Manufacturing process of column-free large-span steel structure curved box girder

Abstract

The invention discloses a manufacturing process of a column-free large-span steel structure curved box girder, and relates to the technical field of steel structure component production. The method comprises the following steps: (1) preparing a steel plate raw material, and derusting the surface of a steel plate through a derusting machine; (2) blanking: according to a designed three-dimensional model, cutting the steel plate into a web plate and a wing plate with set sizes by adopting a cutting machine, and twisting the web plate and the wing plate until meeting design requirements; and (3) assembling and building a jig frame, placing the web plate and the wing plate on the jig frame for welding, and performing correcting after the welding is completed. The derusting machine in the step (1) comprises a machine body, a feeding frame, a discharging frame and a supporting frame installed at the end, away from the feeding frame, of the discharging frame, a cylinder is rotationally arranged on the supporting frame, and a driving source used for driving the cylinder to rotate is arranged on the supporting frame; and the cylinder is provided with an inserting groove penetrating through the two sides in the radial direction. The manufacturing process can reduce the labor intensity during steel plate rust removal.

Description

technical field [0001] The application relates to the technical field of production of steel structural components, in particular to the manufacturing process of curved arc box girders of large-span steel structures without columns. Background technique [0002] At present, due to the advantages of high strength, good toughness, good shock absorption effect and fast construction speed, curved box girder has been widely used in long-span steel structures and bridges. The curved box girder is usually made of steel plate, which is mainly composed of two webs and two wing plates welded. Its production process mainly includes the preparation of corresponding steel plate raw materials, and derusting treatment by derusting machine. According to the design drawings, Use a cutting machine to cut out the initial material of the web and the flange, and cut the groove on the edge position that needs to be welded; build the tire frame, place the web and the flange on the tire frame, and ...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that when the pass-through derusting machine is derusting the steel plate, the steel plate is sent into the machine body through conveying rollers, etc. This method can only derust the upper surface of the steel plate. Finally, it is necessary to manually turn over the steel plate on one side and perform rust removal again. The steel plate has a relatively heavy quality, and the turning operation is labor-intensive and troublesome.

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