




已阅读5页,还剩2页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
英文原文BasicDynamicLoadRatingandLifeLifeRollingbearingswillsufferdamageduetovariouscausesduringservice.Damagesuchasabnormalwear,seizure,andcracksiscausedbyimproperuse,includingincorrectmounting,lackofoil,dustintrusionandsoon,andcanbeavoidedbyremedyingthesecauses.However,bearingswilleventuallybedamagedduetofatigue-flakingevenifusedproperly.Whenabearingrotatesunderload,theracewaysandtherollingelementsaresubjectedtorepeatedstress-esconcentratedonthepartclosetothesurface.Fatigue,therefore,occursinthesurfacelayer,producingdamageintheformofscaling.Thisiscalledflaking(spalling).Whenthisoccurs,thebearingcannolongerbeused.BearingLifeBearinglifeisdefinedasthetotalnumberofrevolutions(ortotalservicehoursataconstantrotationalspeed)beforeasignofthefirstflakingappearsontherollingsurfaceofracewayorrollingelements.However,evenwhenbearingsofthesamesize,structure,materialandheattreatmentaresubjectedtothesameconditions,thebearingliveswillshowvariation.Thisresultsfromthestatisticalnatureofthefatiguephenomenon.Inselectingabearing,itisincorrecttotakeanaver-agelifeforallbearingsasthedesignstandard.Itismorepracticaltoconsiderabearinglifethatisreliableforthegreaterproportionofbearingsused.Therefore,thebasicratinglifedefinedinthefollowingisused.BasicratinglifeThebasicratinglifeisdefinedasthetotalnumberofrevolutionsthat90%ofagroupofidenticalbearingscanbeoperatedindividuallyunderthesameconditionsfreefromanymaterialdamagecausedbyrollingfatigue.Forrotationataconstantrotationalspeed,thebasicratinglifecanberepresentedbythetotalservicehours.BasicdynamicloadratingThebasicdynamicloadratingisdefinedastheconstantradialload(inthecaseofradialbearings)ortheconstantaxialloadactingalongthebearingcentralaxis(inthecaseofthrustbearings)thatallowsabasicratinglifeof1,000,000revolutionsIKOCamFollowersarebearingswithastudincorporatingneedlerollersinathickwalledouterring.Thesebearingsaredesignedforouterringrotation,andhavesuperiorrotationalperformancewithasmallcoefficientoffrictionandhighloadcapacity.Asstudsalreadyhavethreadsorsteps,theyareeasytomount.CamFollowersarefollowerbearingsforcammechanismsandlinearmotionsandhavehighrigidityandhighaccuracy.Theyare,therefore,usedwidelyformachinetools,industrialrobots,electronicdevices,andOAequipment.StainlesssteelmadeCamFollowersaresuperiorincorrosionresistanceandsuitableforapplicationsinenvironmentswhereoilcannotbeusedorwatersplashed,andincleanrooms.Types1、StandardTypeCamFollowersThesearethebasictypebearingsinIKOCamFollowerseries.Modelswithstuddiametersrangingfrom3to30mmareprepared,andaresuitableforawiderangeofapplications.2、SolidEccentricStudTypeCamFollowersThestudofthesebearingsiseccentrictothecenteraxisoftheouterring.Thus,thepositionoftheouterringintheradialdirectioninrelationtothematingtracksurfacecaneasilybeadjustedbyturningthestud,andtheloaddistributiononanumberofcamfollowerouterringsusedonthesametracksurfacecanbemadeuniform.Theseareeccentriccamfollowerswithaone-piecestudthatcanbemountedinthesamemountingholesasthoseforStandardTypeCamFollowers.Eccentricityis0.25mm0.6mm.3、EccentricTypeCamFollowersInthesebearings,aneccentriccollarisassembledwiththeCamFollowerstud,enablingtheouterringtobepositionedeasilyintheradialdirectionagainstthematingtracksurface.Eccentricityis0.41.5mm.4、ThrustDiskTypeCamFollowersThesebearingshavespecialresinthrustdiskwash-erssuperiorinwearandheatresistancebetweentheslidingsurfacesofouterringshoulders,studheadandsideplate.Thesediskwashersreducefrictionandwearduetoaxialloadscausedbymisalignment,etc.5、CentralizedLubricationTypeCamFollowersThesebearingshaveoneortwopipe-threadedholesinthestud.Thus,thisseriesissuitablewhencentralizedlubricationisrequired.6、EasyMountingTypeCamFollowersThesebearingshaveasteppedtaperedportiononthestud.WhenmountingtheCamFollower,itiseasytofixitslocationbytighteningasetscrewtothesteppedportion.Thus,thistypeissuitablewhenalargenumberofCamFollowersareusedinamachinesuchasapalletchanger.7、C-lubeCamFollowerThesebearingsarelubricatedwithanewlydevelopedthermosettingsolid-typelubricantwhichfillstheinnerspaceofthebearing.Thislubricantprovideslong-termmaintenancefree.8、HeavyDutyTypeCamFollowersThesebearingsarefullcomplementtypebearingsincorporatingdoublerowsoffullcomplementcylindricalrollersintheouterring,andcanwithstandlargeradialloadsandsomeaxialloads.9、MiniatureTypeCamFollowersThesearecompactlydesignedbearings,incorporatingverythinneedlerollersinanouterringwithasmalloutsidediameter.Theyareusedinelectronicdevices,OAequipment,smallindexdevices,etc.10、InchseriesCamFollowersTwotypes,CRandCRH,areavailableintheInchseriesCamFollowers.BlackoxidefilmtreatmentismadeonCRHmodels.MaximumAllowableStaticLoadTheapplicableloadonCamFollowersis,insomecases,limitedbythebendingstrengthandshearstrengthofthestudandthestrengthoftheouterringinsteadoftheloadratingoftheneedlerollerbearing.Therefore,themaximumallowablestaticloadthatislmitedbythesestrengthsisspecified.TrackCapacityTrackcapacityisdefinedasaloadwhichcanbecontinuouslyappliedonaCamFollowerplacedonasteeltracksurfacewithoutcausinganydeformationorindentationonthetracksurfacewhentheouterringoftheCamFollowermakescontactwiththematingtracksurface(plane).Iflubricationbetweentheouterringandthematingtracksurfaceisinsufficient,seizureand/orwearmayoccurdependingontheapplication.Therefore,attentionmustbepaidtolubricationandsurfacerough-nessofthematingtrackespeciallyforhigh-speedrotationssuchascammechanisms.OperatingTemperatureRangeTheoperatingtemperaturerangeforCamFollowersis-20.C+120C.However,themaxi-mumallowabletemperatureforthefollowingtypesisdifferent.ThemaximumallowabletemperaturefortheMetricCFserieswithastuddiameterd1of4mmorlessandCFS2is+110C,and+100Cwhentheyarecontinuouslyoperated.Themaximumallowabletemperatureforthesealedtypewithastuddiameterd1of5mmorlessis+80C.Mounting1、MakethecenteraxisofthemountingholeperpendiculartothemovingdirectionoftheCamFollowerandmatchthesideshoulderaccuratelywiththeseatingsurfaceindicatedbydimensionfinthetableofdimensions.Then,fixtheCamFollowerwiththenut.DonothittheflangeheadoftheCamFollowerdirectlywithahammer,etc.Thismayleadtoabearingfailuresuchasirregularrotationorcracking.2、TheIKOmarkontheflangeheadofthestudindicatesthepositionoftheoilholeontheraceway.Avoidlocatingtheoilholewithintheloadingzone.Thismayleadtoashortbearinglife.Theholelocatedinthemiddlepartofthestudperpendiculartothestudcenteraxisisusedforgreasingorlocking3、Whentighteningthenut,thetighteningtorqueshouldnotexceedthevaluesshowninthetableofdimensions.Ifthetighteningtorqueistoolarge,itispossiblethatthethreadedportionofthestudwillbebroken.Whenthereisapossibilityofloosening,aspecialnutsuchasalocknut,springwasher,orself-lockingnutshouldbeused.4、InthecaseofSolidEccentricStudTypeCamFollowersandEccentricTypeCamFollowers,theouterringpositioncanbeadjustedappropriatelybyturningthestudwithascrewdriverorhexagonbarwrenchusingthescrewdriverslotorhexagonholeofthestudhead.Thestudisfixedwithanutandaspringwasher,etc.Thetighteningtorqueshouldnotexceedthevaluesofmaximumtighteningtorqueshowninthetableofdimensions.Whenshockloadsareappliedandtheadjustedeccentricityhastobeensured,itisrecommendedtomakeholesinthehousing,studandeccentriccollar,andfixthestudwithadowelpinasshowninfollowing.However,whenthestuddiameterislessthan8mm(Eccentriccollardiameter11mm),itisdifficulttomakeaholeinthestudbecausethestudisthrough-hardened.5、IncaseofEccentricTypeCamFollowers(CFE),thelengthofthemountingholeshouldbemorethan0.5mmlongerthanthedimensionofEccentriccollarwidth.6、FormountingEasyMountingTypeCamFollowers,itisrecommendedtofixthefixingscrewfromtheuppersidetothesteppedportionofthestud.InspectionofbearingCleaningofbearingWheninspectingabearingafterremoval,theappear-anceofthebearingshouldberecordedfirst.Then,aftertheresidualamountoflubricantischeckedandasampleoflubricantiscollected,thebearingshouldbecleaned.Forcleaning,lightoilorkeroseneiscommonlyused.Cleaningisdividedintoroughcleaningandfinalcleaning,andwiregauzeissetasaraisedbottominacontainertopreventthebearingfromtouchingthebottomofthecontainer.Lubricatinggreaseandadheringsubstancessuchasforeignparticlesareremovedwithabrush,etc.,usingoilforroughcleaning.Careshouldbetakenduringthisprocess,becauseifthebearingisturnedwithforeignparticlesattached,theracewaysurfacesmaybescratched.Finalcleaningiscarriedoutbyturningthebearingincleaningoil.Itisdesirablethatthecleaningoiliskeptcleanbyfiltering.Immediatelyaftercleaning,thebearingmustbeprotectedagainstcorrosion.InspectionandevaluationofbearingThejudgmentastowhethertheremovedbearingisreusabledependsontheinspectionaftercleaning.Conditionsoftheracewaysurfaces,rollingelementsandfittingsurfaces,wearconditionofthecage,increaseofbearingclearance,dimensions,rotationalaccuracy,etc.shouldbecheckedfordamageandabnormalities.Theevaluationisperformedbasedontheexperiencetakingintoconsiderationthedegreeofdamage,machineperformance,importanceofthemachine,operatingconditions,perioduntilthenextinspection,andothersuchfactors.MaintenanceandinspectionMaintenanceandinspectionarecarriedouttomain-taingoodperformanceofbearingsinstalledinthemachine.Maintenanceisperformedbycheckingthemachineoperatingconditions,checkingandreplenishingorr
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 预防职业病教学课件
- 新生儿肺炎表现及预防
- 《电子产品制造技术》课件-第2章 印制电路板认知
- 冲床维修培训
- 顺利消防2023课件
- 项目现场安全课件
- 《道路勘测设计》课件-第三章 平面设计
- 音乐律动介绍课件
- 汽车配套产业基地项目风险管理方案(范文)
- 城市污水管网建设工程投资估算方案(模板)
- DB64∕T 2131-2025 建筑施工非常规高处吊篮施工规程
- 医院关于开展整治重复医疗检查检验、违规收费问题工作实施方案的通知
- 孕妇营养管理课件大全
- 2024年湖北省普通高中学业水平合格性考试数学试题(原卷版)
- 常州市钟楼区社区专职工作者招聘笔试真题2024
- 2024年安徽中医药高等专科学校招聘考试真题
- 2025年变电站春季安全生产自查报告
- 充电桩充电服务与充电站安全保障合同
- 个人信息保护合规审计师CCRC-PIPCA含答案
- 2025鄂尔多斯达拉特旗智杰教育投资有限责任公司面向社会招聘10名工作人员笔试参考题库附带答案详解析集合
- 小型引调水工程可行性研究报告
评论
0/150
提交评论