絶縁性セラミックスの放電加工における加工現象　　コンデンサ放電の効果

DOI Web Site 被引用文献9件 参考文献7件

書誌事項

タイトル別名
  • Machining Phenomena in EDM of Insulating Ceramics. Effect of Condenser Electrical Discharge.
  • ゼツエンセイ セラミックス ノ ホウデン カコウ ニ オケル カコウ ゲンショ
  • Effect of Condenser Electrical Discharge
  • コンデンサ放電の効果

この論文をさがす

抄録

Because of the high resistivity of insulating ceramics, there are some differences compared with the EDM of metallic materials. The secondary metal as an assisting electrode and a minus polarity of the electrode overcame the difficulties of machining for insulating ceramics. And the insertion of a condenser between the electrode and the workpiece improves the removal rate and the stability in electrical discharge machining for insulating ceramics. But there is no distinct explanation of the mechanisms. In this paper, we certified the mechanism and the effects of the condenser EDM for insulating ceramics as Si3N4, Sialon and SiC.<br>There are two types of the electrical discharge waveforms in the condenser EDM of insulating ceramics. A high electrical resistance of the surface causes a discharge with longer pulse duration than the settled value of discharge duration, which produces a lot of carbon from the working oil by heating. The low electrical resistance generates short discharge pulses which waste the carbon gradually. These waveforms are affected by a discharge-detection voltage, an equivalent resistance of ceramics' surface, and electrical parameters of discharge circuits. An adequate balance of a long pulse and short pulses makes it possible to machine insulating ceramics with high removal rate and high stability.

収録刊行物

被引用文献 (9)*注記

もっと見る

参考文献 (7)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