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外文翻译超高强度型HF-5M加工中心.doc外文翻译超高强度型HF-5M加工中心.doc

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编号:201311171435306614    类型:共享资源    大小:68.00KB    格式:DOC    上传时间:2013-11-17
  
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附录A:英文资料DeepslotmillingwithalargesidecutterboostsrotormachiningproductivitySuper-High-RigidityTypeHF-5MMulti-Center(BridgeTypeMachiningCenter)Interviewee:YuujiAidaAssistantGeneralManagerProductionEngineeringSect.ManufacturingDept.,OhtaFactoryJapanMotor&GeneratorCo.,Ltd.Interviewer:Ken’ichiShimadaManager,DesigningSect.ⅢEngineeringDept.ⅠCompanyProfileofJapanMotor&GeneratorCo.,Ltd.Headquarters:1-1-1Shirogane-Cho,HitachiCity,IbarakiEstablished:July,2000Capital:2.4billionyenNo.ofemployees:600Businessactivities:Planning,developmentdesignandmanufactureofhigh-voltagemotorsandmedium-andsmall-capacitygeneratorsProfileofOhtaFactoryLocation:127Nishi-Shin-Machi,OhtaCity,Gunma(OhtaWorks,MeidenshaCorporation)History&Profile:2000JapanMotor&GeneratorCo.,Ltd.EstablishedasajointventureofMeidenshaCorporation,Hitachi,Ltd.andFujiElectricCo.,Ltd.2001Startedbusinessasajointventure.EstablishedjointlybyMeidensha,HitachiandFujiElectrictocombinethetechnologicalstrengthsofthethreecompanies,JapanMotor&GeneratorCo.,Ltd.hastop-leveltechnologyandR&Dcapability.JM&GistakingupthechallengeofbecomingaleadingmanufacturerinJapanandthenestablishinganinternationalpresence.1.BackgroundtoIntroductionofHF-5MShimada:ThankyouforpurchasingSNK’sHF-5MMulti-Center.Themachinewasinstalledthisyear.Firstofall,couldyouexplainthecircumstancesthatledtotheintroductionoftheHF-5M?Aida:InJuly2000,Meidensha,HitachiandFujiElectricestablishedajointventure,JapanMotor&GeneratorCo.,Ltd.,wherethethreecompaniesagreedonatie-upforthemanufactureofsmallgenerators.ThemissionofJM&Gistoprovidecustomerswithhigh-quality,high-performanceproductsinacost-efficientandtimelymanner.Tothisend,JM&Gcombinesthestrengthsofthetechnology,know-howandhumanresourcesofthethreecompanies.MeidenshaalsohadtoupgradeitsproductionfacilitiesbecausethecompanyhadbeenselectedasapartnerofGEAeroEnergyProducts,amajorsubsidiaryofElectricCompany.Shimada:DoesthatmeanthenewlyinstalledSNKmachineisnotamereadditiontomachinetools?Imean,themachineissupposedtofulfillanumberofpurposes,isn’tit?Aida:InstalledpowergenerationcapacityintheUnitedStateshasbecomeinadequateinrecentyears.Tocopewiththesituation,variousactions,includingtheliberalizationofthepowermarket,havebeentaken.Underthesecircumstances,demandforgeneratorshasgrownsuddenly.Asageneratormanufacturer,GEtriedtomeetthedemand,butitwasnecessarytoincreaseitsproductioncapacity.Thisiswherewecamein.Productionofgeneratorswasoneoftheareaswearegoodat,butourestimatesofdemandincreasesmadeitclearthatwemustdrawupaplanforanewproductionfacilitytoincreaseourrotormachiningcapacity.Thereweretwomajorgoalswewantedtoachievewiththenewproductionfacility.(1)Thefirstgoalistoreduceman-andmachine-hourrequirements(increasingproductivityby60percent).Thisrequiresustodramaticallyimprovemachiningconditionsandestablishproductiontechnology.(2)Thesecondgoalistoshortenmachiningleadtime(reducingmachiningleadtimebyhalf).Thisrequiresustostreamlinemachiningprocessesandeliminatetheneedtomoveworkpiecesfrommachinetomachine.Toachievethesegoals,wesetthreerequirementsforthenewproductionfacility.