巻号一覧
47 巻 (2013)
- 116 号 p. 155-
- 115 号 p. 81-
47 巻, 115 号
選択された号の論文の3件中1～3を表示しています
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研究
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－導電性材料の放電加工の場合－花岡 大生, 渡邉 利行, 福澤 康, 北村 友彦原稿種別: 研究
2013 年 47 巻 115 号 p. 81-87
発行日: 2013年
公開日: 2013/11/28
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (912K) -
萩原 義人, 佐野 正明, 岡田 晃原稿種別: 研究
2013 年 47 巻 115 号 p. 88-96
発行日: 2013年
公開日: 2013/11/28
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (2678K) -
甲斐 奨也, 国枝 正典原稿種別: 研究
2013 年 47 巻 115 号 p. 97-103
発行日: 2013年
公開日: 2013/11/28
ジャーナル フリー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.抄録全体を表示PDF形式でダウンロード (1004K)
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