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뿌리산업의 스마트 공장 구축을 위한 스마트 공장 패키지 S/W 구성 및 클라우드 기반 서비스 시스템
송기형(Ki Hyeong Song),정홍진(Hong Jin Jeong),이동윤(Dong Yoon Lee),김보현(Bo Hyun Kim) 한국생산제조학회 2020 한국생산제조학회지 Vol.29 No.4
The root industry is poorer than other industries in terms of manufacturing environment, including personnel, facility, budget, and information technology usage. For information systems in this industry, a packaged software is preferred for developing a customized software suitable for its manufacturing environment owing to the introduction time and software cost. This paper proposes a method for quick configuration of a package software, considering requirements of an SME in the root industry, and a service system for SMEs to enable package software access at any time and place. The key mechanism for configuring the package software involved classifying the software functions extracted by SMEs into three templates, according to the smartization level of SMEs. The cloud-based service system’s architecture was designed to configure the package software easily and manage its version, history, and users. Implementing the prototype service system revealed its usability and generated research issues that should be examined continuously.
송기형(Ki-Hyeong Song),이동윤(Dong-Yoon Lee),박경희(Kyung-Hee Park),이석우(Seok-Woo Lee),김현철(Hyun-Cheol Kim),제태진(Tae-Jin Je) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.2
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 aintenance 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.
단결정 다이아몬드공구 제작 기술을 통한 초정밀 미세패턴 가공 연구
정성택,송기형,최영재,백승엽,Jung, Sung-Taek,Song, Ki-Hyeong,Choi, Young-Jae,Baek, Seung-Yub 한국금형공학회 2020 한국금형공학회지 Vol.14 No.3
As the consumer market in the VR(virtual reality) and the head-up display industry grows, the demand for 5-axis machines and grooving machines using on a ultra-precision machining increasing. In this paper, ultra-precision diamond tools satisfying the cutting edge width of 500 nm were developed through the process research of a focused ion beam. The material used in the experiment was a single-crystal diamond tool (SCD), and the equipment for machining the SCD used a focused ion beam. In order to reduce the influence of the Gaussian beam emitted from the focused ion beam, the lift-off process technology used in the semiconductor process was used. 2.9 ㎛ of Pt was coated on the surface of the diamond tool. The sub-micron tool with a cutting edge of 492.19 nm was manufactured through focused ion beam machining technology. Toshiba ULG-100C(H3) equipment was used to process fine-pattern using the manufactured ultra-precision diamond tool. The ultra-precision machining experiment was conducted according to the machining direction, and fine burrs were generated in the pattern in the forward direction. However, no burr occurred during reverse machining. The width of the processed pattern was 480 nm and the price of the pitch was confirmed to be 1 ㎛ As a result of machining.
사출성형 유동해석 서비스 납기단축을 위한 프로세스 개발
이동윤(Dong-yoon Lee),송기형(Ki-hyeong Song),최영재(Young-jae Choi),이석우(Seok-woo Lee),최헌종(Hon-zong Choi) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The importance of simulation of plastic flow in the injection mold is increasing as the parts are more complex, but the small-scale enterprises can’t afford to invest for the infra individually. CAE (Computer Aided Engineering) service was naturally born based on these needs. This paper presents the engineering collaboration model between the large and the small/medium enterprises in the field of injection molds. Based on the engineering collaboration hub and CAE service, small-scale enterprises could research the necessary technology and develop the proper products. The analysis results of CAE are provided by the integrated visualization system on the web. This paper also deals with the delivery shorting process of CAE service for electric/electronic parts which should meet the needs of customers as soon as possible.
공구 중심점의 변위 최소화를 위한 문형 공작기계의 크로스레일 개선 연구
이명규(Myung-Gyu Lee),송기형(Ki-Hyeong Song),최학봉(Hag-Bong Choi),이동윤(Dong-Yoon Lee) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.3
General portal machine represents a distinct weak spot concerning their structural behavior because of long protruding structure components, such as saddles and rams. The weak point causes the deformation of the machine tool and consequently rises a severe machining error. The purpose of this study is to improve the structural design of crossrail in order to minimize it’s distortion. Tool Center Point (TCP) was chosen as a reference point for evaluating the distortion effect of a crossrail and topological optimization was adopted as a method of structural design improvement. The displacements of TCP according to the machining positions were investigated by structural analyses for both of original crossrail design and the improved one. The comparing results showed that the displacement of TCP could be reduced about 55% maximum.