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Lee, Dong-Yoon;Hong, Sang-Hyun;Song, Ki-Hyeong;Kang, Eun-Goo;Lee, Seok-Woo
- Transactions of the Korean Society of Mechanical Engineers A
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- v.35 no.1
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- pp.33-37
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- 2011
In the fields of display, optics, and energy, it is important to improve micropattern-machining technology for achieving small patterns, large surface areas, and low cost. Unlike flat molds, roll molds have the following advantages: they can be manufactured within a short time, larger surface areas can be obtained, and continuous molding can be achieved. In this study, we aim to investigate the causes for errors in the shapes for a micropattern-machining process, and we show that by compensating the dynamic balance of roll molds, the dimensional accuracy of machined parts can be improved. The experimental results show that dynamic-balance compensation for a roll mold reduced the mass unbalance and the vibrations of the roll mold, and as a result, the dimensional accuracy of machined micropatterns has been improved.
https://doi.org/10.3795/KSME-A.2011.35.1.033 인용 PDF KSCI

Song C.K.;Park C.H.;Hwang J.H.;Kim B.S.
- Proceedings of the Korean Society of Precision Engineering Conference
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- 2005.10a
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- pp.86-93
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- 2005
In this paper, we discuss the merits of mechanical machining to generate micro features on large surfaces. An overseas technology trend related to the micro machining and dedicated machinery is also presented. We provide an overview of what characteristics the machinery is required to have to generate micro features on large surfaces and what kind of technical barriers need to be overcome to put the technology to practical use.
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Kim, Seok-Il;Lee, Won-Jae
- Proceedings of the KSME Conference
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- 2007.05a
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- pp.1469-1474
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- 2007
In recent years, research to machine large-surface micro-features has become important because of the light guide panel of a large-scale liquid crystal display and the bipolar plate of a high-capacity proton exchange membrane fuel cell. In this study, in order to realize the systematic design technology and performance improvements of an ultra-precision machine for machining the large-surface micro-features, a structural characteristic analysis was performed using its virtual prototype. The prototype consisted of gantry-type frame, hydrostatic feed mechanisms, linear motors, brushless DC servo motor, counterbalance mechanism, and so on. The loop stiffness was estimated from the relative displacement between the tool post and C-axis table, which was caused by a cutting force. Especially, the causes of structural stiffness deterioration were identified through the structural deformation analysis of sub-models.
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