Joining by forming – A selective review

Abstract

Current joining technologies have to fulfil multiple requirements. Firstly, the demand of mass reduction is causing a progressive hybridization, requiring the joining of dissimilar materials. Additionally, load-adapted structures lead to a variety of different workpiece geometries. Finally, the integration of functions, like the requirement of joints to be electroconductive or resistant to corrosion, are some of many requirements. Joining by forming processes can fulfil these diverse requirements. This paper aims to provide an overview into joining processes that are based on the principle of plastic deformation, contributed by the Institute of Forming Technology and Lightweight Components in Dortmund, Germany. For various classes of initial workpiece geometries, the process parameters influencing the joint strength, as well as the existing joining mechanisms, are presented by allocating experimental, numerical, and analytical research results.