Resistance Spot-Welding Combined With Adhesive Bonding And Mechanical Jointing Processes

In the case of spot weld bonding for repair and series production, the entire extent of adhesive surfaces and spot welds is replaced. In this case, before actually spot weld bonding, the unhardened adhesive must be displaced from the joint area by an appropriate squeeze time. In the case of two-component adhesives, the hardening reaction starts immediately after mixing and application; this increases the viscosity and so there is only a certain time window in which spot weld bonding can be performed if the process is to be reliable. For this reason, all time-intensive preliminary work (drilling, cutting to size, fixing etc.) on the parts to be joined must be performed before application of adhesive and jointing. This also applies to mechanical jointing processes where the adhesive has to be displaced from the joint area.