aluminium in commercial vehicles - European Aluminium Association
aluminium in commercial vehicles - European Aluminium Association
aluminium in commercial vehicles - European Aluminium Association
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EUROPEAN ALUMINIUM ASSOCIATION ALUMINIUM IN COMMERCIAL VEHICLES CHAPTER VIII 121<br />
The limitations of the FSW process<br />
are cont<strong>in</strong>uously reduced by <strong>in</strong>tensive<br />
research and development.<br />
However, the ma<strong>in</strong> limitations of<br />
the FSW process are at present:<br />
• The relatively high <strong>in</strong>vestment<br />
requires a high degree of<br />
repeatability <strong>in</strong> order to materialize<br />
the cost sav<strong>in</strong>g potential<br />
• Work pieces must be rigidly<br />
clamped.<br />
• Back<strong>in</strong>g bar required (except<br />
where self-react<strong>in</strong>g tool or directly<br />
opposed tools are used).<br />
• Keyhole at the end of each<br />
weld.<br />
• Cannot make jo<strong>in</strong>ts which<br />
require metal deposition (e.g. fillet<br />
welds).<br />
Friction stir welded taillift profiles<br />
Up to now the dimensionally biggest<br />
equipment can cope with work<br />
pieces up to 20 m long.
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