【doc】 变薄拉深

【doc】 变薄拉深 变薄拉深 《世界机电工程文摘》(英文)2005年(第四期)锻压工艺与设备双月刊 materialdeformationresearches.Investigationsonthe influenceoftheprocessingconditionsintheordinaryshearing processshowedquantitativelythatthestrainconcentrates aroundtheclearancevicinityforsmallclearances 【Developmentofanalyzingsystemapplicableforlargeplastic deformation.ProceedingsoftheFifihInternationalConference onTechnologyofPlasticity,l996,PP.583-590].1’hispaper discussesinvestigationsontheinfluenceoftheshearingratio, toolsizetomaterialthickness.conditionsoffine-blanking appliedforfabricatingprecisionpartssuchasshapeofthe blankholderandblankholdingforce,aswellasdetailson materialf1owandstraindistribution. SY506.4.155 【篇名】Methodologyoffastdevelopmentofcomputer-aided designingsystems—Part2:designingofblankingoperations 【刊号】773P0008 【干lJ名】KY3HeqHO.LllTaMtlOBOqH0en Po143BO?CTBO 【年卷期】2003,no.5 【页码】21—28 【语种】rus -l56 SY506-4 【篇名】Newweldingtechnologyemployedinuniqueplant repair 【刊号】720B0004 【十lJ名】PowerEngineering 【年卷期】2003,vo1.107,no.5 【页码】7 【语种】eng 【文摘】WhenaMidwestU.S.electricutilityrecentlyneeded torepairhigh—pressurefeedwaterheatersatoneofitsfacilities, itusedanexNpowersourcefeaturingSITweldingtechnology fromtheLincolnElectricCompanytogettheplanthackon linefaster.Thedeterioratingconditionoftwohigh—pressure feedwaterheatersforcedthepowerplanttotakethemoutof service.Insteadofremovingthemandreconfiguringtheplant, plantmanagementdecidedtosavedowntimeandexpenseby decommissioningthembutleavingtheminplaceandallowing theflowtopassthroughthem.Thestrategyrequiredtakingthe unitsoutofservice,removingthetomsring,blankingoffthe tubesinside,thenweldingthetorusringbackon. SY506—4—157 【篇名】Numericalevaluationofthetoolwearinfluenceon metal—punchingprocesses 【刊号】737E0004 【刊名】TheInternationalJournalofAdvancedManufacturing Technology 【年卷朗】2003,vo1.2l,no.7 【页码】483.493 【语种】eng 【文摘】Predictionoftheinfluenceoftoolwearinfluencein sheetmetalblanking/punchingprocessesisinvestigatedinthis paperusingthefiniteelementmethod.Inordertosimulate accuratelysheetmetal—cuttingprocessesbyamaterialshearing mechanism,flfiniteelementmodelvalidforthenumerical descriptionofsuchprocesseshasbeendeveloped.Damageand 原文馆藏单位:机械中心图书馆 crackpropagationhasbeentakenintoaccountbymeansofan elastoplasticcon~itutivelawtostudytheeffectsofthe variationofprocessparametersonthegeometryofthesheared edgesandtheevolutionoftheforce-punchpenetration. Furthermore,anumericalinvestigationhasbeencarriedoutto studytheeffectOftoolwearonburrformation.During analysis.theinitiationofacrackisassumedtooccur, atany pointinthesheetmetalwherethedamagereachesacritical value.Crackpropagationissimulatedbythepropagationofa completelydamagedarea.Thisistakenintoaccountinthe finiteelementmodelbyadecreaseofthestiffhessofthe brokenelements. SY5O6-4-158 【篇名】Numericalsimulationoffineblankingprocessusing thecontinuumdamagemechanicapproach 【馆藏号】275679 【会议名】8thInternationalConferenceonSheetMetal (SheMet2oo0) 【会议日期】l7.19April2000 【页码】489.496 【语种】eng 【文摘】Inordertoaccuratelysimulatefineblankingprocesses, afiniteelementmodelvalidfornumericallydescribingofsuch operationshasbeendeveloped.Thenumericalsimulationof thedamageevolutionandcrackinitiationandpropagation havebeendescribedbymeansofcontinuumdamageapproach. Inthispaper,twomodelsfordamageaccumulationhasbeen implementedinthefiniteelementcodeABAQUSbymeansof theuserroutine(UMAT).TheLeMaitredamagemodeltaking intoaccounttheinfluenceoftriaxialityhasbeenimplemented aswellasdamagemodelaccumulation,basedontheRiceand Traceyductilefracturecriterionallowingforthedescriptionof theexponentialdependenceontriaxialitystressfield.The comparativestudybetweentheresultsobtainedbythe simulationsusingthedifferentdamagemodelsandthe experimentalones,showedthattheLeMaitredamagemodel (LMDmode1)isnotabletopredictthefracturepropagation pathinarealisticway.Onlytheexponentialdamageevolution givesgoodresults. 