形彫り放電加工特性に及ぼす放電加工油物性の影響（第１報）

－導電性材料の放電加工の場合－

抄録

 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.