Treść książki
Przejdź do opcji czytnikaPrzejdź do nawigacjiPrzejdź do informacjiPrzejdź do stopki
SUMMARY
Thepaperpresentstheimpactofelectricdischargeenergyontheerosionprocessandthequalitative
effectsofmicroWireElectricalDischargeMachiningofdifficult-to-cutmaterials,i.e.Inconel718
andTi6Al4Vtitaniumalloy.Theanalysisofthestateofknowledgeinthefieldofelectricaldischarge
machiningindicatesthatduetothecomplexityofthephysicalphenomenaoccurringduringelectric
dischargesandtheirstochasticnature,therearedifficultiesinidentifyingtheimpactofmachining
parametersandconditionsontechnologicalindicators.Existingmodelsoftheerosionprocessdonot
provideclear,comparableresultsthatcanbegeneralized.Duetothedifferentcourseoftheprocess,
determinedbylow-energyelectricdischarges,withgapthicknessesintherangeof5-50umandthe
diameteroftheworkingelectrodeɸ≤100um,theuseofmicroWEDMinthemanufacturingofmi-
croelementsrequiresthedevelopmentofnewtechnologicalknowledgeforprocessing.Theresearch
focusedondeterminingtheimpactofelectricdischargeenergyonthegeometryoftracesofsingle
electricdischarges,topographicfeaturesandmorphologyoftheprocessedsurface,thicknessofthe
recastlayer,diffusionofelementsfromworkingelectrodes,andtheoccurrenceofmicrostructure
defects.Theimpactoftheelectricdischargeenergyonthephysicalphenomenadeterminingthema-
terialremovalprocessandnewpropertiesofthesurfacelayerwasassessed.Furthermore,predictive
modelsdescribingtheimpactoftheelectricdischargeenergyandparametersaffectingthestability
oftheprocessonselectedsurfaceroughnessparametersandmaterialremovalrateweredeveloped.
Regressionmodelswereusedtobuildadesirabilityfunctionformulti-criteriaoptimizationofthe
microWEDMprocessofInconel718andTi6Al4Vtitaniumalloy.Theanalysisofphysicalphe-
nomenadeterminedbytheenergyoftheelectricdischargeandthepropertiesoftheworkpiece,i.e.
thermalconductivityandmeltingtemperature,isthebasisfordevelopingtechnologiesformanufac-
turingmicroelementsandmicrotools.
Keywords:microWEDM,surfacelayerproperties,surfaceintegrity,optimization
8
