| 摘要 |
The overlapping ends of at least three sheets W1a, W2a, W3a are laser welded by positioning and holding the sheets with a holding mechanism 212, and applying at least two laser beams L1a, L2a to the at least two interfaces 214, 216 between the sheets substantially simultaneously. The amount of heat applied by each laser beam, and the position of each laser beam, may be controlled and changed according to the material and/or thickness of the sheets to be welded. Also described is an arrangement for welding two overlapping sheets by heating the sheets with a first laser beam, without causing melting of the sheets, to deform and space the sheets a predetermined distance apart, and then welding the sheets using a second laser beam. |
