Calibration of gages based on Wear pattern
December 17, 2010 at 7:43 am #53674
narayananParticipant@ganeshnarayanan Include @ganeshnarayanan in your post and this person will
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My name is Ganesh.
I have a specific requirement in which I want to do calibration based on wear pattern.
Already we are specifying gages based on the tolerance of the component for which it is used for measurement.
A type gages for 0.013 mm tolerance and frequency of calibration is once in 7 days.
B type gages for 0.014 to 0.050 mm tolerance and frequency of calibration is once in 14 days.
C type gages for 0.050 mm to 0.100 mm and frequency of calibration is once in 28 days.
All the other masters are calibrated once in 56 days.
I want a logic to be developed based on wear so that initially “A” type gage is getting calibrated as “A” type and after some time changes to “C” type and reverts back to “A” type when 85% of wear limit is reached and is getting scrapped after reaching 95%.
My problem is that when should I switch from “A’ type to “C”.
Need help in this regard.
N. Ganesh0December 17, 2010 at 2:30 pm #191057
MBBinWIParticipant@MBBinWI Include @MBBinWI in your post and this person will
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Ganesh: If you’re calibrating the gauge, that means that you’re bringing the reading for a specific value back to the correct value based on a highly refined master. If wear of the measuring surfaces is the only issue you’re dealing with, then I don’t see why you need to change the type of the gauge at all. The reason for the more frequent caliabrations is to again bring the gauge back to the correct reading and the time is based on the tolerance that the gauge is trying to resolve.
If the other components of the gauge system perform adequately and do not change, then you don’t need to change the type for the gauge, merely ensure that for the sensitivity that is being desired (tolerance) that it is brought back to a known and certified value within a frequency of use that takes into account the wear rate. It seems that this has already been developed.
However, if your wear rate really is so sensitive as to require recalibration every 7 days to bring back to a known value, then might you really be better off recalibrating after a specific number of uses? That would seem to be a more efficient means of ensureing adequacy of the measurement tools.0
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