阅读说明：本技术 一种轻质抗暴点阵三明治板及其制备方法 (Light anti-riot lattice sandwich board and preparation method thereof ) 是由 刘长猛 黄俊锦 徐田秋 张浩锐 于 2019-11-11 设计创作，主要内容包括：本发明提供了一种轻质抗暴点阵三明治板及其制备方法,属于材料制备技术领域。本发明中,提高单纯的金属点阵三明治板的抗暴性能需要提高相对相对密度,但是金属(特别是钢)相对密度很大,所以提高相对密度的代价较高,将聚氨酯泡沫填充体填充于金属点阵三明治板里,能够利用金属点阵与聚氨酯泡沫相互之间的约束作用,在提高抗暴性能的同时减小提高相对相对密度的代价,从而实现轻质抗暴的性能。(The invention provides a light anti-explosion lattice sandwich plate and a preparation method thereof, belonging to the technical field of material preparation. In the invention, the relative density needs to be improved when the anti-riot performance of the pure metal lattice sandwich plate is improved, but the relative density of metal (particularly steel) is high, so that the cost for improving the relative density is high, and the polyurethane foam filling body is filled in the metal lattice sandwich plate, so that the cost for improving the relative density is reduced while the anti-riot performance is improved by utilizing the constraint action between the metal lattice and the polyurethane foam, and the light anti-riot performance is realized.)

1. The utility model provides a light anti-riot dot matrix sandwich board, its characterized in that, includes metal decking and lower metal decking, evenly distributed has pyramid type metal dot matrix cell element between metal decking and the lower metal decking, the lower surface of going up metal decking and the upper surface adhesion of pyramid type metal dot matrix cell element, the upper surface of metal decking and the lower surface adhesion of pyramid type metal dot matrix cell element down, between pyramid type metal dot matrix cell element, the space of pyramid type metal dot matrix cell element and last metal decking and lower metal decking is filled by polyurethane foam obturator.

2. The lightweight lattice sandwich panel of claim 1, wherein the number of layers of the lightweight lattice sandwich panel is multiple.

3. The lightweight lattice sandwich panel of claim 1, wherein the upper and lower metal panels are made of steel.

4. The lightweight storm-resistant lattice sandwich panel according to claim 1, wherein the distance between the centers of the pyramid-type metal lattice cells is 50-100 mm.

5. The lightweight lattice-reinforced sandwich panel according to claim 1 or 4, wherein the pyramid-shaped metal lattice cells have a relative density of 0.05-0.3.

6. The method for preparing a lightweight antiriot lattice sandwich panel according to any of claims 1 to 5, comprising the steps of:

performing arc 3D printing on the lower metal panel to obtain a pyramid-shaped metal dot matrix cell;

connecting the pyramid-shaped metal dot matrix cell with an upper metal panel by using electric arc 3D printing to obtain a semi-finished product;

and filling a polyurethane foaming agent in the gaps of the semi-finished product to obtain the light anti-explosion lattice sandwich plate.

7. The preparation method according to claim 6, wherein the arc 3D printing on the lower metal panel is carried out by the following specific process:

and performing arc 3D printing to obtain four inclined rods on the lower metal panel so as to form a pyramid-shaped metal dot matrix cell.

8. The method of claim 7, wherein the step of connecting the pyramid-shaped metal dot matrix cells to the upper metal panel by arc 3D printing comprises:

and preheating the upper end parts of the four inclined rods by using electric arcs to enable the upper end parts of the four inclined rods to be in a molten state to form nodes, then forming tapered holes in the upper metal panel, and matching the nodes with the tapered holes to realize the connection of the pyramid-shaped metal dot matrix cell elements and the upper metal panel.

9. The method according to claim 8, wherein after the tapering, the arc force is increased while the machine tool is moved along the circular path to mechanically stir the wire so that the molten pool is spread out sufficiently to form a deposit layer.

