附录四 英文文献.docx
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附录四 英文文献.docx
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附录四英文文献
AhistoryofthedevelopmentoftheCNCsystem,China
1Chinasince1958,consistsofanumberofresearchinstitutes,collegesanduniversitiesandafewCNCmachinetoolfactorystartedtheresearchanddevelopment.Duetothelowlevelofdomesticelectroniccomponentswasrestrictedeconomicetc,department,failedtoqualifyforthebiggerdevelopment.
2afterthereformandopeningpolicy,ourcountryinthenumericalcontroltechnologyhasbeengraduallymadesubstantialdevelopment.After"period"(81-85years),theintroductionofforeigntechnology"(86-90years)andthedigestionandabsorptionoffive-year"(91-a-95)nationalorganizationsofscientificresearch,andmakesournumericalcontroltechnologyhasgreatlyimprovedthroughthenationalkey,andidentificationofproductsincludingacceptanceofEverestcompanyinBeijing,huazhongnccompanytypeofhuazhongnctypeandshenyangupscaleblueskyofnationalengineeringresearchcenter,andothertypestatequalitysupervisionby"machine"testtestcenterofqualifieddomesticallyproducednumericalcontrolsystemsuchasnanjingquartoproducts.
3ourCNCmachinemanufacturingindustryinthe1980shadhigh-speeddevelopmentstage,manyfromtraditionalproductrealizationtomachinetoolplantnumericalcontrol.Butgenerallyspeaking,technicallevelisnothigh,poorquality,sointheearly1990sfacedbythestateeconomicplanningeconomytomarketeconomy,afteryearsoftransferofdepression,themostdifficultproductioncapacityto50%,theninventoryexceeds4months.Fromthe19September5yearsafterthenationaltheninthfive-yearplanfromtheexpansionofdomesticmarket,strengtheningstartmachineimportedCNCequipmentlimitedapproval,thekeysupportkeyCNCsystem,equipment,andkeytechnologyofCNCequipmentproduction,playedalargeroleinpromoting,especiallyinthe19September9yearslater,nationaldefenseindustryandthekeytocivilindustrialdepartmentoftechnology,ncequipmentmanufacturingcapitalmarketprosperity.
Third,CNClathecuttingtoolsandtheprocess
Reading:
133
CNClathemachiningprocessandordinarylathemachiningprocessofthesimilar,butduetothenclatheisacontinuousautomaticprocessingclamping,finishmachiningprocess,thusallshouldpayattentiontothefollowingrespects.
1properchoicecuttingdosages
Forhighefficiencyofmetalmachining,processedmaterials,cuttingtools,cuttingconditionsarethethreeelements.Thesedeterminestheprocessingtime,thetoollifeandprocessingquality.Economicandeffectiveprocessingmethodisrationalchoicecuttingconditions.
Cuttingconditionsofthreeelements:
thecuttingspeed,feedandcuttingdepthdirectlycausedamagetothetool.Withthespeedofcuttingpointtemperaturerises,andcanproducethemechanical,chemical,thermalwear.Cuttingspeedincreasedby20%,thetoollifecanreduce11/2.
Feedconditionsandtoolwearrelationsintinybehindtherange.Butthefeeding,cuttingtemperaturerises,wear.Itistheinfluenceofknivescuttingspeed.Theinfluenceofcuttercutdeep,thoughnocuttingspeedandfeed,butinsmallcutdeepcutbycuttingmaterials,hardeninglayer,alsoaffectsthetoollife.
Accordingtotheusersofthematerials,hardness,cutting,material,feeding,cuttingdepthofthecuttingspeedselectionuse.
Themostsuitableprocessingconditionsinthesefactorsareselectedbasedonselected.Therearerules,stablewearlifeidealconditionto.
However,intheactualoperation,thetoollifechoicesandtoolwearandprocessingdimensionalchange,surfacequalityandcuttingnoise,etc.HeatprocessingIndeterminingtheprocessingcondition,accordingtotheactualsituationoftheneedforresearch.Forstainlesssteelandheat-resistantalloydifficult-to-machinematerials,canusethecoolantorchooserigidgoodblade.
2)selectingcutters
1)thick,shouldchoosehighstrength,gooddurability,roughcuttingbackonoptimizingandfeedrequirements.
2)refined,shouldchoosehighaccuracy,gooddurabilitytool,inordertoensuretheaccuracyoftheprocessing.
3)inordertoreducethetimeandconvenienttochangeknifeknife,shouldtrytousemachinesclipclipbladeknifeandmachine.
3rationalchoicefixture
1)trytochoosegeneralfixtureclampingwork-piece,avoidusingspecialjig,
2)partsofthelocatingdatum,toreducetheerror.
4.Determineprocessingroute
Processingrouteiscontrolledmachiningprocess,toolsandrelativepartstrajectorydirection.
1)shouldbeabletoguaranteemachiningprecisionandsurfaceroughnessrequirements,
2)shouldtrytoshortenprocessingroute,reduceairtraveltimetool.
