大型厚壁半球形封頭成形工藝的理論與實(shí)驗(yàn)研究.pdf

1、太原科技大學(xué)碩士學(xué)位論文大型厚壁半球形封頭成形工藝的理論與實(shí)驗(yàn)研究姓名：郭玉茹申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料加工工程指導(dǎo)教師：劉建生安紅萍20090701ABSTRACTHeavyforgings，asimportantbasiccomponentsintechnologicalequipmentsandmajorprojects，arewidelyusedinnuclearpowerhydropowerthermalpowerandtr

2、ansportationItsmanufacturingcapacityandtheleveldirectlyinfluencetherelatedequipment—manufacturingcapacityandthelevelHoweverthereisahugegapbetweenChinaandothercountriesSomeadvancedproducts，likeheavyforgingsusedforlarge—sc

3、aledhydropowernuclearpowerthermalpowerandmetallurgyindustryarefarbeyondthedemandqualitywhichhasbecamethebottleneckblockingthekeyprojectconstructionsandimportanttechnologicalequipmentsObjectingtheformingtechnologyoftheHyd

4、roeciumheadontheNuclearevaporatorthispaperusestheresearchmethodcombined、Ⅳitllthefiniteelementnumericalsimulationandtheexperimentalverification，mainlyreseachesthelawofmaterialsplasticdeformationandtheoptimizationofprocess

5、parametersinthedrawingandlocalholeflanging，andanalyzesthemainfactorseffectingthedrawingandholeflangingforming，finallywesummarizetheeffectinglawofeachprocessparametersintheforming，anddeterminetheprocessprojecteventuallyth

6、eresearchcontentsandconclusionsofthispaperareasfollows：1)drawingdeformation：Throughtothesemifinlshedmaterialsshapeofstripandthemoldrevision，andunifiesthemoldgaptheadjustmentandSOonthedifferentplan，inthesolutioninitialpla

7、nsphericalsurfacepartialwallthicknessnon—uniformandstraightwallpartialwallthicknessandbacksupthepositionnottoconformtoforgingchartquestionsandSOonrequirement，enablesthesphericalsurfacepartialwallthicknessthinnestspotinto

8、achievetheforgingchartrequestunderthepremise，strivesforthedrawingshellcoverformingthemostsuperioreffect，hasdeterminedthereasonablecraftparameter2)holeflanging：basedonthesheetdrawingformingandfollowingtherequirements，hole

9、flangingformstwojointpipesectionsinthedesignatedspottotheSemi—sphericalheadconsideringthewall—thicknessandmaximamflangingheightofjointpipesections，weoptimizethefactorsofpreprocessingholediameterandholeprofile，improvethep