外文翻译--起重机金属结构.doc

附录AHoistcranemetalstructureFlows-likeinthehoistcrane,themajorityoftirehoistcrane,thecrawlercraneaswellasthepartialautohoistandspecial-purposeflows-likethehoistcrane,allinstallshasclothesrackthebracketarm,andthroughliftsusingitspeakblockandtackleinstallschangesliftsthesteelwireposition,thusrealizationheavyitemfluctuation；Againchangesitsheightofliftandtheworkingradiusthroughthechangeclothesrackbracketarmlengthandtheangleoftilt.Therefore,maintenanceclothesrackbracketarmincompletenessisextremelyimportant.Becausethehoistcranerisesandfallstheheavyitemworkcontentthemultiplicityandallkindsofworkenvironment,aswellasthehoistcranepilotoperationallevelhighlowstatusreason(hasalsocontraryoperation),thesecancreateclothesrackthebracketarmvaryingdegreedamage,evenfoldsthearmorthepersonnelcasualtyOnclothesrackthebracketarmsteelpipeisspeciallyintheweldingplace,veryeasytoappearthecrack；Thismustexaminecarefully,whennecessityappliesthemagnifyingglasscarefulobservation.Accordingtowemanyyearexperiences,isverysmallwhenthecraterplacecrack,mustcarryontheregulartrackinspection,gazesatthecrackcloselythedevelopmentchange,inordertotakethemeasurepromptly.Whencrackwidthasbigas1mmabove,shouldthepromptpatching.Theconcretemethodis,carriesonfirsttothecrackplaceoriginalcraterpolishes,removeshowmanytoregardthespecialdetailstodecide；Thencarriesonthepatching；Finallyrenovateswellthen.Whenthepitdepthachievedthesteelpipethearmthicksize,alsothepitdistortiondiameterachieveswhen25mm(diameterfor25mm)andastraightedge,ifthepitpositioninclothesrackonthebracketarmsteelpipesurface,thendeferstothemethodwhichshowninFigure1todeterminethepitthedepth,soonchoosesthegoodsteelballtoputinthepit,ifthesteelballapexupjustcouldwithrightangleunderalongthecontact,webepossibletoregardthesteelballbynowthediameterforthepitdepth.Ifthepitpositioninthesteelpipesideorunder,aftermayusethebuttertosticktofirstthesteelballcarriesonagainthesurvey.Tothiskindofmaintenancedamage,theavailablegeneralmaterialqualityandtheoriginalsteelpipesamesteelpipeweldingreinforcement,namelytakessectionofsteelpipestodivideintoalongthemiddlelinetwohalf,buildsitsnosetheincline,hasexemptedthecratertobeverticaltoclothesrackthebracketarmsteelpipelengthdirection.Musttreatinfrontofweldingtheoriginalclothesrackbracketarmsteelpipeaboveweldsplacepaintspolishescleanlyfront,preparesforweldsWhenclothesrackthebracketarmsimplerootsteelpipesurfacedamagequiteisserious,shouldadoptitsdamageserioussectionofsteelpipesremoves,weldssectionofsteelpipesthemethodtocarryonprocessing,butmustaddonasectioninsidethesteelpipetostrengthenthesteelpipe.Frontinordertocausetoweldstrengthensthesteelpipetobeablethesmoothinsertiontoremoveinasectionofclothesrackbracketarmsteelpipe,strengthensthesteelpipetobesupposedtomakethesimilarlylongtwosections,andusesthethreadsuccessivelyandweldstwowaystocarryontheconnection.StrengthenssteelpipeL1andL2slengthmustasectionofshort20mmwhichremovescomparedtoclothesrackthebracketarmsteelpipe,alsoitsouterdiametershouldcomparedtoclothesrackbracketarmsteelpipeinsidediametersmall2040m,causetostrengthenthesteelpipebothtobepossibletomoveinclothesrackthebracketarmsteelpipeandnolongerbecomeslesscrowded.WillstrengthensteelpipeL1andL2firstinsertsclothesrackinseparatelythebracketarmsteelpipe,andwillusethemthescrewjointnottobeabletogetup,thenwillscrewtightcausestwoshoulderstodependonstrictly,willholdlooksstrengthensthesteelpipeaftertheposition,afterwilloccupyseparatelyitsscrewtoptheposition,separatelyandtwowillwelditsscrewtopplacethejailalreadytobepossible.Clothesrackthebracketarmsteelpipecratermustmaketheincline,whenthesteelpipespoolthreadperpendicularlineincludedanglefor1030between,likethedamageisthemulti-rootsteelpipe,shouldchoose10.Here,againearnestlysurveysclothesrackthebracketarmsteeltubeweldinggoodafteractualgapsize,andreferstotheshapewhichshowninFigure2,thenextsectionofsteeltubingmaterial,thebothsidesmake30inclines,cutsopentheweldingalongamonginclothesrackinthebracketarmsteelpipegap；Finishingtouch,paintsthenThistime,4steelpipesallmustweld,thereforeshoulddefertoFigure4requeststhevehicletomake4insidediameterstostrengthenthetube,aftertheinsidediameterstrengthenswallthicknesswhichthetubeturningremainstobesupposednottobebiggerthanclothesrackthebracketarmsteelpipethickness,themiddlecraterslopemustbeabletosatisfythestrengthofaweldtheneed.Atthesametime,theentireclothesrackbracketarm4steelpipeweldingpositionmuststagger,cannotintheidenticallateralsection,alsoeachsteelpipecraterinitsspoolthreadperpendicularlineincludedangleshouldbe10.Weldsrepairstimemustpayattention:Choosestheappropriateweldingrodandthematerialqualityreasonablestrengthensthesteelpipe；Alsomustpayattentiontotheambienttemperatureinthefallwinterseasonandweldtheexplanationlaborembryoclampingapparatusandsoontoentiretoweldrepairsthequalitytheinfluence,aswellastheweldingcircumferenceweldedjointdonothavetobeverticalwiththeoriginalsteelpipelengthdirection.Theweakclothesrackbracketarmgoesagainstthesheavepintlethewearingcapacitytosurpassthefullsizetime5%,namelyshouldreplace.Whenexamination,clothesrackthebracketarmwillplaceinabearingpoint,willcausetoliftthesteelwiretorelax,thehandwillpushthepulleyifwillrockthequantitytobeverybig,willhavetodismantlewiththerulersurveys,otherwiseaddedanoiltobepossible.Toconnectsthecrownarmfestival(lifthookblockandtackle),themiddlearmfestival(expandsandcontractscylinderfixedly),thefoundationarmfestival(withturnplate,amplitudecylinder,keepsoffcordpulleyaxis)andsoonplacetoselltheaxisalsotohavetoinspectfrequently.Whenitswearingcapacityachievedwhenfullsize5%,mustreplacepromptly.Wheninspection,alsoisplacesclothesrackthebracketarminabearingpoint,dismantlesone,inspectsone,againinstallsone,byrootinspection,untilcheckoff.Inspectsthelifthookthemarkandguardsagainstescapesinstallswhetherconformstotherequirement,flawsandsoonlifthookwhetherthereiscrack,stripping；Thelifthookcrosssectionwears,theapertureincrease,thetorsionaldeflection,whetherexceedstheallowedfigure；Thelifthookpateandthesuperficialwhetherthereiswearydistortion,thecrackanddothecorrelationselltheaxis,thewrapattritionsituation.Theinspectionsteelwirespecification,themodelandthepulleyreelmatcheswhetherconformstothedesignrequirement.Steelwiresteelwireattachmentsystemsandsoonfixedendclamp,lineanchor,agreementblockwhetherconformstotherequirement.Thesteelwireattrition,breaksthesilk,thekinking,compressing,thebend,breaksthestock,thecorrosionandsoonwhetherexceedstheallowedfigure.Brakeestablishment,brakepatternwhetherconformstothedesignrequirement,brakeflawsandsoontensionbar,springwhetherthereiswearydistortion,crack；Sellstheaxis,thespindle,thebrakepulley,thebrakeliningplatewhetherwearsexceedstheallowedfigure,hydraulicbrakewhetheroilleak；Appliesthebrakethegapadjustment,whetherbrakepowerconformstotherequirement.Thereelbody,doesthetubereasonwhetherthereisfatiguecracking,damageandsoonthesituations；Theropetroughandthetubewallwearswhetherexceedstheallowedfigure；Whetherthereelwheelrimhighlyanddoesthesteelwiretwinethelayertomatch；Guiderope,wirelineguideworkingconditionwhetherconformstotherequirement；Whetherthepulleyisequippedwithguardsagainstescapestheropetroughinstallment；Pulleyropetrough,wheelrimwhetherhasthecrack,theraggededges,theattritionexceedstheallowedfigureandsoontheconditions,thepulleyrotateswhethernimbly.Thespeedreducermoveswhenwhetherthereisfiercemet