Device for reducing the ablation products on the surface of a work piece during laser drilling
AssigneeRobert Bosch GmbH
InventorsBertrand Joseph, Johannes Wais, Gert Callies, Ulrich Graf, Beatrice Gebhard, Andreas Dauner
Life of this patent
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Abstract
A device for introducing holes into a workpiece has a laser beam source for producing at least one laser beam which may be directed toward the workpiece. A nozzle system is provided having at least one nozzle which may have a gas under pressure applied to it, the gas flow exiting the nozzle being aligned in relation to the workpiece surface in such a way that molten particles detached from the workpiece are guided away from the hole produced by the laser beam.
Claims10
A device for introducing a hole into a workpiece, comprising:
- a laser beam source for producing at least one laser beam that may be directed toward the workpiece;
- and
- a nozzle system including at least one nozzle and being capable of having a gas under pressure applied thereto, a gas flow exiting the at least one nozzle being aligned in relation to a surface of the workpiece in such a way that molten particles detached from the workpiece are guided away from the hole produced by the at least one laser beam;
- wherein the nozzle system includes at least one transverse flow nozzle and a protective gas nozzle, the transverse flow nozzle aligned in relation to the protective gas nozzle to deflect a protective gas flow away from a workpiece surface by a process gas to prevent a perpendicular incidence of the protective gas flow on the workpiece.
A device for introducing a hole into a workpiece, comprising:
- a laser beam source for producing at least one laser beam that may be directed toward the workpiece;
- a nozzle system including at least one nozzle and being capable of having a gas under pressure applied thereto, a gas flow exiting the at least one nozzle being aligned in relation to a surface of the workpiece in such a way that molten particles detached from the workpiece are guided away from the hole produced by the at least one laser beam;
- and
- a blocking device for preventing a free outflow of at least a part of a protective gas flow and provided in a discharge region of the protective gas nozzle;
- wherein the blocking device includes a baffle device for the protective gas flow, the blocking device deflecting the protective gas flow surrounding the at least one laser beam in such a way that the protective gas flow is directed toward the workpiece surface at an angle not equal to 90°.
Dependencies are inferred from the claim text.