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Hole-Pin-Slot 조립의 공차해석 알고리즘 기초 연구
박준일(Junil Park),최유현(Youhyun Choi),박현풍(Hyunpung Park),임현준(Hyunjune Yim) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.동계
Mechanical assembly using pins, slots and holes is perhaps the most widely used method in many applications. As the value of dimensional engineering increases in most manufacturing industry, tolerance analysis has been drawing attention from design and production engineers. In order to gain an insight into such assembly processes, simulation algorithms have been developed in this study, with the effects of floating pins. This paper presents simulation results, obtained using the developed algorithms, for two simple problems: 2 pin-2 hole assembly and 2 pin-1 hole-1 slot assembly. By reviewing the simulation results, the feasibility and usefulness of the developed algorithms have been confirmed. Further future study to consider various, more complex cases will help develop our insight into the problem of mechanical hole-pin-slot assembly process.
왕한겸,박준일,최재현,Wang, Hankyeom,Park, Junil,Choi, Jaehyun 한국건설관리학회 2018 건설관리 : 한국건설관리학회 학회지 Vol.19 No.4
건설 산업에서의 클레임은 프로젝트 수익성에 심각한 영향을 미칠 수 있으며 적절한 예방 조치를 취하지 않으면 프로젝트의 실패를 야기할 수 있다. 프로젝트 실행 과정에서 잠재적인 클레임 및 분쟁을 적절하게 예방하고 대응하기 위해서는 체계적이고 지속적인 정보의 축적과 주요 작업에 대한 역할 및 책임에 대한 명확한 정의가 필요하다. 이러한 필요성을 바탕으로 본 연구는 건설프로젝트 정보관리시스템(PMIS)을 개발하고 검증한다. 개발된 시스템은 일정, 비용, PM/CM, 설계, 협업, 클레임과 같은 관리 모듈이 포함되며 개발된 시스템을 검증하기 위해 실제 프로젝트 사례에 적용하였다. 적용 결과는 건축 클레임에 특화된 정보시스템이 더욱 사용자의 친숙도를 고려하여 개발되어야 함과 발주자와 계약자 모두가 정보관리시스템을 사용할 때 더욱 효과적이라는 것을 보여준다. Claims in the construction industry can have a serious impact on the profitability of the project or can even result in project failure if it fails to take appropriate prevention. In order to properly prevent and respond to the potential claims and legal disputes throughout the project execution, it is necessary to continuously accumulate informations and clearly define the roles and responsibilities of the important activities systematically. Based on these needs, this study develops and verifies the project information management system(PMIS) that can prevent and respond possible claims for construction projects. Developed system includes such management modules as schedule, cost, PM/CM, design, collaboration, and claims. The system was validated by adopting it to the practical projects. The results showed that information systems tailored to the construction claim need to elevate users' familiarity to be more useful. Besides, the system can be more functional when used by both owners and contractors.
공차해석을 위한 조립공정 시뮬레이션 알고리즘의 연구 및 사례
안호재(Hojae Ahn),최유현(Youhyun Choi),박준일(Junil Park),박현풍(Hyunpung Park),임현준(Hyunjune Yim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
As the customers’ expectation level for product quality rises, careful tolerance design gains increasing importance. Successful tolerance design still requires iterative runs of tolerance analyses. Therefore, accurate tolerance analysis or simulation is crucial for enhanced product quality. This paper outlines fundamental algorithms that consist of assembly simulation for tolerance analysis, which includes those for 3-2-1 assembly, axial move, and various types of pattern move. These algorithms have been verified and validated for many basic problems, and some simple cases are illustrated in this paper. Utilizing such algorithms for accurate tolerance analyses will lead to improved product quality in the future.
박준일,장영태,김경훈 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-
An urban or urbanizing watershed is one in which impervious surfaces cover or will soon cover a considerable area. Impervious surfaces include roads, sidewalks, parking lots, and buildings. Natural flow paths in the watershed may be replaced or supplemented by paved gutters, storm sewers, or other elements of artificial drainage. Urbanization changes a watershed's response to precipitation. Therefore it is required that designing the hydraulic structures in a rational manner in due consideration of urbanization to prevent flood damage. The purpose of this study is to determine the advanced rainfall intensity- duration- frequency relationship by the use of contour of geographical distribution of constants for the Gyeongnam area. Data are available on a hourly basis for the 11 raingauges for a period of 3, 5, 10, 20, 30, 50, 100, 200, 300, 500, 1000 years. In practice, advanced IDF curves will be offered an important basis data to obtain rainfall depth of specific durations at any place in the Gyeongnam area.
박준일,김기흥,김경훈,김중완 慶尙大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.11 No.-
A rainfall distribution is very complicates owing to topographic influence in Korea. Hence, the variations in the distribution of monthly rainfall are required precise analysis in order to predict a flood control and to secure a sufficient capacity of water. In this study, time series of 68 rain gage stations over Gyeongnam area are examined for a 35-year secular period(l960 ~1994) and the extent and nature of changes, such as fluctuations, trend and persistence, are investigated. The trend analysis of regional rainfall practised a tendency towards annual rainfall and seasonal rainfall totals in all regions divided into three regions ; namely, based on theNakdong river basin. Region I(mountainous region), Region II(Middle plain region). Region III(downstream region), the periodicity is examined by the power spectrum analysis.
신형우,유재성,박준일,이종규 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-
A rainfall distribution is very complicates owing to topograpic influence in Korea. Hence, the variations in the distribution of monthly rainfall are required precise analysis in order to predict a flood control and to secure a sufficient capacity of water. In this study, time series of 47 rain gage station over Chonnam area examined for a 15-year secular period(1981~1995) and the extent and nature of changes, such as fluctuation, trend and persistence, are investigated. The trend analysis of regional rainfall practised a tendency towards annual rainfall and seasonal rainfall totals in all regions ; namely, based on the mean annual precipitation. Region Ⅰ(Western region), Region Ⅱ (Southern region), Region Ⅲ ( Eastern region), the periodicity is examined by the power spectrum analysis.
김경훈,이종규,박준일,유재성 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-
A rainfall distribution is very complicates owing to topograpic influence in Korea. Hence, the variations in the distribution of monthly rainfall are required precise analysis in order to predict a flood control and to secure a sufficient capacity of water. In this study, time series of 50 rain gage stations over Gyeongnam area examined for a 35-year secular period( 1960 ~ 1994) and the extent and nature of changes, such as fluctuation, trend and persistence, are investigated. The trend analysis of regional rainfall practised a tendency towards annual rainfall and seasonal rainfall in all regions ; namely, based on the annual mean precipitation. Region Ⅰ (Northern region), Region Ⅱ (Central region), Region Ⅲ(Southern Coastal region), the periodicity is examined by the power spectrum analysis.