EP3137845B1 - Cartridge with safety fuse in the drive system, and method for producing it - Google Patents

Cartridge with safety fuse in the drive system, and method for producing it Download PDF

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Publication number
EP3137845B1
EP3137845B1 EP15717885.6A EP15717885A EP3137845B1 EP 3137845 B1 EP3137845 B1 EP 3137845B1 EP 15717885 A EP15717885 A EP 15717885A EP 3137845 B1 EP3137845 B1 EP 3137845B1
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EP
European Patent Office
Prior art keywords
plug
casing bottom
bottom opening
cartridge
casing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP15717885.6A
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German (de)
French (fr)
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EP3137845A1 (en
Inventor
Hendrik REDEKER
Willi Luebbers
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Rheinmetall Waffe Munition GmbH
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Rheinmetall Waffe Munition GmbH
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Priority to PL15717885T priority Critical patent/PL3137845T3/en
Priority to SI201530375T priority patent/SI3137845T1/en
Publication of EP3137845A1 publication Critical patent/EP3137845A1/en
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Publication of EP3137845B1 publication Critical patent/EP3137845B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/20—Packages or ammunition having valves for pressure-equalising; Packages or ammunition having plugs for pressure release, e.g. meltable ; Blow-out panels; Venting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/001—Devices or processes for assembling ammunition, cartridges or cartridge elements from parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/04—Fitting or extracting primers in or from fuzes or charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/083—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap

Definitions

  • the invention relates to a cartridge with a drive system and a projectile connected to the drive system.
  • the propulsion system includes a propellant charge case filled with a propellant charge having a sleeve bottom containing a substantially axially extending sleeve bottom opening with a T-shaped edge contour.
  • the sleeve bottom opening is closed by a T-shaped stopper which receives a primer cap and which is held in this position by a fuse ring of a bursting device in the case bottom opening.
  • Such cartridges are for example from the document DE 10 2011 014 402 A1 known. This document forms the starting point for the invention. These are preferably cartridges whose bullet caliber is in the middle caliber range, preferably between 35 mm and 40 mm.
  • a cartridge ammunition which provides discharge channels between a drive chamber and the exterior of the cartridge case, wherein the discharge channels are filled with a fusible material.
  • the melting material has a lower melting point than the ignition temperature of the ignition device and the propellant charge. If the ambient temperature of the cartridge shell rises above the melting point of the melt material, it melts and releases the discharge channels, so that the propellant charge burns off later without any pressure build-up.
  • the US 2012/0204750 A1 describes a pressure relief system for a cartridge
  • the US 2003/0205161 A1 discloses a method and apparatus for releasably securing a closure panel to a housing.
  • a bursting device In order to avoid that in the case of a fire, for example in an ammunition depot, an explosion of such cartridges can occur, they each contain a bursting device.
  • These consists essentially of a pressure relief opening formed by the sleeve bottom opening and the fuse ring acting as a fuse.
  • the fuse ring is supported with its sleeve bottom facing the back of a projection of the case bottom and limited with its front the propellant charge space.
  • the primer-containing plug is inserted from the back of the case bottom into the case bottom opening and is retained within the case bottom opening by the fuse ring.
  • the front end of the plug neck has a widening, which engages behind the fuse ring on the drive charge side.
