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ID:52180552
大小:1.96 MB
页数:17页
时间:2020-04-02
《常用抽样检验计划.ppt》由会员上传分享,免费在线阅读,更多相关内容在PPT专区-天天文库。
1、常用之抽样计划介绍从MIL-STD105E到MIL-STD-1916前言产业界沿用已久之MIL-STD-105E表,当可被接受的不良率由%等级演变到PPM等级时,此套抽样计划逐渐被取代。汽车业界使用之TS16949规定:计数型的抽样,其接受的等级必须是零缺点。常见以下抽样方式,取代STD-105E表:C=0抽样计划表MIL-STD-1916所提供之抽样计划表MIL-STD-105EMIL-STD-105ETS16949C=0抽样计划某公司两者之OCCurven=200,Ac=3,Re=4n=68,Ac=0,Re=1AQL=0.65STD-105E抽样计划表C=0抽样计划表
2、两者之OCCurveAQL=0.065→n=200,Ac=0,Re=1MIL-STD-1916SCOPEAPPLICABLEDOCUMENTSDEFINITIONSGENERALREQUIREMENTSDETAILEDREQUIREMENTSNOTESMIL-STD-19164.GENERALREQUIREMENTS4-1Acceptancebycontractor-proposedprovisions4-2Acceptancebytable4-3Dispositionofnonconformingproduct4-4Criticalcharacteristics4-5S
3、pecialreservationsforcriticalnonconformingMIL-STD-19164-1Acceptancebycontractor-proposedprovisions4-1-1GeneralRequiresthecontractortoperformsamplinginspectioninaccordancewithparagraph4.2andtheproductspecification.Whenproperproductandprocessdesignandprocesscontrolactivitiesareeffective,sam
4、plinginspectionisaredundanteffortandanunnecessarycost.Contractorsareencouragedtoconsidersubmittingalternateacceptancemethodsforoneormorecharacteristics.4-1-2RequirementsandProceduresContractors’qualitysystemsinaccordingwithMIL-Q-9858enhancedwithSPC,ANSI/ASQCQ9004arequalifiedtoapplyforalte
5、rnateacceptancemethods.ThecurrentminimumvaluesofprocesscapabilityareequivalenttoaCpkof2.00forcriticalcharacteristics,1.33formajorcharacteristics,1.00forminorcharacteristics4-1-3Submissionandincorporation4-1-4WithdrawalofapprovalofalternatesMIL-STD-19164-2Acceptancebytable4-2-1Preferredsam
6、plingplansthisstandardestablishesthreesetsofmatchedsamplingplans,inspectthesamplesfromlotsbyattributesorvariablesmeasurementandforcontinuoussamplingbyattributesmeasurement.thethreesetsareindexedbysevenspecifiedverificationlevels(VL)andfivecodeletters(CL),whicharedeterminedbythelotorproduc
7、tionintervalsize.4-2-2Formationandidentificationoflotsorbatches4-2-3Determinationofsamplingplana.VLasspecified.b.Typeofsampling(attributes,variables,orcontinuous)c.LotsizeCLfromtableId.Switchingprocedure4-2-4SamplingoflotsorbatchesMIL-STD-1916MIL-STD-1916(计数型)MIL-ST
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