Sensing a State of Machining with the Voltage Waveform in EDM.

• SATO Tatsushi

  三菱電機 (株) 産業システム研究所

• IMAI Yoshihito

  三菱電機 (株) 産業システム研究所

• AKAMATSU Koji

  三菱電機 (株) 名古屋製作所

• GOTO Akihiro

  三菱電機 (株) 名古屋製作所

• OZAKI Yoshio

  三菱電機 (株) 名古屋製作所

• KOBAYASHI Kazuhiko

  三菱電機 (株) 技術研修所

Bibliographic Information

Other Title

• 放電電圧波形に基づく加工状態検出

Abstract

In die-sinking EDM, sensing a state of machining is important for both preventing surface damage and improving material removal rate. This paper describes how to sense a state of machining using voltage waveform between a tool electrode and a workpiece. By examining 8 characteristics of the waveform, it is found that the average and the variance of the discharge voltage change acccording to the state of machining. It is also shown that discharge pulses are discriminated into two groups with these two characteristics. In a very bad state of machining, the variance is found to be better sensing parameter than the average. For practical purpose, sensing with high frequency component of the discharge voltage is examined and it is found to have the same capability as sensing with the variance. With the high-frequency method, every pulse is classified into effective or non-effective pulse in realtime. It is shown that the accumulation of effective pulses follows the penetration depth. This proves that the proposed method is practical for sensing a state of machining.

Journal

• Journal of The Japan Society of Electrical Machining Engineers

  Journal of The Japan Society of Electrical Machining Engineers 29 (62), 27-39, 1995

  Japan Society of Electrical Machining Engineers

Details

• CRID: 1390001206233583616
• NII Article ID: 10002439477
• NII Book ID: AN00151681
• DOI: 10.2526/jseme.29.62_27
• ISSN: 18810888
• ISSN: 0387754X
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed