机械制造技术基础双语第5章ppt课件.ppt

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1、河南科技大学机电工程学院机械制造技术基础FundamentalsofManufacturingTechnology第5章机械加工质量分析与控制作者：任小中单位：河南科技大学制作时间：2014年10月AnalysisandControlofMachiningQuality2021/8/17河南科技大学机电工程学院25.1.1IntroductiontomachiningqualityMachiningquality5.1Introduction概述Physicalandmechanicalperformance物理力学性能Waviness波度Surfaceroughn

2、ess表面粗糙度表面质量SurfacequalitiesGeometricaccuracy几何精度Formaccuracy形状精度加工精度Machiningaccuracy加工质量MachiningqualitiesMutualpositionaccuracy尺寸精度Dimensionaccuracy尺寸精度Fig.5-1Contentsofmachiningquality机械加工质量的内容2021/8/17河南科技大学机电工程学院35.1.2BasicconceptsofmachiningaccuracyMachiningaccuracyandmachininge

3、rrorMachiningaccuracymeansthetallyinglevelofthegeometricparametersofworkpiecemachinedwiththatofidealworkpart.Machiningerrormeansthedeviationdegreeofthepracticalgeometricparametersofworkpiecemachinedfromtheidealgeometricalparameters.Machiningaccuracyandmachiningerroraretheindexesusedtoe

4、valuatetheexactnessofgeometricparametersofworkpiecefromdifferentside.Themagnitudeofmachiningerrordenotesthegradeofthemachiningaccuracy.5.1Introduction概述2021/8/17河南科技大学机电工程学院45.1.2BasicconceptsofmachiningaccuracyEconomicalmachiningaccuracyItmeanstheaccuracywhichcanbeeasilygainedbyaspeci

5、ficmachiningmethodunderthenormalproductionconditions.Normalproductionconditionsmeanusingtheequipmentconformingtothequalitystandardandtheworkerswithstandardtechniquegrade,andnotprolongingthemachiningtime.Machiningerrorisalwaysinverselyproportionaltomachiningcost,asshowninFig.5-2.5.1Intr

6、oduction概述2021/8/17河南科技大学机电工程学院55.1.2BasicconceptsofmachiningaccuracyEconomicalmachiningaccuracyisnotafixedvalue,andischangingwiththepassageoftimeandtheprogressoftechnology,asshowninFig.5-3.5.1Introduction概述Fig.5-2RelationofmachiningerrortocostCΔ0ABError（μm）196010-110-210-3192020001021

7、01100TimeFig.5-3Relationofmachiningerrortotime一般加工精密加工超精密加工2021/8/17河南科技大学机电工程学院65.1.2BasicconceptsofmachiningaccuracyMethodstostudymachiningaccuracySinglefactoranalyzingmethodBymeansofanalysis,calculationorexperimentetc.tostudytheeffectofaspecificfactoronmachiningaccuracy.Statistica