Curved Building Panel Segmentation for Longitudinal Bending
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Solution Overview
Problem
Conventional methods for forming curved building panels from sheet materials, such as galvanized steel, often result in weakened panels due to transverse corrugations, which also lead to aesthetic issues and loss of protective coatings, and attempting to curve panels without corrugations can cause buckling, reducing strength.
Innovation Solution
A building panel system that curves in the longitudinal direction without transverse corrugations, using a panel curving apparatus with multiple rollers and a control system to adjust the relative orientation of curving assemblies, allowing for a depth increase in specific segments to accommodate the curve, thereby maintaining panel strength and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If transverse corrugations are imparted into the building panel to form a longitudinal curve, then the panel can be curved along its length, but the panel strength is significantly weakened and protective coatings are lost
Solution Approach 1:
The building panel is divided into multiple longitudinal segments (first, second, third segments) that can be independently deformed. The first and third segments are increased in depth while the second segment maintains original depth, allowing the panel to curve longitudinally through segmental deformation rather than transverse corrugations. This segmentation enables curvature while preserving overall panel strength.
Solution Approach 2:
Different portions of the panel are given different properties: the first and third longitudinal segments are increased in depth to provide structural support and accommodate curvature, while the second longitudinal segment maintains its original depth. This local differentiation allows the panel to achieve longitudinal curvature without compromising overall strength, as the deeper segments provide the necessary structural integrity.
2Shape
If transverse corrugations are imparted into the building panel to form a longitudinal curve, then the panel can be curved along its length, but the aesthetic appearance is degraded and protective coatings are lost
Solution Approach 1:
The panel is segmented into multiple longitudinal portions that are differentially deformed. By increasing the depth of specific segments (first and third segments) while maintaining the original depth of other segments (second segment), the panel achieves a smooth longitudinal curve without the visual disruption of transverse corrugations. This segmentation approach preserves the aesthetic appearance and protective coatings while enabling curvature.
Solution Approach 2:
Instead of creating curvature through transverse corrugations (adding complexity in the transverse dimension), the invention achieves longitudinal curvature by modifying the depth dimension of specific longitudinal segments. This dimensional approach allows the panel to curve along its length while maintaining a smooth surface appearance and preserving protective coatings.
3Object-affected harmful factors
If the panel is curved in the longitudinal direction without transverse corrugations, then aesthetic appearance and coating integrity are maintained, but buckling occurs and strength is reduced
Solution Approach 1:
The panel employs local quality differentiation where specific longitudinal segments (first and third segments) are increased in depth to provide localized structural support. This allows the panel to curve longitudinally without transverse corrugations, maintaining aesthetic appearance and coating integrity, while the deeper segments prevent buckling and maintain overall panel strength.
Solution Approach 2:
The panel is divided into multiple longitudinal segments with different depth characteristics. The first and third segments are increased in depth to act as structural stiffeners that prevent buckling during longitudinal curvature, while the second segment maintains original depth. This segmentation enables the panel to achieve curvature without transverse corrugations while maintaining both aesthetics and strength.
4Ease of manufacture
If conventional transverse corrugations are used to curve the panel, then manufacturing is simpler, but the unsupported span width is limited
Solution Approach 1:
The panel uses local quality differentiation by increasing the depth of specific longitudinal segments (first and third segments) while maintaining the original depth of other segments. This creates a curved profile with enhanced structural capacity that can support wider spans without additional framing, while still using conventional rolling manufacturing processes.
Solution Approach 2:
The panel is segmented into multiple longitudinal portions with different depth characteristics. By increasing the depth of alternating segments, the panel achieves a curved profile that provides structural support for wider unsupported spans. This segmented approach allows the panel to span greater distances without requiring transverse corrugations or additional support structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the creation of stronger, aesthetically pleasing curved building panels with increased unsupported span widths, avoiding the weaknesses and aesthetic issues associated with transverse corrugations, while maintaining structural integrity.
Implementation Method 1
The multiple first rollers and multiple second rollers are arranged so as to cause an increase in a depth of a particular segment of the plurality of segments of the building panel to accommodate the formation of a longitudinal curve in the building panel
Data Source
AI summary
A building panel formed from sheet material extends in a longitudinal direction along its length and includes a curved center portion in cross section, a pair of side portions extending from the curved center portion, and a pair of connecting portions extending from the side portions. The curved center portion includes a plurality segments extending in the longitudinal direction. The panel is curved in the longitudinal direction without having transverse corrugations. A particular segment may have a depth greater than that of another segment to accommodate the longitudinal curve. A system for longitudinally curving the panel includes first and second curving assemblies, each of which includes multiple rollers arranged to contact the panel as it passes along, a positioning mechanism for changing a relative rotational orientation between the first and second curving assemblies, a drive system for moving the panel longitudinally, and a control system for controlling the positioning mechanism.