  • the fuse ring is made of a pressure-resistant material whose melting point is lower than the lowest ignition temperature of the primer's pyrotechnic primer and propellant charge powder so that in the event of fire, the fuse ring first melts before the primer cap can ignite and the plug disengages and releases the pressure relief port ,
  • the fuse ring is inserted from the bullet of the cartridge facing the front of the propellant charge sleeve in the interior. This complicates the assembly of cartridges, especially with long propelling pods and smaller caliber.
  • the propellant charge is also filled only after the assembly of the fuse ring in the propellant charge sleeve and the bullet only then connected to the propellant charge sleeve.
  • the invention has for its object to provide a cartridge of the type mentioned above, which is easier than comparable known cartridges mountable, and in the case of the launch of the cartridge damage to the fuse ring is reliably avoided.
  • a method for assembling the cartridge will be disclosed.
  • the invention is based essentially on the idea of not arranging the fuse ring at the propellant charge end of the plug neck in the propellant charge case, but between the front of the plug header and the back of a subsequent inside protrusion of the case bottom, such that the propellant charge space is not penetrated by the fuse ring is limited only by the front surface of the stopper neck.
  • the plastically deformable fuse ring has an outer diameter which is chosen such that it can be used for mounting from the outside of the sleeve bottom in the sleeve bottom opening.
  • the fuse ring In the mounted position of the cartridge, the fuse ring is plastically deformed by the axial force exerted thereon by the head portion of the plug, such that its inner edge is positively and / or non-positively deformed into an outer groove-shaped recess of the plug and its outer edge. or engages positively in an inner groove-shaped recess of the sleeve bottom.
  • the fusible link ring is mounted from the back of the case bottom allows for reliable, quick assembly regardless of the length of the cartridge and the caliber of the cartridge. The assembly is now no longer from the inside but from the outside.
  • the plug with the ring is pressed into the sleeve, the ring axially compressed, so that it expands radially and anchored in the propellant charge sleeve and the stopper.
  • the head portion 7 is acted upon in the direction of the fuse ring 13 by an axial force, the front 17 of the fuse ring 13 on the back 11 of the inside projection 12 and the back 18 of the fuse ring 13 on the front 10 of the head part 7 of the plug 6, so that the fuse ring 13 is compressed and plastically deformed.
  • the material of the fuse ring 13 flows radially into a groove-shaped recess 15 of the plug 6 and into a groove-shaped recess 16 of the sleeve bottom 4 (FIG. Fig.2 ).
  • the inner edge 19 of the fuse ring 13 now engages positively and non-positively in the outer groove-shaped recess 15 of the plug (6), and the outer edge 20 of the fuse ring engages positively and non-positively in the inner groove-shaped recess 16 of the sleeve bottom 4.
  • the plug 6 is fixed within the sleeve bottom opening 5, without there being any appreciable loading of the fuse ring 13 by the propellant charge gases in the event of a later firing.
  • the fuse ring 13 melts before it ignites the primer cap 9 or the propellant charge powder and the plug 6 is released so that it ignites after the ignition of the propellant charge 2 Propellant gases is pushed out of the Hüisenbodenö réelle 5 without significant speed.
  • the assembly of the drive system 1 is in turn simplified.
  • the primer 9 is inserted into the plug 6.
  • the fuse ring 13 is used. Then the unit plug 6 and primer 9 is pressed with axial force in the propellant charge case 3.
  • the fuse ring 13 is compressed in height, so that the material plastically deformed and flows radially into the groove-shaped recesses 15 on the propellant charge case 3 and plug 6. By this compression is also given a seal against external environmental influences. The deformation of the fuse ring 13 generates a secure holding force against the forces occurring during transport, vibration and bombardment.

