• Title/Summary/Keyword: Drawing analysis

검색결과 1,539건 처리시간 0.026초

A Study on the Applying CAD of Springback Revision Value by Design Analysis (설계해석에 의한 SPRINGBACK 보정값 CAD 적용에 관한 연구)

  • Lee J. M.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 한국소성가공학회 2005년도 추계학술대회 논문집
    • /
    • pp.312-317
    • /
    • 2005
  • In this study, using the stamping, analysis program, PAM STAMP, applied to the drawing result of springback analysis and draw analysis with applying on the best design planning as many times simulations from the initial stage of the die developing of automotive panels. Especially, after inspecting the design method with stamping analysis and springback analysis, write about the die development examples, using CADCEUS which is the software revising the amount of springback.

  • PDF

Current Source Disposition of Large-scale Network with Loop-reduction Drawing Technique (망축소작도법에 의한 대형회로망 전류원 처리)

  • Hwang, Jae-Ho
    • The Transactions of the Korean Institute of Electrical Engineers D
    • /
    • 제49권5호
    • /
    • pp.278-286
    • /
    • 2000
  • A new large-scale network geometric analysis is introduced. For a large-scale circuit, it must be analyzed with a geometric diagram and figure. So many equations are induced from a geometric loop-node diagram. The results are arranged into a simple matrix, of course. In case of constructing a network diagram, it is not easy to handle voltage and current sources together. Geometric loop analysis is related to voltage sources, and node analysis is to current sources. The reciprocal transfer is possible only to have series or parallel impedance. If not having this impedance, in order to obtain equivalent circuit, many equations must be derived. In this paper a loop-reduction method is proposed. With this method current source branch is included into the other branch, and disappears in circuit diagram. So the number of independent circuit equations are reduced as much as that of current sources. The number is not (b-n+1), but (b-n+1-p). Where p is the number of current sources. The reduction procedure is verified with a geometric principle and circuit theory. A resultant matrix can be constructed directly from this diagram structure, not deriving circuit equations. We will obtain the last results with the help of a computer.

  • PDF

A Study on the Architectural Design Method for ]Remodeling Vitalization of Apartment Rouses - Based on the Systematization of Emotion-Information for Multi-Dimensional Module Composition of the Unit household - (공동주택 리모델링 활성화를 위한 건축설계 기법에 관한 연구 - 단위세대 다차원모듈 구성을 위한 감성정보 체계화를 중심으로 -)

  • Jung Moo-Woong;Lee Chan-Yong
    • Journal of the Korean housing association
    • /
    • 제16권4호
    • /
    • pp.121-129
    • /
    • 2005
  • The major goal of this study is drawing design plan factors considering residents' life cycle and life style when remodeling design is needed. By drawing such design factors, the study will propose an alternative remodeling design plan. Such design method was defined as Multi-Dimensional module design method. And constructing data-system based on Multi-Dimensional module was secondary goal in this study. The details are as follows: Based on analysis of Residents' demand for remodeling and features of emotion-design applied to remodeling, the system which is suitable for application in remodeling design method was conducted. Based on the type of construction materials, the level value was set up according to emotion-factor application. Also, by conducting coding operation according to the distinction of construction materials, this study seeks the unit drawing method of information for constructing emotion-information system.

A Study on the Method for Multi-dimensional Module Plan of Apartment Houses for Remodeling - Based on the systematization of Emotion-Information for Multi-Dimensional Module Composition of the Unit household (공동 주택 리모델링 다차원모듈 설계 기법에 관한 연구 - 단위세대 다차원모듈 구성을 위한 감성정보 체계화를 중심으로 -)

  • Lee, Chan-Yong;Kwon, Sung-Sun
    • Journal of The Korean Digital Architecture Interior Association
    • /
    • 제5권1호
    • /
    • pp.1-8
    • /
    • 2005
  • The major goal of this study is drawing design plan factors considering residents' life cycle and life style when remodeling design is needed. By drawing such design factors, the study will propose an alternative remodeling design plan. Such design method was defined as Multi-Dimensional module design method. And constructing data-system based on Multi-Dimensional module was secondary goal in this study. The details are as follows: Based on analysis of Residents' demand for remodeling and features of emotion-design applied to remodeling, the system which is suitable for application in remodeling design method was conducted. Based on the type of construction materials, the level value was set up according to emotion-factor application. Also, by conducting coding operation according to the distinction of construction materials, this study seeks the unit drawing method of information for constructing emotion-information system.

  • PDF

Analysis the Design Attribution to Assess the Design Quality Based on Detailed Design (실시설계도면 기반 설계속성 도출 및 설계품질평가)

  • Yang, Ji Su;Kim, Yea Sang
    • Korean Journal of Construction Engineering and Management
    • /
    • 제17권3호
    • /
    • pp.3-12
    • /
    • 2016
  • Recently, construction industry shows active expansion in overseas construction market. But the active work limited in construction work, on the other hand, design-drawing work is evaluated shortage of competitive power. So this study aim to improve the competitive of 'domestic design-drawing work'thorough objective evaluation. Objective evaluation is consist of 'design attribution'. Design attribution is based on the execution drawing and complement by existing reasearch, expert interview. And then, list up the 'design attribution' evaluation list to carry out a survey targeting hands-on worker. Survey is consist of 'Likert 5-point scale, FMEA method'. As a result, construction company and design company show different opinions in both relative position evaluation and importance evaluation.

