CN115235289A

CN115235289A - Composite material bullet holder and forming method

Info

Publication number: CN115235289A
Application number: CN202210755012.XA
Authority: CN
Inventors: 高露露; 赵明; 孟梦; 刘伟; 钱万俊
Original assignee: Jiangsu Hengshen Co Ltd
Current assignee: Jiangsu Hengshen Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-10-25

Abstract

The invention discloses a composite material bullet holder and a forming method thereof, wherein the bullet holder comprises a bullet holder formed by connecting a multi-petal bullet holder main body, and a boss meshed with a bullet is arranged on the bullet holder along the central axis direction; the bullet support main body comprises a spring piece device and an outer cladding layer used for wrapping the spring piece device, the spring piece device comprises a plurality of spring pieces which are sequentially connected, two adjacent spring pieces are connected through adhesive film curing, two outer spring pieces are connected with the outer cladding layer through adhesive film curing, and the outer end of each spring piece is connected with the outer cladding layer through adhesive film curing; the elastic sheet and the outer cladding are both made of carbon fiber prepreg which is laid in a radial mode from the center. This application shell fragment and surrounding layer are radially to be put from the center by carbon fiber prepreg and make, and carbon fiber prepreg's use has reduced the weight of shell fragment and surrounding layer, has improved the intensity of shell fragment and surrounding layer, and the adoption is the form structure of radially putting from the center and stabilizes, makes the fibre direction the same with the main load direction of structure, has guaranteed the intensity that the bullet held in the palm.

Description

Composite material bullet holder and forming method

Technical Field

The invention relates to the technical field of bullet holders, in particular to a composite bullet holder and a forming method thereof.

Background

The projectile holder is used as a device for projectile launching guidance and function enhancement, is subjected to high-temperature and high-pressure action of gunpowder during firing, is subjected to side pressure action on rifling, is subjected to elastic stress, air resistance, centrifugal force generated by projectile spinning and the like during flying away from a gun (cannon), and is complex in stress; the projectile support can be quickly dropped off at the moment when the projectile leaves the mouth of the gun (cannon).

Therefore, the bullet support material needs to have extremely high strength and light weight, and a material with high specific strength is selected so as to improve the power of the initial speed and the terminal trajectory of the bullet. For the support of the large-diameter projectile, although the metal support has good mechanical properties and is easy to form, the initial speed of the projectile can be reduced due to the larger weight of the metal support, and the impact force is increased when the metal support is separated from the projectile, so that surrounding equipment is easy to damage. Plastic materials generally do not have sufficient mechanical properties and cannot meet the use requirements. The existing composite material structure design is not designed according to the characteristics of the composite material, and the advantages of the composite material cannot be fully exerted.

The carbon fiber composite material is one of the materials with the highest specific strength and specific modulus at present and is the preferred material for manufacturing the bullet holder, but due to the material characteristics of anisotropy, complex manufacturing process and the like, how to fully utilize the excellent performance of the carbon fiber composite material to design and manufacture the bullet holder structure with excellent performance, simple manufacture and wide application range is the work required by people.

Disclosure of Invention

The invention aims to provide a composite material bullet holder and a forming method thereof, and aims to solve the problems that the bullet holder in the prior art is complex to manufacture and low in structural strength.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a composite material bullet holder comprises a bullet holder formed by connecting multi-petal bullet holder main bodies, wherein a boss meshed with a bullet is arranged on the bullet holder along the direction of a central axis;

the bullet support main body comprises an elastic sheet device and an outer cladding layer used for wrapping the elastic sheet device, the elastic sheet device comprises a plurality of elastic sheets which are connected in sequence, two adjacent elastic sheets are connected through adhesive film curing, two outer elastic sheets are connected with the outer cladding layer through adhesive film curing, and the outer end of each elastic sheet is connected with the outer cladding layer through adhesive film curing;

the elastic sheet and the outer cladding are both made of carbon fiber prepreg which is laid in a radial mode from the center.

Furthermore, the layers of the elastic sheets are symmetrically arranged along the middle surface of the paving paste.

Further, the 0-degree direction of the elastic sheet accounts for at least 50% of the total layer, wherein the 0-degree direction is the length direction of the elastic sheet.

Further, the proportion of the 0-degree direction layer, the 90-degree direction layer, the 45-degree direction layer and the-45-degree direction layer is (5-7): (1-3): (1-2): (1-2).

Furthermore, the elastic sheet is made by a die pressing process.

Further, the bullet support main body is made by a die pressing process.

Further, the sabot includes two to four-piece sabot bodies.

Further, the sabot includes three lamella sabot main parts, the sabot main part is 120 circular arc structure.

Further, the outer cladding layer wraps the spring plate device from three sides, four sides or five sides.

