RU2613395C1 - Encapsulated case for small arms - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: case has a central hole in the chamber of cap well bottom and a circular recess on the peripheral part of the cap well bottom and a cap primer pressed into it consisting of a metal cap with a pressed into the percussion ignition composition coated with a sealing membrane. Instead a trilobal anvil, a metal ball is applied adjusting with one side to the sealing membrane and with the other—to the case cap well bottom partially being located inside the central hole of such diameter that the metal ball is recessed into the cap well relative to cap head end by an amount "D" equal to the value "C" of the maximum height of the igniter composition with a sealing membrane with account of tolerance, plus an amount of the metal cap wall thickness plus the value "N" specified for the cartridge acording to depth of the cap primer relative to the cap head end within the tolerance. The "A" value of cap well depth is equal to the "B" value of the metal cap height within a tolerance plus the "H" value defined according to the recess of the cap primer with respect to the cap head end within the tolerance. So, the formulas should be implemented: "A"="B"+"C" and "D"="C"+"N". Thus, two or three symmetrically arranged around the circle through holes are made peripherally the cap well bottom.

EFFECT: increased reliability and sensitivity of the cap primer triggering.

3 cl, 1 dwg

Description

The invention relates to the production of capsule shells for small arms and rifled small arms and can be used to produce cartridges for the specified weapon.

The well-known metal sleeve GOST 7921-86 for a cartridge for smooth-bore weapons under the TsBO-N igniter capsule in accordance with GOST 7574-71 of the Berdan type, which is commercially available at the Novosibirsk Metallurgical Plant Spark in Novosibirsk and when encapsulated by the TsBO primer -N according to GOST 7574-71 of the Berdan type, an encapsulated sleeve is formed according to the Berdan system. This encapsulated sleeve is taken as an analogue.

A well-known metal sleeve for a cartridge for small arms under the Berdan type igniter capsule according to GOST B 23241, which is commercially available at the Iskra NMZ OJSC in Novosibirsk and the Murom Instrument-Making Plant JSC and when encapsulated by the Berdan type igniter capsule "According to GOST 23241-91, a capsular sleeve is formed according to the Berdan system. This encapsulated sleeve is taken as an analogue.

These encapsulated cartridges cannot provide a simple method of reloading (reloding) cartridges, since the anvil is located in the center nest of the capsule nest, which does not allow a simple (easy) method to remove the fired (used) igniter capsule from the cartridge case of a small arms.

Known encapsulated sleeve for small arms (article by M. A. Kislin, “AT THE CHAIN OF SPEED. Modernization of cartridges for rifled weapons,” magazine “Kalashnikov”, No. 5/2015). The disadvantage of this encapsulated sleeve is that it uses a three-leaf anvil, which leads to the laborious technology of manufacturing the encapsulated sleeve, and does not provide high reliability and sensitivity of operation of the igniter capsule.

Known encapsulated sleeve for small arms according to the patent of the Russian Federation No. 2525595 with a capsule socket according to the Boxer system, in which there is no shell of an igniter capsule of complex shape, and its role is played by the capsule socket of the sleeve and a special annular protrusion located in the capsule socket of the sleeve, inside the igniter cap there is a three-leaf dome-shaped anvil, which is tightly in contact with the sealing membrane with the top of its dome and the base of the petals abuts against the inside wall of the cap the primer and tightly in contact with a special annular projection located in the socket the sleeve capsule, the presence of a special annular projection at the bottom of the socket forms a capsule around the periphery of the annular recess bottom capsule housing. This embodiment of the design of the encapsulated sleeve and the choice of its geometrical dimensions make it possible to press the anvil onto the special annular protrusion when pressing the igniter capsule into the capsule seat in the absence of an end stop of the capsule igniter cap on the special annular protrusion. This encapsulated sleeve according to the Boxer system has a central opening in the center of the capsule socket, which provides a simple, easy-to-use method for extracting a shot (used) igniter capsule from a cartridge case of a small arms. This design is taken as a prototype.

