• Title/Summary/Keyword: 자기유변연마

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Conditioning of Magnetorheological finishing (자성유변연마의 컨디셔닝 기술)

  • 신영재;이응숙;김경웅;김영민
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.557-560
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    • 2003

  • Magnetorheological finishing(MRF) is a newly developed and recently commercialized for finishing optical components. The magnetorheological fluid consists of a water based suspension of carbonyl iron, nonmagnetic polishing abrasives, and small amounts of stabilizer. This magnetorheological fluid is pumped from conditioner on the rotating wheel and suctioned back to the conditioner, where it cooled to setpoint temperature and evaporative losses are replaced. This method could produce some problems in suction. So newly designed MRF tools is proposed in which MR fluid is not circulated and conditioned by the slurry. The new polishing mechanism is experimented. Measured surface roughness supports the validity of this mechanism.

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A Study on the Characteristics of Material removal using a Round endmill Type MR Polishing System for 3D Shape (3차원 형상 연마를 위한 라운드 엔드밀 타입 MR연마시스템의 재료제거 특성에 관한 연구)

  • Hong, Kwang-Pyo;Shin, Bong-Cheol;Kim, Dong-Woo;Cho, Myeong-Woo;Je, TAe-Jin
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.20 no.5
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    • pp.632-638
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    • 2011

  • Recently, it has been studying for the polishing process of micro parts widely. However, present MR polishing system, it is difficult to minimize electromagnet and to polish sphere or slope parts. Then, it can not be obtained demanded surface quality. In this study, material removal characteristics of BK7 glass using round endmill type MR polishing system were investigated through series of experiment. The experiments were investigated by changing imposed polishing conditions, such as rotational speed and polishing depth. As a results, very high material removal was obtained at 0.7mm gap distance, 1,980rpm.

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