Deformation control method in production for aluminum alloy ship body section

Abstract

The invention relates to a deformation control method in production for an aluminum alloy ship body section. In the three specific steps of assembling, welding and hoisting for the ship body section,aggregates are fixed to aluminum alloy plates through spot welding and by reasonably arranging an assembling sequence, a gap with a certain width is reserved among the aluminum alloy plate instead ofwelding, so that shrinkage allowance is reserved in the subsequent welding step, and the generation of deformation can be effectively avoided; meanwhile, 1-2 aggregates are reserved in assembling forthe aggregates, and assembled and welded after the welding step is completed, so that the deformation of the aluminum alloy plates in the welding process can be effectively suppressed; and in addition, the welding sequence in the welding step is further reasonably arranged, and the transversal span distribution and the longitudinal span distribution of the ship body section are adequately utilizedthrough the welding sequence of longitudinally welding at first, and then transversally welding, and the method of skip welding for the ship body section, so that the generation of the deformation iseffectively avoided, lots of correction operation is avoided, the engineering efficiency is effectively increased, and the construction period is shortened.

Description

technical field [0001] The invention relates to the field of ship component installation and welding technology, in particular to a deformation control method in the segmental fabrication of an aluminum alloy hull. Background technique [0002] Aluminum alloy sheets are widely used on cruise ships, and because of their light weight, they will also be used on the bridge of some ships, especially in the construction of large-area hull segments for new cruise superstructures. 3-6mm aluminum alloy sheets are more and more widely used in the living quarters and bridges of ships, especially cruise passenger ships use a large number of aluminum alloy sheets as the main structure of the superstructure. [0003] Due to the small thickness of the thin plate, it is prone to deformation during welding, mainly wave deformation and twisting deformation, which makes it very difficult to correct the deformation of the thin plate. For aluminum alloy sheets, due to the large expansion coeffi...

AI Technical Summary

Problems solved by technology

In the prior art, it is usually necessary to rectify after deformation. The basic rectification method includes thermal rectification. First, the deformed plate is heated locally with flame, and then cooled with water, so that stress is generated during the cold shrinkage process, so as to achieve the effect of rectifying the deformation. For the aluminum alloy plate, due to its fast heat conduction and small shrinkage, it is difficult to correct the deformation of the aluminum alloy plate

Images