Method for manufacturing three-dimensional sandwich panel based on regularized cylinder array
Through the three-dimensional sandwich plate manufacturing method based on regular cylindrical array, the manufacturing problem of complex irregular solid block structures is solved, efficient manufacturability, lightweight and versatility are achieved, and the mechanical properties and welding strength of the sandwich plate are improved.
Patent Information
- Application Number
- CN202510464462.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2025-07-11
AI Technical Summary
The complex irregular solid block structures produced by traditional finite element topology optimization methods have difficulties in welding and processing and manufacturing, which increases the manufacturing difficulty and makes it difficult to achieve efficient manufacturability.
The three-dimensional sandwich plate manufacturing method based on regular cylindrical arrays is adopted, and the design is adapted to the process through structural reconstruction and process. The stainless steel thin plate and cylindrical array structure are used, combined with laser penetration welding to ensure structural stability and welding strength, and can be filled with sound insulation or damping materials to improve versatility.
It realizes the efficient manufacturing of complex sandwich structures, reduces manufacturing costs, improves lightweight effects and mechanical properties, enhances welding strength, and has sound insulation, heat insulation and shock absorption properties.
Smart Images
Figure CN120287663A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sandwich structure manufacturing, specifically a manufacturing method for three-dimensional sandwich panels, and is particularly suitable for the manufacturing of sandwich panels with complex irregular solid large structures. Background Art
[0002] In the field of sandwich structure manufacturing, traditional finite element topology optimization methods often produce solid large structures with overall irregular shapes, such as X-shaped structures. These structures pose many difficulties in the welding and manufacturing processes. Such irregular solid large structures increase the manufacturing difficulty. Therefore, how to efficiently and manufacturably produce such complex sandwich structures has become an urgent problem to be solved. Summary of the Invention
[0003] To solve the problems raised in the above background art, the present invention proposes a manufacturing method for three-dimensional sandwich panels based on a regularized cylinder array. Through innovative structural reconstruction and process adaptation design, the method realizes the efficient manufacturability of complex sandwich structures, while ensuring the lightweight and mechanical properties of the products.
[0004] The three-dimensional sandwich panel structure of the present invention includes a main frame, an upper panel, a lower panel, and a sandwich layer. Among them, the upper panel and the lower panel are planar stainless steel thin plate structures arranged in parallel; the sandwich layer is composed of multiple groups of cylinder arrays with the same size arranged in an array. Flanges extending radially are provided at both ends of the cylinder, and the flanges are connected to the upper panel and the lower panel by welding. The dimensions such as the diameter, height, and wall thickness of the cylinder are unified to form a nested structure.
[0005] Preferably, the diameter of the cylinder of the present invention is preferably 50.8 mm, the height is 10 mm, and the wall thickness is 0.5 mm. The adjacent cylinders are closely spaced to ensure the stability and load-bearing capacity of the structure.
[0006] Preferably, based on the finite element topology optimization algorithm, a load density distribution cloud map is generated. Through fine algorithm analysis, the sandwich layer is divided into a high-stress dense area and a low-stress sparse area. The cylinder coordinate parameter set is derived, and the cylinders are arranged according to the cloud map division module to ensure the lightweight effect while meeting the mechanical property requirements.
[0007] Preferably, the width of the flange is 1-3 times the wall thickness of the cylinder, and the flange is inclined outward at an angle of 5° with respect to the axis of the cylinder to enhance the welding strength and the stability of the structure.
[0008] Preferably, the welding method of the present invention uses laser penetration welding. This welding method not only improves the welding efficiency but also effectively reduces the heat affected zone and ensures the integrity of the structure.
[0009] Preferably, the upper panel, the lower panel and the cylinder are all made of S304L stainless steel to ensure the corrosion resistance and strength of the structure. This material selection not only extends the service life of the sandwich panel but also improves its adaptability in harsh environments.
[0010] Preferably, the inside of the cylinder can also be filled with sound insulation or damping materials, with a filling rate of 10%-95%, to improve the sound insulation, heat insulation and shock absorption performance of the structure.
[0011] Advantages of the present invention:
[0012] 1. High-efficiency manufacturability: Through the structural design and process adaptation of the cylinder array, the present invention realizes the high-efficiency manufacturability of complex sandwich structures and reduces the manufacturing cost.
