• Title/Summary/Keyword: Electronic Drawing

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Design of Intermediate Die for Spline Drawing (스플라인형상 인발을 위한 중간패스 단면형상 설계)

  • Lee, T.K.;Lee, J.E.;Lee, S.K.;Kim, B.M.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2008.10a
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    • pp.337-340
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    • 2008
  • The cross section shape of intermediate die is one of important parameters to obtain dimensional accuracy of final product in shaped drawing process. Until now it has been designed by the experience or trial and error of the expert. In this study, the cross section shape of intermediate die fur spline shape is determined by the electronic field analysis, shape factor method. The result of the electronic field analysis, shape factor method has been compared with that of the present method. The effects of cross section shape on the dimensional accuracy were investigated by using FE analysis. And then the multi-stage shaped drawing experiments were performed to verify the results of FE analysis. As a result, the cross section shape from the electronic field analysis had the good dimensional accuracy. The electronic field analysis can be used for the method to obtain the cross section shape of intermediate die in shaped drawing process.

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The Influence of Drawing Parameters on Sausaging and Critical Current of Bi-2223/Ag HTS Wires. (Bi-2223/Ag 고온 초전도 선재의 임계전류 및 소세징에 미치는 인발 조건의 영향)

  • 하홍수;오상수;하동우;김상철;권영길;류강식
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.11a
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    • pp.488-491
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    • 2000
  • Bi-2223/Ag superconducting wires have been mainly prepared by a powder-in-tube method. The drawing and the rolling are main processes to increase the core density and wire length. In the fabrication of long wire, especially, the drawing should be precisely controlled to assure the filament homogeneity. In this paper, the influences of drawing die angle, bearing length and reduction ratio on the sausaging and the critical current density of the wire are investigated. Single cored and multi-filamentary wires are fabricated by PIT method with different conditions. The core densities and sausaging in the wires are investigated and are discussed regarding their relationship to the I$_{c}$. It was made clear that the geometry of drawing die is sensitively dependent on the sausaging. The improvement of I$_{c}$ was achieved by reducing the die angle and high core density.ity.

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The Development of the Drawing Information Management System Based on Concurrent Engineering (동시공학적인 도면정보관리시스템 개발)

  • Moon, Hee-Sok;Kim, Sunn-Ho;Shin, Yong-Ha
    • IE interfaces
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    • v.9 no.1
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    • pp.41-52
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    • 1996
  • As part of effort to reduce the process time from design to manufacture and delivery, the concept of CE(concurrent engineering) has been applied to design process. In this research, the drawing information management system (DIMS) was developed based on CE. The system can distribute electronic documents of drawing or work instruction parallel to all reviewers simultaneously and collect their annotations through network. Mark-up functions are used for annotations on the electronic documents. DIMS is a system which integrates drawing management, engineering BOM, CAD and raster drawings, etc. In this system, a SUN workstation is interfaced with PCs by LAN. CIMCAD-2D, Image Hunter, and ORACLE RDBMS are used for CAD drawings, raster drawings, and drawing information management, respectively. As an integration tool for all the information, LINKAGE is adopted.

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Investigation into the development of deep drawing tools with small size for electronic parts utilizing the CAE and RP/RT technology (CAE 와 쾌속조형/쾌속툴링을 이용한 전자제품용 소형 금형의 개발에 관한 연구)

  • Ahn D.G.;Lee S.H.;Kim M.S.;Han G.Y.;Kim J.S.;Moon H.S.;Yoon Y.S.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.334-337
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    • 2005
  • The objective of this research works is to propose a rapid development methodology of small size deep drawing tools for electronic parts utilizing the technology combination of CAE and RP/RT. The technology is applied to the development of deep drawing tools with a drain shape. The final surface of tools is obtained from the evaluation of the formability using the CAE. In order to manufacture the physical prototype of tools fer try-out terming, several fabrication experiments are carried out for three types of rapid tool manufacturing technology. Through the fabrication experiments, the acceptable rapid manufacturing technologies of deep drawing tools with a small size have been proposed.

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Study for multi-filament drawing of Bi2223 high-temperature superconductivity wire by FE method (유한요소법에 의한 Bi2223 고온 초전도 선재의 다심 인발에 대한 연구)

  • 박동인;김병민;오상수
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2003.10a
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    • pp.273-276
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    • 2003
  • High-temperature superconduction materials(Bi2223) possess electrical/electronic and magnetic properties. Because high-temperature superconduction materials is a ceramic powder, that can not be produced singlehandedly. So Ag sheathed Bi-2223 wire was produced by drawing process using powder-in-tube(PIT) method. This superconductor has many difficulties to produce. The main difficulty is that the mechanical properties of the ceramic powder are very different from those of the Ag sheath. Bi2223 high-temperature superconductivity have a single filament drawing process, and multi-filament drawing process. This study analysed multi-filament drawing process by FEM, a defects during multi-filament drawing was studied by FEM.

