Four-section jump welding method

Abstract

The invention relates to a four-section wandering welding method. In the process of welding a weld seam in each layer of butt weld seams of slabs, firstly, the two slabs on which butt welding needs to be conducted are stably placed, the welding direction is from the starting point of one end of the weld seam to the end point of the other end of the weld seam, the weld seam is divided into four sections from the starting point to the end point, the four sections sequentially include the first section, the second section, the third section and the fourth section, the end, close to the starting point of the weld seam, of each section is the staring point end, the end, close to the end point of the weld seam, of each section is the end point end, the direction for welding each section of the weld seam is from the starting point end of the section to the end point end of the section, and welding of the weld seam is conducted on the fourth section, the second section, the first section and the third section in sequence; the first section, the second section and the third section are the same in length, and the length of the fourth section is half of the length of the first section; when a weld seam in a higher layer of the butt weld seams of the slabs is welded, the sections of each layer need to be staggered by more than 50mm. According to the method, welding deformation is very small, manufacturing cost is greatly reduced, efficiency is improved, and the service life of components or equipment is effectively prolonged.

Description

technical field [0001] The invention relates to a jump welding method, specifically a four-section segmented jump welding method. Background technique [0002] Because the weld seam is heated during welding, the weld seam returns to normal temperature after welding. In this process, due to the principle of thermal expansion and contraction, deformation will generally occur after welding. The amount of deformation is related to the welding position, welding speed, and weld heat. speed matters. During the welding process, the actual weld is changed from liquid metal to solid metal. Although the metal will expand when heated, because the filled metal is close to liquid, although the base metal will expand, the temperature of the base metal is lower than that of the weld. seam temperature. The weld metal is filled into the weld bead by arc blowing force and gravity. If the temperature of the weld bead metal remains unchanged, the weld seam will expand slightly during actual we...

AI Technical Summary

Problems solved by technology

However, none of these traditional welding methods can make the deformation of the weldment smaller, and often produce deformation states or other complex forms of deformation, which makes it very difficult to assemble components in the next process; if the assembly is forced, a large amount of residual stress will be If it remains in the component, it will be a fatal hidden danger for the base material with poor crack resistance

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