EP2846124A1 - Obus - Google Patents

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Publication number
EP2846124A1
EP2846124A1 EP14002970.3A EP14002970A EP2846124A1 EP 2846124 A1 EP2846124 A1 EP 2846124A1 EP 14002970 A EP14002970 A EP 14002970A EP 2846124 A1 EP2846124 A1 EP 2846124A1
Authority
EP
European Patent Office
Prior art keywords
projectile
ring
nose
casing
stop
Prior art date
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.)
Granted
Application number
EP14002970.3A
Other languages
German (de)
English (en)
Other versions
EP2846124B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Diehl Defence GmbH and Co KG
Original Assignee
Diehl BGT Defence GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51421806&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2846124(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Diehl BGT Defence GmbH and Co KG filed Critical Diehl BGT Defence GmbH and Co KG
Publication of EP2846124A1 publication Critical patent/EP2846124A1/fr
Application granted granted Critical
Publication of EP2846124B1 publication Critical patent/EP2846124B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a projectile, comprising a projectile casing with explosives received therein into which a projectile tip containing an igniter is inserted.
  • a projectile of the type in question consists of a projectile casing in which the actual explosive is added.
  • the projectile nose containing the igniter is usually screwed in with high torque. If such a projectile is exposed to high temperatures, for example in case of fire, then the explosive begins to outgas due to the increased temperature inside the projectile. It thus forms a high internal pressure, which, since the projectile nose is firmly screwed into the projectile casing and thus given a tight connection, can not be degraded by the escape of the forming gas. The explosive is therefore very heavily dammed up. At a critical temperature, the reaction temperature of the explosive, the explosive is reversed, resulting in an explosion.
  • the predetermined breaking points on the component break as soon as a defined minimum internal pressure is reached, so that the pressure can escape in the direction of the venting channels closed via the plastic plugs.
  • the plastic stoppers which are only slightly held, are pushed outwards by the high pressure, so that the venting channels are opened and the pressure can be reduced.
  • items, namely the Kunststoffpfropfen ago on the other hand, it is not excluded that at very high internal pressure of the igniter respectively the bullet tip but not from the projectile casing dissolves, especially if for whatever reason, the predetermined breaking point does not open or not completely ,
  • the invention is therefore based on the problem to provide a projectile, on the one hand, the possibility of venting and thus the pressure reduction, on the other hand, however, prevents separation of the projectile nose from the projectile casing.
  • the projectile nose is axially movable by a build-up inside the projectile gas pressure relative to the projectile casing against a stop under opening at least one of the interior of the projectile casing with the surrounding venting channel.
  • the projectile according to the invention which may be of any type of projectile and also of a warhead, is characterized by the fact that a pressure-related defined axial relative mobility of projectile nose is provided to the projectile casing.
  • this relative mobility leads to the defined opening of at least one ventilation channel, via which the high internal pressure can be reduced.
  • this movement is defined stop-limited, ie, the projectile nose is only a defined axial piece movable and then runs against a stop. Since it already closed due to the opening of the venting channel As the pressure drops, the projectile tip is securely held back over the stop, so it can not separate from the projectile casing.
  • the projectile according to the invention is therefore characterized by the integration of an additional mechanical coupling, which makes it possible to combine the vent as well as the retention of the projectile nose respectively the detonator on the projectile casing together. A separation or seizure of any items is therefore excluded in the projectile according to the invention.
  • the projectile nose has an external thread on which a female thread exhibiting a first ring is screwed, which has an external thread which is screwed into an internal thread of the projectile casing, and that at the projectile nose a stop element is provided, which runs to limit the axial movement, which is made possible by a pressure-induced shearing of the threaded connection of the ring with the projectile nose, against the stop.
  • the axial mobility is realized in accordance with this embodiment of the invention in that with the external thread of the projectile nose and screwed thereon internal thread of the ring, a threaded connection is designed which is designed so that it generates a defined axially directed force, which is generated by the high internal pressure , shears, so therefore the threaded connection is destroyed. Because of this then no longer given axial fixation of the projectile nose on the ring, which in turn is bolted to the bullet sleeve, the projectile nose can move a short distance axially pressure driven until the stop element of the projectile nose runs against the stop. Consequently, this thread connection constitutes a kind of "predetermined breaking point" of the system.
