• Title/Summary/Keyword: High precision

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Development of fundamental technologies on high precision mold for micro functional elements and parts (기능성 초정밀 핵심 요소부품 제조 초정밀 금형 기반기술 개발)

  • Je, T.J.;Lee, E.S.;Choi, D.S.;Kim, J.G.;Whang, K.H.;Yoon, J.S.;Chang, S.H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2009.05a
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    • pp.74-77
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    • 2009

  • Demands for high quality and productivity of precision mechanical parts are increasing greatly nowadays due to the rapid growth of information technologies and convergence industries. Therefore, core technologies for fabrication of precision mechanical parts are the fundamental issues, which are the precision machining, micro powder injection molding technologies, MR polishing, micro polymer processes, micro actuation modules and so on. These technologies are directly related to the mass production of high functional devices and machineries. Therefore, this study investigates the fabrication technologies of micro precision molds for advanced devices for possible commercialization in a near future.

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Thermal Characteristic Analysis of a High-Precision Centerless Grinding Machine for Machining Ferrules (페룰 가공용 초정밀 무심 연삭기의 열 특성 해석)

  • Kim S.I.;Cho J.W.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.06a
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    • pp.90-95
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    • 2005

  • To perform the finish outside-diameter grinding process of ferrules which are widely used as fiber optic connectors, a high-precision centerless grinding machine is necessary. In this study, the thermal characteristics of the high-precision centerless grinding machine such as the temperature distribution, temperature rise and thermal deformation, are estimated based on the virtual prototype of the grinding machine and the heat generation rates of heat sources related to the machine operation conditions. The reliability of the predicted results is demonstrated by the temperature characteristics measured from the physical prototype. Especially, the predicted and measured results show the fact that the high-precision centerless grinding machine consisted of the hydrostatic GW and RW spindle systems, hydrostatic RW feeding mechanism, RW swivel mechanism, on-machine GW and RW dressers, and concrete-filled steel bed, has very stable thermal characteristics.

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