三电极MAG高速角焊焊接工艺实验研究

Study on Welding Process of Triple Electrode High Speed MAG Fillet Welding

在实际船厂的角焊焊接工艺应用中,多电极焊接工艺主要集中于双电极MAG焊接,焊速最大目前可以达到1.2m/min。为了进一步提高焊接速度,本文采用焊速可达1.8m/min的三电极高速弧焊角焊明弧焊接工艺,进行了焊接规范组合与空间位置实验。实验表明:焊接线能量相近时,焊缝成形参数均在一定范围内波动。焊接参数对焊接过程的稳定性影响显著,不同的焊接规范组合时,PNP极性组合的稳定性比NPN的稳定性差;焊枪倾斜角度随着角度的增大稳定性变差;焊丝距离在20和45mm时稳定性最差,而在其范围之间的焊接稳定性随着距离的增大而变好;夹角在20°和50°时稳定性较好。

Double electrode fillet welding of multi-electrode welding process was used widely in the actual shipbuilding, and the max welding speed could arrive at 1.2 m/min. In order to improve the welding speed further, various heat input and space location experiments were carried out by triple-electrode welding process at welding speed of 1.8m/min. The results indicate that welding geometry parameters fluctuate within a certain range when the heat input is similar. Welding parameters play an important role in welding stability. The welding stability of PNP is worse than that of NPN under different welding conditions. The welding stability becomes worse with the increase of the electrode tilt angle. The welding stability is worst when the distance between wire and wire is 20mm and 45mm, but it becomes better with the increase of the distance within 20mm～45 mm. The welding stability is good when the senaration angle is 20° and 50°.