A Method for Installing Curved Longitudinals

Abstract

The invention discloses a hook face longitudinal installation method. The method includes the steps that firstly, shell plates (11) are sequentially laid, and structural faces used for connection are upward; secondly, a longitudinal line is drawn with the vertex of the first column of shell plates as the null point; thirdly, lineation is conducted on all columns of plates in the same mode in the second step, and then an overall lower plate opening value (13) is determined; fourthly, the vertex of the lower end of the lowest shell plate (11) serves as a lineation zero point, and the second step and the third step are repeated from bottom to top so as to verify accuracy of rib numbers; fifthly, longitudinals (12) are nailed on the shell plates according to the longitudinal lines, a longitudinal dip angle is formed between each shell plate and the corresponding longitudinal on each longitudinal installation line (4), and the angles need to be consistent with longitudinal through hole angles (14); sixthly, a grillage obtained in the fifth step is turned over and welded to a middle assembly structure, and flatness of the shell plates is ensured. The method guarantees assembly precision and welding quality, prevents the situation that shell plates are always short due to welding shrinkage in the longitudinal welding process, reduces cost loss, guarantees health of staff, and improves overall efficiency.

Description

technical field [0001] The invention relates to the field of ship manufacturing technology, more specifically, relates to the installation process of the longitudinal frame of the outer plate of the bilge part of the ship. Background technique [0002] As the world shipping market continues to slump, the competition in the shipbuilding market has become more intense. Improving work efficiency, reducing the difficulty of welder construction, reducing the technical level of welders, controlling the accuracy error of steel plates, improving labor, site, environment, and efficiency, and reducing shipbuilding costs are a major focus of ship construction. [0003] Due to the structural characteristics of container ships, the cargo hold is in a stepped shape, such as Figure 11 As shown, the linear curvature of the outer plate 11 is large, the distribution area is wide, and the angle change of the longitudinal bone 12 is large. The routine construction of the sections is done in a...

AI Technical Summary

Problems solved by technology

[0005] 1. The welding of the outer plate and the longitudinal bone is face-up welding, which has high requirements for welders, and it is difficult to guarantee the assembly accuracy and welding quality

[0006] 2. The outer plate, the floor plate and the platform plate form a cabin, and the working environment in the cabin is harsh and the efficiency is low

[0007] 3. Since there is no margin in the processing of the outer plate, the outer plate is often short due to welding shrinkage during the welding process of the longitudinal bone

[0008] However, if the outer panel is used as a tire, a lot of labor will be wasted in the manufacture of the tire frame, and the structure will be staggered, making assembly difficult. What’s more, the accuracy of the container device cannot be tested, which will bring great hidden dangers to the subsequent closure, so it cannot be used.

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