Large tank singe-face-weld double-face-forming method and weld joint forming pad

Abstract

The invention provides a large tank singe-face-weld double-face-forming method, which comprises arranging a weld joint forming pad on the back face of a weld joint of a weld part, wherein the weld joint forming pad is provided with a weld joint forming groove with the shape matched with that of the weld joint; fixedly and tightly attaching the weld joint forming pad on the back face of the weld joint to enable the center of the weld joint to align at the center of the weld joint forming groove; welding the front face of the weld joint; using large weld current for weld penetration of a weld part at one step; and enabling a weld puddle to be cooled and solidified on the weld joint forming groove. Compared with a traditional double-face-weld method, the weld joint is formed by one step, weld quality is better, production efficiency is improved, and production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of large tank body welding, in particular to a large tank body single-side welding double-side forming method and a weld seam forming liner suitable for the large tank body single-side welding double-side forming method. Background technique [0002] Welding technology plays an important role in the metal processing and manufacturing industry. Welding refers to the method of combining the workpieces by heating or pressing, or both, and possibly using filler materials. It is a local rapid heating and cooling process. In the modern metal processing and manufacturing industry, welding developed later than casting and forging processes, but the development speed is very fast. So far, there are more than 40 metal welding methods, mainly including fusion welding, pressure welding and brazing. Among them, fusion welding is the most important type. Fusion welding is a method of heating the workpiece interface to a ...

AI Technical Summary

Problems solved by technology

In the current widely used arc welding process, the traditional double-sided welding is mostly used, which generally includes several processes such as front welding, workpiece turning, root cleaning and grinding, and reverse welding. There are many processes and require high technical level of workers. Easy to produce defects such as carburization, slag inclusion and burn-through

Large tanks, especially large storage tanks used in the glass fiber production industry, are generally rolled and welded by 8-20mm carbon steel plates. The diameter of the storage tank is generally more than 4 meters, and traditional double-sided welding is adopted. process, there are problems of low weld quality, high cost and low efficiency

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