aps有用machine design1spline花鍵bolt螺栓pin銷釘worm蝸桿

1，Thecoursebrieflyintroducesthebasicknowledgeaboutthedesignofawholemachine,itmainlydiscussesthebasicdesigntheoriesandmethodsofcommonpartssuchaskey,spline(花動軸承）andsoon.4,Themainprocessofmechanicalbasictheoreticalanalysisaboutthemechanism'smovementandthedynamicthecalculationofparts’workingabilityand4)Drawassemblydrawingandparts finishtechnicaldocumentofDesignprinciple1)Strengthprinciple:thestressthatpartsisactedonshouldnotexcesswhatitispermitted.2)Rigidityprinciple3)workinglifeprinciple4)stabilityprinciple5)Reliability5，Thepartsofenundervaryingstressbecomeinvalidatedbrieflybecauseof6,Typesofscrewthreadboltcoupling(普通螺Ordinarybolt和鉸制孔用螺栓articulationholebolt)4）set Forcesanalysisofboltcoupling1)transverseforce2)torque3)longitudinalload縱向載荷z---i---thenumberofcontactsurfacesks---Anti-slipsafetycoefficient，通常取 sFFKF （set s

frjj1鉸制孔螺栓聯(lián)接：只受橫向外載荷作用F=F＝F/z（螺栓組的話F Trmax2 QT r2rjj3)upsettingmomentcondition(傾覆力矩Key:generalflatkey,woodruffkey,wedgekey,spline(undertakingaverageforces,lowerstressconcentration,betterorientation.).Pin:圓柱銷roundpin,taper其中電阻焊：點Spot,Seam,Butt,ProjectionWelding減速傳動（speedreducingtransmission)i>1，增速傳動(speedincreasingtransmission)a).ThecharactersofGeartransmission:1)highefficiency2)compactstructure3)stableb)Formsofinvalidation:輪齒折斷(gearbreakage)；齒面疲勞點蝕(toothsurfacefatiguepitting)，齒面磨粒磨損(surfaceabransivewear)，齒面膠合(surfacescoring)，齒面塑性變形DesignprincipleensurethebendfatigueStrengthofgearfootandcontactfatiguestrengthofgearsurface Fromthestrengthandwearthesetworespects,usuallysmallgear’smaterialsshallbebetter,ormakeitstoothsurfacemore8，Wormgear(渦輪蝸桿副)：usuallywormisdrivingpart,wormwheelisdrivenpartFormsofinvalidation(verylikegeardrive)：surfacescoring,pitting,wearandtooth Pittingandscoringhappensmostfrequently。materialofworm:碳鋼&alloysteel(合金鋼wormwheel：usebronzeorcastirontomakegearring(齒圈

d2cosn

(T2---torque(N.mm)αn---normalpressuretgntgcoslaxandtightbelts(松緊邊);Pre-tightforce(預緊力);wrapangle(包角),coefficientofThedesignprincipalofstrap:undertheconditionthatthereisnoslide,enoughfatigueStrengthandservicelife.Ifoverload,slidewillhappen.

滑差率 v2v1100%vv2

10，shaftthematerialofshaftsisbrieflyandalloy套筒sleeve，T9.55106PWonlytorsionstrengthcondition:：WT

0.2d combinestrengthconditionoftorsionandbend:Equivalent(當量)bendingmoment：MvEquivalent

vW

(β：iftheaxisisshaft(空心軸),βinnerdiameter/outside

accordingtofatiguestrengthconditiontoaccuratelyAccordingtothealternatingstressstrengththeorytheaxis’sfatiguesafetycoefficientSshouldbecheckedasthisformular:(根據(jù)交變應力強度理論，軸的疲勞安全系數(shù)S的SSSSSσ、Sτ分別為只考慮彎矩、扭矩時的安全系數(shù)5,thedesignofshaft:figureoutthepowerP,rotatespeednandtorsionmomentT.ThenfigureouttheforceactingonGear:Ft=2T/d,FrandFa—firstlyfigureoutminimaldiameterofshaftBaseonthisdeterminethemodelofCoupling.(figureouttheaccurateloadingonShaft—draftthebendandtorsionmomentdiagramsofshaft—accordingtostrengthrequirement,modifyanddeterminethesizeofshaft（精structouterraceinnerrace，滾動體rollingelementcage向心軸承（radialbearing)推力軸承(thrust球軸承（deepgrooveballbearing、調心軸承(self-aniglingbearing)和向心推力軸承thefitbetweeninnerraceandshaftisbasicholeouterraceandsaddlebore(座孔isbasicshaftsystem5m/s Slidingbearing(highrotatespeed,highradialimpactandOneofthemsplitbearings