Design and manufacturing scheme of composite material lightweight sabot

Abstract

The invention discloses a design and manufacturing scheme of a composite lightweight sabot. The composite lightweight sabot comprises a shell 1, a mandrel 2, a structural adhesive 3 and a core material 4. The shell 1 is made of chopped carbon fiber reinforced engineering plastics, and in order to further reduce the weight, the shell 1 structurally adopts a hollow design and is filled with the core material 4 to supplement the strength. The mandrel is formed by high-modulus carbon fiber mold pressing or multi-axis continuous fiber 3D printing, and the overall deformation is smaller than 0.3 mm under the control emission condition. The shell 1 and the mandrel 2 are connected in a meshed mode, and in order to improve the stability, the shell 1 and the mandrel 2 are connected in a glued mode. The light weight design requirement is met, and the weight is reduced by at least 3.6 Kg compared with the whole set of cast aluminum structure. The high-strength and high-modulus carbon fiber material is adopted as a whole, the structural strength is better than that of aluminum alloy, and under the condition that the chamber pressure is certain, the launching speed, the firing range and the penetrating blasting capacity of the projectile can be remarkably increased.

Description

Technical Field

[0001] In order to improve the lethality and armor-piercing capabilities of kinetic energy bullets, an important method is to use large-caliber guns to fire small-caliber bullets, that is, sub-caliber bullets. To make sub-caliber bullets suitable for large-caliber weapons, a sabot must be used. The sabot structure has a considerable impact on the power, effective range, density, gun life, and safety of rod-type armor-piercing projectiles. The sabot of the discarding sabot is located between the gun chambers. It is a structural component with a very complex force, so the sabot must have a certain launch strength to ensure that it remains intact under the worst chamber pressure conditions and does not break, so as to correctly guide the projectile to move in the chamber. Background Art

[0002] The sabot is pushed by the gunpowder gas, forcing the projectile with the sabot to move in the bore. In the bore, most of the force applied to the sabot by the base pressure will be transmitted to the spring rod. The transmission of this force must be completed by the contact surface between the sabot and the projectile, which can be in the form of annular grooves, threads, friction surfaces, etc. Obviously, the role of the contact surface is very important, and in-depth and detailed research must be carried out to design a reliable meshing structure.

[0003] The core is the active part of the armor-piercing projectile. It is used to hit the target and exert its lethality. The sabot is an important part of the armor-piercing projectile, but it belongs to the "non-combat part" and its mass is a negative mass. Under the condition of ensuring the intensity of the launch, the lighter the mass, the better. Under the same conditions, the greater the kinetic energy obtained by the projectile, the higher its speed, and the greater its armor-piercing power. Summary of the invention

[0004] The patent of this invention optimizes the lightweight design and manufacturing process of the composite material support, adopts high modulus carbon fiber molding or multi-axis continuous fiber 3D printing as the core shaft part, and the shell part adopts a hollow structure. On the premise of meeting the strength and structural stability, high-strength and high-modulus short-cut carbon fiber reinforced engineering plastic injection molding is used, and the shell and the core shaft are meshed and bonded. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 This is a detailed structural diagram of the composite lightweight support: Among them: 1. shell, 2. mandrel, 3. structural adhesive, 4. core material.

Claims

1. A design and manufacturing scheme for a composite lightweight support that meets the requirements of lightweight design and reduces the weight of the entire set by at least 3.6Kg compared to the cast aluminum structure. The entire structure is made of high-strength, high-modulus carbon fiber material, and its structural strength is better than that of aluminum alloy. Its characteristics are: The shell 1 and the core shaft 2 are connected by meshing, and a structural adhesive 3 is added between the shell 1 and the core shaft 2 or co-cured.

2. The composite material lightweight support design and manufacturing scheme according to claim 1 is characterized in that The shell 1 adopts a hollow design in structure, and is made of short-cut fiber reinforced engineering plastics by injection molding.

3. The composite material lightweight support design and manufacturing scheme according to claim 1 is characterized in that The core shaft 2 is made of ultra-high modulus carbon fiber material, which is compression molded or continuous fiber 3D printed.

4. The composite material lightweight support design and manufacturing scheme according to claim 1 is characterized in that Carbon fiber composite material is compression molded, and the mold is made of Invar steel MJ36 and 45# steel.

5. The composite material lightweight support design and manufacturing scheme according to claim 1 is characterized in that In order to further reduce the weight of the structure, a core material 4 is filled to supplement the strength, and the material is PMI, metal honeycomb, etc.

6. The design and manufacturing scheme of the composite material lightweight support according to claims 1, 2, 3, 4, and 5.

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