Analysis on Weld Pool Characteristics of Narrow Gap Pipe Welding Pool Based on Passive Vision
During the narrow gap pipeline welding process,the traditional active vision laser cannot be projected into the workpiece groove due to the geometric characteristics of narrow gap,and the welding seam is easily blocked by welding wire,therefore the welding seam characteristics cannot be obtained and the welding quality cannot be judged online.The molten pool image was directly obtained through passive vision.The complete profile of welding pool in narrow gap welding was recovered by using median filter noise reduction,Canny edge detection,area filter screening and circle fitting.Two characteristic parameters including the radius of curvature and the advancing angle of the weld pool profile were extracted.The results of pipeline welding experiments show that the larger the welding current is,the larger two characteristic parameters are.The range of the characteristic parameters in penetration state was analyzed to provide a basis for subsequent parameter adjustment.
narrow gap weldingpassive visionimage processingmolten pool characteristics
NETL
NSTL
万方数据
