Cmk-计算表格

零件名称Description质量特性Characteristic图号DrawingNo.规格值Dimension抽样数量Qty.sampling公差上限UL计算日期Date公差下限LL12345678910□新的订单分布中心distributioncenter#DIV/0!标准中心CL0.0000□新的模具□新的设备#DIV/0!□公差缩小#DIV/0!□过程更改#DIV/0!□设备大修□异地生产□调整中心(分布中心与标准中心趋于重合)Cmk↑□长期停产□放宽公差(需经顾客同意)Cm↑□定期测定□改用更高精度设备Cm↑□顾客要求□其它：统计/日期：批准/日期：表单编号:实测数据IndividualReadings设备编号工序名称workingprocedureNo.─CMKANALYZEREPORT单位车间设备名称machine测定时机偏移系数：K=ABS[2AVE(X)-TU-TL]/(TU-TL)=标准偏差：=0.75*STDEV(X1～X50)=机器能力指数(Cmk≥1.67)机器能力指数：Cmk=(1-k)*(T/8σ)=如需要可采取以下措施(Cmk＜1.67时)37.0237.02437.02837.03237.036161116212631364146分布中心3737.00437.00837.01237.01637.0237.024分布中心PartNameQualityCharacteristicsDrawingNo.NominalSamplingQty.USLDateLSL12345678910□NewPODistributionCenter#DIV/0!CL0.0000□NewTooling□NewMachine#DIV/0!□TightenTolerance#DIV/0!□ProcessChange#DIV/0!□MajorBreakdown□LocationChange□ShiftprocesscentertoCLascloseaspossibleCmk↑□StopProduction□RequestcustomertoloosentoleranceCmk↑□PeriodicalInspection□ChangetomoreprecisiontoolingorequipmentCmk↑□CustomerRequirement□Others:Prepare/Date:Check/Date:ReportNo.:ConditionCOV:k=ABS[2AVE(X)-TU-TL]/(TU-TL)=StandardDeviation:=0.75*STDEV(X1～X50)=MachineCapabilityIndex(Cmk≥1.67)MachineCapabilityIndex:Cmk=(1-k)*(T/8σ)=PleasetakethefollowingactionswhenCmk＜1.67IndividualReadingsMachineNumberProcessNameCmkREPORTWorkstationMachineModelAMachineCapabilityStudyisnot,strictlyspeaking,partofStatisticalProcessControl,asitdoesnotdetectthepresenceorabsenceofspecialcauses.Instead,itprovidesasnapshotofoneparticularcomponentofaprocess,oftenamachine(hencethetitle).Thiscouldwellbeofuseinthecontextof,forexample,carryingoutatrialrunonamachinebeforeagreeingtobuyit(liketestdrivingacar).AMachineCapabilityStudyisessentiallyawayofestablishingthecapabilityofthecomponent/machinebyassessinghowitoperates:overaveryshortperiodoftimeinanidealenvironmentByanidealenvironment,wemeanoneinwhich:themachineissetascloseaspossibletoitsoptimumvaluesitisbeingoperatedbyanexperiencedmemberofstaffitisisolatedfromthenormalworkingenvironment(andthusunlikelytobeaffectedbyspecialcausevariation)thestudytakesplaceoveraveryshortperiodoftimeTypically,about50outputsoftheprocesswouldprovidedataforaMachineCapabilityStudy.Thismayvarydependingontheoutputs.Forexample,anhour'soutputofnailsmightbemorethanenough,whereasproducing50backaxlesmightnotbepractical.