Fillet weld welding structure for K-type grooves of moderately-thick plate without back chipping and welding technology of fillet weld welding structure

Abstract

The invention relates to a fillet weld welding structure for K-type grooves of a moderately-thick plate without back chipping and a welding technology of the fillet weld welding structure. The fillet weld welding structure is characterized in that symmetric grooves are formed in the two sides of a web plate, the web plate and a bottom plate are tightly attached when assembled in welding, and no gap is reserved when the web plate and the bottom plate are assembled; the grooves of the web plate are machined through a milling machine, no truncated edge is reserved, and the length parts between the two ends in the grooves are fixed at equal diversion points and polished; a welding robot is used for stably welding a welding bead at the position of ship-type welding, welding is carried out alternatively on the two sides in a multi-layer and multi-run manner, back chipping is not carried out on the back face, and slag is not removed in the bead; and the backward deformation theory is utilized in the assembling process, and double-face alternating welding is adopted in the welding process to restrain deformation. By means of the technology, full penetration of the fillet weld below the K-type grooves of the moderately-thick plate is ensured, and the welding quality is improved; and meanwhile, the welding automation degree and the production efficiency are obviously improved, and the welding construction environment is improved.

Description

technical field [0001] The invention relates to the technical field of welding technology, in particular to a welding process for full penetration of fillet welds of medium and thick plates, and in particular to an automatic gas shielded welding process for full penetration of fillet welds with K-shaped grooves and unclear roots. Background technique [0002] When facing the problem of full penetration of fillet welds of medium and thick plates, most domestic manufacturers often adopt the construction technology of back gouging and root cleaning method, that is, before welding the back weld, the welding groove should be cleaned until the front weld can be seen , the work efficiency is very low, the cost is high and the construction work environment pollution is serious. There have been a number of related technologies and patents to solve such problems, but most of them use submerged arc welding to increase the welding current or weld both sides of the fillet weld simultaneo...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an improved fillet weld welding structure and welding process of medium and thick plate K-shaped groove with unclear roots, which can overcome the need to clean the welding groove in the prior art until the front weld seam is seen , the work efficiency is very low, the cost is high and the construction work environment pollution is serious.

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