Description

Die Erfindung betrifft eine Patrone mit einem Antriebssystem und einem mit dem Antriebssystem verbundenen Geschoss. Das Antriebssystem umfasst eine mit einer Treibladung gefüllte Treibladungshülse mit einem Hülsenboden, der eine sich im Wesentlichen axial erstreckende Hülsenbodenöffnung mit T-förmiger Randkontur enthält. Die Hülsenbodenöffnung ist durch einen, ein Anzündhütchen aufnehmenden, T-förmig ausgebildeten Stopfen verschlossen, der in dieser Position durch einen Schmelzsicherungsring einer Berstsicherung in der Hülsenbodenöffnung gehalten wird.
Derartige Patronen sind beispielsweise aus dem Dokument DE 10 2011 014 402 A1 bekannt. Dieses Dokument formt den Ausgangspunkt für die Erfindung. Dabei handelt es sich vorzugsweise um Patronen, deren Geschosskaliber im mittleren Kaliberbereich, bevorzugt zwischen 35 mm und 40 mm, liegt.
Aus der DE 10 2004 020 838 B3 ist eine Patronenmunition bekannt, die Entlastungskanäle zwischen einer Treibkammer und dem Äußeren der Patronenhülse vorsieht, wobei die Entlastungskanäle mit einem schmelzbaren Material ausgefüllt sind. Das Schmelzmaterial hat einen niedrigeren Schmelzpunkt als die Zündtemperatur der Zündeinrichtung und der Treibladung. Steigt die Umgebungstemperatur der Patronenhülse über den Schmelzpunkt des Schmelzmaterials, schmilzt dieses und gibt die Entlastungskanäle frei, sodass beim späteren Zünden der Treibladung dieses ohne Druckaufbau abbrennt.
Die US 2012/0204750 A1 beschreibt ein Druckentlastungssystem für eine Patrone, die US 2003/0205161 A1 offenbart ein Verfahren und eine Vorrichtung zur lösbaren Befestigung einer Verschlussplatte an einem Gehäuse.
Um zu vermeiden, dass es bei einem Brand, etwa in einem Munitionsdepot, zu einer Explosion derartiger Patronen kommen kann, enthalten sie jeweils eine Berstsicherung. Diese besteht im Wesentlichen aus einer durch die Hülsenbodenöffnung gebildeten Druckentlastungsöffnung und dem als Schmelzsicherung wirkenden Schmelzsicherungsring. Dabei stützt sich der Schmelzsicherungsring mit seiner dem Hülsenboden zugewandten Rückseite an einem Vorsprung des Hülsenbodens ab und begrenzt mit seiner Vorderseite den Treibladungsraum. Der das Anzündhütchen enthaltende Stopfen ist von der Rückseite des Hülsenbodens in die Hülsenbodenöffnung eingeführt und wird innerhalb der Hülsenbodenöffnung durch den Schmelzsicherungsring gehalten. Hierzu weist das vordere Ende des Stopfen-halses eine Aufweitung auf, die den Schmelzsicherungsring treibladungsseitig hintergreift.The invention relates to a cartridge with a drive system and a projectile connected to the drive system. The propulsion system includes a propellant charge case filled with a propellant charge having a sleeve bottom containing a substantially axially extending sleeve bottom opening with a T-shaped edge contour. The sleeve bottom opening is closed by a T-shaped stopper which receives a primer cap and which is held in this position by a fuse ring of a bursting device in the case bottom opening.
Such cartridges are for example from the document DE 10 2011 014 402 A1 known. This document forms the starting point for the invention. These are preferably cartridges whose bullet caliber is in the middle caliber range, preferably between 35 mm and 40 mm.
