Laser cutting apparatus provided with a gas evacuation device

Details Laser cutting apparatus provided with a gas evacuation device Laser cutting apparatus provided with a gas evacuation device

1989-02-22

1990-07-17

Albritton, C. L.

Electric heating

Metal heating

By arc

21912184, B23K 2600

Patent

active

049422847

ABSTRACT:
This invention relates to a laser cutting apparatus comprising a laser radiation emitter, a focussing lens fixed in an adjustable sliding sleeve, said sleeve being extended, towards the material to be cut, by a truncated nozzle of which the small end is in the immediate vicinity of said material to be cut, said apparatus comprising a gas-evacuation device constituted by a hood--called ejector--open towards the material to be cut and fixed on said sliding sleeve. According to the invention, said ejector comprises, on its periphery and on its open face lying opposite the material to be cut, openings allowing the injection of gas-air along convergent axes, and, in its upper part, a pipe for evacuating the gases. The invention is more particularly applicable to the cutting of materials in sheet form.

REFERENCES:
patent: 3565660 (1971-03-01), Houldcroft
patent: 3626141 (1971-12-01), Daly
patent: 3656230 (1972-10-01), Friedrich
patent: 3866398 (1975-02-01), Vernon et al.
patent: 4031351 (1977-06-01), Martin
patent: 4550241 (1985-10-01), Scott et al.
patent: 4720621 (1988-01-01), Langen

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