Method for manufacturing complex intersecting line hot rolling steel tube joint

Abstract

The invention discloses a method for manufacturing a complex intersecting line hot rolling steel tube joint. Each branch steel tube on the joint is unfolded, and an inner wall line and an outer wall line of an intersecting opening are selected with the cross point of the intersecting lines of the inner walls and the outer walls of the branch tubes as a datum point; the inner wall line is selected in the toe area, the outer wall line is selected in the root area, and the shape of the intersecting opening is obtained; the lowest point of the intersecting opening serves as a starting point, a steel plate is equally divided into N parts, and the intersecting point is cut. The hot rolling technology is adopted for manufacturing the multi-tube intersecting joint to replace a cast steel joint, so that machining time is shortened, and efficiency is improved; quality is guaranteed, cost input is reduced, and environment is protected. When the intersecting opening is unfolded to be blanked, selection of the intersecting lines of the inner walls and the outer walls is considered, and assembly precision is guaranteed. The technology of carrying out unfolding blanking and rolling in sequence is adopted, so that materials are saved.

Description

technical field [0001] The invention relates to a method for manufacturing a steel pipe node, in particular to a method for manufacturing a hot-rolled steel pipe node with complex intersecting lines. Background technique [0002] In recent years, steel castings have been widely used in the field of steel structure engineering. Many stations, venues, airports and other projects use steel castings, which has made a certain contribution to the development of engineering technology. However, the high pollution and high consumption caused by steel castings in the production process have attracted more and more people's attention, which is incompatible with the current environmental protection trend. In addition, the defects of steel castings, such as sand holes, pores, cracks, shrinkage cavities and inclusions, as well as the harsh requirements for welding process conditions, etc., need to find alternative products. In addition, the processing of steel castings takes a long time...

AI Technical Summary

Problems solved by technology

[0006] In the existing technology, the hot coil technology is only used in the production of steel pipes. For the production of steel pipe joints with small diameter-thickness ratio, thick wall, multi-pipe intersecting, and complex intersecting lines, cast steel is generally used, and the manufacturing method of steel pipe joints needs to be improved Improve

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