• Title/Summary/Keyword: FDM(Fused Deposition Modeling)

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Strength Prediction Model and The Internet Service of Fused Deposition Modeling (Fused Deposition Modeling의 강도예측모델과 인터넷 서비스)

  • 백창일;추원식;이선영;안성훈
    • Proceedings of the Korean Society For Composite Materials Conference
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    • 2002.10a
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    • pp.179-182
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    • 2002
  • Rapid Prototyping (RP) technologies provide the ability to fabricate initial prototypes from various model materials. Stratasys' Fused Deposition Modeling (FDM) is a typical RP process that can fabricate prototypes out of plastic materials, and the parts made from FDM were often used as load-carrying elements. Because FDM deposits materials in about $300\mutextrm{m}$ thin filament with designated orientation, parts made from FDM show anisotropic material properties. This paper proposes an analytic model to predict the tensile strength of FDM parts. Applying the Classical Lamination Theory, which was developed for laminated composite materials, a computer code was implemented. Tsai-Wu failure criterion was added to the code to predict the failure of the FDM parts. The tensile strengths predicted by the analytic model were compared with experimental data. The data and prediction agreed reasonably well to prove the validity of the model. In addition, a web-based advisory service was developed to provide to strength prediction and design rules for FDM parts.

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Determining Optimal Build Orientation in Fused Deposition Modeling for Minimizing Post Machining by Using Genetic Algorithm. (FDM(Fused Deposition Modeling) part의 후가공 최소화를 위한 최적성형방향 결정)

  • 안대건;김호찬;양화준;이일엽;장태식;정해도;이석희
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.18-21
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    • 2003
  • Fused Deposition Modeling (FDM) parts are made by piling up thin layers that cause the stair stepping effect at the surface of FDM parts. This effect brings about poor surface roughness of the part and requires additional post machining such as manual finishing that is detrimental to the part geometry and time consuming. Determining optimal build orientation for FDM parts can be one solution to minimize the post machining. However, by using the CAD model, calculating the optimal build orientation is impractical due to heavy computing process. In order to calculate the optimal build orientation with high speed. the surface roughness model based on measured data and interpolation is newly developed in this research. Also. the genetic algorithm (GA) is applied for acquiring reliable solution. Finally, It is verified from the test that the presented approach is very efficient for reducing the additional post machining process fer FDM parts.

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Irregular surface output using FDM (Fused Deposition Modeling) 3D printer (FDM(Fused Deposition Modeling) 방식 3D 프린터를 이용한 불규칙한 표면 출력)

  • Lee, Jung-Soo;Cha, Kyung-Chul
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.32 no.1
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    • pp.33-39
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    • 2022
  • As 3D printer-related patents expire and major technologies are disclosed, the price of 3D printers is dropping, creating an environment where you can easily find the product you want. In particular, the cheapest FDM (Fused Deposition Modeling) 3D printer is being used in various fields. The FDM method can be manufactured without collapsing of the shape only by attaching a support under certain conditions when outputting the shape. When printing a shape without a support, the irregular surface that occurs at a certain angle is a defect in the product, but it is considered that it can be used as another fun factor in terms of arts and crafts. In this paper, to obtain such an irregular surface, factors that can affect the output were controlled and only the output angle was tested as a displacement factor. As a result of the experiment, it was possible to obtain an irregular surface without the filament flowing down when printing at an angle of 62° to 70° from the vertical. Also, artificially irregular surfaces were applied to craft products.

Material Characterization of RP Process - Fused Deposition Modeling (쾌속조형용 재료의 특성 - FDM)

  • 김승화;안성훈
    • Korean Journal of Computational Design and Engineering
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    • v.7 no.2
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    • pp.96-101
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    • 2002
  • Rapid Prototyping (RP) technology has been advanced to fabricate initial prototypes from various materials. Stratasys′ Fused Deposition Modeling (FDM) is one of the typical RP processes that provide functional prototypes of ABS plastic. In order to predict the behavior of final ABS parts, it is critical to understand the material properties of the raw FDM process material, and the effect that FDM build parameters have on the FDM part. In this paper, we seek to characterize the properties of ABS parts fabricated by the FDM 1650. Using the Design of Experiment (DOE) approach, the process parameters of FDM, such as raster orientation, air gap, bead width, color, and model temperature were examined. Tensile strengths of crisscross specimens, 〔45°/-45°〕, cross specimens, 〔0°/90°〕, and directionally fabricated tensile specimens (〔0°〕 and 〔90°〕) were measured and compared with the injection molded FDM-ABS P400 material. For the FDM parts made with a -0.003"air gap, the typical tensile strength ranged between 50 percent and 83 percent of the strength of injection molded ABS P400. From the experiments, a couple of build rules for designing FDM parts were obtained.

