攪拌摩擦焊并聯(lián)機(jī)床靜態(tài)特性分析.pdf

1、國內(nèi)圖書分類號：TG439.8學(xué)校代碼：10213國際圖書分類號：6.2.1密級：公開碩士學(xué)位論文碩士學(xué)位論文攪拌摩擦焊并聯(lián)機(jī)床靜態(tài)特性分析攪拌摩擦焊并聯(lián)機(jī)床靜態(tài)特性分析碩士研究生：BrianNurimba導(dǎo)師：陳照波申請學(xué)位：工學(xué)碩士學(xué)科：機(jī)械設(shè)計(jì)及理論所在單位：機(jī)電工程學(xué)院答辯日期：2014年7月授予學(xué)位單位：哈爾濱工業(yè)大學(xué)、哈爾濱工業(yè)大學(xué)工學(xué)碩士學(xué)位論文IAbstractFrictionstirwelding(FSW)isasol

2、idstateweldingtechnique.Soitdoesn’tinvolvematerialmeltingintheprocess.Thisprocessisquietpopularespeciallyinaircraftspacevehiclemanufacturingindustrysinceitcanweldlightweightaluminiumalloywithaverygoodquality.Howevertheun

3、derstingoftheweldingprocessconditionisstillnotenoughtopredicttheweldqualitytheimpactithastothemachinetool’sstiffnessindifferentweldingparameters.Sincemanufacturingcompanieswanttoincreaseproductivitywithouttoomanyaddition

4、alcost(addinganewproductionlineetc.)sonaturallytheywanttoincreasetheweldingspeedetc.Howeverchangingtheweldingparameterprobablywillcausetheweldqualitysincethereisnotenoughheatinputtotheweldetc.Sotheunderstingoftheweldingp

5、rocessindepthisessential.InthisthesisaFEMsimulationtoobtainthefcestemperatureduringtheFSWprocesshasbeenconducted.ThemodellingsimulationwereconductedinDEFM3Dsoftware.ThewkpiecewhichisbeingweldedftheFSWprocessweremodeledas

6、onewkpieceindertoavoidcontactinstabilitiesduringsimulation.Nomovementboundaryconditionhasbeenplacedonthewkpiece.Theconvectiontotheenvironmentistheonlyboundarycondition.Howeverthesimulationresultisnotgoodenoughtobeusedint

7、henextstepwhichistoapplythefcestothedesignofmachinetool’sassemblyindertogettheresultingstressdefmationofthedesignusingstaticstructuralanalysisofAnsysWkbench.Butstillthestaticstructuralanalysiswasstillconductedusingthekno

8、wnmaximumfcevalue.Thismaximumfcevaluewasgivenbytheweldingcompanywhichproposefthisprojectbasedontheweldingcompany’sexperience.theresultisthestressreceivedbymachinetool’sarestillbelowthetensileyieldstrengthofthematerial.Ho