
Maintenance of CNC machine tools
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- Time of issue:2020-02-13 10:11
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(Summary description)VarioustypesofCNCmachinetoolshavedifferentcharacteristicsduetotheirdifferentfunctions,structuresandsystems.Itsmaintenancecontentandrulesalsohavetheirowncharacteristics,andshouldbebasedonthetype,modelandactualuseofthemachinetool,andinaccordancewiththerequirementsofthemachinetoolmanual,formulateandestablishthenecessaryregular,gradedmaintenancesystem.Thefollowingaresomecommonandcommondailymaintenancepoints.SowhatarethemainmaintenancecontentsofCNCmachinetools? MaintenanceofCNCsystem: 1)Strictcompliancewithoperatingproceduresandroutinemaintenancesystems 2)ThedoorofCNCcabinetandstrongcurrentcabinetshouldbeopenedasfewaspossible Oilmist,dustandevenmetalpowderaregenerallyfoundintheairofmachiningworkshops.OncetheyfallonthecircuitboardsorelectronicdevicesintheCNCsystem,itiseasytocausetheinsulationresistancebetweencomponentstodrop,andevencausedamagetocomponentsandcircuitboards..Inthesummer,inordertomaketheCNCsystemworkoverloadforalongtime,itisnecessarytoopenthedooroftheCNCcabinettodissipateheat.Thisisahighlyundesirablemethod,whichwilleventuallycauseaccelerateddamagetotheCNCsystem. 3)RegularlycleanthecoolingandventilationsystemoftheCNCcabinet YoushouldcheckwhethereachcoolingfanontheCNCcabinetworksnormally.Checktheairductfilterforblockageeverysixmonthsorquarter.Iftoomuchdustaccumulatesonthefilternetanddoesnotcleanitintime,itwillcausethetemperatureintheCNCcabinettobetoohigh. 4)Periodicmaintenanceoftheinput/outputdeviceoftheCNCsystem MostoftheCNCmachinetoolsproducedbeforethe1980swereequippedwithaphotoelectricpapertapereader.Ifthetapereadingpartiscontaminated,itwillcauseerrorsinreadingtheinformation.Forthisreason,thephotoelectricreadermustbemaintainedinaccordancewithregulations.ContentsofmaintenanceofCNCmachinetools 5)PeriodicinspectionandreplacementofDCmotorbrushes ThetransientwearofDCmotorbrusheswillaffecttheperformanceofthemotorandevencausedamagetothemotor.Forthisreason,themotorbrushesshouldberegularlycheckedandreplaced.CNClathes,CNCmillingmachines,machiningcenters,etc.shouldbeinspectedannually. 6)Regularlychangethestoragebattery Ingeneralnumericalcontrolsystems,aCMOSRAMstoragedeviceisprovidedwitharechargeablebatterymaintenancecircuittoensurethatthecontentsofitsmemorycanbemaintainedduringperiodswhenthesystemisnotpowered.Ingeneral,evenifithasnotexpired,itshouldbereplacedonceayeartoensurethatthesystemworksproperly.ThebatteryshouldbereplacedunderthepowersupplyoftheCNCsystemtopreventtheinformationinRAMfrombeinglostduringthereplacement. 7)Maintenanceofsparecircuitboards Whenthespareprintedcircuitboardisnotusedforalongtime,itshouldbeinstalledintheCNCsystemforaperiodoftimetopreventdamage. Maintenanceofmechanicalparts: 1)Maintenanceofmaindrivechain Regularlyadjustthetightnessofthespindledrivebelttopreventslippagecausedbybeltslipping;checktheconstanttemperatureoiltankofthespindlelubrication,adjustthetemperaturerange,replenishtheamountofoilintime,andcleanthefilter;afterlong-termuseofthetoolclampingdeviceinthespindleTherewillbeagap,whichwillaffecttheclampingofthetool.Itisnecessarytoadjustthedisplacementofthepistonofthehydrauliccylinderintime. 