Manufacturing process for accurate connection of large-scale steel structure members and flanges

Abstract

The invention relates to a manufacturing process for the accurate connection of large-scale steel structure members and flanges, which is characterized in that: rough selvedges on edges of the flanges are removed, and the two flanges are in close connection and are drilled commonly by using a numerical control drilling machine; a plurality of code plates are distributed on peripheral edges of the two flanges uniformly by using a spot-welding method; the end part of a box beam or an I beam which is machined into a semi-finished product is cut to form a beveled edge; lofting is performed on a working platform to mark off a structure size line, the box beam or the I beam, after being put on the working platform straightly, is fixed by using a baffle and a wedge, the flanges are put to the connection positions of connected pieces and are fixed by adopting a spot-welding method, and then the flanges are welded completely, cooled for 24 to 48 hours and subjected to non-destructive inspection; and a reinforcing rib plate is welded at the joint of the box beam or the I beam. The manufacturing process has the advantages that: the problem of difficult control of the accuracy of the connection among the large-scale steel structure members and the flanges is solved; the field installation and operation are quick; and the welding quality of flange connection is ensured and the production cost and time are saved while high machining efficiency is realized.

Description

technical field [0001] The invention belongs to the installation process in the processing of large steel structures, in particular to a manufacturing process for the precise connection of flanges of large steel structure parts. Background technique [0002] In the manufacturing process of large-scale steel structure products, such as box-shaped or H-shaped steel structures, flange connection is often used for their installation and connection. The traditional method generally uses direct welding of the flange and the connected parts. Because the flanges are easily deformed during welding, the contact surfaces of the two flanges do not fit together, and the coaxiality of the holes is also difficult to guarantee. Especially for thick plate flange joints, the welding angle of the weld bead is relatively large, and the deformation of the flange after welding is more obvious, which is more likely to cause problems such as non-vertical connection flanges, unqualified flatness, an...

AI Technical Summary

Problems solved by technology

Because the flanges are easily deformed during welding, the contact surfaces of the two flanges do not fit together, and the coaxiality of the holes is also difficult to guarantee.

Especially for thick plate flange joints, the welding angle of the weld bead is relatively large, and the deformation of the flange after welding is more obvious, which is more likely to cause problems such as non-vertical connection flanges, unqualified flatness, and deviation of hole spacing accuracy, which in turn causes problems. Subsequent construction causes difficulties, and once the problem is formed, it is difficult to repair and compensate

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