| 摘要 |
<p>There is decribed a method for welding thin metal sheets (A, B) by the localised heating of limited juxtaposed zones of the metal sheets to be welded to cause their fusion and to form spot welds (S). in each weld zone, the metal sheets (A, B) are heated and fused along a closed line so that each weld spot (S) has a substantially annular configuration in cross section in a plane parallel to the metal sheets.</p><p>This welding may be achieved for example with the use of a laser (2) produced by a laser source (1), or by electrical resistance welding with a pair of opposed electrodes (6, 7) the ends whereof which are intended to grip the metal sheets (A, B) are suitably shaped.</p> |