The disadvantage of the encapsulated sleeve, known by the prototype, is the need to manufacture a complex labor-intensive three-leaf anvil in bulk quantity on press equipment. For this, multi-seat dies are used, which, due to their multi-location, cannot ensure uniform height of the three-leaf anvil. Anvils are usually cold stamped from metal tape. The obtained anvils after preliminary processing (tumbling, degreasing, surface etching, galvanic coating, washing, drying) enter the assembly shop and are sent as a group in caps equipped with impact ignition composition (PF Bubnov and IP Sukhov “Initiation Means” Moscow, 1945. Oborongiz, p. 16, p. 27, 28, p. 41-52). The disadvantages of this method include the fact that it does not provide accurate manufacture of anvils and therefore there is the possibility of falling onto a group assembly of defective anvils with excessive height, which will lead to unacceptable introduction of the anvils into the impact composition, operation of the composition, malfunction of the press tool and shutdown of the process assembly of capsules for repair and maintenance work. In addition, the disadvantages include the need to obtain the most accurate height anvil due to the use of high-precision rolled products with limited mechanical properties and due to the high accuracy requirements for the manufacture of multi-place dies. In this case, it is impossible to achieve uniform sizes of individual punches and dies in a multi-place stamp. In this regard, the design of the encapsulated sleeve, known from the prototype, does not provide high reliability and sensitivity of operation of the igniter capsule due to the lack of the minimum possible approximation of the anvil of the liner to the sealing membrane, which covers the shock-ignition composition of the igniter capsule. Although in the encapsulated sleeve known by the prototype, the influence of large tolerance values on the height of the igniter caps cap on the sensitivity of the igniter caps is eliminated, its sensitivity is significantly affected by the variation in the height of the three-leaf anvil.

The objective of the invention is to simplify the design of the encapsulated sleeve and providing, by changing the structural element, higher reliability and response sensitivity of the igniter capsule, as well as reducing the time from the moment of impact of the striker on the igniter capsule to the operation of the igniter capsule. The problem is solved in that in the design of the encapsulated sleeve for small arms cartridges, consisting of a cartridge case and an igniter capsule pressed into it, consisting of a metal cap with an ignition composition pressed into it, coated with a sealing membrane instead of a three-leaf anvil, it is used as an a metal ball that adjoins the sealing membrane with one side and adjoins the bottom of the capsule hole with the other side and partially fits inside центрального the central hole in the bottom of the capsule socket, which has such a diameter that it is recessed in the capsule socket relative to the end of the sleeve of the sleeve by a value of "D" equal to the value of "C" of the maximum height of the ignition composition of the shock with a sealing membrane, plus the size of the metal wall thickness cap and plus by the value of "N" set on the cartridge in the recess of the igniter capsule relative to the end of the cap of the sleeve to prevent inertial pricking, while the value of "A" depth of the capsule socket p the value “B” of the height of the metal cap, taking into account the tolerance plus the value “N”, set on the cartridge for the recess of the igniter capsule relative to the end of the cylinder head to exclude inertial pricking (that is, two formulas must be fulfilled: “A” = “B” + “H” and “D” = “C” + “H”).

In cases where the design of the encapsulated sleeve is made in such a way that the inequalities occur simultaneously or one at a time: “A” ≥ “B” + “H” and “D” ≥ “C” + “H”, unreasonable removal of one side of the metal ball from the sealing membrane and the inflammatory composition of the shock action of the igniter capsule, which reduces the reliability of operation of the igniter capsule and its sensitivity.

In cases where the design of the encapsulated sleeve is made in such a way that the inequalities occur simultaneously or one at a time: “A” ≤ “B” + “H” and “D” ≤ “C” + “H”, the possibility of an unacceptable introduction of anvil into shock composition, composition triggering, failure of the press tool and stopping the assembly process of the capsule for repair and maintenance work. The predetermined “H” value of the recess of the igniter capsule relative to the end of the cylinder head cap is determined by the design of the weapon for which the cartridge is intended and is associated with the impact on the encapsulated sleeve in the composition of the inertial prick cartridge with a weapon striker. The need to deepen the igniter capsule in the capsule socket of the liner is also justified by GOST B 23241.

The drawing shows the proposed encapsulated sleeve for small arms.

The encapsulated sleeve according to the invention consists of: sleeve - 1; a metal ball - 2; capsule nests - 3; metal cap - 4; igniter composition of shock action - 5; sealing membrane - 6; the central hole in the bottom of the capsule nest - 7; additional holes (two or three) in the bottom of the capsule socket - 8.

