外文资料--Developing a Postprocessor for Three Types of Five-Axis Machine Tools.pdf外文资料--Developing a Postprocessor for Three Types of Five-Axis Machine Tools.pdf

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INTJADVMANUFTECHNOL1997136586651997SPRINGERVERLAGLONDONLIMITEDTHEINTERNATIONALJOURNALOFRDVANCEDMANUFACTURINGLECHNOLOGGDEVELOPINGAPOSTPROCESSORFORTHREETYPESOFFIVEAXISMACHINETOOLSRSLEEANDCHSHEDEPARTMENTOFMECHANICALENGINEERING,NATIONALCHENGKUNGUNIVERSITY,TAINAN,TAIWAN,REPUBLICOFCHINATHISPAPERPRESENTSAPOSTPROCESSORCAPABLEOFCONVERTINGCUTTERLOCATIONCLDAMTOMACHINECONTROLDATAFORTHREETYPICALFIVEAXISMACHINETOOLSTOESTABLISHANINTERFACEBETWEENCOMPUTERAIDEDMANUFACTURINGCAMSYSTEMSANDNUMERICALLYCONTROLLEDNCMACHINES,THEANALYTICALEQUATIONSFORNCDATAAREOBTAINEDUSINGTHEHOMOGENEOUSCOORDINATETRANSFORMATIONMATRIXANDINVERSEKINEMATICSINADDITION,THEDEVELOPEDPOSTPROCESSORMETHODISIMPLEMENWDTHROUGHATRIALCUTONAFIVEAXISMACHINEANDVERIFIEDONTHECOORDINATEMEASUREMENTMACHINEEXPERIMENTALRESULTSCONFIRMEDTHEEFFECTIVENESSOFTHEPROPOSEDPOSTPROCESSORMETHODWHICHCANBEUSEDTOINTEGRATETHEVARIOUSFIVEAXISMACHINETOOLSEMPLOYEDINMANUFACTURINGSYSTEMSKEYWORDSCOORDINATETRANSFORMATIONMATRIX;CUTTERLOCATIONDATA;FIVEAXISMACHINES;NCPROGRAMMING;POSTPROCESSOR1INTRODUCTIONFREEFORMSURFACESORSCULPTUREDSURFACESHAVEFOUNDEXTENSIVEINDUSTRIALAPPLICATIONS,SUCHASINAUTOMOBILEBODIES,SHIPHULLSANDAEROSPACEPARTSTHEMOULDORSTAMPINGDIEUSEDTOCREATESUCHAPARTISUSUALLYMACHINEDUSINGNUMERICALLYCONTROLLEDNCMACHINETOOLSTHECONVENTIONALWAYOFMACHININGFREEFORMSURFACESISBYUSINGATHREEAXISMACHINETOOLWITHABALLENDMILLTHREEAXISMACHINETOOLSCANNOTCHANGETHETOOLORIENTATION,SOAFIVEAXISMACHINETOOLISINTRODUCEDTOSETTHECUTTINGTOOLINANAPPROPRIATEORIENTATIONFOREFFICIENTMACHININGWITHTHERAPIDLYADVANCINGCOMPUTERTECHNOLOGY,COMMERCIALCAD/CAMSYSTEMSCANDESIGNFREEFORMSURFACESANDGENERATEEITHERTHETHREEAXISORFIVEAXISTOOLPATHTHECUTTERLOCATIONCLDATA,COMPOSEDOFCUTTERTIPPOSITIONANDTHETOOLORIENTATION,CANTHENBEDIRECTLYOBTAINEDFROMACADMODELOFAPRODUCTDESIGNCREATEDINTHECAD/CAMSYSTEMSHOWEVER,DIFFICULTYFREQUENTLYARISESINCOMMUNICATIONBETWEENTHECAMSYSTEMSANDTHENCMACHINETOOLS,ESPECIALLYWHENCORRESPONDENCEANDOFFPRINTREQUESTSTOPROFESSORRONGSHEANLEE,DEPARTMENTOFMECHANICALENGINEERING,NATIONALCHENGKUNGUNIVERSITY,TAINAN,TAIWAN70101,REPUBLICOFCHINAVARIOUSMACHINETOOLSAREEMPLOYEDTHEINTERFACETHATLINKSTHECAMSYSTEMSANDNCMACHINESISCALLEDTHEPOSTPROCESSORANDITCONVERTSCLDATATOMACHINECODEESSENTIALLY,DIFFERENTCOMBINATIONSOFMACHINETOOLANDCONTROLUNITREQUIREDIFFERENTPOSTPROCESSORSCONSEQUENTLY,AMANUFACTURINGSYSTEMWITHAVARIETYOFMACHINETOOLSREQUIRESSEVERALPOSTPROCESSORSVARIOUSSTUDIESHAVEADDRESSEDTHEISSUEOFDEVELOPINGPOSTPROCESSORSFORMACHINETOOLSBEDIANDVICKERS1DEVELOPEDAPOSTPROCESSORPROGRAMFORFANUC6MBMACHINETOOLBALAJI2PRESENTEDTHEDEVELOPMENTANDIMPLEMENTATIONOFAPOSTPROCESSORBYCONVERTINGAPTSOURCECODESTOAMACHINECODEFORMATLINANDCHU3DERIVEDTHENCDATAFORMACHINETOOLSTOMANUFACTURECAMSWITHFIATFACEFOLLOWERSUSINGAMODIFIEDDENAVITHARTENBERGDHNOTATIONHOWEVER,THEABOVEWORKSAREONLYRELATEDTOTHREEAXISMACHININGINADDITION,SINCETHETOOLAXISORIENTATIONISFIXEDFORATHREEAXISMACHINETOOL,THETRANSFORMATIONFROMCLDATATONCDATAISSTRAIGHTFORWARDANDNOADDITIONALCOORDINATETRANSFORMATIONTECHNIQUEISNECESSAUTOFULFILTHEINDUSTRIALDEMANDFORGEOMETRICVARIETYANDHIGHPRECISION,THEUSEOFMULTIAXISMACHININGHASINCREASED,ESPECIALLYFORMACHININGSCULPTUREDSURFACESSUHANDLEE4DEVELOPEDAFOURAXISCAMSYSTEMINCLUDINGCLDATAGENERATIONANDPOSTPROCESSINGVICKERSETAL5USEDAGSURFMETHODTODEFINEANDMACHINECOMPOUNDCURVATURESURFACESONTHREE,FOURANDFIVEAXISMACHINETOOLTAKEUCHIANDWATANABE6PROPOSEDAFIVEAXISCONTROLCOLLISIONFREETOOLPATHANDPOSTPROCESSORMETHODFORTWOTYPESOFMACHINECONFIGURATIONSAKAMOTOANDINASAKI7CLASSIFIEDTHECONFIGURATIONOFFIVEAXISMACHINETOOLSINTOTHREETYPESHOWEVER,THEANALYTICALNCDATAEXPRESSIONISNOTAVAILABLEINTHEABOVEWORKSLINANDTSAI8RECENTLYUSEDTHEDHNOTATIONTOGENERATEANNCDATAEQUATIONFORMACHININGASPATIALCAMONAFOURAXISMACHINETOOLFURTHERMORE,WARKENTINETAL9PRESENTEDATECHNIQUEFORMACHININGSPHERICALSURFACESINTHEIRWORK,THEDESIREDNCDATAISDERIVEDFORONLYONECONFIGURATIONOFFIVEAXISMACHINEMEANWHILE,RAOETAL10DEVELOPEDTHEPRINCIPALAXISMETHODTOMACHINECOMPLEXSURFACESONTWOCONFIGURATIONSOFFIVEAXISMACHINESNEVERTHELESS,ONLYROTATIONALMOVEMENTSWEREDETERMINEDTRANSLATIONALMOVEMENTSFORTHEMACHINETOOLWERENOTINVESTIGATEDSINCETHEREMAYBEACONSIDERABLENUMBEROFCOMBINATIONSOFFIVEAXISDEVELOPINGAPOSTPROCESSORFIRFIVEAXISMACHINETOOLS659MACHINETOOLCONFIGURATION,THEPOSTPROCESSORWILLINEVITABLYBEDEVELOPEDINDIVIDUALLY6HOWEVER,ACCORDINGTOTHECLASSIFICATIONPROPOSEDBYSAKAMOTOANDINASAKI7,THESTRUCTUREOFTHEFIVEAXISMACHINETOOLCANBEDIVIDEDINTOTHREEBASICTYPESNONEOFTHEABOVESTUDIESHASDERIVEDTHECOMPLETEANALYTICALEQUATIONSFORNCDATAWHICHCONTAINTHREELINEARMOTIONSANDTWOROTARYMOTIONSTHISWORKAIMSTODEVELOPAPOSTPROCESSORFORTHREEKINDSOFFIVEAXISMACHINETOOLS,BASEDONTHEHOMOGENEOUSCOORDINATETRANSFORMATIONMATRIXTHEANALYTICALEQUATIONSFORNCDATACANBEOBTAINEDBYEQUATINGTHEFORMSHAPINGFUNCTIONMATRIXANDTHEKNOWNCLDATAANDSOLVINGTHESIMULTANEOUSALGEBRAICEQUATIONSMOREOVER,THEMACHINETOOLSETTINGPROCEDUREANDTHECHARACTERISTICSFORDIFFERENTCONFIGURATIONSAREDISCUSSEDTOVERIFYTHEVALIDITYANDEFFECTIVENESSOFTHEDEVELOPEDPOSTPROCESSOR,ADESIGNEDBEZIERSURFACEISMACHINEDWITHMODELMATERIALONATYPICALFIVEAXISMACHININGCENTREANDTHENMEASUREDONTHECOOR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
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