Production method of non-developable surface structure of large bridge steel tower

Abstract

The invention discloses a production method of a non-developable surface structure of a large bridge steel tower. The method comprises the following steps of: constructing a simplified model of straight line instead of curve according to a curved surface structure by using Solidworks software, preparing a solid body, unfolding the solid body and drawing a curved surface flattening picture; pre-processing a board, blanking, marking out and digging according to the curved surface flattening picture, bending a bending line, detecting a sample plate, and carrying out flame finishing to obtain a split two-dimensional space curved surface; pre-processing the board, blanking, marking out and digging according to a curved surface flattening picture, bending a bending line, detecting a sample plate, carrying out flame finishing, dividing and marking out to carry out multiple divisions, weighting and matching in the field, cutting, assembling and welding to obtain a three-dimensional space curved surface; assembling and welding the split two-dimensional space curved surface and / or the three-dimensional space curved surface in the field, detecting flaw, and coping a welding line. The method provided by the invention is convenient and feasible, the production precise conforms to the design requirements and is simple to operate, hot rolling and a special mould are not adopted, the investment cost is low, and the change and the influence on the mechanical property of a steel material are avoided.

Description

technical field [0001] The invention relates to the field of manufacturing large-scale bridge steel towers, in particular to a method for manufacturing a non-developable curved surface structure of large-scale bridge steel towers. Background technique [0002] For non-developable curved surface structures, CNC profiling technology (hot rolling or cold pressing) is currently used more often. This method is more convenient and economical for thin plates and components with large batches. However, for the non-developable curved surface of large bridge steel towers, the thick plates have many specifications, small batches and high precision requirements, and the requirements for pressure forming equipment are also high. At the same time, special dies must be designed for components of different shapes. Complexity, high input cost, and certain impact on the material and mechanical properties of the steel structure. [0003] At present, the corners of steel tower segments of larg...

AI Technical Summary

Problems solved by technology

However, for the non-developable curved surface of large bridge steel towers, the thick plates have many specifications, small batches and high precision requirements, and the requirements for pressure forming equipment are also high. At the same time, special dies must be designed for components of different shapes. Complexity, high input cost, and certain impact on the material and mechanical properties of the steel structure

[0003] At present, the corners of steel tower segments of large domestic bridges are mostly rectangular plane structures. According to the landscape and wind resistance requirements of steel towers, steel towers with corners designed as non-developable curved surfaces have appeared. Due to their complex line shape, novel structure, and precision control Extremely difficult, there is no mature production method

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