Journal of The Japan Society of Electrical Machining Engineers
Online ISSN : 1881-0888
Print ISSN : 0387-754X
ISSN-L : 0387-754X
Search
Advanced search
OR
Browse
Search
Volume 47, Issue 115
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Paper
  • Effect of working oil properties on processing characteristic in EDM (1st Report)
    - In the case of EDM of conductive material -
    Daiki HANAOKA, Toshiyuki WATANABE, Yasushi FUKUZAWA, Tomohiko KITAMURA
    Article type: Paper
    2013 Volume 47 Issue 115 Pages 81-87
    Published: 2013
    Released on J-STAGE: November 28, 2013
    DOIhttps://doi.org/10.2526/jseme.47.81
    JOURNAL FREE ACCESS
    Show abstractHide abstract
     Working oil in electrical discharge machining (EDM) enables effective machining and improves many important machining factors such as cooling, the maintenance of an insulation gap and the exhaust of debris. The physical properties of a working oil were investigated as one of the parameters determining the characteristics of EDM involving impulse discharge and sinking EDM (SEDM) for alloy tool steels. The effects of the kinetic viscosity, cooling capacity, and insulating capacity were examined in comparison with those of a standard reference oil, and we confirmed that an oil with high cooling capacity contributes to good performance and improved EDM characteristics.
    View full abstract
    Download PDF (912K)
  • Characteristics of Molding Die Determined by Electron Beam Irradiation
    Yoshihito HAGIHARA, Masaaki SANO, Akira OKADA
    Article type: Paper
    2013 Volume 47 Issue 115 Pages 88-96
    Published: 2013
    Released on J-STAGE: November 28, 2013
    DOIhttps://doi.org/10.2526/jseme.47.88
    JOURNAL FREE ACCESS
    Show abstractHide abstract
     This study was conducted to evaluate thermal fatigue characteristics of various electron beam (EB) - irradiated surfaces. EB - irradiated surfaces treated by gas nitriding were evaluated for thermal fatigue by surface roughness measurement, microscopic observation and X-ray residual stress measurement. Result indicate that the residual stress of electron beam processing is more dominant than that of preprocessing and that the residual stress decreases in the early stages of thermal fatigue examination in electron beam processing. Moreover, it was detemined that the processing in which gas nitriding was carried out controlled crack formation during thermal fatigue examination.
    View full abstract
    Download PDF (2678K)
  • Study on effect of assist gas in electrolyte jet machining
    Shoya KAI, Masanori KUNIEDA
    Article type: Paper
    2013 Volume 47 Issue 115 Pages 97-103
    Published: 2013
    Released on J-STAGE: November 28, 2013
    DOIhttps://doi.org/10.2526/jseme.47.97
    JOURNAL FREE ACCESS
    Show abstractHide abstract
     In electrolyte jet machining, by using a film flow formed after an electrolyte jet collides with a workpiece, the workpiece can be machined locally in the area of collision with the electrolyte jet by applying an electric current to the region. However, when the electrolyte flow rate is low, a hydraulic jump occurs near the jet and the film flow cannot be formed, thereby the workpiece cannot be machined locally. To solve this problem, we introduced an assist air jet coaxial to the electrolyte jet. The effect of the assist air jet on accelerating the radial flow of the electrolyte was clarified by hydrodynamic simulation. Machining experiments showed that the assist air jet has beneficial effects on machining stability at lower electrolyte flow rates, enabling higher aspect ratios in hole drilling and fabrication on concave surfaces.
    View full abstract
    Download PDF (1004K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top