  • the intermeshing threads may be made relatively flat, ie. h. that both have a small thread depth and consequently only slightly mesh. It is also conceivable to weaken the respective threads by axial cutouts, so that the engagement surface is reduced overall and the like.
  • the aim of the design of the threaded connection is that a relatively low pressure on the bullet tip or the igniter is sufficient to shear the thread flanks.
  • a stop element is provided on the nose tip side, which runs against a stop that is fixed in position with the projectile casing.
  • This stop element may be embodied in a further development of the invention as a second ring, which is screwed with an internal thread on the external thread of the projectile nose.
  • the first ring which receives the defined, can be sheared threaded connection with the projectile nose, on the other hand, a second ring, which constitutes the stop element.
  • the threaded connection which enters the internal thread of the second ring with the external thread of the projectile nose, is designed mechanically much stronger than the peelable threaded connection.
  • this second threaded connection should never be damaged due to pressure, but it should be so stable that the projectile nose, when it runs against the stop, is securely fixed. For this reason, it must never come at a time to solve or damage this threaded connection. It is conceivable to cut deeper the external thread of the projectile nose in this area, so that the correspondingly cut internal thread engages deeper and consequently the thread flanks lie over a larger area. If the external thread of the projectile nose is consistently the same, and if it is locally removed, for example by longitudinal milling in the threaded connection to the first ring, then it can be continuous in the region of the connection to the second ring, so that a comparatively larger threaded engagement surface is provided.
  • one or more, preferably equidistantly distributed around the circumference of the ring arranged radial projections are provided on the second ring, with which or which the second ring runs against the stop.
  • the second ring thus has one or more radial projections, which serve as quasi as abutment sections and strike in the defined end position to the stop.
  • the stop itself is preferably formed by the front edge of the first ring, d. e., that the first ring, which is bolted to the housing shell, which is a Wegbegrenzende element while, if provided, the second ring is the second wegbegrenzende element.
  • the first ring has a first ring section having the internal thread and an adjoining second annular section with an enlarged inner diameter, with which the first ring radially overlaps the second ring in sections.
  • the second ring is screwed somewhat below the first ring, so that sufficiently long thread engagements result, but at the same time a compact construction is also provided.
  • At least one venting channel is opened by moving respectively at the latest when reaching the end position of the projectile nose after shearing off the threaded connection. Since, as described, the projectile tip moves axially away from the projectile shell, a radially outwardly open annular channel is thus opened in this case, which makes it possible to reduce the overpressure.
  • the outer thread of the projectile nose and / or the inner thread of the first ring is expediently provided with at least one longitudinal groove which forms the venting channel or a part thereof and which opens in an annular gap which opens outwardly when the stopper position between projectile nose and projectile casing is reached ,
  • the threaded connection which is sheared off at overpressure, is thus provided with a, preferably with a plurality of equidistant and distributed around the circumference arranged longitudinal grooves which form the respective ventilation ducts or parts thereof. These also serve at the same time the weakening of the thread to allow a defined shearing.
  • the first ring engages over the second ring with a radial distance, so that an annular gap is formed, which circumferentially distributed with the at least one longitudinal groove respectively the plurality of provided longitudinal grooves and the projectile interior communicates.
  • Fig. 1 shows in the form of a pure schematic representation of a projectile according to the invention 1, consisting of a projectile casing 2, in which the actual explosive 3 is added, and one attached to the projectile casing 2 via a screw projectile nose 4, which has an igniter 5, the defined ignition of Explosives 3 serves.
  • a bullet which is an ammunition, for example, the caliber 76 mm x 636, but also to a warhead or the like, is well known.