From the DE 10 2004 020 838 B3 a cartridge ammunition is known which provides discharge channels between a drive chamber and the exterior of the cartridge case, wherein the discharge channels are filled with a fusible material. The melting material has a lower melting point than the ignition temperature of the ignition device and the propellant charge. If the ambient temperature of the cartridge shell rises above the melting point of the melt material, it melts and releases the discharge channels, so that the propellant charge burns off later without any pressure build-up.
The US 2012/0204750 A1 describes a pressure relief system for a cartridge, the US 2003/0205161 A1 discloses a method and apparatus for releasably securing a closure panel to a housing.
In order to avoid that in the case of a fire, for example in an ammunition depot, an explosion of such cartridges can occur, they each contain a bursting device. These consists essentially of a pressure relief opening formed by the sleeve bottom opening and the fuse ring acting as a fuse. In this case, the fuse ring is supported with its sleeve bottom facing the back of a projection of the case bottom and limited with its front the propellant charge space. The primer-containing plug is inserted from the back of the case bottom into the case bottom opening and is retained within the case bottom opening by the fuse ring. For this purpose, the front end of the plug neck has a widening, which engages behind the fuse ring on the drive charge side.

Der Schmelzsicherungsring besteht aus einem druckfesten Material, dessen Schmelzpunkt niedriger ist als die niedrigste Zündtemperatur der pyrotechnischen Zündladung des Anzündhütchens und Treibladungspulvers, sodass im Falle eines Brandes zunächst der Schmelzsicherungsring schmilzt, bevor das Anzündhütchen zünden kann und damit der Stopfen seinen Halt verliert und die Druckentlastungsöffnung freigibt.The fuse ring is made of a pressure-resistant material whose melting point is lower than the lowest ignition temperature of the primer's pyrotechnic primer and propellant charge powder so that in the event of fire, the fuse ring first melts before the primer cap can ignite and the plug disengages and releases the pressure relief port ,

Zur Montage der Patrone wird der Schmelzsicherungsring von der dem Geschoss der Patrone zugewandten Vorderseite der Treibladungshülse in deren Innenraum eingeführt. Dieses erschwert die Montage von Patronen, insbesondere mit langen Treibladungshülsen und kleinerem Kaliber. Die Treibladung wird zudem erst nach der Montage des Schmelzsicherungsringes in die Treibladungshülse eingefüllt und das Geschoss erst anschließend mit der Treibladungshülse verbunden.To install the cartridge, the fuse ring is inserted from the bullet of the cartridge facing the front of the propellant charge sleeve in the interior. This complicates the assembly of cartridges, especially with long propelling pods and smaller caliber. The propellant charge is also filled only after the assembly of the fuse ring in the propellant charge sleeve and the bullet only then connected to the propellant charge sleeve.

