数控技术双语4.ppt

数控技术双语4.ppt

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ElectromechanicalEngineeringCollegeElectromechanicalEngineeringCollegeHenanHenanUniversityofScienceandTechnologyUniversityofScienceandTechnologyNUMERICALCONTROLTECHNOLOGYNUMERICALCONTROLTECHNOLOGY韩建海11数控技术CChhaapptteerr44CCNNCCUUnniittChapter4COMPUTERNUMERICALCONTROLUNIT4.1、Introduction4.2、HardwareArchitectureofCNCUnit4.3、CNCSystemSoftware4.4、PLCfunctionsinCNCUnit4.5、Human-MachineInterfaceandOperationSequenceofCNCSystem4.6、OpenArchitectureSystemforCNCUnit22数控技术CChhaapptteerr44CCNNCCUUnniittChapter4COMPUTERNUMERICALCONTROLUNITToday,computernumericalcontrol（CNC）Today,computernumericalcontrol（CNC）machinesarefoundalmosteverywhere,frommachinesarefoundalmosteverywhere,fromsmalljobshopsinruralcommunitiestosmalljobshopsinruralcommunitiestoFortune500companiesinlargeurbanareas.Fortune500companiesinlargeurbanareas.Truly,thereishardlyafacetofTruly,thereishardlyafacetofmanufacturingthatisnotinsomewaymanufacturingthatisnotinsomewaytouchedbywhattheseinnovativemachinecantouchedbywhattheseinnovativemachinecando.Everyoneinvolvedinthemanufacturingdo.Everyoneinvolvedinthemanufacturingenvironmentshouldbewellawareofwhatisenvironmentshouldbewellawareofwhatispossiblewiththesesophisticatedtools.possiblewiththesesophisticatedtools.33数控技术CChhaapptteerr44CCNNCCUUnniittChapter4COMPUTERNUMERICALCONTROLUNITInthischapter,wewillexplorethebasicsofInthischapter,wewillexplorethebasicsofthecoreofCNCmachinetoolthecoreofCNCmachinetoolCNCunit,showingyouCNCunit,showingyoumuchofwhatisinvolvedwithitsfunctions,workingmuchofwhatisinvolvedwithitsfunctions,workingprinciples,hardwareconfigurationandsoftwareprinciples,hardwareconfigurationandsoftwarestructure.WithsomanytypesofCNCmachinetoolsstructure.WithsomanytypesofCNCmachinetoolsandCNCunitsinexistence,itisnexttoimpossibleandCNCunitsinexistence,itisnexttoimpossibleforthischaptertobeextremelyspecificaboutanyforthischaptertobeextremelyspecificaboutanyoneparticulartype.Thekeyconceptsallowustooneparticulartype.ThekeyconceptsallowustoviewthemainfeaturesofCNCunitinmoregeneralviewthemainfeaturesofCNCunitinmoregeneralterms,stressingwhythingsarehandledthewaytheyterms,stressingwhythingsarehandledthewaytheyareevenmorethanthespecifictechniquesusedwithareevenmorethanthespecifictechniquesusedwithanyoneparticularCNCmachinetool.WiththisbroadanyoneparticularCNCmachinetool.Withthisbroadbackground,youshouldbeeasilyzeroinonanykindbackground,youshouldbeeasilyzeroinonanykindofCNCmachinetoolyouwillbeworkingwith.ofCNCmachinetoolyouwillbeworkingwith.44数控技术CChhaapptteerr44CCNNCCUUnniittChapter4COMPUTERNUMERICALCONTROLUNIT4.1、IntroductionMachinecontrolsaredividedintotwotypes:

Machinecontrolsaredividedintotwotypes:

numericalcontrol（NC）andcomputernumericalnumericalcontrol（NC）andcomputernumericalcontrol（CNC）.NCcontrolshavetoreadtheprogramcontrol（CNC）.NCcontrolshavetoreadtheprogrameachtimeapartisrun;theyhavenomeansofeachtimeapartisrun;theyhavenomeansofeditingexistingprograms.CNCcontrolscanstoreeditingexistingprograms.CNCcontrolscanstoreandalloweditingofloadedprograms.Allmachinesandalloweditingofloadedprograms.AllmachinesbuilttodayareCNCmachines.CNCunitistheheartbuilttodayareCNCmachines.CNCunitistheheartofCNCmachine.Nevertheless,inordertoaidtoofCNCmachine.Nevertheless,inordertoaidtounderstandtheworkingprinciplesofCNCunit,itunderstandtheworkingprinciplesofCNCunit,itisnecessarythattheprinciplesofNCsystembeisnecessarythattheprinciplesofNCsystembeintroducedfirstly.introducedfirstly.55数控技术CChhaapptteerr44CCNNCCUUnniittChapter4COMPUTERNUMERICALCONTROLUNIT4.1、IntroductionTheNCmachinecanbedividedintothreebasicareas.Thefirstareaisthecontrolunit,whichprocessesthecommandfromtheinputmedia.Thesecondareaisthedrivemechanisms,andthelastareaisthemachineitself.4.1.1NCsystem66数控技术CChhaapptteerr44CCNNCCUUnniittChapter4COMPUTERNUMERICALCONTROLUNIT4.1、IntroductionThemostbasicfunctionofanyNCmachineThemostbasicfunctionofanyNCmachineisautomatic,precise,andconsistentmotionisautomatic,precise,andconsistentmotioncontrol.AllformsofNCequipmenthavetwocontrol.AllformsofNCequipmenthavetwoormoredirectionsofmotion,calledaxes.ormoredirectionsofmotion,calledaxes.TheseaxescanbepreciselyandautomaticallyTheseaxescanbepreciselyandautomaticallypositionedalongtheirlengthsoftravel.Thepositionedalongtheirlengthsoftravel.Thetwomostcommonaxistypesarelinear（driventwomostcommonaxis