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Friction Stir Welding
Friction stir welding is another process that aids the performance of extruded profiles. The innovative friction stir welding results in a total freedom of design in case of friction stir welding. After the friction stir welding is carried out the surface of the resulting profiles are smooth, and the high point is that there is no requirement of further grinding or brushing for improving the finish. The following image is of a heat sink panel, that is formed by the friction stir welding of aluminum profiles into the form of tray.
Extruded Aluminium Heat Skin

Extrusions are joined using the process of friction stir welding. The side panels of Extruded aluminium used in train cars are produced this way. The working of the friction stir welding process is described here.

The process of Friction stir welding process gets carried out by moving of one component relative to the other via an interface that is common. A compressive force is applied across the joint. The amount of friction heating that gets generated at the interface is able to soften up both the components. As they become plasticised, the interface material is gradually extruded out of the edges of the joint. The clean material from each of the component is subsequently left along the original interface.

Finally there is stopping of the relative motion. The joint is then cooled, before that an optional higher final compressive force can be applied.

Friction Stir Welding


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