N. D. THREAD INSPECTION
THREAD INSPECTION BY EDDY CURRENT
The eddy current for thread inspection is a known and consolidated technology for 100% process verification.
Threaded parts require the following verifications:
- Thread presence: it is just a verification that tapping operation has been performed and detect parts without thread.
- Thread quality: it is intended to detect if a thread has been damaged during the thread process or part manipulation.
example of parts with and without thread
example of damaged thread during the thread process or part manipulation
Thread presence is tested at the bottom of the diameter. In that section thread depth and broken taps can also be verified:
THREAD PRESENCE INSPECTION
For thread quality inspection the part (or the e.c. probe) will be put in rotation for the complete scanning of the surface.
THREAD QUALITY INSPECTION
Example of a damaged thread. The part will be put in rotation and tested with a scanning probe: