Device for butt laser welding of metal sheets (tailored blanks), having magnetic rollers for moving the sheets to the welding position and magnetically active clamps for clamping the sheets

摘要

A device for butt laser welding of metal sheets is described which comprises a locating template (29) for precisely positioning the metal sheets, which is movable between a lowered inoperative position and a raised operative position in a plane parallel and spaced apart from the welding plane of the laser head. The metal sheets are carried by supporting boards (13, 14) which are movable each on a fixed structure between a rearwardly displaced position and an advanced position. Each supporting board (13, 14) is provided with at least one powered shaft (23) having magnetic rollers or wheels (24) for causing the respective metal sheet (A, B) to advance towards the position in which it is then clamped. This clamping operation is carried out by means of magnetically operable clamping means comprising an upper clamping cross member (37) which can be positioned also at a short distance from the metal sheet in order to limit vertical movement of the sheet during sliding thereof towards the position in which the metal sheet is then clamped.