机械专业外文文献.docx
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机械专业外文文献.docx
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机械专业外文文献
NCTechnology
1、ResearchcurrentsituationofNClatheinourtimes
Researchanddevelopmentprocesstosuchvariouskindsofnewtechnologiesasnumericalcontrollathe,machiningcenter,FMS,CIMS,etc.ofcountriesallovertheworld,linkedtowiththeinternationaleconomicsituationclosely.Themachinetoolindustryhasinternationaleconomytomutuallypromoteanddevelop,enter21alerterasofWorldAffairs,thefunctionthatpeople’sknowledgeplaysismoreoutstanding,andthemachinetoolindustryisregardedasthefoundationofthemanufacturingindustryofthemachine,itskeypositionandstrategicmeaningaremoreobvious。
Within1991—1994years,theeconomicrecessionoftheworld,expensiveFMS,CIMSlowersthetemperature,among1995-2000years,theinternationaleconomyincreasesatalowspeed,accordingtorequisitionforNClatheandtheworldfourmajorinternationallathesexhibitioninordertoboostproductivityofusersofvariousfieldsofpresentworldmarket(EMO,IMTS,JIMTOF,ChinaCIMTofJapanofU.S。
A。
ofEurope),havetheanalysisoftheexhibit,therearethefollowingseveralpointsmainlyinthetechnicalresearchofNClatheinourtimes。
⑴Paymoreattentiontonewtechnologyandinnovation
Worldwide,arelaunchingthenewcraft,newmaterial,newstructure,newunit,researchanddevelopmentofthenewcomponentinamorecost—effectivemanner,developmentalresearchofforinstancenewcuttermaterial,thenewelectricmainshaftofmainshaftstructure,highspeed,high-speedstraightlineelectricalmachinery,etc。
.Regardinnovatinginimprovementoftheprocessingtechnologyasthefoundation,forprocessultraandharddifficulttocutmaterialandspecialcompositeandcomplicatedpart,irregularcurvedsurface,etc。
researchanddevelopnewlathevarietyconstantly。
⑵Improvetheprecisionandresearchofmachinetooling
Inordertoimprovethemachiningaccuracyofthemachiningcenter,areimprovingrigidityofthelathe,reductionvibrationconstantly,dispelhotlyandoutofshape,reducethenoise,improvetheprecisionoflocalizationofNClathe,repeatprecision,workingdependability,stability,precisionkeeping,worldalotofcountrycarryonlathehoterror,lathesportandloadoutofshapesoftwareoferrorcompensatetechnicalresearch,takeprecisioncompensate,softwarecompensatemeasureimprove,somemaymakethiskindoferrordispel60%already.Andisdevelopingretrofitconstantly,nanometerisbeingprocessed.
⑶Improvetheresearchofthemachinetoolingproductivity
WorldNClathe,machiningcenterandcorrespondingsomedevelopmentofmainshaft,electricalmachineryofstraightline,measuringsystem,NCsystemofhighspeed,undertheprerequisiteofboostingproductivity。
⑷Whatalotofcountrieshavealreadybeguntothenumericalcontrolsystemmeltintelligently,openly,studynetworkedly
a、elligentresearchofthenumericalcontrolsystem
Mainlyshowinginthefollowingaspects:
Itisintelligentinordertopursuetheefficiencyofprocessingandprocessquality,theself—adaptationtotheprocessingcourseiscontrolled,thecraftparameterproducesresearchautomatically;Jointheconvenientoneinordertoimprovetheperformanceofurginganduseintelligently,tothefeedbackcontrol,adaptiveoperation,discerningautomaticallyloadselectsmodelsautomatically,sincecarriesonresearchwholedefinitely,etc。
oftheelectricalmachineryparameter;Therearesuchresearchoftherespectasintelligentautomaticprogramming,intelligentman-machineinterface,intelligencediagnosing,intelligentmonitoring,etc。
.
b、Thenumericalcontrolsystemmeltsandstudiesopen
Mainlyshowinginthefollowingaspects:
Thedevelopmentofthenumericalcontrolsystemisonunifiedoperationplatform,facethelatheproducerandsupportfinally,throughchanging,increasingorcuttingoutthestructuretarget(numericalcontroltarget),formtheseriation,andcanuseusersspeciallyconvenientlyandthetechnicalknow-howisintegratedinthecontrolsystem,realizetheopennumericalcontrolsystemofdifferentvariety,differentgradefast,formleadingbrandproductswithdistinctdistinction.Systemstructurenormoftheopennumericalcontrolsystematpresent,norm,disposingthenorm,operationplatform,numericalcontrolsystematicfunctionstorehouseandnumericalcontrolsystematicfunctionsoftwaredevelopinginstrument,etc。
arethecoreofpresentresearchtopassthrough.
c、Meetingthemanufacturesystemoftheproductionline,demandfortheinformationintegrationofthemanufacturingcompanynetworkedlygreatlyofnumericalcontrolequipment,itisabasicunitofrealizingthenewmanufacturemodetoo.
