@inproceedings{bd28eb8be8cf40f2a3d853be1e920803,
title = "Method for controlling a laser additive process using intrinsic illumination",
abstract = "One form of additive manufacturing is to use a laser to generate a melt pool from powdered metal that is sprayed from a nozzle. The laser net-shape machining system builds the part a layer at a time by following a predetermined path. However, because the path may need to take many turns, maintaining a constant melt pool may not be easy. A straight section may require one speed and power while a sharp bend would over melt the metal at the same settings. This paper describes a process monitoring method that uses the intrinsic IR radiation from the melt pool along with a process model configured to establish target values for the parameters associated with the manufacture or repair. This model is based upon known properties of the metal being used as well as the properties of the laser beam. An adaptive control technique is then employed to control process parameters of the machining system based upon the real-time weld pool measurement. Since the system uses the heat radiant from the melt pool, other previously deposited metal does not confuse the system as only the melted material is seen by the camera.",
keywords = "Additive manufacturing, image processing, laser welding",
author = "Robert Tait and Guoshuang Cai and Magdi Azer and Xiaobin Chen and Yong Liu and Kevin Harding",
note = "Publisher Copyright: {\textcopyright} 2015 SPIE.; Dimensional Optical Metrology and Inspection for Practical Applications IV ; Conference date: 20-04-2015 Through 21-04-2015",
year = "2015",
doi = "10.1117/12.2182511",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Song Zhang and Toru Yoshizawa and Harding, {Kevin G.}",
booktitle = "Dimensional Optical Metrology and Inspection for Practical Applications IV",
}