I. The Core Principle of Submerged Arc Welding
Submerged arc welding is a welding method that achieves connection by having an electric arc burn beneath a granular flux layer. During the welding process, the welding wire and the workpiece are respectively connected to the power supply's two poles. The electric arc generates high temperature under the cover of the flux, causing the welding wire, base metal, and flux to melt. The molten metal forms a molten pool, while the flux turns into slag. Together, they isolate the air and protect the molten pool from contamination. The welding wire needs to be continuously fed to maintain the stability of the arc. The vapor formed by the molten flux and the slag constitute a dual protective barrier, ensuring that the welding process is carried out in an environment free from air interference, laying the foundation for high-quality weld seams.
II. Key Characteristics of Submerged Arc Welding
The advantages of submerged arc welding are mainly reflected in efficiency and quality. It uses a large current for welding, with concentrated heat and strong penetration. The welding speed is 5 to 10 times faster than manual welding, significantly improving production efficiency. The protective effect of the flux is excellent, and the welding specifications can be automatically controlled. The weld seam has uniform composition and a beautiful shape, and the quality stability far exceeds manual operation. At the same time, the electric arc is hidden under the flux, without arc light hazards, less smoke, and improves working conditions.
III. Application Areas of Submerged Arc Welding
Due to its efficient and stable characteristics, submerged arc welding is indispensable in heavy industry. The shipbuilding industry uses it to weld ship structures, and pressure vessel manufacturing relies on it to ensure sealing safety. Moreover, in the welding of large structural components in fields such as metallurgical machinery and marine engineering, submerged arc welding plays a core role.
In welding operations, auxiliary equipment is equally crucial. The patented product of Taian Xutai Machinery - the wire feeding machine arm, brings numerous conveniences to the welding work. It installs the scattered and piled-up wire feeding machines, cables, etc. on the rotating arm. During operation, it can freely and smoothly swing within the welding range (three-dimensional space) as per the user's requirements. This not only enhances the on-site management level of the enterprise, making the workshop cleaner and more orderly, but also facilitates the operators to change the welding position, improving work efficiency. When used in combination with submerged arc welding, it further optimizes the welding operation process and contributes to the development of the welding industry.
