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Transition layer material, application and process for improving internal stress of charge of warhead

A transitional layer and warhead technology, applied in the direction of explosives, ammunition, non-explosive/non-thermal agent components, etc., can solve the problems of ammunition launch safety hazards, chamber explosion, etc., to eliminate charge defects, easy compression deformation, Effect of reducing or charging defects

Active Publication Date: 2022-05-10
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Charging defects may cause the chamber to explode during the shelling process, which poses a serious safety hazard to the firing safety of the ammunition

Method used

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  • Transition layer material, application and process for improving internal stress of charge of warhead
  • Transition layer material, application and process for improving internal stress of charge of warhead
  • Transition layer material, application and process for improving internal stress of charge of warhead

Examples

Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of the transition layer material is as follows: add butadiene rubber and ethylene-vinyl acetate copolymer into a beaker, add an appropriate amount of petroleum ether solvent, heat and stir to dissolve, add aluminum powder after completely dissolving, stir and mix evenly from Pour it out from the beaker, and after the solvent volatilization material is muddy or viscous, pass through an 8-12 mesh sieve or a granulator to prepare granular materials for later use.

[0036] combined with figure 1 As shown, the present invention uses the transition layer material to improve the internal stress process of the special-shaped warhead charge, including:

[0037] Choose a special-shaped warhead simulation bomb with a mouth diameter φ1 of 40-80mm, a bottom diameter φ2 of 80-120mm, and a height of 150-300mm, and fight against the mouth of the warhead simulation bullet with a special-shaped structure. The pressure sensor is assembled on the bottom of the simul...

Embodiment 1

[0040] This embodiment discloses a transition layer material, including the following raw material components: in terms of mass percentage, 20% of composite modified material, 80% of metal powder; the composite modified material is made of butadiene rubber and ethylene-vinyl acetate copolymer The substance is composed of a mass ratio of 3:1.

[0041] The transition layer material disclosed in this embodiment is used to improve the internal stress of the special-shaped warhead charge.

[0042] Further, the process of using the transition layer material to improve the internal stress of the special-shaped warhead charge includes:

[0043] combined with figure 1 As shown, the selected mouth diameter φ1 is 40mm, the bottom diameter φ2 is 80mm, and the height is 150mm of special-shaped structure warhead simulation projectile, and the body mouth of the special-shaped structure warhead simulation projectile and the special-shaped structure warhead simulation projectile A pressure s...

Embodiment 2

[0053] In the present embodiment, select mouth diameter φ1 to be 80mm, bottom diameter φ2 is 120mm, and height is 300mm special-shaped warhead simulation projectile, and the projectile body mouth and special-shaped structure warhead of described special-shaped structure warhead simulation projectile A pressure sensor is assembled at the bottom of the simulated bomb; then 200g of the transition layer material is placed at the bottom of the warhead simulated bomb with a special-shaped structure, and the RL-F explosive charge is carried out by a step-by-step pressing process. The pressing process parameters: pressure 150Mpa, divided into five times Compression, the amount of explosives for each compression in the first three times is 1200g, and 700g in the last two times, and the final average charge density is controlled to 1.7g / cm 3 . In an embodiment, the total charge is 5000g.

[0054] The transition layer material selected in this embodiment includes the following raw mater...

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Abstract

The invention discloses a transition layer material, application and a process for improving internal stress of warhead charge, and the transition layer material comprises the following raw material components in percentage by mass: 10%-30% of a composite modified material and 70%-90% of metal powder, the composite modified material is composed of butadiene rubber and an ethylene-vinyl acetate copolymer in a mass ratio of (1-5): 1; the metal powder is ball-milled aluminum powder, and the particle size of the metal powder is 40-60 microns. According to the transition layer material disclosed by the invention, the selected composite modified material consisting of butadiene rubber and ethylene-vinyl acetate copolymer and the ball-milled aluminum powder are common materials for mixed explosives, are wide in source and have good compatibility with the explosives and a shell; the transition layer material has the characteristics of small modulus and easy compression deformation, and can effectively reduce the explosive loading internal stress generated in the temperature test process of the warhead of the special-shaped structure; therefore, the purpose of reducing or eliminating the charging defects is achieved. And the method is suitable for high-quality charging of the composite explosive in the special-shaped structure projectile body.

Description

technical field [0001] The invention relates to a transition layer material, which can be used to fill the bottom of a warhead with a special-shaped structure, and can effectively improve the internal stress of the charge compared with the warhead charge without the transition layer. Background technique [0002] For warheads with special-shaped structures, especially the "small mouth and big belly" warheads of anti-explosive ammunition as a typical example, after the warhead charges pass the high-temperature test, charge defects such as bottom gaps or cracks often appear. The reason is that during the heating process of the projectile, the thermal expansion of the charge occurs, and its internal expansion stress reaches more than tens of MPa, which acts on the cushion on the top of the projectile to cause the cushion to compress and deform. At the same time, the charge on the projectile The interior moves upwards relative to the shell. Since the top of the shell is a closed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B27/00C06B23/00C06B25/34F42B33/02
CPCC06B27/00C06B25/34C06B23/00F42B33/025
Inventor 刁小强陶俊王晓峰徐洪涛方学谦戴致鑫邢晓玲韩仲熙
Owner XIAN MODERN CHEM RES INST
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