《精密检测技术》英文课件-任务一阶梯轴检测

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PrecisionMeasurementTechnology》主讲人：赵慧、杨国星TianjinLightIndustryVocationalTechnicalCollegeI

IIIIIIVVVIFundamentalsofCoordinateMeasurementApplication

DimensionalErrorDetectionShapeErrorDetectionDirectionalErrorDetection

PositionalErrorDetection

RunoutErrorDetectionVII

CurveandSurfaceDetectionVIII

ExtendedContentTaskI:RunoutErrorDetection[TaskIntroduction]

Thedrawingofthesteppedshaftpartisshowninthefigure.Thispartincludesmultipledimensionalerrorandrunouterrordetectiontasks.Itisrequiredtouseacoordinatemeasuringmachine(CMM)tocompletetherelevantinspectionsandgenerateameasurementreport.[RelatedKnowledge]I.CircularRunoutTolerance

Thecommonnotationandinterpretationofcircularrunouttoleranceareshowninthetable.ShapetoleranceitemsLabelingExampleInterpretationMeaningofInterpretationRadialCircularRunout

TheradialcircularrunouttoleranceofthemeasuredcylindricalsurfacerelativetodatumAis0.8mm.

Inanycross-sectionperpendiculartodatumA,theextracted(actual)circlemustliewithintwoconcentriccirclescenteredonthedatumaxisA,witharadialdifferenceof0.8mm.[RelatedKnowledge]I.CircularRunoutToleranceShapetoleranceitemsLabelingExampleInterpretationMeaningofInterpretationAxialCircularRunout

TheaxialcircularrunouttoleranceoftherightendfacerelativetothedatumaxisDis0.1mm.

Inanycylindricalcross-sectioncoaxialwithdatumaxisD,theextracted(actual)circlemustliewithintwoconcentriccircleswithanaxialdistanceof0.1mm.InclinedCircularRunout

TheinclinedcircularrunouttoleranceofthemeasuredsurfacerelativetodatumaxisCis0.1mm.

Inanyconicalcross-sectioncoaxialwiththedatumaxis,theconicalsurfaceregionisdefinedbytwocirclesspacedbythetolerancevaluet.[RelatedKnowledge]II.CircularRunoutErrorandEvaluation

Circularrunouterrorreferstothedeviationoftheactualmeasuredfeaturefromtheidealfeature.Theacceptancecriterionisthatthecircularrunouterrorvaluemustnotexceedthespecifiedcircularrunouttolerancevalue.Takingradialcircularrunoutasanexample,clickon"Form&Position"→"Runout"→"RadialRunout"inthemenubar.Underthe"Properties"tab,the"RadialRunout"iconappears.Double-clicktoopenit,anda"RadialRunout"dialogboxwillpopup.Themeaningsofeachiconinthisdialogboxareillustratedinthecorrespondingfigure.Inthe"Element"section,selectthemeasuredelement,setthereferencedatum,modifytheidentifier,andinputthetolerancevalue.Thiscompletestheevaluationofthecircularrunouterror.[RelatedKnowledge]III.RunoutErrorDataAnalysis

Takingradialrunoutasanexample,clickonthe"RadialRunout"dialogbox,whichwillbringupthe"PiWebReporting"dialogbox,asshowninthefigure.Clickthe"Plot"buttontoopenthe"PlotProtocol"graphicalreportinterface,asshowninthefigure,whichisusedforanalyzingtheradialrunouterrordata.[TaskImplementation]I.OrganizingMeasurementItems

Organizeandnumberthemeasurementitemsasshowninthefigureandassignnumberstothemeasuredelements.

