中英文文献翻译加工中心数控技术.docx

中英文文献翻译加工中心数控技术.docx

《中英文文献翻译加工中心数控技术.docx》由会员分享，可在线阅读，更多相关《中英文文献翻译加工中心数控技术.docx（16页珍藏版）》请在冰豆网上搜索。

中英文文献翻译加工中心数控技术

Reference:

classificationandtheirrespectivecharacteristicsofncmachiningcenter

Press:

chemicalindustrypress;Version1（March16,2009）

Author:

XuHeng,DuanXiaoxu

Machiningcenterisatypicalsetofhigh-techmachiningequipmentinone,itsdevelopmentrepresentsacountry'slevelofdesignandmanufacturegreatlyimprovedlaborproductivity,reducelaborcosts,improvedworkingenvironmentandreducethelaborofworkersstrength.Thismovementthroughthedifferentprogramsandthedesignofvariouscomponentsofqualitativeanalysisandcomparisonofverticalmachiningcenterstodeterminetheprogressofeducationtodrivetheprogramare:

fixed-bedbody,spindleseatinstalledbyinstallingtheslidingseatrailbed,userollingguiderailbedcanbeachievedtothemovementintotheYdirection.PrecisionCNCXYtablebyatwo-waydrivetocompletetheworkpieceX,Ytwodirectionsintoamovement;X,Y,Zthreedirectionsofmovementareballscrewfeed,drivenbyACservomotor.Guides,ballscrewswiththecorrespondinglubrication,protectionandotherdevices.

Processingcenter（EnglishabbreviateisCNCcalledComputerizedNumericalControl）:

isthelibrarywithaknifeandautomatictoolchangerofahighlyautomatedmultifunctionnumericalcontrolmachinetool.InChina,Hongkong,TaiwanandGuangdonggenerationalsohasmanypeoplecallitthecomputergongs.

Workpieceinmachiningcenterbyaclamping,digitalcontrolsystemcancontrolthemachinetoolaccordingtodifferentprocess,automaticselectionandreplacementoftools,automaticallychangethespindlespeed,feedrateandcuttingtoolrelativetotheworkpiecemovementtrackandotherauxiliaryfunctions,followedbythecompletionofseveralsurfaceworkpiecemultipleprocessingprocedures.Andthereareavarietyofchangingknifeorbladeselectionfunction,therebygreatlyimprovingtheproductionefficiency.

MachiningcenterCNCmachinetoolisprovidedwithacomputernumericalcontrolsystemofmachinetools,CNCsystemcapableofprocessingprocedures,controlmachinetoolstocompleteavarietyofactions.Comparedwiththegeneralmachinetools,CNCmachinetoolstocompletetheplanecurveandspacecurvesurfacemachining,themachiningprecisionandtheproductionefficiencyisrelativelyhigh,soithasbeenwidelyapplied.

ThecompositionofCNCmachinetools

Ingeneral,numericalcontrolmachinetooliscomposedofamechanicalpart,adigitalcontrolcomputer,servosystem,PCcontrolpart,hydraulicpressuredrivesystem,coolingandlubricationanddischargedevice.CNCmachinetooliscontrolledbyaprogram,partoftheprogrammingworkistheimportantpartofNCmachinetool.ServosystemofCNCmachinetoolisdriveninpart,computeroutputcontrolcommandisgeneratedbytheservosystemcoordinatemovement.Ordinaryverticalmachiningcenterwiththreeservomotorstorespectivelydriveworkbench,longitudinal,transverseworktable,spindleboxalongtheXdirection,Y,Ztoexercise.X,Y,Zaremutuallyverticalcoordinateaxis,sowhenthemachinethreecoordinatelinkagecanmachiningspacecurvedsurface.AndforthefiveaxislinkageCNCmachine,isaBaxisandCaxis.TheYaxisofrotationoftheshaftastheaxisB,ZaxisofrotationoftheshaftastheCaxis.

TheprocessingofCNCmachinetoolsmotion

Machiningbycuttingthemainmovementandfeedmotorcomplete,controlthemainmovementcanbeareasonablespeed,tocontrolthefeedcanobtainallkindsofdifferentmachiningsurface.CNCmachinetoolcoordinatemotionismotion,forthethreecoordinateNCmachinetool,thecoordinatesofthedirectionofmovementisusuallyperpendiculartoeachother,wherebytherespectivealongtheCartesiancoordinatesX,Y,Zaxispositiveandnegativedirection.Howtocontrolthemovingcoordinatesystemtocompletedifferentkindsofspatialcurvedsurfaceprocessingisthemaintaskofdigitalcontrol.Asweallknow,inthethree-dimensionalCartesiancoordinates,spaceanypointcanbeusedX,Y,Zcoordinatevaluestoindicate,toaspacecurvecanalsousethethree-dimensionalcoordinatefunctiontoexpress.Howtocontroltheaxisofmovementtofinishmachiningofcurvedsurface?

Nowtointroduceit.

Curvedsurfacecuttingtoolmovingtrajectoryandtheoreticcurvesdonotcoincide,butanapproximationline.Duetovariousinterpolationformulaisdifferent,theapproximationofthelinearealsodifferent,usuallyhasthefollowingseveralcalculationmethods:

pointbypointcomparisonmethod,integrationmethodandtimedivisionmethod.

Theadvantages,disadvantagesofNCmachinetool

CNCmachinetoolhasmanyadvantages,itisdevelopingveryquickly,becomethedominantmachinemachining.

（1）machiningwithNCmachinetoolcanachievegoodaccuracy,stableprocessingquality

CNCmachinetooltransmissionparts,particularlyabal