Laser irradiation nozzle and laser apparatus using the same

Details Laser irradiation nozzle and laser apparatus using the same Laser irradiation nozzle and laser apparatus using the same

1993-03-12

1994-03-08

Albritton, C. L.

Electric heating

Metal heating

By arc

21912184, 372108, B23K 2600

Patent

active

052930238

ABSTRACT:
A laser irradiation nozzle free from clogging, adhesion of metal oxides, directional gas blowing, and oxidation occurring on the weld; yet capable of providing sound bead morphology and a stable weld depth on a workpiece. Accordingly, the laser irradiation nozzle comprises a conical outside nozzle and a conical inside nozzle being arranged as such to give a concentric ring-shaped top, having an assist gas outlet being established between the inside and the outside nozzles, wherein, the distance h between the laser beam focal position on the workpiece and said irradiation nozzle is controlled to a predetermined value, and the ratio of the cross sectional area of the assist gas outlet being as defined between the outside and the inside nozzles to the cross sectional area of the inside concentrical ring defined by the outer diameter of said ring on the nozzle top is also controlled to a predetermined value.

REFERENCES:
patent: 4774392 (1988-09-01), Orita
patent: 5111021 (1992-05-01), Jolys et al.
patent: 5239552 (1993-08-01), Okuyama et al.

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