变薄拉深 SY506-4-l59 【篇名】Improvingworkabilityinironing 【刊号】770LD053 【刊名】JournalofMaterialsProcessingTechnology 【年卷期】2002.vo1.13O—l3l 【页码】64.68 【语种】eng 【文摘】111epaperdescribesthepossibilitiesofimproving workabilityinironingbyusingasuperimposedforceonthe cupedge.Equationsforstressesandforcesinironingwith superimposedforcewerederivedonthebasisofthe elementarytheoryofplasticity.Theincreaseinworkabilityis shownintheworkabilitydiagram.Thefiniteelementmethod (FEM)servedasthebasisforsimulatingtheproductionof cupswithnon-uniformwallthickness.TwOtheoreticalmodels wereverifiedbyexperiments. . 36— 《世界机电工程文摘》(英文) —二二 2005年(第四期)锻压工艺与设备双月刊 sY506-4一l6O 【篇名】Ironingoutthepouringoptions 【刊号】772B000l 【刊名】ModemCasting 【年卷期】2003.vo1.93,no.11 【页码】44.46 【语种】eng 【文摘】Whilepouringisoftenseenassimplythemethodof movingmoltenironfromthefumacetothemold,itsinfluence onironcastingproductioncostandqualitycanbegreat. Affectingsuchdiverseareasascastingyieldandsafetyand laborrequirements,theselectionofpouringtechniqueand technologyrequires~undfiestoconsidernumerousfactors, includingtypeandgradeofiron,castingweightstobepoured andthescaleofcastingproduction. SY506—4-l6l 【篇名】Lubricityofvolmilelubricantsinironingprocess 【刊号】780D0005.C 【刊名】日本楼械学会文集 【年卷期】2003.vo1.69.no.680 【页码】l094.1】0l 【语种】ipn 【文摘】Aseriesofexperimentsiscarriedoutusinga strip?ironingtypetribometertoinvestigatethepossibilityof thevolatilelubricantsasthelubricantforthebulkmetal formingprocess.ThetoolmaterialisthediesteelalloySKD l】,andtheworkpiecematerialisthemildsteelSPCE,the stainlesssteelSUS304andthealuminumalloyA3004, Experimentsshowthatthevolatilelubricantshavethesame lubricityasthegenerallyusedmineraloilwithlow.viscosity . iudgingfromthevalueoffrictioncoefficient,thesurface appearanceofironedworkpieceandthesurfacedamageofthe die.Thevolatilelubricantscanbeappliedtotheironing processwith40%reductioninthicknesswhentheworkpiece surfacetextureandthecompatibilitybetweenthedieand workpieceareproperlyconsidered. SY506-4-l62 【篇名】Preventionofseizurebynitridecoatinginmulti?stage deepdrawingofpuretitaniumsheets 【刊号】773D0055 【刊名】塑性加工 【年卷期】2003,vo1.44,no.1 【页码】55.59 【语种】pn 【文摘】Seizinginmulti—stagedeepdrawingprocessesofpure titaniumsheetswaspreventedbynitridecoating.Thenitride coatingwasperformedbyannealingpuretitaniumsheetsin nitrogenatmosphere.Thetitaniumsubstratewasnotindirect contactwiththedieduringtheformingduetotheexistenceof thenitridelayer.Theeffectsofdiematerialsandlubricantson theoccurrenceofseizureinmulti.stagedeepdrawingwere examined.Itwasfoundthatthenitridecoatingiseffectivein preventingtheseizureinmulti-stagedeepdrawingprocesses ofpuretitaniumsheets.Inaddition,thesurfaceroughnessof thesidewallofdrawntitaniumcupswasimprovedbyadeep drawingandironingprocessinthefinalstageofforming. 