Patent ID: 7607558

Claim:
Friction stir welding device ( 1 ) for mounting on a handling device, with a tool drive ( 2 ), with a mounting element ( 16 ) for connection to the handling device, with a friction stir welding tool ( 8 ), which is driven by the tool drive ( 2 ) in a rotating manner about an axis of rotation ( 10 ), with a counterbearing roller ( 30 ) having a circumferential surface ( 32 ) and with a counterbearing drive ( 22 ), the counterbearing drive ( 22 ) driving the counterbearing roller ( 30 ) in a rotating manner about a counterbearing axis ( 28 ) and the circumferential surface ( 32 ) of the counterbearing roller ( 30 ) being arranged opposite the friction stir welding tool ( 8 ), wherein the distance between the friction stir welding tool ( 8 ) and the counterbearing roller ( 30 ) is variable and the counterbearing drive ( 22 ) is held on the tool drive ( 2 ) by means of a linear drive ( 20 ).