精密连接技术及其在-航空航天工业中的应用.ppt

精密连接技术及其在-航空航天工业中的应用.ppt

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精密连接技术及其在航空航天工业中的应用PrecisionJoiningTechniqueanditsPrecisionJoiningTechniqueanditsApplicationinAerospaceIndustryApplicationinAerospaceIndustryShanghaiJiaoTongUniversityShanghaiJiaoTongUniversityMaterialsScienceandEngineeringCollegeMaterialsScienceandEngineeringCollegeSJTUWeldingEngineeringInstituteSJTUWeldingEngineeringInstituteContentsIntroductionIntroductionConventionalweldingtechniqueConventionalweldingtechniquePrecisionjoiningtechniquePrecisionjoiningtechniqueDifferencebetweenprecisionjoiningandconventionalDifferencebetweenprecisionjoiningandconventionalweldingtechniqueweldingtechniqueMainapplicationareasofprecisionjoiningtechniqueMainapplicationareasofprecisionjoiningtechniqueSomefrequentlyusedtechniquesforprecisionjoiningSomefrequentlyusedtechniquesforprecisionjoiningMaterialinaerospaceandtheirjoiningfeaturesMaterialinaerospaceandtheirjoiningfeaturesApplicationofprecisionjoiningtechniqueinaerospaceApplicationofprecisionjoiningtechniqueinaerospaceApplicationexamples:

ElectronicBeamBrazingforpartsApplicationexamples:

ElectronicBeamBrazingforpartsinaerospaceinaerospaceApplicationexamples:

LaserweldingforpartsinaerospaceApplicationexamples:

LaserweldingforpartsinaerospaceConclusionandprospectConclusionandprospectIntroductionIntroductionThejoiningtechniqueThejoiningtechniqueisanindispensableprocessingmeansinmodernisanindispensableprocessingmeansinmodernmanufacturing.Itusesthemechanical,chemicalmethods,suchaspartialmanufacturing.Itusesthemechanical,chemicalmethods,suchaspartialheatingorwithpressure,tojointhetwopartsormaterials.Commonlyheatingorwithpressure,tojointhetwopartsormaterials.Commonlytherearenon-permanentandpermanentjoint:

therearenon-permanentandpermanentjoint:

Non-permanentjoint:

Non-permanentjoint:

thejointpartcanbemovedorthejointpartcanbemovedordisdis-assembled-assembled，e.g.hingejoint,chainjoint,screwjoint,etc.e.g.hingejoint,chainjoint,screwjoint,etc.Permanentjoint:

Permanentjoint:

thejointcannotbemovedordisassembledexceptthejointcannotbemovedordisassembledexceptdestruction,e.g.gluejoint,rivetjointdestruction,e.g.gluejoint,rivetjoint、allkindsofweldingjoints,allkindsofweldingjoints,etc.（Hereonlytheweldingjointsandtheirweldingtechniquewillbeetc.（Hereonlytheweldingjointsandtheirweldingtechniquewillbediscussed.）discussed.）WeldingtechniqueWeldingtechniquegenerallyusessomekindofheatsourcetopartiallygenerallyusessomekindofheatsourcetopartiallyheatmaterial（especiallymetal）underthecertainprotectivecondition,heatmaterial（especiallymetal）underthecertainprotectivecondition,sometimeswithcertainpressure,toformapermanentweldingjoint,sometimeswithcertainpressure,toformapermanentweldingjoint,whichmeanstheatomicormolecularconnectionbetweenthetwowhichmeanstheatomicormolecularconnectionbetweenthetwomaterialsorparts.materialsorparts.IntroductionIntroductionWeldingtechniquesareincreasinglyappliedinmanufacturingofproductsthatWeldingtechniquesareincreasinglyappliedinmanufacturingofproductsthatconsistofdifferentpartswithdifferentmaterials,shapes,structuresandconsistofdifferentpartswithdifferentmaterials,shapes,structuresandfunctions,toformacomplexentirebody.Thustheworkingprocedureofthefunctions,toformacomplexentirebody.Thustheworkingprocedureoftheentiredentiredworkpiececanbegreatlysimplified,thematerialcanbesavedandtheworkpiececanbegreatlysimplified,thematerialcanbesavedandtheproductionefficiencycanbeincreased.productionefficiencycanbeincreased.TheseekingforhighqualityandlowcostofproductistheimportantstrategyTheseekingforhighqualityandlowcostofproductistheimportantstrategytogetvictoryinthemarketcompetitionformostenterprisestoday.Andthetogetvictoryinthemarketcompetitionformostenterprisestoday.Andthehighqualityofproductisgenerallyguaranteedbyreasonableproductdesign,highqualityofproductisgenerallyguaranteedbyreasonableproductdesign,reliableprocessingprecisionreliableprocessingprecision,andeffectiveinspectionmethod.,andeffectiveinspectionmethod.Asanimportantprocessingmeansinmanufacturingofmodernproduct,theAsanimportantprocessingmeansinmanufacturingofmodernproduct,thejoiningtechniqueanditsprecisionincreasinglygetextensiveattention.Withjoiningtechniqueanditsprecisionincreasinglygetextensiveattention.Withdevelopmentoftechnology,theprecisionjoiningisbecominganeffectivewaydevelopmentoftechnology,theprecisionjoiningisbecominganeffectivewaytoreducefollowedworkingprocedures,todecreasecost,andtoimprovetoreducefollowedworkingprocedures,todecreasecos