原文馆藏单位:机械中心图书馆 SY5O6.4-l63 【篇名】ReachingoutatIBS 【刊号】73OB0062 【刊名】ApplianceManufacturer 【年卷期】20o3,vo1.5l,no.3 【页码】l】.14.15 【语种】eng 【文摘】Attention-grabbinginnovationwasthestrategyof appliancemakersexhibitingattheInternationalBuilders? ShowinLasVegasinJanuary.Wbrandextensions.more hi曲-techfeatures,largercapacities,fleshstyling.andnew colors,it’SclearthattheOEMsarepullingoutallthestopsto reachouttotoday’sappliancecustomersandpullthemin.One eye-catchingdisplaywasWhirlpool’sFamilyStudio,which thecompanydescribesas”acompletefabric.careandfamily activitycenterfortoday’shome.’’Inadditiontodisplayingthe Duetwasher/laundrypairandthePersonalValetrevitalizing system,theconceptexhibitalsoshowedhowWhirlpoolis extendingitsbrandnameintonewproductcategories.The FamilyStudioincludedtheDryAireDryingCabinet, for dryingitemssuchaswoolsweaters;theSinkSpaJettedSink, designedtowashdelicateitemsnormallyhand.washed;and theImpressIroningStation. SY5O6—4一l64 【篇名】Simultaneousfinishingofinnerandoutersurfacesof tubebyplanetaryballrollingprocess 【刊号】780DO005.C 【刊名】日本机械学会论文集,C辑 【年卷期】2002,vo1.68,no.674 【页码】3076.308l 【语种1ipn 【文摘】Previouslyproposed”PlanetaryConicalRolling”- (PCR)isanewironingprocesscarriedonbetweenacylinder dieandrollerssupportedbyinnerrace.Excellentfeaturesof PCRsuchasextremelyhighthicknessreduction,mirror finishingofoutertubesurface,noslidingbetweentooland material,supplementofhighpressureintheradialdirection weredemonstrated.Itwasalsoreportedthatthisprocesscould beappliedtopressureweldingandthreadforming.However, innersurfaceoftubeafterPCRwasconsiderablyrough becauseofindentationofrolleredgeonthemateria1.Inorder toovercomethisdefect,”Planetaryballrolling”.inwhich rollersinPCRtoolswerereplacedwithbalIs.isproposed. PerformanceofPBRwascomparedwithPCRbytheuseof aluminumalloytubes.Asaresult.roughnessofinnersurface ofthetubewasextremelyimprovedbyPBR.Influenceofball diameteronforminglimitandsurfacefinishingwas investigated.Itwasfoundthatforminglimitwasassumedwith maximumcontactangleand1argebal1diameterwas advantageous.Additionally,largeballwasalsoeffectiveto reducesurfaceroughnessofboththeinnerandoutersidesof tube.Thiswasduetoenlargementofdeformationzone,which causedsumcientdefolinationonoutertubesurfaceand reducedpillingupontheinnertubesurface.Obtainedtubehad goodqualityandsimultaneousfinishingofinnerandouter surfacesofatubebyPBRwasdemonstrated. . 37- 《世界机电工程文摘》(英文)2005年(第四期)锻压工艺与设备双月 刊 SY506—4一l65 【篇名】Timetocell?:toutedasthegreatsaviourofhuman mobili?.fuel—eellpowertrainshavemanyinemcienciesthat needironingoutbeforetheycanrealisticallydominatesales charts 【刊号】873C0l38 【刊名1EngineTechnologyInternational 【年卷期】2002,no.4 【页码】66.68 【语种】eng 【文摘】Overthepastdecade,thefuelcellhasbeenrecognized asafutureoptionformanyenergy—usingsystems.Formotor vehicles,PEMfuelcellsofrerpromisingsolutionstoconcerns aboutairpollution,oildependence,andglobalwarming,while providingampleonboardelectricitytomeetgrowingcustomer needs.DramaticR&Dprogresshasbeenmade,yielding hydrogen.fueledstackdesignsthataresuitableformass production,butthere’salongwaytogo. 