A method and system for welding large and thick plates based on double-ribbon welding wire

Abstract

The invention provides a large and thick plate welding method and system based on double strip welding wires. This method is based on the principle of double welding wire arc welding; in the welding process of large and thick plates, the weld bead layer is divided into bottom welding, filling welding and cover welding; according to the characteristics of different welding bead layers, the strip welding wire is Size selection and arrangement settings. The system includes double-ribbon welding torch A, double-ribbon welding torch B, welding control center; double-ribbon welding torch A is equipped with two ribbon welding wires of the same width; double-ribbon welding torch B is installed with two ribbon welding wire; the welding control center is used to preset the welding program, and control the double ribbon welding gun A and the double ribbon welding gun B to work according to the preset welding program; the preset welding program includes the selection of welding mode, Including root welding mode, filling welding mode, cover welding mode 1, and cover welding mode 2. The method and the system thereof can realize high-efficiency and high-quality welding of large and thick plates.

Description

technical field [0001] The invention provides a large and thick plate welding method and system based on double strip welding wires, belonging to the field of welding processing. Background technique [0002] At present, the welding methods for large and thick plates with a thickness of more than 40mm are mainly MIG / MAG welding and narrow gap laser filler wire welding. Narrow gap laser wire filler welding has the advantages of high welding quality and stability, but the laser beam has strict requirements on the assembly gap of the workpiece, the metal surface has high reflection of laser light, and the thermal efficiency is low before the molten pool is formed. side defects. For MIG / MAG welding of large thick plates, it is necessary to open a bevel to the workpiece to be welded, and the bevel size is relatively large, which requires increasing the filling amount during welding, and will reduce the welding efficiency. [0003] In order to solve the above problems, the twin-...

AI Technical Summary

Problems solved by technology

However, ordinary twin-wire MIG / MAG welding is limited by the welding torch, and the groove size is large. Although the filling volume is larger than that of single-wire MIG / MAG welding, the welding efficiency is still not high due to the size of the welding wire, especially in the welding of large and thick plates.

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