The invention also discloses a method for forming the composite material bullet holder, which is characterized by comprising the following steps:

paving and sticking the carbon fiber prepreg in a cavity of a spring plate mould, wherein the paving is symmetrical about the paving middle plane;

combining films, curing and machining to obtain elastic sheets;

connecting the obtained plurality of elastic sheets through adhesive films to form an elastic sheet device;

paving an outer cladding layer outside the elastic sheet device, and curing to form a bullet holder main body;

the multi-petal bullet holder main body is connected into a bullet holder.

According to the technical scheme, the embodiment of the invention at least has the following effects:

1. according to the bullet holder, the elastic sheet and the outer cladding layer are both made by radially laying the carbon fiber prepreg from the center, the weight of the elastic sheet and the outer cladding layer is reduced and the strength of the elastic sheet and the outer cladding layer is improved by using the carbon fiber prepreg, the structure is stable in a form of radially laying from the center, the fiber direction is the same as the main bearing direction of the structure, the high-strength characteristic of the carbon fiber prepreg can be exerted, and the strength of the bullet holder is ensured;

2. the cartridge receiver comprises a plurality of same elastic sheets which are laid and molded simultaneously, the cartridge receiver is convenient and quick to manufacture, and the production efficiency of the cartridge receiver is improved;

3. the elastic sheet and the elastic sheet as well as the elastic sheet and the bullet holder are connected in a glue film curing manner, so that the connection strength is higher, and the strength of the formed bullet holder is improved.

Drawings

FIG. 1 is a schematic view of a bullet holder according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of the connection of the sabot and the projectile in an embodiment of the present invention;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a schematic view of a sabot body in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of the connection between the elastic sheet and the outer cover according to the embodiment of the present invention;

FIG. 6 is a schematic view of a spring plate according to an embodiment of the present invention;

FIG. 7 is a schematic view of the formation of the shell and the overwrap according to the embodiment of the invention;

FIG. 8 is a schematic view of a cross-sectional ply of a bullet holder body in accordance with an embodiment of the present invention;

FIG. 9 is a schematic view of a cover lay of a ballistic sheet in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of an outer cladding ply in accordance with an embodiment of the present invention;

fig. 11 is a schematic diagram of a sabot structure according to various embodiments of the present invention.

Wherein: 1. a bullet holder main body; 2. a pill; 11. a spring plate; 12. and (5) an outer cladding.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1

A composite material bullet holder comprises a bullet holder formed by connecting multi-petal bullet holder main bodies 1, wherein a boss meshed with a bullet 2 is arranged on the bullet holder along the direction of a central axis; the bullet holder main body 1 comprises a spring piece device and an outer cladding layer 12 used for wrapping the spring piece device, the spring piece device comprises a plurality of spring pieces 11 which are sequentially connected, two adjacent spring pieces 11 are connected through adhesive film curing, two outer spring pieces 11 and the outer cladding layer 12 are connected through adhesive film curing, and the outer end of each spring piece 11 is connected through adhesive film and the outer cladding layer 12 in a curing manner; the elastic sheet 11 and the outer cladding 12 are both made of carbon fiber prepreg radially laid from the center.

The bullet of this application design holds in the palm, shell fragment and surrounding layer are radial laying by carbon fiber prepreg from the center and make, and carbon fiber prepreg's use has reduced the weight of shell fragment and surrounding layer, has improved the intensity of shell fragment and surrounding layer, and the form structure that adopts to be radial laying from the center is firm, makes the fibre reverse the same with structure owner load direction, can exert carbon fiber prepreg's high strength characteristic, has guaranteed the intensity that the bullet held in the palm.

The bullet holder is made of a carbon fiber composite material, the density of the carbon fiber composite material is 1.6-1.7 g/cm & lt 3 & gt, the tensile strength is greater than 1500MPa, and the bullet holder is specifically formed by laying EH107-35% -12KHF40A-U-145GSM-600 carbon fiber unidirectional prepregs.

The bullet holder is of a ring cylinder structure as a whole, and a boss meshed with the bullet is arranged inside the bullet holder.

The bullet holds in the palm equally and is divided into three lamella bullet support main parts 1. The magazine body 1 is interchangeable. The utility model provides a bullet holds in palm structure adopts the fashioned mode of components of a whole that can function independently, and single thickness is little, can many people accomplish simultaneously and spread the work of pasting fast, spreads to paste efficiently, compares the inside of integrated into one piece of high quality.

