Split and current collecting interactive assembly manufacturing method for LNG marine polyurethane insulation box

Abstract

The invention relates to a split and current collecting interactive assembly manufacturing method for LNG marine polyurethane insulation box; and the method comprises the following steps of: a code scanning process, a loading process, an automatic gluing process, a bottom component assembly process, a wood splint assembly gluing process, a wood plywood assembly process, an underlayer tensioner assembly process, an upper component assembly process, an upper tensioner assembly process, an overall calibration process, a plywood correction process, a top film coating process and a post-treatment process. Compared with the prior art, the invention makes full use of the existing automation equipment, adopts the split and current collecting interactive assembly manufacturing ideas, sets the parallel material transportation mode of the double conveying line, and the multi-station segment assembly method; the influence of the single linear arrangement on the production system due to equipment failure is greatly reduced; the manufacturing method not only reduces equipment investment and the occupied area of a production site, but also effectively balances the operation time of each process,improves production efficiency, and ensures high-precision quality requirement.

Description

technical field [0001] The invention belongs to the technical field of liquefied natural gas ships, and relates to a flow diverting and collecting interactive assembly and manufacturing method of polyurethane insulating boxes for LNG ships. Background technique [0002] The insulation box is an important part to ensure that the liquid cargo tank in the liquid cargo containment system of a large liquefied natural gas (LNG) ship is at an ultra-low temperature of -163°C. The reinforced polyurethane standard insulation box is the original expanded perlite Or the improved form of glass wool filled insulation box, which is composed of rigid polyurethane foam board and plywood after glued assembly and pressing, which can effectively reduce the daily evaporation rate of LNG ship. Core components. In the NO.96 containment system, reinforced polyurethane standard insulation boxes include L03, L03+ and other forms, and a film-type LNG ship with NO.96 containment system needs 20,000 N0...

AI Technical Summary

Problems solved by technology

The existing manufacturing method is that after the plywood or polyurethane foam board is automatically glued, the off-line method is adopted, and the manual or semi-automatic spreader is stacked layer by layer and placed on the corresponding assembly table for assembly, and it is inevitable that there will be misalignment between layers.

[0006] (2) Manual assembly of wooden splints, poor quality stability

For the NO.96L03 / L03+ series insulation box, the four sides of the special wooden plywood (Cleat) need to be connected with polyurethane and plywood by gluing. The solid method is used for subsequent aging curing, resulting in uneven stress on the splint, and the connection strength and assembly accuracy are not up to standard

[0007] (3) The process lacks flexibility

Most of the existing technologies adopt the layout form of "straight-line conveying and single-station assembly". After the plywood or polyurethane board is glued, it is sent to the assembly station through the conveying line, and the assembly and fastening of the four wooden splints are performed at the assembly station. It is completed by manual operation. In addition to poor quality stability, this method will also disturb the overall beat of the entire production system due to accidental factors of manual operation, resulting in a backlog of parts to be assembled on the assembly line, which seriously affects production efficiency.

[0008] (4) There are defects in the quality control and traceability of the manufacturing process

Since all the outer surfaces of the reinforced polyurethane standard insulation box have to be processed after aging, the original methods such as spraying codes or barcode pasting cannot be applied to the manufacturing process of the reinforced polyurethane standard insulation box; in addition, the reinforced polyurethane standard insulation box Most of them are large-scale workpieces processed in three dimensions. The manual detection method adopted by the existing technology is difficult to meet the requirements of multi-model and large-scale detection, which affects the normal operation of the quality control system and easily causes quality monitoring and traceability in the manufacturing process. out of control

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