Device, used to weld tube with connection element by laser, comprises laser light source arranged on arrangement circle, and reflective device having surface, where laser light source is arranged in connecting region in welding position

摘要

The welding device comprises a laser light source (18) arranged on an arrangement circle (22). A tube and a connection element are connected to each other. The laser light source is arranged in the connecting region in a welding position to irradiate the laser light. The connection region is irradiated at the welding position along its entire circumference with laser light, when the laser light sources illuminate to weld the tube to the connection element at the same time. The welding device further comprises a reflective device having a reflective surface. The welding device comprises a laser light source (18) arranged on an arrangement circle (22). A tube and a connection element are connected to each other. The laser light source is arranged in the connecting region in a welding position to irradiate the laser light. The connection region is irradiated at the welding position along its entire circumference with laser light, when the laser light sources illuminate to weld the tube to the connection element at the same time. The welding device further comprises a reflective device having a reflective surface in the form of a circumferential surface formed of a straight circular cylinder (32), and first and second lid members. The reflection surface reflects laser light from the laser light sources, and is a bounded region within welding position. The first and second lid members are spaced apart from each other, and comprise a first planar reflecting surface and a second planar reflective surface respectively. The reflecting surfaces are arranged parallel to base surfaces of the straight circular cylinder. A through hole is formed in form of a funnel-shaped aperture in the lid member. The laser source includes a diode laser. The reflective device comprises a through-beam hole for passage of laser from the source. The through-beam hole extends into the reflecting surface. The welding position is located on a symmetric axis of the straight circular cylinder. An independent claim is included for a method for welding a tube with a connection element by laser light.