[TaskImplementation]Formthemeasurementitemtableasshownbelow.SerialNumberMeasurementItemDescription1Ф33.2±0.05DiameterofCylinder22AxialRunout0.05(DatumA)AxialRunout0.05ofPlane1relativetoDatumA(theaxisofCylinder1)3RadialRunout0.02(DatumA)RadialRunout0.02ofanycross-sectionalcircleonCylinder2(e.g.,Circle1)relativetoDatumA(theaxisofCylinder1)[TaskImplementation]II.DeterminingtheClampingSchemeBasedontheprinciplesofworkpiececlamping,theclampingschemeshowninthefigureisadoptedtoensurethatallelementscanbemeasuredinasinglesetup.[TaskImplementation]II.ProbeSelectionandCalibration

Forsensorswitharotatingprobeholder,theL58D3probecanbeselected.Theprobesselectedare1_A0B0,3_A0B90,and5_A180B90,andtheyshouldbecalibrated.Forfixedsensors,probes1,3,and5canbechosen.Thistaskwillfocusonthesensorwitharotatingprobeholderasanexampleforexplanation.[TaskImplementation]IV.EstablishingtheBasicCoordinateSystemInthe"MeasurementProgram"functiontab,clickthedesignatedbuttontoopenthe"LoadorModifyEstablishedBasicCoordinateSystem"dialogbox,asshowninthefigure.Usethedefaultsettingsandclickthe"OK"buttontoopenthe"BasicCoordinateSystem"dialogbox.Followthecontentshowninthefiguretoselectthecorrespondingelementsandestablishthecoordinatesystem.[TaskImplementation]IV.EstablishingtheBasicCoordinateSystem

Theestablishedcoordinatesystemisdisplayedasshowninthefigure.[TaskImplementation]V.CreatingtheSafetyPlane

Inthe"MeasurementProgram"functiontab,click,andthe"SafetyPlane"dialogboxappearsasshowninthefigure.Clickthe"PredefineSafetyPlanefromCADModel"button,andinthepop-up"BoundaryDistance"dialogbox,setthedefaultvalueto10mm.Clickthe"OK"buttontocompletethecreationofthesafetyplane.[TaskImplementation]VI.DefiningElementsandStrategiesDefinetheelementssequentiallyaccordingtothemeasurementelementnumbersandsetthemeasurementstrategiesandevaluationparametersasspecifiedinthetable.SerialNumberElementMeasurementStrategyandEvaluationSettingsRemarks1Cylinder1Scanthreecircularlayers,atleast425pointsperlayer,enablefilteringandoutlierrejection,low-passfilterparameter:50UPR. Dual-probemeasurementofcircularpaths,refertothecontentsettingsofthereferencegauge.2Plane1Scananannularpathontheplane,stepintervalof0.1mm,enablefilteringandoutlierrejection,low-passfilterparameter,cutoffwavelength:0.8mm.RefertotheCOOKBOOK.3Circle1Circularpathscan,atleast1270points,enablefilteringandoutlierrejection,low-passfilterparameter:150UPR.RefertotheCOOKBOOK.4Cylinder2Scanthreecircularlayers,atleast1270pointsperlayer,enablefilteringandoutlierrejection,low-passfilterparameter:150UPR.RefertotheCOOKBOOK.[TaskImplementation]VII.DefiningFeatures1.Definethefeature"Ф33.2±0.05"Inthemenubar,click"Dimensions"→"Standard"→"Diameter."Underthe"Features"tab,the"Diameter"iconwillappear.Double-clicktoopenit,andthe"Diameter"dialogboxwillpopup.Definethefeature"Ф33.2±0.05"asshowninthefigure.2.Definethefeature"AxialRoundness0.05(DatumA)"Inthemenubar,click"ShapeandPosition"→"Run-out"→"AxialRun-out."Underthe"Features"tab,the"AxialRun-out"iconwillappear.Double-clicktoopenit,andthe"AxialRun-out"dialogboxwillpopup.Definethefeature"AxialRoundness0.05(DatumA)"asshowninthefigure.[TaskImplementation]VII.DefiningFeatures3.DefiningtheFeature"RadialRun-out0.02(DatumA)"Inthemenubar,click"ShapeandPosition"→"Run-out"→"RadialRun-out."Underthe"Features"tab,the"RadialRun-out"iconwillappear.Double-clicktoopenit,andthe"RadialRun-out"dialogboxwillpopup.Definethefeature"RadialRun-out0.02(DatumA)"asshowninthefigure.[TaskImplementation]VIII.

RunningtheProgramandDebuggingCheckthefivesafetyitemsandsetthesafetyparametersaccordingtothecontentsshowninthetable.