http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
저주파 가진 시스템에 의해 성형된 마이크로 패턴의 특성 분석
박찬진(C. J. Park),최종필(J. P. Choi),박동영(D. Y. Park),홍남표(N. P. Hong),이혜진(H. J. Lee),이낙규(N. K. Lee),김성욱(S. O. Kim),주은덕(Andy Chu),김병희(B. H. Kim) 한국생산제조학회 2009 한국공작기계학회 추계학술대회논문집 Vol.2009 No.-
Many researchers have developed several micro-forming technologies such as micro deep drawnig, micro press forming, micro forging, extrusion etc. for forming of precise micro-patterns on a surface of metal substrate but the multi-step forming processes have been used to improve quality of the deformed patterns. The low frequency vibration forming system, which developed in the research, can not only easily deform the surface of metal substrates but also can remove the couple of steps of the conventional multi-step forming process. In order to find optimal process conditions, lots of experiments were carried out under varying the vibration frequency from 100㎐ to 500㎐. As a experimental results, The desktop micro forming system has obtained better results from low frequency vibrations than non-vibration.
저주파 가진 시스템에 의해 성형된 마이크로 패턴의 특성 분석
박찬진(C. J. Park),최종필(J. P. Choi),박동영(D. Y. Park),홍남표(N. P. Hong),이혜진(H. J. Lee),이낙규(N. K. Lee),김성욱(S. O. Kim),주은덕(Andy Chu),김병희(B. H. Kim) 한국생산제조학회 2009 한국생산제조시스템학회 학술발표대회 논문집 Vol.2009 No.10
Many researchers have developed several micro-forming technologies such as micro deep drawnig, micro press forming, micro forging, extrusion etc. for forming of precise micro-patterns on a surface of metal substrate but the multi-step forming processes have been used to improve quality of the deformed patterns. The low frequency vibration forming system, which developed in the research, can not only easily deform the surface of metal substrates but also can remove the couple of steps of the conventional multi-step forming process. In order to find optimal process conditions, lots of experiments were carried out under varying the vibration frequency from 100㎐ to 500㎐. As a experimental results, The desktop micro forming system has obtained better results from low frequency vibrations than non-vibration.
박찬진(C. J. Park),최종필(J. P. Choi),박동영(D. Y. Park),홍남표(N. P. Hong),이혜진(H. J. Lee),이낙규(N. K. Lee),김성욱(S. O. Kim),주은덕(Andy Chu),김병희(B. H. Kim) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
In this paper, the low frequency vibration forming system is developed for micro-patterns formation on the metal substrate. many researchers have studied about micro-forming technologies such as micro deep drawing, press forming, forging, extrusion etc. for the formation of precise micro-patterns on the surface of metal substrates, multi-step forming process must be used to improve qualifies of the deformed patterns. Since the low frequency vibration forming system could easily deform the surface of metal substrates, several steps of multi-step forming process should be removed by using the low frequency vibration forming system. In order to find optimal process conditions, we have carried out low frequency vibration forming process with varying the vibration frequency from 110Hz to 500Hz.
권기환(Ki-Hwan Kwon),제태진(Tae-Jin Je),유영은(Yeong-Eun Yoo),최두선(Doo-Sun Choi),박영우(Young-Woo Park) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Various micro-patterns are recently adapted to many product due to their good optical or mechanical properties and the aspect ratio of the pattern has increased for better performance. The forming or molding process, however, becomes more difficult especially due to higher releasing force for the higher aspect ratio of pattern. Many good designs for micro-pattern could not be applied for commercialized product due to mainly this processing issues. In this paper, releasing forces were measured experimentally and analyzed for several major processing parameters such as releasing speed, starting point(curvature shape) material characteristic. For experiment, micro-pattern, 40㎛ wide and 200㎛ deep, was machined on the brass block which is 50㎜×50㎜ and UV curabel resin was used as a molding material. The UV resin was coated on the PET film and micro pattern was formed on the coated UV resin layer using the pattern master. After curing the UV resin, releasing force was measured by 90 peeling test using tension tester. From a series of this releasing experiment, some effects of the processing parameters on releasing force could be figured out.Put
정지영(Ji-Young Jeong),제태진(Tae-Jin Je),문승환(SeungHwan Moon),이재령(Je-Ryung Lee),최대희(Dae-Hee Choi),김민주(Min-Ju Kim),전은채(Eun-chae Jeon) Korean Society for Precision Engineering 2016 한국정밀공학회지 Vol.33 No.5
Recently in the display industry, demands for high-luminance and resolution of display devices have been steadily increasing. Generally, micro linear patterns are applied to an optical film in order to improve its properties of light. However, these patterns are easily viewed to eyes and moire phenomenon can be occurred. Micro random patterns are proposed as a method to solve these problems, increasing light-luminance and light-diffusion. However, conventional pattern manufacturing technologies have long processing times and high costs making it difficult to apply to large area molds. In order to combat this issue, micro-random patterns are formed by using a roll to plate indentation method along with abrasive paper tools composed of AlSiO2, SiC, and diamond grains. Also, forming properties, such as size and fill-factor of random patterns, are analyzed depending on type, mesh of abrasive paper tools, and indentation forces.
강동배(D. B. Kang),손성민(S. M. Son),안중환(J. H. Ahn) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
A workpiece with a large surface area is likely to be uneven due to form error and waviness. These geometric disturbances can cause inaccurate micro shapes to be formed when micro features are micro-grooved into the surface and cause the resulting workpiece to fail to function as desired. Thus, real-time measurement and compensation is required to guarantee the form accuracy of micro features while machining a workpiece with a large surface area. In this study, a method is suggested for real-time measurement of geometric error for the micro grooving of a large flat surface using a laser displacement sensor. The measurements are demonstrated for the workpieces with large surface areas and the experimental results show that the waviness and form error are well detected.
마이크로 헤링본 패턴 점진성형공정의 해석 및 실험적 연구
송정한(J. H. Song),이혜진(H. J. Lee),박진호(J. Park),이율(Y. Lee),최석우(S. Choi),이형욱(H. W. LEe) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
In this paper, the forming process for the herringbone pattern is conducted through a finite element simulation and experimental verification. The investigated parameters from the analysis are the variation of groove depth, forming load, and amount of the elastic recovery in elasto-plastic micro forming. Analysis result demonstrates that the groove was uniformly shaped with depth of 3㎛ considering the elastic recovery except the tip area. The simulation result is coinciding with experimental one. This result reveals that the incremental forming can be utilized to make the herringbone pattern on the bearing shaft.