System and method for closed-loop control of laser cladding...

B - Operations – Transporting – 23 – K

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B23K 26/34 (2006.01) B05B 7/22 (2006.01) B23K 26/03 (2006.01) B23K 26/14 (2006.01) C23C 4/12 (2006.01) C23C 24/08 (2006.01) C23C 24/10 (2006.01) C23C 26/02 (2006.01)

Patent

CA 2504368

A system is disclosed for monitoring and controlling laser cladding process by powder injection in real-time. The invention combines laser cladding technique along with automated direct feedback control to achieve a good quality clad in terms of dimensional and metallurgical characteristics. The system uses optical CCD-based image detectors (20) in the feedback system. The optical CCD- based detectors (20) along with a pattern recognition algorithm is used to determine the clad characteristics in real-time. These characteristics are clad dimensions, solidification rate, and roughness that are fed into a closed loop control system (18) to adjust the laser (12) power and table (16) velocity to produce desired clad quality.

L'invention concerne un système servant à réguler et à commander un procédé de plaquage laser par injection de poudre en temps réel. Cette invention combine une technique de plaquage laser avec une commande de rétroaction directe automatisée en vue de produire un plaquage de bonne qualité en terme de caractéristiques dimensionnelle et métallurgique. Le système utilise des détecteurs basés sur un dispositif à couplage de charges optique en tant que système de rétroaction. Ces détecteurs possédant un algorithme de reconnaissance de motif sont utilisés en vue de déterminer les caractéristiques de plaquage en temps réel. Ces caractéristiques sont les dimensions, le taux de solidification, et la rugosité du plaquage, celles-ci sont alimentées dans un système de commande à boucle fermée afin de régler la puissance du laser et la vitesse de la table en vue de produire une qualité de plaquage souhaitée.

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