A variable-diameter pressing and forming device for explosives

A technology of pressing and forming explosives, which is applied in the field of variable-diameter pressing and forming devices for explosives, which can solve the problems of low charge density, difference in radial maximum density, poor density uniformity, etc., and achieve the goal of improving charge quality and reducing radial density difference Effect

Active Publication Date: 2021-10-08
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common feature of the above two processes is that due to the limitation of the diameter of the mouth of the projectile, the punch can only exert pressure on the center of the powder during pressing, and the periphery is basically formed by extrusion, resulting in poor density uniformity and poor powder charge. low density
After the 155mm anti-explosive bomb is filled with press-packed mixed explosives, the maximum radial density difference can reach about 8%, which seriously affects the filling quality of the whole bomb

Method used

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  • A variable-diameter pressing and forming device for explosives
  • A variable-diameter pressing and forming device for explosives
  • A variable-diameter pressing and forming device for explosives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this example, the compression molding of the aluminum-containing mixed explosive molding powder is mainly carried out. The mixed explosive code is JHL-7, which is composed of RDX, aluminum powder, EVA, paraffin, etc., and has a theoretical density of 1.83g.cm -3 . The filling shell is a 120mm special-shaped warhead, with a mouth diameter of 50mm, a bottom diameter of 100mm, and a charge height of 300mm. Choose a variable diameter punch with a variable diameter of 40mm to 80mm, combined with a 200T press, and a pressing pressure of 200Mpa.

[0051] As a comparison, the prior art 1 is a step-by-step press-fitting process, using a 200T press, a punch diameter of 40mm, and a pressing pressure of 200MPa;

[0052] As a comparison, prior art 2 is a step-by-step press-fitting process, using a 2915-type step-by-step press-fitting machine with a screw diameter of 40 mm.

[0053] Density uniformity analysis: measure the axial and radial density difference of the powder column...

Embodiment 2

[0061] In this example, the press molding of the aluminum-containing mixed explosive molding powder is mainly carried out. The mixed explosive code name is JHL-7, which is composed of RDX, aluminum powder, EVA, paraffin, etc., and has a theoretical density of 1.83g cm -3 . The filling shell is a 155mm special-shaped warhead, with a mouth diameter of 70mm, a bottom diameter of 140mm, and a charge height of 600mm. Choose a variable diameter punch with a variable diameter of 60mm to 120mm, combined with a 200T press, and a pressing pressure of 200Mpa.

[0062] As a comparison, the prior art 1 is a step-by-step press-fitting process, using a 200T press, a punch diameter of 60mm, and a pressing pressure of 200MPa;

[0063] As a comparison, prior art 2 is a step-by-step press-fitting process, and a 2915-type step-by-step press-fitting machine is selected, with a screw diameter of 60 mm.

[0064] Density uniformity analysis: measure the axial and radial density difference of the po...

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Abstract

The invention discloses a variable-diameter pressing molding device for explosives, which includes an explosion-proof servo motor, a motor fixing bracket, a synchronous belt, a fixing plate, an upper fixing cylinder, a lower fixing cylinder, a transmission turntable, an outer fixing cylinder, a push rod, an extended fixing cylinder, a variable Diameter punch, filling disc, outsourcing rubber sleeve. The action to realize the diameter reduction is: the explosion-proof servo motor drives the timing belt after the forward rotation, and the timing belt drives the push rod through the transmission turntable. Stretch it, and the end of the punch fits with the filling disc through the limit groove, so as to increase the contact area between the punch and the powder surface. The present invention is applicable to the compression molding of the explosive molding powder, through the increase of the diameter change of the punch in the projectile body and the actual contact area when the powder is pressed, thereby effectively reducing the radial density difference of the charge axis of the projectile body and improving the charge quality. It is especially suitable for charge of warheads with "small mouth and big belly" special-shaped structure.

Description

technical field [0001] The invention relates to a new type of explosive pressing and molding device, in particular to a variable-diameter pressing and molding device for explosives, which is combined with an ordinary press and applied to high-quality molding of mixed explosive molding powder and filling of warheads with special-shaped structures. Background technique [0002] The charge density distribution of the projectile is one of the key indicators of the charge quality. Increasing the charge density around the projectile body and reducing the density difference with the center charge density can increase the charge amount, thereby enhancing the lethal power of the ammunition; In addition, reducing the density difference helps to improve the safety of the ammunition during firing, thereby improving the comprehensive performance of the ammunition. [0003] For the warhead with a regular filling structure of the press-packed mixed explosive, according to the diameter of t...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C06B21/00
CPCC06B21/0075
Inventor刁小强王晓峰邢晓玲李文祥韩仲熙
OwnerXIAN MODERN CHEM RES INST