Sequence of Operations - Non-Destructive Testing vs. Trim & Drill

E

Eloy Gomez

#1
Is it best practice to perform all trim and drill operations before any non-destructive testing or a requirement? How about performing NDI then trim and drill?
We are a manufacturer of aerospace composite parts and assemblies. Thanks much in advance for your comments.
 
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JAltmann

Quite Involved in Discussions
#2
It really depends on your manufacturing process and the requirements. Some parts if i won't be able to rework or repair (with appropriate MRB) after finial machining i do an additional before. If i am comfortable without doing before then i will do afterwards.
 
T

tonefordays

#3
Is it best practice to perform all trim and drill operations before any non-destructive testing or a requirement? How about performing NDI then trim and drill?
We are a manufacturer of aerospace composite parts and assemblies. Thanks much in advance for your comments.

Generally speaking NDT should be performed after all machining process. If there is a potential for the trim and drill operation to create a non-conformity that the NDT will pick up, than it might be better to complete the T&D first. If it will have no impact on the final acceptance in regard to the NDT, is shouldn't matter so much.
 
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