| 摘要 |
<p>An automatic submerged arc welding method for a large inserted connecting tube on a cone comprises the following steps: opening a hole on a side wall of a cone (21); inserting a connecting tube (22) into the cone, and assembly-welding an annular steel pad (23) around a part outside the cone and connected to the connecting tube; elevating two ends, namely a large opening and a small opening, of the cone respectively so that the axial direction of the connecting tube is perpendicular to the ground (27); assembly-welding a beveled steel tube (24) on the inner wall of the cone and at the connecting tube; performing preheating before welding; welding to form a welded seam (28) between the cone and the connecting tube by using a saddle-shaped submerged arc welding machine (25); performing dehydrogenation treatment after the welding is completed; and removing surplus height of the welded seam on the inner wall and polishing the welded seam smooth. The method uses the saddle-shaped automatic submerged arc welding machine to weld, at the inner wall, the inserted connecting tube and the cone, so as to improve the production efficiency and reduce the influence of human factors on the welding quality, thereby avoiding the problem of difficulty in repairing, shortening the manufacturing cycle and reducing the manufacturing costs.</p> |
