Cold bending manufacturing method for large-diameter steel pipe

Abstract

The invention provides a cold bending manufacturing method for a large-diameter steel pipe. By means of the cold bending manufacturing method, the defects and problems of labor and time consuming anddifficultly in precision control by flame bending are overcome and solved, and the problems of precision control on bending forming of the large-diameter steel pipe and the like are effectively solved. By means of the cold bending manufacturing method, a steel pipe with fixed curvature, steel pipes with variable curvature, and planar or irregular circular steel pipes can be bent; before pipe bending is carried out by adopting the cold bending manufacturing method, with the full utilization of computer-aided software, coordinate values of bending control points equally spaced at a certain axisare given through plane or space lofting, so as to control pipe bending manufacturing and forming; and by adopting the cold bending manufacturing method for bending the steel pipe, the equipment investment is little, the operation is convenient, the quality is good, the working efficiency is high, and the economic benefits, safety benefits and social benefits are obvious.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a cold-bending manufacturing method of a large-diameter steel pipe. Background technique [0002] With the rapid development of my country's economy, all parts of the country continue to increase investment in infrastructure, and there are more and more construction projects such as long-span steel pipe bridges, large-scale convention and exhibition centers, sports venues, railway station buildings, and airport terminals. In particular, the proportion of large-space and long-span buildings is increasing. Due to the needs of building functions, large-diameter steel pipe trusses are their preferred structural forms. The large-diameter steel pipe truss space structure has the characteristics of reasonable force, high bearing capacity, beautiful appearance, simple and smooth appearance, simple joint form, convenient construction, and economical materials, so it has been widely us...

AI Technical Summary

Problems solved by technology

For the emergence of this kind of truss, higher requirements are put forward for the steel structure construction technology, especially for the bending of the upper and lower chord curved steel pipes of the truss, which requires a new technology that is more reasonable and more in line with the quality requirements. For large-diameter thick-walled steel pipes mostly made of Q345 series, manual flame bending is used in the production process, which is not only time-consuming, but also the production accuracy is not easy to control, which cannot meet the design requirements.

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