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칼코겐유리렌즈 압축성형 시 표면결함을 고려한 가열조건 최적화
손병래(Byeong-Rea Son),안준형(Jun-Hyung Ahn),이영환(Young-Hwan Lee),황영국(Young-Kug Hwang) 한국기계가공학회 2021 한국기계가공학회지 Vol.20 No.8
This study aimed at identifying and optimizing the heating-condition parameters that cause surface defects during the compression molding of chalcogenide glass (GeSbSe) lenses through thermal analysis. We derived the optimal heating conditions for molding chalcogenide glass lenses through thermal analysis and analyzed the surface defects. As a result, we observed a significant reduction in surface defects, which verified the analysis process.
자동차 주행풍과 브레이크 캘리퍼 위치에 따른 비산먼지 포집기의 특성연구
손병래(Byeong-Rea Son),안준형(Jun-Hyung Ahn),이영환(Young-Hwan Lee),황영국(Young-Kug Hwang) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.3
A scattering dust collector in automobile brake pads was investigated in this study. The dust scattering was measured by mounting a booth with a particle counter for both the vehicle-induced wind and brake caliper locations. In addition, the collection effect of the dust scattering was analyzed using the designed dust collector. The results of this study can be used to develop an advanced dust collector and the field test modes for dust scattering in an automotive brake system.
김지관(Ji-Kwan Kim),최영수(Young-Soo Choi),안준형(Jun-Hyung Ahn),손병래(Byeong-Rea Son),황영국(Young-Kug Hwang) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.6
This study explores the compression molding of diffractive-aspheric lenses using GeSbSe chalcogenide glasses. A mold core with diffractive structure was prepared and a chalcogenide glass lens was molded at various temperatures using the corresponding core. The effect of molding temperature on the transcription characteristics of diffractive structure was examined, by measuring and comparing the diffractive structure between the mold core and the molded chalcogenide glass lens using a microscope and a white light interferometer. In addition, the applicability of the molded lens for thermal imaging was evaluated, by measuring the form error.