工件倾角对脉冲MAG焊接熔池形态和焊缝尺寸的影响

Effect of workpiece inclination on weld pool shape and weld forming in pulsed MAG welding

关键词:  工件倾角  高速摄影  图像处理  熔池形态  焊缝成形

Key words:  workpiece inclination angle  high speed photography  image processing  shape of molten pool  weld forming

摘要:

在相同MAG焊接参数条件下，采用单因素试验方法对不同倾角的工件进行了上坡焊和下坡焊工艺试验. 通过高速摄像技术以及图像处理技术提取了熔池边缘及尺寸等特征参数信息，并对熔池面积、后拖角等相关参数进行了修正. 分析了工件倾角对熔池宽度、长度、面积、后部面积、后拖角等特征参数以及焊缝成形的影响. 结果表明，当工件倾角超过30°时，工件倾角对熔池形态特征参数和焊缝尺寸有比较明显的影响，且该影响在上坡焊和下坡焊中的表现不同. 研究结果对减少非水平位置焊接产生的焊接缺陷和改善焊接工艺具有重要的指导意义.

Abstract:

In this paper, the uphill welding and downhill welding tests were carried out on workpieces with different dip angles under the same MAG welding parameters by single factor test method. The characteristic parameters such as edge and size of the molten pool were extracted by High speed camera and image processing technology and the area and rear drag angle of the molten pool was corrected. The influence of workpiece dip angle on weld pool width, length, area, rear drag angle and weld forming was analyzed. The results show that when the dip angle of the workpiece exceeds 30°, the obliquity of the workpiece has obvious influence on the morphological characteristic parameters and the size of molten pool and it is different in uphill and downhill welding. It is of great significance to reduce welding defects and improve welding process in non-horizontal position welding.