整体叶轮五轴数控粗加工编程技术研究

南京航空航天大学硕士学位论文整体叶轮五轴数控粗加工编程技术研究姓名：戚家亮申请学位级别：硕士专业：航空宇航制造工程指导教师：安鲁陵2011-03I+UG/OpenAPIVisualC++6.0IIAbstractIntegralimpellerisacorecomponentofanaero-engine.Itiscomplexinshapesandstructures,andisdifficulttomachine.Five-axisNCmachiningisprecise,efficientandflexible,whichbecomesacommonmethodofmanufacturingimpeller.Thisthesisstudies5-axisNCroughmachiningtechnologyoftheintegralimpeller.Themaincontentandresultsofthispaperareasfollows:Roughmachiningprocessofintegralimpellerisdesigned.Accordingtothestructuralcharacteristicsofimpeller,thecalculationmethodsforthebendingandtorsionofimpellerblade,themaximumbladeheightandtheminimumimpellertunnelwidtharestudied,andtoolaccessibilityoftunnelandmachinabilityareanalyzed.Byanalyzingprocessfeaturesofdifferentmachiningmethods,suchasplungemillingandflankmilling,amethodforimpellerroughmachiningisproposed,whichiscalled“plungemillingtunnel+flankmillingblade”,andthewayofdeterminationfortoolandprocessingparametersaregiven.Thetool-pathgenerationalgorithmoftunnelplungemillingforimpellerisstudied.Anewalgorithmforunilateralenvelopelineoffreecurveisproposed,andthedistancefrompointsonthefreecurvetotheenvelopelinecanbemoreevenlydistributedbyusingthisalgorithm.Basedonthenewalgorithm,plungemillingregionwithoutover-cuttingoftunnelisdetermined.Thecalculationmethodsoftool-pathstep,millingspacingandcutterlocationoftheplungemillingaregiven,andthetool-pathisplannedaccordingtothe“zig-zag”cuttingstrategy.Thetool-pathgenerationalgorithmofthebladeflankmillingisresearched.Thewayofhowtodeterminetoolaxisdrivingsurfaceofbladeflankmillingisgiven.Thecalculationmethodsoftool-pathstepandcutterlocationofflankmillingaregivenbyanalyzingthemachiningerror.Usingthetool-pathplanningalgorithmforroughmachiningofimpellerpresentedinthispaper,afunctionalmoduleisdevelopedinVisualC++6.0programmingenvironmentbasedonUG/OpenAPIinterfacefunctions.Takenanimpellerofanaero-engineasanexample,NCroughmachiningtool-pathisgeneratedwithapplicationofthefunctionalmodule,andtheresultswhichareverifiedbythemachiningsimulationindicatethatthedesignedalgorithmoftool-pathplanningiseffective.Keywords:Integralimpeller,Roughmachining,Plungemilling,Flankmilling,Tool-path,UnilateralenvelopelineV1.1..............................................................................................................................32.1..............................................................................................................................82.2.................................................................................................................102.3.................................................................................................................102.4.....................................................................................................112.5....................................................................................................................................122.6.....................................................................................................132.7.................................................................................................................142.8............................................................................................................................152.9.........................................................................................................................162.10...................................................................................................................172.11...........................................................................................................182.12...................................................................................................................183.1.....................................................................................................213.2.....................................................................................................233.3................................................................................................................................233.4.....................................................................................................................243.5.........................................................................................................................263.6.................................................................................................263.7.........................................................................................................263.8.........................................................................................................273.9.............................................................................................283.10...................................................................................................293.11.......................................................................................................303.12........