A method is required which can be used, after damage has occurred to diesel engines on ships or locomotives, for exami-nation, or preventative nondestructive testing of valves in the assembled condition, after the control mechanism has been removed.
This means that only the front of the valve shaft is accessible.
It is proposed that the special probe K5KS1 be used in the direct coupling mode on the front of the valve shaft:
The probe’s crystal element diameter is matched to the shaft’s diameter. The acoustically absorbent protection layer (coupling membrane) reduces coupling deviations caused by standard hard-faced probes.
Indications from the weld zone are evaluated which extend above the noise level caused by coarse grain structure for-mation.
The complete weld area is covered by guiding the sound beam into the valve shafts.
Typical display indications:
It is recommended that the test method be used due to its easy application and its clear indications in engine production and for input checks.
SUITABLE EQUIPMENT: 設備
Ultrasonic Flaw Detector:
超聲設備 USD 15X USM 22 USM 25