PSI - Issue 77

3

Andreas Fezer et al. / Procedia Structural Integrity 77 (2026) 229–236 Andreas Fezer / Structural Integrity Procedia 00 (2026) 000–000

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The welding tests were conducted with this aluminum alloy. For this purpose, aluminum sheets measuring 500 mm x 88 mm were used. Some welds were performed with adhesive, some without. When BETAMATE™ 1640 adhesive from DuPont was used, two lines were applied to the lower aluminum sheet (see Figure 1). The upper sheet was then placed on the lower sheet and lightly pressed down by hand. Two rows of 15 spot welds each were then welded and subsequently destroyed with a peel test according to DVS 2916-1 (DVS – Deutscher Verband für Schweißen und verwandte Verfahren e.V. 2014) in order to be able to measure the weld spots of the lower sheet with a caliper. The process described is illustrated graphically in Figure 1.

Figure 1. Process steps of the sheets before to after welding

The BOSCH Rexroth 7000 welding controller and a C-gun from Nimak were used for the welds. The gun was mounted on a Kuka robot (see Figure 2).

Figure 2. KUKA-robot with C-gun from Nimak