• Journal of Venture Innovation
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• 제2권1호
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• pp.1-11
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• 2019

Many research or consulting institute refered to Artificial Intelligence, Internet of Things, Blockchain technology and 3D Printing as key driving forces and technologies of 4th industrial revolution. Compared with traditional manufacturing as a subtractive manufacturing(SM), 3D printing technology as an additive manufacturing(AM) will revolutionary impacts on many industries. This study compared 3D printing with traditional manufacturing in the economic, manufacturing, and marketing perspectives. This study also analyzed issues of 3D printing for the purpose of building business ecosystem. Finally agenda for the further research were suggested.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제18권11호
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• pp.802-809
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• 2017

3D printing technology is a manufacturing process for products, in which polymer and metal materials are laminated to form structures. It is advantageous for manufacturing parts requiring a high degree of design freedom and functionality. In addition, it would be a suitable technology for the production of parts for railway vehicles in the future, due to the need to produce parts in small quantities. In order to fully exploit the advantages of 3D printing technology, it is necessary to consider the process characteristics during the design of the product. In this study, the redesign and manufacturing technology of the product considering the performance and process conditions were studied for the heat exchanger in the air compressor of railway vehicles, as a trial application of the 3D printing technique. First of all, the design concept to improve the performance of the heat exchanger was defined, and the design range was specified to satisfy the performance of the present heat exchanger analyzed experimentally. Then, the detailed design was revised considering the characteristics of the metal 3D printing process, such as the manufacturing restrictions and production time. Based on the final design, the product was fabricated by the 3D printing process using aluminum material, and it was confirmed that the dimensional accuracy was satisfied. The weight of the final product was reduced by 41% compared with the existing products. The results of this study will make it possible to develop an efficient product design process for 3D printing technology.

• Journal of the KSME
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• 제54권4호
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• pp.32-35
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• 2014

최근 3D 프린팅(3D printing) 기술은 기존의 산업적 응용을 넘어서 현재 제조업의 혁명을 가져올 차세대 기술로 주목받고 있다. 이 글에서는 국내외 3D 프린팅 기술 현황에 대한 개략적인 소개와 다양한 산업계에의 응용 사례에 대해 소개하고자 한다.

• Journal of the KSME
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• 제54권4호
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• pp.41-45
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• 2014

최근 3차원 프린팅 기술은 사회적으로 많은 관심을 받고 있으며, 공학교육의 효율성을 높일 수 있는 방안으로 거론되고 있다. 이 글에서는 공학교육에서의 3차원 프린팅 응용사례를 소개하며, 특히 CAD 과정과 종합설계 교과목의 사례에 대해 살펴보고자 한다.

• 프린팅코리아
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• 제13권3호
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• pp.120-123
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• 2014

디지털 기술의 발전은 커뮤니케이션과 그래픽 산업의 지속적인 변화를 요구하고 있다. 물론 이에 대응하려는 인쇄인의 노력도 전 세계적으로 끊임없이 이어지고 있다. 약간의 온도차는 있지만, 변화하는 패러다임 변화에 부응하려는 미국의 사례를 살펴봄으로써 우리의 대응방안을 가늠해 본다.

• Proceedings of the Korea Contents Association Conference
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• 한국콘텐츠학회 2017년도 춘계 종합학술대회 논문집
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• pp.5-6
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• 2017

본 연구는 소형 캐릭터의 다양한 관절운동을 선형제어를 통해 재현하기 위한 다관절 구조를 논의한다. 최소 동력원으로 복수 관절부를 제어하여 다양한 동세를 표현하기 위해 개별 관절구조를 설계하고 3D 프린팅을 통해 제작한다. 형상 변형 및 다자유도 확보를 위한 볼 조인트 형식을 적용하여 캐릭터의 다양한 운동성을 논의한다. 3D 프린팅 적용 시 구동 특성을 재현하기 위해 구조별 설계와 소재별 프린팅 운영 특성을 기술함으로써 효과적인 관절구조 설계와 3D 프린팅의 연계 방법을 찾고자한다.

• The Journal of the Acoustical Society of Korea
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• 제33권3호
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• pp.210-215
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• 2014

In spite of distortion caused by noise and echo, the audio fingerprinting technique must identify successfully an audio source. This audio fingerprinting technique is applying for TV commercial advertisement identification. In this paper, we propose a robust audio fingerprinting method for TV commercial advertisement identification. In the proposed method, a prominent audio peak pair fingerprint based on constant Q transform improves the accuracy of the audio fingerprinting system in real noisy environments. Experimental results confirm that the proposed method is quite robust than previous audio fingerprinting method in different noise conditions and achieves promising accurate results.

• Transactions of the Korean Society of Mechanical Engineers A
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• 제34권10호
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• pp.1537-1541
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• 2010

An inkjet printing system for printed electronics was developed. In this study, a printing algorithm was mainly discussed. In order to print a pattern image at a target location, we developed a hardware and software algorithm for determining the distances between a substrate camera and the selected nozzles. We implemented a vector-printing algorithm where AutoCAD dxf file was used for XY motion control and for printing. We also developed printing method using bitmap images. The technical issues in using CAD drawings and bitmap images were discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• 제17권10호
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• pp.319-330
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• 2016

Recently, 3D printing technology has been applied to make a concept model and working mockup of an industrial application. On the other hand, this technology has limited applications in industrial products due to the materials and reliability of the 3D printed product. In this study, the components of a full cord switch module are proposed as a case of a 3D printed component that can be used as a substitute for a short period. These are hub-driven and lever lockup components that have the structural characteristics of breaking down frequently in the emergency operating status. To ensure the structural strength for a substitute period, research of structure optimization was performed because 3D printing technology has a limitation in the materials used. After optimizing the structure variables of the hub-driven component, reasonable results can be drawn in that the safety factors of the left and right switching mode are 1.243 (${\Delta}153.67%$) and 3.156 (${\Delta}404.96%$). The lever lockup component has a structural weak point that can break down easily on the lockup-part because of a cantilever shape and bending moment. The rib structure was applied to decrease the deflection. In addition, optimization of the structural variables was performed, showing a safety factor of 7.52(${\Delta}26%$).

• Proceedings of the KIEE Conference
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.930_931
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• 2009

본 논문에서는 잉크젯 프린팅 기술을 이용하여 FPCB의 미세패턴 전극회로를 구현하였다. 이를 위하여 압전 잉크젯헤드에 의한 잉크드롭제어에 의해 전도성 잉크의 프린팅이 가능하도록 구현하였다. 그 동안 PCB 제작은 포토리소그라픽 공정에 의해 13단계 공정을 통하여 제작함으로써 폐수에 의한 환경오염, 비경제적인 비용, 긴 공정시간을 요구하였지만, 잉크젯 프린팅 기술을 적용함으로써 3단계로 공정간소화, 공정시간 단축, 비용절감의 효과를 얻을 수 있었다. 잉크젯 헤드는 당사에서 제작한 128노즐을 적용하였으며 이러한 결과 다음사양을 얻을 수 있었다. 인쇄 전극의 선폭 50um, 선폭 균일도 <15%, 패턴, 패턴 건조 큐어링 온도는 $150^{\circ}C$ 15분, 인쇄 속도 250mm/s, 720 dpi 분해능의 결과를 얻을 수 있었다.