S
Sean Kelley
We have had our first succesful gage R&R study using micrometers, calipers, tapes and profileometers. We are a steel mill planning to supply automotive and ar pursuing TS 16949 with a goal of this Dec. for full implementation. Micrometers have 1.6% error mostly due to instrument error with tapes and calipers being similar
We have run into one possible issue with our gage r&r study and that is our profileometers which measure surface roughnes of steel are over the 10 % acceptable criteria according to AIAG MSA manual page 77. They do state that between 10-30% may be acceptable based upon importance of application, cost of measurement device, cost of repair, etc. We are a stainless steel mill with the intent of supplying our steel mainly for exhaust systems. There may be other applications that I am not sure of yet. Possibly engine components like I know Ford has used our steel for Mustang wheel covers, fuel injectors and fuel filters. There are likely others that I do not know about. We also produce long products such as round rod, a possibility for shafts on water pumps, altenators, etc.
My question is we have 11.67% error with our profileometers which measure surface roughness (or smoothness) depending on how you look at it. Generally it is used on out polished finish which is used for kitchen sinks, stove tops, etc. The profileometer study showed most of the error being instrument error with around 1% operator error. Can we justify using these devices. We may not even sell polished material to automotive. Thanks to all for your help.
We have run into one possible issue with our gage r&r study and that is our profileometers which measure surface roughnes of steel are over the 10 % acceptable criteria according to AIAG MSA manual page 77. They do state that between 10-30% may be acceptable based upon importance of application, cost of measurement device, cost of repair, etc. We are a stainless steel mill with the intent of supplying our steel mainly for exhaust systems. There may be other applications that I am not sure of yet. Possibly engine components like I know Ford has used our steel for Mustang wheel covers, fuel injectors and fuel filters. There are likely others that I do not know about. We also produce long products such as round rod, a possibility for shafts on water pumps, altenators, etc.
My question is we have 11.67% error with our profileometers which measure surface roughness (or smoothness) depending on how you look at it. Generally it is used on out polished finish which is used for kitchen sinks, stove tops, etc. The profileometer study showed most of the error being instrument error with around 1% operator error. Can we justify using these devices. We may not even sell polished material to automotive. Thanks to all for your help.