  • the projectile 1 according to the invention is characterized in that the projectile nose 4 is defined relative to the projectile casing 2 and limited axially movable, wherein the axial movement is initiated solely by an overpressure caused in the interior of the projectile by outgassing of the explosive 3, and means are provided in order to reduce the overpressure as a result of the axial movement.
  • the projectile tip 4 is in a sectional view in Fig. 2 shown. It comprises on the one hand a housing 6, which can also be addressed as an igniter housing.
  • a Zündverproofrany 7 is screwed tight, including the housing 6 has an internal thread 8 and the ZündverEntrany 7 on a pin 9 has an external thread 10.
  • the projectile tip is thus formed by the housing 6, the ignition amplifier carrier 7 and the igniter unit 11.
  • the Zündverwoodrany 7 and thus the projectile nose 4 has an external thread 12, which is interrupted over a plurality of circumferentially equidistantly distributed longitudinal grooves 13, the venting channels respectively parts of venting channels, and this is ultimately weakened defined.
  • the longitudinal grooves 13 go in continuing Grooves 14, so that ultimately this section has a plurality of individual ventilation channels 15.
  • the front view according to Fig. 4 clearly shows the individual adjacent venting channels 15.
  • Fig. 6 shows a perspective view of the projectile nose 4, on which the ZündverSchlochrrien 7 is mounted together with ignition unit 11.
  • On the first external thread 12 is (see Fig. 7 ) now a first ring 17, the, see Fig. 8 , having an internal thread 18, screwed. It is screwed on until it rests against a radial flange 31 of the ZündverEntrities 7. Due to the formation of the longitudinal grooves 13 in conjunction with the fact that the external thread 12 is axially seen relatively short and results from screwing of internal thread 18 and external thread 12, a relatively weak threaded connection that holds no too large axial forces.
  • the projectile nose 4 is axially fixed relative to the projectile casing 2, on the other hand, however, this threaded connection can be solved due to pressure to move the projectile tip 4 of the threaded sleeve 2 for venting purposes. This will be discussed below.
  • the first ring 18 has an enlarged diameter portion 19.
  • This section 19 makes it possible to see a second ring 20, which Fig. 10 , an internal thread 21, to screw on the second external thread 16 and at the same time to guide under the first ring 17, see Fig. 9 , D. h., That the first ring 17 axially overlaps the second ring 20 slightly, in which case an annular gap 22 is formed.
  • the external thread 16 and the internal thread 21 are a substantially stronger mechanical connection, as the external thread 12 and the internal thread 18. For it is to ensure that the second ring 20 and the ZündverStorerany 7 are fixed and undetachably connected to each other under pressure.
  • a plurality of radial projections 23 are provided, which form the second ring 20 as a stop element. Because these radial projections 23 beat when the projectile nose 4 is moved axially due to pressure, against a stop 24, formed over the end edge 25 of the first ring 17, and thus limit the axial movement, which will be discussed below. Since the radial projections 23 are circumferentially spaced from each other and thus given a radially lower intermediate region 26 between each two radial projections 23, there is consequently, see Fig. 9 , an immediate access to the annular gap 22 and via this to the venting channels 15th
  • the projectile tip 4 can be screwed into the projectile casing 2.
  • the projectile casing 2 has an internal thread 27 into which an external thread 28 provided on the first ring 17 is screwed.
  • This threaded connection is also designed to be very strong mechanically, so that it is ensured that it is axially stable when pressure is applied to the projectile nose 4 and is not deformed.
  • Fig. 12 shows the annular gap 22 between the first ring 17 and second ring 20, as well as the axial gap 29 between the end edge 25 of the first ring and the leading edge of the radial projections 23 of the second ring 20th
  • Fig. 12 shows the mounting position, in which consequently a firm and tight connection between the projectile nose 4 and projectile casing 2 is given. Obviously, the leading end edge 30 of the projectile casing 2 is fixed and tight against the opposite end face 32 of the housing 6 and the radial flange 31 of the ZündverEntrlys 7.
  • annular gap 33 opens radially outwardly.
  • annular gap 33 all the longitudinal grooves 13 respectively venting passages 15. Since on the one hand the radial projections 23 are circumferentially spaced and open intermediate portions 26 are given, and on the other hand, there is also an annular gap 22 between the two rings 17 and 20 which leads into the venting channels 15, thus a complete venting path is given, from the interior of the projectile casing 2 in the annular gap 33 and from there leads to the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP14002970.3A 2013-09-05 2014-08-27 Obus Active EP2846124B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310014811 DE102013014811B4 (de) 2013-09-05 2013-09-05 Geschoss

