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Grizz1345
I am looking for information on how to do GR&R on Flex Plugs. These are threaded plugs that we use to check the location of tapped holes using a CMM. I am interested in the X and Y dimensions. Any info would be appreciated.
Grizz1345 said:I am looking for information on how to do GR&R on Flex Plugs. These are threaded plugs that we use to check the location of tapped holes using a CMM. I am interested in the X and Y dimensions. Any info would be appreciated.
noboxwine said:Humm.... I have used a CMM for years in automotive and never done such a thing. But, nothing says you cant, especially if you see a benefit. I am assuming you are wanting to use the flex plugs, on different parts that contain the tapped holes to do the R & R. If that is the case then just pick a set of both X & Y dimensions on a part, measure 10 of those parts, 3 times, with 3 different operators--just pull the plugs after each part is measured and put them in the next one. Plug your data into a Gauge R & R program and look at the results. There is nothing different about this CMM measurement technique where an R & R is concerned. If you are unfamiliar with R & R as a whole, we'd all be glad to help. Let us know and have a day !
chalapathi said:Plug gages is an attribute inspection and you need to use the attribute MSA.
In the last message, you are talking about accuracy problem. Are you using standard ring gages for calibration of the Plug's.
Grizz1345 said:Thanks for your reply and input. The issue we are trying to address is the validity of the flex plugs. I believe that putting them in the same hole ten times will have a detrimental effect on the threads. We are talking aluminum heads versus harden steel flex plugs. We thought of making a hardened steel plate with the desired threaded holes in it. Production has been telling QC that the flex plugs are not accurate enough for inspecting these holes.
Have a great day.
Does anyone have any directions for calibrating flex-plugs? We are having some differences here with those that like them and those that don't. I think they may be helpful but need a way to be sure they are not damaged other than what you can see. Any ideas?
Thanks for your reply and input. The issue we are trying to address is the validity of the flex plugs. I believe that putting them in the same hole ten times will have a detrimental effect on the threads. We are talking aluminum heads versus harden steel flex plugs. We thought of making a hardened steel plate with the desired threaded holes in it. Production has been telling QC that the flex plugs are not accurate enough for inspecting these holes.
Have a great day.