中国激光, 2017, 44 (5): 0502003, 网络出版: 2017-05-03   

奥氏体不锈钢光纤激光同轴保护焊接的实时监测 下载: 505次

Real-Time Monitoring of Coaxial Protection Fiber Laser Welding of Austenitic Stainless Steels
作者单位
北京工业大学激光工程研究院高功率及超快激光先进制造实验室, 北京 100124
摘要
采用光纤激光同轴保护焊接奥氏体不锈钢,利用激光焊接监测系统同步采集焊接过程中的光信号数据,并结合羽辉的形貌研究不同焊接条件对焊缝成形及光信号强度的影响规律。研究结果表明,光信号强度随着激光功率的增加逐渐增大。当离焦量从-6 mm变化到6 mm时,光信号强度先减小后增大。光信号变化可反映焊缝熔深的变化,可用于检测搭接间隙和焊缝位置变化引起的焊缝缺陷。通过P信号数据可判断焊接质量异常区的准确位置,焊接过程中光信号的强度同羽辉体积正相关。
Abstract
The austenitic stainless steel is welded with the fiber laser and coaxial protection method. The optical signals during the welding process are collected by the laser welding and synchronously monitoring system, which is combined with the shape of plume to study the influence laws of different welding conditions on the weld formation and optical signal intensity. The results show that the optical signal intensity gradually increases with the increase of laser power. When the defocusing amount changes from -6 mm to 6 mm, the optical signal intensity decreases first and then increases. The optical signal change can reflect the change of weld penetration, which can be used to detect the weld defects caused by the change of the lap gap and the weld position. The exact location of the area with the abnormal welding quality can be judged by analyzing P signal data. The optical signal intensity is positively related to the plume volume during the welding process.

任勇, 武强, 邹江林, 陈乐, 肖荣诗. 奥氏体不锈钢光纤激光同轴保护焊接的实时监测[J]. 中国激光, 2017, 44(5): 0502003. Ren Yong, Wu Qiang, Zou Jianglin, Chen Le, Xiao Rongshi. Real-Time Monitoring of Coaxial Protection Fiber Laser Welding of Austenitic Stainless Steels[J]. Chinese Journal of Lasers, 2017, 44(5): 0502003.

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