The implementation of the encapsulated sleeve according to the invention simplifies the design of the encapsulated sleeve, reduces its complexity, and therefore reduces the cost, increases the reliability of the operation of the igniter capsule, increases the sensitivity and stability of the operation of the capsule igniter in the composition of the liner. At present, the Russian industry produces steel shot for sports shotgun cartridges using the technology of manufacturing high-precision balls for ball bearings (S. G. Mitichkin, G. Mitichkin “Ammunition of a new generation”, Moscow, 1997, printing house “Academy of the Ministry of Internal Affairs of Russia” , p. 50). The accuracy of the outer diameter of the ball (pellet), having a size of 2.5 mm, is ± 50 microns. Such a precision of the diameter of a metal ball is quite acceptable for creating a cheap, technological encapsulated sleeve. According to GOST 3722-81, the Russian industry produces metal balls for rolling bearings with sizes from 0.25 to 6 mm with a deviation of the average ball diameter of only ± 25 microns. It is also possible to use metal balls for bearings manufactured by ball bearing factories in Russia for the manufacture of encapsulated sleeves. The proposed design of the encapsulated shell is very convenient for home reloading (reloding) of small arms cartridges, through the existing central hole 7 in the bottom of the cartridge housing of the cartridge case a shot (used) igniter capsule is knocked out or pressed out of the cartridge case of the small arms together with a metal ball. Then the sleeve can again be encapsulated in the following sequence: either a new metal ball (or used if it has not acquired visible deformations) is installed on the central hole in the bottom of the capsule socket. Then, a metal cap is pressed into the capsular socket with the igniter composition of the shock action pressed into it, covered with a sealing membrane. Before pressing the metal cap into place, it is necessary to measure the value “D” of the drowning of the metal ball in the capsule socket relative to the end of the cap of the sleeve with a special depth indicator, to make sure that two formulas are fulfilled: “A” = “B” + “H” and “D” = “C” "+" N ", taking into account the geometric dimensions of the design of the used igniter capsule, consisting of a metal cap with an igniter composition of shock action pressed into it, covered with a sealing membrane.

When encapsulating sleeves in automatic mode on special lines, it will be necessary to place additional equipment on them - a feeder for metal balls, which will feed metal balls to the central hole in the bottom of the capsule socket of the sleeve. This hole will reliably fix the position of the metal ball during the subsequent automatic operation of pressing the metal caps with the igniter composition of the shock action pressed into them, covered with a sealing membrane.

Currently, drawings have been developed for the proposed options for a capsule shell for small arms and an analysis is being made of the possibility of starting production of such capsule shells, which should increase the manufacturability and quality of cartridges for small arms.

Claims (3)

1. The encapsulated sleeve for small arms, consisting of a sleeve having an annular recess and a central hole in the bottom of the capsule socket along the periphery of the bottom of the capsule socket, and an igniter capsule pressed into it, consisting of a metal cap with a burst igniter pressed into it, coated a sealing membrane, characterized in that a metal ball is placed inside the cap of the igniter capsule, which is adjacent to the sealing membrane with one side and the other it bends to the bottom of the capsule nest, partly placed inside the central hole in the bottom of the capsule nest of the liner, which has such a diameter that the metal ball is recessed in the capsule nest relative to the end of the cap of the liner by a value "D" equal to the value "C" of the maximum height of the igniter composition with a sealing the membrane, taking into account the tolerance, plus the size of the wall thickness of the metal cap and plus the value of "N", set on the cartridge for the recess of the igniter capsule relative to the end of the sleeve cap, taking into account starting, the value “A” of the depth of the capsule socket is equal to the value “B” of the height of the metal cap with allowance for tolerance plus the value “H” set on the cartridge for the recesses of the igniter capsule relative to the end of the cylinder head cap with allowance for (i.e. the following formulas must be fulfilled: “A” = “B” + “H” and “D” = “C” + “H”), while two or three through holes symmetrically arranged around the circumference are made along the periphery of the bottom of the capsule socket. 2. The encapsulated sleeve according to claim 1, characterized in that the metal ball is made using high-precision technology for the manufacture of steel shot for hunting cartridges. 3. The encapsulated sleeve according to claim 1, characterized in that the metal ball is made of the following materials: steel, copper, brass.

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