加工中心刀库与机械手故障模型分析.pdf

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1、机床与液压Oct．2012HydromechatronicsEngineeringVo1．40No．19DOI：10．3969／j．issn．1001-3881．2012．19．018AnalysisofFaultModeloftheToolsStorageandMechanicalToolsofMachiningCenterSUNKuizhou，ZHOUJinyu，FENGHutianJ．JiangsuTeachersUnive~ityofTechnology，Changzhou213001，China；2．NanjingU

2、nive~ityofScienceandTechnology，Nanjing210094，ChinaAbstract：111emeantimebetweenfailures(MTBF)isanjmportantreliabilitycriterionfornumericaIcontrol(NO)machinetoo1．Usingthemethodoflinearregressionanalysisandhypothesistes-ting，thispaperstudiestheforepartfault’sinternalti

3、meofthetoolsstorageandmechanicaltoolsofmachiningcenter．andfindthedistributionmodeIoftheforepartfault’sintemaItime．Theprobabildensityfunctions，thedistributingfunctionandthefailurefunctionofforepartfault’sin·temaItimeofthetoolsstorageandmechanicaltoolsofmachiningcente

4、rarealsocalculated．ThefoundedmodeIprovidesatheoreticalbasisoftheassessingreliabilitycharacterizationsandthetechnicalmeasuresadoptedforreliabilitygrowth．Keywords：reliability，thetoolsstorageandmechanicaltools，forepartfault，distributionmodelAsthebasicequipmentformodemm

5、anufactur—60％ofthemachinefailurerate[2]．Theresearchingindustry，machiningcenterisdevelopinginthestudiesthetoolsstorageandmechanicaltoolsofonedirectionofhighperformance，multi—function，highdomesticverticalmachiningcenter，usingsixworkingaccuracy，highspeed，andhighflexibi

6、lity，soitismachiningcentersassamples，createsthedistribu—requiredtonotonlyperformwell，butalsobehighlytionmodelofthefault’sintemaltimeonthebasisofreliable．Thetoolsstorageandmechanicaltoolsaremathematicalanalysisanddeterminesthelongevityimportantpansinmachiningcenter．T

7、heyconsistsofdistributionfunctionofthesetoolsstorageandme—electrical，mechanicalandhydrauliccomponents．chanicaltoolsinmachiningcenter．Theresultswill鼢enthetoolsarechanged．themechanicaltoolsprovideatheoreticalbasisofthefaultanalyzingandandtoolsstorageperformmoreactions

8、quicklywiththetechnicalmeasurestakenforreliabilitygrowthrequirementformoreaccuratepositioning．Whencomplicatedpartsareprocessed，thefrequent