LNG ship double-layer bottom subsection division design method for intelligent manufacturing

Abstract

The invention discloses an LNG ship double-layer bottom subsection division design method for intelligent manufacturing. The method specifically comprises the following steps: dividing double-layer bottom subsections into an inner bottom plate middle assemblage and an outer bottom plate middle assemblage; dividing the outer bottom plate middle assemblage into an outer plate secondary middle assemblage, a first longitudinal girder small assemblage, a second longitudinal girder small assemblage, a first rib plate small assemblage, a simple small assemblage and a longitudinal girder combined small assemblage; dividing the first small longitudinal girder assemblage into a third small longitudinal girder assemblage and a second small rib plate assemblage; compiling logistics codes for the assembled intermediate products respectively, and inputting the logistics codes into a workshop manufacturing execution system. The double-layer bottom is divided into a plurality of small assemblage, middle assemblage and other assemblage intermediate products in a segmented mode, the assemblage intermediate products can be manufactured synchronously, the construction quality and the construction efficiency of the assemblage intermediate products can be improved, and therefore the construction quality and the construction efficiency of a ship are improved.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a design method for segmented division of the double bottom of an LNG ship oriented to intelligent manufacturing. Background technique [0002] LNG ship is a high-tech, high-difficulty, and high-value-added "three-high" product. With the rapid development of the shipbuilding industry, my country has entered the main battlefield of direct competition with Japanese and Korean shipbuilding companies in the field of LNG ship construction. However, compared with Japanese and South Korean companies, there is still a relatively large gap in the construction quality and construction efficiency of my country's LNG ships. As the country proposes the strategy of intelligent manufacturing, the implementation of intelligent shipbuilding in the shipbuilding industry has become a necessary means for the high-quality and efficient development of my country's shipbuilding industry and the imp...

AI Technical Summary

Problems solved by technology

[0004] First, during the division of the double bottom of conventional LNG ships, the inner bottom plate and the outer bottom plate are not assembled, but the inner bottom plate and the outer bottom plate are semi-automatically welded directly on the tire frame with the panel and longitudinal

On the one hand, this division method cannot improve the welding efficiency. On the other hand, it is not conducive to improving the welding quality between the plate and the frame. The thermal deformation is large, and the flatness of the sections cannot be guaranteed, which seriously affects the subsequent construction of the enclosure system. Installation of insulating box base and insulating box in process

[0005] Second, in the process of segmenting the double bottom of conventional LNG ships, a series of sub-groups such as longitudinal truss groups are not formed, but the parts are directly hoisted to the sub-manufacturing tire positions for overall welding construction

This division method is not conducive to the full spread of the work surface, and is not conducive to improving the construction efficiency of the sections. On the other hand, because there is no division of a series of sub-groups such as the girder group, the sub-assembly and welding operations are concentrated in one area. , it is easy to cause welding deformation, which increases the difficulty of precision control and increases the loss of reinforcement materials, which is not conducive to improving the manufacturing accuracy of segments

[0006] Third, the type and size division of assembly is not applicable to intelligent manufacturing equipment, because intelligent manufacturing equipment has clear size and specification requirements for different small, medium, and large assemblies

The type and size of the current LNG ship's double-bottom division cannot fully meet the needs of intelligent manufacturing equipment, resulting in a large number of assembled intermediate products that cannot be constructed with intelligent manufacturing equipment, thus affecting the construction efficiency and construction of ships. Quality, and the capacity of intelligent manufacturing equipment is not fully utilized, which increases labor costs and investment in quality management

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