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1、ResearchProgressofKeyTechnologyofHighSpeedandHighPrecisionMotorizedSpindlesAbstract:Highspeedmachiningandhighprecisionmachiningaretwotendenciesofthemanufacturingtechnologyworldwide.Themotorizedspindleisthecorecomponentofthemachinetoolsforachievingthehighspeedandhighprecisemachining,whichaffec
2、tsthegeneraldevelopmentlevelofthemachinetoolstoagreatextent.Progressofthekeytechniquesisreviewedinthispaper,inwhichthehighspeedandhighprecisionspindlebearings,thedynamicalandthermalcharacteristicsofspindles,thedesigntechniqueofthehighfrequencymotorsandthedrivers,theanti-electromagneticdamaget
3、echniqueofthemotors,andthemachiningandassemblingtechniqueareinvolved.Finally,thedevelopmenttendenciesofthemotorizedspindlesarepresented.Keywords:motorizedspindles;high-speedmachining1IntroductionInrecentdecades,therehavebeenrapidandgreatdevelopmentsinhigh-speedmachiningtechnology.Comparedtoco
4、nventionalmachining,theprincipaladvantagesofthistechnologyareasfollows:(1)Materialremovalrateandtheproductivityrisesignificantly;(2)Cuttingforcecanbedecreasedover30%,especiallyinradialdirection;(3)Mostofthecuttingheatcanbetakenawaybychipsandtheworkpiececanbekeptincoldstate,whichisaptforcuttin
5、gwork-piecethatareeasilysubjectedtothermaldeformation;(4)Itrotateswithlittlevibrationwhicharehelpfulforcreatesexcellentsurfacequalityandhighdimensionprecision,becausetheexcitementfrequencyismuchhigherthanthenaturalfrequencyofthemachinetool-cuttingtool-workpieceprocesssystem.Oneofthekeytechnol
6、ogiestoachievehigh-speedmachiningistousemotorizedspindles[1].Motorizedspindleisanewdesign,whichisequippedwithbuild-inmotorasanintegratedpartofthespindleshaft.High-speedbearingtechnology,high-speedmotortechnology,high-speedtoolstechnology,coolingandlubricationtechnology,moderncurrentalteringte
7、chnologyareinvolvedinmotorizedspindle.Motorizedspindledesigneliminatestheneedforpowertransmissiondevicessuchasgearsandbelts,thusavoidsvibrationsandnoisecomingfromtransmissionsystems,andimprovetherotatingaccuracyofthespindle.Itcanachievequicks
