Aluminous thin-wall hull vertical welding seam prestress deformation control method and device

Abstract

The invention discloses an aluminous thin-wall hull vertical welding seam prestress deformation control method and device. The deformation control device comprises a main body structure and a prestretching stress application structure. The main body structure comprises a top frame, a movable application device and a plurality of upright columns. The movable application device is movably arranged in the middle of the top frame. The movable application device comprises a middle lifting beam and two side lifting beam sets. A movable pulley is arranged under the middle lifting beam. The prestretching stress application structure is arranged below the movable pulley. The prestretching stress application structure comprises a steel clamping plate and a run-off plate which are arranged from top to bottom. The deformation control method conducts deformation control by using the deformation control device. The aluminous thin-wall hull vertical welding seam prestress deformation control method and device are suitable for cabin vertical butt welding seam welding of hull building, and a range of problems that welding deformation is large due to the fact that the hull cabin vertical welding deformation is large and the rigid restraint is insufficient are solved.

Description

Technical field [0001] The invention belongs to the technical field of ship assembling and welding, and specifically relates to a method and a device for controlling the prestress deformation of the vertical weld of an aluminum thin-walled hull. Background technique [0002] The cabins of high-speed aluminum ships are mainly welded with 3~5mm thick aluminum alloy thin-walled structures. Because aluminum alloys have low elastic modulus and yield strength at temperatures above 200 to 300 degrees Celsius, they have poor deformation resistance; and aluminum alloys The thermal conductivity and thermal expansion coefficient of the material are large, the welding high temperature zone is wide, and the welding stress and deformation are relatively large, which in turn leads to large deformation of the hull cabin of the vertical butt weld. In order to solve the above problems, in actual production, methods such as reinforced angle aluminum and horizontal arrangement are used to constrain,...

AI Technical Summary

Problems solved by technology

[0002] The cabins of high-speed aluminum ships are mainly welded with thin-walled aluminum alloys with a thickness of 3 to 5 mm. Because the elastic modulus and yield strength of aluminum alloys are small at temperatures above 200 to 300 degrees Celsius, the deformation resistance is poor; The thermal conductivity and thermal expansion coefficient of the material are large, the welding high temperature zone is wide, and the welding stress and deformation are relatively large, which leads to large deformation of the hull compartment of the vertical butt weld

In order to solve the above problems, methods such as reinforced angle aluminum and horizontal row are used in actual production to constrain, but this method cannot effectively restrain the longitudinal shrinkage of the vertical welds in the cabin, nor can it reduce the residual stress level in the welded joints of the cabin. After the angle aluminum, horizontal row, etc. are removed, the deformation will appear again

After a lot of field practice, it is found that once the welding deformation of the panel cabin occurs, subsequent correction is very difficult

Not only was a lot of manpower and material resources wasted, but the construction efficiency was reduced; at the same time, due to the welding and removal of reinforced angle aluminum and horizontal rows, it would damage the surface quality of the cabin, reduce the corrosion resistance of the hull, and reduce production efficiency

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