• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2001년도 춘계학술대회 논문집
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• pp.235-238
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• 2001

Milli-structure components are classified as a component group whose size is between macro and micro scales, that is, about less than 20mm and larger than 1mm. The forming of these components has a typical phenomenon of bulk deformation with thin sheets because of the forming size. In this study, milli-structure rectangular cup drawing is analyzed and measured using the finite element method and experiment. Generally, milli-structure containers or cases like cellular phone vibrator consist of rectangular-shaped drawing to save installation space. A systematic approach is established for the design and the experiment of the forming processes for rectangular milli-structure cases. To verify the simulation results, the experimental investigations were also carried out on a real industrial product. The numerical analysis by FEM shows good agreement with the experimental results in view of the deformation shape of the product.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.1016-1020
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• 2001

The spinning is a very effective manufacturing technology for short production runs in a variety of sizes and shapes, because it can form the cross-section or tubular parts various shapes. However extensive experimental and analytical research has not been carried out. In this study, and fundamental experiment was conducted to improve productivity with process parameter such as tool path, angle of roller holder(a), feed rate(v) and corner radius of forming roller(Rr). These factors were selected as variables in the experiment because they were most likely expected to have and effect on spring back. The clearance was controlled in order to achieve the precision product which is comparable to deep drawing one. And also thickness and diameter distribution of a multistage cup obtained by shear spinning process were observed and compared with those of a commercial product produced by conventional deep drawing.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집A
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• pp.471-476
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• 2001

Milli-structure components ate classified as a component group whose size is between macro and micro scales, that is, about less than 20mm and larger than 1mm. The forming of these components has a typical phenomenon of bulk deformation with thin sheets because of the forming size. In this study, milli-structure rectangular cup drawing is analyzed and measured using the finite element method and experiment. Generally, milli-structure containers or cases like cellular phone vibrator consist of rectangular-shaped drawing to save installation space. A systematic approach is established for the design and the experiment of the forming processes for rectangular milli-structure cases. To verify the simulation results, the experimental investigations were also carried out on a real industrial product. The numerical analysis by FEM shows good agreement with the experimental results in view of the deformation shape of the product.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2000년도 추계학술대회 논문집
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• pp.105-108
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• 2000

Finite element analysis of a multi-stage deep drawing process is carried out for the die design of rectangular cup drawing with the large aspect ratio. Simulation is performed for thorough investigation of unfavorable mechanisms in the initial design. The analysis reveals that the difference of the drawing ratio and the irregular contact condition produces non-uniform metal flow to cause wrinkling and severe extension. In this paper, the modification guideline is proposed in the design of the process and the tool shape. The analysis result confirms that the modified design not only improves the quality of a deep-drawn product but also reduces the possibility of failure.

• 소성∙가공
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• 제10권2호
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• pp.144-150
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• 2001

Tool design is introduced in a multi-stage rectangular cup drawing process with the large aspect ratio. Finite element simulation is carried out to investigate deformation mechanisms with the initial tool design. The analysis reveals that the difference of the drawing ratio and the irregular contact condition produces non-uniform metal flow to cause wrinkling and severe extension. For remedy, the modification guideline is proposed in the design of the tool and process. Analysis results confirm that the modified tool design not only improves the quality of a deep-drawn product but also reduces the possibility of failure.

• 한국정밀공학회지
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• 제16권10호
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• pp.164-171
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• 1999

An optimum blank design technology is required for near-net of net-shape cold forming using sheets. Originally, the backward tracing scheme has been developed for preform design in bulk forming, and applied to several forming processes successfully. Its key concept is to trace backward from the final desirable configuration to an intermediate preform of initial blocker. A program for initial blank design in sheet forming which contains the capabilities of forward loading simulation by the finite element method and backward tracing simulation, has been developed and proved the effectiveness by applying to a square cup stamping process. In the blank design of square cup stamping, the backward tracing program can produce an optimum blank configuration which forms a sound net-shape cup product without machining after forming. Another general application appears in the blank design of a cup stamping with protruding flanges, one of typical automobile components. The blank configurations derived by backward tracing simulation have been confirmed by a series of loading simulations. The approach or decision of an initial blank configuration presented in this study will be a milestone in fields of sheet forming process design.

