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1、基于端面微磨削的硬脆材料磨削力建模研究ABSTRACTWiththedevelopmentofscienceandtechnology,miniaturizationpartshavebeenappliedextensivelyinthefieldsofaerospace,defense,machineryetc.Thehardandbrittlematerials,suchasengineeringceramicandglass,havegoodmechanicalpropertiesandphysicalpropertieswhic
2、harehighhardness,highstrength,thegoodabrasionresistanceandsoon.Theycanbeusedinreliablyandpersistentlyinhighpressure,highspeedandoverloadedenvironment,especiallyinhigh-profileindustries.Hardandbrittlematerialswiththeirspecialcharacteristicsandcomponentsofminiaturizationar
3、edifficultlyprocessedandthenlimitedtopopularizationandapplication.Theexistingmicromachiningmethodsformicropartswithcomplicatedsurfacehavemanydisadvantages,sofar.Inordertomakeitmoresuitableforpracticalproductions,thispaperadoptstheendmicrogrindingmachiningmethodtosolvesom
4、eproblemsexistinginthemicrogrinding.Grindingforcesareimportantcharacteristicparametersofmicrogrindingmechanismresearch,thisarticlemainlyaimsatgrindingforcesofmicroendgrindingofhardandbrittlematerials.Duetothecuttingdepthofmicroendgrindingisfixed,theundeformedchipthicknes
5、sisanimportantparameterconnectingthegrindingparametersandgrindingresults.Basedontheexistingresearchonmicrogrindingmechanism,theanalysisofthesinglediamondgritsisveryimportantonaccountofthemicrogrindingdepthandtheratioofparticleradiusisfarlessthan1.ThisarticlefromtheAngleo
6、fthesinglediamondgritsmaterialremovalisstudied.Firstly,thephasesofdifferentgrindingwaysinthemicrogrindingprocessareanalyzed,andthecriticallocationsofthedeformationmodelofthechipthicknessaresetupthroughstudyingthemechanismofbrittle-ductiletransition.Secondly,thepaperestab
7、lishesthemodelsoftheinstantaneouscuttingthickness,notdeformationmodelofchipthickness,singlediamondgrindingforce,andthewholeworkpieceforcemodelcombinedwiththestaticdistributionofthegrindingwheelongrindinggrain.Atlast,simulationofsinglediamondgritsalongwiththechangeofproce
8、ssparametersandmachiningsurfacequalityalongwiththechangeofgrindingforceandmachiningparametersarestudied
