Laser welding of sandwich structures

Details Laser welding of sandwich structures Laser welding of sandwich structures

B - Operations, Transporting

23

K

327/1.3

B23K 26/18 (2006.01) B23K 31/02 (2006.01)

Patent

CA 1237484

82L7 LASER WELDING OF SANDWICH STRUCTURES ABSTRACT A process is disclosed for bonding multi-layer sheet struc- ture by using controlled depth laser welding. The laser energy may be applied in stages, whereby the inner sheets are first welded together and, the outer sheets are then joined thereto. The sheets are thereafter expanded to form the desired struc- ture. Although the laser energy may be varied to control the depth of penetration, one embodiment utilizes a shield material to be applied between two sheets to prevent the laser energy from penetrating and joining the two sheets together. Similarly, shields may be used to control the width of the laser weld. 0594D -23-

488061

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