10. The method of claim 6, wherein the parameters for arc 3D printing on the lower metal panel include: the peak current in the initial stage is 250-300A, the duty ratio is 10-16%, the base current is 4-6A, the layer height is 0.3-0.6 mm, and the moving speed of the machine tool is 500-1000 cm/min.

Technical Field

The invention relates to the technical field of material preparation, in particular to a light anti-explosion lattice sandwich plate and a preparation method thereof.

Background

At present, in the field of anti-riot energy absorption, the anti-riot energy absorption capability of unit mass is improved mainly by using materials or porous structures. Lattice structures are one type of porous material. However, if the single metal lattice structure is required to improve the anti-explosion and energy-absorption performance, the relative density is improved to a certain extent, and the anti-explosion and energy-absorption capacity per unit mass is not obviously improved, namely, no plate with both light weight and anti-explosion performance exists in the prior art.

Disclosure of Invention

In view of the above, the present invention is directed to a light anti-explosion lattice sandwich plate and a method for manufacturing the same. The light anti-riot lattice sandwich board provided by the invention has both light weight and anti-riot performance.

In order to achieve the above object, the present invention provides the following technical solutions:

the invention provides a light anti-riot dot matrix sandwich plate which comprises an upper metal panel and a lower metal panel, wherein pyramid-shaped metal dot matrix cells are uniformly distributed between the upper metal panel and the lower metal panel, the lower surface of the upper metal panel is adhered to the upper surfaces of the pyramid-shaped metal dot matrix cells, the upper surface of the lower metal panel is adhered to the lower surfaces of the pyramid-shaped metal dot matrix cells, and gaps among the pyramid-shaped metal dot matrix cells, gaps among the upper metal panel and gaps among the lower metal panel are filled with polyurethane foam filling bodies.

Preferably, the number of layers of the light anti-explosion lattice sandwich plate is multiple.

Preferably, the upper metal panel and the lower metal panel are both made of steel.

Preferably, the distance between the centers of the pyramid-shaped metal lattice cells is 50-100 mm.

Preferably, the relative density of the pyramid-shaped metal lattice cells is 0.05-0.3.

The invention also provides a preparation method of the light anti-explosion lattice sandwich plate in the technical scheme, which comprises the following steps:

performing arc 3D printing on the lower metal panel to obtain a pyramid-shaped metal dot matrix cell;

connecting the pyramid-shaped metal dot matrix cell with an upper metal panel by using electric arc 3D printing to obtain a semi-finished product;

and filling a polyurethane foaming agent in the gaps of the semi-finished product to obtain the light anti-explosion lattice sandwich plate.

Preferably, the specific process of performing arc 3D printing on the lower metal panel is as follows:

and performing arc 3D printing to obtain four inclined rods on the lower metal panel so as to form a pyramid-shaped metal dot matrix cell.

Preferably, the specific process of connecting the pyramid-shaped metal dot matrix cell and the upper metal panel by using arc 3D printing is as follows:

and preheating the upper end parts of the four inclined rods by using electric arcs to enable the upper end parts of the four inclined rods to be in a molten state to form nodes, then forming tapered holes in the upper metal panel, and matching the nodes with the tapered holes to realize the connection of the pyramid-shaped metal dot matrix cell elements and the upper metal panel.

Preferably, after the tapered hole is formed, the electric arc force is increased, and meanwhile, the machine tool moves along the circular track to enable the wire to be mechanically stirred, so that a molten pool can be fully spread out to form a deposition layer.

Preferably, the parameters when performing arc 3D printing on the lower metal panel include: the peak current in the initial stage is 250-300A, the duty ratio is 10-16%, the base current is 4-6A, the layer height is 0.3-0.6 mm, and the moving speed of the machine tool is 500-1000 cm/min.

