Composite Panel Manufacturing with Preliminary Machining
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Solution Overview
Problem
Conventional production processes for composite sandwich panels require thin metal sheets, limiting machining capabilities, surface finish options, and panel size, leading to deformation and restricted design flexibility.
Innovation Solution
A process involving separate mechanical machining steps on individual layers before bonding, allowing thicker stainless steel sheets with various surface finishes, and the use of a counterbalancing sheet to create an open box structure with enhanced stability and aesthetic options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If thin metal sheets (2-3 tenths of millimetre) are used in conventional production processes, then machining operations (cutting and punching) can be performed on bonded sandwich panels, but the panels become very delicate to machine and suffer from considerable bending and deformation, especially when producing large dimension panels
Solution Approach 1:
The invention applies preliminary machining operations to the metal sheet before bonding it to the core material. By performing cutting, punching, and shaping operations on the metal sheet while it is still separate and structurally stable, the panel avoids deformation issues that would occur if machining were performed after bonding thin sheets into a sandwich structure.
2Ease of manufacture
If very thin metal sheets are used to enable machining operations on bonded panels, then panels can be produced with sandwich structure, but the range of surface finishings is limited to typical sheet metal treatments (polishing or satin finish)
Solution Approach 1:
The invention performs surface finishing operations on the metal sheet before bonding it to the core material. This preliminary action allows the application of diverse aesthetic finishings (anodizing, powder coating, painting, embossing) to the metal sheet while it maintains structural stability, rather than being limited to simple polishing or satin finishes that would be applied to thin bonded panels.
3Adaptability or versatility
If mechanical machining operations are performed after the panel is fully assembled, then coupling systems can be defined, but the finished product becomes vulnerable to damage during handling and machining
Solution Approach 1:
The invention performs all mechanical machining operations including those that define coupling systems and accessories before bonding the metal sheet to the core material. This ensures the metal sheet is in its most robust state during machining, protecting the finished product from damage that would occur if machining were performed on the assembled sandwich panel.
4Strength
If thicker metal sheets are used to improve strength and surface finishing options, then aesthetic versatility and structural strength increase, but machining operations on bonded panels become practically impossible
Solution Approach 1:
The invention performs all necessary machining operations on the metal sheet before bonding it to the core material. This allows the use of thicker metal sheets (which provide greater strength and better surface finishing options) because the machining is done when the sheet is still structurally stable and not yet constrained by the bonded sandwich structure.
5Adaptability or versatility
If all layers are machined simultaneously in bonded sandwich panels, then coupling systems can be defined, but the different nature of bonded materials complicates machining operations
Solution Approach 1:
The invention segments the manufacturing process into distinct stages: first machining the metal sheet independently, then bonding it to the core material, and finally performing any necessary machining on the core material separately. This segmentation allows each material to be machined with appropriate tools and parameters suited to its specific properties, avoiding the complexity of simultaneously machining bonded layers with different characteristics.
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
Enables the production of strong, lightweight panels with improved planarity and design versatility, suitable for large formats, rapid assembly, and various surface finishes, while maintaining dimensional stability and resistance to weathering.
Implementation Method 1
bonding, by gluing, said stainless steel sheet to said sheet of core material; bonding, by gluing, a counterbalancing metal sheet to said sheet of core material
Data Source
Figure 1a~1c
Figure 1d~3
AI summary
The invention relates to the sector of building and cladding materials. More in detail, the invention relates to a process for producing composite finishing panels (1) comprising the steps of: - providing a stainless steel sheet (2) having at least the face intended to face the outside of the panel with a surface finishing suitable for the use; - performing mechanical machining operations (3, 4, 5) on said sheet; - providing a sheet of core material (6); - bonding, by gluing, said stainless steel sheet (2) to said sheet of core material (6); - performing mechanical machining operations (3, 4, 5, 7) on said sheet of core material (6); - bonding, by gluing, a counterbalancing metal sheet (8) to said sheet of core material (6), without involving the perimeter edge (6') thereof; - bending the perimeter edges (2', 6') of said stainless steel sheet (2) bonded to said sheet of core material (6) around said counterbalancing sheet (8) to define a box structure of the panel.