Apparatus and method for forming a weld joint having...

B - Operations – Transporting – 23 – K

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B23K 31/02 (2006.01) B23K 28/02 (2006.01) B23K 31/12 (2006.01) B24B 39/00 (2006.01)

Patent

CA 2480322

The method and apparatus for performing the method of forming a weld joint of the present invention utilizes welding apparatus (100) having welded tool (102) and a compression tool (106) for inducing a layer of residual compressive stress along the surface of the weld line (18) and any heat affected regions with a controlled amount of cold working and surface hardening. In a preferred embodiment of the invention the compression tool (106) utilizes a single-point burnishing process to provide deep compression within the weld joint (20) with a minimal amount of cold working and surface hardening.

La présente invention concerne un procédé et un appareil permettant la mise en oeuvre du procédé de formation de soudure de cette invention. Ce procédé utilise un appareil de soudage (100) possédant un outil de soudage (102) et un outil de compression (106) permettant d'induire une couche de contrainte de compression résiduelle le long de la surface de la ligne de soudure (18) et d'appliquer à toutes régions thermomarquées une quantité commandée de travail à froid et de trempe superficielle. Dans un mode préféré de réalisation de l'invention, l'outil de compression (106) utilise un processus de brunissage en un point de façon à obtenir une compression en profondeur à l'intérieur de la soudure (20) avec une quantité minimale de travail à froid et de trempe superficielle.

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