Reversely deformed jig frame for welding U ribs of steel box girder

Abstract

The invention relates to the welding technique, in particular to a reversely deformed jig frame for welding U ribs of a steel box girder, which comprises a base, a frame, a supporting rod, an arc board and clamping apparatuses, wherein the base is fixed on the foundation and is articulated with the frame; the supporting rod for supporting the frame to rotate laterally is connected between the base and the frame; the frame is connected with the arc board; a bolt connecting hole array is arranged on the arc board; and the clamping apparatuses are connected with bolt connecting holes corresponding to the arc board according to the width of a welding board unit. In the invention, the arc board and the clamping apparatuses are matched for use; before the welding process is carried out, proper reverse deformation is applied to a welding panel to cancel out the angular deformation generated in the welding process, thereby ensuring the welding quality and reducing the working hours of manual correction; if a panel unit is longer, the jig frame can be lengthened by the bolt connecting holes at the end part of the jig frame, thereby meeting the purpose of welding panel units of random lengths; and the width between the clamping apparatuses can be adjusted to be suitable for tightly clamping panel units of different widths. The whole device has simple structure, easy manufacture and low manufacturing cost and is beneficial to popularization and application.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an anti-deformation tire frame used for welding steel box girder U ribs and plate units. Background technique [0002] Steel box girder, also known as steel plate box girder, is a common structural form of long-span bridges, and it is more and more widely used. There are generally many U-ribs to be welded on the top or bottom plate of steel box girders. After the U-ribs are welded to the fillet welds of the panel, due to the influence of welding heat, the panel will have welding corner deformation. The welding deformation not only affects the manufacturing accuracy of the panel unit, And can't carry out welding with welding trolley, thereby can't realize the reliable welding of U rib and panel. If it meets the flatness requirements through flame straightening, a considerable amount of work will be required. For this reason, the welding anti-deformation technology is often used...

AI Technical Summary

Problems solved by technology

There are generally many U-ribs to be welded on the top or bottom plate of steel box girders. After the U-ribs are welded to the fillet welds of the panel, due to the influence of welding heat, the panel will have welding corner deformation. The welding deformation not only affects the manufacturing accuracy of the panel unit, Moreover, it is impossible to use a welding trolley for welding, so it is impossible to achieve reliable welding between the U rib and the panel

If it meets the flatness requirements through flame straightening, a considerable amount of work will be required

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