COMPUTATIONAL ANALYSIS ON THE COOLING PERFORMANCE OF GLASS FIBER COOLING UNIT WITH HELIUM GAS INJECTION (헬륨가스 주입식 유리섬유 냉각장치의 냉각성능 해석)

  • Oh, I.S.;Kim, D.;Umarov, A.;Kwak, H.S.;Kim, K.
    • Journal of computational fluids engineering
    • /
    • 제16권4호
    • /
    • pp.110-115
    • /
    • 2011
  • A modern optical fiber manufacturing process requires the sufficient cooling of glass fibers freshly drawn from the heated and softened silica preform in the furnace, since the inadequately cooled glass fibers are known to cause improper polymer resin coating on the fiber surface and to adversely affect the product quality of optical fibers. In order to greatly enhance the fiber cooling effectiveness at increasingly high fiber drawing speed, it is necessary to use a dedicated glass fiber cooling unit with helium gas injection between glass fiber drawing and coating processes. The present numerical study features a series of three-dimensional flow and heat transfer computations on the cooling gas and the fast moving glass fiber to analyze the cooling performance of glass fiber cooling unit, in which the helium is supplied through the discretely located rectangular injection holes. The air entrainment into the cooling unit at the fiber inlet is also included in the computational model and it is found to be critical in determining the helium purity in the cooling gas and the cooling effectiveness on glass fiber. The effects of fiber drawing speed and helium injection rate on the helium purity decrease by air entrainment and the glass fiber cooling are also investigated and discussed.

Improvement of Dimensional Accuracy for a Solenoid Valve Case for an 8-Speed Automatic Transmission by Using Multistage Drawing (프로그레시브 공정을 이용한 8단 자동변속기용 솔레노이드 밸브케이스 치수정밀도 향상)

  • Kim, T.H.;Bae, W.B.;Bae, J.H.;Kim, C.
    • Transactions of Materials Processing
    • /
    • 제22권8호
    • /
    • pp.442-449
    • /
    • 2013
  • The solenoid valve case of an 8-speed automatic transmission plays a role in maintaining the valve seal, which prevents an inflow of foreign substances into the transmission. The seal increases the reliability of the automatic transmission's performance. As a solution to pollution-related problems and to reduce fuel consumption, transmissions are being made with more gears to work more economically and have reduced fuel consumption. These newer transmission require greater dimensional tolerances and need to be manufactured with more precision. In the current study, the design of a multistage drawing considering both the product's height and limit draw ratio (LDR) of the material was performed using both a theoretical analysis and the expertise of industrial experts. The finite element modeling (FEM) simulation was performed using the commercial software, PAM-stamp, and tests of the dimensional measurements for a prototype were performed to verify the optimal progressive process.

Analysis on the Uses of the External Representations in the $3{\sim}6th$ Grade Science Textbooks Developed Under the 7th National Curriculum (제7차 초등학교 $3{\sim}6$학년 과학 교과서에 제시된 외적 표상들의 활용 실태 분석)

  • Kang, Hun-Sik;Yoon, Ji-Hyun;Lee, Dae-Hyung
    • Journal of Korean Elementary Science Education
    • /
    • 제27권2호
    • /
    • pp.158-169
    • /
    • 2008
  • The purpose of this study was to analyze the uses of the external representations in the $3{\sim}6th$ grade science textbooks developed under the 7th National Curriculum on the basis of the theories and the research results on learning with the multiple representations. The results showed that the frequencies of the macroscopic external representations were higher than those of the symbolic external representations. The external representations with drawing and/or writing, especially writing, were used more frequently than those without drawing and/or writing. However, the most of the external representations were rarely used according to the principles and/or the theories (e.g., personalization principle, dual coding theory, cognitive load theory, and social constructivism theory) for effective uses of the multiple external representations in the science textbooks. The present study provides the guideline to establish the effective uses of the external representations in the science textbooks that not only meet learners but also teachers.

  • PDF

Finite element analysis considering heat transfer in sheet metal forming of AZ31 (AZ31 합금 성형에서의 열전달을 고려한 유한요소해석)

  • Kim M. C.;Lee Y. S.;Kwon Y. N.;Lee J. H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 한국소성가공학회 2005년도 춘계학술대회 논문집
    • /
    • pp.73-77
    • /
    • 2005
  • In this work, the influences of tool temperature on the formability of AZ31 sheet material in warm deep drawing processes of square cup were investigated. Deep drawing tests under different tool temperatures for magnesium alloy sheet at elevated temperature $250^{\circ}C$, where AZ31 sheet shows a good formability, and FE analyses were carried out. The successfully formed part without any defects was obtained when temperature of tool was over $100^{\circ}C$ while the fracture was occurred at the corner of the square cup below $100^{\circ}C$. It is shown that lower temperature of tool than that of magnesium sheet causes the temperature drop of the material by heat transfer and thus Interrupts the dynamic recrystallization of it. Therefore, in order to obtain successful part of magnesium alloys, it is necessary that the tool temperature is limited to the same or slightly lower temperature than sheet material.

  • PDF