2、Classificationofthemachiningcenter
⑴Processaccordingtomainshaftspacepositionwhenitclassifiestobeasfollows,horizontalandverticalmachiningcenter。
Horizontalmachiningcenter,refertothemachiningcenterthattheaxislevelofthemainshaftissetup.Horizontalmachiningcenterfor3—5sportcoordinateaxis,acommononethreerectilinearmotioncoordinateaxisandoneturnthecoordinateaxisofsportsround(turntheworkingbenchround),itcanoneisitisitfinishother4Taxiprocessingbesidesinstallingsurfacesandtopsurfacestoinserttoinstallinworkpiece,mostsuitableforprocessingthecasebodyworkpiece。
Comparedwithstrengthtypemachiningcenterit,thestructureiscomplicated,thefloorspaceislarge,qualityislarge,thepriceishigh。
Verticalmachiningcenter,theaxisofthemainshaftoftheverticalmachiningcenter,inordertosetupvertically,itsstructureismostlytheregularposttype,theworkingbenchissuitableforprocessingpartsfortheslipperyoneofcross,have3rectilinearmotioncoordinateaxisgenerally,canfindaroomforonehorizontalnumericalcontrolrevolvingstage(the4thaxle)ofaxleprocessthespiralpartatworkingbench.Theverticalmachiningcenterisofsimplestructure,thefloorspaceissmall,thepriceislow,afterallocatingvariouskindsofenclosures,cancarryontheprocessingofmostworkpieces.
Large—scalegantrymachiningcenter,themainshaftsaremostlysetupvertically,isespeciallyusedinthelarge—scaleorwithcomplicatedformworkpiece,isitspendthemanycoordinategantrymachiningcentertoneedlikeaviation,aerospaceindustry,someprocessingofpartoflarge-scalesteamturbine。
Fivemachiningcenters,thiskindofmachiningcenterhasfunctionoftheverticalandhorizontalmachiningcenter,oneisitafterinserting,canfinishallfiveTaxiprocessingbesidesinstallingthesurfacetoinstallinworkpiece,theprocessingwaycanmakeformofworkpieceerrorlowest,save2timesinstallandinsertworking,thusimproveproductionefficiency,reducetheprocesscost.
⑵Classifybycraftuse
Isitmillmachiningcentertobore,isitmillforverticaldoorframemachiningcenter,horizontaldoorframemillthemachiningcenterandLongmendoorframemillthemachiningcentertodivideinto。
Processingtechnologyitsrelymainlyonthefactthatthedoorframeismilled,usedincasebody,shellandvariouskindsofcomplicatedpartspecialcurveandlargeprocesses,curvedsurfaceofoutlineprocess,suitableformanyvarietiestoproduceinbatchessmall。
Complexmachiningcenter,pointfivetimesandcompoundandprocessmainly,themainshaftheadcanbeturnedroundautomatically,stand,lieandprocess,afterthemainshaftisturnedroundautomatically,realizeknowingthatvariesinthehorizontalandverticaldirection.
⑶Classifybyspecialfunction
Singleworkingbench,apairofworkingbenchmachiningcenter;
Singleaxle,dualaxle,threeaxlecanchangemachiningcenter,mainshaftofcase;
Transferverticallytothetowermachiningcenterandtransfer;
Onehundredsheetsofstorehousesaddsthemainshaftandchangesoneonehundredsheetsofmachiningcenters;
Onehundredsheetsofstorehousesconnectsandwriteshandstoaddthemainshaftandchangeonehundredsheetsofmachiningcenters;
Onehundredsheetsofstorehousesaddsthemanipulatorandaddsonepairofmainshaftstotransfertothetowermachiningcenter.
3、Developmenttrendofthecurrentnumericalcontrollathe
Atpresent,theadvancedmanufacturingtechnologyintheworldisrisingconstantly,suchapplicationoftechnologyasultrafastcutting,ultraprecisionprocessing,etc.,therapiddevelopmentoftheflexiblemanufacturingsystemandintegratedsystemofthecomputeroneisconstantandripe,haveputforwardhigherdemandtotheprocesstechnologyofnumericalcontrol。
Nowadaysthenumericalcontrollatheisbeingdevelopedinseveralfollowingdirections。
Thespeedandprecisionatahighspeed,highaccuracyaretwoimportantindexesofthenumericalcontrollathe,itconcernsdirectlythatprocessesefficiencyandproductquality。
Atpresent,numericalcontrolsystemadopt-figurenumber,frequencyhighprocessor,inordertoraisebasicoperationspeedofsystem.Meanwhile,adoptthesuperlarge-scaleintegratedcircuitandmanymicroprocessorsstructure,inordertoimprovesystematicdataprocessingability,namelyimproveandinsertthespeedandprecisionofmendingoperation.Adoptthestraightlinemotorandurgethestraightlineofthelatheworkingbenchtobeservotoentertothewaydirectly,itisquitesuperiorthatitsrespondsthecharacteristicatahighspeedanddynamically。
Adoptfeedforwardcontroltechnology,makeitlagbehinderrorreducegreatly,thusimprovethemachiningaccuracycutincornernottotrack.
Formeetultrafastdemandthatprocess,numericalcontrollatheadoptmainshaftmotorandlathestructureformthatmainshaftunitetwointoone,realizefre
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