《精密检测技术》英文课件-任务一 定位板检测

《PrecisionMeasurementTechnology》主讲人：赵慧、杨国星TianjinLightIndustryVocationalTechnicalCollegeI

IIIIIIVVVIFundamentalsofCoordinateMeasurementApplication

DimensionalErrorDetectionShapeErrorDetection

DirectionalErrorDetection

PositionalErrorDetectionRunoutErrorDetectionVIICurveandSurfaceDetectionVIII

ExtendedContentTaskI:PositioningPlateInspection[TaskIntroduction]Thedrawingofthepositioningplatepartisshownasbelow.Thispartinvolvesmultiplegeometricerrordetectionitems,anditisrequiredtouseacoordinatemeasuringmachine(CMM)tocompletetherelevantdetectiontasksandprovideadetectionreport.[RelatedKnowledge]I.LinePositionToleranceThecommonnotationsandinterpretationsoflinepositiontolerancesareshowninthetablebelow.

LinePositionToleranceShapeToleranceItemsLabelingExampleInterpretationMeaningofInterpretationLinePositionTolerance

ThepositiontoleranceoftheholerelativetoreferenceplanesC,A,andBisφ0.08mm.

Theextracted(actual)centerlineshouldbeconfinedwithinacylindricalsurfacewithadiameterofφ0.08mm.Theaxisofthiscylindricalsurfacemustbepositionedwithinthetheoreticallycorrectlocation,whichisdeterminedbythereferenceplanesC,A,B,andthetheoreticaldimensions100and68.[RelatedKnowledge]II.PositionToleranceErrorandEvaluation

Positiontoleranceerrorreferstothevariationbetweentheactualmeasuredfeatureandtheidealfeature.Theacceptanceconditionisthatthepositiontoleranceerrormustnotexceedthepositiontolerancevalue.Inthemenubar,clickon"ShapeandPosition"→"PositionTolerance".Underthe"Properties"tab,the"PositionTolerance"iconwillappear.Double-clicktoopen,whichwillbringupthe"PositionTolerance"dialogbox.Themeaningofeachiconinthe"PositionTolerance"dialogboxisasshowninthefigure.Inthe"PositionTolerance"dialogbox,selectthemeasuredelementatthe"Element"button,setthereference,andmodifytheidentificationandtolerancevaluestocompletetheevaluationofthepositiontoleranceerror.[RelatedKnowledge]III.PositionalToleranceErrorDataAnalysis

Obtaindetailedinformationonpositionaltolerancemeasurementresultsbyclickingon“Resources”→“FeatureSettingsEdit”inthemenubar.Thiswillbringupthe“ProgramFeatureEdit”dialogbox,asshowninthefigure.Inthedropdownmenu,select“MorePositioningResults”andsetitto“On.”Thissettingensuresthatwhengeneratingthemeasurementreport,therelevantcoordinatevaluesforpositionaltolerancearedisplayed,asshowninthefigure.[TaskImplementation]I.OrganizingMeasurementItemsOrganizeandnumberthemeasurementitems,andassignnumberstothemeasuredelements,asshowninthefigure.[TaskImplementation]Formthemeasurementitemtableasshownbelow.MeasurementItemTableSerialNumberMeasurementItemsDescription1Ф30±0.02Circle1Diameter2Ф20±0.02Circle2Diameter3Roundness0.01Circle1Roundness4

PositionalToleranceofCylinder3CentralAxisRelativetoCylinder15PositionalToleranceφ0.1(DatumA,B,C)PositionalToleranceofCylinders1,2,3,and4RelativetoDatumsA,B,andC6Flatness0.02FlatnessofPlane1[TaskImplementation]II.DeterminingtheClampingSchemeBasedontheprinciplesofworkpiececlamping,theclampingschemeshowninthefigureisadoptedtoensurethatallelementscanbemeasuredinasingleclampingoperation.[TaskImplementation]III.ProbeSelectionandCalibration

Forsensorswitharotatingmeasuringbase,theL58D3probecanbeselected,andthe1_A0B0stylusshouldbeused,followedbycalibration.Forfixedsensors,theNo.1styluscanbeselected.Inthistask,anexamplewillbeprovidedusingasensorwitharotatingmeasuringbase.[TaskImplementation]IV.EstablishingtheBasicCoordinateSystemClickonthe"MeasurementProgram"tabtoopenthe"ReadEstablishedorModifiedBasicCoordinateSystem"dialogbox,asshowninthefigure.Usethedefaultsettingsandclickthe"OK"button.Thiswillopenthe"BasicCoordinateSystem"dialogbox.Followtheinstructionsinthefiguretoselectthecorrespondingelementstoestablishthecoordinatesystem.

