A Study for its Characteristics with Electric Variation in an Electrical Discharge Machining

방전가공에서 전기적 변화가 갖는 방전 특성에 관한 연구

  • 신근하 (아주대학교 기계공학과)
  • Published : 1997.12.01

Abstract

A study is a experiment which is figure out to optimum discharge cutting condition of the surface roughness, electronic discharging speed and electrode wear ration with Ton , Toff and V(voltage) as an input condition according to the current(Ip) in an electric spark machine : 1) Electrode is utilized Cu and Graphite. 2) Work piece is used the material of carbon steel. The condition of experiment is : 1) Current is varied 0.7(A) to 50(A) and the time of electric discharging to work piece in each time is 30(min) to 60(min). 2) After the upper side of work piece was measured in radius(5$\mu$m) of stylus analyzed the surface roughness to ade the table and graph of Rmax by yielding data. 3) Electro wear ratio is : \circled1Cooper was measured ex-machining and post-machining by the electronic balance. \circled2The ex-machining of graphite measured by it, the post-machining was found the data from volume $\times$specific gravity and analyzed to made its table and graph on ground the data. 4) In order to keep the accuracy of voltage affected to the work piece was equipped with the A.V. R and the memory scope was sticked to the electric spark machine. 5) In order to preserve the precision of current, to get rid of the noise occured by internal resistance of electric spark machine and to force injecting for the discharge fluid , it made the fixed table for a work piece to minimize the work error by means of one's failure during the electric discharging.

Keywords

References

  1. 型披術便覽 型技術學會
  2. JSPE v.57 放電加工における放電点分布の觀察 國技正典
  3. ワイアカシト放電加工技術 齊藤長男
  4. 放電加工ワイアカツト 鹽田泰仁
  5. 日本精密工學誌 v.57 no.5 超小型放電加工機の開發 古谷克司(외2인)
  6. 機械技術 v.36 no.2 妨電加工法による高速微細加工の技術動向 齊藤長男
  7. 放電加工の硏究聞發技術動向 v.157 no.6 木下夏夫
  8. CIRP v.38 no.1 A New Model Reference Adaptive Control of EDM K. P. Rajukar;W. M. Wang
  9. CIRP v.38 no.1 Drilling of Deep Microholes by EDM T. Masuzawa
  10. CIRP v.38 no.1 Effects of Ultrasonic Vibrations on the Perforences in EDM D. Kermer
  11. 精密機械 v.33 no.6 銅電極による電極低消耗妨電加工 木本保夫
  12. 日本造船技報 v.35 no.1 超硬質合金放電加工の電極消耗妨電加工の硏究 木本康雄;田官勝桓;田畑英彦
  13. Society of Manufacturing Engineering One SME Drive no.14 Tool and Manufacturing Engineers Handbook(vol-Machining) Thomas I. drozda;Charles Wick
  14. 禁型工作法 高木六彌
  15. 放電加工 柳濟九
  16. KS D 3752
  17. 방전가공 김창호