GearmanufacturingmethodsAbstractThispaperdealswiththeproductionprocessofthechainwheel.ItDetaileddescriptionofgearplanning,gearshaping,gearhobbing,gearbroaching,gearshaving,geargrinding,andintroducetheteethoftheproductionofavarietyofmethodsandtheusedoccasions.KeyWordsgearplanning,gearshaping,gearhobbing,gearbroaching,gearshaving,geargrinding,GearPlaningtheshapeofthespacebetweengearteethiscomplexandvarieswiththenumberofthegearaswellastoothmodule,somostgearmanufacturingmethodsgeneratethetoothflankinsteadofforming.Gearplaningusesareciprocatingracks,strokinginthedirectionofthehelixonagearwithagradualgenerationoffromastherackeffectivelyrollsroundthegearblank.Therackisrelievedoutofcontactforthereturnstrokeasinnormalshapingorplanning.Ithasthegreatadvantagethatthecuttingtoolsisasamplingrackwith(nearing)straightsidedteethwhichcaneasilybegroundaccurately.Thismethodislittleusedforhighproductionbecauseitisrelativelyslowinoperationduetothehightoolandslidemass；forjobbingpurposetheslowstrokingratedoesnotmatterandlowtoolcostgiveanadvantagewhereunusualsizesorprofilemodificationarerequired.Gearshapinggearshapingisinherentlysimilartogearplanningbutusesacircularcutterinsteadofarackandtheresultingreductioninthereciprocatinginertiaallowsmuchhigherstrokingspeed；moderngearshaperscuttingcargearscanrunat2000cuttingstrokesperminute.Theshapeofthecutterisroughlythesameasaninvolutegearbutthetipsoftheteetharerounded.Thegeneratingdrivebetweencutterandworkpiecedoesnotinvolvearackorleadscrewsinceonlycircularmotionisinvolvearackorleadscrewsinceonlycircularmotionisinvolved.Thetoolandworkpiecemovetangentiallytypically0.5mmforeachstrokeofthecutter.onthereturnstrokethecuttermustberetractedabout1mmtogiveclearanceotherwisetoolruboccursonthebackstrokeandfailureisrapid.Theadvantageofgearshapingarethatproductionratesarerelativelyhighandthatisthepossibletocutrightuptoashoulder.Unfortunately,forhelicalgears,ahelicalguideisrequiredtoimposearotationalmotiononthestrokingmotion；suchhelicalguidescannotbeproducedeasilyorcheaplysothemethodisonlysuitableforlongrunswithhelicalgearssincespecialcutterandguidesmustbemanufacturedforeacheachdifferenthelixangle.agreatadvantageofgearshapingisitsabilitytocutannulargearssuchasthoserequiredforlargeepicyclicdrives.GearHobbinggearhobbing,themostusedmetalcuttingmethod,usestherackgeneratingprinciplebutavoidsslowreciprocationbymountingmangy“racks”onarotatingcutter.the“racks”aredisplacedaxiallytofromagashedworm.Metalremovalratesarehighsincenoreciprocationofhoborworkpieceisrequiredandsocuttingspeeds40m/mincanbeusedforconventionalhobsandupto150m/minforcarbidehobs.Typicallywitha100mmdiameterhobtherotationspeedwillbe100rpmandsoatwentytoothworkpiecewillrotateat5rpm.Eachrevolutionoftheworkpiecewillcorrespondto0.75mmfeedsothehobwilladvancethroughtheworkpieceatabout4mmperminute.forcarproductionroughingmultiplestarthobscanbeusedwithcoarsefeedof3mmperrevolutionsothat100rpmonthecutter,atwo-starthoband20toothgearwillgiveafeedrateof