Aufgrund des direkten Kontaktes des Schmelzsicherungsringes mit der Treibladung kann beim Abschuss der entsprechenden Patrone, und den damit verbundenen hohen innenballistischen Belastungen, es zu Beschädigungen des Schmelzsicherungsringes und damit unter Umständen auch zu Gasdruckverlusten kommen.Due to the direct contact of the fuse ring with the propellant can cause the loss of the corresponding cartridge, and the associated high internal ballistic loads, it may damage the fuse ring and thus possibly also to gas pressure losses.

Der Erfindung liegt die Aufgabe zugrunde, eine Patrone der eingangs erwähnten Art anzugeben, die einfacher als vergleichbare bekannte Patronen montierbar ist, und bei der im Falle des Abschusses der Patrone eine Beschädigung des Schmelzsicherungsringes sicher vermieden wird. Außerdem soll ein Verfahren zur Montage der Patrone offenbart werden.The invention has for its object to provide a cartridge of the type mentioned above, which is easier than comparable known cartridges mountable, and in the case of the launch of the cartridge damage to the fuse ring is reliably avoided. In addition, a method for assembling the cartridge will be disclosed.

Diese Aufgabe wird erfindungsgemäß hinsichtlich des Verfahrens durch die Merkmale des Anspruchs 1 und hinsichtlich der Patrone durch die Merkmale des Anspruchs 3 gelöst. Weitere, besonders vorteilhafte Ausgestaltungen der Erfindung offenbaren die Unteransprüche.This object is achieved according to the invention by the features of the Claim 1 and with respect to the cartridge by the features of claim 3 solved. Further, particularly advantageous embodiments of the invention disclose the dependent claims.

Die Erfindung beruht im Wesentlichen auf dem Gedanken, den Schmelzsicherungsring nicht am treibladungsseitigen Ende des Stopfenhalses in der Treibladungshülse anzuordnen, sondern zwischen der Vorderseite des Kopfteiles des Stopfens und der Rückseite eines sich anschließenden innenseitigen Vorsprunges des Hülsenbodens, sodass der Treibladungsraum nicht durch den Schmelzsicherungsring, sondern nur durch die vordere Fläche des Stopfenhalses begrenzt wird. Außerdem weist der plastisch verformbare Schmelzsicherungsring einen Außendurchmesser auf, der derart gewählt ist, dass er zur Montage von der Außenseite des Hülsenbodens in die Hülsenbodenöffnung einsetzbar ist.The invention is based essentially on the idea of not arranging the fuse ring at the propellant charge end of the plug neck in the propellant charge case, but between the front of the plug header and the back of a subsequent inside protrusion of the case bottom, such that the propellant charge space is not penetrated by the fuse ring is limited only by the front surface of the stopper neck. In addition, the plastically deformable fuse ring has an outer diameter which is chosen such that it can be used for mounting from the outside of the sleeve bottom in the sleeve bottom opening.

In der montierten Position der Patrone ist der Schmelzsicherungsring durch die von dem Kopfteil des Stopfens auf ihn ausgeübte axiale Kraft derart plastisch verformt, dass sein innerer Rand form- und/oder kraftschlüssig in eine äußere nutenförmige Ausnehmung des Stopfens und sein äußerer Rand form- und/oder kraftschlüssig in eine innere nutenförmige Ausnehmung des Hülsenbodens eingreift.In the mounted position of the cartridge, the fuse ring is plastically deformed by the axial force exerted thereon by the head portion of the plug, such that its inner edge is positively and / or non-positively deformed into an outer groove-shaped recess of the plug and its outer edge. or engages positively in an inner groove-shaped recess of the sleeve bottom.

Die Montage des Schmelzsicherungsringes von der Rückseite des Hülsenbodens aus ermöglicht eine zuverlässige, schnelle Montage unabhängig von der Länge der Treibladungshülse und von dem Kaliber der Patrone. Die Montage erfolgt nunmehr nicht mehr von der Innenseite sondern von der Außenseite her. Zudem werden in nur einem Prozessschritt der Stopfen mit dem Ring in die Hülse eingedrückt, der Ring axial gestaucht, sodass er sich radial ausdehnt und in der Treibladungshülse und dem Stopfen verankert.Mounting the fusible link ring from the back of the case bottom allows for reliable, quick assembly regardless of the length of the cartridge and the caliber of the cartridge. The assembly is now no longer from the inside but from the outside. In addition, in only one process step, the plug with the ring is pressed into the sleeve, the ring axially compressed, so that it expands radially and anchored in the propellant charge sleeve and the stopper.

