• 한국기계가공학회지
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• 제14권4호
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• pp.146-150
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• 2015

Steel is produced through the steel-making process with a desired shape by a rolling press. Scrap is removed according to the sheet edge to improve the quality of the product. This machine is called a side trimmer. This study aimed to develop a side trimmer for automatically changing the width of the trimming knife without line stopping. This machine consists of a housing opening device and a turning device. The measuring technologies of sheet width, trimming knife rotation angle, and knife gap for increasing the control accuracy. This experiment was conducted to evaluate the performance of the developed technologies. It was reduced by 10% compared with the operation time of the conventional method.

• 소성∙가공
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• 제15권3호
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• pp.226-231
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• 2006

The fuel injector is a pa.1 that controls the fuel supply of automotive engine. The housing of the fuel injector supports the rod, the needle valve and the solenoid. In this study, the rigid-plastic FE-analysis by using the design of experiments (DOE) and the response surface methodology (RSM) has been performed to produce the product reducing the under-fill and the maximum effective strain. From the results of DOE, the stem of counter punch and the face angle of punch at the $1^{st}$ process, and the stem of punch at the $2^{nd}$ process were determined as the significant design variables far each response such as the upper under-fill, lower under-fill and the maximum effective strain. From the results of RSM, the optimal values of the design variables have been also determined by simultaneously considering the responses.

• 한국전기전자재료학회논문지
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• 제22권2호
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• pp.178-183
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• 2009

This paper introduces experimental investigates of an accident pattern for the distributing cross linking-polyethylene(XLPE) cable terminations considering product liability(PL) law environment. The influence of defects such as thickness and length decrease of XLPE, an impurity on XLPE and the gap between stress-con of housing and semi-conductor on insulating properties of the termination have been studied. The thickness and length decrease of XLPE decrease ac breakdown strengths. Breakdown traces of XLPE that is damaged by knife displayed ellipse shape. The gap of between stress-con and semiconductor deteriorates dielectric strength of XLPE seriously.

• Current Applied Physics
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• 제18권11호
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• pp.1451-1457
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• 2018

Injection compression molding (ICM) is an advantageous processing method for producing thin and large polymeric parts in a robust manner. In the current study, we employed the ICM process for an energy-related application, i.e., thin and large polymeric battery case. A mold for manufacturing the battery case was fabricated using injection molding. The filling behavior of molten polymer in the mold cavity was investigated experimentally. To provide an in-depth understanding of the ICM process, ICM and normal injection molding processes were compared numerically. It was found that the ICM had a relatively low filling pressure, which resulted in reduced shrinkage and warpage of the final products. Effect of the parting line gap on the ICM characteristics, such as filling pressure, clamping force, filling time, volumetric shrinkage, and warpage, was analyzed via numerical simulation. The smaller gap in the ICM parting line led to the better dimensional stability in the finished product. The ICM sample using a 0.1 mm gap showed a 76% reduction in the dimensional deflection compared with the normal injection molded part.

• 한국의류산업학회지
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• 제19권6호
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• pp.712-722
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• 2017

Attention to appearance is a common concern for all. Images created by appearance play an important role in judging people in terms of social life in contemporary society. This study investigated general behaviours of appearance management behaviours of both male and female college students, and categorised consumption emotion experienced by appearance management. In this regards, it was examined how consumers' psychological mechanism of consumption emotions influences consumers' satisfaction and their behavioural intentions. The main results are as follows: First, female students invest more time and money into appearance management compare to male students and have a higher level of attention. Secondly, both male and female students experience a variety of consumption emotions in appearance management behaviours. According to gender, female students show a higher level of positive and negative consumption emotions than male students. Thirdly, there are five emotional types (Confidence, Annoyance, Refreshment, Enjoyment, Anxiety) as the result of the consumption emotional typology in terms of appearance management behaviours of male and female university students. Fourthly, there are different emotional groups which influence consumers' satisfaction or behavioural intention according to gender in appearance management behaviour. In general, emotional groups such as 'Confidence, Delight and Anxiety' have a positive influence on consumers' satisfaction and behavioral intention, and 'Annoyance' composed of negative emotions have negative influence. In this respect, this research can contribute to beauty product development and marketing strategy with reflecting consumption emotion, and better understanding of consumption culture of university students which plays a pivotal role in appearance management behavior.

• 한국가구학회지
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• 제26권1호
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• pp.77-91
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• 2015

The appeal of sauna is caused by the fact that through that, one can feel Korea's unique temperament and culture; however, because of its being a public facility and flooding of businesses due to excessive supplies of various additional features such as washing, playing, eating, sleeping and health care functions, issues of social resources and environment come to the fore, so it has reached a situation of red ocean that it is difficult to enter the market anymore. Taking these into account, this study focused on developing a thermal technology and design of the housing of an environment-friendly mobile home sauna, making the most use of the sauna's fundamental purpose and settling it as a tourist product, analyzing the marketing research on the existing sauna and considering the recent housing trends and lifestyles for a new concept sauna. Thus, regarding its characteristics and utilization, it was designed smaller than $10m^2$ (3 pyeong) so that it would be easy to install in any space and convenient to move. It can be installed in separate buildings and rest spaces such as country houses, resorts, pensions, camping grounds as well as outdoor houses, custom produced for a measure of pyeong that customers want so as to match up with the Enforcement Ordinance of the Agricultural Land Act in a concept of the farmer's hut and kitchen, bathroom and bathroom can be installed inside according to an option. In addition, regarding its efficacy, in order to give environment-friendly healing effects, materials such as Hinoki Cypress, red clay and hardwood charcoal were used, a fixed indoor temperature of $70{\sim}100^{\circ}C$ was maintained by heating methods such as electromagnetic wave free, energy saving and low-power boiler, and it was made to have excellent effects on fatigue recovery, relieving stress, skin care and diet through far-infrared emission.

