Novel processing device and processing technology for preparing grain through composite casting

Abstract

The processing device comprises an inflation pressurization assembly, a riser funnel and a grain forming mold, the inflation pressurization assembly is composed of an air storage tank, a pressure gauge and an air valve, an observation window is formed in the top of the air storage tank, the pressure gauge is arranged on the side wall of one side of the air storage tank, and the air valve is arranged on the side wall of the other side of the air storage tank. And an air valve is arranged on the side wall of the other symmetrical side. The device has the advantages that the safety degree is high in the slurry mixing process, the mixing uniformity is good, the grain density is high, the charging defects such as coarse crystals, shrinkage cavities, air holes and cracks in the grain forming process are avoided, the grain quality is good, the production efficiency is high, the application range is wide, grains with the diameters ranging from 50 mm to 500 mm can be manufactured, and the production cost is low. Fine, safe and efficient preparation of the high-solid-content and high-density fused cast explosive column is achieved, the process technical problem that the mixing safety of high-viscosity and high-energy fused cast explosives and the casting forming quality of the explosive column are affected is solved, and the charging requirement of a conventional efficient damaged ammunition warhead is met.

Description

technical field [0001] The invention belongs to the technical field of preparation of grains in the charging of ammunition warheads, and in particular relates to a novel processing device and process for preparing grains by composite melting and casting. Background technique [0002] Warhead charging refers to processing explosives into powder columns with a certain shape, certain strength, and certain density, and fixing them in the warhead; explosives can also be directly loaded into the warhead and processed into a charge that meets the requirements. It is called "indirect charge", and the latter is called "direct charge". The currently commonly used charging methods are: melting and casting charging method, press charging method, spiral charging method, step-by-step pressing charging method, plastic charging method, and pouring charging method. Among them, the melting and casting charging method is to melt the solid explosive into a liquid state, inject it into the proj...

AI Technical Summary

Problems solved by technology

Moreover, if the viscosity of the slurry is high, a large number of air bubbles will be mixed into the explosive during the mixing process, resulting in a decrease in the density of the mixed explosive. The actual density of the explosive column can only reach 95% of the theoretical density, and the density uniformity is poor. The density deviation is only ±0.010g / cm3, which affects the strength of the grain after the slurry is cured, and the quality of the grain is difficult to guarantee

If the content of the high-energy solid-phase explosive in the molten-cast mixed explosive is increased to more than 80%, the power of the explosive can be increased by more than 20%, but then the dynamic viscosity of the explosive slurry will reach more than 2300Pa·s, resulting in The various components are difficult to mix uniformly, the charge process is poor, and the powder column is difficult to cast, which seriously affects the process and safety of explosive mixing and casting; usually in the process of preparing the powder column by the melting and casting charge method, the liquid explosive is injected into the powder column to form After the mould, the phase transition process from liquid phase (cooling) to solid phase is difficult to control, so coarse crystals, shrinkage cavities, pores, and cracks will occur, the charge density is low, and the quality of the grain is difficult to control. The workmanship is poor, and special solutions are required to overcome the defects caused by the common casting process.

Moreover, the maintenance time of the pharmaceutical column by the melting and casting method is long, usually 2 to 3 days, resulting in a long production cycle of the pharmaceutical column and low production efficiency.

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