船用螺旋桨叶片四坐标数控砂带磨削自动编程技术的研究

OStudyontheAutomaticProgrammingTechnologyofFour-axisNCBeltGrindingforMarinePropellerBladeAThesisSubmittedtoChongqingUniversityinPartialFulfillmentoftheRequirementfortheDegreeofMasterEngineeringByWuJian-QiangSupervisedbyProf.HuangYunMajor:MechanicalManufacturingandAutomationCollegeofmechanicalandEngineeringofChongqingUniversity,Chongqing,ChinaApril2011ACISIGESACISSATIGESSAT,XZACACISIABSTRACTMarinepropellerisanimportantfactortodeterminetheperformanceofaship,itsmanufacturingaccuracyaffectthequalityofthepropulsionsystemdirectly.Marinepropellerbladeiscompositionofcomplexrationalspacesurface,mostofitsprocessingmethodisthatmillingiscarriedoutfirst,andthenusesalargenumberofartificialgrindingtocomplete.Theseresultintheprocessingtaketoomuchtimeandeffect,anditsprocessingprecisionisdifficulttoguarantee.MeanwhileTheworkingconditionsofworkersisalsoextremelypoor.Accordingtotheactualityandtheproblemofprocessingformarinepropellerblade,Inthispaper,basedonthebackgroundoftheengineeringapplicationofNCbeltgrindingmachineintheprocessingofmarinepropellerblade,UsingACISgeometryengine,theautomaticprogrammingtechnologyofmarinepropellerbladeforfour-axisbeltgrindingmachineisstudieddeeplyinthispaper,Itsmaincontentsofthepaperareasfollows:Firstly,analyzeddeeplythestandardfileformatsIGESandACISSATformat,establishedtheconversioninterfaceofSATandIGESfile,basedontheabove,importedtheblademodelintoACISandextractedthesurfacethatwillbeprocessedfromtheblademodelthenGeneratedoffsetsurface.thecuttinglinetrajectoryofbeltgrindingisgeneratedontheoffsetsurfaceuseparameterlinemethodaccordingtothesurfacepropertiesofmarinepropellerblades,studiedthescatteralgorithmofcuttinglinetrajectoryandnodeacquiredalgorithm,computedthetrackingpointonthecuttinglinetrajectoryusingParametricdifferentialalgorithm,Reducedthepointsinformationwhileensuredtheaccuracyofinformation,acceleratedgreatlythecalculationspeed.studiedthecontrolalgorithmofcutteraxisvectoraccordingtothemovementcharacteristicsoffour-axisbeltgrindingformarinepropellerblade,analyzedthemismachiningtolerancegeneratedinthebeltgrindingprocess,discusseddeeplyitscauseandErrorCompensation,researchedcuttingwidth,cuttingsteplengthandthechoiceoftoolradius,andgeneratedcutterlocationfile.Atthesametime,studiedthepost-processingtechniquesoffour-axisNCbeltgrindingmachine,establisheditsstructuremodelandarelativecoordinatesystemrelativetotheworkpieceandthetoolcoordinatebywayofanalyzingitskinematiclink,establishedthemotiontransformationequationoffour-axisNCbeltgrindingmachineaccordingtothekinematiclink,obtainedthecoordinatesofmotionforfour-axisNCbeltgrindingIImachine.ThenstudiedTheaxisfeedspeedcontrolmode.Onthebasisoftheaboveresearchresults,designedthegrossstructureofautomaticprogrammingsystemforfour-axisbeltgrindingofmarinepropellerblade,developedthesystembyObject-orientedmethod.Keywords:MarinePropeller,AutomaticProgramming,BeltGrinding,ACISIII..........................................................................................................................................I........................................................................................................................................II1.........................................................................................................................................11.1...............................................................................................................................11.2...........................................................................................................21.3...........................................................................31.3.1................................................................31.3.2................................................................41.4...................................................................................................................51.4.1................................................................................................................51.4.2........................................................................................................61.5....................................................61.6...................................................................................................71.6.1................................................................................................................71.6.2........................................................................................................72..............................................................................................82.1...........................................................................................................................................82.2ACIS.................................................................................................................................82.2.1ACIS...........................................................................................................82.2.2ACIS..........