机床主轴轴承预紧及其影响的研究-豆柴文库

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机床主轴轴承预紧及其影响的研究
Title:ResearchonPreloadingofSpindleBearingsinMachineToolsanditsImpact
Abstract:
Thepreloadingofspindlebearingsinmachinetoolsplaysacriticalroleinensuringtheperformance,precision,andlongevityofthemachine.Thisstudyaimstoinvestigatetheconceptofpreloadinganditsimpactonmachinetoolspindlebehavior.Thepaperprovidesacomprehensiveoverviewofthepreloadingtechniquescommonlyemployedinspindlebearings,alongwiththeiradvantagesanddisadvantages.Additionally,itdiscussestheeffectsofpreloadingonseveralkeyperformanceparameters,includingspindlestiffness,thermalstability,andaxialrunout.Thefindingspresentedinthisresearchcanserveasavaluablereferenceforengineersandmanufacturersinvolvedinmachinetooldesignandoptimization.
1.Introduction:
Machinetoolsarewidelyusedinvariousindustriesformanufacturingcomponentswithhighprecisionandaccuracy.Thespindlebearingsystemisacriticalcomponentofamachinetool,responsibleforsupportingandprovidingrotationalmotiontothespindle.Preloadingthespindlebearingseffectivelyreducesrotationalandaxialdisplacementsinducedbyexternalloads,ensuringpreciseandstablemachiningoperations.Thisresearchaimstoinvestigatepreloadingtechniques,theirimpactsonspindlebehavior,andtheoverallperformanceofmachinetoolsystems.
2.PreloadingTechniques:
2.1AxialPreload:
Axialpreloadinvolvesapplyingaforcetothebearingintheaxialdirection,tighteningthebearingsandeliminatingaxialclearances.Thistechniqueenhancesloadcarryingcapacity,improvesstiffness,andminimizesaxialdisplacementscausedbyexternalloads.
2.2AngularContactBearings:
Angularcontactbearings,commonlyusedinspindleapplications,aredesignedtohandlebothradialandaxialloads.Theyofferseveralpreloadingmethods,includingsinglenutpreload,doublenutpreload,andspringpreload.Eachmethodhasuniqueadvantagesandlimitations.
2.3TaperedRollerBearings:
Taperedrollerbearingsareanotherpopularoptionforspindleapplications.Theycanachievepreloadingbyadjustingtheaxialpositionoftheinnerandouterrings.Taperedrollerbearingsprovidehighstiffnessandloadcapacity,makingthemsui