《精密检测技术》英文课件-任务二传动轴检测

《PrecisionMeasurementTechnology》主讲人：赵慧、杨国星TianjinLightIndustryVocationalTechnicalCollegeI

IIIIIIVVVIFundamentalsofCoordinateMeasurementApplication

DimensionalErrorDetectionShapeErrorDetectionDirectionalErrorDetectionPositionalErrorDetectionRunoutErrorDetectionVIICurveandSurfaceDetectionVIIIExtendedContentTaskII–DriveShaftInspection[TaskIntroduction]Asshowninthefigure,thepartdrawingofthedriveshaftincludesinspectionitemsrelatedtodimensionalerrorsandrunouterrors.Itisrequiredtocarryouttheinspectionofthecorrespondingitemsusingacoordinatemeasuringmachine(CMM)andtogenerateacomprehensiveinspectionreport.[RelatedKnowledge]I.TotalRunoutTolerance

Thespecificationandinterpretationoftotalrunouttoleranceareshowninthetable.

ShapetoleranceitemsLabelingExampleInterpretationMeaningofInterpretationRadialTotalRunout

TheradialtotalrunouttoleranceofthemeasuredcylindricalsurfacerelativetothecommondatumaxisA-Bisφ0.1mm.

Theextracted(actual)surfaceshallbeconfinedbetweentwocoaxialcylindricalsurfaceswhoseradialdifferenceisequalto0.1,sharingthesameaxisasthecommondatumA-B.AxialTotalRunout

Theaxialtotalrunouttoleranceoftheright-endfacerelativetothedatumaxisAis0.05mm.

Theextracted(actual)surfaceshallbeconfinedbetweentwoparallelplanesspaced0.1apartandperpendiculartothedatumaxisD.[RelatedKnowledge]

II.TotalRunoutErrorandEvaluation

Totalrunouterrorreferstothedeviationoftheactualmeasuredfeaturefromitsidealcounterpart.Theacceptancecriterionisthatthetotalrunouterrorvaluemustnotexceedthespecifiedtotalrunouttolerance.Takingaxialtotalrunoutasanexample:Fromthemenubar,select“shape&Position”→“Runout”→“AxialTotalRunout”.Underthe“Properties”tab,the“AxialTotalRunout”iconwillappear.Double-clicktoopentheAxialTotalRunoutdialogbox.Themeaningsoftheiconsinthedialogboxareshowninthecorrespondingfigure.Inthedialogbox,clickthe“Element”buttontoselectthemeasuredfeature,setthedatum,editthelabel,andinputthetolerancevalue—thuscompletingtheevaluationofthetotalrunouterror.[RelatedKnowledge]III.TotalRunoutErrorDataAnalysis

Takingaxialtotalrunoutasanexample,clickwithintheAxialTotalRunoutdialogboxtoopenthePiWebReportinginterface,asshowninthefigure.Then,clickthe“Plot”buttontodisplaythePlotProtocolReportinterface,asillustrated.Thisreportisusedforanalyzingtheaxialtotalrunouterrordata.[TaskImplementation]I.StructuringofMeasurementItems

Themeasurementitemsareorganizedandnumberedsystematically.Themeasuredfeaturesarealsoassignedcorrespondingidentifiers,asillustratedinthefigure.

[TaskImplementation]Formthemeasurementprojecttableasshowninthefigure.SerialNumber

MeasurementItem

Description1

DiameterofCylinder12Cylindricity:0.08mmCylindricityofCylinder13RadialCircularRunout:0.012mm(DatumA-B)Radialcircularrunoutofanycross-sectionalcircle(e.g.,Circle1)onCylinder1relativetoDatumA-B(thecommonaxisofCylinder1andCylinder2)4

DiameterofCylinder25Cylindricity:0.08mmCylindricityofCylinder26

RadialCircularRunout:0.012mm(DatumA-B)Radialcircularrunoutofanycross-sectionalcircle(e.g.,Circle2)onCylinder2relativetoDatumA-B(thecommonaxisofCylinder1andCylinder2)7RadialTotalRunout:0.025mm(DatumA-B)TotalradialrunoutofCylinder3relativetoDatumA-B(thecommonaxisofCylinder1andCylinder2)8

DiameterofCylinder3[TaskImplementation]II.DeterminingtheClampingSchemeBasedontheprinciplesofworkpiececlamping,theclampingschemeshowninthefigureisadoptedtoensurethatallfeaturescanbemeasuredinasingleclampingoperation.[TaskImplementation]III.ProbeSelectionandCalibration

Forsensorswitharotatingmeasuringbase,theL58D3probecanbeselected,withprobedirections1_A0B0and5_A180B90chosenforcalibration.Forfixedsensors,star-shapedprobestructures1and3canbeselected.Thistaskwillbedemonstratedusingasensorwitharotatingmeasuringbaseasanexample.[TaskImplementation]IV.EstablishingtheBasicCoordinateSystemUnderthe"MeasurementProgram"functiontab,clickontheicon,whichwillopenthe"ReadEstablishedorModifiedBasicCoordinateSystem"dialogbox,asshowninthefigure.Usethedefaultsettingsandclickthe"OK"buttontoopenthe"BasicCoordinateSystem"dialogbox.Followthestepsinthefiguretoselectthecorrespondingelementstoestablishthecoordinatesystem.Thecoordinatesystem,onceestablished,willbedisplayedasshowninthefigure.

