Assembling and welding tool and method for U-shaped rib gasket of steel bridge

Abstract

The invention discloses an assembling and welding tool and method for a U-shaped rib gasket of a steel bridge. The assembling and welding tool comprises a bottom plate, supporting plates, first guide blocks, a cam and first jacking rods. The supporting plates are fixed to the two sides of the bottom plate correspondingly, the plurality of first guide blocks are fixed between the supporting plates, and the first jacking rods are inserted into through holes in the first guide blocks and can move along the through holes. The cam is installed between the centers of the supporting plates and can do circular motion in a cavity formed between the supporting plates, and when the far end of the cam rotates to make contact with the inner ends of the first jacking rods, the cam pushes the first jacking rods to move outwards along the through holes in the first guide blocks to jack a gasket, so that the gasket is tightly attached to the root of a U-shaped rib butt weld joint. According to the assembling and welding tool, by means of the disc-shaped cam, the disc-shaped cam rotates to abut against the steel liner and the U-shaped rib at different positions, then positioned welding is conducted, the assembling gap between the U-shaped rib and the steel liner is effectively controlled, conditions are provided for follow-up welding, and the anti-fatigue performance of the weld joint is improved.

Description

technical field [0001] The invention belongs to the technical field of welding U-shaped ribs of bridge deck units, and in particular relates to a welding assembly and welding method for U-shaped rib liners of steel bridges. Background technique [0002] The existing steel box girder bridge deck is welded by the bridge deck and U-shaped ribs, and the U-shaped ribs are connected by welding or high-strength bolts at the bridge site, and a steel liner is attached to the root of the weld during welding. Since the site can only weld on one side, the butt welding is completed on the groove side by using the steel backing on the back. However, the U-shaped gasket cannot fit the U-shaped rib well during assembly, and there are generally assembly gaps, especially the assembly gaps at the arc parts. The existence of assembly gaps greatly reduces the fatigue strength of this detail. For this reason, high-strength bolt connections are often used in domestic large-scale projects to ensur...

AI Technical Summary

Problems solved by technology

However, the U-shaped gasket cannot fit the U-shaped rib well during assembly, and there are generally assembly gaps, especially the assembly gaps in the arc parts. The existence of assembly gaps greatly reduces the fatigue strength of this detail

For this reason, high-strength bolt connections are mostly used in domestic large-scale projects to ensure the fatigue resistance of the connection parts, but the manufacturing process of high-strength bolt connections is complicated, the on-site operation is difficult, and the construction cost is high.

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