(1)Thefirstrequirementisashortertimetodeliverytomeetrapidlygrowingdemand.(2)Thesecondrequirementisamachinetoolcapableofheavycutstoincreaseproductivity.Thisrequirementmustbemettoensurehighmechanicalrigidityandreliability.(3)Thethirdrequirementistheenhancementofautomation-orientedfeaturestoincreaseuptimeandmetalremovalrates.2.What’sa“generatorrotor”?Shimada:Beforegoingintodetailsofthenewmachinetool,wouldyouexplainthe“generatorrotor,”whichistheprincipalworkpiecetobemachinedonthenewmachine?Aida:Therearemanytypesofgenerators,suchaswater-wheelgeneratorsandturbinegenerators.Forexample,ourgeneratorsystemscomposedofgeneratorsmanufacturedatourOhtaFactoryanddieselengineshaveanoutputrangeof20to1874kVA.Thesegeneratorsystemsarehighlyacclaimednotonlyasgeneral-purposebackupgeneratorsystems,butalsoasemergencydieselpowergenerationsystems.Theyareinuseinmanypartsoftheworld,includingvariousbuildingsinJapanandeventheShowastationinAntarcticaintheextremelycoldregion.Tomanufacturetheseproducts,ourfactoryisequippedwithtwo100-toncranes,largemachinetoolsincluding10-meterand7-meterlaths,andacleanroominwhichrotorwindingsaremanufactured.Shimada:I’vebeentothefactorymyself,anditwasindeedequippedwithavarietyofmachinetools.Iwasreallyimpressedwiththehighaccuracyandqualityoflargegeneratorpartsmachinedinthefactory.Ialsohadanopportunitytoseemanygeneratorsbeingmanufacturedthere.“Energetic”isthewordthatcametomindwhenIsawthefactory.Aida:Thankyou.Now,letmeexplainaboutrotorshafts,theworkpiecestobemachinedonournewmachinetool,takingabipolar,air-cooled,turbinegeneratorasanexample.Unlikethebackup/emergencygeneratorsIhavejustmentioned,theregeneratorsconsistoflargegeneratorsmanufacturedatOhtaFactorywhicharedrivenbysteamorgasturbines.Thesegeneratorsarewidelyusedforindustrialandpowergenerationapplications.Standardgeneratingcapacityis75,000kVAorless.Thepower-generatingpartofthegeneratorconsistsofastator,arotorandarotorbearing.Therotorisanassemblyofanironcore,ashaftfieldwindings.Thepartwewanttobemachinedonthenewmachinetoolistheironcoreandshaft.Tomakethingseasiertounderstand,let’scallita“rotorshaft”.Shimada:Isee.How,then,doyoumanufacturearotorshaft?Aida:Arotorshaftiscarvedoutofaforgedlow-alloyblankthathasexcellentmagneticproperties.Majorstepsinthemanufacturingprocessare(1)turning,(2)slotmilling,drillingandtapping(milling),(3)grindingthebearings,(4)fittinginthecoils,and(5)balancing(finishturning).3.UseofFive-FaceMachiningSystemShimada:Then,thenewlyinstalledHF-5Missupposedtobeusedforslotmilling,drillingandtappingoftherotorshaft.Wehearthatmanymanufacturersperformdeepslotmillingofrotorshaftsonspecial-purposemachines.Why,then,didyouchooseourfive-facemachiningsystem?Aida:Ifwethinkonlyoftheslotmillingofrotorshafts,wecouldgowithaplanertypemachinetoolorwithalathe-basedhorizontalmachineequippedwithasidecutterspindlemountedonthecarriage.However,withaplanertypemachine,wecan’texpecthighmachiningefficiency.AndwethoughtthatthesetypesofmachineswouldnotmeetourrequirementsImentionedattheoutset.Thereasonsisthis.Therotorshafthasatotalof42deepslotscalledcoilslotsandventslots.
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