A Method for Controlling and Correcting Fillet Weld Deformation of Large Box Structural Parts

Abstract

The invention discloses a method for controlling and correcting the deformation of the fillet weld of a large-scale box body structure, which includes: welding the box body coaming plate through high-energy beam priming, and then filling the bottom welding place through traditional welding Welding; calculate the stress value produced by the weld seam and the area within the preset range in the deformed state, and calculate the stress state produced by the weld seam and the area within the preset range after applying the heat source; determine the required application for self-melting inside the weld seam The first temperature field is applied, and the first temperature field is applied to eliminate the deformation of the middle part of the box enclosure towards the outside of the box; the second temperature field applied to the outer surface of the weld is determined by self-melting, and the second temperature field is applied to use In order to eliminate the deformation of the middle part of the box body towards the box body, this method can effectively ensure the dimensional stability of the box body structural parts, and obviously correct the welding deformation; use finite element calculation methods to study the deformation mechanism of the fillet welds of large box body structural parts, and realize R&D costs are lower and efficiency is higher.

Description

technical field [0001] The invention relates to a method for correcting deformation of fillet welds of large-scale box structure parts, which belongs to the field of welding technology and is mainly used for correcting deformation of welded structures. Background technique [0002] Due to the simple manufacturing process and low cost, large box structural parts have been widely used in various industrial fields. The parts of the box components are mostly connected by welding. For thicker components, due to the high welding heat input, it is difficult to control the welding deformation. In production, once the deformation of the workpiece is out of tolerance, the correction work The workload is even larger than the welding workload, and it is difficult to fully meet the technical requirements of the product after correction. [0003] At present, domestic research on the control of welding deformation of large-scale box structures is mostly focused on heat treatment, mechanic...

AI Technical Summary

Problems solved by technology

The parts of the box components are mostly connected by welding. For thicker components, due to the high welding heat input, it is difficult to control the welding deformation. In production, once the deformation of the workpiece is out of tolerance, the correction work The workload is even greater than the welding workload, and it is difficult to fully meet the technical requirements of the product after correction

[0003] At present, domestic research on the control of welding deformation of large-scale box structures is mostly focused on heat treatment, mechanical orthopedics, etc. The heat treatment process has a better effect on component welding correction, but due to the limitation of the space size of the heat treatment furnace and components, the application of heat treatment technology is relatively limited. , and the cost is higher

Mechanical orthopedic technology mostly uses fixtures during the welding process and applies concentrated loads to local areas after welding to achieve the effect of controlling deformation. The cost advantage of mechanical deformation control technology is very obvious, but the control of deformation accuracy is insufficient

[0004] Welding is a very complex process involving multiple disciplines such as arc physics, heat transfer, metallurgy, and mechanics. If the research on welding deformation relies entirely on experiments, it will directly cause problems such as high R&D costs and low efficiency.

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