Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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ED-drilling of WC-Co to Minimize Electrolytic Corrosion on a Workpiece Surface

방전드릴링 시 발생하는 초경합금의 표면전해부식 방지

  • Song, Ki-Young (School of Mechanical and Aerospace Engineering, Seoul National Univ.) ;
  • Chung, Do-Kwan (School of Mechanical and Aerospace Engineering, Seoul National Univ.) ;
  • Park, Min-Soo (Division of Mechanical and Automotive Engineering, Wonkwang Univ.) ;
  • Chu, Chong-Nam (School of Mechanical and Aerospace Engineering, Seoul National Univ.)
  • 송기영 (서울대학교 기계항공공학부) ;
  • 정도관 (서울대학교 기계항공공학부) ;
  • 박민수 (원광대학교 기계자동차공학부) ;
  • 주종남 (서울대학교 기계항공공학부)
  • Published : 2009.08.01
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Abstract

In this study, a simple and effective method was proposed to minimize electrolytic corrosion on the workpiece during ED-drilling using water as a working fluid. The adhesion of a cover plate onto the surface of the workpiece was greatly effective for suppressing electrolytic corrosion during ED-drilling. The experiment revealed that the adhesion of the cover plate prevented corrosion without causing significant changes in machining characteristics. Using the machining method proposed in this paper, electrolytic-corrosion-free holes can be machined without change in the machinery system. By using corrosion-free hole as a start hole for wire EDM, a lead frame die with high quality was fabricated successfully.

Keywords

References

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