The invention provides a light anti-riot dot matrix sandwich plate which comprises an upper metal panel and a lower metal panel, wherein pyramid-shaped metal dot matrix cells are uniformly distributed between the upper metal panel and the lower metal panel, the lower surface of the upper metal panel is adhered to the upper surfaces of the pyramid-shaped metal dot matrix cells, the upper surface of the lower metal panel is adhered to the lower surfaces of the pyramid-shaped metal dot matrix cells, and gaps among the pyramid-shaped metal dot matrix cells, gaps among the upper metal panel and gaps among the lower metal panel are filled with polyurethane foam filling bodies. In the invention, the relative density needs to be improved when the anti-riot performance of the pure metal lattice sandwich plate is improved, but the relative density of metal (particularly steel) is high, so that the cost for improving the relative density is high, and the polyurethane foam filling body filled in the metal lattice sandwich plate can reduce the cost for improving the relative density while improving the anti-riot performance by utilizing the constraint action between the metal lattice and the polyurethane foam, thereby realizing the light anti-riot performance. The data of the embodiment shows that the light anti-riot lattice sandwich plate provided by the invention has the upper metal panel with the thickness of 4mm, the lower metal panel with the thickness of 2mm, the pyramid-shaped metal lattice cell with the thickness of 23mm and the length and width of 1m, and has the deformation value of 50% under the explosion load of 4kg TNT equivalent with the explosion distance of 1m compared with the solid steel plate with the same mass and length and width but different thickness, the light anti-riot lattice sandwich plate provided by the invention has the upper metal panel with the thickness of 3mm, the lower metal panel with the thickness of 4mm, the pyramid-shaped metal lattice cell with the thickness of 30mm and the length and width of 42m, and has the deformation value of 40% under the explosion load of 4kg TNT equivalent with the explosion distance of 1m compared with the solid steel plate with the same mass and length and width but different thickness, thus obviously improving the anti-riot performance of unit mass and achieving the aim of light weight anti-riot.

Furthermore, the invention also provides a preparation method of the light anti-explosion lattice sandwich plate, which is characterized in that the pyramid-shaped metal lattice cell is manufactured by using an electric arc 3D printing method, the material utilization rate is high, the manufacturing of the pyramid-shaped metal lattice cell can be completed efficiently and at low cost, and the problems of low material utilization rate and high processing cost of the existing method for manufacturing the metal lattice sandwich plate are solved; the pyramid-shaped metal dot matrix cell element is connected with the upper metal panel by using an electric arc 3D printing method, so that the connection quality is high, and the poor connection quality of connecting the dot matrix and the panel by using a brazing or gluing mode in the prior art is avoided; the polyurethane foaming agent is used for filling the gaps of the dot matrix sandwich plate, the operation is simple, the part of the dot matrix sandwich plate is not required to be additionally sealed, and the problems that in the prior art, the method for sealing three sides and then pouring the polyurethane foaming liquid is not suitable for the large-size dot matrix sandwich plate, the three sides of the large-size dot matrix sandwich plate are sealed, and the polyurethane foaming liquid is difficultly poured into the unsealed side in operation are solved.

Drawings

Fig. 1 is a schematic structural view of a lightweight anti-riot lattice sandwich plate provided by the present invention, wherein 1 is a metal panel; 2 is pyramid type metal lattice cell, 3 is polyurethane foam filler.

Detailed Description

The invention provides a light anti-riot dot matrix sandwich plate which comprises an upper metal panel and a lower metal panel, wherein pyramid-shaped metal dot matrix cells are uniformly distributed between the upper metal panel and the lower metal panel, the lower surface of the upper metal panel is adhered to the upper surfaces of the pyramid-shaped metal dot matrix cells, the upper surface of the lower metal panel is adhered to the lower surfaces of the pyramid-shaped metal dot matrix cells, and gaps among the pyramid-shaped metal dot matrix cells, gaps among the upper metal panel and gaps among the lower metal panel are filled with polyurethane foam filling bodies.

Fig. 1 is a schematic structural view of a lightweight anti-riot lattice sandwich plate provided by the present invention, wherein 1 is a metal panel; 2 is pyramid type metal lattice cell, 3 is polyurethane foam obturator, metal decking includes upper metal panel and lower metal panel.

