Method and device for controlling prestressed deformation of aluminum thin-walled hull vertical weld

Abstract

The invention discloses a method and a device for controlling the prestressed deformation of the vertical weld seam of an aluminum thin-walled hull. The deformation control device includes a main structure and a pre-tension stress applying structure, the main structure includes a top frame, a movable force applying device and a plurality of columns, and the movable force applying device is movably arranged in the middle of the top frame The movable force application device includes a middle beam crane and two side beam hangers, a movable pulley is arranged under the middle beam crane; the pre-tension stress applying structure is arranged under the movable pulley, the pre-tension stress The force application structure includes steel splints and arc receiving plates set from top to bottom. The deformation control method is a method of performing deformation control using the above-mentioned deformation control device. The invention is suitable for the vertical butt weld welding of the cabin of the ship hull, and solves a series of problems such as large vertical welding deformation of the hull cabin and large welding deformation due to insufficient rigid constraints.

Description

technical field [0001] The invention belongs to the technical field of ship assembly and welding, and in particular relates to a method and a device for controlling prestressed deformation of vertical welds of aluminum thin-walled hulls. Background technique [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 in turn 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 met...

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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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