30mm/minute.GearBroachingGearbroachingisnotusuallyusedforhelicalgearsbutisusedforinternalsourgears；theprincipleusedofbroachinginthecontextisforinternalsplineswhichcannoteasilydemadebyanyothermethod.Aswithallbroachingthemethodisonlyeconomicforlargequantitiessincesetupcostsarehigh.Gearbroachinggivehighaccuracyandlowsurfaceroughnessbutlikeallcuttingprocessesislimitedto“soft”materialswhichmustbesubsequentlycase-hardenedorhaettreated,givingdistortion.GearShavingGearshavingisusedasfinishingprocessesforgearsinthe“soft”state.Theobjectiveistoimprovesurfaceroughnessandprofilebymatingtheroughed-outgearwitha“cutter”whichwillimproveform.Agearshavingcutterlookslikeagearwhichhasextraclearanceattheroot(forswarfandcoolantremoval)andwhosetoothflankshavebeengroovedtogivecuttingedges.Itisrunmeshwiththeroughgearwithcrossedaxessothatthereisintheorypointcontactwitharelativevelocityalongtheteethgivingscrapingaction.Thegearshavingcuttertootharerelativelyflexibleinbendingandsowillonlyoperateeffectivelywhentheyareindoublecontactbetweentwogearteeth.Thegearandcutteroperateathighrotationspeedswithtraversingoftheworkfaceandabout100micronofmachinesarenotexpensivebutcutteraredelicateanddifficulttomanufactureGearGrindingGeargrindingisextremelyimportantbecauseitisthemainwayhardenedgearsaremachined.whenhighaccuracyisrequireditisnotsufficienttopre-correctforheattreatmentdistortionandgrindingisthennecessary.Thesimplestapproachtogearisformgrinding.Thewheelprofitisdressedaccuratelytoshaperequiredusingsinglepointdiamondswhicharecontrolledbytemplatescuttotheexactshaperequired.Theprofiledwheelisthenreciprocatedaxiallyalongthegear,whenonetoothshapehasbeenfinished,involvingtypically100micronmetalremoval,thegearisindexedtothenexttoothspace.Thismethodisfairlyslowbutgiveshighaccuracyconsistently.Settingupislengthybecausedifferentdressingtemplatesarechanged.Thefastestgeargrindingmethodusedtheprincipleasgearhobbingbutreplaceagashedandrelivedbyagrindingwheelwhichisarackinsection.Onlysinglestartwormarecutonthewheelbutgearrotationspeedsarehigh,100rpmtypically,soitisdifficulttodesignthedrivesystemtogiveaccuracyandrigidity.Accuracyoftheprocessisreasonablyhighalthoughthereisatendencyforwheelandworkpiecetodeflectvariablyduringgrindingsothewheelfrommayrequiredcompensationformachinedeflectioneffectes.Generationofawormshapeonthegrindingwheelisaslowprocesssinceadressingdiamondmustnotonlyformtherackprofilebuthastomoveaxiallyasthewheelrotates.Oncethewheelhasbeentrued,gearscanbegroundrapidlyuntilredressingisrequired.Thisisthemostpopularmethodforhighproductionrateswithsmallgears.鏈輪的制造方法摘要：這篇文章主要介紹了鏈輪的制造過程，詳細(xì)地?cái)⑹隽伺冽X，插齒，滾齒，拉齒，剃齒，磨齒；并且詳細(xì)地介紹了各種制作方法的利弊和運(yùn)用場合。關(guān)鍵詞：刨齒，插齒，滾齒，拉齒，剃齒，磨齒鏈輪齒間的空間形狀是復(fù)雜的,而且隨著齒輪的齒數(shù)和模數(shù)的不用而變化，因此大多數(shù)的鏈輪制造方法采用戰(zhàn)成尺郭而不是成形加工。刨齒是采用往復(fù)運(yùn)動(dòng)的齒條刀，當(dāng)齒條刀繞鏈輪胚料滾切并延其螺旋線方向運(yùn)動(dòng)時(shí)，齒形就會(huì)被逐漸展成。與普通的刨削加工相同，在回程中齒條刀與齒輪脫離接觸。這種加工方法最大的好處是，刀具為具有直線齒形或者接近于直線齒形的齒條，其齒面易于進(jìn)行精確加工。由于刀具和滑枕的質(zhì)量較大，造成