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레이저 소결 방식 3D 프린팅 시스템에서의 최적 치수 보정 프로세스 연구
한휘영(Hweeyoung. Han),하상호(Sangho. Ha),김남훈(Namhun. Kim),김현남(Hyeonnam. Kim),황철웅(Cheolwoong. Hwang),신현식(Hyunshik. Shin),박규종(Kyujong. Park) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
Recently, 3D printing (3DP) is spotlighted as an innovative production method having potentials to change the manufacturing businesses in various industries. Also, in automotive industry, companies widely recognize the 3D printing technology as a promising manicuring method, so that they utilize 3D printers in their design, development, research and production processes. In automotive industries, however, the application of 3D printing technology is still quite limited to design processes due to the low cost-effectiveness and the lack of engineering reliability. Especially, the selective laser sintering (SLS) 3D printers, known as offering high engineering quality and durability of products, are popularly used in auto part development processes, the dimensional displacements of the 3D printed parts, however, hinder automakers from utilizing the technology directly to enhance their development process. The SLS 3D printers normally produce curved shapes due to thermal deformation (thermal expansion and thermal contraction) caused in the powder sintering process, which accompanies two-phase deformations. In this research, we aim to investigate and analyze the deformation tendencies of SLS 3D printed samples by sizes, shapes, locations in the platform (on 3D Systems’ sPro60 SD). At the end of the paper, we propose an algorithm to predict the deformation and calibrate pointbased 3D cad STL files of samples to mitigate the dimensional deformation with simple shaped samples for the illustrative purposes.
제조업 공급망 온톨로지 기반 적응형 ERP 모듈 시스템 프레임워크
오영광(Yeonggwang Oh),한휘영(Hweeyoung Han),신동민(Dongmin Shin),김동철(Dongchul Kim),김남훈(Namhun Kim) 대한산업공학회 2015 대한산업공학회지 Vol.41 No.4
Recently, an ERP (Enterprise resource Planning) system has been becoming an essential S/W tool for companies to manage their business processes and manufacturing resources. As the information exchange becomes more complex, not only corporate companies but also small- and mid- sized enterprises (SMEs) are required to build an ERP system. However, for small- and middle- sized companies, the adoption of ERP systems becomes challenging due to high cost and long installation time of the system. This paper presents a novel concept of an adaptive ERP system incorporating the ontology structure of the business supply chain information. The proposed ERP installation methodology is illustrated with an example of a door-trim manufacturing company in the automotive supply chain.