Construction method for ceramic backing for butt weld of steel box bridge

Abstract

The invention discloses a construction method for a ceramic backing for a butt weld of a steel box bridge. The construction method aims to improve the welding efficiency and is environmentally friendly. The construction method comprises the following steps of 1) processing a welding groove; 2) carrying out welding assembling; 3) pasting the ceramic backing; 4) carrying out welding, specifically, starting from the groove in a run-on plate, striking the arc into a weld seam and carrying out arc quenching on a run-off plate, wherein the process from arc striking to arc quenching should be continuous, in the downward welding butt joint process, the welding speed is 13-25cm / min, in the vertical-position welding butt joint process, the welding speed is 9-23cm / min, and in the horizontal-positionwelding butt joint process, the welding speed is 20-26cm / min. According to the construction method, the process of back gouging is omitted, pollution such as smoke and noise caused by carbon arc gouging and grinding wheel grinding can be avoided, in addition, the labor intensity of workers can be greatly reduced, the working efficiency can be improved, welding materials can be saved, and the production cost can be lowered; the quality grade and the mechanical property of the weld seam can meet the requirements of the design and the specification, in addition, the forming of the back weld seamis good, spatter can be avoided, and the welding quality is easy to control; and compared with a traditional welding technology, the construction has the advantage of being more environmentally friendly.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a construction method for a ceramic liner used in a butt weld of a steel box bridge. Background technique [0002] During the manufacture and installation of steel structures such as buildings and bridges, welding construction is inevitably required. At present, the traditional welding first has strict requirements on the bevel, and the preparation of the bevel is time-consuming and labor-intensive, and it is easy to cause waste of materials; secondly, it needs to be cleaned. The space for cleaning the root is narrow, the operation is inconvenient, and the labor intensity of the welding workers is high. Welding production efficiency is low, and it is harmful to human body and environment. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a construction method of improving welding efficiency and green and environment-f...

AI Technical Summary

Problems solved by technology

At present, the traditional welding first has strict requirements on the bevel, and the preparation of the bevel is time-consuming and labor-intensive, and it is easy to cause waste of materials; secondly, it needs to be cleaned. The space for cleaning the root is narrow, the operation is inconvenient, and the labor intensity of the welding workers is high. Low welding production efficiency, great harm to human body and environment

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