• 한국건설관리학회논문집
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• 제6권4호
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• pp.113-121
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• 2005

프로젝트의 일정 네트워크는 선-후행 관계로 정의된 액티비티들로 구성되어있다. 액티비티를 완료하는데 소요되는 기간은 현재 주택시장은 시장경제 체제 하에서의 수요자 중심으로 시장이 변화되어가고 동시에 예측할 수 없는 경기 변동의 증대가 이어지고 있다 주택 보급률은 3002년에 벌써 $100\%$를 도달 하였으며 출생률은 계속하여 감소하는 추세에 있다. 이러한 악 조건 속에서 주택 건설업체들이 앞으로 신규고객을확보하고 이윤을 창출하기 위하여 더 이상 새로운 시장을 개척해 나가기 보다는 기존의 고객을 관리함으로써 계속해서 자사의 제품을 이용 할 수 있도록 하는 것이 올바른 방향일 것이다. 이에 본 연구에서는 주택건설업 부문에서의 CRM(고객관계관리) 적용방향을 모델하우스를 중심으로 현시점의 문제점을 제시하고 앞으로 후분양제도의 도입에 맞추어 모델하우스에서의 CRM을 대체할 수 있는 방법을 제안 하고자 한다.

• 한국건축시공학회지
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• 제10권1호
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• pp.49-56
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• 2010

건설산업은 타 산업분야에 비하여 체계화되지 못하고 경험 또는 관습에 의한 의사결정이 이루어지는 경우가 빈번하여 생산성 향상이 적극적으로 이루어지지 못하고 있는 실정이다. 특히, 대단위의 건설생산이 이루어지고 있는 공동주택의 공사에서 생산성 향상을 위한 과학적이고 분석적인 연구가 수행될 경우 그 파급효과가 대단히 클 것으로 기대된다. 따라서 본 논문에서는 공사원가에 가장 큰 영향을 미치는 공동주택 골조공사 중 주요공종인 거푸집공사의 효율적인 생산성 향상을 위한 공법개선안을 제시하고자 생산성 측정기법으로 워크샘플링을 활용하였다. 기존 거푸집공사에 대하여 작업절차를 분석하고, 각각의 작업별로 생산성을 분석하였다. 기존 작업법에서 분석된 문제점을 기반으로 개선방안을 제안하였다.

• 한국융합학회논문지
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• 제3권4호
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• pp.29-34
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• 2012

자동차는 2만 여개가 넘는 부품들로 구성되어 있다. 또한, 새시와 함께 자동차 내부에는 조향장치, 파워장치, 도어 록 장치 등 많은 전기 전자 및 센서들이 부가되어 수송 외 운전자가 주행 중 운전을 용이하게 수행할 수 있는 여러 가지 장치들이 별도로 차체내부 혹은 외부에 부착되어 있다. 그 가운데 자동차의 도어 유리 부위는 제작 초기에는 운전자가 직접 휠을 회전시켜 유리문을 상하로 개폐하였으나 최근 들어 모터, 센서, 스위치 류 등의 발달로 버튼하나로 문을 상하로 개폐시키는 방법을 사용하게 되었다. 유리문을 상하로 개폐시키는 조립부위를 자동차에서는 power window motor assembly라고 이를 개발하는 것이 본 연구의 목적이다. 현재는 anti-pinch type power window motor에 ECU(Electronic Control Unit) system이 국내에서 개발되지 못하고 있다. 뿐만 아니라, 이 연구에서는 CAE 해석과 개발을 통해 anti-pinch power motor gear housing 및 cylindrical gear를 국산화 개발하고 ECU 일체형 적용을 함으로 인해 조립공정의 단순화 및 원가절감에 기여하고자 한다.

• 에너지공학
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• 제24권1호
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• pp.88-96
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• 2015

기어펌프는 단순한 구조를 가지면서도 신뢰성이 높고 작동과 유지가 쉽기 때문에 수력학 장치에 널리 사용된다. 일반적으로 기어펌프는 질량유량과 효율을 고려한 다양한 변수에 의해 설계된다. 본 연구에서는 기어펌프의 최적화 설계를 위해 ANSYS v15.0 CFX 상용프로그램을 사용한 3차원 유동해석을 실시하고 해석결과로부터 설계변수를 선정하도록 하였다. 즉, 기어펌프의 다양한 회전 속도 및 기어 끝단과 하우징 사이의 간극에 대한 질량유량 및 효율을 검토하였으며, 해석 결과로서, 회전 속도가 증가할수록 평균 질량유량 및 효율은 증가하였고, 기어펌프와 하우징의 간격이 증가할수록 평균 질량유량 및 효율은 감소하였다.