| 摘要 |
<p>The present invention relates to a laser-cutting apparatus comprising an emitter of laser radiation, a focusing lens (7) fixed in a sliding sheath (4) which is adjustable, the said sheath being prolonged, on the side of the material to be cut (16), by a frustoconical nozzle (8) whose small end is in the immediate vicinity of the material to be cut, the said apparatus comprising a fume- removing device formed by a hood (9) - called ejector - open on the side of the material to be cut and fixed to the said sliding sheath (4). …<??>According to the invention, the said ejector (9) comprises, around its perimeter and over its open face situated opposite the material to be cut, openings (12) enabling gas-air to be injected along convergent axes and in its upper portion a pipe (15) for removing gases. …<??>Application: cutting of sheet materials. Single plate. …<IMAGE>… </p> |
