Internal slotting pre-control fragment warhead based on additive manufacturing

Abstract

The invention discloses an internal slotting and fragment pre-control warhead based on additive manufacturing. The internal slotting and fragment pre-control warhead comprises a shell and a main charge. The shell is a hollow cylinder with two open ends, and a slotting array with regular hexagonal unit cells is arranged between the outer wall and the inner wall of the shell based on additive manufacturing; two sides of each unit cell of the slotted array are parallel to the axis of the shell; the main charge is a solid cylinder, is arranged in the shell and is in interference fit with the shell. Based on the additive manufacturing technology, the prominent advantage of forming a complex structure is fused into the design thought, the internal grooving pre-control fragment warhead is adopted, fragments are pre-controlled along a grooving array in a shell entity, compared with a traditional external grooving pre-control warhead, the aerodynamic configuration and the stability of charging are improved, and the overall performance of the warhead is improved. The number of effective fragments is greatly increased, and the damage power of the bomb is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of pre-controlled fragments, and in particular to an internally slotted pre-controlled fragment warhead based on additive manufacturing. Background Art

[0002] The pre-controlled fragmentation warhead uses methods such as notching the shell to locally weaken the shell, guiding the shell's fragmentation when the high-energy explosive detonates. The resulting fragments of the ideal shape and size are accelerated to have sufficient energy to inflict damage to personnel, vehicles or light armored vehicles, and weapons such as missiles.

[0003] Casing notching is one of the most commonly used pre-control technologies for pre-control warheads. However, due to limitations in material processing and forming technology, existing pre-control fragmentation warheads mostly use subtractive and uniform manufacturing techniques such as machining, remelting, and surface modification. This presents significant limitations in machining and forming complex casing structures. Furthermore, external notching can affect the aerodynamic shape of the projectile, increasing flight resistance or compromising the stability of the explosive. Furthermore, projectile explosion is a complex process, and external notching can lead to fragment connection and a low formation rate, reducing the number of effective fragments. This leaves room for further improvement in destructive capability. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the defects involved in the background technology and provide an internally slotted pre-controlled fragmentation warhead based on additive manufacturing, which retains the complete shape of the shell, improves the aerodynamic shape of the projectile and the stability of the charge, and at the same time increases the fragment formation rate and enhances the destructive capability.

[0005] The present invention adopts the following technical solutions to solve the above technical problems: An internally slotted pre-controlled fragmentation warhead based on additive manufacturing, comprising a shell and a main charge; The shell is a hollow cylinder with two ends open, which is manufactured based on additive manufacturing. A slot array with a regular hexagonal unit cell is provided between the outer wall and the inner wall. The distance between the slot array and the inner wall of the shell is a preset first distance threshold M, and the distance between the slot array and the outer wall of the shell is a preset second distance threshold N; and a unit cell of the slot array has two sides parallel to the axis of the shell; The main charge is a solid cylinder, which is placed in the shell and has an interference fit with the shell.

[0006] As a further optimization solution of the internally slotted pre-controlled fragmentation warhead based on additive manufacturing of the present invention, the bottom diameter of the main charge is 70 mm-80 mm, and the ratio of height to bottom diameter is 2.8.

[0007] As a further optimization solution of the internal slotted pre-controlled fragmentation warhead based on additive manufacturing of the present invention, the side length of the unit cell of the slotted array is 5mm-6mm, and the thickness is 1mm-3mm.

[0008] As a further optimization solution of the internal slotted pre-controlled fragmentation warhead based on additive manufacturing of the present invention, the height of the outer shell is 110㎜-115㎜; M=N, ranging from 1.25㎜-1.5㎜.

[0009] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: The present invention forms complex structures based on additive manufacturing technology and adopts a solution of grooving the inside of the shell. Compared with the traditional method of grooving the outside of the shell with the help of subtractive and equal-material manufacturing technologies such as machining, remelting, and surface modification, it can greatly improve the aerodynamic shape of the shell and the stability of the charge.

[0010] The present invention adopts a slotting scheme different from the existing prefabricated fragment warhead, adjusts the structural characteristics of the shell, and concentrates the energy locally in the slot, effectively improving the fragment forming effect, increasing the fragment forming rate, and further enhancing the destructive capability of the fragment warhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of the present invention; Figure 4 This is a schematic diagram of the structure of the anticipated pre-controlled fragments of the present invention; Figure 5 It is the explosion simulation cloud map of the present invention.

[0012] In the figure, 1-outer wall of the shell, 2-inner wall of the shell, 3-main charge, 4-slot array. DETAILED DESCRIPTION

[0013] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings: The present invention can be implemented in many different forms and should not be considered to be limited to the embodiments described herein. On the contrary, these embodiments are provided to make this disclosure thorough and complete and will fully convey the scope of the invention to those skilled in the art. In the accompanying drawings, components are enlarged for clarity.

[0014] like Figure 1 As shown, the present invention discloses an internally slotted pre-controlled fragmentation warhead based on additive manufacturing, comprising a shell and a main charge; like Figure 2As shown, the shell is a hollow cylinder with two ends open, which is manufactured based on additive manufacturing, and a slot array with a regular hexagonal unit cell is provided between the outer wall and the inner wall; The distance between the slot array and the inner wall of the shell is a preset first distance threshold M, and the distance between the slot array and the outer wall of the shell is a preset second distance threshold N; and the unit cell of the slot array has two sides parallel to the axis of the shell, such as Figure 3 As shown; The main charge is a solid cylinder, which is placed in the shell and has an interference fit with the shell.

[0015] The bottom diameter of the main charge is 70 mm to 80 mm, and the ratio of height to bottom diameter is 2.8.

[0016] The side length of the unit cell of the slotted array is 5mm-6mm, and the thickness is 1mm-3mm.

[0017] The height of the outer shell is 110㎜-115㎜; M is preferably equal to N, ranging from 1.25㎜-1.5㎜.

[0018] The present invention adjusts the structural features of the shell to concentrate the energy in the slot, effectively improving the formation effect of the fragments. Figure 4 As shown in the figure, the fragment formation rate is improved, and the destructive capability of the fragment warhead is further enhanced. Figure 5 shown.

[0019] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which this invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such, will not be interpreted in an idealized or overly formal sense.

[0020] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An internally slotted pre-controlled fragmentation warhead based on additive manufacturing, characterized in that: including the shell and main charge; The shell is a hollow cylinder with two ends open, which is manufactured based on additive manufacturing. A slot array with a regular hexagonal unit cell is provided between the outer wall and the inner wall. The distance between the slot array and the inner wall of the shell is a preset first distance threshold M, and the distance between the slot array and the outer wall of the shell is a preset second distance threshold N; and a unit cell of the slot array has two sides parallel to the axis of the shell; The main charge is a solid cylinder, which is placed in the shell and has an interference fit with the shell.

2. The internally slotted pre-controlled fragmentation warhead based on additive manufacturing according to claim 1 is characterized in that: The bottom diameter of the main charge is 70 mm to 80 mm, and the ratio of height to bottom diameter is 2.

8.

3. The internally slotted pre-controlled fragmentation warhead based on additive manufacturing according to claim 1, characterized in that: The side length of the unit cell of the slotted array is 5mm-6mm, and the thickness is 1mm-3mm.

4. The internally slotted pre-controlled fragmentation warhead based on additive manufacturing according to claim 1, characterized in that: The height of the outer shell is 110㎜-115㎜; M=N, ranging from 1.25㎜-1.5㎜.

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