Design method of small-part-number single-hole propellant powder mold

A design method and technology of single-hole charge, which is applied in the direction of explosive processing equipment, explosives, offensive equipment, etc., can solve the problems of propellant eccentric holes, eccentric holes, large differences in propellant powder types, etc., and achieve the effect of improving stability

CN107673942AActive Publication Date: 2018-02-09XIAN MODERN CHEM RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-02-09

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Abstract

The invention discloses a design method of a small-part-number single-hole propellant powder mold, which is applicable to designing of a single-hole mold in explosive manufacturing. The invention provides a design method of a small-part-number single-hole explosive extrusion molding mold, aiming at the problems in a current explosive manufacturing process that the difference between the design size of an adopted single-hole molding mold and the size of an explosive form of an explosive product is great and a needle diameter is too small so that explosive cannot be loaded into a hole in a molding process. A diameter-changing mold needle is utilized so that the difficulties that the needle diameter is too small in the molding process and the mold needle is deviated so that propellant powdercannot be loaded into the hole are overcome; when a mold size design method is adopted, the design size of the molding mold is matched with the explosive form of the explosive product, and the qualitystability of a propellant powder finished product is greatly improved.
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Description

technical field

[0001] The invention relates to a design method of a mold for forming a single-hole powder column, which is suitable for gunpowder. Background technique

[0002] Generally speaking, the needle diameter of a single-hole propellant mold is very small. For example, the needle diameter of a 2 / 1 propellant mold is less than 0.15mm. Such a small mold needle diameter brings great difficulties to mold processing, resulting in mold waste products. High rate. Secondly, due to the small diameter of the needle, the ability of the mold needle to withstand the radial extrusion force of the material in the propellant forming process is very poor. hole phenomenon, which affects the quality of the propellant. In order to solve the problem of the upper hole, in the propellant preparation process, the method of using the mold with a needle sleeve is adopted. The outer diameter of the needle sleeve hole is closely matched with the inner diameter of the mold forming section. Usi...

Examples

Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Thickness of combustion layer of propellant product 2e 1b and aperture d k It is determined by the size of propellant product or test sample, and is a known condition parameter.

[0032] The parameter design of single-hole propellant powder compression-stretching molding mold is mainly to carry out the mold needle diameter d 1 、d 2 、d 3 , needle length L 1 , L 2 , L 3 , the design of parameters such as the inner diameter D of the mold sleeve and the area A of the feed port.

[0033] Example: It is necessary to prepare the combustion layer thickness 2e 1b 0.30mm, propellant aperture d k is a three-base propellant of 0.15mm, in order to simplify the calculation, the propellant shrinkage rate η e with η d Take the equality as 10%. Die design according to the present invention is as follows:

[0034] Table 1 Calculation example of single-hole ...