外文翻译超高速靠模工具机进行航空零件的制造.doc
收藏
编号:96615
类型:共享资源
大小:58KB
格式:DOC
上传时间:2013-11-17
上传人:上***
认证信息
个人认证
高**(实名认证)
江苏
IP属地:江苏
6
积分
- 关 键 词:
-
专业文献
学术论文
精品文档
外文翻译
- 资源描述:
-
附录A:英文资料Ultra-high-speedprofilerforaircraftpartmachiningDHP-120B:developmentgoalsandperformanceKazuyaTanakaManagerDesigningSect.II,EngineeringDept.I1.InstructionItisgenerallysaidthattheconditionssurroundingtheaircraftindustryhavebeenlessthanoptimalsincetheterroristattackofSeptember11,2001,buttheJapaneseaircraftindustryseemstobeinaslightlydifferentsituation.ThisisobservationissupportedbythefactthattheDefenseAgency’s“PX”(advancedanti-submarinepatrolplane)and“CX”(cargotransportplane)projectshavebeenapproved,andBoeing-andAirbus-relatedcontracthavenotdeclinesignificantly.Thankstotheseandotherfactors,suchasthefactthattheindustryisenteringtheequipmentreplacementphase,theJapaneseaircraftindustryiscurrentlyinrelativelygoodshape.Undertheinfluenceoftheglobalmarketneeds,thereisverystrongdemandforreducingthecostsofcivilaircraftparts.Tomeetthisdemand,aircraftmanufacturersandjobshopscontractedtosupplypartstothemhavebeenworkinghardtoreducecostandimprovemanufacturingtechnologyandproductivity.Thenumberofaircraftproducedbymanufacturersofsmalljetaircraftisincreasingatamuchfasterratethanthenumberofaircraftproducedbymanufacturersmoreorlessspecializinginlargeraircraft,suchasBoeingandAirbus.Despitethesteadygrowthofdemand,jobshopsundercontractwiththeseaircraftmanufacturersarebeingfacedwithincreasingpressuresforcostreduction.TheemergenceofsoutheastAsiancountriescapableofproducingpartsatlowcoasthasmadepricecompetitionfiercer.TheChineseaircraftindustryisburstingwithenergybecausejobshopsinChinacannowcompetewithJapanesejobshopsinleadtimeandqualityinadditiontobeingabletoproducepartsatlowercoasts.Giventheseglobaltrendtrends,itcanbesaidthattheJapaneseaircraftindustry’spositionisdelicateinthecompetitivemarket.Inspiteoflead-timeandqualitysuperiority,theJapaneseaircraftindustryisfightingasteeplyuphillbattleinpricecompetition.Tohelpcopewiththesituationasamachinetoolmanufacturer,SNKhasdevelopedDHP-120B,anadvanced5-axisultra-high-speedhorizontalprofilerthatisatoncemostcost-effectiveandhighlyproductive.Therestofthisarticleintroducesthenewprofiler.2.Background:BriefHistoryofProfilerDevelopmentatSNKSincethedevelopmentofSM-13SparMill(with13numericallycontrolledaxes)in1967,SNKhasdevelopedmanymachinetoolsdesignedforaircraftpartsmachiningandfive-axisprofilers,anddeliveredmanymachinestospecialtyjobshopsbothinJapanandabroad.Oneofthelargermachinesrecentlydevelopedanddeliveredisatwo-gantry,A&B-axis-type,three-spindlefive-axisprofilerwitha64-meter-longbedwitha4-meter-wideworkingsurface(Photo1).AsshowninPhoto1,theseprofilerareverticalspindlemachinesthatenabletheoperatortosetupalargeworkpieceonthebedinastableposition.Astimepassed,however,thewayaircraftpartsaremanufacturedhaschanged:machiningofforgings,whichusedtobethemethodofmanufacturingaircraftparts,begantobereplacedbythemethodofmachiningcomplexpartsoutofsolidmaterialinordertoreducethenumberandweightofparts.Thismeantremovingmostofthematerialduringmachining.Useofhigh-speedmachining,whichisdesignedtoincreaseproductivity,alsodramaticallyincreasedthevolumeofmetalremovedperhour,makingverticalspindlemachinesanunrealisticchoicefromthestandpointofchipremoval.Tomeetthechangingneeds,SNKdevelopedHPS-4B(Photo2),alarge5-axishigh-speed,horizontal,tilting-table–typeprofilerdesignedspecificallyforhigh-speedmachiningofcomplexpartsoutofsolidmaterial,easysetupandefficientchipremoval.Thenewmachinewasputonexhibitatthe1998Chicagoshowandwashailedbyaircraftpartsjobshops.Since,however,HPS-4Bisalargemachinewitha2×10mmachineenvelope,itwastoolargeandtooexpensiveforsmallerjobshops.Todemonstratethesuperiorofthemachineconceptandeasyoperatorofferedbythistypeofmachine,SNKdevelopedamachinebasedonasimilarconcept.Thismachine,HPS-120B,isacompactandreasonably-price5-axishigh-speedhorizontalprofiler(Photo3)andwasexhibitedatthe2000Chicagoshow.Thismachinewasacclaimedforitsperformanceandeconomyandhasnowbecomeoneofthegreatestvalue-addedmodelsoftheSNKprofiler.Marketneeds,however,havechangedrapidly,andtherehasbeenincreasingpressureforcostreduction,asmentionedearlier.Recognizingtheneedforahigh-speedprofilercapableofperformingmachinewithunprecedentedefficiency,SNKdevelopeditsnewest5-axisultra-high-speedhorizontalprofiler,UHP-120,thatinheritstheacclaimedfeaturesoftheHPSseriesofprofiler,andputthemachineonexhibitatthe2001EMOshow.3.UHP-120B:DevelopmentGoalsandPerformanceTheaimofdevelopmentofUHP-120Bistooffertousersacost-effectivemachinethatboostsproductivityinthemachiningofmedium-andsmall-sizedpartsofaluminum,amaterialwidelyusedinaircraftapplications.UsingHPS-120B,whichhasprovenperformanceinthefieldofhigh-speedmachine,asabasemachine,SNKdevelopedUHP-120B(Photo4)throughextensiveresearchanddevelopment.Therestofthissectionintroducesprincipaltechnologiesincorporatedintothenewmachinetoachievethegoalsofthemachine.Forinformationonthemachine’smainspecifications,pleaseseeNewProductNewsinthisreport.1)Technologytoachievehighproductivity(1)Developinghigh-speedhigh-powerspindleunitItisgenerallysaidthatthereisnolimittocuttingspeedsusedinthemachiningofaluminumtomanufactureaircraftparts.Thekeytoincreasingproductivityinsuchmachiningistofindawaytoachievehighmetalremovalratesathighcuttingspeeds.Tothisend,wedevelopedanew75kW,32,000min-1,high-speedhigh-powerspindleunitwithacompact,powerfuldrivemotorforthenewprofiler.Thishigh-performancespindleunitranksamongthehighestintermsofspindlespeedandpowerforthespindleconfigurationisequippedforHSK-E63toolsaccordingtouserneeds.Thespindlebearingsareequippedwithanunder-racelubricationsystemtoenhancereliabilityofhigh-speedmachiningduringlong-timeoperation.(2)IncreasingfeedratesHighaxisfeedratesandhighacceleration/decelerationcapabilitiesareimportantfactorsdirectlyaffectingmachiningtimeandmachiningaccuracythatcanbeachievedinhigh-speedmachining.Forthelinearaxes,twindrivesystemsandtow-motor-drivemechanismshavebeenemployedtoincreasetherigidityofthedrivesystem,toincreasefeedratesandmaximizeacceleration/deceleration,andtoincreaseproductivity.Asaresult,themaximumcuttingfederatesof40m/minand4800deg/minhavebeenachievedforthelinearaxes,respectively.WebelievethatUHP-120Branksamongthebestintermsofspindleandaxisandaxisfeedcapabilityinthefieldofthemachiningofaluminumaircraftparts.(3)MinimizingmovingmassesReducingthemovingmassalongeachaxisisaneffectivewaytomakeaxismovementfasterandachieveahighlevelofdynamicresponsiveness.UHP-120Bhasbeendesignedasamovingramtype,insteadofamovingcolumntype,machine,thestructuraldesignhasbeenoptimizedthroughminimizationofthemovingmassesandcomputer-aidedstructuralanalysestomakethemachinestructureverylightandstiff.ThespindleheadandthespindleheadsaddleinstalledontheZ-axisramaremadeofaspeciallightweightalloywhosecoefficientofthermalexpansioniscomparabletothatofironsoastoreducetheweightsofthemovingpartsandminimizedeflectionsoftheramaxisduetoY-axisaccelerationacceleration/deflectionsorZ-axisextension.Althoughthespeciallightweightalloyisstillexpensive,itisusedbecauseofitsaccuracyandperformanceadvantages.(4)EndlessrotationofC-axisAshipringsystemhasbeenbuiltintotheC-axismechanismtoenableendlessrotationofC-axis,therebyeliminatingtheneedtorewindC-axis,adrawbackofafive-axismachinewithAandCrotaryaxes.Thus,rewindmotion,whichwouldbeunavoidableonaconventionalmachine,cuttermarksleftwhilethecutterisnotmovinginrelationtotheworkpiece,andextracareneededduringNCprogramminghavebeeneliminated.Therotationspeedshavebeenincreased,andthetimerequiredfordecelerationalongthelineraxes,whichusedtoslowdownC-axismovement,hasbeenminimizedsoastoshortenmachiningtime.(5)TiltingtableUHP-120Bisequippedwithatiltingtablesystem,whichisthesametypeasthetiltingtableusedontheHPS-seriesfive-axisprofilersandwaswell-receivedbyitsusers.Withthistiltingtable,theworkpiececanbesetuponthetabletiltedintoastablehorizontalposition.Machiningoperationscanbeperformedwhilethetableisintheverticalpositionsothatlargevolumesofchipsproducedduringhigh-speedmachiningcanberemovedfromthemachiningzonequickly.Thus,theproblemofchipremovalhasbeensolvedwhilemaintainingahighlevelofproductivity.(6)High-speedcontrolHigh-speedfive-axismachiningofaircraftpartsrequiresevaluatingmanydatablocksaheadandprocessingdatablocksathighspeed,asformachiningofautomobilediesandmolds.Cuttingtoolsmustalsobeprovidedwithfive-axiscontrolorientedfeaturessuchasfive-axistoollengthanddiametercompensation.TheprecisioncontouringcapacityofUHP-120Bhasbeenupgradedforhigh-speedfive-axiscontrol.High-speedcontrolorientedfeaturesnewlyaddedtoincreaseproductivityincludeFineHPCC(HighPrecisionContourControl),whichcontrolsrotaryandlinearaxismovementaccuratelyandsmoothly,tooltipcontrol,andthree-dimensionalcutterdiametercompensation.(7)SafetyandenvironmentalfeaturesAsspindlespeedsandfederatesincrease,therisksposedbyflyingchipsandbrokencuttersincrease.Toensuresafetyformthesedangers,themachiningareaincludingthehigh-speedspindleiscompletelyenclosedbyasplashguard.ThroughthesplashguardwindowsoraTVmonitorinstalledoutsidethemachiningarea,theoperatorcanmonitormachiningoperationsand
- 内容简介:
-
-
- 温馨提示:
1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。