In the present invention, the number of layers of the light anti-explosion lattice sandwich plate is preferably multiple.

In the present invention, the upper metal panel and the lower metal panel are preferably made of steel.

In the present invention, the preferred pitch of the centers of the pyramid-shaped metal lattice cells is 50 to 100mm, and more preferably 75 to 98 mm.

In the present invention, the relative density of the pyramid-shaped metal lattice cells is preferably 0.05 to 0.3, and more preferably 0.14.

In the present invention, the material of the pyramid-shaped metal lattice cells is preferably steel.

In an embodiment of the present invention, the thickness of the upper metal panel is preferably 4mm, the thickness of the lower metal panel is preferably 2mm, the thickness of the pyramid-type metal lattice cell is preferably 23mm, or the thickness of the upper metal panel is 3mm, the thickness of the lower metal panel is 4mm, the thickness of the pyramid-type metal lattice cell is 30mm, and the length and the width are both 42 m.

The invention also provides a preparation method of the light anti-explosion lattice sandwich plate in the technical scheme, which comprises the following steps:

performing arc 3D printing on the lower metal panel to obtain a pyramid-shaped metal dot matrix cell;

connecting the pyramid-shaped metal dot matrix cell with an upper metal panel by using electric arc 3D printing to obtain a semi-finished product;

and filling a polyurethane foaming agent in the gaps of the semi-finished product to obtain the light anti-explosion lattice sandwich plate.

According to the invention, arc 3D printing is carried out on the lower metal panel to obtain the pyramid type metal dot matrix cell. In the present invention, the specific process of performing arc 3D printing on the lower metal panel is preferably:

and performing arc 3D printing to obtain four inclined rods on the lower metal panel so as to form a pyramid-shaped metal dot matrix cell.

In the present invention, the parameters for performing arc 3D printing on the lower metal panel preferably include: the peak current in the initial stage is 250-300A, the duty ratio is 10-16%, the base current is 4-6A, the layer height is 0.3-0.6 mm, and the moving speed of the machine tool is 500-1000 cm/min. In the invention, after the arc 3D printing is carried out on the lower metal panel for 6-10 pulse periods, the peak current is preferably adjusted to be 90-110A, the duty ratio is 5%, the base current is 4-6A, the layer height is 0.3-0.6 mm, and the moving speed of a machine tool is 500-1000 cm/min.

In the invention, the wire feeding speed when the arc 3D printing is carried out on the lower metal panel is preferably 40 cm/min-100 cm/min, and is determined according to the required forming size.

According to the invention, arc 3D printing is utilized to connect the pyramid-shaped metal dot matrix cell and the upper metal panel to obtain a semi-finished product. In the present invention, the specific process of connecting the pyramid-shaped metal dot matrix cells and the upper metal panel by arc 3D printing is preferably as follows:

and preheating the upper end parts of the four inclined rods by using electric arcs to enable the upper end parts of the four inclined rods to be in a molten state to form nodes, then forming tapered holes in the upper metal panel, and matching the nodes with the tapered holes to realize the connection of the pyramid-shaped metal dot matrix cell elements and the upper metal panel.

In the invention, after the conical hole is opened, the electric arc force is preferably increased, and meanwhile, the machine tool moves along the circular track to mechanically stir wires, so that a molten pool can be fully spread out to form a deposition layer. In the present invention, the parameters after the node is matched with the tapered hole are preferably as follows: the peak current is 250-300A, the duty ratio is 18-22%, the base current is 10-15A, and the moving speed of the machine tool is 60 cm/min.

After a semi-finished product is obtained, the polyurethane foaming agent is filled in the gaps of the semi-finished product, and the lightweight anti-explosion lattice sandwich plate is obtained. The filling method of the present invention is not particularly limited, and may be a method known to those skilled in the art.

For further illustration of the present invention, the light anti-explosion lattice sandwich plate and the preparation method thereof provided by the present invention will be described in detail with reference to the examples, which should not be construed as limiting the scope of the present invention.