Method for assembling vertical rectangle box type structure girder

Abstract

The invention provides a narrow-high long-big box style structural beam, comprising upper cover plates (1), web plates (2), inner-cavity clapboards of the structural beam (3) and lower cover plates (4). A plurality of process support rods (6) are arranged inside the inner cavity of the structural beam and connected with the web plates through spot welding. The assembling method of the structural beam is as follows: the clapboards and the web plates are fixed by spot welding as well as the web plates and the process support rods; the gaps caused by the spot welding between the clapboards and web plates are filled through welding; the symmetric welding is carried out from the middle part to two ends of the structural beam on the vertical direction and the multi-layer and multi-strip welding is adopted according to the size of welding angles; then the upper cover plates and lower cover plates are respectively fixed on the upper and lower ends of the web plates and clapboards through spot welding; and then welding seams are filled and the multi-layer and multi-strip welding is adopted according to the size of welding angles. The structural beam can avoid the falling or rising of the web plates so as to guarantee the inner cavity size of the structural beam, the parallelism of the web plates and the rigid on each direction and the assembling method is simple.

Description

technical field [0001] The invention relates to a manufacturing method of a structural beam, in particular to a method for assembling and welding a narrow, tall and long box-shaped structural beam. Background technique [0002] Narrow and high long box-shaped structural beams are often encountered in the railway wagon industry and construction industry. This kind of box-shaped structural beams is often located in an important load-bearing position, and requires high manufacturing requirements for the size of the inner cavity, side bending, and twist. Precision and very strict quality standards make it very difficult to manufacture. The width of the inner cavity of the two webs of this narrow and tall long box girder is between 80-500mm, and the height of the web is between 300-2000mm, which is often inconvenient for personnel to operate. The traditional manufacturing method mainly has the following disadvantages : First, the web of the box-shaped structural beam produces la...

AI Technical Summary

Problems solved by technology

The width of the inner cavity of the two webs of this narrow and tall long box girder is between 80-500mm, and the height of the web is between 300-2000mm, which is often inconvenient for personnel to operate. The traditional manufacturing method mainly has the following disadvantages : First, the web of the box-shaped structural beam produces large wave deformation; second, the box-shaped structural beam produces large side bending or distortion; stress

These shortcomings will make it difficult for box-shaped structural girders manufactured by traditional processes to meet the specified technical requirements and quality standards.

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