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    • 10. 发明授权
    • Electric discharge machining apparatus
    • 放电加工机
    • US5837957A
    • 1998-11-17
    • US807866
    • 1997-02-26
    • Tatsushi SatoYoshihito ImaiTomoko SendaiHidetaka MiyakeTakashi YuzawaTakuji Magara
    • Tatsushi SatoYoshihito ImaiTomoko SendaiHidetaka MiyakeTakashi YuzawaTakuji Magara
    • B23H1/04B23H1/06C04B35/52
    • B23H1/04B23H1/06
    • An electric discharge machining apparatus in which at least either of a tool electrode or a workpiece is made of an anisotropic conductive material, includes, on a good conductive surface 20b of the anisotropic conductive material 2, a portion for connecting an isotropic conductive member 22. Electric discharge is generated on the good conductive surface 20b of the anisotropic conductive material 2. A conductive adhesive agent 23 is employed to bond the anisotropic conductive material 2 and the isotropic conductive member 22 to each other. The anisotropic conductive material is a pyrocarbon material. The pyrocarbon heat resolved carbon material is employed as a tool electrode material. Incombustible dielectric fluid, such as pure water, is employed as dielectric fluid. Moreover, there are provided apparatus for measuring voltage during electric discharge, apparatus for setting a threshold value for use to determine whether the electric discharge is normal electric discharge or abnormal electric discharge and apparatus for interrupting supply of a discharge current in a case where the measured discharge voltage is higher than the threshold value.
    • 一种放电加工装置,其中工具电极或工件中的至少一个由各向异性导电材料制成,在各向异性导电材料2的良导电表面20b上包括用于连接各向同性导电部件22的部分。 在各向异性导电材料2的良好导电表面20b上产生放电。使用导电粘合剂23将各向异性导电材料2和各向同性导电构件22彼此接合。 各向异性导电材料是热解碳材料。 热解碳碳材料用作工具电极材料。 不可燃介质流体,例如纯水,被用作介电流体。 此外,还提供了用于在放电期间测量电压的装置,用于设定用于确定放电是正常放电还是异常放电的阈值的装置以及在所测量的情况下中断放电电流的供应的装置 放电电压高于阈值。