[TaskImplementation]IV.EstablishingtheBaseCoordinateSystem

Thecoordinatesystemdisplayedaftercompletionisshowninthefigure.[TaskImplementation]

V:CreateaSafetyPlaneClickonthe"MeasurementProgram"functiontab,whichwillopenthe"SafetyPlane"dialogboxasshowninthefigure.Clickthe"CreateSafetyPlanefromCADModel"button.Inthepop-up"BoundaryDistance"dialogbox,setthedefaultvalueto10mm.Clickthe"OK"buttontocompletethecreationofthesafetyplane.[TaskImplementation]VI:DefineElementsandStrategyDefinethemeasurementelementssequentiallyaccordingtothenumberingshowninthefigure.Foreachelement,setthemeasurementstrategyandevaluationbasedonthetable.

MeasurementStrategyandEvaluationSettingsSerialNumberElementMeasurementStrategyandEvaluationSettingsRemarks1Plane1-Plane4ScanningstrategyormultipointstrategyEvenlydistributedmeasurementpoints2Circle1-Circle2circularpathscanwithatleast1270points,checkfilteringandoutlierdetection,filteringparameters:low-passfilterat150UPRrefertotheCOOKBOOK3Cylinder1-Cylinder4two-layercircularpathscanning,eachlayerwithatleast425points,checkfilteringandoutlierdetection,filteringparameters:low-passfilterat50UPRrefertotheCOOKBOOK[TaskImplementation]

VII.DefiningFeatures1.Definingthe"Ф30±0.02"FeatureInthemenubar,clickon"Dimensions"→"Standard"→"Diameter."The"Diameter"iconwillappearunderthe"Features"tab.Double-clicktoopen,whichwillpopupthe"Diameter"dialogbox.Followthecontentasshowninthefiguretodefinethe"Ф30±0.02"feature.2.Definingthe"Ф20±0.02"FeatureInthemenubar,clickon"Dimensions"→"Standard"→"Diameter."The"Diameter"iconwillappearunderthe"Features"tab.Double-clicktoopen,whichwillpopupthe"Diameter"dialogbox.Followthecontentasshowninthefiguretodefinethe"Ф20±0.02"feature.

[TaskImplementation]

VII.DefiningFeatures3.Definingthe"Roundness0.01"FeatureClickon“ShapeandPosition”→“Roundness”inthemenubar.The"Roundness"iconwillappearunderthe"Feature"functiontab.Double-clicktoopenthe"Roundness"dialogboxanddefinethe"Roundness0.01"featureasshowninthefigure.4.Definingthe"4x"FeatureClickon“Dimensions”→“Standard”→“Diameter”inthemenubar.The"Diameter"iconwillappearunderthe"Feature"functiontab.Double-clicktoopenthe"Diameter"dialogbox,andasshowninthefigure,select“Cylinder1,”“Cylinder2,”“Cylinder3,”and“Cylinder4”intheelementssectiontodefinethe"4x"feature.[TaskImplementation]VII.DefiningFeatures5.Defining"PositionToleranceφ0.1(DatumA,B,C)"FeatureClickon"ShapeandPosition"→"PositionTolerance"inthemenubar.The"PositionTolerance"iconwillappearunderthe"Features"tab.Double-clicktoopenthedialogboxfor"PositionTolerance."Followthecontentshowninthediagramtodefinethe"PositionToleranceφ0.01(DatumA,B,C)"feature.6.Defining"Flatness0.02"FeatureClickon"ShapeandPosition"→"Flatness"inthemenubar.The"Flatness"iconwillappearunderthe"Features"tab.Double-clicktoopenthe"Flatness"dialogbox.Followthecontentshowninthediagramtodefinethe"Flatness0.02"feature.[TaskImplementation]VIII.RunningtheProgramandDebugging

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