Non-destructive testing method and apparatus for spot welds

Details Non-destructive testing method and apparatus for spot welds Non-destructive testing method and apparatus for spot welds

G - Physics

01

N

324/43, 73/83

G01N 27/02 (2006.01) G01N 3/00 (2006.01) G01N 27/20 (2006.01)

Patent

CA 1161114

ABSTRACT OF THE DISCLOSURE The testing method comprises subjecting the welds to a mechanical test using a pneumatic hammer and during the test the so-called "stuck" welds are destroyed. The remaining welds then undergo a punctiform inspection, using a rheometric method. This method consists of creating a potential difference between the supply electrodes, of which there are even numbers in contact with the weld. Measuring electrodes located in the vicinity of the supply electrodes make it possible to obtain a resulting quantity of the different voltages measured. After calibrating the resulting value of the voltages makes it possible to deduce therefrom the diameter of the weld and consequently its efficiency.

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