B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/08 (2006.01) B23K 26/06 (2006.01) B23K 26/24 (2006.01)
Patent
CA 2201309
Metal alloy workpieces (12, 14) are laser welded to one another with a laser head (16) emitting a laser beam (18) and a servo motor (34) is attached to a linkage (36) that imparts oscillatory motion to laser head (16). In operation, the laser head (16) and workpieces (12, 14) are moved relative to one another at a predetermined velocity along a weld path. The laser beam power is selectively modulated to have an output with a desired frequency and/or amplitude. An oscillating motion of the laser beam (18) is superimposed on top of the relative velocity of movement between the laser head (16) and the workpieces (12, 14) along the weld path, such that a rate of cooling of molten metal is controlled to a predetermined rate. A stroke rate of the oscillating motion is synchronized with the frequency of the modulated power output.
Des pièces (12, 14) d'alliage métallique sont soudées au laser à l'aide d'une tête (16) laser émettant un faisceau laser (18). Un servomoteur fixé à une liaison (36) imprime un mouvement oscillant à la tête laser (16). En cours de fonctionnement, celle-ci se déplace par rapport aux pièces (12, 14) à une vitesse donnée le long d'une ligne de soudure. La puissance du faisceau laser est sélectivement modulée en fréquence et/ou en amplitude et le mouvement oscillant du faisceau (18) se superpose au déplacement relatif de la tête (16) par rapport aux pièces (12, 14) le long de la ligne de soudure, ce qui permet de maintenir la vitesse de refroidissement du métal fondu à un niveau donné. La course des oscillations est en synchronisme avec la fréquence de la puissance modulée émise.
Progressive Tool & Industries Company
Sim & Mcburney
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