窄间隙MAG焊侧壁熔深信息的获取与同步化

Information acquisition and synchronization about sidewall penetration of narrow gap MAG welding

窄间隙焊中坡口侧壁熔深是反映焊接质量的重要参数,针对侧壁熔深信息难以直接获取的问题,提出一种窄间隙MAG焊熔深信息离线获取,并实现与其他焊接数据采集信息同步的方法。首先设计了一个划线装置,实现在工件上标记开始数据采集到结束数据采集的位置,其次通过平行焊接方向、在工件最大熔深位置处对工件进行切割、打磨、腐蚀,获取整体熔合线变化曲线,并采用人机交互的图像处理算法对熔合线进行边缘提取和函数拟合,实现侧壁熔深信息获取及与其他数据信息的同步,为进一步的熔深建模和控制研究奠定基础。

The groove sidewall penetration is important for quality control of narrow gap welding, but it is usually hard to acquire directly. Therefore,an offline sidewall penetration information acquisition and synchronization method was put forward for other welding information. Firstly,a marking device was designed to mark the beginning and ending position on work piece during data acquisition. Secondly,the work piece was cut parallel to the welding direction at the max sidewall penetration＇s vertical position ,and then polished and corroded to get the fusion line. Thirdly,a human-computer interaction image processing algorithm was brought forward to detect fusion line and get its fitting curve function. Finally,the information of sidewall penetration was acquired and the synchronization between the information of sidewall penetration and other welding data were realized,to lay the foundation for further penetration of the modeling and control study.