Process for installing and positioning double-rudder sleeve and tail casting in segmented construction stage

Abstract

The invention discloses a process for installing and positioning a double-rudder sleeve and a tail casting in a segmented construction stage, which aims to provide theoretical support for the scheme on the premise that the overall precision level of the existing ship construction is greatly improved, the tail end surface of the FR8 assembly tail casting is not processed, namely, the tail end surface is fixed, and a small amount of deviation of the center line of a tail shaft can be adjusted by epoxy. According to the scheme, the purpose of segmented division is that the rudder sleeve is installed in place in the segmented construction stage, the rudder sleeve does not need to be hoisted in the later carrying stage, and the trouble of high-altitude operation is avoided; the distance between the tail end face and the central rib positions of the two rudderstocks is determined in the segmented construction stage, and all other works in the later stage do not affect the size, so that the time for positioning and secondary precise control in the later carrying stage is shortened, the corresponding high-altitude operation is reduced, and the construction safety is improved; paint damage and repair are reduced, multiple positions in the tail area are narrow in the position space and difficult in construction, and construction safety is greatly improved.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a technology for installing and positioning double rudder sleeves and stern castings in a segmented construction stage. Background technique [0002] The rudder sleeve is associated with the rudder system, and the tail casting segments are associated with the shaft system. Under normal circumstances, due to the accuracy deviation in the stages of ship construction, general assembly, loading, etc., and the accuracy requirements of the rudder system and shaft system are the highest in ship construction, usually at the millimeter level, so in order to ensure accuracy, Reduce the impact caused by the accumulation of precision deviations in segmented construction, general assembly, loading, etc., and the segment with tail casting and the segment with rudder system are usually divided into two segments, and they are hung separately. The rudder sleeve It is a separate hoisting during the...

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Problems solved by technology

[0003] 1. During the loading stage, the ship is in a normal state, and the rudder sleeve is installed at a high altitude. It takes a long time to hoist and position, and requires a lot of scaffolding. It is difficult to control precisely. It can be installed after positioning, which adds a lot of overhead welding work. The whole process belongs to high-altitude operations, which has poor safety and difficult construction;

[0004] 2. In the loading stage, the paint for the sections has been completely finished, and the construction at this time will definitely damage the paint, and the space of the relevant position is small, the construction difficulty of later grinding and paint repair will increase, and the corresponding safety will be reduced;

[0005] 3. Delaying a lot of work to the loading stage increases the workload of the loading stage, which does not conform to the general trend of process advancement such as improving the integrity of the pre-outfitting of the sections, improving the integrity of the painting of the sections, and improving the precise control level of the construction of the sections. ;

[0006] 4. Divide assembly 1 and assembly 2 into two sub-constructions, and hang them together in the loading stage, so that the distance between the center line of the rudder sleeve and the end face of the tail casting, and the deviation correction between the center point of the two rudder sleeves and the tail shaft must be corrected. During the loading stage, it is a high-altitude operation at this time, and precise control operations such as segmented assembly and positioning are difficult, and require the cooperation of scaffolders. The scaffolders at this position cannot set up the unit in advance, and there will inevitably be problems with scaffolding. In Maban After positioning, it is still necessary to pay close attention to the impact of subsequent electric welding on the overall accuracy, and re-measurement is required, which is time-consuming and laborious

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