Process of resistance welding of metal parts

B - Operations – Transporting – 23 – K

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B23K 11/11 (2006.01) B23K 11/30 (2006.01) B23K 11/31 (2006.01) B23K 20/12 (2006.01)

Patent

CA 2339843

The invention relates to a method for resistance welding metal parts. At least one welding electrode (4) is configured as a circular cylinder which is rotationally mounted about the axis thereof in order to improve welding quality. According to the invention, the cylindrical welding electrode (4) is rotated at least during the welding of the metal parts (1, 2). By producing gliding friction between the outer surface of the welding electrode (4) and the surface of the metal part lying thereon, said surface can become devoid of impurities. The inventive method is particularly suitable for welding sandblasted molybdenum foils with tungsten filaments.

L'invention concerne un procédé pour souder par résistance des pièces métalliques. Afin d'améliorer la qualité de la soudure, au moins une électrode de soudage (4) se présente sous la forme d'un élément cylindrique circulaire, monté de manière à pouvoir tourner autour de son axe. Selon l'invention, l'électrode de soudage cylindrique circulaire (4) est mise en rotation au moins pendant le soudage des pièces métalliques (1, 2) de sorte que la production d'une friction de glissement entre la surface d'enveloppe de l'électrode de soudage (4) et la surface, en contact avec cette dernière, de la pièce métallique (3), supprime les impuretés éventuellement présentes sur la surface de la pièce. Ce procédé est particulièrement adapté au soudage de feuilles de molybdène décapées au sable, comportant des filaments de tungstène.

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