Strength Prediction Model of Rapid Prototyping Parts - Fused Deposition Modeling (FDM) (쾌속조형재료의 강도예측모델 - Fused Deposition Modeling (FDM))

  • 안성훈;이선영;백창일;추원식
    • Composites Research
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    • v.15 no.6
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    • pp.38-43
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    • 2002
  • Rapid Prototyping(RP) technologies provide the ability to fabricate initial prototypes from various model materials. Stratasys' Fused Deposition Modeling(FDM) is a typical RP process that can fabricate prototypes out of plastic materials, and the parts made from FDM were often used as load-carrying elements. Because FDM deposits materials in about 300$\mu$m thin filament with designated orientation, parts made from FDM show anisotropic material properties. In this paper an analytic model was proposed to predict the tensile strength of FDM parts. Applying the Classical Lamination Theory, which was developed for laminated composite materials, a computer code was implemented. Tsai-Wu failure criterion was added to the code to predict the failure of the FDM parts. The tensile strengths predicted by the analytic model were compared with experimental data. The data and prediction agreed reasonably well to prove the validity of the model. In addition, a web-based advisory service(FDMAS) was developed to provide strength prediction and design rules for FDM parts.

Prediction of sphere surface by the theoretical area error at FDM (FDM에서 이론적 면적오차법에 의한 구형제품의 표면예측)

  • 전재억;권혁준;김수광;김준안;정진서;하만경
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.10a
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    • pp.262-265
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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 wiか physical objects of my complexity in a relatively short period of time. But it has a matter of surface roughness and geometric accuracy. We study on Influence of angle of tangent line and area error on sphere surface roughness at fused deposition.

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Research On Solutions To Slicing Errors In FDM 3D Printing Of Thin-walled Structures

  • QINGYUAN ZHANG;Byung-Chun Lee
    • International Journal of Internet, Broadcasting and Communication
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    • v.16 no.1
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    • pp.176-181
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    • 2024
  • The desktop-level 3D printing machines makes it easier for independent designers to produce collectible models. Desktop 3D printers that use FDM (Fused Deposition Modeling) technology usually use a minimum nozzle diameter of 0.4mm. When using FDM printers to make Gunpla models, Thin slice structures are prone to slicing errors, which lead to deformation of printed objects and reduction in structural strength. This paper aims to analyze the printing model that produces errors, control a single variable among the three variables of slice layer height, slice wall thickness and filament type for comparative testing, and find a way to avoid gaps. To provide assistance for using FDM printers to build models containing thin-walled structures.

Temperature Analysis of Nozzle in a FDM Type 3D Printer Through Computer Simulation and Experiment

  • Park, Jung Hyun;Lyu, Min-Young;Kwon, Soon Yong;Roh, Hyung Jin;Koo, Myung Sool;Cho, Sung Hwan
    • Elastomers and Composites
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    • v.51 no.4
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    • pp.301-307
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    • 2016
  • Additive manufacturing (AM), so called 3D Printing is a new manufacturing process and is getting attraction from many industries. There are several methods of 3D printing. Among them fused deposition modeling (FDM) type is most widely used by reason of cheap maintenance, easy operation and variety of polymeric materials. Articles manufactured by 3D printing have weak deposition strength compared with conventionally manufactured products. Deposition strength of FDM type 3D printed article is highly dependent of deposition temperature. Subsequently the nozzle temperature in the FDM type 3D printing is very important and it is controlled by heat source in the 3D printer. Nozzle is connected with heat block and barrel, and heat block contains heat source. Nozzle becomes hot through heat conduction from heat source. Nozzle temperature has been predicted for various thermal boundary conditions by computer simulation and compared with experimental measurement. Nozzle temperature highly depends upon thermal conductivities of heat block and nozzle. Simulation results are good agreement with experiment.

Estimation of Process Window for the Determination of the Optimal Process Parameters in FDM Process (FDM 3D 프린터 최적 공정 변수 선정을 위한 공정 윈도우 평가법)

  • Ahn, Il-Hyuk
    • Journal of the Korea Convergence Society
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    • v.9 no.8
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    • pp.171-177
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    • 2018
  • In 3D printing technologies, many parameters should be optimized for obtaining a part with higher quality. FDM (fused deposition modeling) printer has also diverse parameters to be optimized. Among them, it can be said that nozzle temperature and moving speed of nozzle are fundamental parameters. Thus, it should be preceded to know the optimal combination of the two parameters in the use of FDM 3D printer. In this paper, a new method is proposed to estimate the range of the stable combinations of the two parameters, based on the single line quality. The proposed method was verified by comparing the results between single line printing and multi-layered single line printing. Based on the comparison, it can be said that the proposed method is very meaningful in that it has a simple test approach and can be easily implemented. In addition, it is very helpful to provide the basic data for the optimization of process parameters.

Identification and Optimization of Dominant Process Parameters Affecting Mechanical Properties of FDM 3D Printed Parts (압출적층조형 공정 기반 3D 프린팅 제품 기계적 특성의 지배적 공정인자 도출 및 최적화에 관한 연구)

  • Kim, Jung Sub;Jo, Nanhyeon;Nam, Jung Soo;Lee, Sang Won
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.41 no.7
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    • pp.607-612
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    • 2017
  • Recently, additive manufacturing (AM) technology, also known as 3D printing technology, has attracted attention as an innovative production method to fabricate functional components having complex shapes with saving materials. In particular, a fabrication of poly lactic acid (PLA) parts through a fused deposition modeling (FDM) technique has attracted much attention in the medical field. In this paper, an experimental study on the identification of dominant process parameters influencing mechanical properties of PLA parts fabricated by the FDM process is conducted, and their optimal values for maximizing the mechanical properties are obtained. Three process parameters are considered in this research, namely, layer thickness, a part orientation and in-fill. It is known that thin layer thickness, part orientation diagonal to the tension direction, and full in-fill are optimal conditions to maximize the mechanical properties.