NC machine is used to ensure that longitudinal and circular weldings are produced at a constant speed and the welding point is always in flat position.
数控主机用于保证箱底纵、环焊缝焊速恒定并使焊接点始终处于平焊位置。
2
Such factors as structure design and welding method are taken into consideration to prevent bottom plate of large circular storage tank made of steel from deformation during welding.
为防止大型圆筒形钢制贮罐底板的焊接变形，可从底板的结构设计、焊接方法等方面加以解决。
3
The automatic control system of circular seam welding process for non - rotated pipeline was developed in the paper.