Method for shaping materials with plasma-inducing...

B - Operations – Transporting – 23 – K

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B23K 26/02 (2006.01) B23K 26/03 (2006.01)

Patent

CA 2346336

The invention relates to a method for shaping materials with plasma-inducing high-energy radiation, especially laser radiation. According to said method, the momentary intensity of the plasma radiation is measured in several places on a steam capillary. In order to be able to carry out the method for lower workpiece thicknesses with good welding results, the shapes of two maximum intensity regions (10, 12) located at a distance from each other, or of another electromagnetic beam emitted from the steam capillary, and the shape of a minimum region (11) that can be formed between these two regions with extreme values are determined using a measuring technique, the so determined shapes of the regions with the extreme values are compared with predetermined region shapes, and the material processing operation is controlled in dependence on the deviations of the determined shapes from the predetermined region shapes.

Procédé de traitement de matière à l'aide d'un rayonnement haute énergie induisant un plasma, en particulier un rayonnement laser, selon lequel l'intensité momentanée du jet de plasma est mesurée en plusieurs endroits d'un capillaire de vapeur. Afin de pouvoir mettre en oeuvre ledit procédé même pour des épaisseurs de pièce minimes avec des résultats de soudage irréprochables, on détermine par une technique de mesure les formes de deux zones (10, 12) d'intensité maximale distantes l'une de l'autre ou d'un autre rayonnement électromagnétique émis par les capillaires de vapeur et d'une zone (11) d'intensité minimale située entre ces deux zones de valeurs extrêmes. On compare ensuite les formes des zones de valeurs extrêmes dont les mesures ont été déterminées avec des formes de zones prédéterminées et on commande le traitement de la matière en fonction des écarts entre les formes mesurées et les formes de zones prédéterminées.

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