阅读说明：本技术 一种轻质抗弹点阵三明治板及其制备方法 (Light bullet-resistant dot matrix sandwich plate and preparation method thereof ) 是由 刘长猛 徐田秋 黄俊锦 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弹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弹性能需要提高相对密度,但是金属(特别是钢)密度很大,所以提高相对密度的代价较高,将陶瓷填充物填充于金属点阵三明治板里能够利用金属点阵与陶瓷填充物之间的约束作用,在提高抗弹性能的同时减小提高相对密度的代价,从而实现轻质抗弹的性能。(The invention provides a light bullet-resistant dot matrix sandwich plate and a preparation method thereof, and belongs to the technical field of material preparation. In the invention, the relative density needs to be improved when the elasticity resistance of the pure metal lattice sandwich plate is improved, but the metal (particularly steel) density is high, so that the cost for improving the relative density is higher, and the constraint action between the metal lattice and the ceramic filler can be utilized when the ceramic filler is filled in the metal lattice sandwich plate, so that the cost for improving the relative density is reduced while the elasticity resistance is improved, and the light elasticity resistance is realized.)

1. The utility model provides a light bullet-resistant 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 ceramic packing.

2. The lightweight bulletproof dot matrix sandwich panel according to claim 1, wherein the number of layers of the lightweight bulletproof dot matrix sandwich panel is 2-4.

3. The lightweight spring-proof sandwich panel according to claim 1, wherein the upper and lower metal panels are made of titanium alloy.

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

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

6. The method for preparing a lightweight bulletproof dot matrix sandwich panel according to any one of claims 1 to 5, comprising 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 ceramic fillers in the gaps of the semi-finished product to obtain the light and elastic-resistant dot matrix 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-elastic dot matrix sandwich plate and a preparation method thereof.

Background

At present, in the field of elastic resistance and energy absorption, the elastic resistance and energy absorption capability of unit mass are improved mainly by using materials or porous structures. Lattice structures are one type of porous material. However, if a single metal lattice structure is required to improve the elastic resistance and energy absorption performance, the relative density is improved to a certain extent, and the elastic resistance and energy absorption capacity per unit mass is not obviously improved, i.e., a light-weight and elastic resistance plate is not taken into consideration in the prior art.

Disclosure of Invention

In view of the above, the present invention is directed to a light-weight and anti-elastic dot matrix sandwich panel and a method for manufacturing the same. The light anti-elastic dot matrix sandwich plate provided by the invention has both light and anti-elastic properties.

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

the invention provides a light-weight bulletproof 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 the lower metal panel are filled with ceramic fillers.

Preferably, the number of layers of the light bullet-resistant dot matrix sandwich plate is 2-4.

Preferably, the upper metal panel and the lower metal panel are made of titanium alloy.

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 bullet-resistant dot matrix 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 ceramic fillers in the gaps of the semi-finished product to obtain the light and elastic-resistant dot matrix 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-weight bulletproof 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 the lower metal panel are filled with ceramic fillers. In the invention, the relative density needs to be improved when the elasticity resistance of the pure metal lattice sandwich plate is improved, but the metal (particularly steel) density is high, so that the cost for improving the relative density is high, and the constraint action between the metal lattice and the ceramic filler can be utilized when the ceramic filler is filled in the metal lattice sandwich plate, so that the cost for improving the relative density is reduced while the elasticity resistance is improved, and the light elasticity resistance is realized. The data of the embodiment shows that the light bullet-resistant dot matrix sandwich plate provided by the application, wherein the thickness of the upper metal panel is 4mm, the thickness of the lower metal panel is 2mm, the thickness of the pyramid-shaped metal dot matrix cell is 23mm, and the length and width of the light bullet-resistant dot matrix sandwich plate are both 1m, compared with a solid titanium alloy plate which has the same mass and length and width but different thicknesses, the light bullet-resistant dot matrix sandwich plate has the advantages that the sandwich plate and a steel plate are equidistantly penetrated at the penetrating positions of 600m/s, the outgoing speed of the bullet is 237m/s for the sandwich plate, the ballistic limit is 440.26m/s, the outgoing speed of the bullet is 338m/s for the titanium alloy plate, the ballistic limit is 368.45m/s, and for the same incoming speed, the outgoing speed of the sandwich plate is obviously smaller, more kinetic energy of the bullet is converted into the internal energy of the sandwich plate, which shows that the bullet-resistant elastic energy per unit mass is obviously improved, the aim of light weight and elasticity resistance is achieved.

Furthermore, the invention also provides a preparation method of the light anti-elastic dot matrix sandwich plate, which is characterized in that the pyramid-shaped metal dot matrix cell is manufactured by using an electric arc 3D printing method, the material utilization rate is high, the manufacturing of the pyramid-shaped metal dot matrix cell can be efficiently completed at low cost, and the problems of low material utilization rate and high processing cost of the existing method for manufacturing the metal dot matrix sandwich plate are solved; the connection between the pyramid-shaped metal dot matrix cell and the upper metal panel is completed by using an electric arc 3D printing method, the connection quality is high, and the problems that in the prior art, a three-dimensional dot matrix interlocking process is combined with a brazing technology for manufacturing, a multi-layer sandwich structure cannot be prepared, and only single-layer sandwich can be prepared are solved.

Drawings

FIG. 1 is a schematic structural view of a light bullet-resistant lattice sandwich plate of the present invention, wherein 1 is a metal panel; 2 is pyramid type metal lattice cell, 3 is ceramic filler.

Detailed Description

The invention provides a light anti-elastic 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 the lower metal panel are filled with ceramic fillers.

FIG. 1 is a schematic structural view of a light bullet-resistant lattice sandwich plate of the present invention, wherein 1 is a metal panel; 2 is pyramid type metal lattice cell, 3 is ceramic filler, the metal faceplate includes upper metal faceplate and lower metal faceplate.

In the invention, the number of layers of the light bullet-resistant lattice sandwich plate is preferably 2-4.

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

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 cell is preferably titanium alloy.

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 bullet-resistant dot matrix 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 ceramic fillers in the gaps of the semi-finished product to obtain the light and elastic-resistant dot matrix 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 invention fills the ceramic filler in the gap of the semi-finished product to obtain the light bullet-resistant dot matrix sandwich board. The filling method of the present invention is not particularly limited, and may be a method known to those skilled in the art.

To further illustrate the present invention, the light-weight, spring-resistant dot matrix sandwich panel and the method for making the same are described in detail below with reference to examples, which should not be construed as limiting the scope of the invention.