机械类文献翻译关于数控车床.docx
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机械类文献翻译关于数控车床.docx
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机械类文献翻译关于数控车床
英文原文
OntheNClathe
CNCmachinetoolnumericalcontrolmachinetools(Computernumericalcontrolmachinetools)abbreviation,isprovidedwithaprogramcontrolsystemofautomaticmachinetools.Thelogiccontrolsystemcandealwiththecontrolcodeorothersymbolicinstructionspecifiedprogram,anddecodingthedigitalcode,saidinformationcarrier,throughthenumericalcontroldeviceinput.AfterprocessingbyCNCdevicecontrolsignals,controlthemachinemovements,bydrawingtheshapeandsizerequirements,willbeautomaticallyprocessedbytheparts.
Features:
CNCmachinetooloperationandmonitoringofallcompletedinthenumericalcontrolunit,itisthebrainofCNCmachinetools.Comparedwiththegeneralmachinetools,CNCmachinetoolshasthefollowingcharacteristics:
●theprocessingobjectadaptability,adapttothecharacteristicsofmoldproductssuchasasingleproduction,providetheappropriateprocessingmethodfordieandmouldmanufacturing;
●highmachiningaccuracy,processingwithstablequality;
●cancoordinatelinkage,processingcomplexshapeparts;
●machiningpartschange,onlyneedtochangetheprogram,cansavethepreparationtimeofproduction;
●themachineitselfhighprecision,rigidity,canchoosetheamountofprocessinggood,highproductivity(3~5timesascommonmachine);
Themachineisahighdegreeofautomation,reducinglaborintensity;
●conducivetotheproductionmanagementmodernization.TheuseofCNCmachinetoolsandthestandardcodeofdigitalinformationprocessing,informationtransmission,theuseofcomputercontrolmethod,haslaidthefoundationfortheintegrationofcomputeraideddesign,manufacturingandmanagement;
●ontheoperatorsofhigherquality,higherdemandsfortherepairofthetechnicalstaff;
●highreliability.
Composition:
CNCmachinetoolsingeneralbytheinputmedium,man-machineinteractiveequipment,CNCequipment,feedservodrivesystem,spindleservodrivesystem,theauxiliarycontroldevice,feedbackapparatusandadaptivecontroldeviceetc..[4]inNCmachining,NCmillingprocessingisthemostcomplex,needtosolvemostproblems.NCprogrammingofNClineinadditiontoCNCmilling,cutting,CNCEDM,CNClathe,CNCgrinding,eachwithitsowncharacteristics,servosystemistheroleofthemotionsignalisconvertedintothemachinemovingpartsfromthenumericalcontroldeviceofpulse.Concretehasthefollowingparts:
thestructureofCNCmachinetools.
Driver:
heisdrivingpartsofCNCmachinetools,actuator,includingspindledriveunit,feedingunit,spindlemotorandfeedmotor.Hethroughtheelectricorelectro-hydraulicservosystemtorealizethespindleandfeeddriveunderthecontrolofnumericalcontroldevice.Whenseveralfeedlinkage,cancompletethepositioning,processingline,planecurveandspacecurve.
Themainperformance
(1)themaindimensions.
(2)thespindlesystem.
(3)feedsystem.
(4)toolsystem.
(5)electrical.Includingthemainmotor,servomotorspecificationsandpoweretc..
(6)coolingsystem.Includingthecoolingcapacity,coolingpumpoutput.
(7)dimensions.Expressedaslength*width*height.
DevelopmenttrendofCNClathe:
Highspeed,precision,complex,intelligentandgreenisthegeneraltrendinthedevelopmentofCNCmachinetooltechnology,inrecentyears,madegratifyingachievementsinpracticalityandindustrialization.Mainlyinthe:
1machinetoolcompositetechnologytofurtherexpandwiththeCNCmachinetooltechnology,compositeprocessingtechnologymatures,includingmilling-carcompound,carmillingcompound,car-boring-drill-gearcuttingcompound,compositegrinding,forming,compositeprocessing,precisionandefficiencyofmachiningisgreatlyimproved."Onemachineisaprocessingfactory","onecard,completeprocessing"conceptisbeingacceptedbymorepeople,thedevelopmentofcompoundprocessingmachinetoolisthetrendofdiversified.
Intelligenttechnology2CNCmachinetoolshaveanewbreakthrough,intheperformanceofNCsystemhasbeenreflectedmore.Suchas:
automaticallyadjusttheinterferenceanti-collisionfunction,afterthepowerofworkpieceautomaticallyexitsafetypower-offprotectionfunction,machiningpartsdetectionandautomaticcompensationfunctionoflearning,highprecisionmachiningpartsintelligentparameterselectionfunction,processautomaticeliminationofmachinevibrationfunctionsintothepracticalstage,intelligentupgradethefunctionofmachineandquality.
The3robotsenableflexiblecombinationofflexiblecombinationofhigherefficiencyofrobotandthehostarewidelyused,makeflexiblelinemoreflexible,extendingthefunction,flexiblelineshortenfurther,moreefficient.Robotandmachiningcenter,millingcompositemachine,grinder,gearprocessingmachinetool,toolgrindingmachine,electricmachine,sawingmachine,punchingmachine,lasercuttingmachine,watercuttingmachineetc.variousformsofflexibleunitandflexibleproductionlinehasalreadybeguntheapplication.
