A manufacturing process of variable-section three-dimensional triangular truss

Abstract

The invention discloses a variable-section-type three-dimensional triangular truss manufacturing process. The manufacturing process includes the steps that a drag arm is manufactured and assembled and welded, two side face piece frames and a bottom face piece frame are manufactured, the two side face piece frames are pre-spliced and spliced on a tangent horizontal jig manufacturing frame, the bottom face piece frame serving as a jig frame face is folded to form a three-dimensional triangular truss on a tangent positive jig manufacturing frame; when a single piece of truss and the three-dimensional truss are manufactured, the trusses are each divided into three segments according to natural connectors are manufactured on the same jig frame, and allowance-free connectors are manufactured in the close-to-center segments and the middle segments; when samples are placed, 500 mm allowance is reserved for the drag arm and a lower drive shaft sleeve flange bolt joint end main pipe; when scribing is conducted on main pipes among web members, enlargement by 1 mm is conducted each interval, and all the middle web members are decreased by 2 mm in the sample placing process; after the three segments of three-dimensional triangular trusses are manufactured, the middle segment and the far-from-center segment are integrally combined, the close-to-center segment is pre-spliced with a lower drive shaft sleeve and then is integrally folded with other segments, and manufacturing is finished. The variable-section-type three-dimensional triangular truss manufacturing process has the advantages that the positioning accuracy of all the web members between the two side piece frames can be improved, and positioning efficiency is improved.

Description

technical field [0001] The invention relates to the field of truss manufacturing, in particular to a manufacturing process of variable section three-dimensional triangular trusses. Background technique [0002] The ideal hinged system of straight rods that are only subjected to node loads is called a truss structure. It is abstracted and simplified by some engineering structures whose shafts intersect at one point. Trusses were first used in the construction of wooden bridges and roof trusses. The ancient Romans used trusses to build the superstructure of the Tre River Bridge across the Danube (found in Roman reliefs). During the Renaissance, Italian architects (Palladio Palladio) also began to use wooden trusses to build bridges. Tang type, Hao type truss. The earliest metal trusses in Britain were built in 1845 to suit lattice trusses similar to soup timber trusses, followed by triangular Warren trusses the following year. [0003] The current manufacturing process for...

AI Technical Summary

Problems solved by technology

This kind of manufacturing process will produce a lot of high-altitude operations, and at the same time increase the difficulty of positioning the abdominal tubes on both sides, making the positioning inaccurate, reducing manufacturing quality and manufacturing efficiency