Forming process of ultra-large marine flange

Abstract

The invention relates to a forming process of an ultra-large marine flange, which is characterized in that the ultra-large marine flange is formed by tailor welding in a manner of blanking in sections and assembling in sections, the welding deformation quantity is reduced by a welding deformation prevention tool in the welding process, and the welding stress is released by a post-treatment process subsequently. And it is ensured that the ultra-large marine flange formed through tailor welding meets the requirements of design drawings. Thus, on one hand, the requirement for machining conditions can be effectively lowered, and a large-size discharging steel plate, a large-machining-capacity discharging cutting device and a large discharging site do not need to be matched for manufacturing the ultra-large marine flange; on the other hand, the flange for the ultra-large ship does not need to be turned over in the whole welding process, and time and labor are saved; and on the other hand, through strict process control in manufacturing and forming, it can be effectively ensured that the formed ultra-large type marine flange has good size precision and shape precision, and smooth implementation of follow-up machining and assembling work of the ultra-large type marine flange is facilitated.

Description

technical field [0001] The invention relates to the technical field of flange welding and forming, in particular to a forming process of super-large marine flanges. Background technique [0002] The 3200T self-elevating wind power installation vessel of the European shipowner company undertaken by COSCO SHIPPING is specially designed for the integration of transportation, hoisting and installation of offshore wind turbines, connectors and bases. Unlike traditional jack-up wind power installation vessels, this vessel is more maneuverable. In addition to being able to carry various types of offshore wind turbines and bases, the larger unobstructed deck can also improve the efficiency of offshore installations, while reducing energy consumption and greenhouse gas emissions. The ship will not only provide equipment support for the sustainable development of the offshore green and clean energy industry, but also be used for the dismantling and transportation of offshore structur...

AI Technical Summary

Problems solved by technology

The above molding process is far from meeting the manufacturing requirements of super large marine flanges with an outer diameter exceeding 20m

In addition, according to public information, foreign shipyards in the same industry have developed segmental blanking and segmented butt-welding processes for super-large marine flanges (public reports, a South Korean shipyard used segmental tailor-welding processes to manufacture and form However, it lacks effective welding deformation control means, and the welding deformation is extremely large in the actual implementation process, which requires a lot of manpower and material resources to correct the shape; the residual stress after welding is relatively large. Large, which leads to secondary deformation of super-large marine flanges due to stress release in the later processing stage, which makes subsequent machining difficult and is not conducive to the control of final machining accuracy

In addition, in order to ensure that the welding torch can reach the welding area smoothly, it is necessary to frequently turn over the welding marine flange during the welding process, which is time-consuming and laborious, and it is very easy to cause deformation due to the lifting force. Thereby, it is urgent for technicians to solve the above problems

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