CPC B23K 26/1476 (2013.01) [B33Y 80/00 (2014.12)] | 24 Claims |
1. A double nozzle for a laser processing head, the double nozzle comprising:
an inner body portion having (i) an interior surface defining a bore for passing a laser beam, (ii) a first interface surface near a distal end of the inner body portion, the first interface surface including a plurality of channels, and (iii) an exterior surface near a proximal end of the inner body portion and shaped to engage the laser processing head, the bore aligned with a central longitudinal axis of the double nozzle, wherein each channel includes a throat region having a minimal cross-sectional area in the channel, the throat region joining a converging region and a diverging region, the converging region defined by an interior linear edge of the outer nozzle and an exterior linear edge of the inner nozzle, the interior and exterior edges being non-parallel and converging in a cross-section that passes through the central longitudinal axis of the double nozzle and the diverging region defined by a second interior linear edge of the outer nozzle and a second exterior linear edge of the inner nozzle, the second interior linear edge and the second exterior linear edge being non-parallel and diverging in a cross-section that passes through the central longitudinal axis of the double nozzle; and
an outer body portion connected to the inner body portion, the outer body portion defining a jet surface,
wherein the jet surface and the plurality of channels define a corresponding plurality of auxiliary fluid flow paths about the bore and between the inner body portion and the outer body portion.
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