• Title/Summary/Keyword: Large Surface Micro Machining

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Micro Pattern Machining on Larger Surface Roll Molds (대면적 롤금형 미세패턴 가공공정 기술)

  • Song, Ki-Hyeong;Lee, Dong-Yoon;Park, Kyung-Hee;Lee, Seok-Woo;Kim, Hyun-Cheol;Je, Tae-Jin
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.2
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    • pp.7-12
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    • 2012

  • In order to cope with the requirements of smaller patterns, larger surfaces and lower costs in the fields of displays, optics and energy, greater attentions are now being paid to the development of micro-pattern machining technology. Compared with flat moulds, large drums with micro patterns (roll moulds) have the advantages of short delivery, ease of manufacturing larger surfaces, and continuous moulding. This paper introduced the machining process technology of the roll moulds for display industry. The environmental effects were discussed and the importance of temperature maintenance was experimentally emphasized. The real time monitoring system for micro machining was introduced. A commercial solution was used to simulate the micro grooving and a deformation model of micro machined pattern was finally introduced.

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Structural Characteristic Analysis of an Ultra-Precision Machine for Machining Large-Surface Micro-Features (초정밀 대면적 미세 형상 가공기의 구조 특성 해석)

  • Kim, Seok-ll;Lee, Won-Jae
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.31 no.12
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    • pp.1173-1179
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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.

  • https://doi.org/10.3795/KSME-A.2007.31.12.1173 인용 PDF KSCI

Application of AE Sensor for Calibration of Depth of Cut in Micro-machining (마이크로 가공에서 절삭깊이 보정을 위한 AE 센서의 적용)

  • Kang, Ik-Soo;Kim, Jeong-Suk;Kim, Jeon-Ha
    • Journal of the Korean Society for Precision Engineering
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    • v.26 no.9
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    • pp.53-57
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    • 2009

  • There are technical requirements to manufacture large size functional parts with not only simple geometries like a flat or spherical surface but also sculptured geometries. In addition, the required machining accuracy for these parts is becoming more severe. In general, the form accuracy of machined parts is determined by the relative position between workpiece and tool during machining process. To improve machining accuracy the relative position errors should be maintained within the required accuracy. This study deals with the estimation and calibration of depth of cut using the AE signal in micro-machining. Also, this sensing technique can be applied to detect the initial contact between workpiece and tool.

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