Dadurch, dass der Schmelzsicherungsring nicht mehr direkt von dem Gasdruck beaufschlagt wird, wird auch bei Munitionsarten, bei denen beim Abschuss sehr hohe innenballistische Belastungen auftreten, verhindert, dass der hohe, anhaltende Gasdruck den Schmelzsicherungsring beschädigt und Gasdruckverluste auftreten.The fact that the fuse ring is no longer acted upon directly by the gas pressure, even with types of ammunition, which occur at firing very high internal ballistic loads, prevents the high, sustained gas pressure damaged the fuse ring and gas pressure losses occur.

Durch das Einpressen des Schmelzsicherungsringes in die nutenförmigen Ausnehmungen des Stopfens und des Hülsenbodens werden Stopfen und Hülsenboden gegeneinander abgedichtet, sodass keine zusätzlichen Dichtungen erforderlich sind.By pressing the fuse ring in the groove-shaped recesses of the plug and the sleeve bottom plug and sleeve bottom are sealed against each other, so that no additional seals are required.

Außerdem ermöglicht das erfindungsgemäße Verfahren eine Befüllung der Treibladungshülse durch die Hülsenbodenöffnung. Damit ist man in der Lage die Patronen so weit vorzumontieren, dass lediglich noch eine Befüllung mit Treibladungspulver und ein Verschließen der Hülsenbodenöffnung erforderlich sind.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus dem folgenden, anhand von Figuren beschriebenen Ausführungsbeispiel. Es zeigen:

Fig.1
den Längsschnitt durch den heckseitigen Bereich des Antriebssystems einer erfindungsgemäßen Patrone nach dem Einsetzen eines Schmelzsicherungsringes und eines Stopfens in die Hülsenbodenöffnung der Treibladungshülse, bevor sich der Stopfen in seiner montierten Endposition befindet und
Fig.2
die Fig.1 entsprechende Ansicht, nachdem der Stopfen seine Endposition erreicht hat.
In den Fig.1 und 2 ist mit 1 das Antriebssystem einer erfindungsgemäßen Patrone (beispielsweise einer Übungspatrone mit dem Kaliber 40 mm) bezeichnet. Zwecks einer vollständigen insensitiven Munition (IM) wird auf die DE 10 2004 020 838 B3 oder DE 10 2011 014 402 A1 verwiesen. Das Antriebssystem 1 umfasst eine mit einer Treibladung 2 gefüllte Treibladungshülse 3 mit einem heckseitig angeordneten Hülsenboden 4. Der Hülsenboden 4 enthält eine Hülsenbodenöffnung 5 mit, in Richtung der Längsachse der Patrone gesehen, T-förmiger Randkontur (bevorzugt). Die Hülsenbodenöffnung 5 ist durch einen entsprechenden, hier T-förmig ausgebildeten Stopfen 6 mit Kopfteil 7 und Stopfenhals 8 verschlossen. In diesen Stopfen 6 ist ein Anzündhütchen 9 eingepresst.
Zwischen der Vorderseite 10 des Kopfteiles 7 des Stopfens 6 und der Rückseite 11 eines innenseitigen Vorsprunges 12 des Hülsenbodens 4 ist ein plastisch verformbarer Schmelzsicherungsring 13 (beispielsweise aus einer Legierung aus Wismut und Zinn) angeordnet, der einen Außendurchmesser aufweist, welcher derart gewählt ist, dass er von der Rückseite 14 des Hülsenbodens 4 in die Hülsenbodenöffnung 5 einsetzbar ist (Fig.1).In addition, the inventive method allows filling of the propellant charge sleeve through the sleeve bottom opening. This one is able to pre-assemble the cartridges so far that only a filling with propellant powder and closing the sleeve bottom opening are required.
Further details and advantages of the invention will become apparent from the following, described with reference to figures embodiment. Show it:
Fig.1
the longitudinal section through the rear-side portion of the drive system of a cartridge according to the invention after inserting a fuse ring and a plug into the sleeve bottom opening of the propellant charge sleeve, before the plug is in its mounted end position and
Fig.2
the Fig.1 corresponding view after the plug has reached its end position.
In the Fig.1 and 2 1 denotes the drive system of a cartridge according to the invention (for example, a 40 mm caliber exercise cartridge). For the purpose of a complete insensitive ammunition (IM) is on the DE 10 2004 020 838 B3 or DE 10 2011 014 402 A1 directed. The drive system 1 comprises a filled with a propellant charge 2 propellant charge case 3 with a rear side arranged sleeve bottom 4. The sleeve bottom 4 includes a sleeve bottom opening 5 with, viewed in the direction of the longitudinal axis of the cartridge, T-shaped edge contour (preferred). The sleeve bottom opening 5 is closed by a corresponding, here T-shaped stopper 6 with head part 7 and stopper neck 8. In this plug 6 a primer 9 is pressed.
Between the front 10 of the head portion 7 of the plug 6 and the back 11 of an inside projection 12 of the sleeve bottom 4, a plastically deformable fuse ring 13 (for example, made of an alloy of bismuth and tin) is arranged, which has an outer diameter which is selected such that it can be inserted from the rear side 14 of the sleeve bottom 4 into the sleeve bottom opening 5 ( Fig.1 ).

