| 摘要 |
<p>Butt welding comprises cutting ends (23) to provide two rectilinear and parallel edges, each spaced away from the corresponding end of the jaws by a overhang distance, contacting the cut edges by relative displacement of a clamping mechanism, and spacing both cut edges apart after cutting by a reference distance. Butt welding by a laser beam or equivalent and without using filler material, of two bands running successively along a longitudinal direction, in a continuous line processing installation, where, in the running direction, a downstream end of a first band and an upstream end of a second band are held respectively by two double-jaw clamping mechanism and welded by passing the laser beam and without using filler material, comprises cutting ends to provide two rectilinear and parallel edges, each spaced away from the corresponding end of the jaws by a overhang distance, then contacting the cut edges by relative displacement of the clamping mechanism towards one another and passing the laser beam along a contact plane between the edges making the welding bead, spacing both cut edges apart after cutting by a reference distance, controlling bringing the clamping mechanism towards one another over a travel distance which differs from the reference distance by a preset play, calculated beforehand in relation to the thickness of the bands to be welded and while taking into account the degree of accuracy of the positioning and of the cut of the edges, the preset play being counted as positive or negative in order to be subtracted or added to the reference distance for determining the bringing-closer travel distance, in order to obtain a final welding position such that it exists, between the edges of both bands, an actual allowance having the same sign, positive or negative, as the preset play.</p> |
