本科毕业设计论文刹车保持架冲压成形工艺及模具设计外文翻译.docx

本科毕业设计论文刹车保持架冲压成形工艺及模具设计外文翻译.docx

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本科毕业设计论文刹车保持架冲压成形工艺及模具设计外文翻译

英文

Brakemaintainsastampingformingtechnologyanddiedesign

Brakecage,partiallywrappedallorpartoftherollbody,andwiththemovementofthebearingparts,usedtoisolaterollingbody,usuallyalsoguideandkeepitwithinthebearingroller.

Retainersmaterial:

rollingbearingatwork,heatandwearcausedbyslidingfrictionbearing,especiallyundertheconditionofhightemperatureoperation,inertialcentrifugalforceroleexacerbatedthefriction,wearandheat,bracketwillbecausedseriousburnsorrupture,thebearingcanworknormally.Requestretainersmaterial,therefore,besideshaveacertainstrength,mustalsohavegoodthermalconductivity,smallfrictioncoefficient,goodwearresistance,impacttoughness,densityissmallandlinearexpansioncoefficientandphaseclosetotheroller.Inaddition,thepresscageneedtoundergocomplicatedstampingdeformation,alsorequiresamaterialhasgoodprocessingperformance.

First，Functionandclassificationofbearingcage

Keepbearingframeisoneofthemainparts,keeptheaircraftintherollingbearinghasfourbasicfunctions:

1.Separationroller;2.Willkeeprollingelementitselforkeepitwitharingtogether;3.Guidanceontherighttrackrollerrolling;4.Theorientationofrollingbody,reducethefriction.Accordingtothemanufacturingprocessandmaterialsusedincagecanbedividedinto:

stampingatlowandmediumcarbonsteelasthematerialofthecage;Withhighstrengthcopperalloy（leadbrass,nickel,siliconbronze,etc.）,zincalloy,ductilecastironasthematerialofthealloysolidcage;Polyamideresinasmaterialofengineeringplasticcage;Phenoliclaminatedclothtubeasmaterialentitiesphenolicbakeliteretainer.Includingpunchingcagewithhighproductionefficiency,qualitativelight,intensityisgood,widecoverageandwidelyused.Retainersarebasicrequirementsofthedesigninacertainspaceandstructurestrengthmaximumload-bearingloadandmeetthebearingontherotatingprecisionandspeedrequirements,accordingtotheworkingconditionoftheuseofbearingsonthehostandguideclearancerequirements,determinetheinnerandouterdiameterorrollerguideway,andthendeterminethestructureandmainparameters.Rollingbearingatwork,heatandwearcausedbyslidingfrictionbearing,especiallyundertheconditionofhighspeed,duetotheroleofcentrifugalforce,inertiaforce,speeduptheinternalrollingelementbearings,innerandouterringandcagecollision,frictionandwearwithfever,bracketwillbecausedseriousburnsandfracture,thebearingcan'tnormaluse,keeptheframedamageinmakeupalargeproportionofbearingfailureforms,andinthecageinthecauseofthedamage,thecagematerialqualityisoneofthemainreasons.Therefore,bearingretainersrequirementsshouldhavegoodmechanicalstrength;Thestabilityofsize;Goodplasticityandmachinabilityaspectsofperformance.Becausemaintainsauniquewayofmachiningprocessorofthelimitations,andconsideringtheforcebearing,lubrication,thespeed,temperatureandsoonvariousaspectsfactorandtheinfluenceofthemarketforbearinghighspeed,highprecision,overload,longlifeandlownoiserequirements,bearingcagetechnologycontinuousimprovementanddevelopmenthasbecomeinevitable.

Second,theevolvementanddevelopmentofpunchingcagestructure

Inherentstructureimprovementofrollingbearing,inadditiontoincreasethenumberandsizeroller,mostlyduetothebearingcagestructureimprovement.Punchingcage,forexample,therearedozensoftypesofstructures.Itscommonorgenericinthepressingcagestructuretypeandstructureevolvementanddevelopmentoftheintroductionisasfollows:

1.Deepgrooveballbearingcage;Itscagetypewithleadguardribboncage;\"S\"shapecage;Ribboncage;Crownretainer;Withclawribboncage;One-wayclearanceribboncage;DoublewaveformcageKvalues.Thetopfivekindsofstructureareoldtypecagestructure.One-waywaveclearanceformcageandthedoubleKvalueofthewaveformcage,greasegrooveribboncagealldevelopmentortoreducenoise,exploreanewtypeofcagestructure,atthesametimecanimprovethelubricatingabilityofcage,areofgreathelptoimprovethespeedofthebearing.Abroadcentripetalballbearingcagepocketholewitharoundoroval,rotationalflexibilitygood,clearancerange13to25microns,tendtowidenthecagestructure,（widthratioofballdiameterof0.45to0.48）,highstrength,goodrigidity,ballpocketholeRlightbeltround,full,platformparalleldifferencebetweensmall,USEStherivetwithtaperedinterference,highpositioningaccuracy,suitableforhighefficiencyautomaticassembly,aftertheriveting,rotationalflexibilityisgood,lownoise.2.Self-aligningballbearingcage,itsstructureischrysanthemumformcage;Kwaiformcage;Elephantnosecage.Thestampingmaintainsabasicnotmuchchangeinthestructure,butthestampingmouldmanufacturingcomplex,productsizeisdifficulttoguaranteeandinspection,astheengineeringplasticcagestrengthandthecontinuousimprovementofhightemperatureresistantperformance,hasbeenthetrendofgraduallyreplaced.

