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机电专业毕业设计相关文献翻译

GEARGEARGEARISRELYINGONTHETOOTHMESHINGTORQUEROTAVIRUSMECHANICALPARTSGEARWITHOTHERDENTATEMACHINERYPARTS,SUCHASAWORMGEAR,RACK,TRANSMISSION,WHICHCANREALIZECHANGEDTHEDIRECTIONOFROTATIONSPEEDANDTORQUE,CHANGETHEDIRECTIONOFMOVEMENTANDCHANGETHEMOVEMENTFORMS,ANDOTHERFUNCTIONSOWINGTOTHEHIGHTRANSMISSIONEFFICIENCY,ACCURATEANDADVANTAGESOFLARGERANGEOFPOWERTRANSMISSIONRATIO,GEARMECHANISMISWIDELYUSEDININDUSTRIALPRODUCTS,THEDESIGNANDMANUFACTURELEVELDIRECTLYAFFECTSTHEQUALITYOFINDUSTRIALPRODUCTSGEARTOOTHBUCKLEEACHGEARWILLDRIVETHEOTHERGEARSTOTRANSMITPOWERSEPARATETWOGEARS,CHAINSCANALSOBEAPPLIED,CATERPILLAR,ONBOTHSIDESOFTHEBELTTODRIVEGEARANDTRANSMISSIONPOWERBASICINTRODUCTIONINTHEAPPLICATIONOFTRANSMISSIONGEARAPPEAREDVERYEARLYMORETHANTHREEHUNDREDYEARSBC,THEANCIENTGREEKPHILOSOPHERARISTOTLEINTHEMECHANICALPROBLEMS,ITEXPOUNDSTHEBRONZEORIRONGEARTRANSMISSIONPROBLEMOFROTARYMOTIONINVENTEDINANCIENTCHINA,HASBEENAPPLIEDINTHEENTIREGEARTRAINHOWEVER,THEANCIENTGEARISMADEOFWOODORMETALMOULDS,CANONLYTRANSFERBETWEENSHAFTROTARYMOTION,CANNOTGUARANTEETHESTABILITYOFTRANSMISSION,THEBEARINGCAPACITYOFTHEGEARAREALSOSMALLACCORDINGTOHISTORICALRECORDS,IN400200BCINANCIENTCHINAHASALREADYSTARTEDTOUSEGEAR,SHANXIUNEARTHEDBRONZEGEARSINOURCOUNTRYISBYFARTHEOLDESTGEARHADBEENFOUND,ASAREFLECTIONOFANCIENTSCIENCEANDTECHNOLOGYACHIEVEMENTSOFTHISWORKISTOGEARMECHANISMASTHECOREMECHANISMTHE17THCENTURY,PEOPLESTARTEDTORESEARCH,CANBEDELIVEREDRIGHTTOOTHSHAPEOFTHEMOVEMENTTHE18THCENTURY,EUROPEAFTERTHEINDUSTRIALREVOLUTION,THEAPPLICATIONOFGEARTRANSMISSIONISINCREASINGDAYBYDAYWIDELY;FIRSTTHEDEVELOPMENTOFCYCLOIDALGEAR,THENTHEINVOLUTEGEAR,UNTILTHEBEGINNINGOFTHE20THCENTURY,INVOLUTEGEARHASSETUPAFILEINTHEAPPLICATIONASEARLYASIN1694,FRENCHSCHOLARPHILIPPEDELAHIREFORWARDINVOLUTETOOTHSHAPECURVECANBEUSEDASINTHEFIRSTPLACEIN1733,THEFRENCHMCAMUSPUTFORWARDTHECOMMONNORMALOFTOOTHCONTACTMUSTBEONTHECENTEROFTHENODEAAUXILIARYINSTANTANEOUSCENTERLINERESPECTIVELYALONGTHEBIGWHEELANDLITTLEWHEELOFTHEINSTANTANEOUSCENTERLINEPITCHFORPUREROLLING,ANDTHEAUXILIARYINSTANTANEOUSCENTERLINESOLIDCOUPLINGOFAUXILIARYTOOTHSHAPEONTHEBIGWHEELANDLITTLEWHEELENVELOPEFORMEDBYTWOTOOTHPROFILECURVEISCONJUGATEDTOEACHOTHER,THISISCAMUSTHEOREMITTAKESINTOACCOUNTTHETWOTOOTHSURFACEMESHINGSTATE;CLEARLYESTABLISHEDTHEMODERNCONCEPTABOUTCONTACTTRAJECTORYIN1765,SWISSLEULERINVOLUTEPROFILEANALYTICRESEARCHMATHEMATICALFOUNDATION,ILLUSTRATESAPAIROFMESHINGGEARS,THETOOTHPROFILECURVEOFTHERADIUSOFCURVATUREANDCURVATURECENTERPOSITIONLATER,BABIESFURTHERCOMPLETETHEMETHOD,ANDISNOWTHEEULETBABIESEQUATIONCANCONTRIBUTETOTHEAPPLICATIONOFINVOLUTETOOTHPROFILEISROTEFTWULLS,HEPUTFORWARDTHECENTREDISTANCECHANGEWHENINVOLUTEGEARHASTHEADVANTAGESOFTHEANGULARSPEEDRATIOUNCHANGEDIN1873,AGERMANENGINEERHOPPEISPUTFORWARD,WITHDIFFERENTNUMBEROFTEETHOFINVOLUTETOOTHPROFILEOFGEARINTHEPRESSUREANGLEISCHANGED,THUSLAIDTHEIDEOLOGICALBASISOFMODERNSHIFTGEARTHEENDOFTHE19THCENTURY,GENERATIVEPRINCIPLEOFGEARCUTTINGMETHODANDUSINGTHEPRINCIPLEOFGEARCUTTINGMACHINEANDCUTTINGTOOLAPPEARED,AFTERMAKINGTHEGEARMACHININGWITHTHEMORECOMPREHENSIVEMEANS,INVOLUTEPROFILESHOWSHIGHMOREOPTIMALSEXTEETHMESHASLONGASTHEGEARCUTTINGTOOLSFROMTHENORMALPOSITIONWHENMOVINGSLIGHTLY,CANUSETHESTANDARDCUTTERCUTOUTTHECORRESPONDINGSHIFTGEARSINMACHINETOOLIN1908,THESWISSMAAGDISPLACEMENTMETHODISSTUDIEDANDMANUFACTURINGEXPORTASPROCESSINGGEARSHAPER,LATER,THEBSS,AMERICANAGMA,GERMANYDINSUCCESSIVELYPUTFORWARDMANYKINDSOFMETHODTOCALCULATETHEDEFLECTIONOFGEARINORDERTOIMPROVETHESERVICELIFEOFTHEPOWERTRANSMISSIONGEARANDREDUCEITSSIZE,INADDITIONTOFROMMATERIAL,HEATTREATMENTANDSTRUCTUREIMPROVEMENT,THECIRCULARARCTOOTHPROFILEOFGEAROBTAINEDTHEDEVELOPMENTIN1907,THEBRITISHFRANKHUMPHRISPUBLISHEDACIRCULARARCTOOTHPROFILEATTHEEARLIESTIN1926,RUINATIVESERUESTWILDHABERAPATENTONTHEMETHODOFSURFACEARCTOOTHPROFILEHELICALGEARSIN1955,THESOVIETUNIONSMLNOVIKOVCOMPLETEDPRACTICALRESEARCHOFARCTOOTHPROFILEGEARANDGETTHEORDEROFLENININ1970,THEBRITISHROLHROYCECOMPANYENGINEERSRMSTUDERACHIEVEDDOUBLECIRCULARARCGEARPATENTINTHEUNITEDSTATESTHISKINDOFGEARISNOWINCREASINGLYATTENTIONBYPEOPLE,INTHEPRODUCTIONOFTHESHOWTHEBENEFITSGEARISTOBEABLETOMESHEACHOTHERTOOTHEDMACHINEPART,ITSAPPLICATIONINTHEFIELDOFMECHANICALTRANSMISSIONANDTHEWHOLEMACHINERYISEXTREMELYBROADMODERNGEARTECHNOLOGYHASREACHEDTHEMODULEOFGEARO004100MM;GEARDIAMETERBY1MM150M;ONTHETRANSMITTEDPOWERCANREACHHUNDREDSOFKILOWATTS;SPEEDUPTOHUNDREDSOFTHOUSANDSOFREVOLUTIONSPERMINUTE;THECIRCUMFERENCEOFTHEHIGHESTSPEEDOF300M/SECWITHTHEDEVELOPMENTOFPRODUCTION,THEGEAROPERATIONSTABILITY1674DANISHASTRONOMERROEMERFIRSTWITHOUTERCYCLOIDTOOTHPROFILECURVEISPUTFORWARD,INORDERTOGETSTABLERUNNINGGEARINTHE18THCENTURYINDUSTRIALREVOLUTION,GEARTECHNOLOGYGOTRAPIDDEVELOPMENT,PEOPLEHAVEMADEALOTOFRESEARCHONGEARIN1733THEFRENCHMATHEMATICIANCARDMETERSPUBLISHEDPROFILEMESHINGBASICLAWS;IN1765THESWISSMATHEMATICIANEULERPROPOSEDUSINGINVOLUTETOOTHPROFILECURVEEMERGEDINTHE19THCENTURYGEARHOBBINGMACHINEANDGEARSHAPER,SOLVESTHEPROBLEMOFMASSPRODUCTIONANDHIGHPRECISIONGEARIN1900,FORDFORGEARHOBBINGMACHINEISINSTALLEDONTHEDIFFERENTIALDEVICE,CANWORKOUTHELICALGEARONGEARHOBBINGMACHINE,GEARHOBBINGMACHINEROLLGRINDINGWHEELGAINEDPOPULARITY,GENERATINGMETHODPROCESSINGGEAROFTHELANDSLIDE,GEARINVOLUTEGEARBECOMETHEMOSTWIDELYUSEDIN1899,PULLUPTHEFIRSTIMPLEMENTATIONOFTHEPROJECTOFTHEMODIFIEDGEARMODIFIEDGEARCANNOTONLYAVOIDWHEELTOOTHROOTCUTTING,CANALSOGATHERTOGETHERWITHCENTERDISTANCEANDIMPROVETHEBEARINGCAPACITYOFTHEGEARIN1923AMERICASWILDERHUBBLEFIRSTPUTFORWARDTHECIRCULARARCTOOTHPROFILEOFGEAR,1955SUEHISCIRCULARARCGEARTOCARRIEDONTHETHOROUGHRESEARCH,CIRCULARARCGEARISAPPLIEDINTHEPRODUCTIONTHEGEARBEARINGCAPACITYANDEFFICIENCYISHIGHER,BUTITISNOTASGOODASINVOLUTEGEARTHATISEASYTOMANUFACTURE,ITREMAINSTOBEFURTHERIMPROVEDSTRUCTUREISINTRODUCEDUSUALLYHAVEATOOTH,TOOTH,ENDFACE,THEMETHODOFTHESURFACE,ADDENDUMCIRCLEANDDEDENDUMCIRCLECIRCLE,DIVIDINGCIRCLE1TOOTH,TOOTHFORSHORT,ISTHEGEAREVERYONEFORTHECONVEXPARTOFTHEMESH,THECONVEXPARTGENERALLYRADIATINGARRANGEMENT,PAIRINGTHETEETHOFGEARCONTACTEACHOTHER,CANMAKETHEGEARSMESHCONTINUOUSOPERATION;2THETOOTH,ISTHESPACEBETWEENTHETWOADJACENTTEETHONTHEGEARS;ENDFACEISCYLINDRICALORCYLINDRICALWORMGEAR,PLANEPERPENDICULARTOTHEAXISOFTHEGEARORWORM3METHOD,ISPERPENDICULARTOTHEPLANEOFTHEGEARSTOOTHLINE4ADDENDUMCIRCLE,ISREFERSTOTHETOOTHTOPROUND5DEDENDUMCIRCLE,REFERSTOTHEBOTTOMOFTHECHANNELINTHEROUND6BASECIRCLE,THEFORMATIONOFINVOLUTELINESFORPUREROLLINGOFROUND7DIVIDINGCIRCLE,ITISINTHEENDCALCULATETHEBENCHMARKCIRCULARGEARGEOMETRYSIZEGEARTOOTHPROFILECANBE,THEGEARSHAPE,TOOTHSHAPE,TOOTHSURFACEANDMANUFACTURINGMETHODSSUCHASCLASSIFICATIONGEARTOOTHPROFILEINCLUDINGTOOTHPROFILECURVE,PRESSUREANGLE,DEPTHANDDEFLECTIONINVOLUTEGEARISRELATIVELYEASYTOMANUFACTURE,SOTHEMODERNUSEOFGEARINVOLUTEGEARMAJORITY,WITHLESSCYCLOIDALGEARANDCIRCULARARCGEARAPPLICATIONSINTHEASPECTOFPRESSUREANGLE,THEBEARINGCAPACITYOFSMALLPRESSUREANGLEGEARSMALLER;ANDPRESSUREANGLEOFGEAR,THOUGHBEARINGCAPACITYISHIGHER,BUTUNDERTHESAMEINTHETRANSMISSIONTORQUEOFBEARINGTHELOADINCREASE,SOONLYFORSPECIALSITUATIONSANDGEARTOOTHDEPTHHASBEENSTANDARDIZED,GENERALLYADOPTHIGHSTANDARDTOOTHTHEADVANTAGEOFDEFLECTIONGEARISMORE,INALLKINDSOFMECHANICALEQUIPMENTINADDITION,THEGEARCANALSOACCORDINGTOITSSHAPECANBEDIVIDEDINTOCYLINDRICALGEAR,BEVELGEAR,THENONCIRCULARGEAR,RACK,WORM,WORMGEAR;ACCORDINGTOTHETOOTHLINESHAPECANBEDIVIDEDINTOSTRAIGHTGEARS,HELICALGEARS,HERRINGBONEGEAR,GEARCURVE;ACCORDINGTOTHETOOTHSSURFACEISDIVIDEDINTOEXTERNALGEARANDINTERNALGEAR;ACCORDINGTOTHEMANUFACTURINGMETHODCANBEDIVIDEDINTOCASTINGROLLINGGEAR,GEAR,GEARCUTTING,SINTEREDGEAR,ETCGEARMANUFACTURINGMATERIALSANDHEATTREATMENTPROCESSONTHEGEARBEARINGCAPACITYANDSIZEWEIGHTHASAGREATINFLUENCEUNTILTHE1950S,GEARUSECARBONSTEEL,THE60STOSWITCHTOALLOYSTEEL,ANDMULTIPURPOSESURFACEHARDENEDSTEELINTHE70SACCORDINGTOTHEHARDNESS,TOOTHSURFACECANBEDIVIDEDINTOSOFTANDHARDTOOTHFACETWOKINDSOFTOOTHSURFACESBEARINGCAPACITYISLOW,SOFTTOOTHSURFACEGEARMANUFACTURINGMOREEASILY,BUTGOODRUNNINGIN,MORERESTRICTIONSONTHESIZEANDWEIGHTWITHOUTSTRICTFORTRANSMISSION,ANDASMALLAMOUNTINTHEPRODUCTIONOFGENERALMACHINERYBECAUSETHEGEARPAIRS,RELATIVELYHEAVYBURDENONSMALLWHEELS,SOINORDERTOMAKETHEWORKINGLIFEOFTHEGEARISROUGHLYEQUALSIZE,SMALLTOOTHSURFACEHARDNESSISHIGHERTHANTHEBIGWHEELHARDTOOTHSURFACEGEAROFHIGHBEARINGCAPACITY,ITISAFTERTHEGEARPRECISIONCUTTING,THENQUENCHING,SURFACEHARDENINGORCARBURIZINGANDQUENCHINGTREATMENT,INORDERTOIMPROVETHEHARDNESSBUT,INTHEHEATTREATMENTDEFORMATIONOFGEARWILLINEVITABLYPRODUCE,SOAFTERHEATTREATMENTMUSTGRINDORFINECUTTING,GRINDING,TOELIMINATETHEERRORBECAUSEOFTHEDEFORMATIONANDIMPROVETHEPRECISIONOFGEARMATERIALCOMPOSITIONCOMMONLYUSEDSTEELMANUFACTURINGGEARQUENCHEDANDTEMPEREDSTEEL,HARDENEDSTEEL,CARBURIZINGANDQUENCHINGSTEELANDNITRIDINGSTEELSLIGHTLYLOWERTHANTHESTRENGTHOFTHECASTSTEELFORGINGSTEEL,USEDTOSIZETHELARGERGEAR;MECHANICALPROPERTIESOFGRAYCASTIRONISBAD,CANBEUSEDFORTHEOPENGEARTRANSMISSIONINLIGHTLOAD;NODULARCASTIRONCANPARTIALLYREPLACESTEELMANUFACTURINGGEAR;PLASTICGEARISUSEDFORLIGHTLOADANDMOREREQUIREMENTSOFLOWNOISE,ANDITSGEARPAIRS,THETHERMALCONDUCTIVITYISCOMMONLYUSEDINSTEELGEARSFUTUREGEARISOVERLOADED,HIGHSPEED,HIGHPRECISIONANDHIGHEFFICIENCY,SUCHASDIRECTION,ANDSTRIVETOSMALLSIZE,LIGHTWEIGHT,LONGSERVICELIFEANDECONOMICANDRELIABLEANDGEARTHEORYANDTHEDEVELOPMENTOFTHEMANUFACTURINGPROCESSWILLBEFURTHERSTUDYTHEMECHANISMFORTOOTHDAMAGE,THISISTOESTABLISHARELIABLEBASISFORTHESTRENGTHCALCULATIONMETHOD,ISTOIMPROVETHEGEARBEARINGCAPACITYANDEXTENDTHELIFEOFTHEGEARTHEORETICALFOUNDATION;DEVELOPMENTREPRESENTEDBYCIRCULARARCTOOTHPROFILEOFTHENEWTOOTHFORM;STUDYOFNEWGEARMATERIALANDTHENEWPROCESSTOMAKEGEAR;STUDYOFTHEELASTICDEFORMATIONOFGEAR,MANUFACTURINGANDINSTALLATIONERRORANDTHEDISTRIBUTIONOFTEMPERATUREFIELD,TOCARRYONTHEMODIFICATIONOFGEARTOOTH,SOASTOIMPROVEGEARRUNNINGSTABILITY,ANDINCREASETHECONTACTAREAOFTOOTH,WHENLOADEDWITHSOASTOIMPROVETHEBEARINGCAPACITYOFTHEGEARFRICTIONANDLUBRICATIONTHEORYISABASICWORKINGEARRESEARCHANDLUBRICATIONTECHNOLOGY,RESEARCHONELASTICHYDRODYNAMICPRESSURELUBRICATIONTHEORY,PROMOTINGTHESYNTHETICLUBRICATINGOILANDPROPERLYJOINEXTREMEPRESSUREADDITIVESINTHEOIL,NOTONLYCANIMPROVETHEBEARINGCAPACITYOFTOOTHSURFACE,ANDALSOCANIMPROVETHETRANSMISSIONEFFICIENCY1,THETOOTHSURFACEABRASIONFOROPENGEARTRAN

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