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최영재,홍원표,이동윤,이석우,최헌종 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
국내 제조업 중 중소기업간의 기술 협업은 국내 제조업이 살아남기 위한 중요한 화두로 대두되었다. 국내 기업의 구조가 계층적인 구조로 변화됨에 따라서, 과거 대기업이 전담했던 생산기능을 중소기업이 담당하게 함으로써 이들 사이에 기술협력이 이루어져야 한다. 이러한 과정에서 반드시 갖춰져야 할 요소가 바로 기업간 기술 및 품질 협업을 위한 협업 인프라의 확충이다. 이러한 문제를 해결하기 위해서 국내에서는 e매뉴팩처링 기반구축사업을 진행하고 있으며, e매뉴팩처링 기반구축사업은 실제로 대기업과 중견기업 간 협업, 중견 기업간 협업, 중견기업과 중소기업간 협업 프로세스를 분석하고 인터넷을 기반으로 하는 e매뉴팩처링 사업 수행의 기반을 다양한 기업 간 협업 비즈니스 모델을 도출하여 e매뉴팩처링 협업시스템으로 구축한 사례이다. 본 논문에서는 기업간의 일정한 역할에 따라 기술협업을 수행할 수 있는 협업모델을 제시하고 시스템을 구축함으로써 협업모델에 따른 기업간의 역할에 따른 정보시스템의 방향을 제시하고자 한다.
Austenite phase transformation of SKD11 by surface heat treatment with a focused electron beam
Kang, Eun Goo,Choi, Honzong,Min, Byung-Kwon,Lee, Sang Jo Elsevier Sequoia 2017 Surface & coatings technology Vol.321 No.-
<P><B>Abstract</B></P> <P>Recently, many studies have been actively conducted to improve the mechanical properties of metallic materials through surface heat treatment with an electron beam. Thermionic focused electron beam equipment is mainly used in industrial manufacturing machines such as e-beam welders. However, such equipment is expensive, and the filament lifetime is limited. In this study, the austenite transformation in an iron matrix was investigated after surface heat treatment of SKD11 with plasma diode focused electron beam equipment, which is a recently developed alternative based on a plasma diode cold cathode. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results revealed that the iron matrix transformed to an austenite structure without Cr-rich carbide formation. After the surface heat treatment using the plasma diode focused electron beam equipment, a positive residual stress was confirmed by XRD residual stress measurements. This result was obtained because impurities in the iron matrix such as carbon existed in alloy form rather than composite form. The average hardness at a depth of 300μm from the surface was measured to be approximately 480Hv.</P> <P><B>Highlights</B></P> <P> <UL> <LI> SKD11 was heat treated using plasma diode focused electron beam equipment. </LI> <LI> Depth of heat treatment increased with accelerating voltage. </LI> <LI> Improved surface hardness and corrosion resistance were achieved. </LI> <LI> Nearly complete austenite phase transformation was confirmed. </LI> <LI> The method is expected to improve mechanical fatigue life and wear resistance. </LI> </UL> </P>
류광열,남성호,최영재,이석우,최헌종 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
최근 국내 제조업체들의 중국진출 가속화 및 지속적으로 진행되어온 중소기업의 구조적ㆍ기술적 취약성 등으로 인해 특히 국내 중소 제조업체는 많은 어려움을 겪고 있다. 이러한 상황을 극복하고 기업간 기술협업 기반의 제조경쟁력 강화를 위하여 현재 i매뉴팩처링(한국형 제조혁신)사업이 추진 중에 있다. 본 논문에서는 i매뉴팩처링 사업을 통해 구축된 다양한 협업모델 가운데 성공적인 평기를 받고 있는, 가상기업 구성을 통한 중소기업 상생모델인 사출금형생산 협업허브 및 이에 대한 확대사례를 소개하고자 한다. 또한 본 논문에서는 기업 컨소시엄의 특성에 맞게 구축된 협업모델에 대해 기능강화를 통한 기업적용으로의 활용성 검증을 마친 기구축 협업허브를 신규 기업군을 대상으로 적용하는 과정에 대해 설명하며, 이러한 협업네트워크의 확산을 통해 기업경쟁력 강화에 어떠한 영향을 미칠 수 있는지에 대해서도 고찰해 보기로 한다.
