The size of the melt pool created by the laser is one of the most important quality characteristic in a laser metal deposition process. This paper discusses the development of a low-cost vision system to automatically determine the size of the melt pool for in-process control. To cope with the intense infrared signal from the laser and melt pool, external ultraviolet illumination is paired with narrow bandpass filters on a usb microscope to achieve a clear image of the melt pool. The sensitivity of the melt pool to changes in system parameters and various substrate materials are also evaluated.
S. Barua et al., "Development of a Low Cost Imaging System for a Laser Metal Deposition Process," Proceedings of the 21st Annual International Solid Freeform Fabrication Symposium (2010, Austin, TX), pp. 121-127, University of Texas at Austin, Aug 2010.
21st Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference (2010: Aug. 9-11, Austin, TX)
Mechanical and Aerospace Engineering
Intelligent Systems Center
Article - Conference proceedings
11 Aug 2010