A bending die for a ship mast house segmented wave-shaped plate and a design method thereof

By designing a bending mold for corrugated plates in ship mast sections and adopting an optimized upper and lower mold structure and parametric design, the problem of integrated pressing of corrugated plates in ship manufacturing was solved, achieving high-precision, low-cost, and green manufacturing results.

CN122425110APending Publication Date: 2026-07-21CHENGXI SHIPYARD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGXI SHIPYARD
Filing Date
2026-03-21
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In existing ship designs, corrugated plate molds cannot meet the requirements of high precision and high efficiency in integrated pressing, resulting in problems such as warping and wave deformation of thin plates during the welding of reinforcing ribs. Furthermore, the lack of dedicated parametric optimization molds affects production efficiency and quality.

Method used

A bending die for a section of corrugated plate in a ship masthouse is designed. The upper and lower dies cooperate with each other. The forming groove of the lower die includes a main load-bearing arc, a stress transition arc, and a straight line segment. By optimizing the coefficients α and β to control the material flow, the stress gradient is ensured to be gentle. Combined with the tangential combination of "main arc-transition arc-straight line", a gradient deformation field is formed to suppress defects.

Benefits of technology

It achieves integrated pressing of corrugated boards with precision control within ±1mm, increases production efficiency by dozens of times, avoids thermal processing damage, reduces costs, and realizes green manufacturing.

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Abstract

The application discloses a ship mast segmented wave-shaped plate bending die and a design method thereof. The die comprises an upper die and a lower die matched with each other, and the lower die is provided with a forming groove. The key lies in that the cross-section profile of the groove adopts a three-section tangent geometry configuration composed of a main bearing circular arc, two symmetric stress transition circular arcs and a straight line segment, and a series of optimization mathematical models between the circular arc radii Rc and Rt and the plate thickness t are established. The method determines the optimal Rc, Rt and D values through an optimization algorithm according to the plate parameters and performance requirements. Through the precise geometric design, the method realizes the gradient gentle transition of material stress in the pressing process, effectively suppresses the wrinkling, cracking and springback of the thin plate during the bending, realizes the 'one-step pressing' of the large thin-walled wave-shaped plate, has high machining precision (±1mm), significantly improves the efficiency, avoids the problems of high cost, large deformation and long cycle caused by traditional welding or outsourcing processing, and has good universality and generalizability.
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