Projection welding of an aluminum sheet

Details Projection welding of an aluminum sheet Projection welding of an aluminum sheet

B - Operations, Transporting

23

K

B23K 11/14 (2006.01) B23K 11/18 (2006.01) B23K 11/34 (2006.01)

Patent

CA 2377119

A projection coined onto a metal sheet (52), preferably an aluminum sheet, for projection welding the sheet to an adjacent metal sheet. The projection has a thickness greater than the thickness of the sheet on which it is formed. The wall (55) of the projection surrounds a first recess (1) and a second recess (63) is formed in a side of the sheet opposite the projection from which the metal cold flows to form the projection. A welding gun assembly having an improved low interia, fast response to the collapse of the projection welding the sheet having the projection to the adjacent sheet.

L'invention concerne un bossage formé sur une feuille de métal, de préférence une feuille d'aluminium, pour le soudage à bossages de la feuille à une feuille de métal adjacente. Le bossage possède une épaisseur plus grande que l'épaisseur de la feuille sur laquelle il est formé. La paroi du bossage entoure un premier renfoncement, et un second renfoncement est formé sur un côté de la feuille opposé au bossage, d'où s'écoule le métal à froid pour former le bossage. L'invention concerne également un ensemble pistolet de soudage perfectionné à faible inertie et à réponse rapide à l'effondrement du bossage, soudant la feuille pourvue du bossage à la feuille adjacente.

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