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    Modeling of Conduction Mode Laser Welding Process For Feedback Control

    Source: Journal of Manufacturing Science and Engineering:;2000:;volume( 122 ):;issue: 003::page 420
    Author:
    Fuu-Ren Tsai
    ,
    Elijah Kannatey-Asibu
    DOI: 10.1115/1.1285864
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The response of conduction mode laser weld pool dimensions, specifically weld width, to a step change in power input has been modeled using two-dimensional heat flow analysis. The goal is to develop a simplified model suitable for feedback control. The weld pool geometry was approximated by a tear-drop shape. The workpiece thermal properties were assumed to be lumped and temperature-independent. The result was a first-order weld pool thermal model. A series of experiments was performed using different welding conditions (plate thickness, step power changes, and welding speeds) to validate the model. The weld pool image was recorded using a vision system and digitized. The process time constant as calculated by the model was of the order of 10−4 seconds. The response of the laser machine, estimated by the least squares method, was found to be about 10−2 seconds, which is much slower than that of the weld pool. Thus, within the constraints of the assumptions on which the model is based, the entire laser welding process is considered to be dominated by the laser machine dynamics. [S1087-1357(00)00502-5]
    keyword(s): Heat , Temperature , Lasers , Heat conduction , Drops , Laser welding , Welding , Modeling , Feedback , Shapes , Machinery , Steady state , Equations , Dimensions , Flow (Dynamics) , Geometry , Thermal properties AND Temperature gradients ,
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      Modeling of Conduction Mode Laser Welding Process For Feedback Control

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    http://yetl.yabesh.ir/yetl1/handle/yetl/123966
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    contributor authorFuu-Ren Tsai
    contributor authorElijah Kannatey-Asibu
    date accessioned2017-05-09T00:02:52Z
    date available2017-05-09T00:02:52Z
    date copyrightAugust, 2000
    date issued2000
    identifier issn1087-1357
    identifier otherJMSEFK-27415#420_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/123966
    description abstractThe response of conduction mode laser weld pool dimensions, specifically weld width, to a step change in power input has been modeled using two-dimensional heat flow analysis. The goal is to develop a simplified model suitable for feedback control. The weld pool geometry was approximated by a tear-drop shape. The workpiece thermal properties were assumed to be lumped and temperature-independent. The result was a first-order weld pool thermal model. A series of experiments was performed using different welding conditions (plate thickness, step power changes, and welding speeds) to validate the model. The weld pool image was recorded using a vision system and digitized. The process time constant as calculated by the model was of the order of 10−4 seconds. The response of the laser machine, estimated by the least squares method, was found to be about 10−2 seconds, which is much slower than that of the weld pool. Thus, within the constraints of the assumptions on which the model is based, the entire laser welding process is considered to be dominated by the laser machine dynamics. [S1087-1357(00)00502-5]
    publisherThe American Society of Mechanical Engineers (ASME)
    titleModeling of Conduction Mode Laser Welding Process For Feedback Control
    typeJournal Paper
    journal volume122
    journal issue3
    journal titleJournal of Manufacturing Science and Engineering
    identifier doi10.1115/1.1285864
    journal fristpage420
    journal lastpage428
    identifier eissn1528-8935
    keywordsHeat
    keywordsTemperature
    keywordsLasers
    keywordsHeat conduction
    keywordsDrops
    keywordsLaser welding
    keywordsWelding
    keywordsModeling
    keywordsFeedback
    keywordsShapes
    keywordsMachinery
    keywordsSteady state
    keywordsEquations
    keywordsDimensions
    keywordsFlow (Dynamics)
    keywordsGeometry
    keywordsThermal properties AND Temperature gradients
    treeJournal of Manufacturing Science and Engineering:;2000:;volume( 122 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian