Whole plate thick penetration welding method for intersection joint of circular tube

Abstract

The invention belongs to the technical field of steel tube welding and specifically relates to a whole plate thick penetration welding method for an intersection joint of a circular tube. The method comprises the following specific steps that a, the intersection circular tube is cut through a intersection line, and the position of a cutting starting point is marked; b, a starting point of a base plate is identical to the cutting starting point of the intersection circular tube, and an installation datum line is drawn on the outer side of the base plate with the cutting starting point as a datum; c, the intersection circular tube is assembled, and the precision of the installation dimensions of the circular tube is ensured; d, the special-shaped intersection base plate is assembled and stuffed in form the tail portion of the circular tube, and the installation datum line of the base plate is made coincide with the datum line of the inner wall of the circular tube; e, secondary groove machining is conducted, and a groove is polished through a polisher to make the groove face smooth after groove machining is finished; and f, groove machining is conducted, and the intersection joint can meet the requirement of a whole plate thick penetration welding line. According to the method, the conditions that the side portion and the root portion of the circular tube can not achieve full penetration are avoided.

Description

technical field [0001] The invention belongs to the technical field of steel pipe welding, and in particular relates to a full-thickness penetration welding method for intersecting joints of round pipes. Background technique [0002] The construction steel structure industry is now in a stage of rapid development. Steel structure enterprises are emerging side by side. Improving the welding technology of enterprises is an important way and development goal for the competition of the steel structure welding industry. At present, in the production of steel structures of large-span stadiums and exhibition centers, there are a large number of intersecting line welding nodes. Because the intersecting openings of circular pipes are irregular welds, it is difficult to add backing plates for welding, and the diameter of circular pipes is too small ( Diameter D≤600mm), workers cannot carry out back root cleaning inside the round pipe, so that this type of joint cannot meet the require...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a full-thickness penetration welding method for circular pipe intersecting joints, in order to solve the problem that the welds of special-shaped intersecting lines cannot achieve full-thickness penetration, so as to meet the stress requirements of design engineers on intersecting line joints Requirements, so that this node is no longer applied to the project in the way of steel castings

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