자동차 부품 개발 협력사간 제품 개발 지원을 위한 웹 기반 디지털 목업(Digital Mockup) 환경 구축
이동윤(Dongyoon Lee),최영재(Youngjae Choi),최헌종(Honzong Choi),권기억(Kieak Kwon),박진표(Jinpyo Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Quality improvement and product development time shortening can be achieved by prevention steps of the various problem happening in the manufacturing stage. One of the most important prevention steps is the simulation of the capability of production and assembly by using 3D CAD Models, that is, Digital Mockup. This study aims to develop the web-based digital mockup environment which supports the collaboration between the small and medium sized enterprises of automotive industrial. The developed system can be applied in the case when the mockup simulation between different CAD systems is needed.
류광열(Kwangyeol Ryu),김보현(Bohyun Kim),최헌종(Honzong Choi) 대한산업공학회 2010 산업공학 Vol.23 No.2
Customer needs for final products are very unpredictable because product specifications and technologies are being improved very quickly thereby their requirement level is also elevated correspondingly. In order to survive and to enhance competitiveness in the global market, many manufacturing companies are trying to find a breakthrough from collaborization. Even though they want to collaborate with others, however, they do not exactly know what kind of system they have to develop or which technology they have to use. In this paper, therefore, we first investigate status and trend of information systems and infrastructure that are essential for collaboration. We then clearly describe definition and classification of collaboration with various point of views considering collaboration pattern, timing condition of collaborative activities, organizational structure, etc. With web-based collaboration systems already developed by i-Manufacturing (Korean-style Manufacturing Innovation) project, led by Korean government from 2004, we introduce main functions and analyze collaboration types of each system. Strategically important technologies for supporting collaboration will also be illustrated by reorganizing collaborization technologies after evaluating them with respect to emergency and importance of each technology. We hope this research will provide a guideline on collaboration especially for small and medium sized manufacturing companies.
김보현(Bohyun Kim),정소영(Soyoung Jung),최헌종(Honzong Choi),이성진(Sungjin Lee),장진영(Jinyoung Jang) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.6
The collaboration hub has been developed since 2004 as an online collaboration space, which supports the various collaborative works amongst small and medium enterprises using information sharing, collaboration project management, and project history management. Because of the change of manufacturing environment and rapid development of information technologies, it should be evolved from the existing version called Collaboration Hub 1.0. Recently, a lot of manufacturing enterprises know the importance of business process management(BPM) and start to introduce BPM systems. Our research group has developed the new version of Collaboration Hub 1.0 called Collaboration Hub 2.0 which contains the BPM concept, the consistent product data management, and the specialized functions overcoming the various variation of manufacturing. This study scrutinizes the meaning and role of the Collaboration Hub 2.0 and introduces an application study of it to the value chain of automobile module development consisted of a leading company and subcontractors. The case study covers the definition, execution and monitoring of collaboration process, the specialized functions overcoming the manufacturing variation and the key performance index of collaboration business.
Manufacturing Innovation Strategy via On-line Collaboration
이석우(Seokwoo Lee),류광열(Kwangyeol Ryu),최영재(Youngjae Choi),송기형(Kihyeong Song),최헌종(Honzong Choi) 한국로고스경영학회 2007 한국로고스경영학회 학술발표대회논문집 Vol.2007 No.7월
Unpredictable and ever changing customer demands make manufacturers difficult to get competition power enough to survive in the global market. To meet customer requirements dynamically changed. the manufacturing industry of today needs to equip with advanced technologies based on substantial infrastructure. Especially most mold makers in Korea. for example. are in labor shortage and fund starvation. Even though they have any specialized technology. they usually get in trouble to compete with big companies. Under this situation. we found that "collaboration" is the best solution for them to survive and to get competition power. Therefore. we have launched and conducted a project. referred to as an e- Manufacturing project. Note that e- Manufacturing is referred to as a system methodology enabling the integration of manufacturing operations and functional objectives of an enterprise by using intelligent IT technologies such as Internet. tether-free communication methods including wireless networking or web-based connections. In order to provide on-line collaboration environment. we have developed five kinds of hub systems for collaborative design and production of molds as well as parts/modules of an automobile while conducting e-Manufacturing project funded by the Korea government. Since the outcomes by utilizing each hub system are evaluated to be very beneficial for increasing competition power of Korean small and medium size companies. the Korea government will launch more bigger project. referred to as "i-Manufacturing project" which include nor only e-Manufacturing as a title of "innovation by informatization" but manufacturing processes and systems. In this paper, therefore. we briefly introduce the outline of the e-Manufacturing project and the strategy of i-Manufacturing project with the outcomes of the e-Manufacturing project in 2006 as well.