http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최승건,김성현,최웅걸,이은상 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.9
Invar alloy is important material used for the OLED (Organic light emitting diode) shadow-mask in the mobile display industry due to its characteristics of smallest thermal expansion coefficient. Consumers in modern society demand higher display resolution. Electrochemical machining is one of the methods for obtained these high-resolution requirements. Electrochemical machining is a non-contact method that has advantages regarding defects like thermal strain and micro burrs compared to other non-conventional machining methods. For precision electrochemical machining using different shape electrodes, the current density should be controlled precisely. The purpose of this study is to apply the FEM (Finite elements method) analysis in order to investigate the current density in the electrochemical machining. And the current density distribution between invar alloy and electrode are carried out with shape electrode type and micro array film type under the same conditions by simulation methods. FEM analysis results show that using shape electrode type, current density distribution is very concentrated. And also by micro array pattern film, desired current density which is needed for electrochemical machining could be obtained easily. More precise electrochemical machining can be available by controlling the current density between the suitable type and invar alloy.
수직형 복합 연삭시스템 베드의 동특성 해석에 관한 연구
최승건(Seung-Geon Choi),김성현(Seong-Hyun Kim),최웅걸(Woong-Kirl Choi),신현정(Hyun-Jung Shin),이은상(Eun-Sang Lee),김규동(Kyu-Dong Kim) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.5
Machine tools are the cores of industrial development in recent period. It is difficult to develop a system which can do cutting and grinding process in the one system. Hybrid Vertical Grinding System is capable of processing in a single apparatus cutting or grinding. The modal analysis and structural analysis for the development of Hybrid Vertical Grinding System is the first time of domestic work. In this study, Hybrid Vertical Grinding System bed was designed and analyzed by using SS401 and FC300 as materials. And by using Finite Element Methods, the design and material of the bed was analysed. Finally, we can make a better choice of structure and material of the bed by comparing the analysis results.
최승건(Seung Geon Choi),김성현(Seong Hyun Kim),최웅걸(Woong Kirl Choi),이은상(Eun Sang Lee),최지훈(Ji Hun Choi),이석주(Seok Joo Lee),김규동(Kyu Dong Kim) Korean Society for Precision Engineering 2013 한국정밀공학회지 Vol.30 No.11
Machine tools are the cores of industrial development in recent period. It is difficult to develop a system which can do cutting and grinding process in the one system. Hybrid Vertical Grinding System is capable of processing in a single apparatus cutting or grinding. The modal analysis and structural analysis for the development of Hybrid Vertical Grinding System is the first time of domestic work. This paper describes the technologies of Hybrid Vertical grinding machine and intend to introduce the studies in the development of the Hybrid Vertical Grinding System.