The characteristics and maintenance ideas of imported CNC machine tools
- classification:Industry news
- 作者:
- 来源:
- Time:2019-07-10
- 访问量:6
【Summary Description】First,donotblindlybelieveinthequalityofimportedCNCequipment ImportedCNCequipmentismostlytheproductoftoday'smostcutting-edgetechnologyapplications.However,duetotherushofmanufacturers,thereisnotenoughtime-testing,andthereareinevitablysomeimperfectionsindesignandmanufacturing.ThecylinderborehoningmachinepurchasedfromGEHRINGCompanyofGermanyadoptsadvancednumericalcontrolhydraulicservotechnologytobettersolvetheclosed-loopcontrolofthemeshangle,depth,cylinderborediameterandcylindricity.Thecompanyisaworld-renownedcompany,anditsnewlydevelopedlaserhoningtechnologyisbeingtestedattheMercedes-Benzfactory.Itisreportedtobeverysuccessful.However,itistheequipmentproducedbysuchawell-knowncompany.Aftermorethanoneyearofuse,thereareoftensomeunexplainedfailuressuchassuddeninterruptionofoperationandequipmentparking.Sometimesitwillreturntonormalafterrestarting,sometimesitwillbenormalafterrepeatedtimes,sometimesthereisnoproblemforaperiodoftime,sometimesitiscontinuous.Thealarmmessageindicatesa"SYSTEMCOMMUNICATION"systemcommunicationfailure. ThecharacteristicsandmaintenanceideasofimportedCNCmachinetools Thisphenomenonisgenerallyreferredtoasa"softfault."Atfirst,itwassuspectedthatitwascausedbygridnoiseandharmonicinterference,andthequalityofthegridwastested.Thetestreportshowsthatthegridharmonicsareexceededandfilteringisrecommended.Undernormalcircumstances,theharmonicqualityofthepowergridismostlyexceeded.Gridinterferenceisonlyanexternalcause,andtheoverallanti-interferenceperformanceofthesystemistheinternalcause.MostimportedCNCequipmenthassimplegridnoisefilteringtechnology.Aftermorethanoneyear,theproblemissolved,indicatingthatthesystemcanresistexternalinterference.Nowadays,eithertheexternalinterferencebecomesstrongerorthesystem'santi-jammingperformanceisworse.FromthenormaloperationofotherimportedCNCequipmentinthefactory,itislikelytobeasystemproblem.WhentestingtheGEHA25module,itwasfoundthatthemodulehadobstaclesduringpower-oncommunication,theconnectionspeedwasslow,andtheanti-interferenceperformancewaspoor,butitwasignoredbythehost.Afterreplacinganewmodule,thedevicerunsstablyandthefaultdisappears. Originally,thisCNC-GOPsystemisapatentedproductjointlydevelopedbyGEHRINGandSIEMENS.Ithasstrongspecialfunctions,convenientcontrolandstableperformance.Becauseitisanewlydevelopedsystem,ithasnotpassedsufficienttimetest,andithasanti-interferenceandpoorstability.Infact,therearemanysimilarproblemsinthemanufacturersofequipmentmanufacturingtechnology.Therefore,wecannotblindlyworshipWesternhightechnology.Wemustseethatevenadvancedtechnologiesarestilldeveloping,andtheremaystillbedefects.Themoreadvancedthetechnology,themorelikelyitistobedefective.WhenrepairingimportedCNCequipment,itisnecessarytorecognizeitstechnologicaladvancementandtoseeitsdeficienciesinarealisticmanner. Second,youmustreadthealarminformationanalytically. Thecontrolpartofthenumericalcontrolsystemoftheimportedequipmentisdesignedrigorously.Aseeminglysmallanomalywillalsoreceivethealarmentryandmaycausethemachinetostop.IntheprocessofactuallyrepairingimportedCNCequipment,readingthealarminformationisthemostbasicandconvenientmethodforseekingquickrepair.Butnoteverypieceofinformationiscredible,andeverypieceofinformationcanbeused.Inthenumerousalarmmessages,therearemanythatmaybeuselessorevenmisleadingformaintenance.Itisnecessarytobegoodatextractingfineinformationfromthesemessages. Forexample,theCNCcamgrinderproducedbySCHAUDTinGermanyisaCBNgrindingmachinewithagrindingcamtype.Everytimeyouturniton,therewillbealotofalarms.Infact,theyarealljuststartingup.Therearealotofpreparationconditionsthatarenotsatisfiedyet.Ithasnopracticalsignificance. Once,themachinealarmshowsthatthe"Filterofoildirty"staticpressuresystemfilterisdirty.Theequipmentspindleslideusesstaticpressurefloatingguides.Thefilterwasremovedandcleaned,butitwasstillalarmedafterinstallation;anewfilterwasinstalledandthealarmcouldnotbeeliminated.CarefullycheckthePLCalarmcode,andfindoutthatthefaultalarmconditionisthatthepressuresensorofthestaticpressurefloatingraildoesnotwork.Thefaultdesignexplanationisthatwhenthepressuresensordoesnotsensethepressure,itisunderstoodthatthefilterisblocked.Butbycarefulinspection,thefilterisgood,justbecausethereisaproblemwiththepressuresensor,thesignalissentwithoutsignal. ThegiveninformationofanalarmisobtainedbythedesignerbasedonthePCsimulation.Itisnothisexperienceofon-sitemaintenanceformanyyears.Itisoftendesignedaccordingtotheconventionallogic,withthedesigner'spersonalunderstandingofthesimulationresults.However,theoccurrenceoffaultsisoftenunexpected,oritisnecessarytoreasonandjudgebasedonfaultphenomenaandrandomdata.Thecorrectattitudetothealarminformationprovidedbythemachineis:Donotbelieveit,butnotbelieveit.Donottrustthealarminformation,donotfallintothetrapoffalsealarminformation. Third,afullbackupmustbemadewhenthemachineisfirstused. ImportedCNCequipmentmostlyusesmodernmicroelectronicsnumericalcontroltechnologyandismanagedbyPC.ItshouldbesaidthattheCNCmachinemanagesCNC-PLCandOPsystem,whichgreatlyimprovestheoperationperformanceandmain
The characteristics and maintenance ideas of imported CNC machine tools
【Summary Description】First,donotblindlybelieveinthequalityofimportedCNCequipment ImportedCNCequipmentismostlytheproductoftoday'smostcutting-edgetechnologyapplications.However,duetotherushofmanufacturers,thereisnotenoughtime-testing,andthereareinevitablysomeimperfectionsindesignandmanufacturing.ThecylinderborehoningmachinepurchasedfromGEHRINGCompanyofGermanyadoptsadvancednumericalcontrolhydraulicservotechnologytobettersolvetheclosed-loopcontrolofthemeshangle,depth,cylinderborediameterandcylindricity.Thecompanyisaworld-renownedcompany,anditsnewlydevelopedlaserhoningtechnologyisbeingtestedattheMercedes-Benzfactory.Itisreportedtobeverysuccessful.However,itistheequipmentproducedbysuchawell-knowncompany.Aftermorethanoneyearofuse,thereareoftensomeunexplainedfailuressuchassuddeninterruptionofoperationandequipmentparking.Sometimesitwillreturntonormalafterrestarting,sometimesitwillbenormalafterrepeatedtimes,sometimesthereisnoproblemforaperiodoftime,sometimesitiscontinuous.Thealarmmessageindicatesa"SYSTEMCOMMUNICATION"systemcommunicationfailure. ThecharacteristicsandmaintenanceideasofimportedCNCmachinetools Thisphenomenonisgenerallyreferredtoasa"softfault."Atfirst,itwassuspectedthatitwascausedbygridnoiseandharmonicinterference,andthequalityofthegridwastested.Thetestreportshowsthatthegridharmonicsareexceededandfilteringisrecommended.Undernormalcircumstances,theharmonicqualityofthepowergridismostlyexceeded.Gridinterferenceisonlyanexternalcause,andtheoverallanti-interferenceperformanceofthesystemistheinternalcause.MostimportedCNCequipmenthassimplegridnoisefilteringtechnology.Aftermorethanoneyear,theproblemissolved,indicatingthatthesystemcanresistexternalinterference.Nowadays,eithertheexternalinterferencebecomesstrongerorthesystem'santi-jammingperformanceisworse.FromthenormaloperationofotherimportedCNCequipmentinthefactory,itislikelytobeasystemproblem.WhentestingtheGEHA25module,itwasfoundthatthemodulehadobstaclesduringpower-oncommunication,theconnectionspeedwasslow,andtheanti-interferenceperformancewaspoor,butitwasignoredbythehost.Afterreplacinganewmodule,thedevicerunsstablyandthefaultdisappears. Originally,thisCNC-GOPsystemisapatentedproductjointlydevelopedbyGEHRINGandSIEMENS.Ithasstrongspecialfunctions,convenientcontrolandstableperformance.Becauseitisanewlydevelopedsystem,ithasnotpassedsufficienttimetest,andithasanti-interferenceandpoorstability.Infact,therearemanysimilarproblemsinthemanufacturersofequipmentmanufacturingtechnology.Therefore,wecannotblindlyworshipWesternhightechnology.Wemustseethatevenadvancedtechnologiesarestilldeveloping,andtheremaystillbedefects.Themoreadvancedthetechnology,themorelikelyitistobedefective.WhenrepairingimportedCNCequipment,itisnecessarytorecognizeitstechnologicaladvancementandtoseeitsdeficienciesinarealisticmanner. Second,youmustreadthealarminformationanalytically. Thecontrolpartofthenumericalcontrolsystemoftheimportedequipmentisdesignedrigorously.Aseeminglysmallanomalywillalsoreceivethealarmentryandmaycausethemachinetostop.IntheprocessofactuallyrepairingimportedCNCequipment,readingthealarminformationisthemostbasicandconvenientmethodforseekingquickrepair.Butnoteverypieceofinformationiscredible,andeverypieceofinformationcanbeused.Inthenumerousalarmmessages,therearemanythatmaybeuselessorevenmisleadingformaintenance.Itisnecessarytobegoodatextractingfineinformationfromthesemessages. Forexample,theCNCcamgrinderproducedbySCHAUDTinGermanyisaCBNgrindingmachinewithagrindingcamtype.Everytimeyouturniton,therewillbealotofalarms.Infact,theyarealljuststartingup.Therearealotofpreparationconditionsthatarenotsatisfiedyet.Ithasnopracticalsignificance. Once,themachinealarmshowsthatthe"Filterofoildirty"staticpressuresystemfilterisdirty.Theequipmentspindleslideusesstaticpressurefloatingguides.Thefilterwasremovedandcleaned,butitwasstillalarmedafterinstallation;anewfilterwasinstalledandthealarmcouldnotbeeliminated.CarefullycheckthePLCalarmcode,andfindoutthatthefaultalarmconditionisthatthepressuresensorofthestaticpressurefloatingraildoesnotwork.Thefaultdesignexplanationisthatwhenthepressuresensordoesnotsensethepressure,itisunderstoodthatthefilterisblocked.Butbycarefulinspection,thefilterisgood,justbecausethereisaproblemwiththepressuresensor,thesignalissentwithoutsignal. ThegiveninformationofanalarmisobtainedbythedesignerbasedonthePCsimulation.Itisnothisexperienceofon-sitemaintenanceformanyyears.Itisoftendesignedaccordingtotheconventionallogic,withthedesigner'spersonalunderstandingofthesimulationresults.However,theoccurrenceoffaultsisoftenunexpected,oritisnecessarytoreasonandjudgebasedonfaultphenomenaandrandomdata.Thecorrectattitudetothealarminformationprovidedbythemachineis:Donotbelieveit,butnotbelieveit.Donottrustthealarminformation,donotfallintothetrapoffalsealarminformation. Third,afullbackupmustbemadewhenthemachineisfirstused. ImportedCNCequipmentmostlyusesmodernmicroelectronicsnumericalcontroltechnologyandismanagedbyPC.ItshouldbesaidthattheCNCmachinemanagesCNC-PLCandOPsystem,whichgreatlyimprovestheoperationperformanceandmain
- classification:Industry news
- 作者:
- 来源:
- Time:2019-07-10
- 访问量:6
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