The bullet holds in palm main part 1 and comprises shell fragment 11 and surrounding layer 12, and surrounding layer 12 parcel is in the periphery of shell fragment 11. In a specific embodiment, the magazine is designed as three magazine bodies 1, each magazine body 1 comprising eleven spring blades. Eleven spring plates 11 are connected together through an adhesive film to form a spring plate device, the spring plate device is combined into an arc-shaped structure, the arc-shaped structure and the outer cladding 12 are connected and combined into the bullet holder main body 1 through the adhesive film, and the whole combined bullet holder main body 1 is of a 120-degree arc structure. The spring plate 11 is wrapped on three sides of the outer cladding 12, the angle between the spring plate 11 and the outer cladding layer is shown in table 1, the layering mode is shown in fig. 7 and 8, the spring plate is laid radially from the center, and the layering is symmetrical along the length direction.

TABLE 1

The utility model provides a carbon-fibre composite bullet holds in palm whole shop and becomes radial complete symmetrical structure, and the structure is firm, and the fibre direction is the same with the main load direction of structure, full play carbon-fibre composite's high strength characteristic, structure safe and reliable.

Furthermore, the length direction of the elastic sheet is a 0-degree layering direction, and the ratio of the 0-degree layering direction, the 90-degree layering direction, the 45-degree layering direction and the-45 layering direction is (5-7): (1-3): (1-2): (1-2), further, the ratio of the 0-ply direction, the 90-ply direction, the 45-ply direction and the-45-ply direction is 6. The layering proportion of other angles can be adjusted under the condition of ensuring more than 50% of 0-degree layering proportion, and the strength requirement of the bullet support can be met only by requiring 50% of 0-degree layering of the multilobe type combined bullet support structure designed by the application. The layer losing mode in the figures 7 and 8 is a preferable mode, and the combination mode of the whole layer and the layer losing mode can be adjusted according to the material thickness and the layering angle.

In some embodiments, the elastic sheet 11 is an elastic sheet made by a molding process, the elastic sheet has a length of L in the elastic body composition, and a plurality of elastic sheets with a length of at least 2L are formed at one time. The EH601-146gsm-1000-03 adhesive film is added between the cured elastic sheet and the elastic sheet, and the external adhesive film and the uncured outer cladding layer are integrally formed through secondary curing by a mould pressing process. The forming process of the bullet holder is not limited to a die pressing process, the blank of the bullet holder is simple in structure, the existing common process can be used for manufacturing, the cost of the die pressing process is low, and the product quality cannot be reduced. The conventional processes such as autoclave and liquid molding are more expensive than the molding process, but the molding quality is good. The impact on different process qualities of the bullet support structure is small.

And (3) carrying out internal and external machining on the blank formed by curing the elastic sheet 11 and the outer cladding 12 together according to requirements, so that the size of the workpiece is within the range of the use requirements.

This application carbon-fibre composite bullet support structure, shell fragment 11 and shell fragment 11, shell fragment 11 and cladding 12 between through with the same model glued membrane secondary cure of main material, compare the interface reliable with general connected mode.

The application the bullet hold in the palm structure be applicable to most forming process, especially can be used to simple mould pressing technology, with low costs, efficient, the manufacturability is strong.

In the present application, the sabot is of a ring structure, the inside of the sabot has a boss engaged with the projectile, and the outside of the sabot can be processed into different sections according to the requirements of the projectile launching tube, as shown in fig. 3 and 11.

This application adopts full carbon fiber composite bullet to hold in the palm the structure, make full use of carbon fiber composite high specific strength, than modulus characteristics design, overall structure symmetrical structure completely, structural efficiency is high, and the example product passes through static test, does not destroy under the effect of bearing shot 75kN, and its mechanical properties is far superior to the bullet of current metal or combined material structure and holds in the palm.

The structure design is simple and meets various process requirements, the post processing and manufacturing are also considered comprehensively, and the cartridge magazine can be suitable for cartridge magazines with different specifications and different models.

The manufacturing is simple, the operability is strong, and the batch production can be realized quickly. The structure thickness is thin, and the molding quality is good.

The elastic sheet 11 is formed firstly, and then the elastic sheet and the outer cladding 12 are combined to form the bullet holder main body 1, so that the unidirectional fiber is effectively prevented from being wrinkled and buckled in the forming process, and the problem of reduction of mechanical properties caused by unidirectional carbon fiber distortion in the integral forming process of the traditional fan-shaped bullet holder main body is solved.

Example 2

The application also discloses a forming method, which is used for forming the bullet holder in the embodiment 1 and specifically comprises the following steps: paving and pasting the carbon fiber prepreg in a cavity of a spring piece mould, wherein the paving layer is symmetrical about the paving middle plane; combining films, curing and machining to obtain the elastic sheet 11; connecting the plurality of acquired elastic sheets 11 through an adhesive film to form an elastic sheet device; paving an outer cladding layer outside the elastic sheet device, and curing to form the bullet holder main body 1; the multi-petal sabot main body 1 is connected into a sabot.

