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    Design and Operation of a Droplet Deposition System for Freeform Fabrication of Metal Parts

    Source: Journal of Engineering Materials and Technology:;2001:;volume( 123 ):;issue: 001::page 74
    Author:
    A. A. Tseng
    ,
    M. H. Lee
    ,
    B. Zhao
    DOI: 10.1115/1.1286187
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A droplet generator has been designed and built to make wax and tin alloy droplets for freeform fabrication. The linear stability theory of liquid jets for forming droplets is first reviewed. The analytical formula for predicting droplet size and breakup length at optimal conditions are then developed. The suitability of the formulas to be used for the present droplet deposition system is studied by comparing its prediction with the more accurate numerical results and previously published experimental data. Only the suitable formulation is adopted for the design and operation of the droplet generator system. Experiments have been conducted at a wide range of operating conditions including different nozzle sizes, jet velocities, and frequencies. Good agreements are found between the predictions based on the adopted analytical formulation and the experimental results. It has been found that using the present design and procedure recommended, the droplet sizes can be controlled having a size deviation of less than 3 percent and the shape variation of the deposited layer can be managed within 3 percent of its deposited width.
    keyword(s): Stability , Temperature , Metals , Manufacturing , Tin alloys , Waves , Design , Nozzles , Frequency , Generators , Viscosity , Density , Shapes , Surface tension , Equations , Formulas AND Jets ,
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      Design and Operation of a Droplet Deposition System for Freeform Fabrication of Metal Parts

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/125339
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    • Journal of Engineering Materials and Technology

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    contributor authorA. A. Tseng
    contributor authorM. H. Lee
    contributor authorB. Zhao
    date accessioned2017-05-09T00:05:04Z
    date available2017-05-09T00:05:04Z
    date copyrightJanuary, 2001
    date issued2001
    identifier issn0094-4289
    identifier otherJEMTA8-27017#74_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/125339
    description abstractA droplet generator has been designed and built to make wax and tin alloy droplets for freeform fabrication. The linear stability theory of liquid jets for forming droplets is first reviewed. The analytical formula for predicting droplet size and breakup length at optimal conditions are then developed. The suitability of the formulas to be used for the present droplet deposition system is studied by comparing its prediction with the more accurate numerical results and previously published experimental data. Only the suitable formulation is adopted for the design and operation of the droplet generator system. Experiments have been conducted at a wide range of operating conditions including different nozzle sizes, jet velocities, and frequencies. Good agreements are found between the predictions based on the adopted analytical formulation and the experimental results. It has been found that using the present design and procedure recommended, the droplet sizes can be controlled having a size deviation of less than 3 percent and the shape variation of the deposited layer can be managed within 3 percent of its deposited width.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDesign and Operation of a Droplet Deposition System for Freeform Fabrication of Metal Parts
    typeJournal Paper
    journal volume123
    journal issue1
    journal titleJournal of Engineering Materials and Technology
    identifier doi10.1115/1.1286187
    journal fristpage74
    journal lastpage84
    identifier eissn1528-8889
    keywordsStability
    keywordsTemperature
    keywordsMetals
    keywordsManufacturing
    keywordsTin alloys
    keywordsWaves
    keywordsDesign
    keywordsNozzles
    keywordsFrequency
    keywordsGenerators
    keywordsViscosity
    keywordsDensity
    keywordsShapes
    keywordsSurface tension
    keywordsEquations
    keywordsFormulas AND Jets
    treeJournal of Engineering Materials and Technology:;2001:;volume( 123 ):;issue: 001
    contenttypeFulltext
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