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윤일채(Il-Chae Yoon),고태조(Tae-Jo Ko),이천(Chun Lee),김희술(Hui-Sul Kim),박동환(Dong-Hwan Park) 한국기계가공학회 2009 한국기계가공학회지 Vol.8 No.3
Recently, LCD Backlight Unit is being replaced from cold cathode fluorescent lamp(CCFL) to external electrode fluorescent lamp(EEFL) because the EEFL has high energy efficiency and long life. Also, it can reduce energy consumption and weight. So far, external electrode ring for EEFL is produced by sheet metal press forming process. Therefore it had low precision and much material loss. To solve these problems, Multi-Forming process that has five step forming process was invented. However, low productivity is another barrier. Product speed that is controlled by the rotational speed cannot be increased due to the unsatisfied design specification. The reason is that the gap between rolled two edge parts of the sheet plate is tightly inspected. Regarding this factor, the understanding of forming behavior to each process is inevitable. This paper describes the CAE analysis of the multi-forming process by PAM-STAMP.
Preliminary Study on Biomachining Process of Cooper
Jos Istiyanto(소스 이스티안토),Tae-Jo Ko(고태조),Il-Chae Yoon(윤일채) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6월
Machining process that use microorganism as the tool to remove metal from a work piece, also known as biomachining, is an alternative technologies in machining process since its environmental advantages. The study of characteristic of micromachining using microorganism such as Acidithiobacillus ferrooxidans is needed to explore and to improve its capability as an alternative machining process. The objective of this study is to characterize the surface roughness, the material removal rate and bacteria concentration in biomachining of cooper for 3 different machining time. Biomachining experiment and the results such as the change of surface roughness of work pieces and Material Removal Rate are presented.
Preliminary Study on Biomachining Process of Cooper
Jos Istiyanto(소스 이스티안토),Tae-Jo Ko(고태조),Il-Chae Yoon(윤일채) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6
Machining process that use microorganism as the tool to remove metal from a work piece, also known as biomachining, is an alternative technologies in machining process since its environmental advantages. The study of characteristic of micromachining using microorganism such as Acidithiobacillus ferrooxidans is needed to explore and to improve its capability as an alternative machining process. The objective of this study is to characterize the surface roughness, the material removal rate and bacteria concentration in biomachining of cooper for 3 different machining time. Biomachining experiment and the results such as the change of surface roughness of work pieces and Material Removal Rate are presented.
알루미늄 이너 타이로드 소켓의 냉간다단단조 유효성 검증
박재욱(Jae-Wook Park),최종원(Jong-Won Choi),정의은(Enn-Eun Jeong),윤일채(Il-Chae Yoon),강명창(Myungchang Kang) 한국기계가공학회 2022 한국기계가공학회지 Vol.21 No.1
Recently, the automobile industry has continued to demand lighter materials owing to international environmental regulations and increased convenience. To address this demand, aluminum parts have increased in popularity and are mainly developed and produced through hot forging and cold pressing. However, because this method has low yield and low production efficiency, a new manufacturing method is desirable. In this study, the water capacity efficiency of an aluminum inner tie rod socket was investigated using cold forging that provided a high yield and excellent production efficiency. Mechanical properties were derived through tensile testing of 6110A aluminum materials, and critical fracture factor and process analysis based on experimental data were carried out. The optimized process was applied as a prototype using cold multi-stage forging, and based on the derived results, the formability, productivity, and material efficiency of aluminum inner tie rod socket parts using this cold forging process was verified.