Indirect Adhesion Wear Parametric Analysis in the Dry Turning of UNS A97075 Alloys

IndirectAdhesionWearParametricAnalysisintheDryTurningofUNSA97075Alloys S.Martín‐Béjar(1),F.J.Trujillo(1),L.Sevilla(1),M.Marcos(2) (1)DepartmentofManufacturingEngineering,UniversityofMalaga,C/Dr.OrtizRamoss/n,E‐29071 Málaga,Spain;[email protected],[email protected],[email protected]. (2)DepartmentofMechanicalEngineeringandIndustrialDesign,UniversityofCadiz,Av.UniversidaddeCádiz,nº10, E‐11519PuertoReal(Cádiz),Spain;[email protected]  Keywords:AluminumAlloys;UNSA97075;DryMachining;IndirectAdhesionWear;Built‐Up‐Layer. 1.Introduction Aluminumwroughtalloys(mainly2000and7000series)arewidelyusedinthemanufacturingofstructural partsofaircraft,wheretherequirementsinhighcompressivestrength,tensionloadingorfatiguearecritical [1].Thesepartsareusuallymanufacturedusingmachiningprocesses.Inaddition,theactualtrendisusing environmentallyfriendlytechnologies,suchasdrymachining.Notwithstanding,thesecuttingconditionscause anincreaseoftoolindirectadhesionwear,whichmayresultindeviationsfromthequalityrequirements[2‐3]. Inthisworkastudyoftheinfluenceofcuttingparameters(cuttingspeed,feedanddepthofcut)onindirect adhesiontoolwearinthedrymachiningofUNSA97075Al‐Znalloyshasbeenmade.Inaddition,an experimentalmethodologyforthemeasurementofBuilt‐Up‐Layeronthetoolhasbeendeveloped.Finally, differentparametricmodelshavebeenobtained,whichallowpredictingtheBULevolutionasafunctionof cuttingparametersapplied.  2.MethodologyorExperimentalProcedure DifferentturningtestwereperformedusingcylindricalbarsofUNSA97075(Al‐Zn)Alloy,indryconditions.For eachtestanewtool(WC‐TiN)wasused.ThecuttingparametersvaluestestedareshowninTableI.Alltest lasted10s. TableI.Cuttingparameters v c (m/min) f(mm/r)ap(mm) 400.050.5 800.101.0 1700.202.0 2000.30 Therakefaceofthetoolswasoff‐linemonitoredbyusingStereoscopicOpticalMicroscopy(SOM)techniques, FigureI.Inaddition,afirstapproachtothemeasurementofthequantityofmaterialadheredonthetoolrake facewasperformedbyusingimagesanalysistechniques.  (a)  (b) Figure1.(a)SOMequipmentsetupand(b)SOMimageoftooltested. 3.ResultsandDiscussion Foralltestperformed,anindirectadhesionwearcanbeobservedbothontherakeface(BUL)andtheedgeof thetool(BUE).Thevariablewhichmostinfluencesontheintensityofthiswearisthefeed.Thesecondoneis thedepthofcutand,finally,thecuttingspeedistheleastinfluentialvariable.So,differentparametricpotential modelshavebeendeveloped(BULintensity=f(vc,f,ap)).Inaddition,theseexperimentalresultshavebeen comparedwiththoseobtainedfordifferentoutputvariables,suchasarithmeticaverageroughness(Ra)of machinedparts. 4.Conclusions Inthiswork,anexperimentalmethodologyforBULmeasurementinthedryturningofUNSA97075(Al‐Zn) Alloyhasbeendeveloped.Asaresult,aparametricmodelwhichallowspredictingtheBULintensityasa functionofthecuttingparametershasbeenobtained.  5.Acknowledgements TheauthorsthankUniversityofMalaga–AndalucíaTechCampusofInternationalExcellenceforitseconomic contributiononthispaper.  6.References [1]Dursun,T.,Soutis,C,MaterDesign.56(2014)862‐871. [2]Trujillo,F.J.,L.SevillaandM.Marcos,AdvMechEng.6(2014)1‐11. [3]Astakhov,V.From,“Surfaceintegrityinmachining”,Springer,London(UK),2010.