Efficient welding technology for steel structure based on BH submerged arc welding

Abstract

The invention discloses an efficient welding technology for a steel structure based on BH submerged arc welding. The technology comprises the following steps that 1, two lifting devices are arranged on a substrate, two supporting plates are connected to the inner sides of the upper portions of the two lifting devices, meanwhile, two telescopic cylinders are arranged at the inner sides of the middles of the lifting devices, and pressing plates are arranged at the front ends of the telescopic cylinders; 2, grooves are formed in the front face and the back face of the two ends of a web; 3, one wing plate is placed on the substrate, the other wing plate is placed on the two supporting plates, and the web is vertically placed between the two wing plates; 4, rust and oil stains at the portions,within the range of 25 mm, of the two sides and the surfaces of the grooves are removed by a grinding wheel or a wire brush; 5, submerged arc welding is adopted for performing automatic welding; 6, finally, filling and cover face welding are performed. According to the efficient welding technology for the steel structure based on BH submerged arc welding, manpower is relieved, the welding efficiency is improved, meanwhile, the web can be effectively fixed, and the phenomenon that the welding quality is lowered due to the fact that the web deflects in the welding process is avoided.

Description

technical field [0001] The invention relates to a high-efficiency welding process for steel structures based on BH submerged arc welding, and belongs to the technical field of steel structures. Background technique [0002] H-shaped steel is an economical cross-section high-efficiency profile with more optimized cross-sectional area distribution and a more reasonable strength-to-weight ratio. It is widely used in various civil and industrial building structures, as well as various long-span industrial plants and modern high-rise buildings. H steel is composed of two parallel flanges and a web. The web is located between the two flanges and is perpendicular to the two flanges respectively. Four welds to be welded will be formed between the upper and lower ends of the web and the flange. seam. Submerged arc welding is a welding method in which the arc burns under the flux layer. It has the advantages of stable welding quality, high welding productivity, no arc light and littl...

AI Technical Summary

Problems solved by technology

There are problems in this way. Firstly, it is time-consuming and labor-intensive, and the efficiency is not high. In addition, the manual method may cause deviation of the flange and web, which will seriously affect the welding quality.

Another point is that due to the long weld seam, the temperature of the first welding place is high, and the temperature of the second welding place is low. The temperature of the two sides of the steel plate to be welded is different, which will cause a slight displacement or even distortion of the weld seam to be welded.

If the fixing effect of the web is not good, it will be twisted left and right or bent upwards or downwards in the vertical direction, which will greatly affect the welding quality

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