Formation of Fine Graphite Electrode by YAG Laser.

• KUBOTA Shin'ichiro

  岡山県工業技術センター

• UNO Yoshiyuki

  岡山大学工学部

• NISHIHARA Nobuyuki

  岡山大学大学院 現JR西日本

• TAKAGI Takashi

  イビデン (株)

Bibliographic Information

Other Title

• ＹＡＧレーザによる微細グラファイト電極の成形に関する研究
• YAG レーザ ニヨル ビサイ グラファイト デンキョク ノ セイケイ ニカン

Abstract

This paper deals with machining methods of fine graphite electrode for EDM by Q-switched Nd: YAG laser. Graphite is a superior material as an electrode for EDM and has widely been used. However, it is difficult to make a complicated shape of thin graphite plate less than 1mm by the conventional machining methods because of its brittleness. In this paper, Q-switched Nd: YAG laser is used for machining the micro rectangular parallelepiped graphite electrode whose thickness is 0.35mm.<br>Main conclusions obtain are as follows:<br>1. The rectangular parallelepiped whose sections is about 0.35mm square can be machined precisely by Q-switched YAG laser.<br>2. Cutting off method of 2 plates of workpieces together leads to a better rectangular parallelepiped shape of the lower plate.<br>3. The roughness of machined surface is improved by another scanning with lower power laser.<br>4. In normal polarity EDM with RC circuit in deionized water, a better rectangular hole can be generated with copper impregnated graphite electrode.

Journal

• Journal of The Japan Society of Electrical Machining Engineers

  Journal of The Japan Society of Electrical Machining Engineers 32 (70), 40-48, 1998

  Japan Society of Electrical Machining Engineers

Details

• CRID: 1390282681210838656
• NII Article ID: 130003707638
• NII Article ID: 10002439838
• NII Book ID: AN00151681
• DOI: 10.2526/jseme.32.70_40
• ISSN: 18810888
• ISSN: 0387754X
• NDL BIB ID: 4535983
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4535983
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed