《数字化协同制造综合实训》课件-任务2-立铣刀加工平面（英文）

AseriesoftextbooksformechanicalinnovationplanninginhighervocationaleducationTask2EndmillsmachineflatsurfacesTaskcontentInactualproduction,CNCmachininginadditiontothefacemillcuttercanprocesstheplane,accordingtothelimitationoftheprocessingconditionswillalsochoosetheendmilltoprocesstheplane.TaskcontentExplainhowtousetheendmillontheVDL-600ACNCmachineforplaneprocessing,thatis,complete65mm×65mm×30mmplaneprocessingon65mm×65mm×35mmaluminum,andthealuminummaterialisshowninthefigure.02MasterthestructureanduseofendmillsMissionObjectives01ProficientinthemeaningofCNCprogrammingcode,andcanbeflexiblyappliedtotheexampleprocessing03ProficientintheelementsofendmillinstallationandmachiningMissionpreparationPreparationofmaterials165mm×65mm×35mmaluminum.Equipmentpreparation2FANUCVDL-600AVerticalCNCMillingMachine.Toolpreparation3φ12mmendmill,hydraulicvise.Gagepreparation4Verniercalipers,knifeedgeanglerulers.Auxiliarytools5Chamfers,horns,visewrenches,copperrods.KnowledgeLinks1.TheconceptofsubroutinesInseveralpositionsofamachiningprogram,ifthereisaseriesofcontentsthatareidenticalorsimilarinwriting,inordertosimplifytheprogram,theseduplicateprogramsegmentscanbeextractedseparatelyandwrittenintosubroutinesinacertainformat,andthenstoredintheprogramstoragelikethemainprogram.Ifthemainprogramneedstoexecuteasubroutineduringexecution,thesubprogramcanbeinvokedbyasubroutineinvocationinstructionofacertainformat,andthesubprogramreturnstothemainprogramaftertheexecutioniscompleted,andcontinuestoexecutethefollowingprogramsegments.KnowledgeLinks1.Theconceptofsubroutines1)NestingofprogramsTofurthersimplifytheprogram,youcanhaveasubroutinecallanothersubroutine,whichiscallednestingofsubroutines.IfthenestingdepthofasubroutineisLevel2,itsprogramexecutionisshowninthefigure.KnowledgeLinks1.Theconceptofsubroutines2)InvocationandexecutionofsubroutinesThewritingofthesubroutineisbasicallythesameasthatofthemainprogram,exceptthattheprogramdoesnotneedtoestablishtheworkpiececoordinatesystematthebeginning,andtheprogramendcharacterisM99,whichindicatesthatthesubprogramends,andreturnstothemainprogramthatcalledthesubprogram.KnowledgeLinks1.Theconceptofsubroutines2)InvocationandexecutionofsubroutinesThe4digitsafterthecalladdressParethesubroutinenumber,andthenumberofcallsafterthecalladdressListhenumberofcalls,andwhenthenumberofcallsis1,itcanbeomitted,andthenumberofrepeatedcallsallowedis999times.MostCNCsystemsareavailableinthefollowingformats:TheformatinwhichthesubroutineiscalledM98P_L_；ThemainprogramcallsthesubroutineM99；ThesubroutineendsandreturnstothemainprogramKnowledgeLinks2.EndmillsmainForprocessingEndmillsarethemostusedtypeofmillingcutterinCNCmachininggroove01Smallerofthestepface02Planarprofile03KnowledgeLinks2.EndmillsEndmillsTheendmillhascuttingedgesonboththecylindricalsurfaceandtheendface;Theycanbecutatthesametimeorseparately.KnowledgeLinks2.EndmillsThecuttingedgeonthecylindricalsurfaceisthemaincuttingedge,andthecuttingedgeontheendfaceisthesecondarycuttingedge.Themaincuttingedgeisgenerallyaspiralgroove,whichcanincreasethesmoothnessofcuttingandimprovethemachiningaccuracy.Thesecondarycuttingedgeismainlyusedtoprocessthebottomplaneperpendiculartotheside,andthereisnocuttingedgeatthecenteroftheendfaceoftheordinaryendmill,sothegeneralendmillshouldnotbeaxialfeed.KnowledgeLinks2.EndmillsEndmillswithacenteredgearealreadyonthemarketandcanbefeddirectlyaxially.Over-centerfour-fluteendmillKnowledgeLinks2.EndmillsInordertobeabletomachinedeepgroovesandensuresufficientgrindcapacity,theaxiallengthoftheendmillisgenerallylonger.Inordertoimprovechipcurling,increasechipholdingspace,andpreventchipblockage,theendmillhasarelativelysmallnumberofcutterteethandalargerarcradiusofthechipgroove.Generally,thenumberofteethofcoarsetoothendmillZ=3~4,thenumberofteethoffinetoothendmillZ=5~8,andthesleevestructureZ=10~20.Thearcradiusofthefluteis2~5mm.KnowledgeLinks2.EndmillsEndmillswithdiametersgreaterthan40~160mmcanbemadeintoacompleteset.BecauseCNCmillingmachinesrequiremillingcutterstobeabletoloadandunloadquicklyandautomatically.Thestructureoftheendmillshankisverydifferent,anditisgenerallymanufacturedintoaunifiedformanduniformsizeoftheshankbyprofessionalmanufacturersaccordingtocertainspecifications.KnowledgeLinks2.EndmillsTherelevantdimensionalparametersoftheendmillareshowninFigKnowledgeLinks2.EndmillsItisrecommendedtousethefollowingempiricaldata(1)ThetoolradiusRshouldbelessthantheminimumcurvatureradiusRcurvatureoftheinnercontoursurfaceofthepart,generallytakeR=(0.8~0.9)Rcurvature;(2)ThemachiningheightofthepartsH≤(1/6~1/4)Rtoensurethatthetoolhassufficientrigidity;(3)Fordeepgrooves,selectl=H+(5~10)mm(listhelengthofthecuttingpartofthetool);(4)Whenmachiningtherib,thediameterofthetoolD=(5~10)b(bisthethicknessoftherib).Tasksteps1.ReadthedrawingPreliminaryexaminationDimensionsandrequirementsofthedrawingTasksteps2.DevelopprocessingtechnologyEstablishaworkpiececoordinatesystembasedondrawingsandsimplifiedprogrammingTasksteps2.DevelopprocessingtechnologyToolselection,thistaskusesaφ12mmfacemilltomachineaflatsurfaceCutternumberThenameofthecutterSpindlespeed(r/min)Feedspeed(mm/min)T2φ12mmendmillS800Z：F100；X、Y：F200Tasksteps2.DevelopprocessingtechnologyAccordingtothediameteroftheendmillandthesizeofthepattern,thepathisdeveloped.Tasksteps2.DevelopprocessingtechnologyserialnumberXYremark1-40-30

