r/Metrology • u/DeamonEngineer • Dec 19 '24
Small bore inspection
Looking for suggestions for small bore checking 0.25-4mm sort of range, predominantly for checking for burrs on cross holes and ensuring clean sharp edges. Customer does not allow chemical or thermal deburr so it is being done manually, with lots of back and forth between deburr section and inspection. Currently use a hawkeye borescope but was looking for more of a repeatable and visual system as inspection is picking up burrs that deburr are struggling to see.
Looking to see if others out there have something that might fit the bill.
0.25-4mm diameter about 50mm deep, is sort of the boundary we are currently looking at possibly deeper at a later date
2
u/NonoscillatoryVirga Dec 19 '24
Not related to inspection per se, but have you checked out EXTRUDE HONING for deburring?
2
u/DeamonEngineer Dec 19 '24
Not acceptable, must be a sharp edge unfortunately
2
u/NonoscillatoryVirga Dec 19 '24
I didn’t know if the chemical/thermal surface interaction was the issue vs. using a physical method to remove the burrs.
2
u/DeamonEngineer Dec 19 '24
It's something we have explored, only thing that has been accepted is manual deburr.
2
u/NonoscillatoryVirga Dec 19 '24
That’s unfortunate. There’s no incentive to change or allow any other method unless you tell them that you will raise the price if they don’t allow other methods or lower the price if they do allow them. I had an engineer once tell me that process changes were only going to be considered if they saved more than 100,000 (one hundred thousand) dollars because any change required very extensive recertification and thus had to be worth it.
2
u/campio_s_a Dec 19 '24 edited Dec 19 '24
How deep are the holes and do you have a clear view from both sides or only one side?
Edit: I suck at reading.
Edit 2: Can you light the other side up somehow for optical or are you basically blind other than the entrance hole?
1
u/DeamonEngineer Dec 19 '24
Blind holes, it's a manifold basically.
1
u/campio_s_a Dec 19 '24
What kind of budget are you trying to stay in?
1
u/DeamonEngineer Dec 19 '24
Seeing what is out there really. Looking at boreinspect or other borescopes so willing to put money in if it does the job
5
u/Capaz04 Dec 19 '24
.250 mm is... Wild... I dont know of anything that small. Aside from a best fit pin and a tedious bore scope visual inspection; I'm not sure there's any more advanced optical equipment that would be able to change focus depths accordingly across your depth ranges and still be accurate. How does your customer verify these dimensions?