Wird nun, ausgehend von der in Fig.1 dargestellten Position des Stopfens 6, das Kopfteil 7 in Richtung des Schmelzsicherungsringes 13 von einer axialen Kraft beaufschlagt, so stützen sich die Vorderseite 17 des Schmelzsicherungsringes 13 an der Rückseite 11 des innenseitigen Vorsprunges 12 und die Rückseite 18 des Schmelzsicherungsringes 13 an der Vorderseite 10 des Kopfteiles 7 des Stopfens 6 ab, sodass der Schmelzsicherungsring 13 zusammengedrückt und plastisch verformt wird. Dadurch fließt das Material des Schmelzsicherungsringes 13 radial in eine nutenförmige Ausnehmung 15 des Stopfens 6 und in eine nutenförmige Ausnehmung 16 des Hülsenbodens 4 (Fig.2). Der innere Rand 19 des Schmelzsicherungsringes 13 greift daher nun form- und kraftschlüssig in die äußere nutenförmige Ausnehmung 15 des Stopfens (6), und der äußere Rand 20 des Schmelzsicherungsringes greift form- und kraftschlüssig in die innere nutenförmige Ausnehmung 16 des Hülsenbodens 4 ein.
Dadurch wird der Stopfen 6 innerhalb der Hülsenbodenöffnung 5 fixiert, ohne dass es zu einer nennenswerten Beaufschlagung des Schmelzsicherungsringes 13 durch die Treibladungsgase im Falle einer späteren Schussabgabe kommt.
Sofern hingegen die Patrone einem nicht beabsichtigten Brand etwa in einem Munitionsdepot ausgesetzt sein sollte, schmilzt der Schmelzsicherungsring 13 bevor es zur Zündung des Anzündhütchens 9 oder des Treibladungspulvers kommt und der Stopfen 6 wird freigegeben, sodass er nach der Zündung der Treibladung 2 durch die sich bildenden Treibladungsgase ohne nennenswerte Geschwindigkeit aus der Hüisenbodenöffnung 5 herausgedrückt wird.
Die Montage des Antriebsystems 1 wird ihrerseits vereinfacht. Das Anzündhüttchen 9 wird in den Stopfen 6 eingesetzt. In die Treibladungshülse 3 wird der Schmelzsicherungsring 13 eingesetzt. Dann wird die Einheit Stopfen 6 und Anzündhütchen 9 mit axialer Kraft in die Treibladungshülse 3 eingepresst. Dadurch wird, wie bereits erwähnt, der Schmelzsicherungsring 13 in der Höhe zusammengedrückt, sodass der Werkstoff plastisch verformt und radial in die nutenförmigen Ausnehmungen 15 an der Treibladungshülse 3 und Stopfen 6 fließt. Durch dieses Verpressen ist auch eine Abdichtung gegen äußere Umwelteinflüsse gegeben. Die Verformung des Schmelzsicherungsringes 13 erzeugt eine sichere Haltekraft gegen die beim Transport, Vibration und Beschuss auftretenden Kräfte.Now, starting from the in Fig.1 illustrated position of the plug 6, the head portion 7 is acted upon in the direction of the fuse ring 13 by an axial force, the front 17 of the fuse ring 13 on the back 11 of the inside projection 12 and the back 18 of the fuse ring 13 on the front 10 of the head part 7 of the plug 6, so that the fuse ring 13 is compressed and plastically deformed. As a result, the material of the fuse ring 13 flows radially into a groove-shaped recess 15 of the plug 6 and into a groove-shaped recess 16 of the sleeve bottom 4 (FIG. Fig.2 ). Therefore, the inner edge 19 of the fuse ring 13 now engages positively and non-positively in the outer groove-shaped recess 15 of the plug (6), and the outer edge 20 of the fuse ring engages positively and non-positively in the inner groove-shaped recess 16 of the sleeve bottom 4.
As a result, the plug 6 is fixed within the sleeve bottom opening 5, without there being any appreciable loading of the fuse ring 13 by the propellant charge gases in the event of a later firing.
If, on the other hand, the cartridge should be exposed to an unintentional fire, for example in an ammunition depot, the fuse ring 13 melts before it ignites the primer cap 9 or the propellant charge powder and the plug 6 is released so that it ignites after the ignition of the propellant charge 2 Propellant gases is pushed out of the Hüisenbodenöffnung 5 without significant speed.
The assembly of the drive system 1 is in turn simplified. The primer 9 is inserted into the plug 6. In the propellant charge case 3, the fuse ring 13 is used. Then the unit plug 6 and primer 9 is pressed with axial force in the propellant charge case 3. Thereby, as already mentioned, the fuse ring 13 is compressed in height, so that the material plastically deformed and flows radially into the groove-shaped recesses 15 on the propellant charge case 3 and plug 6. By this compression is also given a seal against external environmental influences. The deformation of the fuse ring 13 generates a secure holding force against the forces occurring during transport, vibration and bombardment.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Antriebssystemdrive system
22
Treibladungpropellant
33
TreibladungshülseCartridge case
44
Hülsenbodensleeve base
55
HülsenbodenöffnungSleeve bottom opening
66
StopfenPlug
77
Kopfteilheadboard
88th
Stopfenhalsneck plug
99
AnzündhütchenPrimer
1010
Vorderseite (Kopfteil)Front (headboard)
1111
Rückseite (Vorsprung)Back side (projection)
1212
Vorsprunghead Start
1313
SchmelzsicherungsringFuse ring
1414
Rückseite (Hülsenboden)Back (sleeve bottom)
1515
Ausnehmung (Stopfen)Recess (plug)
1616
Ausnehmung (Hülsenboden))Recess (case bottom))
1717
Vorderseite (Schmelzsicherungsring)Front side (fuse ring)
1818
Rückseite (Schmelzsicherungsring)Rear side (fuse ring)
1919
innerer Rand (Schmelzsicherungsring)inner edge (fuse ring)
2020
äußerer Rand (Schmelzsicherungsring)outer edge (fuse ring)