[0013] 2. Good lightweight effect: The use of stainless steel thin plates and cylinder array structures effectively reduces the weight of the sandwich panel and improves the lightweight effect of the product.
[0014] 3. Excellent mechanical properties: The arrangement of the cylinder array is determined according to the results of topological optimization, ensuring that the mechanical properties of the sandwich panel meet the usage requirements.
[0015] 4. High welding strength: Laser penetration welding is adopted to improve the welding strength and the stability of the structure.
[0016] 5. Versatility: The inside of the cylinder can be filled with sound insulation or damping materials to improve the sound insulation, heat insulation and shock absorption performance of the sandwich panel. Description of the drawings
[0017] Figure 1 is the structural explosion diagram and partial enlarged view of the present invention;
[0018] Figure 2 is the schematic diagram of the sandwich layer of the present invention.
[0019] In the figure: 1 upper panel, 2 lower panel, 3 sandwich layer, 4 cylinder, 5 flanging, 6 sound insulation or nylon material. Specific implementation
[0020] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.
[0021] 1. Material preparation: Select S304L stainless steel as the material for the upper panel, the lower panel and the cylinder, and prepare thin plates and cylinders of the required sizes.
[0022] 2. Cylinder processing: Radially extending flanges are processed at both ends of the cylinder. The width of the flanges is 1-3 times the wall thickness of the cylinder, and the flanges are inclined outward at an angle of 5° to the axis of the cylinder.
[0023] 3. Parametric modeling: Based on the finite element topology optimization algorithm, a cloud map of load density distribution is generated, and the sandwich layer is divided into a high-stress dense area and a low-stress sparse area. According to the division result of the cloud map, the cylinders are arranged in an array at the preset high-stress positions.
[0024] 4. Welding connection: The flanges of the cylinders are welded to the upper panel and the lower panel by laser penetration welding.
[0025] 5. Filling material (optional): Sound insulation or damping material is filled inside the cylinders as needed, and the filling rate is 10%-95%.
[0026] 6. Quality inspection: The mechanical properties of the manufactured three-dimensional sandwich panel are inspected to ensure that all performance indicators meet the requirements.
[0027] Through the above implementation steps, a three-dimensional sandwich panel based on a regularized cylinder array with high manufacturability, good lightweight effect, excellent mechanical properties, high welding strength, and versatility can be manufactured.
[0028] The above is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.
Claims
1. A three-dimensional sandwich panel structure based on a regularized cylinder array, characterized in that, Comprising: The upper panel (1) is a flat stainless steel thin plate structure; the lower panel (2) is arranged parallel to the upper panel (1), and the sandwich layer (3) is composed of an array of multiple groups of cylinders (4) with the same size. Both ends of the cylinder (4) are provided with radially extending flanges (5), and the flanges (5) are connected to the upper panel (1) and the lower panel (2) by welding; the diameters, heights, wall thicknesses, etc. of the multiple groups of cylinders (4) are unified to form a sandwich structure.
2. The three-dimensional sandwich panel structure according to claim 1, wherein: The diameter of the cylinder (4) is 50.8 mm, the height is 10 mm, and the wall thickness is 0.5 mm. The adjacent cylinders are closely spaced.
3. The three-dimensional sandwich panel structure according to claim 1 or 2, characterized in that: The load distribution cloud map is generated by the finite element topology optimization algorithm. The sandwich layer is divided into a high-stress dense area and a low-stress sparse area. In the high-stress area, the cylinders are densely arranged, and in the low-stress area, the redundant materials are removed through topology optimization to form a cylinder-free arrangement area.
4. The three-dimensional sandwich panel structure according to claim 1, wherein: The width of the flange (5) is 1-3 times the wall thickness of the cylinder, and the flange (5) is inclined outward at an angle of 5° with the axis of the cylinder.
5. The three-dimensional sandwich panel structure according to claim 1, characterized in that: The welding method is laser penetration welding.
6. The three-dimensional sandwich panel structure according to claim 1, wherein: The materials of the upper panel (1), the lower panel (2), and the cylinder (4) are all S304L stainless steel.
7. The three-dimensional sandwich panel structure according to claim 1, wherein: The interior of the cylinder (4) is filled with sound insulation (6) or damping material, and the filling rate is 10%-95% (optional).