• 제목/요약/키워드: Dry electrical discharge machining (EDM)

검색결과 4건 처리시간 0.019초

건성 와이어방전가공 프로세스 특성에 관한 실험적 연구 (Experimental Study on Characteristics of Dry Wire Electrical Discharge Machining (EDM) Process)

  • 이상원;김홍석
    • 한국정밀공학회지
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    • 제27권1호
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    • pp.11-17
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    • 2010
  • This study investigates the non-traditional manufacturing process of dry wire electrical discharge machining (EDM) in which liquid dielectric is replaced by a gaseous medium. Wire EDM experiments of thin workpieces were conducted both in wet and dry EDM conditions to examine the effects of spark cycle (T), spark on-time ($T_{on}$), thickness of work pieces, and work material on machining performance. The material removal rate (MRR) in the dry wire EDM case was much lower than that in the wet wire EDM case. In addition, the thickness of workpiece and work-material were found to be critical factors influencing the MRR for dry EDM process. The relative ratios of spark, arc and short circuit were also calculated and compared to examine the effectiveness of processes of dry and wet wire EDM.

고압 $O_2$ 가스를 이용한 기체 미세방전가공의 특성 평가 (The Characteristic Evaluations of Oxygen Gas Assisted Dry Micro Electrical Discharge Machining)

  • 유병한;민병권;이상조
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2005년도 춘계학술대회 논문집
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    • pp.1571-1574
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    • 2005
  • Generally, the kerosene or the deionized water has been used for dielectric fluid in the electrical discharge machining. The spark occurs when the voltage is over the breakdown voltage and induces high temperature. In this study, the Oxygen gas is used as the dielectric. The voltage behavior in the dry Micro Electrical discharge machining is compared with that of the conventional Micro Electrical discharge machining. The dry Micro EDM has some advantages. The electrode wear isvery smaller than that of the conventional Micro EDM. The contamination in the dry Micro EDM can be drastically reduced comparing to that of the conventional Micro EDM. The Oxygen gas can be replaced as the dielectric successfully.

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데스크톱 건성 방전가공 시스템의 개발 및 실험적 성능평가 (Development of Desktop Dry Electrical Discharge Machining (EDM) System and Experimental Performance Evaluations)

  • 이상원;오영석;안수홍
    • 한국정밀공학회지
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    • 제27권1호
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    • pp.119-124
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    • 2010
  • This paper addresses the design and fabrication of desktop die-sinking dry electrical discharge machining (EDM) system and its experimental performance analysis. The developed desktop dry EDM machine has the horizontal configuration with the size of $300{\times}200{\times}260mm$. The experimental performance analysis is conducted to investigate the effects of EDM conditions and dielectric gas temperature on the surface roughness of EDMed slots and number of EDM sparks. The experimental results demonstrate that low feed rate and large electrode displacement are good for better surface roughness and more number of EDM sparks. In addition, low temperature of dielectric gas results in better surface roughness.