Welding deformation control method of large thick-wall box body component

Abstract

The invention relates to a welding deformation control method of a large thick-wall box body component. The method comprises following five steps: firstly, before welding, an assembly reference platform is prefabricated on the welding side of a box body plate, and the influence of warping or the uneven wall thickness of the box body plate on the welding gap is removed; secondly, before welding, a welding groove is designed to be of a double-angle V-shaped structure, and the welding line metal filling amount and the welding heat input amount in the subsequent welding process can be reduced; thirdly, during pre-welding assembly, a flexible welding deformation control tool is prefabricated in a box body; fourthly, in the welding process, welding lines on the two sides of a transverse plate of the same box body are subject to symmetric welding application at the same time; and fifthly, in the welding process, according to the transverse shrinkage amount of the welding lines of the box body, the transverse elongation amount of the flexible welding deformation control tool is adjusted to control the transverse opening size of an inner cavity of the box body component, and further, the bending deformation amount of a box body vertical plate is controlled. Finally, the welding deformation control method can effectively control the welding deformation amount of the large thick-wall box body component.

Description

[0001] technical field [0002] The invention relates to a method for controlling the welding deformation of a large thick-walled box member in gas shielded gas shielded welding. Background technique [0003] Large thick-walled box components are welded by two horizontal plates and two vertical plates, and are widely used in nuclear power, aerospace, ships and other fields. Generally speaking, the welding deformation allowed for large thick-walled box components is small, such as the superconducting feeder system (Feeder), which is made of 40mm thick stainless steel plates and has an overall size of 8m×1.9m×1.5m Rectangular box components require that the overall bending deformation of the box plate after welding does not exceed 5mm. [0004] At present, the welding seam form of gas metal shielded welding of large thick-walled box members is generally a corner butt weld, and due to the limited welding space inside the box member, the welding groove form is generally one-...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of outward bending of the box plate of the large thick-walled box member after MIGA welding, the present invention provides a method for controlling the welding deformation of the large thick-walled box member, which can reduce the deformation of the large thick-walled box member Welding deformation during MIG welding

Images