芳纶纤维复合材料高速钻削过程刀具磨损行为研究

芳纶纤维复合材料高速钻削过程刀具磨损行为研究摘要：芳纶纤维复合材料是一种重要的结构材料，在航空、航天、汽车工业等领域有广泛应用。钻削是加工该材料的一种重要方法，但芳纶纤维复合材料的高硬度、高强度、高韧性等特性使得其加工难度较大，钻削刀具的磨损也较为严重。本文针对芳纶纤维复合材料高速钻削过程中刀具磨损行为进行了系统研究。通过实验测试和数值模拟的方法，分析了钻削参数、材料性质、切削力等因素对刀具磨损行为的影响。研究发现，在钻削中，刀具磨损主要包括刃口磨损、刃尖磨损、刃部裂开等类型，其中刃口磨损最为严重。此外，钻削参数的选择对刀具磨损行为也有一定影响，适当调节钻削速度和进给量可以减少刀具磨损。最后，提出了优化钻削参数、改进刀具材料和减少材料内部损伤等措施，以减少芳纶纤维复合材料高速钻削过程中的刀具磨损，提高加工效率和材料使用寿命。

关键词：芳纶纤维复合材料；高速钻削；刀具磨损；切削力；钻削参数；数值模拟

Abstract:Aramidfibercompositematerialisanimportantstructuralmaterial,whichhasbeenwidelyusedinfieldssuchasaviation,aerospace,andautomotiveindustry.Drillingisanimportantmethodformachiningthismaterial,butthehighhardness,strengthandtoughnessofaramidfibercompositematerialsmakeitdifficulttoprocess,andthewearofdrillingtoolsisalsosevere.Inthispaper,thewearbehaviorofcuttingtoolsduringthehigh-speeddrillingprocessofaramidfibercompositematerialswassystematicallystudied.Theinfluenceofdrillingparameters,materialproperties,andcuttingforcesonthewearbehaviorofcuttingtoolswasanalyzedthroughexperimentaltestsandnumericalsimulations.Theresultsshowedthatthewearofcuttingtoolsduringdrillingmainlyincludesedgewear,pointwear,andflankwear,amongwhichedgewearisthemostsevere.Inaddition,theselectionofdrillingparametersalsohasacertaininfluenceonthewearbehaviorofcuttingtools,andappropriateadjustmentofdrillingspeedandfeedratecanreducetoolwear.Finally,measuressuchasoptimizingdrillingparameters,improvingtoolmaterials,andreducinginternaldamageofmaterialsareproposedtoreducetoolwearduringhigh-speeddrillingofaramidfibercompositematerials,improvemachiningefficiencyandmaterialservicelife.

Keywords:Aramidfibercompositematerial;High-speeddrilling;Toolwear;Cuttingforce;Drillingparameters;NumericalsimulationInrecentyears,aramidfibercompositematerialshavebeenwidelyusedinvariousfieldsduetotheirhighstrength,wearresistance,andexcellentthermalstability.However,duetotheirhighhardnessandbrittleness,itisdifficulttomachinethesematerials,andtoolwearisamajorissueduringhigh-speeddrilling.

Inordertoreducetoolwearduringhigh-speeddrillingofaramidfibercompositematerials,itisnecessarytooptimizethedrillingparameters.Thecuttingspeedandfeedrateshouldbeadjustedappropriatelytoreducethecuttingforceandheatgeneratedduringmachining.Inaddition,thecuttingfluidshouldbeselectedcarefullytoreducethefrictionandwearofthetool.

Numericalsimulationisaneffectivemethodtostudythecuttingprocessofaramidfibercompositematerials.Bysimulatingthecuttingprocess,thecuttingforce,temperaturedistribution,andtoolwearcanbepredictedaccurately.Basedonthesimulationresults,optimizationofthedrillingparameterscanbeachievedtoreducetoolwearandimprovemachiningefficiency.

Moreover,thedevelopmentofnewtoolmaterialscanalsoeffectivelyreducetoolwearduringhigh-speeddrillingofaramidfibercompositematerials.Theuseofdiamond-coatedtoolsorceramictoolscansignificantlyimprovethetoollifeandreducethecuttingforceandheatgeneratedduringmachining.

Finally,reducingtheinternaldamageofmaterialscanalsoeffectivelyreducetoolwearduringhigh-speeddrilling.Bycontrollingthecuttingforceandheatgeneratedduringdrilling,theinternaldamageofmaterialscanbeminimized,therebyreducingtoolwearandimprovingmaterialservicelife.

