Floating bobbin friction stir welding

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A variant of friction stir welding has been successfully tested at TWI which could enable FSW to be performed using traditional unmodified machine tools.
It uses a bobbin shaped tool and penetrates the material to be joined from the edge.
The technique is ideal for joining low temperature softening materials such as aluminium. Already successful welds have been achieved on sheet between 2.5mm and 25mm thickness.
The process lends itself to joining closed sections where conventional use of a well supported backing bar is difficult or impossible.

[@YoucaNShine]

Thanks for the video sir.

[@francorodriguez0403]

How do you determine de parameters (rpm and welding speed) for FSW?. I´m making a project on FSW but after welding i do radiographic examination and there is many lack of fusion, maybe due to an excess in the welding speed. Please give me your comments. Thanks