Bending force and springback characteristics of the tailor-welded 18G2A-E355 steel strips

In many studies a wide range of information about the bendability, failure patterns and the springback of homogeneous as well as tailor-welded sheet metal parts are presented. However, accurate prediction of the springback remains elusive, especially in the case of thick sheet metal. The purpose of this study was experimental determination of the bending force and springback coefficient of the tailor-welded 18G2A-E355 steel strips. Especially, it was focused on comparing the differences in the mechanical properties and bending characteristics between the tailor-welded strips and non-welded ones under the same experimental conditions. The set-up mounted on the testing machine, instrumentation and process control system allows the rig to operate in displacement as well as load control. The MAG method with the Argon + CO₂ atmosphere was used for strips welding.

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