According to the different product structure, butt fusion welding process and lapseam welding process are used to respectively weld left and right half shell of upper body.
上体左、右半壳直焊缝视产品结构不同，分别采用对接熔化焊和搭接缝焊工艺。
2
Using a seam auto - tracking technique with arc sensor, seam tracking experiments for circumferential lapweld of automobile air storage vessel have been performed in this paper.