240-30

340-20

4-40-20

5-40-10

BasispointcalculationTasksteps2.DevelopprocessingtechnologyDeterminetheoriginoftheworkpiececoordinatesystemandtheroutingroute,i.e.,1→2→3→4→5Tasksteps2.DevelopprocessingtechnologyMachiningprogramexegesisO1112；ThenameofthemainprogramG90G17G21G40G49G80；initializeG28G91Z0；TheZ-axisisbacktothereferencepointG54G90G00X0Y0；ThetoolmovesquicklytotheworkpiececenterpointM03S1000；Thespindlerotatesforwardataspeedof1000r/minG00X-40Y-30；Thetoolmovesquicklytoa1downpointZ100；ThetoolmovesquicklytoasafesurfaceZ5；ThetoolmovesquicklytotheZ5planeG01Z0F100；StraightlineinterpolationtopointZ-3M98P12L4；Callthesubroutine4timesG90G00Z100；ThetoolmovesquicklytotheheightoftheabsolutecoordinateZ100M05；ThespindlestopsM30；EndofprogramO12；ThenameofthesubroutineG91G01Z-1F100；TheZaxismoves1mminanegativedirectionX80F200；Thetoolmoves80mminthepositivedirectionalongtheXaxisY10；Thetoolismoved10mminthepositivedirectionalongtheYaxisX-80F200；Thetoolmoves80mminthenegativedirectionalongtheX-axisY10；Thetoolismoved10mminthepositivedirectionalongtheYaxisM99；ThesubroutineendsThereferenceprogramforwritingCNCmachiningprogramsisshowninthe