Marine thick plate bending process

Abstract

The invention discloses a marine thick plate bending process. Before being processed, a marine thick plate is a flat panel, and after being processed, curvature radius of the middle of the thick plate is required to be small while curvature radius of both ends of the thick plate is required to be large. A sectional cold bending method is utilized and includes firstly, processing the two ends of the marine thick plate through segment moulds; and secondly, processing the middle of the marine thick plate through a pressing mould. Self-made moulds used in the marine thick plate bending process are simple, practical and adjustable, processing and forming requirements on high-intensity thick plates within a large range can be met, curved thick plate products meeting different engineering requirements can be processed on the same pressure load, surface profiles of the processed products are smooth, indentations of the products are shallow, service requirements can be met completely, difficulty in processing of the high-intensity thick plates can be reduced, and production of 5100TEU container vessels can be promoted. In addition, quality defects of obvious indentions, scratches and crush damages caused by high deformation resistance generated in a single pressing process are avoided.

Description

technical field [0001] The invention relates to a process for cold-bending a plate, in particular to a process for bending a thick plate for ships. Background technique [0002] Processing thick marine plates with high strength, anti-deformation ability and complex linear shape has certain restrictions on the selection of forming equipment. The difficulty of construction is: according to the existing equipment of the enterprise, the processing of such parts can not meet the construction conditions, but also the bending force of the equipment can meet the needs of material deformation; The adaptability is not only related to the type, composition and internal structure of the material itself, but also to the mechanical state, deformation speed, boundary conditions and other factors when the material is deformed. Therefore, it is usually necessary to use the pad pressing method. Compared with the conventional construction method, the same force is applied to reduce the effect...

AI Technical Summary

Problems solved by technology

However, adopting this method will generate a greater extrusion force on the compressed part of the workpiece, resulting in more obvious quality defects on the surface of the workpiece: such as indentation, extrusion damage, etc.

With the development of shipbuilding technology, the requirements for dimensional accuracy and appearance quality of products are getting higher and higher. Therefore, it is difficult to ensure the forming quality of products to meet production needs by using pad pressure method on conventional general-purpose molds.

Moreover, it is difficult to obtain a good forming effect for a special mold designed without the support of a large amount of practical data.

Images