METHOD TO CONTROL QUALITY OF NON-DETACHABLE JOINTS Russian patent published in 2014 - IPC G01N27/90 G01N25/72 

FIELD: testing equipment.

SUBSTANCE: invention relates to the field of nondestructive check and may be used in diagnostics of non-detachable joints, in particular, for control of quality of soldered joints in combustion chambers and nozzles of liquid-propellant rocket engines. The method to control quality of non-detachable joints consists in the fact that initially at the minimum distance from the non-defect area of a non-detachable joint they place a heating device and a vortex-current converter. Heating is switched on, and they record readings of the vortex-current converter. Then they shift the heating device and the vortex-current converter to a controlled section of a non-detachable joint. Positions of the heating device and the vortex-current converter relative to the soldered joint must be identical to their positions relative to the non-defect area. Heating is switched on, and they record readings of the vortex-current converter. Afterwards they compare readings of the vortex-current converter produced on a non-defect area and on a controlled area, and by difference of the indices they decide on quality of the non-detachable joint.

EFFECT: increased accuracy of diagnostics of quality of soldered joints of products.

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