• Title, Summary, Keyword: 급속조형

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Imfluence of Surface roughness on Rapid prototyping by FDM (FDM 장치에서 쾌속조형물의 형상이 표면 거칠기에 미치는 영향)

  • 전재억;정진서;하만경
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.1037-1041
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    • 2001
  • Competitive power is rapidly manufacture product required consumers. Therefore, modern industry have changed from small item many production to many item small production, rapid production is necessary thing at the product development. Thus, rapid prototyping is appeared. If the graphic model was made by CAD, the production can be made in short term. That provide what the part was directly tested by the worker. It provide believable data. This study is Imfluence of Surface roughness on Rapid prototyping by FDM(Fused deposition modeling).

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Influence of Tangent Line Angle on Surface Roughness at Fused Deposition (FDM에서 곡면부의 접선기울기가 제품의 표면에 미치는 영향)

  • Ha, Man-Kyung;Jun, Jae-Uhk
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.1 no.1
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    • pp.23-28
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    • 2002
  • Fused deposition modelling(FDM) is a rapid prototyping(RP) process that fabricates part layer by layer by deposition of molte thermoplastic material extrude from a nozzle. RP system has benefits. Benefit would be the ability to experiment with physical objects of any complexity m a relatively short period of time. But it has a matter of surface roughness and geometric accuracy. We study on Influence of tangent line angle on surface roughness at fused deposition.

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Influence of tangent line angle on surface roughness at fused deposition (FDM에서 곡면부의 접선기울기가 쾌속조형물의 표면에 미치는 영향)

  • 전재억;권광진;정진서;김준안;김수광
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.1067-1070
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    • 2002
  • Fused deposition modelling(FDM) is a rapid prototyping(RP) process that fabricates part layer by layer by deposition of molten thermoplastic material extrude from a nozzle. RP system has many benefit. One of the benefit would be the ability to experiment with physical objects of any complexity in a relatively short period of time. But it has a matter of surface roughness and geometric accuracy. We study on Influence of tangent line angle on surface roughness at fused deposition

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A Study on Error Verification of STL Format for Rapid Prototyping System (급속조형 시스템을 위한 STL 포맷의 오류 검증에 관한 연구)

  • Park, H.T.;Lee, S.H.
    • Journal of the Korean Society for Precision Engineering
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    • v.13 no.10
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    • pp.46-55
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    • 1996
  • As industrial standard data, the STL format which approximates three dimensional CAD model to triangular facets, is used for RP(Rapid Prototyping) system in recent days. Because most RP system take the only form of two dimensional line segments as an input stream inspite of its imperfectness while converting into STL format, a CAD model is converted into a standard industrial format which is composed of many triangular facets. The error verifying process is composed of four main steps, and these are 1) Remove facets with two or more vertices equal to each other. 2) Fix overlapping error such as more than three facets adjacent to anedge. 3) Fill holes in the mesh by using Delaunay triangulation method. 4) Correct the wrong direction and normal vectors. This paper is concerned with serching the mentioned errors in advance and modifying them.

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A Study on Error Verification of STL format for Rapid Prototyping System (급속조형시스템을 위한 STL 포멧의 오류 검증에 관한 연구)

  • 최홍태;이석희
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.597-601
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    • 1996
  • Nowadays, the STL format, industrial standard data, which approximates three dimensional CAD model to triangular facets, is used for RP(Rapid Prototyping) system. Because most RP machine is accpted to only two dimensional line segments, but some STL translators are sometimes poorly implemented. The error verifying process is as follows. 1) Remove facets with two or more vertices equal to each other. 2) Fix overlapping error such as more than three facets adjacent to an edge. 3) Fill holes in the mesh by using Delaunay triangulation method. 4) Repair wrong direction and value of normal vectors. This paper is concerned with searching the mentioned errors in advance and modifying them.

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급속 조형을 위한 STEP파일의 다이렉트 슬라이싱에 관한 연구

  • 김영한;최홍태;이석희
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.898-902
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    • 1995
  • STEP is a neutral model for exchanging CAD modelbetween different CAD systms. The paper presents a laser path contour generation for rapid prototyping originated form STEP format files without using any tools nor libraries for STEP data manipulation. Polygons are generated from every point on the layer of given thickness, which are the intersections of layer plane and edges stored in entity tables. Curves are approximated with polygons whitin segment tolerance limit in order to cover sculptured surfaces. With the advantage of less data loss in direct slicing over STL formats, the system developed in this work shows a good potential to provide data share with various CAD systems including RP data preparation.

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급속조형기술을 이용한 인체모형의 제작에 관한 연구

  • 이태영;김항묵;채수원;장준근
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.903-906
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    • 1995
  • In this paper,human body models have been manufactured by the use of rapid prototyping techniques, which are to be used for surgery planning in clinical practice. In this manufactacturing process, CT or MRI data of human bodies are prepared and the images are processed to obtain sectional contours. With these contours, three-dimensional surface triangulated models are constructed, which finally transformed to STL file for rapid prototyping. For this purpose, total service system for manufacturing of human body models is constructed by employing commercial softwares, and the related problems and process parameters are investigated

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Study of a change of Surface roughness of sphere by adjustment of extrusion at fused deposition (FDM 장치에서 주사량 조정에 대한 구면체의 표면정도 변화에 관한 연구)

  • 전재억;권광진;정진서;김수광;김광희;하만경
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.1042-1046
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    • 1997
  • Fused deposition modelling(FDM) is a rapid prototyping(RP) process that fabricates part layer by layer by deposition of molten thennoplastic material extrude from a nozzle. RP system has many benefit. One of the benefit would be the ability to experiment with physical objects of any complexity in a relatively short period of time. But it has a matter of surface roughness and geometric accuracy. We research into a change of Surface roughness making the sphere by adjustment of extrusion in FDM.

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Electric Vehicle Quick Charging System on DC Distribution (DC 배전망에서의 전기 자동차 급속 충전 시스템)

  • Baek, Yohan;Kang, Tae Hwan;Oh, Sung Min;Oh, Jeong Hun;Cho, Hyoung Yeon
    • Proceedings of the KIPE Conference
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    • pp.211-212
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    • 2010
  • DC 배전망에서 전기자동차 급속 충전 시스템은 대용량 전력 변환기를 통해 AC 배전망의 전압을 DC 전압으로 변환하여 DC 입력형 급속 충전기에 배전한다. DC 입력형 급속 충전기는 인버터기능이 제거됨으로 구조를 단순화하고 소형경량화 할 수 있다. 또한 충전소 내에 설치된 다수의 충전기 각각이 수행하던 전류 고조파 저감, 역률 향상, 양방향 전력 제어와 같은 기능들을 하나의 장치가 일괄 수행함으로서 충전소 인프라 단위의 신뢰성을 높일 수 있다. 본 논문은 DC 배전망에서의 전기 자동차 급속 충전 시스템의 특징에 대해서 설명하고자 한다.

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