5processingrouteandlimits.butcontact
Atpresent,inCNClatheisnottopopularizetheuseofgeneralconditions,theblankoftheexcessivebesurplus,especiallycontainsforging,castinghardcorticalsurplusarrangementinordinarylathemachining.Ifmustusenclathemachining,shouldpayattentiontotheflexibleprogram.
6fixturessetuppoints
Currentlyhydraulicchuckandhydraulicclampingcylinderconnectionsarerealizedbybars,asshowninfigure1.Hydraulicclampingchuckareasfollows:
firstuseunimportantpointmovehandoffonthehydrauliccylinder,nuts,andfromthespindleu-shapedbackendout,andthenmovehandcanbeunloadedchuckscrew,unloadchuck.
Four,reasonableeffectivemachining
Reading:
102
Effectivelysavetheprocessingtime
ThecompanyG200machiningcenterIndexintegratedprocessingunitfeaturingmodularization,high-powerdoublespindle,withfourfunctions,therebyfurthershortenprocessingtime.Byworkingwiththeotheraxisofclampingconcept,onthecontrary,theproductsusingintegratedintelligentprocessingunitcanmakeautomaticclampingworkpiecepositionandprocessing.Inotherwords,automaticclamping,willnotaffecttheotheraspindle,thecharacteristicsofprocessingcanshortenthetimeabout10%oftheprocessing.
Inaddition,thefourshaftsprocessingveryquickly,canhavetwotoolsforprocessing.Whenthemachineisputintouseinpairs,efficiencyismoreapparent.Namely,theconventionalturningandhardcarcansettwoparallelmachinetool.
Conventionalturningandhardcarisjustthedifferencesbetweenframeandconstantcoolantsystemon.Butwiththeconventionalprocessisdifferent:
theconventionalprocessingusedtwosizesareatail,Andwhenthecarcanusearigidframe.Intwotypesofmachinecanbecarriedoutonthedry,hardmachiningprocessschemewasdesignedtobalancethemakerofthetime,andbeatthemoduleprovidesIndexmachinestructuremakesithasmoreflexibility.
Toimproveproductivityhigh
Withtheimprovementofproductionefficiencyandprecisionoftheusersarealsoputforwardsomehighrequirements.UsingG200turningprocessingcenter,coldstartuptofourworkpiecemachining,canachievethetoleranceof±6mm.Themachiningprocess,usuallykeep2mminaccuracy.SothecompanytoprovidecustomersIndexishighprecision,highefficiency,andprovidethecompletesolutionschemeofhighprecision,needcarefulselection,bearingspindlecomponentfunction.
G200turningcentersinGermanyLandshutBMWautomobilecompanyintheapplicationofachievedgoodeffect.Thefactorynotonlyproduceengine,butalsobylightmetalscastingproductionofplasticparts,interiordecorationandsteeringshaft.Qualitysupervision,themachiningaccuracyisveryprecise:
continuoustoleranceof±15mm,bearingwithtoleranceof±6.5mm.
Inaddition,theprocessingofuniversaluseautomaticintelligentprocessingunitIndexcompany.Thefirsttwoturningcentertoplaybeforetheworkpiece,processingline,thenafterrollingsentbybeltconveyor,cleaningandquenchingprocess.Afinal,thesecondIndexsystem.BytwoG200turningcentersonthebearingonhard.Themachineonlinemeasurement,andthenfinishtounloadingunit.Integratedprocessingunitcompletelytothelayoutoftheworkshop,accordwithhumanengineeringrequirements,coversanareaofdecreasegreatly,andonlytwoemployeescustodymanufacturingunit.
Five,thenumericalcontrolturningprocessingG00comesinandensureprecisiontechniques
Thenumericalcontrolturningprocessingtechnologyhasbeenwidelyusedinmechanicalmanufacturingindustry,howtoefficientandreasonable,andshallconstituteabindingfinishmachiningofeachintheindustry,theengineeringandtechnicalpersonnelmoreorlessallhavetheirownexperience.Theauthorinteachingandtrainingprocesscontrolforyears,andaccumulatedexperienceandskillsinguangzhou,CNCequipmentproductionGSK980Tseriesmachineastheexample,thispaperintroducesafewcasesofthenumericalcontrolturningprocessingtechniques.
AprogramG00comesfirstsentence
Currentlywehaveaccesstothetextbooksandnumericalcontrolturningtechnologybooks,proceduresforthefirstsentenceisestablished,whichcoordinateG50XalphabetaprogramfirstsentenceZ.Basedonthedirective,maysetacoordinatethatatsomepointinthetoolforthecoordinatessystem(X)(alphabetaZaxisworkpiecesurfaceontherightareset.Usingthismethodtowriteprograms,youmustbemovedtotheswordG50setposition,cansetthepositionofalignment.
Forthesword,clampingworkpieceblank;good
2spindleisflatworkpieces,handwheelbenchmarkknifeArightface,
3theZaxisdoesn'tmovealongtheXaxisandreleasetoC,tools,computermemoryG50inputZ0accepts,
4processinputmode,inputG01W-8F50,turningoutastep;theworkpiece,
5Xaxis,releasetheZaxistoCtools,turningoutofparkingmeasuringdiameterworkpiecesteps,G50Xinputgammagamma,computermemorypoint,
6programentrymodes,input
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