弾性体支持電極を用いた放電加工

（弾性体への押付力が加工速度に及ぼす影響）

抄録

To diversify the shape of the hole which removal machining can fabricate, our laboratory has developed the devices which can fabricate a hole on the inside wall of another hole by using them with a die-sinking electrical discharge machine (EDM). In the developing process, it was found that an elastically supported electrode can fabricate a hole with high aspect ratio under stable electrical discharge machining and at high material removal rate. In order to make a comparison, the laboratory developed the device which can realize electrical discharge machining using the elastically supported electrode under the identical conditions with electrical discharge machining using an ordinary electrode. The last study made it clear that a certain amount of pressing force applying to the elastic support is the key to achieve both the stable electrical discharge machining and the high material removal rate. However, the relationship between the pressing force and the material removal rate was unknown. Therefore, this study has revealed this relationship quantitatively.