Investigation of new welding technology for aluminium
The Belgian welding Institute has started a research project about a new spot weld technique; friction spot welding. The connection is created by using friction. This welding technology is particularly suitable for welding aluminium, and provides a solution to the difficulties that resistance spot welding is facing when joining aluminium, such as the electrode wear and tool life.
Metal-composite sandwich panels consist of two thin solid metal plates with in between a synthetic material (e.g. polyethylene), glued under high pressure. The metal plates, together with the plastic core, form a kind of sandwich plate. Different types of metals are used; mainly aluminium, but also stainless steel, coated steel, brass, titanium etc.
The surface of aluminium sandwich plates is extremely flat, corrosion-free and has a low coefficient of expansion. The stiff aluminium sandwich plates combine these properties with excellent ink printing. This makes them ideally suited for stylish applications, such as advertising pillars, stand construction, advertising boards and displays.
The INNOJOIN project provides insight in new modern welding technologies for welding of dissimilar sheet metals and helps companies to identify the most suitable welding technology for their products. During the project, a few representative cases were developed, based on the input of the participating companies.
SOUNDWELD will investigate a new promising real-time non-destructive examination technique for welding processes, based on acoustic emission during the weld cycle. The acoustic emission technique is based on the detection and conversion of high-frequency elastic waves into electrical signals. Acoustic emission monitoring (AEM) is currently being used for the surveillance of industrial processes or structures. In this project, the application of this technology will be expanded towards welding processes.