工藝規(guī)劃與CADCAM數(shù)控機(jī)床系統(tǒng)集成

歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助!歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助!歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助!歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助!歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助!歡迎閱讀本文檔，希望本文檔能對(duì)您有所幫助!AfeasibleapproachtotheintegrationofCADandCAPP

綜合方法與總體思路AlthoughcurrentCADsystemsaredeclaredtobefeature-based,infact,theso-calledfeatureisjustamodelingmacroormenunamesuchasProtrusion,Revolution,Cutout,Block,etc.,insteadofadesignfeatureormanufacturingfeatureinaccordancewithengineeringpractice.Consequently,productmodeldatainsufficiencyandincompatibilitybetweenvarietiesofapplicationsystemsarestillthemajorbarrierstosystemintegration,especiallytheintegrationofdesignandprocessplanning.Thispaperproposesapracticalsolutionforabi-directionalintegrationofCADandCAPPontheplatformofcommercialCADsystems.Thekeytechniquessuchasfeaturerecognitionandconversion,featureparameterandconstraintextraction,featuretreereconstruction,technicalinformationprocessing,processplanning,automaticprocessdrawingmarkingand3DmaterialstockCADmodelgeneratingarediscussed.Andtheextractedfeaturesandtheirrelatedtechnicalinformationandknowledgeareencapsulatedtogetherwiththegeometry-orientedCADmodeltoformanintegratedproductinformationmodeltofacilitateeffectiveintegrationwiththedownstreamactivities.TheintegratedCAD/CAPPsystemisimplementedonacommercialCADpackage,UGS/SolidEdge.Acasestudyandindustryimplementationillustratethefeasibilityoftheapproachproposed.ArticleOutline1.Introduction2.Relatedresearchworkandreview2.1.Featurerecognitionandtechnicalinformationprocessing2.2.Processplanning2.3.Systemintegration3.Theproposedmethodology3.1.Systemarchitecture3.2.Informationintegration3.3.Functionmodel4.Featurerecognitionandconversion4.1.Featurerecognitionandconversionalgorithm4.2.Manufacturingfeaturerecognitionandreconstruction5.Processplanning5.1.Processdecision-making5.2.Processselectionandoperationsequencingoptimization6.Stockmodelandprocessdrawinggeneration6.1.Stockmodelgenerating6.2.Processdrawinggenerating6.3.Otheraidedfunctions7.ConclusionsReferencesAframeworkforextendingcomputeraidedprocessplanningtoincludebusinessactivitiesandcomputeraideddesignandmanufacturing(CAD/CAM)dataretrieval

工藝過程規(guī)劃與CAD/CAM制造單元的數(shù)據(jù)提取與互換框架（包含商業(yè)運(yùn)作過程中的產(chǎn)品修改過程）Computeraidedprocessplanning(CAPP)systemshavehadlimitedsuccessinintegratingbusinessfunctionsandproductmanufacturingduetotheinaccessibilityandincompatibilityofinformationresidinginproprietarysoftware.Whilelargecompanieshavedevelopedorpurchasedcomplexordermanagementandengineeringapplications,smallermanufacturerscontinuetousesemi-automatedandmanualmethodsformanaginginformationthroughoutthelifecycleofeachnewproductandcomponent.Thereisaneedforreconfigurableandreprogrammablesystemsthatcombineadvancesincomputeraideddesign(CAD/ComputerAidedManufacturing(CAM)technologyandintelligentmachiningwithproductdatamanagementfordocumentationandcostcontrol.Thegoalofthisresearchistodemonstrateanarchitectureinwhichcustomerservice,CAPPandacostingmethodologyknownasactivitybasedcosting(ABC)areincorporatedintoasinglesystem,therebyallowingcompaniestomonitorandstudyhowexpendituresareincurredandwhichresourcesarebeingusedbyeachjob.ThematerialpresentedinthispaperistheresultofatwoyearuniversityandindustrysponsoredresearchprojectinwhichprofessorsandstudentsattheCostaRicaInstituteofTechnologydevelopedasoftwareapplicationforFEMAIndustrialS.A.,alocalmachiningandfabricationshopwithsixtyfiveemployeesandbothconventionalandCNCcapabilities.Thefinalresultsrepresentnotonlyasignificantcontributiontolocalindustryandtothestudents’educationbut,alsotothecontinuinggrowthofCAPP.Implementingbetterdecisionmakingtoolsandstandardizingtransactionsindigitalformatwouldreducetheworkloadoncriticalpersonnelandarchivevaluableknowledgeforanalyzingcompanymethodsandexpertise.ArticleOutline1.Introduction2.Backgroundinformation2.1.Reviewofexistingworkincomputeraidedprocessplanning(CAPP)2.2.Activitybasedcosting(ABC)methodology2.3.Applicationprogramminginterface(API)3.Industryevaluationandcompanyselection3.1.Industrystudydetails3.2.Companyselection4.Systemdesignandfunctionality4.1.Graphicaluserinterface(GUI)4.2.Descriptionofmodules5.Casestudy6.Resultsofimplementationphase7.ConclusionsAcknowledgementsReferencesApplicationofgeneticalgorithmtocomputer-aidedprocessplanninginpreliminaryanddetailedplanning

工藝過程規(guī)劃與工藝細(xì)節(jié)設(shè)計(jì)的神經(jīng)網(wǎng)絡(luò)算法Computer-aidedprocessplanning(CAPP)isanimportantinterfacebetweencomputer-aideddesign(CAD)andcomputer-aidedmanufacturing(CAM)inthecomputerintegratedmanufacturing(CIM)environment.Agoodprocessplanofapartisbuiltupbasedontwoelements:(1)optimizedsequenceoftheoperationsofthepart;and(2)optimizedselectionofthemachine,cuttingtoolandtoolaccessdirection(TAD)foreachoperation.Ontheotherhand,twolevelsofplanningintheprocessplanningissuggested:(1)preliminaryand(2)secondaryanddetailedplanning.Inthispaperforthepreliminarystage,thefeasiblesequencesofoperationsaregeneratedbasedontheanalysisofconstraintsandusingageneticalgorithm(GA).Theninthedetailedplanningstage,usingageneticalgorithmagainwhichprunestheinitialfeasiblesequences,theoptimizedoperationssequenceandtheoptimizedselectionofthemachine,cuttingtool,andTADforeachoperationareobtained.ByapplyingtheproposedGAintwolevelsofplanning,theCAPPsystemcangenerateoptimalornear-optimalprocessplansbasedonaselectedcriterion.Anumberofcasestudiesarecarriedouttodemonstratethefeasibilityandrobustnessoftheproposedalgorithm.Thisalgorithmperformswellonallthetestproblems,exceedingormatchingthesolutionqualityoftheresultsreportedintheliteratureformostproblems.Themaincontributionofthisworkistoemergethepreliminaryanddetailedplanning,implementationofcompulsiveandadditiveconstraints,optimizationsequenceoftheoperationsofthepart,andoptimizationselectionofmachine,cuttingtoolandTADforeachoperationusingtheproposedGA,simultaneously.ArticleOutline1.Introduction2.Relatedresearchwork3.Materialsandmethods3.1.Preliminaryplanning3.1.1.Analyzingconstraints3.1.2.Geneticalgorithm.Selection.Crossover.Mutation3.2.Secondaryanddetailedplanning3.2.1.Codingstrategy3.2.2.Populationinitialization3.2.3.Fitnessfunction3.2.4.Selectionoperator3.2.5.HYPERLINK"/science?_ob=ArticleURL&_udi=B6V2M-4WBB6WX-1&_user=10&_coverDate=12%2F31%2F2009&_alid=14