激光微烧结工件表面的激光微抛光分析-laser micro-polishing analysis of laser micro-sintered workpiece surface.docxVIP
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激光微烧结工件表面的激光微抛光分析-laser micro-polishing analysis of laser micro-sintered workpiece surface
AbstractTheSelectiveLasermicroSintering(μ-SLS)whichisdevelopedfromSelectiveLaserSintering(SLS)canconvenientlymanufacturemicrometalmoldfrommetalpowdersandtheCADmodel.Itisnecessarytopolishthesurfaceofmicrometalmoldbecauseofthebadaccuracyandsurfaceroughnessoftheμ-SLS.ThispapertakesthenewtechnologyofLasermicroPolishing(μ-LP)topolishthemetalpartssurfaceofμ-SLS.Firstitdescribesthedomesticandinternationaldynamicsoflaserpolishing.Thenstudiesonμ-LPandgetssomevaluableresultsaccordingfromthecharacteristicsofthemetalpartssurfaceofμ-SLSasfollows:Severalpossibleprogramsofμ-LPareinvestigatedonthebasisof:remelting、scanningthinpowder-bedandremeltingafterthescanningthinpowder-bed.Theresultsofthesethreemethodshavebeencomparedandtheoptimummethodisobtained.Thatissannningthinpowder-bed:spreadingathinmetalpowderlayeronthesampleandpolishingitbyμ-LP.Inthisway,theoriginalroughnessRa18.533μmreducesto12.152μm,decreasedby34.4%.Theeffectofparametersandsamplesizeforμ-LPisstudied.Itconcludestheparametershavegreatinfluenceonμ-LPandgetsthebestparameters.NonSignificantdifferencecanbefoundbyusingcontinuouswavelaserandpulsedlaser.Thebestresultisstillbasedontheoptimalprocessparameters.Finally,thepaperalsoproposedamodifiedprogram:preheatingsamples,coolinggently,improvingthescratchpowderprocessandrescanning.Keywords:μ-SLSμ-LPprocessparametersroughness目录摘要..................................................................................................................IAbstract................................................................................................................II1绪论1.1课题来源..................................................................................................(1)1.2课题的目的及意义..................................................................................(1)1.3本论文的主要研究内容..........................................................................(3)2激光微抛光技术及国内外研究动态2.1激光抛光技术的发展..............................................................................(4)2.2激光微抛光机理..........
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