MSA-GRR数据生成工具(原始表格)---副本备课讲稿
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MSA(MeasurementSystemAnalysis)使用数理统计和图表的方法对测量系统的分
R&R是指量具(gage)的重复性(Repeatability)和再现性(reproducibility)。
R&R数值 > 30% 表示该量具系统不能接受,须予以改进。
R&R=开根号(EV平方+ AV平方)
EV(Equipment Variation)是重复性-设备变差
AV(Appraiser Variation)是再现性-评价人变差
当R&R的值大于30%的时候,表面设备变差和评价人变差超过了标准允许的范围,量具的重复性
对测量系统的分辨率和误差进行分析,以评估测量系统的分辨率和误差对于被测量的参数来说是否合适,并确定测量roducibility)。
准允许的范围,量具的重复性和再现性结果不可接受,必须改进!
数来说是否合适,并确定测量系统误差的主要成分。
设备名称:目标尺寸:测量人数:3%EV 值:14.48%评估日期:尺寸编号:上限尺寸:实验次数:3%AV值:9.24%统计人员:工件机种:下限尺寸:样品数量:10%GR&R 值:17.18%评定结果:0.600.5514.48%9.24%n=样品数量r=实验次数17.18%98.51%8.09ndc ≥5可接受1) Values for D3, D4 and K1 are selected dependent on the number of trials 2) Value for K2 is dependent on the number of operators 常数D4K1K23) Value for K3 is dependent on the number of parts2 3.270.88620.70714) Identify root cause for any ranges above UCL, repeat measurements with same3 2.580.59080.5231operator and parts or discard those results and reaverage, then recalculate results.45) AV defaults to zero if a negative is calculated under the square root sign.56) The ndc is the number of distinct categories67) ndc<2 (Not acceptable), ndc =2 to 4 (Attribute Data), ndc>=5 (Acceptable)78) Interpretation of R&R results shown below:8Percentage GRR Result Action 9Under 10%Acceptable None 1010~30%May be acceptable ReviewOver 30%Not acceptableReject重复性—设备变差%GRR=100[GRR/TV]GRR=0.0031零件变异%EV=100[EV/TV]EV=0.0026再现性—设备变差%AV=100[AV/TV]AV=0.0017重复性和再现性0.3146ndc=1.41(PV/GRR)TV=0.0180K30.70710.52310.44670.40300.37420.35340.33750.3249%PV=100[PV/TV]PV=0.0177总变差0.0020.0040.0060.0080.010.01212345678910极差图A B C UCL0.5000.5500.600 0.6500.700 12345678910均值图A B C UCL LCL1K R EV ⨯=))/(()(222nr EV K X AV DIFF -⨯=22AV EV GRR +=3K R PV P ⨯=22PV GRR TV +=。