iweihai 发表于 2021-12-6 14:38:15

各位老师帮忙解决一下:NDC怎么调整大于5


APPRAISER/PARTAVERAGE Measurement Unit Analysis   % Total Variation (TV)
TRIAL #12345678910Repeatability - Equipment Variation (EV)    
1.A15.1655.1665.1655.1675.1665.1655.1665.1675.1665.165 5.166EV=RxK1TrialsK1% EV=100 (EV/TV)
2.25.1665.1655.1675.1665.1655.1665.1675.1655.1675.166 5.166=0.002 x 0.590820.8862=100(0.001/0.001)
3.35.1655.1675.1655.1665.1675.1655.1655.1665.1655.166 5.166=0.001  30.5908=98.77 
4.AVE5.1655.1665.1665.1665.1665.1655.1665.1665.1665.166xa=5.166Reproducibility - Appraiser Variation (AV)   
5.R0.0010.0020.0020.0010.0020.0010.0020.0020.0020.001ra=0.002AV={(xDIFF x K2)2 - (EV2/nr)}1/2 % AV=100 (AV/TV)
6.B15.1665.1675.1675.1665.1675.1665.1655.1665.1655.166 5.166={(0.00 x 0.5231)^2 - (0.00 ^2/(10 x 3))}^1/2=100(0.000/0.001)
7.25.1655.1665.1675.1665.1685.1655.1655.1675.1645.165 5.166=0.000 =4.59 
8.35.1675.1665.1655.1675.1655.1665.1675.1665.1665.167 5.166Appraisers23  
9.AVE5.1665.1665.1665.1665.1675.1665.1665.1665.1655.166xb=5.166         n = parts      r = trialsK20.70710.5231  
10.R0.0020.0010.0020.0010.0030.0010.0020.0010.0020.002rb=0.002Repeatability & Reproducibility (GRR)  % GRR=100 (GRR/TV)
11.C15.1665.1665.1655.1665.1655.1675.1665.1655.1655.166 5.166GRR={(EV2 + AV2)}1/2PartsK3=100(0.001/0.001)
12.25.1655.1655.1665.1655.1655.1665.1655.1665.1675.166 5.166={(0.001^2 + 0.000^2)}^1/220.7071=98.88 
13.35.1665.1665.1675.1655.1665.1655.1675.1665.1655.165 5.166=0.001  30.5231Gage system needs improvement
14.AVE5.1665.1665.1665.1655.1655.1665.1665.1665.1665.166xc=5.166Part Variation (PV)  40.4467  
15.R0.0010.0010.0020.0010.0010.0020.0020.0010.0020.001rc=0.001PV=RP x K350.4030% PV=100 (PV/TV)
16. PART          X=5.166=0.000 x 0.314660.3742=100(0.000/0.001)
AVERAGE5.1665.1665.1665.1665.1665.1665.1665.1665.1665.166Rp=0.000=0.000  70.3534=14.92 
17.(ra + rb + rc) / (# OF APPRAISERS) =     R=0.002Total Variation (TV)  80.3375  
18.xDIFF = (Max x - Min x) =       xDIFF=0.000TV={(GRR2 + PV2)}1/290.3249ndc=1.41(PV/GRR)
19.* UCLR = R x D4 =          UCLR=0.004={(0.001^2 + 0.000^2)}^1/2100.3146=1.41(0.000/0.001)
              =0.001 =0 
* D4 =3.27 for 2 trials and 2.58 for 3 trials.UCLR represents the limit of individual R's.Circle those that are      Gage discrimination low
beyond this limit.Identify the cause and correct.Repeat these readings using the same appraiser and unit as originally used or 
discard values and re-average and recompute R and the limiting value from the remaining observations. For information on the theory and constants used in the form see MSA Reference Manual, Fourth edition.

samisok 发表于 2021-12-6 16:04:19

调整取样范围,包含公差带的上中下限取样

tfan 发表于 2021-12-7 08:00:29

samisok 发表于 2021-12-6 16:04
调整取样范围,包含公差带的上中下限取样

{:1_180:}

zhangbolun 发表于 2021-12-7 08:23:54

{:1_180:}{:1_180:}

flyerchang 发表于 2021-12-7 12:39:55

你重复数太多了

532128wang 发表于 2025-3-7 11:10:12

调整测试值的上下限,减少产品变差

kzt1986 发表于 2025-3-7 16:17:47

建议先了解NDC的含义,NDC大于5代表什么意思,有什么作用

393690473 发表于 2025-9-12 12:31:59

kzt1986 发表于 2025-3-7 16:17
建议先了解NDC的含义,NDC大于5代表什么意思,有什么作用

DC大于5代表什么意思,有什么作用,我也想知道,赐教一下

kzt1986 发表于 2025-9-12 16:18:01

393690473 发表于 2025-9-12 12:31
DC大于5代表什么意思,有什么作用,我也想知道,赐教一下

代表数据分层,层级太少体现不出测量系统的区分度

神仙命长 发表于 2025-9-12 17:49:48

NDC <5,代表现有的量具相对于现有过程能力分辨率不足,现在的测量系统不能评价现在的生产过程能力。你这个要么过程太过稳定需要换更精确量具,要么就是取样有问题,样品没有覆盖整个过程的变差。
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