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Explosive compression forming process

A compression molding and explosive technology, which is used in explosive processing equipment, explosives, offensive equipment, etc., can solve the problems of large stress gradient, reduce the pressing pressure of explosives, and increase the process cycle, so as to ensure the integrity and reduce the stress. Effect

Active Publication Date: 2020-12-11
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 forming process. The process comprises the step of: performing explosive compression by adopting an explosive compression forming mold; the step of performing explosive compression by adopting the explosive compression forming mold further comprises the four steps of assembling the explosive compression forming mold, performing explosive compressionmolding, demolding and shaping. Normal-temperature compression is performed under a vacuum condition, a downward pressing punch is started in a demolding process, the pressure of an upward pressing punch is kept at 100Pa-300Pa through the downward pressing punch; a female mold is lifted; a base and the downward pressing punch are removed; and an explosive is extruded through the upward pressing punch, so that the demolding of the explosive is finished. According to the xplosive compression forming process of the invention, the problem of crack damage caused by demolding during high-specific-pressure molding of the explosive is solved, cold-pressing high-specific-pressure molding of the low-specific-pressure molded explosive can be realized, the fracture-resistant pressure of an explosivecolumn is increased by 100MPa, and the quality of the surface of the explosive and the 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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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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