深拉深 SY506—4一l66 【篇名】Formabilityanalysisofextra?deepdrawingsteel 【刊号】770LD053 【刊名1JournalofMaterialsProcessingTechnology 【年卷期】2002,vo1.130.13l 【页码】31.4l 【语种】eng 【文摘】lnthepresentwork,formabilityoffivesheetsof aluminum-killedextra?deepdrawing(EDD)lowcarbonsteel sheets(withawidevariationinthickness)hasbeen characterized.Forminglimitdiagrams(FLDs)havebeen determinedexperimentallybyconductingpunch-stretching experimentsusingsuitablydesignedandfabricatedtools. Formability,observedfromFLDs,hasbeencorrelatedwith microstmcture,mechanicalpropertiesandformability parameterslikestrainhardeningcoefficient(n)andnormal anisotropy(r{top}?).Thestraindistributioninthematerial duringpunch—stretchingunderdifferentstatesofstrainhas beenstudied.Fromtheexperimentalresults,ithasbeenfound thatfourofthefivesheetshaveafavorablegrainsizeand mechanicalpropertiestomeettherequirementsofgood formability.Thesuitabilityofthesesheetsforcritical deep—drawingapplicationshasbeenexaminedintermsofthe levelandrangeofcriticalstrainsintheFLD.Theseresults correlatedwellwithformabilityparameters.Earingtendency duringdrawingisexpectedtobehighforonesheetduetoits highplanaranisotropy.TheleveloftheFLDincreased significantlywiththesheetthickness.Theeffectofnandron thestraindistributioncharacteristicshasbeenanalyzed. SY506-4一l67 【篇名】Formabilityenhancementinmagnesiumalloydeep drawingbylocalheatingandcoolingtechnique 【刊号】770LD053 【刊名】JournalofMaterialsProcessingTechnology 【年卷期】2003,vo1.143.144 【页码】6l2-6l5 【语种】eng 原文馆藏单位:机械中心图书馆 【文摘】Anewdeepdrawingprocesswithalocalheatingand coolingtechniquewasdevelopedbecausesheetformingofa magnesiumalloyisverydimcultbytheconventionalmethod atroomtemperature.Theobjectiveofthisstudyistoclarify howmuchtheformabilityofamagnesiumalloysheetcanbe enhancedbyusingthenewtechnique.Amagnesiumalloy sheetof0.5mmthicknesswasused.Deepdrawing experimentswereconductedatatemperatureofabout400? f0rtheblankanddeepdrawingtool(holderanddie)andata punchspeedof200mm/min.Asaresult,thedrawncupheight Ofll5mmwasachievedbyusingboththelocalheatingand coolingtechniqueandthevariableblankholderpressure(BH technique.Itisconfirmedthatthedeepdrawingperformance ofthemagnesiumalloycanbeconsiderablyenhancedunder theappropriatetemperaturedistributionforthelocalheating andcoolingtechniqueandwithvariableBHPcontro1. SY506-4-168 【篇名】Formabilityenhancementinmagnesiumalloy stampingusingalocalheatingandcoolingtechnique:circular cupdeepdrawingprocess 【刊号】77OLDO53? 【刊名】JournalofMaterialsProcessingTechnology 【年卷期】2003,vo1.142,no.3 【页码】609.6l3 【语种】eng 【文摘】Anewdeepdrawingprocesswithalocalizedheating andcoolingtechniquewasdevelopedtoimprovesheet formingofamagnesiumalloywhichisverydifficultby conventionalmethodsatroomtemperature.Theobjectiveof thisstudyistoclarifyhowmuchtheformabilityofa magnesiumalloysheetcanbeenhancedbyusingthenew technique.Amagnesiumalloysheetof0.5mmthicknesswas used.Deepdrawingexperimentswereconductedata temperatureofabout400”12fortheblankanddeepdrawing tool(holderanddie)andatapunchspeedof200mm/min.As aresult.thedrawncupheightofll5mmwasachievedby usingboththelocalheatingandcoolingtechniqueandthe variableblankholderpressure(BHP)technique.Itwas confirmedthatthedeepdrawingperformanceofthe magnesiumalloycouldbeconsiderablyenhancedusingthe appropriatetemperaturedistributionforthelocalheatingand coolingtechniqueandwithvariableBHPcontro1. SY506-4-169 【篇名1Formabilityimprovementofdeepdrawingfor automobileparts 【馆藏号】SAE2003 【会议名】SAE2003WorldCongress(SP-1740) 【会议日期】March3-6,2003 【页码1gPP 【语种】eng 【文摘】Inthispaper,thedeepdrawingofsheetmetalforming methodisveryusefulinindustrialfieldbecauseofits efficiency.Inordertoobtaintheoptimalproductsindeep drawingprocess,thedeepdrawingisaffectedbymanyprocess variables,suchasblankshapes,profileradiiofpunchanddie, formabilityofmaterialsandsoon.Especially,blankshapeisa veryimportantformabilityfactor.Inthisstudy,inorderto . 38.