Single-wire submerged arc surfacing welding electromagnetic stirring magnetic head

Abstract

The invention relates to a single-wire submerged arc surfacing welding electromagnetic stirring magnetic head, which consists of a tee joint, a welding torch, a magnetic core, a magnetic core ceramic protection cover, a magnetic guide nozzle, a welding flux conveying pipe, a magnetic guide nozzle protection cover and a hollow copper solenoid, wherein the tee joint is arranged inside the magnetic core, the welding torch and the welding flux conveying pipe are installed on the tee joint, and the magnetic core ceramic protection cover and the hollow copper solenoid are installed outside the magnetic core. The hollow copper solenoid is wound inside a helical groove of the magnetic core ceramic protection cover, and two ends of the hollow copper solenoid are connected to cooling water through a hose. The magnetic guide nozzle is installed on the lower part of the magnetic core, and the magnetic core and the magnetic guide nozzle are welded together through a high-magnetic-conductivity ferromagnetic material. The magnetic guide nozzle and the magnetic core are connected together through the high-magnetic-conductivity material, the magnetic guide nozzle protection cover which is made of a high-temperature-resistant and insulated ceramic material is installed outside the magnetic guide nozzle, the hollow copper solenoid is wound on the magnetic core ceramic protection cover, and the cooling water flows inside the hollow copper solenoid so as to cool the hollow copper solenoid. By adopting the structure, the single-wire submerged arc surfacing welding electromagnetic stirring magnetic head not only is applicable to ordinary submerged arc surfacing welding, but also can realize a better submerged arc surfacing welding effect under a high-temperature environment.

Description

technical field [0001] The electromagnetic stirring magnetic head for monofilament submerged arc surfacing welding according to the invention belongs to the field of welding technology, relates to submerged arc surfacing technology, in particular to an electromagnetic stirring magnetic head which uses an external magnetic field to control the submerged arc surfacing process. Background technique [0002] Currently used submerged arc welding (including submerged arc surfacing and electroslag surfacing, etc.) is an important welding method, which has the advantages of stable welding quality, high welding productivity, no arc and less smoke, making it a The main welding method in the manufacture of important steel structures such as products and pressure vessels. However, during the welding process, due to the protective effect of welding slag, the heat dissipation of the molten pool is slow, and it is easy to form a coarse columnar grain structure, which increases the cracking...

AI Technical Summary

Problems solved by technology

This kind of magnetic head structure is mostly used for melting electrode gas shielded welding (MAG welding for short), mainly used in the welding of medium and thick plate workpieces, and cannot be used for submerged arc surfacing welding

[0005] (2) "Electromagnetic Stirring Magnetic Head for Twin-wire Submerged Arc Welding Machine" (Patent No.: 201020121334), which is an electromagnetic stirring magnetic head for twin-wire submerged arc welding machine. The magnetic core of the magnetic head is placed in double-wire submerged arc welding Between the two guns of the machine, the structure and volume of the magnetic core are limited by the structure of the welding gun. Its special design structure can only be used for specific double-wire submerged arc welding equipment, and cannot be used for single-wire submerged arc surfacing welding.

[0006] In addition, this electromagnetic stirring head has many coil turns, large volume, and slow heat dissipation, so it can only be used in normal temperature environment, not suitable for submerged arc welding in high temperature environment

Images