Spot-Weld Bonding Steel Components Rep-Alg-RAGRP41-4105701 - V.4

Attention! 

Comply with the following topics from "Body, General":

Safety regulations. Refer to SAFETY AT WORK REP-ALG-RAGRP41-4102100 - V.6 .

Handling electrical system, electronics, airbags and restraint systems. Refer to HANDLING AIRBAGS AND RESTRAINT SYSTEMS REP-ALG-RAGRP41-4104200 - V.2 .

WELDING STEEL COMPONENTS .

• The spot weld E65 bonding process is used to increase vehicle rigidity. In some areas of the body, a 1-component adhesive is applied to the point flanges and then resistance pressure point welded. The adhesive is hardened only after the paint drying process (at approx. 180°C).
• In the event of a repair, no  adhesive is applied to the spot flanges. To replace the missing adhesive, the number of spot welds doubles  .
• Minimum distance between welding spots (1) is 25 mm. Attention! The minimum distance must not be undershot! If there is not enough space for twice the number of resistance welds, each unmade resistance weld must be replaced with a MAG weld seam (2). Length of a MAG weld seam = 20 mm. Apply MAG weld seams at equal intervals on the face side.

  Courtesy of BMW OF NORTH AMERICA, INC.

• The following processes are used as a substitute for spot weld gluing:
  • MAG welding (MAG welding  )
  • Resistance pressure spot welding (referred to in the following and in the repair instructions as spot-welding).
• Adhesive is not applied between the spot flanges on new parts in the case of 2- or multi-sheet joints. Join areas that are inaccessible to the spot welding tongs using MAG plug welds. The number of spot welds is doubled to replace the missing adhesive.
• Exceptions  (e.g. E65) are described in the respective repair instructions. Place welding points on the existing welding points on the new part. This is necessary because the adhesive between the spot flanges of the new part acts as an insulator.
• CAUTION: Extract smoke and fumes during welding work.