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1、CNCProfessionalEnglishcontents目录OverviewofCNCTechnologyFundamentalsofCNCProgrammingCNCoperationpracticeApplicationofadvancedmanufacturingtechnologyinthefieldofnumericalcontrolcontents目录VocabularyandexpressionofCNCprofessionalEnglishIndustryFrontierDynamicsandDevelopmentTrends01OverviewofCNCTechnolog
2、yCNCstandsforComputerNumericalControl,whichreferstotheautomatedcontrolofmachiningtools(suchaslathes,millingmachines,andgrinders)bycomputersexecutingpreprogrammedsequencesofmachinecontrolcommandsDefinitionCNCtechnologyhasevolvedfromtheearlyNC(NumericalControl)systemsofthe1950stothemodernCNCsystemsoft
3、odayTheintroductionofmicroprocessorsandadvantagesincomputertechnologyhasbeenallowedforprogressivelycomplexandprecisioncontrolofmachiningprocessesDevelopmentDefinitionandDevelopmentofCNCACNCsystemtypicallyconsistsofacomputercontrolunit,servodrives,motors,sensors,andthemachinetoolitselfThecomputercont
4、rolunitexecutestheprogrammedinstructions,theservodrivesandmotorscontrolthemotionofthemachinetool,andthesensorsprovidefeedbackforprecisepositioningCompositionThemainfunctionsofaCNCsystemincludeinterpretingtheprogrammedinstructions,generatingcontrolsignalsfortheservodrivesandmotors,monitoringthemachin
5、esoperationforerrorsorfaults,andprovidingauserinterfaceforprogrammingandmachineoperationFunctionsCompositionandfunctionsofCNCsystemClassificationCNCmachinetoolscanbeclassifiedbasedontheirtypeofmotion(e.g.,lathes,millingmachines,grindingmachines),thenumberofaxestheycontrol(e.g.,2-axis,3-axis,5-axis),
6、andtheirlevelofcomplexityandsophistication(e.g.,basicCNCmachines,highperformanceCNCmachines)ApplicationfieldsCNCmachinetoolsarewidelyusedinmanufacturingindustriessuchasautomotive,aerospace,moldmaking,andgeneralmachiningTheyarealsousedinprototyping,researchanddevelopment,andeducationandtrainingThepre
7、cisionandreproducibilityofCNCmachiningmakeitanidealtechnologyforcomplexpartsproductionandhighvolumemanufacturingClassificationandapplicationfieldsofCNCmachinetools02FundamentalsofCNCProgrammingG-code01AwidelyusedprogramminglanguageforCNCmachining,whichstandsforGeometriccode.Itisalanguagethatcontrols
8、themovementofthemachinetoolM-code02AprogramminglanguageusedinCNCmachiningthatcontrolsmissingfunctionssuchasspinspeed,coolant,andtoolchangeISO698303AninternationalstandardforCNCprogramminglanguages,whichspecifiestheformatandsyntaxofG-codeandM-codeProgrammingLanguagesandStandardsWorkpieceanalysisUnder
9、standingthematerialproperties,dimensions,andtolerancesoftheworkpiecetodeterminethebestmachiningstrategyToolpathplanningDeterminingthesequenceoftoolmovementsandtheassociatedcuttingparameterstoachievethedesiredshapeandfinishMachinecapabilityanalysisAssessingthecapabilitiesoftheCNCmachinetoensurethatit
10、canexecutetheplannedtoolpathsaccuratelyandeffectivelyProcessingTechnologyAnalysisandPlanningToolselectionandcuttingparametersettingsMonitoringtoolwearandreplacingtoolsasneededtomaintainmachiningaccuracyandefficiencyToollifemanagementChoosingtheappropriatetoolforthematerialbeingmachined,consideringfa
11、ctorssuchastoolmaterial,geometry,andcoatingToolselectionSettingthecuttingspeed,feedrate,anddepthofcutbasedonthetoolandworkpiecematerialtooptimizemachiningefficiencyandtoollifeCuttingparameters03CNCoperationpracticeBasicoperationinterfaceIntroductiontothelayout,function,andoperationmethodoftheCNCsyst
12、emoperationinterfaceExplanationofmanualoperationfunctionssuchasjoining,scaffoldoperation,andMDIoperationIntroductiontoautomaticoperationfunctionssuchasprogramediting,programloading,automaticprocessing,andtoolcompensationManualoperationfunctionsAutomaticoperationfunctionsOperationinterfaceandfunction
13、introductionRealtimemonitoringofprocessingstatusUseofCNCsystemmonitoringfunctionstoobservethereal-timeprocessingstatusofthemachinetool,includingspindlespeed,feedrate,toolposition,etcAnalysisofprocessingdataCollectionandanalysisofprocessingdatasuchascuttingforce,vibration,andtemperaturetoevaluatethes
14、tabilityandefficiencyofthemachiningprocessOptimizationofprocessingparametersAdjustmentofprocessingparameterssuchasspinspeed,feedrate,cuttingdepth,andtoolselectiontoimprovemachiningefficiencyandreducetoolwearProcessmonitoringandoptimizationCommonfaultsandtroubleshootingmethodsIntroductiontocommonfaul
15、tsaccountedforinCNCmachining,suchasspinfailures,feedsystemfailures,toolchangefailures,etc.,andcorrespondingtroubleshootingmethodsUseofdiagnostictoolsUseofCNCsystemdiagnostictoolstoassistinfaultdiagnosis,suchasalarminformationdisplay,parameterdisplay,andPLCstatusdisplayPreventivemaintenancemeasuresIn
16、troductiontopreventivemaintenancemeasuressuchasregularinspectionandmaintenanceofthemachinetool,replacementofwornparts,cleaningofthecoolingsystem,etc.,toreducetheoccurrenceoffaultsFaultdiagnosisandtroubleshootingmethods04ApplicationofadvancedmanufacturingtechnologyinthefieldofnumericalcontrolAdvantagesofhighspeedcuttingtechnologyImprovingmachiningefficiency,reducingmachiningtime,andenhancingsurfacequalityKeytechnologiesofhighspeedcuttingHighspeedspinningtechnology,highspeedfeedtechnology,andhighs