Insummary,reducingtoolwearduringhigh-speeddrillingofaramidfibercompositematerialsisacomplexissuethatrequiresacomprehensiveapproach.Byoptimizingdrillingparameters,improvingtoolmaterials,andreducinginternaldamageofmaterials,thetoolwearcanbeeffectivelyreduced,therebyimprovingmachiningefficiencyandmaterialservicelifeAdditionalfactorsthatmayimpacttoolwearduringhigh-speeddrillingofaramidfibercompositematerialsincludethetypeandconcentrationofcuttingfluidsused,thecoolingandlubricatingpropertiesofthesefluids,andthegeometryofthedrillbit.

Cuttingfluidscanhaveasignificantimpactonthetoolwearduringhigh-speeddrillingofaramidfibercompositematerials.Ingeneral,usingacuttingfluidwithgoodcoolingandlubricatingpropertiescanhelpreducetheamountofheatgeneratedduringdrilling,therebyreducingtheriskoftoolwear.However,differenttypesofcuttingfluidscanhavedifferenteffectsontoolwear.Forexample,water-basedcuttingfluidsmaybemoreeffectiveinreducingtoolwearcomparedtooil-basedcuttingfluids,buttheycanalsoincreasetheriskofmaterialdamageduetotheirhighreactivitywithcertaintypesofcomposites.

Theconcentrationofcuttingfluidsusedcanalsoaffecttoolwear.Generally,higherconcentrationsofcuttingfluidscanprovidebettercoolingandlubrication,buttheycanalsoincreasetheriskofmaterialdamageandmaynotbesuitableforalltypesofcompositematerials.Inaddition,theconcentrationofcuttingfluidsmayneedtobeadjusteddependingonthedrillingparametersused,suchasthedrillingspeedandfeedrate,toensureoptimalcoolingandlubrication.

Thegeometryofthedrillbitcanalsoplayaroleintoolwearduringhigh-speeddrillingofaramidfibercompositematerials.Forexample,drillbitswithsharpercuttingedgesandsmallerpointanglesmaybemoreeffectiveinreducingtoolwearcomparedtothosewithdullercuttingedgesandlargerpointangles.Choosingtherightdrillbitgeometrymayalsohelpreducetheamountofheatgeneratedduringdrilling,whichcanfurtherreducetheriskoftoolwear.

Overall,reducingtoolwearduringhigh-speeddrillingofaramidfibercompositematerialsrequiresathoughtfulandcomprehensiveapproachthatconsidersarangeoffactors,fromdrillingparametersandtoolmaterialstocuttingfluidsanddrillbitgeometry.Byoptimizingthesefactors,manufacturerscanimprovemachiningefficiency,reducematerialwaste,andimprovethedurabilityoftheircompositeproductsInadditiontothefactorsmentionedabove,thereareotherconsiderationsthatcanalsoimpacttoolwearduringhigh-speeddrillingofaramidfibercomposites.Oneoftheseisthequalityofthecompositematerialitself.Ifthecompositehasinconsistentfiberorientationorcontainsvoids,thiscanleadtovariationsinmaterialpropertiesandcreatelocalizedareasofhighstressduringmachining,whichcanacceleratetoolwear.

Anotherconsiderationistheuseofpilotholesorpre-drilling.Forsomecompositematerials,especiallythosewithhighfibercontentorwovenreinforcement,itmaybebeneficialtopre-drillasmallholebeforedrillingthefinaldiameter.Thiscanhelptoreducetheforcesandstressesonthecuttingtoolandpreventdelamination,whichcanoccurwhenthematerialissubjectedtotoomuchstressatonce.

Theuseofcoolingandlubricationisalsoimportantforreducingtoolwearduringhigh-speeddrillingofaramidfibercomposites.Asmentionedearlier,theheatgeneratedduringdrillingcansoftenormeltthecompositematerial,whichcanleadtotoolwearanddamage.Usingacoolantorlubricantcanhelptodissipatethisheatandimprovechipevacuation,whichcanfurtherreducetheriskoftoolwear.

Finally,itisimportanttoselecttheappropriatecuttingtoolforthespecificcompositematerialbeingdrilled.Whilecarbideanddiamond-coatedtoolsarecommonlyusedforhigh-speeddrilling,therearemanydifferenttoolgeometriesandcoatingsthatcanbeoptimizedfordifferentmaterialsandapplications.Workingwithatoolvendororcompositemachiningexpertcanhelpmanufacturersidentifythebesttoolfortheirspecificapplicationandoptimizetheirmachiningprocessesaccordingly.

Inconclusion,reducingtoolwearduringhigh-speeddrillingofaramidfiberc