Numerical Study of Keyhole Centroid Infrared Image Based on Fixed Threshold Method during High Power Fiber Laser Welding
Seam tracking is significant to obtain good welding quality.Aiming at establishing a model to detect and calculate the seam tracking offset during high-power fiber laser welding of Type 304 austenitic stainless steel plate butt joint welding,an infrared sensitive high-speed camera arranged off-axis orientation of laser beam was applied to capture the dynamic thermal images of molten pools.Through analyzing the molten pool infrared images,the keyhole was extracted by using the fixed threshold method.Extracted keyhole image from different threshold values 0.55,0.65,0.85,and 0.93,were further analyzed to study their differences.Using keyhole images and calculating the keyhole centroid during high-power fiber laser welding,the deviations between the keyhole centroid and the welding seam was analyzed.The welding experiments confirmed that the keyhole centroid was related to the seam offset and the proposed welding seam equation was effective.
Molten pool Seam gap High-power fiber laser welding Weld seam
Yu-Quan Chen Xiang-Dong Gao Jian-Yuan Huang Qian Wen
School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou510006,China
国际会议
沈阳
英文
1189-1192
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）