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Explosive compression molding process

A technology of pressing and forming explosives, which is applied in the direction of explosives processing equipment, explosives, offensive equipment, etc., can solve the problems of large stress gradient, reduce the pressing pressure of explosives, breakage, etc., and achieve the effect of ensuring integrity, reducing stress and releasing quickly

Active Publication Date: 2021-10-01
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this type of explosives, due to the large stress gradient during the pressing process, stress concentration occurs, resulting in cracks or even fractures when the specific pressure is high, and it is impossible to achieve high specific pressure pressing molding, and reducing the pressing pressure of explosives, not only the density of explosives is low, And the mechanical properties of explosives are poor
At present, for low specific pressure shaped explosives, another measure is mainly to adopt the hot pressing process, which greatly increases the process cycle and reduces the safety.
Therefore, the existing process cannot be applied to the normal temperature compression molding of low specific pressure shaped explosives under high specific pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to the above-mentioned technical scheme, this embodiment provides an explosive compression molding process, which includes the use of an explosive compression molding mold for explosive compression. The explosive compression molding mold includes a base 4, a base 3 and a female mold 2 arranged on the base 4 in sequence , the female mold 2 is sleeved on the base 3, and the top of the female mold 2 is pierced with an upper pressure punch 1 coaxial with the female mold 2, and the female mold 2 can move axially relative to the upper pressure punch 1 and the base 3, A downward pressure punch 5 that can generate upward pressure is installed in the base 4 along the axial direction, and the upward pressure punch 1 and the downward pressure punch 5 generate relative pressure to suppress the explosive 6;

[0034] The shape of the upper pressure punch 1 is the shape of a cylinder and the round table integrally formed, the cylinder is connected with the upper bottom surfac...

Embodiment 2

[0057] The same as Example 1, the difference is that the present invention is used to suppress JH-14 explosive 6 molding powder, the dose is 3g, the upper pressing punch 1 is designed to be beryllium bronze, the inner angle α is 27°, and the size of the rounded angle β is r0. 5. The diameter difference between the base section and the lower bottom surface of the upper press punch section is 0.5% of the center diameter of the explosive section;

[0058] In step 3, the pressure of the upper pressure punch 1 is reduced to 100 Pa, and the upper pressure punch 1 is fixed; the pressure of the upper pressure punch 1 is maintained at 100 Pa by the lower pressure punch 5; the female mold 2 is lifted by the hanging lug 2-1, and the lifting distance is The length of the explosive 6 is 0.5%, 0.5mm, and the lifting rate is less than 1mm / min; the compressed powder column is complete, and the surface of the explosive 6 and the internal quality of the explosive 6 are intact.

Embodiment 3

[0060] Same as Example 1, the difference is that the present invention is used to suppress JH-14 explosive 6 molding powder, the dose is 3g, and the upper pressing punch 1 is designed to be beryllium bronze, the inner angle α is 67°, and the size of the rounded angle β is r2, The diameter difference between the base section and the lower bottom surface of the upper punch subsection is 0.6% of the central diameter of the explosive section.

[0061] In step 3, the pressure of the upper pressure punch 1 is reduced to 150Pa, and the upper pressure punch 1 is fixed; the pressure of the upper pressure punch 1 is maintained at 150Pa by the lower pressure punch 5; the female mold 2 is lifted by the hanging lug 2-1, and the lifting distance is The length of the explosive 6 is 0.6%, 0.6mm, and the lifting rate is less than 1mm / min; the compressed powder column is complete, and the surface of the explosive 6 and the internal quality of the explosive 6 are intact.

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Abstract

The invention discloses an explosive compression molding process, which comprises the use of an explosive compression molding mold for explosive compression, including four steps of assembling the explosive compression molding mold, explosive compression molding, ejection and shaping, pressing at room temperature under vacuum conditions, and starting during the ejection process Press down the punch, keep the pressure of the up-pressing punch at 100Pa to 300Pa through the down-pressing punch, lift the die, remove the base and the down-pressing punch, squeeze the explosive through the up-pressing punch, and complete the ejection of the explosive. The invention solves the problem of crack damage when the explosive is molded at a high specific pressure, can realize low specific pressure forming explosive cold pressing and high specific pressure forming, the bursting pressure of the explosive column is increased by 100 MPa, and the explosive surface and internal quality of the explosive are intact.

Description

technical field [0001] The invention relates to the technical field of propellant and explosive molding, in particular to an explosive compression molding process, and in particular to a molding process for increasing the explosive molding threshold pressure. Background technique [0002] The press-packing process is one of the widely used charging methods in ammunition charging, which has the advantages of wide application range and short production cycle. The press molding device, also known as the press mold, is an important process equipment in the press process. The technological process of press-packing explosives includes: weighing-loading-pressing-powder-removing the mold. In order to solve the safety accidents in the explosive pressing process, the existing explosive pressing die is identical or similar to the design of the pressing die reported in the document "Mould Design for Two-way Compression of Charged Charge" (Ordnance Industry Automation, 201301 issue). I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B21/00
CPCC06B21/0041
Inventor 席鹏王晓峰陶俊封雪松贾铭孙立鹏
Owner XIAN MODERN CHEM RES INST
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