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A Study on Multi-Filament Drawing of Bi2223 High-Temperature Superconductivity Wire by FE Method (유한요소법에 의한 Bi2223 고온 초전도 선재의 다심 인발에 대한 연구)

  • 박동인;김병민;오상수
    • Transactions of Materials Processing
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    • v.13 no.1
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    • pp.78-83
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    • 2004
  • High-temperature superconduction materials(Bi2223) possess electrical/electronic and magnetic properties. Because high-temperature superconduction materials is a ceramic powder, that cannot be produced singlehandedly. So Ag sheathed Bi-2223 wire was produced by drawing process using powder-in-tube(PIT) method. This superconductor has many difficulties to produce. The main difficulty is that the mechanical properties of the ceramic powder are very different from those of the Ag sheath. And by these properties, Bi2223 high-temperature superconductor, which has a single filament drawing process and multi-filament drawing process, has a defect like sausaging and bursting at a center. This study analyzed multi-filament drawing process by FEM, and a defect generated during multi-filament drawing was studied by FEH. Specially, in order to prevent a bursting at a center, this study presented a method that inserts a pure Ag at a center of multi-filament wire

The Drawing Properties of Aluminum Wire in Aged Overhead Conductor (폐가공송전선용 Al선재의 신선가공 특성)

  • Kim, Shang-Shu;Ku, Jae-Kwan;Lee, Young-Ho;Kim, Byung-Geol
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.6
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    • pp.482-487
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    • 2013
  • The new recycling technology for aged aluminum wires in overhead conductor have been carried out. We are attempting to develop remanufacturing method for them for more effective way of recycling in stead of its conventional remelting process. The drawing process of aged aluminum wires play a role in remanufacture process. Drawing process was performed under lubricant. The speed of drawing was between 500 m/min and 1,000 m/min. These machines have 11 or 12 dies house for breakdown of the feedstock. Material of the die is tungsten carbide and they have generally 25% reduction ratio. The paper investigates the mechanical properties during drawing process of aged aluminum wire. The results of tensile tests and microscopic analysis were discussed to underscore the hardening features of drawing aluminum wire. Various graphs are presented accompanied by discussion about their relevance on the process.

Bi-2223/Ag HTS Drawing Process Study for Uniform Deformation I (Bi-2223/Ag 고온초전도선재의 가공균일성에 미치는 인발공정연구 I)

  • Kim, S.C.;Ha, H.S.;Oh, S.S.;Lee, D.H.;Yang, J.S.;Ha, D.W.;Kwon, Y.K.;Han, L.Y.;Lee, J.G.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.04a
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    • pp.55-58
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    • 2002
  • PIT method which is used at fabricating Bi-2223/Ag HTS wire includes a drawing process, conventional deformation method. Drawing of meta1(Ag) and ceramic (BiSrCaCuO) composite is also difficult and significant for uniform deformation. In this paper, parameters of uniform deformation was studied at Bi-2223/ Ag multifilamentary HTS wire. Powder and rod as a starting precursor was compared at 55 filament and 54 filament Bi-2223/Ag HTS wire, respectively. Micro-hardness and area COV of the filaments was also evaluated when the diameters were decreased through drawing operations.

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Implementation of Digital Light Drawing System based on Stereo Vision (스테레오 비전 기반 Light Drawing 시스템 구현)

  • Park, Won-Bae;Park, Chang-Bum;Paik, Doo-Won
    • The Journal of the Korea Contents Association
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    • v.10 no.2
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    • pp.130-137
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    • 2010
  • Light Drawing is a photographic technique which exposures are made at night or in a darkened room usually by moving a hand-held light source[1]. Due to the limitations of equipment and environment, users having difficulty in drawing a picture in 3D space. If user take a light drawing, they need a camera that have function and darkened environment. Alternative solution is that we can make a light drawing picture by using the computer drawing tool as in Photoshop. Nevertheless, this solution will let the User lose their interest in drawing because this solution cannot synchronize between the real action of human hand motion and the electronic input devices such as mouse and keyboard. This paper proposed a digital content that can make light drawing easier. We used a digital content that will facility Light Drawing easier. We can measure the light spot position by using the stereo camera. Based on the measured position of the light spot, we reproduce light drawing in virtual space by using drawing effect method.

Effect of drawing process parameters on a sausaging in Bi(Pb)-2223 superconductor (Bi(Pb)-2223 초전도 선재에서 소세징에 대한 인발 공정 변수의 영향)

  • 박동인;김병민;오상수;하홍수
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2003.05a
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    • pp.311-314
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    • 2003
  • Superconduction materials possess electrical/electronic and magnetic properties. Because superconduction materials is a ceramic powder, that can not be produced singlehandedly. So Ag sheathed Bi-2223 wire was produced by drawing process using powder-in-tube(PIT) method This superconductor has many difficulties to produce. The main difficulty is that the mechanical properties of the ceramic powder are very different from those of the Ag sheath. Actually, the fabrication of Ag sheathed Bi-2223 superconductor by PIT tends to lead to non-uniformity in the core thickness during drawing process. That is so called “Sausaging”. This study analyzed a sausaging using the finite-element method. Also, Effects of drawing process parameters on a sausaging has been carried out using finite element method. Finally, A way to prevent a sausaging has been discussed.