Publications (2)

Publication Number Publication Date
EP2846124A1 true EP2846124A1 (fr) 2015-03-11
EP2846124B1 EP2846124B1 (fr) 2018-06-06

Family

ID=51421806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14002970.3A Active EP2846124B1 (fr) 2013-09-05 2014-08-27 Obus

Country Status (3)

Country Link
EP (1) EP2846124B1 (fr)
DE (1) DE102013014811B4 (fr)
ZA (1) ZA201406456B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016008391B4 (de) 2016-07-09 2018-05-24 Diehl Defence Gmbh & Co. Kg Geschoss

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7353755B2 (en) 2003-12-22 2008-04-08 Giat Industries Deconfinement device for the casing of a piece of ammunition
EP2053344A1 (fr) * 2007-10-23 2009-04-29 Tda Armements S.A.S. Chargement énergétique à déconfinement contrôlé et munition équipée d'un tel chargement
US20100024675A1 (en) * 2006-09-29 2010-02-04 Nexter Munitions Deconfinement device for the casing of a piece of an ammunition
FR2981443A1 (fr) * 2011-10-17 2013-04-19 Sme Generateur de gaz muni d'un organe de securite pour les cas d'echauffements lents

Family Cites Families (21)

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DE353115C (de) 1922-05-08 Otto Wilhelmi Mit Fluessigkeit gefuelltes Sprenggeschoss
NL4380C (fr) 1913-11-19
US1292505A (en) 1917-03-03 1919-01-28 Westinghouse Air Brake Co Percussion-fuse for projectiles.
DE350905C (de) 1920-05-20 1922-03-28 Carl Puff Aufschlagzuender fuer Abwurfgeschosse
FR693280A (fr) 1930-05-16 1930-11-18 Projectiles à multiples usages
US2402716A (en) 1940-10-18 1946-06-25 Cameron A Whitsett Antiaircraft shell
NL107545C (fr) 1960-04-02
AT228098B (de) 1960-05-18 1963-06-25 Oerlikon Buehrle Ag Aufschlagzünder für Geschosse
CH454675A (de) 1966-03-11 1968-04-15 Oerlikon Buehrle Holding Ag Elektrischer Aufschlag-Kopfschalter für Geschosse
CH591067A5 (fr) 1975-04-03 1977-08-31 Oerlikon Buehrle Ag
DE3373938D1 (en) 1982-03-04 1987-11-05 Royal Ordnance Plc Improvements in or relating to safety devices for carrier shells
US5035181A (en) * 1985-01-22 1991-07-30 The United States Of America As Represented By The Secretary Of The Navy Thermosensitive pop-out device
FR2628833B1 (fr) 1988-03-18 1993-06-25 Pont Sur Sambre Ateliers Mecan Dispositif assurant le deconfinement d'une charge militaire contenant un explosif
US4991513A (en) 1990-03-12 1991-02-12 The United States Of America As Represented By The Secretary Of The Navy Carrier projectile with safety vents
US5119715A (en) 1991-07-02 1992-06-09 Raytheon Company Time delay fuze
FR2742221B1 (fr) 1995-12-12 1998-02-27 Soc D Ateliers Mecaniques De P Dispositif de deconfinement pour munition
DE29817728U1 (de) 1998-10-05 1999-02-04 Honeywell Ag, 63067 Offenbach Geschoßzünderaufbau
US6523477B1 (en) 1999-03-30 2003-02-25 Lockheed Martin Corporation Enhanced performance insensitive penetrator warhead
US7472653B1 (en) 2006-06-15 2009-01-06 United States Of America As Represented By The Secretary Of The Navy Insensitive munitions warhead explosive venting system
US9964387B2 (en) 2009-08-19 2018-05-08 Orbital Atk, Inc. Insensitive munitions swaged vent plug
US8505458B1 (en) * 2012-01-27 2013-08-13 The United States Of America As Represented By The Secretary Of The Navy Venting cap system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7353755B2 (en) 2003-12-22 2008-04-08 Giat Industries Deconfinement device for the casing of a piece of ammunition
US20100024675A1 (en) * 2006-09-29 2010-02-04 Nexter Munitions Deconfinement device for the casing of a piece of an ammunition
EP2053344A1 (fr) * 2007-10-23 2009-04-29 Tda Armements S.A.S. Chargement énergétique à déconfinement contrôlé et munition équipée d'un tel chargement
FR2981443A1 (fr) * 2011-10-17 2013-04-19 Sme Generateur de gaz muni d'un organe de securite pour les cas d'echauffements lents

Also Published As

Publication number Publication date
DE102013014811B4 (de) 2015-04-09
ZA201406456B (en) 2016-05-25
DE102013014811A1 (de) 2015-03-05
EP2846124B1 (fr) 2018-06-06

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