ST16鋼激光拼焊板漸進(jìn)成形研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文ST16鋼激光拼焊板漸進(jìn)成形研究姓名：趙秀敏申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：高霖20100101STl6鋼激光拼焊板漸進(jìn)成形研究AbstractTheNCincrementalformingprocessisanewlydevelopedanddielesstechnologywhichistryingtogiveafastandeconomicsolutiontoformthesheetbla

2、nkAndtailorweldedblanksffwB)hasbeengiveneVenmoreandmoreattentionforitsadvantagebyindustryandacademiaInthispaperinerernentalformingisfirstappliedtotheformingofTWBFirstofall，theformingthebasisoftailorweldedblanksaleintrodu

3、eeASecondlytheplasticformabilityoftheTWBintensiletestsisanalyzedwiththeexperimentsoftheunequalthicknessTWBspecimensThirdlytheformabilityandWatI“characteristicoftheSTl6steel，whichisthebasematerialsofTWB，ininerernentalform

4、ingprocessunderdifferentlubricatingconditionsarestudiedFourthly，theformabilityoftheTwBinincrementalformingprocessunderdifferentprocessparameters，such笛toolsize、stepsizeandweldingseamspositionsalestudiedTheinfluenceofthese

5、processparametersarecheckedbyorthogonaltestmethodTheexperimentalresultsa托showedthat：1Inlongitudinaltestthefracturealwaysoccurred013themiddleoftensilespecimens；intransversetests，thefracturealwaysoccurredOnthethinnerside2T

6、hechangesoflubricationinincrementalformingproces$couldirfflueneethemaximumformingangleandtheweal“characterMaximumformingangleislargestunderthelubricationofphosphatetreatmentandlithiumbasedmolybdenumdisulfidegreaseAndthew

7、eal“characteristicismainlyallabrasivewearwhenthetoolforcedownthecertainheightTheweal“characteristicismainlyalladhesivewearwhenthetoolformingthesectionprofile3ThedominantinfluenceinincrementalformingprocessofTWBwithdiffer

8、entthicknessisstepsize，whereasthedominantinfluenceinincrementalformingprocessofthebasematerialsofTWBisthicknessToolsizeandstepsizehaverelations、^，itlllengthandbreadthofthecrackingBesideinrespectofthethicknessafterforming

9、，TWBdiffersfromthebasematerialsofTWBThisarticleprovidesanewformingapproachbyincrementalforming，forTWB，andthiswillbreaktheunityofitstraditionalformingmethodsKeywords：NCineremerltalforming，tailorweldedblanks，lubrication，fo