资源描述：
《An experimental study of optical glass machining》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、IntJAdvManufTechnol(2004)23:155–160DOI10.1007/s00170-003-1576-3ORIGINALARTICLEF.Z.FangÆG.X.ZhangAnexperimentalstudyofopticalglassmachiningReceived:22October2002/Accepted:22October2002/Publishedonline:10December2003ÓSpringer-VerlagLondonLimited2003Abstract
2、Owingtobrittlenessandhardness,opticalcanbemachinedtonanometricsurfacewithgrindingglassisoneofthematerialsthatismostdifficulttocut.andpolishing.DiamondcuttingisaviablealternativetoNevertheless,asthethresholdvalueoftheundeformedgrindingandpolishingtechniquesf
3、orfabricatinghigh-chipthicknessisreached,brittlematerialsundergoaqualitysurfacesonbrittlematerialsasawell-definedtransitionfromthebrittletotheductilemachiningre-singlepointtoolismorepredictablethanamulti-pointgion.Belowthisthreshold,itisbelievedthattheener
4、gygrindingwheel.Theavailabilityofhigh-precisionturn-requiredtopropagatecracksislargerthantheenergyingmachinesisabasicrequirementforductilemachin-requiredforplasticdeformation.Thus,plasticdefor-ingofbrittlematerials.Thesemachinesmustprovidemationisthepredo
5、minantmechanismofmaterialre-extremelyhightoolpositionaccuracyinthenanometermovalinmachiningthesematerialsinthismode.Anrange.Ultra-precisioncuttingcancauseacrack-dam-experimentalstudyisconductedtodiamond-cutBK7agedlayerofafewtensofmicronswhenmachiningaglas
6、sinductilemode.Asaneffectiverakeangleplaysabrittlematerialsuchasglass[1,2,3,4,5].However,moreimportantrolethananominalrakeangledoes,awhenthefeedrateordepthofcutexceedsacriticaldiscussionaboutthiseffectiveangleiscarriedoutinthespecificvalue,thematerialinthewo
7、rkpiecechangespaper.Theinvestigationpresentsthefeasibilityoffromdefinedductiletoundefinedbrittlemode[4,5,6,7,achievingnanometricsurfaces.Powerspectraldensity8].Thismeansthatwhentheundeformedchipthickness(PSD)analysisonthemachinedsurfacesshowstheisreducedtos
8、ub-micronlevel,ductilemachiningcanbedifferencebetweenthecharacteristicsofthetwomodes.achieved[3,9,10,11,12,13,14,15,16].UsingdiamondDuringtheexperiments,itisrecognisedthattoolwearistoolswithanegativerakeangle,materia
