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.

 

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Thread presence is tested at the bottom of the diameter. In that section thread depth and broken taps can also be verified:
Multichannels thread presence inspection:
New E70T electronic for thread presence inspection (max 4-channel inspection):
Example of standard probes:

For thread quality inspection the part (or the e.c. probe) will be put in rotation for the complete scanning of the surface.
Example of a damaged thread. The part will be put in rotation and tested with a scanning probe:
Threaded hole with surface porosity. A rotary probe will test the thread integrity inside the hole:
In both cases the electronic solution will be the E59N configured for the material integrity inspection::

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