• International Journal of Costume and Fashion
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• 제3권
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• pp.51-87
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• 2003

This study aims primarily to discuss the question 'What does the red fashion boom in Korean society during the 2002 World Cup mean\ulcorner' For this question, it describes fashion phenomena and characteristics that appeared during the time. Specifically, in order to understand the concrete essence of the red fashion boom in terms of clothing and textiles, this study classifies and describes the red fashion boom as 'object, process and symbol' concepts. It investigates each case within the context of fashion. Outside that context, then, the implications of the red fashion boom are examined based on cultural studies and other sociocultural perspectives. This question is considered by focusing on social pressures as ideology, looking at the voluntary behaviour of Korean people in this context and examining several other factors. This is an investigation of the relationship between fashion, society and culture pursuing fashion theory by reviewing the relevant theoretical backgrounds afforded by the humanities and the social sciences. Based upon the above theoretical discussions, it synthesises what factors contributed to the Korean red fashion boom. Finally, this study briefly states their applicability to cultural marketing in its practical aspects. This study has attempted to throw some light on the question 'What does the red fashion boom in Korean society during the 2002 World Cup mean\ulcorner' The Korean Red Fashion Boom emerged from its interrelation with each context of the World Cup, as in the dualism of 'Janus'. That is, the World Cup functioned as the positive face of a festival that collected deep emotions and passion and contributed to the integration of society. Whereas its negative face, ideologically speaking, personified the invisible capitalistic product produced by the nation, enterprises and the mass media. And the implications of the red fashion boom can be interpreted with reference to the two faced World Cup.

• 한국기계가공학회지
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• 제15권6호
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• pp.1-8
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• 2016

As demand for paper cups markedly increases, this has brought about a requirement to develop fast paper cup forming machines. However, the fast manufacturing speed of these machines causes faults to occur more frequently in the final product. To reduce the possibility of producing faulty products, it is necessary to develop technologies to monitor the manufacturing process and diagnose the machine status. In this research, we selected the main driving axis of the forming machine for fault diagnosis. We searched the states of rotational elements related to the driving axis and suggested a fault diagnostic system based on spectrum analysis consisting of a real-time data acquisition device, accelerometers, and a diagnosis algorithm. To evaluate the developed fault diagnostic system, we performed experiments using a test station which resembles the actual paper cup forming machine. As a result, we were able to confirm that the proposed system was sufficiently feasible to diagnose any abnormalities in the operation of the paper cup forming machine.

• 한국콘텐츠학회논문지
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• 제14권3호
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• pp.151-165
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• 2014

우리나라의 전통주는 막걸리 붐 이후 주춤한 발전을 보이고 있으며, 이에 따라 전통주의 특성을 반영한 술잔을 활용한 명품화 및 세계화 전략을 통한 도약이 필요한 시점이다. 현재까지 우리나라의 전통주 술잔 디자인 개발은 심미성 및 유통 편의성에만 초점을 맞추거나, 디자인 개발의 세분화 고급화 연구화 등의 일시적 발전양상을 보여오긴 하였으나, 전통주의 특성을 기획 단계부터 반영하여 상품화한 사례나 프로세스는 없었다. 따라서 전통주의 특성을 반영한 술잔 디자인 설계 프로세스 기술 수립하는 것이 필요한 상황이다. 본 연구는 전통주의 특성을 감성요소인 오감과 스토리텔링으로 나누어 분석하고, 이들 중 술잔 디자인에 필요한 요소들을 추출하고, 이를 기반으로 전통주 술잔의 형태 소재 같은 시각화하는 관계를 파악하고자 하였다. 이러한 요소 중, 특히 대상 전통주가 갖고 있는 역사나 설화와 같은 스토리텔링을 기반으로 한 술잔의 라벨, 문양, 장식적 요소 등 디자인을 결정하여 해당 전통주의 상품성을 극대화할 수 있는 요소들을 도출할 수 있었다. 이러한 연구결과는 기존 소규모 가양주의 수출이 주춤하고 있는 상황에서 감성요소와 스토리텔링이 있는 전통주의 특성을 살려 경쟁력 있는 술잔 디자인을 개발함으로써 새로운 수출전략을 제공할 수 있을 것으로 기대된다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.213-215
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• 2022

최근 이미지를 처리하는 딥러닝 기술이 화재 감지나 자율주행, 불량품 검출 등에서 다양하게 활용되고 있다. 특히, 제품이 오염되었는지 아닌지를 파악하기 위해 기존 센서 데이터에서 넘어온 오염물질을 통해 파악할 수 있지만, 제품의 균열이나 오염물질 자체를 이미지로 인식하는 기술도 다양한 분야에서 활발히 연구되고 있다. 본 논문에서는 오염되지 않은 정상적인 컵과 오염된 컵을 이미지를 통해 분류하는 시스템을 설계하고 이를 구현하였다. 이미지는 오픈 이미지와 촬영한 이미지를 사용하였고, 3D 객체 인식을 위한 Google Objectron을 활용해 컵 이미지의 상단 부분을 추출하여 이미지를 분석하였다. 본 연구를 통해 위생 분야에서 필요한 제품의 오염도를 이미지 기반으로 추출할 수 있는 연구에 다각도로 활용할 것으로 사료된다.