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阶梯钻钻削CFRP锥形沉头孔实验研究.docx

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阶梯钻钻削CFRP锥形沉头孔实验研究 Title:ExperimentalStudyonStepDrillingCFRPTaperedCountersunkHoles Abstract: CarbonFiberReinforcedPolymer(CFRP)materialsarewidelyusedinvariousindustriesduetotheirhighstrength-to-weightratio.However,machiningCFRPmaterials,particularlydrillingholes,canbechallengingduetotheiranisotropicnatureandsensitivitytodelamination.ThisstudyaimstoinvestigatethedrillingprocessofCFRPmaterialsusingastepdrillingtechniquetocreatetapercountersunkholes.Theexperimentalparameters,includingdrillingspeed,feedrate,stepdrillingdepth,andtoolgeometry,aresystematicallyvariedtoanalyzetheireffectsonholequality,toolwear,cuttingforces,anddelamination. Keywords:CFRP,stepdrilling,tapercountersunkholes,holequality,toolwear,cuttingforces,delamination. 1.Introduction CarbonFiberReinforcedPolymer(CFRP)materialshavegainedincreasingpopularityinaerospace,automotive,andotherindustriesduetotheirexceptionalproperties,suchashighstrength-to-weightratio,corrosionresistance,andnon-conductivity.However,CFRPmaterialspresentuniquechallengesintermsofmachiningprocesses,includingdrilling,duetotheiranisotropicnatureandsensitivitytodelamination.CreatingtapercountersunkholesinCFRPstructuresisoftennecessaryforjoiningcomponentsandreducingstressconcentrations.Therefore,itiscrucialtounderstandthedrillingprocessofCFRPmaterialstooptimizeholequalityandminimizedefects. 2.LiteratureReview PreviousstudieshavefocusedondifferentdrillingtechniquesforCFRPmaterials,suchasconventionaldrilling,stepdrilling,andpeckdrilling.Stepdrilling,whichinvolvesusingmultiplecuttinglevelswithgraduallyincreasingdiameters,hasshownpromisingresultsinreducingdelaminationandimprovingholequalityinCFRPmaterials.Varioustoolgeometries,suchassingle-fluteandmulti-flutedrills,havealsobeeninvestigatedtoenhancethedrillingprocess. 3.ExperimentalSetup 3.1CFRPMaterialSelection Inthisstudy,aspecificCFRPcompositematerialisselectedforinvestigation.Thematerial'sfiberorientation,content,andresintypeneedtobedescribedindetail,alongwiththecompositefabricationproces