The model of aluminium deformation cold-welded on cogged surfaces

Résumé

Cold-welding on cogged surfaces can be performed by pressing a piece of aluminium on a cogged surface of a component made up of a more rigid, hardly mouldable material. There have been made welded joints between aluminium (the soft, easily mouldable component) and copper, brass, carbon steel, stainless steel (the rigid component, cogged). Welding has been performed by deforming only the aluminium component with a rate of deformation of 20…30%. The finite element modelling of the system aluminium-brass has allowed to analyse the stress and local strains distribution in the welded joint. Thus, the correct technological parameters have been established in order to avoid problems such as cracks or insufficient joints/ weak joints.