Specifically, the method comprises the steps of forming the elastic sheet and then forming the bullet holder.

The spring plate forming process comprises the following steps:

step 1: cutting: blanking and cutting are carried out according to the blanking drawing of the elastic sheet; step 2: and (3) storage: the cut prepreg is sequentially placed according to the laying sequence and the serial number and stored by a vacuum bag, the prepreg in the bag is not allowed to be folded, and the cut prepreg is flatly placed or rolled to be placed in a laying area.

And step 3: paving: lay along shell fragment mould die cavity and paste, can lay 6 groups of shell fragments simultaneously, every group 27 layers, 15 whole layers, 12 layers need lose the layer. The layering is symmetrical about the middle plane of the paving, and the layering sequence is the same as that in the table 1. And 4, step 4: and (3) die assembly and curing: and (3) after the upper and lower molds are closed, applying initial pressure of 10 tons, heating the mold for curing, releasing pressure and opening the mold after curing, and demolding. And 5: processing: the blank 200 long is processed to obtain the elastic sheet 11.

And (3) forming the bullet holder main body:

step 1, blanking: blanking according to the outer cladding of the elastomer. Step 2, paving: bonding the processed eleven elastic sheets 11 through adhesive films to form an elastic sheet device, and then paving an outer cladding layer. And step 3, solidifying, demolding and processing to obtain the bullet holder main body 1.

And finally combining the multi-petal sabot main bodies 1 into the sabot.

According to the method, the elastic sheet formed by spreading and pasting the carbon fiber prepreg is adopted, and the outer cladding layer is spread and pasted outside the elastic sheet device, so that the high-strength characteristic of the carbon fiber prepreg can be exerted, and the strength of the bullet holder is ensured; through the form of the combination of the multi-petal cartridge support main body, the production of the cartridge support is convenient.

According to the method, the elastic sheet 11 is formed first, and then the elastic sheet and the outer cladding 12 are combined to form the bullet holder main body 1, so that the unidirectional fibers are effectively prevented from being wrinkled and buckled in the forming process, and the problem of reduction of mechanical properties caused by unidirectional carbon fiber distortion deformation in the integral forming process of the traditional fan-shaped bullet holder main body is solved.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. The composite material bullet holder is characterized by comprising bullet holders formed by connecting multi-petal bullet holder main bodies (1), wherein the bullet holders are provided with bosses meshed with bullets (2) along the direction of a central axis;

the bullet holder main body (1) comprises a spring piece device and an outer cladding layer (12) used for wrapping the spring piece device, the spring piece device comprises a plurality of spring pieces (11) which are sequentially connected, two adjacent spring pieces (11) are connected through adhesive film curing, two outer spring pieces (11) are connected with the outer cladding layer (12) through adhesive film curing, and the outer end of each spring piece (11) is connected with the outer cladding layer (12) through adhesive film curing;

the elastic sheet (11) and the outer cladding layer (12) are both made of carbon fiber prepreg which is laid radially from the center.

2. The composite material bullet holder according to claim 1, characterized in that the layering of the shrapnel (11) is symmetrically arranged along the middle plane of the paving.

3. The composite bullet holder of claim 1 wherein said 0 ° direction of the elastic sheet (11) is at least 50% of the total ply, wherein the 0 ° direction is the length direction of the elastic sheet.

4. The composite bullet holder of claim 3 wherein the ratio of 0 °, 90 °, 45 ° and-45 ° plies is (5-7): (1-3): (1-2): (1-2).

5. The composite material bullet holder according to claim 1, characterized in that said elastic sheet (11) is made by a molding process.

6. A composite material sabot as claimed in claim 1 characterised in that the sabot body (1) is a moulded sabot body.

7. The composite sabot according to claim 1, characterized in that it comprises a two to four-lobed sabot body (1).

8. The composite material sabot according to claim 1, characterized in that the sabot comprises a three-lobed sabot body (1), the sabot body (1) having a 120 ° circular arc configuration.

9. The composite sabot according to claim 1, characterized in that said outer cladding (12) wraps said dome means from three, four or five sides.

10. A method for forming the composite sabot of any of claims 1-9, comprising:

paving and pasting the carbon fiber prepreg in a cavity of a spring piece mould, wherein the paving layer is symmetrical about the paving middle plane;

combining films, curing and machining to obtain the elastic sheet (11);

connecting the obtained plurality of elastic sheets (11) through an adhesive film to form an elastic sheet device;

paving an outer cladding layer (12) outside the spring plate device, and curing to form a spring support main body (1);

the multi-petal sabot main body (1) is connected into the sabot.