Welded assembly method of box girder

Abstract

The invention relates to the technical field of welding technology, and discloses a welded assembly method of a box girder. The box girder comprises an upper cover plate, a lower cover plate and two web plates. The welded assembly method of the box girder comprises following steps in sequence: the upper cover plate, the lower cover plate and the two web plates are located and assembled to form a box-shaped structure, wherein each web plate is located and assembled between the upper cover plate and the lower plate, and the locating and assembling root portion of each web plate between the web plate and the upper cover plate and the lower cover plate is provided with a welding groove with an opening towards the outside of the box structure. Each web plate is welded and assembled with the upper cover plate and the lower cover plate, wherein each web plate is placed horizontally upward in sequence when each pair of locating and assembling connectors is carried out welding, and the welding groove corresponding to each web plate faces upward. The welded assembly method of the box girder can reduce the filling quantity of weld metal in the premix of guaranteeing the welding quality of the box girder, therefore reduces weld consumption, reduces welding cost of the box girder, and further improves welding and assembling efficiency.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a welding and assembling method of a box girder. Background technique [0002] The box girder is a beam-like structure welded by four steel plates. The cross-section is usually rectangular. It has the advantages of strong bearing capacity, high rigidity, and light weight. It is widely used in construction machinery, construction and other fields. [0003] Such as figure 1 As shown, the box girder usually includes: an upper cover 1, a lower cover 2 and two webs 3, and the two webs 3 are connected with the upper cover 1 and the lower cover 2 by welding . The welding assembly method of the existing box girder usually includes the following steps: [0004] 1. Place the lower cover plate 2 on the tooling platform 6 as the assembly reference, see figure 2 shown; [0005] 2. Position and assemble the two webs 3 respectively on the lower cover 2 to form an inverted Π-sha...

AI Technical Summary

Problems solved by technology

[0008] The defect of the prior art is that, in order to ensure the welding quality of the box girder, the number of welding layers of the fillet weld is usually at least two layers, the filling amount of the weld metal is relatively large, and the consumption of welding consumables is large, which not only affects the box girder. The welding efficiency of the beam increases the welding cost, and it is not conducive to controlling the welding deformation

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