• 제목/요약/키워드: Ultrahigh-speed air turbine spindle

검색결과 3건 처리시간 0.018초

미세가공을 위한 마이크로 공구동력계 개발 (Development of the Micro Tool Dynamometer for Micro Machining)

  • 권동회;황인옥;강명창;김전하;김정석;안중환
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.217-218
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    • 2006
  • This paper presents an investigation on the characteristics for new micro tool dynamometer by using the ultrahigh-speed air turbine spindle. Recently, the ultrahigh-speed micro flat endmilling has been investigated actively due to request of accuracy improvement and productivity of die and mould manufacturing. To perform efficient ultrahigh-speed micro flat endmilling, evaluation of ultrahigh-speed machinability must be studied preferentially and it can be identified by investigation of cutting force. The cutting forces in ultrahigh-speed micro flat endmilling can be measured by micro tool dynamometer. But general dynamometer has low natural frequency and so is improper for measuring very high frequency cutting forces in ultrahigh-speed micro flat endmilling. In this study, the micro tool dynamometer which has very high natural frequency is newly designed.

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초고속 스핀들에 의한 마이크로 엔드밀링의 가공특성에 관한 연구 (A Study on the Machining Characteristics for Micro Endmilling by using Ultrahigh-Speed Air Turbine Spindle)

  • 권동희;강익수;김전하;강명창;김정석
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2005년도 추계학술대회 논문집
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    • pp.598-603
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    • 2005
  • Recently, the advanced industries using micro parts are rapidly growing. The appearance of ultra-precision feed mechanism and the development of control system make it possible to process parts in sub millimeter scale by mechanical methods. Micro endmilling is one of the prominent technology that has wide spectrum of application field ranging from macro parts to micro products. So, micro stairs have been trying to cut by using high revolution air turbine spindle and micro-endmill, and studying for magnitude of cutting force. This investigation deals removal characteristics of burr generated by micro endmilling process. Also, decreasing of burr is significant problem in making smooth and precise parts in micro endmilling. In micro endmilling, the material removal rate(MRR) and cutting forces are very small. This paper presents an investigation on the machining characteristics for micro stairs by using ultrahigh-speed air turbine spindle in machining.

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마이크로 엔드밀링에서 가공깊이에 따른 가공변질층의 특성 (The Characteristics of Damaged Layer According to Depth of Cut in Micro Endmilling)

  • 이종환;권동희;박진효;김병민;정융호;강명창;이성용;김정석
    • 한국공작기계학회논문집
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    • 제16권5호
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    • pp.77-83
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    • 2007
  • The study on damaged layer is necessary for machinability improvement in micro machining. The damaged layer in metal cutting is derived from plastic deformation and transformation of metal structure. The damaged layer affects micro mold life and micro machine parts. In this study, the damaged layer of micro machined surface of copper is evaluated according to various machining condition. The damaged layer structure and metallurgical characteristics are measured by optical microscope, and evaluated by cutting forces and surface roughness. The scale of this damaged layer depends on cutting process parameters and machining environments. By experimental results, depth of damaged layer was increased with increasing of cutting depth, also the damaged layer is less occurred in down-milling compared to up-milling during micro endmilling operation.