| 摘要 |
PURPOSE:To improve the restoring characteristics of insulation between wire and electrode by a structure wherein material, which is liquid or melt at room temperature and molten at elevated temperature and pressure, is impregnated in a large number of pores formed in graphite material so as to heighten the density of the graphite electrode. CONSTITUTION:Either one of metals such as Cu, Al, Pb and Sn and various kinds of glass such as lead glass and alkali glass, all of which mentioned above have melting points below 1,500 deg.C at elevated temperature and pressure, and liquid organic metal compound such as silicon oil and the like is impregnated in the pores of the graphite material in order to obtain the electrode for wire-cut electric discharge machining. |