4precisionmachiningtechnologyhasthemachiningprecisionofCNCmetalcuttingmachinetoolsfromtheyarnintheoriginal(0.01mm)uptomicronlevel(0.001mm),somevarietieshasreachedabout0.05μM.MicrocuttingandgrindingmachiningofultraprecisionCNCmachinetools,precisioncanreachabout0.05μm,shapeprecisioncanreachabout0.01μM.Specialprocessingprecisionbyusingoptical,electrical,chemical,energycanreachnanometerlevel(0.001μm).Byoptimizingthedesignofmachinetoolstructure,machinetoolpartsofultraprecisionmachiningandprecisionassembly,usinghighprecisionclosedloopcontrolandtemperature,vibrationandotherdynamicerrorcompensationtechnology,improvethegeometricaccuracyofmachinetoolprocessing,reducetheshapeoferror,surfaceroughness,andintothesubmicron,nanosuperfinishingti
The5functionalcomponenttoimprovetheperformanceoffunctionalcomponentsareatahighspeed,highprecision,highpowerandintelligentdirection,andobtainthematureapplication.AfulldigitalACservomotoranddrivedevice,hightechnologycontentoftheelectricspindle,linearmotor,torquemotor,linearmotioncomponentswithhighperformance,applicationofhighprecisionspindleunitandotherfunctionparts,greatlyimprovingthetechnicallevelofCNCmachinetools.
ThefeeddrivesystemofCNClathe:
Effectoffeeddrivesystem,
ThefeeddrivesystemofCNCmachinetoolswillbereceivedpulsecommandissuedbythenumericalcontrolsystem,andtheamplificationandconversionmachinemovementscarrytheexpectedmovement.
Two,thefeedingtransmissionsystemrequirements
InordertoguaranteethemachiningaccuracyofNCmachinetoolishigh,thefeeddrivesystemoftransmissionaccuracy,sensitivityhigh(fastresponse),stablework,highstiffnessandfrictionandinertiasmall,servicelife,andcanremovethetransmissiongap.
Categorythree,feeddrivesystem
1,steppingmotorservosystem
GenerallyusedforNCmachinetools.
2,DCservomotorservosystem
Powerisstable,butbecauseofthebrush,thewearresultinginuseneedtochange.Generallyusedformiddle-gradeCNCmachinetools.
3,ACservomotorservosystem
Theapplicationisextremelywidespread,mainlyusedinhigh-endCNCmachinetools.
4,thelinearmotorservosystem
Nointermediatetransmissionchain,highprecision,thefeedspeed,nolengthlimit;butthepoorheatdissipation,protectionrequirementsareparticularlyhigh,mainlyusedforhigh-speedmachine.
Drivingcomponentfour,feedsystem
1,theballscrewnutpair
NCmachining,therotarymotionintolinearmotion,sotheuseofscrewnuttransmissionmechanism.NCmachinetoolsarecommonlyusedontheballscrew,asshowninFigure1-25,itcanbeaslidingfrictionintorollingfriction,meetthebasicrequirementsofthefeedsystemtoreducefriction.Thetransmissionsideofhighefficiency,smallfriction,andcaneliminatethegap,noreverseairtravel;butthemanufacturingcostishigh,cannotlock,sizeisnottoobig,generallyusedforlinearfeedinsmallCNCmachinetool.
2,rotarytable
InordertoexpandthescopeoftheprocessofNCmachinetools,CNCmachinetoolsinadditiontomakelinearfeedalongtheX,Y,Zthreecoordinateaxes,oftenalsoneedacircumferentialfeedmovementaroundYorZaxis.CircularfeedmotionofCNCmachinetoolsingeneralbytherotarytabletorealize,formachiningcenter,rotarytablehasbecomeanindispensablepartof.
RotarytableofcommonlyusedCNCmachinetoolsintheindexingtableandNCrotarytable.
(1)indexingtable
Indexingtablecanonlyfinishdividingmovement,notcircularfeed,itisinaccordancewiththeinstructionsintheNCsystem,whenindexingwillworktogetherwiththeworkpiecerotationangle.Whenindexingcanalsousemanualindexing.Provisionsofindexingtableisgenerallyonlyrotaryangle(suchas90,60and45degree).
(2)NCrotarytable
NCrotarytableappearancesimilartotheindexingtable,buttheinternalstructureandfunctionisnotthesame.ThemainfunctionoftheNCrotarytableisbasedonthenumericalcontroldevicesendscommandpulsesignal,completecircumferentialfeedmovement,variousarcprocessingandsurfaceprocessing,itcanalsobegraduationwork.
3,guide
Railisanimportantpartoffeeddrivesystem,isoneofthebasicelementsofthestructureofmachinetool,rigidity,precisionandaccuracyofNCmachinetoolwhichdeterminestoalargeextentretention.Atpresent,guidetheNCmachinetoolareslidingrail,rollingguidewayandhydrostaticguideway.
(1)slidingguide
Slidingguiderailhastheadvantagesofsimplestructure,easymanufacture,goodstiffness,vibrationresist
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