山东大学硕士研究生文献综述CONTENTSTOC\o"1-3"\h\z\uHYPERLINK\l"_Toc333851217"abstractPAGEREF_Toc333851217\h1HYPERLINK\l"_Toc333851218"1．IntroductionPAGEREF_Toc333851218\h2HYPERLINK\l"_Toc333851219"2.VariablepreloadspindlesystemPAGEREF_Toc333851219\h3HYPERLINK\l"_Toc333851220"3.AnalysisofbearingpreloadPAGEREF_Toc333851220\h4HYPERLINK\l"_Toc333851221"3.1.PreloadforhighspeedPAGEREF_Toc333851221\h4HYPERLINK\l"_Toc333851222"3.2.PreloadforlowspeedPAGEREF_Toc333851222\h5HYPERLINK\l"_Toc333851226"4.ComparisonofspindlebehaviorbetweenvariablepreloadPAGEREF_Toc333851226\h7HYPERLINK\l"_Toc333851227"andconstantpreloadPAGEREF_Toc333851227\h7HYPERLINK\l"_Toc333851228"4.1.TemperaturerisesPAGEREF_Toc333851228\h7HYPERLINK\l"_Toc333851229"4.2.DynamicstiffnessPAGEREF_Toc333851229\h7HYPERLINK\l"_Toc333851230"5.ConclusionsPAGEREF_Toc333851230\h8References9AbstractAngularcontactballbearingshavebeenwidelyusedinmachinetoolspindles,andthebearingpreloadplaysanimportantroleontheperformanceofthespindle.Withthedevelopmentofhighspeedmachining,especiallyforhighspeedmilling,heavycuttingatalowspeedandlightcuttingatahighspeedareoftenperformedonasinglemachinetoolspindle,thus,highstiffnessatlowspeedandlowtemperatureriseathighspeedarerequired.Thetraditionalconstantpressurepreloadmethodcannotmeetthetechnicalrequirementofthiskindofspindleanymore.Thevariablepreloadtechnologyissystematicallyinvestigatedinthispaper.Athighspeedrange,FEMmethodisusedtoanalyzethetemperaturedistributionofthespindle,andthevariablespindlepreloadisdeterminedaccordingtotheconstraintoftemperatureriseofbearings.Atlowspeedrange,thespindlepreloadisresolvedbythefatiguelifeofbearings.ThedynamicstiffnessofthevariablepreloadspindleisanalyzedutilizingtheTransferMatrixMethod(TMM)andanonlinearbearingmodelthatincludesthecentrifugalforceandgyroscopiceffects.Anexperimentalset-upforthevariablepreloadspindleisdevelopedusinghydraulicpressurethatcanau