2)Maintenanceofballscrewthreadpair Regularlycheckandadjusttheaxialclearanceofthescrewthreadpairtoensuretheaccuracyofreversetransmissionandaxialrigidity;regularlycheckwhethertheconnectionbetweenthescrewandthebedisloose;replacethescrewprotectiondeviceintimetopreventdustorChipsenter. 3)Maintenanceoftoolmagazineandtoolchangingrobot Itisstrictlyforbiddentoputoverweightandlongtoolsinthetoolmagazinetoavoidtherobotdroppingorthetoolcollidingwiththeworkpieceandfixturewhenchangingthetool;oftencheckwhetherthereturnpositionofthetoolmagazineiscorrectandthepositionofthetoolspindlereturnpointInplace,andadjustintime;whenthemachineisturnedon,thetoolmagazineandthemanipulatorshouldberundrytocheckwhethereachpartisworkingproperly,especiallywhetherthestrokeswitchandsolenoidvalvecanworknormally;Normally,itshouldbehandledintime. Maintenanceofhydraulicandpneumaticsystems: Regularlycleanorreplacethefiltersorsub-filtersofvariouslubrication,hydraulic,andpneumaticsystems;regularlyperformoilqualityinspectionandreplacementofhydraulicoilonthehydraulicsystem;andregularlydividetheairfilterintotheairfilteranddischargethewater; Maintenanceofmachinetoolaccuracy: Regularlycheckandcorrectmachinelevelandmechanicalaccuracy.Therearetwomethodsofcorrectingmechanicalaccuracy:hardandsoft.Itssoftmethodismainlycompensatedbysystemparameters,suchasscrewbacklashcompensation,fixed-pointcompensationforeachcoordinatepositioningaccuracy,andmachinetoolreferencepointpositioncorrection,etc.;hardmethodsaregenerallyperformedduringmachinetooloverhaul,suchasrailrepair,ballrollingPre-tighteningofthescrewnutpair,adjustmentofbacklash,etc.
Maintenance of CNC machine tools
(Summary description)VarioustypesofCNCmachinetoolshavedifferentcharacteristicsduetotheirdifferentfunctions,structuresandsystems.Itsmaintenancecontentandrulesalsohavetheirowncharacteristics,andshouldbebasedonthetype,modelandactualuseofthemachinetool,andinaccordancewiththerequirementsofthemachinetoolmanual,formulateandestablishthenecessaryregular,gradedmaintenancesystem.Thefollowingaresomecommonandcommondailymaintenancepoints.SowhatarethemainmaintenancecontentsofCNCmachinetools? MaintenanceofCNCsystem: 1)Strictcompliancewithoperatingproceduresandroutinemaintenancesystems 2)ThedoorofCNCcabinetandstrongcurrentcabinetshouldbeopenedasfewaspossible Oilmist,dustandevenmetalpowderaregenerallyfoundintheairofmachiningworkshops.OncetheyfallonthecircuitboardsorelectronicdevicesintheCNCsystem,itiseasytocausetheinsulationresistancebetweencomponentstodrop,andevencausedamagetocomponentsandcircuitboards..Inthesummer,inordertomaketheCNCsystemworkoverloadforalongtime,itisnecessarytoopenthedooroftheCNCcabinettodissipateheat.Thisisahighlyundesirablemethod,whichwilleventuallycauseaccelerateddamagetotheCNCsystem. 3)RegularlycleanthecoolingandventilationsystemoftheCNCcabinet YoushouldcheckwhethereachcoolingfanontheCNCcabinetworksnormally.Checktheairductfilterforblockageeverysixmonthsorquarter.Iftoomuchdustaccumulatesonthefilternetanddoesnotcleanitintime,itwillcausethetemperatureintheCNCcabinettobetoohigh. 