• Title/Summary/Keyword: 광조형장치

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광조형법을 구현하기 위한 장치구성 및 조형에 관한 연구 (제 1 보)

  • 이원정
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.04b
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    • pp.481-484
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    • 1995
  • 3차원 CDA 시스템의 보급 및 설계단게에 적용이 확대 되어 가면서 CAD 시스템에 의한 3차원 입체모형제작 기술에 많은 관심이 주목되고있다. 특히 최근에는 광조형 장치가 상품개발사이클의 단축화와 Concurrent Engineering 실현의 중요한 도구로써 자리매김을 하고있으므로 본 논문에서는 광조형장치의 구성 및 조형 사례에 대하여 기술하고자 한다.

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Determining Variables of Fabrication for Stereolithograpy (유전자 알고리즘을 이용한 광조형장치의 작업변수 결정)

  • 전근수;백인환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.910-913
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    • 2000
  • In this research we investigate geometric issues involved while using a particular rapid prototyping system, called Stereolithography(SLA). SLA create prototypes layer by layer, each layer being formed by scanning a laser beam across the x, y surface of a vat of liquid monomer mix. The performance of SLA is influenced by orientation and layer thickness of designed fabrication. The number of layer and the area needed support is influenced by the orientation and layer thickness of designed fabrication. The step influence and volume error is influenced by slice thickness. We minimize the support are, the number of layer and cusp height. These variables of fabrication is minimized using genetic algorithm. The time for genetic algorithm is as little as we can accept. So we calculate support area and cusp height simply.

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The Study of improvement for Shape Accuracy in Stereolithography (광조형법에 있어서 조형정도향상을 위한 연구)

  • 강원주;김준안;백인환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.04a
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    • pp.847-851
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    • 1997
  • In the stereolithography process, the accuracy of cured shape depends on laser power, scanning speed, scanning pattern, resin characteristics etc. When three-dimensional objects are built, higher laser power gives higher building efficiency. Normally we could control scanning speed and scanning pattern, which affect curing thickness and generate volume of curl in & after building. Oligomer, Monomer and Initiator are major components. Kinds and of them decide characteristic of resin. In this paper, we deak with major facts and their characteristics for precision shape building.

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The Study on Improvement of Shape Accuracy in Stereolithography (광조형법에 있어서 조형정도향상을 위한 연구)

  • Kim, Jun An;Paik, In Hwan
    • Journal of the Korean Society for Precision Engineering
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    • v.14 no.5
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    • pp.15-21
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    • 1997
  • In the stereolithography process, the accuracy of cured shape depends on laser power, scanning speed, scanning pattern, resin characteristics etc. When three-dimensional objects are built, higher laser power gives higher building efficiency. Normally we could control scanning speed and scanning pattern, which affect curing thickness and generate volume of curl in & after building. Olgomer, Monomer and Initiator are major components. Kinds and volume of them decide characteristic of resin. In this paper, we deal with major facts and their characteristics for precision shape building.

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Layout Planning for Stereolithography Parts using 3D Collision Detection Algorithm (3차원 충돌탐지 알고리듬을 이용한 광조형물의 최적배치 알고리듬 개발)

  • Kim, Boo-Young;Lee, Seok-Hee;Kim, Ho-Chan
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.27 no.9
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    • pp.1546-1554
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    • 2003
  • Efficient layout in a fixed work volume reduces build time when multiple parts are built at once in stereolithography systems. An efficient algorithm is developed for 3D layout planning. And it reduces build time and increases efficiency of SLA system. Genetic algorithm is implemented to locate as many parts as possible in the fixed work volume. A 3D collision detection algorithm, k-DOPs Tree, is implemented for the fast evaluation of a layout plan.

Minimization of Post-processing area for Stereolithography Parts by Selection of Part Orientation (부품방향의 선정을 통한 광조형물의 후가공면적 최소화)

  • Kim, Ho-Chan;Lee, Seok-Hee
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.11
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    • pp.2409-2414
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    • 2002
  • The surfaces of prototypes become rough due to the stair-stepping which is the inevitable phenomenon in the Rapid Prototypes are not used only for the verification of feature. The grinding, coating, or the composition of them is a main operation in post-processing in which lots of costs and long build time are needed. The solution is proposed to increase the efficiency of rapid prototyping by minimizing or removing the composition of them is a main operation in post-processing in which lots of costs and long build time are needed. the solution is proposed to increase the efficiency of rapid prototyping by minimizing or removing the regions for post-processing. the factors to cause the surface roughness and their effects are analyzed through the experiments. Software modules are developed to predict the surface roughness of each face in the prototyping with the result. An experimental compensation method is developed to apply the modules to various RP equipments, materials and build styles. The build direction is searched with use of genetic algorithm to maximize the total areas of the surface of which roughness is better than the user-defined value.

Development of Cross-sectional Information Conversion System from STL file for Stereolithography (Stereolithography를 위한 STL파일로부터 단면정보 변환시스템의 개발)

  • Choi, Hong-Tae;Kim, Jun-An;Lee, Seok-Hee;Paik, In-Hwan
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.11
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    • pp.140-147
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    • 1995
  • This paper deals with conversion from the STL file to the Slice to the Slice cross-sectional information for Stereolithography. The STL file is widely used for Stereolithography, but it is very difficult to convert STL file into Slice file directly. Because it consists of an ordered list of triangular net without any topological information other than the orientation of each facet. So, The system is accomplished by data flow through several intermediate stages such as Reference. SL1. .SL2L. .SL3. and .SLC file. The data processing is performed in 5 steps: 1) Create a Reference file including common information. 2) Modify STL file within the effective range of SL machine. 3) Calculate a point of intersection between plane equation and line equation. 4) Sort z values in ascending order using quick sort algorithm. 5) Search the adjacent points and formulate a closed loop usingsingly linked linear list. The system is developed by using Borland C++ 3.1 compiler in the environment of Pentium PC, and verified to be satisfactory by making some prototypes of electric household appliances.

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