GRR 竟然 92.82%

  ypq_941 ·  2009-07-10 11:17  ·  70793 次点击
我公司有一台影像式精密测绘仪,我用校准用的标尺,取连续十个网格测量,以验证该测量仪的GRR是否合格,其测量结果我均在误差范围内,但GRR却92.82%,问题出在什么地方呢?迷惑呀
操作者部件号测量结果
A11.0002
A20.9944
A30.9968
A40.9993
A51.0005
A60.9965
A70.993
A81.0002
A90.9988
A100.993
A10.9974
A21.0018
A31.0013
A41.0035
A50.9994
A60.9969
A71.0013
A80.9972
A91.0009
A101.0022
B10.9985
B20.9977
B30.9981
B40.995
B50.9997
B60.9942
B71.0031
B81
B90.9973
B101.0001
B11.0003
B20.9979
B31.0004
B40.9971
B50.9971
B60.9957
B70.9993
B80.9988
B90.9974
B100.9994
!(http://www.520cal.cn/home/attachment/200907/10/32443_1247208966nqmF.jpg)
!(http://www.520cal.cn/home/attachment/200907/10/32443_12472089747VXj.jpg)

3 条回复

lujian  2009-07-21 17:08
从你的图形看,A跟B的变异很大,重复性不太好


样品不能随机选择
选择的产品要覆盖你的产品误差的范围
即:3.0+/-0.2 那么选择的样品要事先先测量好,选取2.9-3.0选3个 3.0选4个 3.1-3.2选3个
再试试看
ypq_941  2009-07-10 14:51
** 2# _lujian_ **

我们现在在合格的产品中随机抽取10个产品,做出的GRR为52.32%

操作者部件号测量结果
A13.086
A23.0597
A33.0687
A43.0672
A53.0697
A63.0876
A73.0593
A83.0566
A93.0736
A103.0474
A13.0874
A23.0642
A33.0741
A43.0776
A53.0753
A63.0722
A73.0789
A83.0553
A93.0674
A103.0687
B13.0947
B23.0779
B33.0562
B43.0659
B53.0593
B63.0772
B73.0803
B83.0412
B93.0667
B103.0695
B13.0981
B23.0782
B33.0574
B43.0774
B53.0841
B63.0838
B73.0712
B83.0629
B93.0732
B103.0702

!(http://www.520cal.cn/home/attachment/200907/10/32443_1247208400oz7r.png)

!(http://www.520cal.cn/home/attachment/200907/10/32443_12472084154P05.png)
lujian  2009-07-10 13:03
样品的选择要覆盖整个公差带

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