4)Periodicmaintenanceoftheinput/outputdeviceoftheCNCsystem MostoftheCNCmachinetoolsproducedbeforethe1980swereequippedwithaphotoelectricpapertapereader.Ifthetapereadingpartiscontaminated,itwillcauseerrorsinreadingtheinformation.Forthisreason,thephotoelectricreadermustbemaintainedinaccordancewithregulations.ContentsofmaintenanceofCNCmachinetools 5)PeriodicinspectionandreplacementofDCmotorbrushes ThetransientwearofDCmotorbrusheswillaffecttheperformanceofthemotorandevencausedamagetothemotor.Forthisreason,themotorbrushesshouldberegularlycheckedandreplaced.CNClathes,CNCmillingmachines,machiningcenters,etc.shouldbeinspectedannually. 6)Regularlychangethestoragebattery Ingeneralnumericalcontrolsystems,aCMOSRAMstoragedeviceisprovidedwitharechargeablebatterymaintenancecircuittoensurethatthecontentsofitsmemorycanbemaintainedduringperiodswhenthesystemisnotpowered.Ingeneral,evenifithasnotexpired,itshouldbereplacedonceayeartoensurethatthesystemworksproperly.ThebatteryshouldbereplacedunderthepowersupplyoftheCNCsystemtopreventtheinformationinRAMfrombeinglostduringthereplacement. 7)Maintenanceofsparecircuitboards Whenthespareprintedcircuitboardisnotusedforalongtime,itshouldbeinstalledintheCNCsystemforaperiodoftimetopreventdamage. Maintenanceofmechanicalparts: 1)Maintenanceofmaindrivechain Regularlyadjustthetightnessofthespindledrivebelttopreventslippagecausedbybeltslipping;checktheconstanttemperatureoiltankofthespindlelubrication,adjustthetemperaturerange,replenishtheamountofoilintime,andcleanthefilter;afterlong-termuseofthetoolclampingdeviceinthespindleTherewillbeagap,whichwillaffecttheclampingofthetool.Itisnecessarytoadjustthedisplacementofthepistonofthehydrauliccylinderintime. 2)Maintenanceofballscrewthreadpair Regularlycheckandadjusttheaxialclearanceofthescrewthreadpairtoensuretheaccuracyofreversetransmissionandaxialrigidity;regularlycheckwhethertheconnectionbetweenthescrewandthebedisloose;replacethescrewprotectiondeviceintimetopreventdustorChipsenter. 3)Maintenanceoftoolmagazineandtoolchangingrobot Itisstrictlyforbiddentoputoverweightandlongtoolsinthetoolmagazinetoavoidtherobotdroppingorthetoolcollidingwiththeworkpieceandfixturewhenchangingthetool;oftencheckwhetherthereturnpositionofthetoolmagazineiscorrectandthepositionofthetoolspindlereturnpointInplace,andadjustintime;whenthemachineisturnedon,thetoolmagazineandthemanipulatorshouldberundrytocheckwhethereachpartisworkingproperly,especiallywhetherthestrokeswitchandsolenoidvalvecanworknormally;Normally,itshouldbehandledintime. Maintenanceofhydraulicandpneumaticsystems: Regularlycleanorreplacethefiltersorsub-filtersofvariouslubrication,hydraulic,andpneumaticsystems;regularlyperformoilqualityinspectionandreplacementofhydraulicoilonthehydraulicsystem;andregularlydividetheairfilterintotheairfilteranddischargethewater; Maintenanceofmachinetoolaccuracy: Regularlycheckandcorrectmachinelevelandmechanicalaccuracy.Therearetwomethodsofcorrectingmechanicalaccuracy:hardandsoft.Itssoftmethodismainlycompensatedbysystemparameters,suchasscrewbacklashcompensation,fixed-pointcompensationforeachcoordinatepositioningaccuracy,andmachinetoolreferencepointpositioncorrection,etc.;hardmethodsaregenerallyperformedduringmachinetooloverhaul,suchasrailrepair,ballrollingPre-tighteningofthescrewnutpair,adjustmentofbacklash,etc.
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2020-02-13 10:11
- Views:
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