[TaskImplementation]IV.EstablishingtheBasicCoordinateSystem

[TaskImplementation]V.CreatingaSafetyPlaneUnderthe"MeasurementProgram"functiontab,clickontheicon,whichwillopenthe"SafetyPlane"dialogboxasshowninthefigure.Clickonthe"CreateSafetyPlanefromCADModel"button.Inthepopped-up"BoundaryDistance"dialogbox,setthedefaultvalueto10mm.Clickthe"OK"buttontocompletethecreationofthesafetyplane.[TaskImplementation]VI.DefiningElementsandStrategiesForeachelement,applythecorrespondingmeasurementstrategyandevaluationsettingsasspecifiedinthetable.SerialNumberElementMeasurementStrategyandEvaluationSettingsRemarks1Cylinder1Performscanningalongthreecircularpaths,withaminimumof1270pointsperpath.Enablebothfilteringandgrosserrorelimination.Filteringparameter:low-passfilterat150UPR.Dual-probecircularpathmeasurements,bothconfiguredaccordingtothestylusgaugesettings2Cylinder2Performscanningalongtwocircularpaths,withatleast1270pointsperpath.Enablebothfilteringandgrosserrorelimination.Filteringparameter:low-passfilterat150UPR.Dual-probecircularpathmeasurements,bothconfiguredaccordingtothestylusgaugesettings3Circle1UsethefeaturepointsfromonecircularscanningpathofCylinder1toconstructthemeasurementelement.Usethe“CallElementPoints”function4Circle2UsethefeaturepointsfromonecircularscanningpathofCylinder2toconstructthemeasurementelement.Usethe“CallElementPoints”function5Cylinder3Performscanningalongthreecircularpaths,withatleast425pointsperpath.Enablebothfilteringandgrosserrorelimination.Filteringparameter:low-passfilterat50UPR.RefertotheCOOKBOOK6SymmetryPoint1Selectonepointoneachfaceofthekeywaytodefinethemeasurementelement.Usethe"SymmetryPoint"element7SteppedCylinderA–BUsethefeaturepointsfromCylinders1and2toconstructtheelement.Usethe“CallElementPoints”function8Plane1Single-pointstrategy:uniformlydistribute4points.[TaskImplementation]VII.DefiningFeatures1.Definingthe“”FeatureInthemenubar,click"Size"→"Standard"→"Diameter".The"Diameter"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"Diameter"dialogbox,anddefinethediameterfeatureaccordingtothecontentshowninthefigure.2.Definingthe"Cylindricity0.008"FeatureInthemenubar,click“ShapeandPosition"→"Cylindricity".The"Cylindricity"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"Cylindricity"dialogboxanddefinethe“Cylindricity0.008”featurebasedonthefigure.[TaskImplementation]VII.DefiningFeatures3.Definingthe"RadialRunout0.012(DatumA-B)"FeatureInthemenubar,click“ShapeandPosition"→"Runout"→"RadialRunout".The"RadialRunout"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"RadialRunout"dialogboxanddefinethe“RadialRunout0.012(DatumA-B)”featureasillustrated.4.Definingthe“

”FeatureInthemenubar,click"Size"→"Standard"→"Diameter".The"Diameter"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"Diameter"dialogbox,anddefinethediameterfeatureaccordingly.[TaskImplementation]VII.DefiningFeatures5.Definingthe"Cylindricity0.008"FeatureInthemenubar,click"FormandPosition"→"Cylindricity".The"Cylindricity"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"Cylindricity"dialogboxanddefinethe“Cylindricity0.008”featurebasedonthediagram.6.Definingthe"RadialRunout0.012(DatumA-B)"FeatureInthemenubar,click"FormandPosition"→"Runout"→"RadialRunout".The"RadialRunout"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"RadialRunout"dialogboxanddefinethe“RadialRunout0.012(DatumA-B)”featureaccordingtothedisplayeddata.[TaskImplementation]VII.DefiningFeatures7.Definingthe"TotalRadialRunout0.025(DatumA-B)"Feature

Inthemenubar,click"FormandPosition"→"Runout"→"TotalRadialRunout".The"TotalRadialRunout"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"TotalRadialRunout"dialogboxanddefinethe“TotalRadialRunout0.025(DatumA-B)”featureaccordingtotheillustratedsetup.8.Definingthe“

”FeatureInthemenubar,click"Size"→"Standard"→"Diameter".The"Diameter"iconwillappearunderthe"Feature"tab.Double-clicktoopenthe"Diameter"dialogbox,anddefinethediameterfeatureasshown.[TaskImplementation]VIII.ProgramExecutionandDebuggingCheckthe