Claims (7)

  1. Method for assembling a cartridge with a propulsion system (1) and a projectile connected to the propulsion system (1), wherein the propulsion system (1) comprises a propellant casing (3) which is filled with a propellant charge (2) and has a casing bottom (4) which includes a substantially axially extending casing bottom opening (5), and wherein the casing bottom opening (5) is closed by a plug (6) which receives a primer cap (9) and is kept in this position by a safety fuse ring (13) of a rupture disc, wherein the plug (6) comprises a plug neck (8) and a head part (7), and wherein the plug neck (8) has an outer groove-shaped recess (15), which is arranged on the outer side of the plug neck (8), and wherein an inner groove-shaped recess (16) is arranged on the inside of the casing bottom opening (5), with the features:
    a. the safety fuse ring (13) is inserted into the casing bottom opening (5) from the rear side (14) of the casing bottom (4) of the propellant casing (3) until it is supported by its front side (17) on the internal projection (12) of the casing bottom (4),
    b. then the plug (6) is inserted into the casing bottom opening (5) and an axial force is exerted on the rear side (18) of the safety fuse ring (13) by means of the head part (7), so that the safety fuse ring (13) is compressed and plastically deformed and its material flows radially into the groove-shaped recesses (15, 16) of the plug (6) and of the casing bottom (4), as a result of which no additional seals are necessary.
  2. Method according to Claim 1, characterized in that the primer cap (9) is connected to the plug (6) before the plug (6) is inserted into the casing bottom opening (5) of the propellant casing (3).
  3. Method according to Claim 1 or 2, characterized in that a filling of the propellant casing (3) is performed through the casing bottom opening (5).
  4. Cartridge, assembled by the method according to one of Claims 1 to 3, with a propulsion system (1) and a projectile connected to the propulsion system (1), wherein the propulsion system (1) comprises a propellant casing (3) which is filled with a propellant charge (2) and has a casing bottom (4) which includes a substantially axially extending casing bottom opening (5), and wherein the casing bottom opening (5) is closed by a plug (6) which receives a primer cap (9) and is kept in this position by a safety fuse ring (13) of a rupture disc, wherein the plug (6) comprises a plug neck (8) and a head part (7), and wherein the plug neck (8) has an outer groove-shaped recess (15), which is arranged on the outer side of the plug neck (8), characterized in that an inner groove-shaped recess (16) is arranged on the inside of the casing bottom opening (5), and in that the safety fuse ring (13) is supported by its front side (17) on the rear side (11) of an internal projection (12) of the casing bottom (4) and is supported by its rear side (18) on the front side (10) of the head part (7) of the plug (6), wherein its inner edge (19) engages in an interlocking and/or frictional manner in the outer groove-shaped recess (15) of the plug (6) and its outer edge (20) engages in an interlocking and/or frictional manner in the inner groove-shaped recess (16) of the casing bottom (4), so that when the cartridge is fired the safety fuse is not directly subjected to the gas pressure and no additional seals are required.
  5. Cartridge according to Claim 4, characterized in that the safety fuse ring (13) has an outside diameter which is chosen such that it is insertable into the casing bottom opening (5) from the rear side (14) of the casing bottom (4) for assembling the cartridge.
  6. Cartridge according to Claim 4 or 5, characterized in that the plug (6) is of a T-shaped form.
  7. Cartridge according to one of Claims 4 to 6, characterized in that the plastically deformable material of the safety fuse is an alloy of bismuth and tin.
EP15717885.6A 2014-04-28 2015-04-21 Cartridge with safety fuse in the drive system, and method for producing it Active EP3137845B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL15717885T PL3137845T3 (en) 2014-04-28 2015-04-21 Cartridge with safety fuse in the drive system, and method for producing it
SI201530375T SI3137845T1 (en) 2014-04-28 2015-04-21 Cartridge with safety fuse in the drive system, and method for producing it

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201410005997 DE102014005997B3 (en) 2014-04-28 2014-04-28 Cartridge and method for its production
PCT/EP2015/058616 WO2015165780A1 (en) 2014-04-28 2015-04-21 Cartridge with safety fuse in the drive system, and method for producing it

Publications (2)

Publication Number Publication Date
EP3137845A1 EP3137845A1 (en) 2017-03-08
EP3137845B1 true EP3137845B1 (en) 2018-06-06

Family

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Application Number Title Priority Date Filing Date
EP15717885.6A Active EP3137845B1 (en) 2014-04-28 2015-04-21 Cartridge with safety fuse in the drive system, and method for producing it

Country Status (11)

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US (1) US9995563B2 (en)
EP (1) EP3137845B1 (en)
DE (1) DE102014005997B3 (en)
DK (1) DK3137845T3 (en)
ES (1) ES2682968T3 (en)
HU (1) HUE039542T2 (en)
LT (1) LT3137845T (en)
PL (1) PL3137845T3 (en)
PT (1) PT3137845T (en)
SI (1) SI3137845T1 (en)
WO (1) WO2015165780A1 (en)

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US20180135953A1 (en) * 2016-11-15 2018-05-17 Nostromo Holdings, Llc Ammunition cartridge with a base plug vent
IL260886B (en) * 2018-07-30 2021-04-29 Rafael Advanced Defense Systems Ltd Rocket armament launchable from a tubular launcher with an outside launcher non-ignition securing and motor separation during flight

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Also Published As

Publication number Publication date
US20170299361A1 (en) 2017-10-19
US9995563B2 (en) 2018-06-12
ES2682968T3 (en) 2018-09-24
WO2015165780A1 (en) 2015-11-05
HUE039542T2 (en) 2019-01-28
PL3137845T3 (en) 2018-10-31
EP3137845A1 (en) 2017-03-08
PT3137845T (en) 2018-10-08
DE102014005997B3 (en) 2015-03-26
LT3137845T (en) 2018-09-10
SI3137845T1 (en) 2018-10-30
DK3137845T3 (en) 2018-09-03

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