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2. Principle
The principle of Friction Stir Welding (FSW), which for simplicity will be referred to here as FSW, is shown in figure 1 .
It uses a rotating mandrel to receive the actual welding tool, which takes the form of a cylinder of revolution made of high-strength steel, with a shoulder (shoulder ) extended by a coaxial active rod or tip (pin ), itself cylindrical or frustoconical, and featuring various types of surface relief.
The welding head thus formed is fixed to a support which presents the tool in rotation on the joint of the two metal sheets to be welded, themselves fixed to a support assembly, and then brings it into contact with them. The heat generated by the friction brings the surrounding material into a pasty state (figure
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Principle
Features
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Organizations
Most of the data concerning the process can be found at the British Welding Institute, TWI, and the French Welding Institute, IS.
The process is currently the subject of numerous research and development programs financed by companies and institutes, some of which are French (aeronautics, railways, etc.). They cover all aspects of the process: scientific, technological, economic and practical. All...
Websites
The following websites may also be consulted:
http://www.twi.co.uk of the TWI Institute (Great Britain).
http://www.eurostir.co.uk on the EUROSTIR program, part of the EUREKA framework on the process. The Eurostir...
Machine builders
(non-exhaustive list)
The main manufacturers of friction stir welding machines are listed below.
Figures 1 ,
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