SHEET METAL LASER-WELDING METHOD, WHEREIN ONE OF THE METAL SHEETS IS PROVIDED WITH BOSSES SUCH AS TO CREATE CLEARANCE FOR DEGASSING

摘要

The present application relates to a method for welding metal sheets (3, 4) by means of a laser beam, at least one of the metal sheets (3, 4) being provided with bosses (5) forming a thickened portion (H) on the thus-embossed metal sheet (4). Said method includes an operation for assembling the metal sheets (3, 4), an operation for holding the metal sheets (3, 4) for degassing with a predetermined clearance (J) therebetween, and an operation for welding the thus-held metal sheets (3, 4). In said method, the clearance (J) for degassing is less than the thickened portion (H) formed by the bosses (5). The operation for holding the metal sheets (3, 4) includes an operation for crushing the bosses (5) until the thickened portion (H) is made level with the clearance (J) for degassing.