Device and process for the laser welding of a tube
AssigneeSiemens Aktiengesellschaft
InventorGerhard Kroehnert
Life of this patent
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Abstract
A process and device for the laser welding of a tube (14) along its inner circumference with a probe (1) that can be inserted in the tube (14) has for the focusing and deflection of a laser beam (57) propagated within the probe (1), mainly along its longitudinal axis (10), at least one optical element (41, 65), which generates a deflected laser beam (59) focused on a focal point (F) lying outside the probe (1), the direction of whose propagation is oriented obliquely relative to the longitudinal axis (10). By this means, both the thermal stress on the deflecting elements (41, 65) mounted within the probe (1) and any precipitation of welding material in the interior of the probe (1) are reduced.
Claims37
A device for laser welding a tube, comprising:
- a welding unit for insertion into the tube and including at least one deflecting member for deflecting a laser beam transmitted substantially in the direction of a longitudinal axis of the welding unit at an oblique angle relative to the longitudinal axis and onto a focal point located outside of the probe for welding the tube.
A process for laser welding a tube, comprising the steps of:
- inserting a welding unit into the tube;
- transmitting a laser beam within the welding unit in a direction substantially parallel to the longitudinal axis of the welding unit;
- and
- deflecting the laser beam at an oblique angle relative to the longitudinal axis of the welding unit onto a surface of the tube to weld the tube.
Dependencies are inferred from the claim text.