Method and apparatus for inspecting joined object formed by...

G - Physics – 01 – N

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G01N 29/04 (2006.01) B23K 20/12 (2006.01) G01N 19/04 (2006.01) G01N 29/44 (2006.01)

Patent

CA 2651536

A method for inspecting the joint strength and region of an object formed by spot friction stir joining. An ultrasonic wave is made to enter into the object from a backing surface (25) on the opposite side of a joining tool immersion plane (24), and an ultrasonic wave reflected from the object (20) is taken in. A joint region (21) and joint strength are estimated without using an ultrasonic wave reflected from the bonding tool immersion plane but with the use of an ultrasonic wave reflected from the vicinity of Z position in the reference direction, which z position corresponds to the boundary surface (27) between the two joined members, and then the object is inspected based on the estimation results. Consequently, irregularities of a trace (29) of the joint formed on the joining tool immersion plane (24) is prevented, and joint quality can be inspected by estimating the bonding region (21) with the use of an ultrasonic and without breaking the objects (20).

L'invention concerne un procédé d'inspection de la résistance d'un joint et de la région d'un objet formée par soudage ponctuel par friction-agitation. Une onde ultrasonore pénètre dans l'objet à partir d'une surface d'appui (25) du côté opposé du plan d'immersion d'une machine à souder (24) et l'onde ultrasonore réfléchie par l'objet (20) est recueillie. La région de jonction (21) et la résistance du joint sont estimées sans utiliser l'onde ultrasonore réfléchie par le plan d'immersion de la machine à souder, mais en se basant sur l'onde ultrasonore réfléchie depuis le voisinage d'une position Z dans la direction de référence, la position z correspondant à la surface limite (27) entre les deux éléments attachés, puis l'objet est inspecté sur la base des résultats de l'estimation. Par conséquent, les irrégularités d'une trace (29) du joint formé sur le plan d'immersion de la machine à souder (24) sont supprimées et la qualité du joint peut être inspectée en estimant la région de liaison (21) à l'aide d'ultrasons et sans casser l'objet (20).

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