IN SITU MONITORING MOLTEN POOL PARAMETERS FOR DETECTING VISIBLE DEFECTS IN LASER CLADDING

Consisting of a CCD camera, a frame grabber and a computer, a system is developed to monitor the molten pool parameters in laser cladding. The molten pool images, grabbed by the CCD camera, are processed by the software, and then the geometry and temperature field distribution of molten pool are measured, which can show the changes in laser cladding. The relationship between the molten pool parameter and the visible defects is revealed, and the visible defects can be detected in-time by diagnosis of the molten pool parameters.