Third，thenatureofthecageandfunction

1:

onthebasisofguaranteethestrength,canmaketherollingelementbearingshaveincreasedinquantityorgeometrysize,inordertoimprovethebearingcapacityandservicelife.2:

havehastheabilitytoimprovetheselflubricatingbearing,atthesametimecanreducethenoise.Meettherequirementsofbearingtoimprovespeedandreducenoise.3:

havesaverawmaterialsandreducetheimpactonthesurroundingenvironment.ImprovematerialutilizationandsaverawmaterialisthetrendofTheTimes,especiallywhenlimitedresourcesincreasinglytenseofcoppermaterial,withsteelandcopper,plasticgenerationthatistokeeptheframestructureplayedasignificantroleinimprovingandalternative.Intermsofenvironment,reducepollution,increasinglybecomethefocusofenterprisesandsociety.4:

improvethesurfacehardnessandretainerslubricatingabilitywillbecomethedevelopmentdirectionofnewcagestructure.Punchingcageatpresent,undertheconditionofenvironmentalprotectionofsurfaceshotblasting,finishing,blueandotherphysical,chemicalprocessing,toreducestressincage,improvethesurfaceroughness,lubricationabilityhasplayedapositiverole.Partstructure,suchasshortconical,cylindricalandsphericalrollerbearings,needlerollerbearingcagesurfacecarburizing,carbonitriding,orbracketwillbesoftnitridingtreatmentistoimprovethemechanicalstrengthandresistancetowear,prolongingthelifeofthecageplayakeyrole.Anynewthinghasitsoccurrenceanddevelopmentprocess,structureimprovementandadvancementofthecageisnotexceptionalalso,technologyprogressanddevelopmentistheeternalthemeinbearingindustry.Stampingmaintainsaproductionandprocessingofthenewstructurenotonlyhavetechnicaldifficulties,thereisalsohaveabilitytoacceptthemarketproblem.However,improvingthestructureofthecageaslongasmeettheincreasedspeed,load,bearinglifeandreducenoise,saverawmaterials,havedemonstratedthedevelopmentoftheabsolutetruth,thereisthesurvivalanddevelopmentspace,itwillbeacceptedbythemarket,soastooccupythemarket,bringmorerichlyrewardedforenterprisesandusers.

Fourth，maintainsaworkefficiencyandapplication

punchingcagemanufacturecraftandtheequipmentabroadwavetypedeepgrooveballbearingcageismorespecializedandautomaticproduction,accordingtothesizeofthecagetherearetwomainmodeofproduction:

tinycageusingcoilonthesimplexpresscompoundonprogressivedie,moldingprocessfortheprecisiononthecoilstep5-7station,inturngraduallyundertheexpected,thecuttingring,forming,shaping,cutting,etc.Smallandmedium-sizedcageusingcoiledmaterialinhigh-speedtransferstampingpressesthewavetypecage,directlydowntheringmaterialfirst,andthenbyclampsteppingintomechanicalarmonbothsidesofeachstation,incompleteforming,punching,processessuchasplasticrivethole.Thecharacteristicsofthetwowaysarecomplexmould,manufacturingofhighprecision,longlife,safeandreliable,highproductionefficiency,suitableforlittlevarietyandmassproduction.Domesticseatypecageinthepastwithasinglepunchlistprocessproduction,andacageneed4-5unitspunch,dieandforthestaffoftheoperationtocomplete,simplemouldefficiencyislow,productioncostsarehigh.Inordertoimprovethequalityandefficiency,luoyangretainerfactorytooktheleadintheindustryinthedevelopmentofthemechanicalarmtypemulti-stationpunch,butduetothemoldandcontrolelementisnotpass,themachineprice,hasbeencannotgetagoodpromotionanduse.Shandongliaochengregionofsomecompanies,suchasgoldemperor,andonthisbasistodotheimprovement,withasinglepunchcoilautomaticflushring,onsinglearmupintothemouldagaintocompletetheotherprocessapproachtomakethemouldandmachinecostsbecomesimple,andcangreatlyimproveproductionefficiency,thusinliaochengmaintainsspecializingintheproductionareatogetapromotionandpopularization.Zhejiang,longinthe90stointroduceJapan'scoilautomaticproductionlineproducetinycage,throughtotheequipmentandmoldconstantlydigestionandabsorption,innovation,improvement,hasgreatlyreducedthecostofmouldandequipmentused,becomeoutstandingminiaturecageproduction.WuxiAnFengalsobyimitatingandexploration,successfullydevelopedhighspeedautomaticsteppingmodevolumes,