MSA测量系统分析英文版.ppt

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1、SPCforTestSystem§GaugeR&R1有多少個黑點？2這些橫線是不是平行的？3是靜的還是動的？4三個正方形5幾何謎題6沒有適當的量測工具就無法管理品質!!7比較式絕對式待測量轉換訊息標準值顯示量測儀量測之種類待測量標準量轉換訊息轉換訊息比測儀顯示轉換放大8BasicConceptsEveryProcessproducea“Product”.EveryproductpossessesQualities(Features)EveryQualityFeatureCanbemeasuredTotalVariation=ProductVariati

2、on+MeasurementVariationSomeVariationInherentinSystemDesign.SomeVariationisduetoaFaultyperformanceoftheSystem(s).9ComponentsofMeasurementSystemEquipmentorGageTypeofGage:Attribute:go-nogo,visionsystemsVariable:calipers,probe,coordinatemeasurementmachinesUnitofMeasurement-discrimin

3、ationAtleast1/10of6*processstandarddeviation(6s)Otherrules:atleast1/10oftoleranceOperator&OperatingInstructionsPartlocatingororientationschemeagagemustbeabletoconsistentlylocatethepartbeingmeasured.10TermsYouShouldKnow•Measurementsystem:Thecollectionofoperations,procedures,gages

4、andpersonnelusetoobtainmeasurementsofworkpiececharacteristics•Gage:Adeviceusedtoobtainmeasurements•Repeatability:Repeatability(Precision)Thevariationinmeasurementobtainedwithonemeasurementinstrumentwhenusedbyoneoperatortomeasure.)anidenticalcharacteristiconthesamepart.(EV:Equipm

5、entVariation•Reproducibility:Thevariationintheaverageofthemeasurementsmadebydifferentoperatorsusingthesamemeasurementinstrumentwhenmeasuringidenticalcharacteristicsonthesamepart.(AV:AppraiserVariation)11TermsYouShouldKnow•Bias:Thedifferencebetweentheobservedaverageofmeasurements

6、andthereferencevalue.•PercentR&R:Thepercentageofprocessvariationrelatedtothemeasurementsystemforrepeatabilityandreproducibility•Stability:Thetotalvariationinthemeasurementsobtainedwithameasurementsystemonthesamemasterorpartswhenmeasuringsinglecharacteristicsoveranextendedtimeper

7、iod.•Linearity:Thedifferenceinthebiasvaluesthroughtheexpectedoperatingrangeofthegage.121.AccuracyDifferencebetweenthetrueaverageandtheobservedaverage(trueaveragemaybeobtainedusingamoreprecisemeasuringtool)132.ReproducibilityVariationinaverageofmeasurementsmadebydifferentoperator

8、susingthesamegagemeasuringthesamepart.Appraiser