds of metals, including tool steels, can be finished until mirrorlike within a few seconds. The technique can be applied not only to dies, but also to any parts produced by WEDM.
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  • [in Japanese], [in Japanese], [in Japanese]
    1987 Volume 20 Issue 40 Pages 14-23
    Published: June 20, 1987
    Released on J-STAGE: March 12, 2010
    JOURNAL FREE ACCESS
    Download PDF (768K)
  • Machining Characteristics of Glass and Ceramics
    Hachiro TSUCHIYA, Hidekazu GCTO, Makoto MIYAZAKI, Tomoichi INOUE
    1987 Volume 20 Issue 40 Pages 24-31
    Published: June 20, 1987
    Released on J-STAGE: March 12, 2010
    JOURNAL FREE ACCESS
    This paper deals with a new method of wire electro-chemical discharge machining of non-conductive materials such as ceramics.
    The method is achieved by combining the cutting technique of wire-EDM with electrochemical discharge machining used for drilling non-conductive materials such as glass, diamond and ruby immersed in an electrolyte. In its method a molybdenum wire of 0.1mm in diameter is employed as one electrode and platinum wire of 0.5mm in diameter as the other electrode. The electrolyte of KOH solution is fed to the contact area between the work specimen and the molybdenum wire.
    Glass and ceramic plates as work specimens can be successfully cut by the electric arcs generated along the contact line between the work specimens and the wire electrode in the electrolyte.
    The effects of the polarity of the electrodes, the types of the current, the voltage applied to the electrodes, and the conoentration of the electrolyte on the cutting rate and the kerf width are examined.
    The maximum cutting rate of silica glass (1.0mm in thickness), that of Al2O3 ceramic (1.2mm in thickness), that of Si3N4 ceramic (1.2mm in thickness) and that of ZrO2 ceramic (1.2mm in thickness) are 6.8mm/min, 0.3mm/min, 0.67mm/min and 0.2mm/min, respectively, The kerf width at the maximum cuting rate of silica glass, that of Al2O3 ceramic, that of Si3N4 ceramic and that of ZrO2 ceramic are 0.20mm, 0.31mm, 0.45mm and 0.13mm, respectively.
    The results obtained show that the method is effective for cutting glass and ceramic materials in two dimensional contour.
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