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外文翻译超高强度型HF-5M加工中心.doc

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外文翻译超高强度型HF-5M加工中心.doc

附录A英文资料DeepslotmillingwithalargesidecutterboostsrotormachiningproductivitySuperHighRigidityTypeHF5MMultiCenterBridgeTypeMachiningCenterIntervieweeYuujiAidaAssistantGeneralManagerProductionEngineeringSect.ManufacturingDept.,OhtaFactoryJapanMotorGeneratorCo.,Ltd.InterviewerKenichiShimadaManager,DesigningSect.ⅢEngineeringDept.ⅠCompanyProfileofJapanMotorGeneratorCo.,Ltd.Headquarters111ShiroganeCho,HitachiCity,IbarakiEstablishedJuly,2000Capital2.4billionyenNo.ofemployees600BusinessactivitiesPlanning,developmentdesignandmanufactureofhighvoltagemotorsandmediumandsmallcapacitygeneratorsProfileofOhtaFactoryLocation127NishiShinMachi,OhtaCity,GunmaOhtaWorks,MeidenshaCorporationHistoryProfile2000JapanMotorGeneratorCo.,Ltd.EstablishedasajointventureofMeidenshaCorporation,Hitachi,Ltd.andFujiElectricCo.,Ltd.2001Startedbusinessasajointventure.EstablishedjointlybyMeidensha,HitachiandFujiElectrictocombinethetechnologicalstrengthsofthethreecompanies,JapanMotorGeneratorCo.,Ltd.hastopleveltechnologyandRDcapability.JMGistakingupthechallengeofbecomingaleadingmanufacturerinJapanandthenestablishinganinternationalpresence.1.BackgroundtoIntroductionofHF5MShimadaThankyouforpurchasingSNKsHF5MMultiCenter.Themachinewasinstalledthisyear.Firstofall,couldyouexplainthecircumstancesthatledtotheintroductionoftheHF5MAidaInJuly2000,Meidensha,HitachiandFujiElectricestablishedajointventure,JapanMotorGeneratorCo.,Ltd.,wherethethreecompaniesagreedonatieupforthemanufactureofsmallgenerators.ThemissionofJMGistoprovidecustomerswithhighquality,highperformanceproductsinacostefficientandtimelymanner.Tothisend,JMGcombinesthestrengthsofthetechnology,knowhowandhumanresourcesofthethreecompanies.MeidenshaalsohadtoupgradeitsproductionfacilitiesbecausethecompanyhadbeenselectedasapartnerofGEAeroEnergyProducts,amajorsubsidiaryofElectricCompany.ShimadaDoesthatmeanthenewlyinstalledSNKmachineisnotamereadditiontomachinetoolsImean,themachineissupposedtofulfillanumberofpurposes,isntitAidaInstalledpowergenerationcapacityintheUnitedStateshasbecomeinadequateinrecentyears.Tocopewiththesituation,variousactions,includingtheliberalizationofthepowermarket,havebeentaken.Underthesecircumstances,demandforgeneratorshasgrownsuddenly.Asageneratormanufacturer,GEtriedtomeetthedemand,butitwasnecessarytoincreaseitsproductioncapacity.Thisiswherewecamein.Productionofgeneratorswasoneoftheareaswearegoodat,butourestimatesofdemandincreasesmadeitclearthatwemustdrawupaplanforanewproductionfacilitytoincreaseourrotormachiningcapacity.Thereweretwomajorgoalswewantedtoachievewiththenewproductionfacility.1Thefirstgoalistoreducemanandmachinehourrequirementsincreasingproductivityby60percent.Thisrequiresustodramaticallyimprovemachiningconditionsandestablishproductiontechnology.2Thesecondgoalistoshortenmachiningleadtimereducingmachiningleadtimebyhalf.Thisrequiresustostreamlinemachiningprocessesandeliminatetheneedtomoveworkpiecesfrommachinetomachine.Toachievethesegoals,wesetthreerequirementsforthenewproductionfacility.1Thefirstrequirementisashortertimetodeliverytomeetrapidlygrowingdemand.2Thesecondrequirementisamachinetoolcapableofheavycutstoincreaseproductivity.Thisrequirementmustbemettoensurehighmechanicalrigidityandreliability.3Thethirdrequirementistheenhancementofautomationorientedfeaturestoincreaseuptimeandmetalremovalrates.2.WhatsageneratorrotorShimadaBeforegoingintodetailsofthenewmachinetool,wouldyouexplainthegeneratorrotor,whichistheprincipalworkpiecetobemachinedonthenewmachineAidaTherearemanytypesofgenerators,suchaswaterwheelgeneratorsandturbinegenerators.Forexample,ourgeneratorsystemscomposedofgeneratorsmanufacturedatourOhtaFactoryanddieselengineshaveanoutputrangeof20to1874kVA.Thesegeneratorsystemsarehighlyacclaimednotonlyasgeneralpurposebackupgeneratorsystems,butalsoasemergencydieselpowergenerationsystems.Theyareinuseinmanypartsoftheworld,includingvariousbuildingsinJapanandeventheShowastationinAntarcticaintheextremelycoldregion.Tomanufacturetheseproducts,ourfactoryisequippedwithtwo100toncranes,largemachinetoolsincluding10meterand7meterlaths,andacleanroominwhichrotorwindingsaremanufactured.ShimadaIvebeentothefactorymyself,anditwasindeedequippedwithavarietyofmachinetools.Iwasreallyimpressedwiththehighaccuracyandqualityoflargegeneratorpartsmachinedinthefactory.Ialsohadanopportunitytoseemanygeneratorsbeingmanufacturedthere.EnergeticisthewordthatcametomindwhenIsawthefactory.AidaThankyou.Now,letmeexplainaboutrotorshafts,theworkpiecestobemachinedonournewmachinetool,takingabipolar,aircooled,turbinegeneratorasanexample.Unlikethebackup/emergencygeneratorsIhavejustmentioned,theregeneratorsconsistoflargegeneratorsmanufacturedatOhtaFactorywhicharedrivenbysteamorgasturbines.Thesegeneratorsarewidelyusedforindustrialandpowergenerationapplications.Standardgeneratingcapacityis75,000kVAorless.Thepowergeneratingpartofthegeneratorconsistsofastator,arotorandarotorbearing.Therotorisanassemblyofanironcore,ashaftfieldwindings.Thepartwewanttobemachinedonthenewmachinetoolistheironcoreandshaft.Tomakethingseasiertounderstand,letscallitarotorshaft.ShimadaIsee.How,then,doyoumanufacturearotorshaftAidaArotorshaftiscarvedoutofaforgedlowalloyblankthathasexcellentmagneticproperties.Majorstepsinthemanufacturingprocessare1turning,2slotmilling,drillingandtappingmilling,3grindingthebearings,4fittinginthecoils,and5balancingfinishturning.3.UseofFiveFaceMachiningSystemShimadaThen,thenewlyinstalledHF5Missupposedtobeusedforslotmilling,drillingandtappingoftherotorshaft.Wehearthatmanymanufacturersperformdeepslotmillingofrotorshaftsonspecialpurposemachines.Why,then,didyouchooseourfivefacemachiningsystemAidaIfwethinkonlyoftheslotmillingofrotorshafts,wecouldgowithaplanertypemachinetoolorwithalathebasedhorizontalmachineequippedwithasidecutterspindlemountedonthecarriage.However,withaplanertypemachine,wecantexpecthighmachiningefficiency.AndwethoughtthatthesetypesofmachineswouldnotmeetourrequirementsImentionedattheoutset.Thereasonsisthis.Therotorshafthasatotalof42deepslotscalledcoilslotsandventslots.

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