Patent ID: 7490391

Claim:
A bead trimmer for use in a production line of elements bearing longitudinal weld beads ( 21 ) in which one of the elements slides along a direction which is parallel to a longitudinal axis (x) thereof, wherein the bead trimmer comprises a tool-bearing member ( 2 ) for removably fixing a bead-trimmer tool ( 30 ), which member ( 2 ) is supported by means for translating the member ( 2 ) on command according to at least one vertical direction (z) and at least one horizontal direction (y) which at least one horizontal direction (y) is transverse with respect to the longitudinal axis (x) between an internal working position and an external tool-changing position, with a run which is sufficient to extract the member ( 2 ) from a working zone thereof; wherein the means for translating comprise a first slide ( 3 ) to which the tool-bearing member ( 2 ) is associated, the first slide ( 3 ) being slidable along the at least one horizontal direction (y) between the internal working position, in which the tool ( 30 ) is aligned with the weld bead ( 21 ), and the external tool-changing position, in which the tool ( 30 ) is not aligned with the weld bead ( 21 ); the first slide being associated to an intermediate slide ( 34 ) and being configured so as to be slidable in the at least one horizontal direction (y) relative to the intermediate slide ( 34 ), which intermediate slide ( 34 ) is associated to a second slide ( 4 ) which is vertically slidable on a bearing structure ( 40 ) along the at least one vertical direction (z) between a lower position, in which the tool ( 30 ) is in contact with the weld bead ( 21 ), and a raised position, in which the tool ( 30 ) is distanced from the weld bead ( 21 ); wherein the intermediate slide ( 34 ) is mobile, via a calibration mechanism, along the at least one horizontal direction (y) with respect to the second slide ( 4 ) in order to enable a centering of the tool ( 30 ) with respect to the weld bead ( 21 ).