EP0977005A1 - Dispositif d'amorçage pour obus explosif - Google Patents
Dispositif d'amorçage pour obus explosif Download PDFInfo
- Publication number
- EP0977005A1 EP0977005A1 EP99113226A EP99113226A EP0977005A1 EP 0977005 A1 EP0977005 A1 EP 0977005A1 EP 99113226 A EP99113226 A EP 99113226A EP 99113226 A EP99113226 A EP 99113226A EP 0977005 A1 EP0977005 A1 EP 0977005A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- shell
- relay
- detonation
- rocket
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
- F42B12/201—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type characterised by target class
- F42B12/204—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type characterised by target class for attacking structures, e.g. specific buildings or fortifications, ships or vehicles
-
- 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
- F42C19/0838—Primers or igniters for the initiation or the explosive charge in a warhead
Definitions
- the technical field of the invention is that of initiating devices for explosive shells.
- An explosive shell is generally made up of a metal casing containing an explosive charge by example of TNT (trinitrotoluene or tolite).
- TNT trinitrotoluene or tolite
- a known initiating device is shown in the figure 1.
- the rocket includes a rocket 1 which is screwed to the casing 2 a shell 3 via a connection cup 7.
- the rocket includes a detonation relay 4 (for example a hexogen / wax composition) which is intended to initiate a priming relay load 5, interposed between relay 4 and an explosive charge 6 filling the envelope with the shell.
- the priming relay load is also made up by an explosive.
- the priming relay load is placed in well 7 metallic which carries a thread 7a allowing its fixing by screwing on the shell 2 of the shell.
- Bucket 7 carries also a thread 7b intended to receive the rocket 1.
- connection cup 7 is permanently fixed to the shell body during the storage phases.
- connection cup is also expensive because long and thin-walled. This results in a increased cost of the shell.
- Patent US4735145 taken as the basis of the preamble of the first claim, describes a detonator consisting of a first donor explosive charge initiated by a source of heat which projects a plate onto a lid which initiates a second charge by anvil effect.
- the priming device according to the invention allows reduce the cost of the shell while increasing the mass of the explosive charge.
- the subject of the invention is a priming device for an explosive shell having an explosive charge disposed in an envelope and including a rocket initiating a relay detonation device with an interposed plate between the explosive charge and the detonation relay, plate intended to be projected during the initiation of the relay on the explosive charge in order to cause the detonation thereof, device characterized in that the plate is integral with a support ring carrying a thread allowing its connection to the shell of the shell and a thread allowing the fixing of the rocket.
- the plate may include at least one circular groove ensuring a reduction in its thickness.
- the plate may include at least two concentric circular grooves.
- the plate will preferably be made of a material metallic with a density greater than or equal to 7.8, for example in steel.
- a priming device comprises a connecting ring 10 which has a thread 10a allowing its fixing by screwing on the shell 2 of the shell and a tapping 10b intended for receive the rocket 1.
- the connecting ring has a bottom constituting a plate 11 which is interposed between the explosive charge 6 and detonation relay 4.
- This plate 11 carries two circular grooves concentric 12a, 12b (see Figure 3) which provide a decrease in thickness.
- the plate (like the ring 10 which forms a single part with it) is made of steel. Its thickness is About 1 mm. The mass of the plate must be sufficient to that its kinetic energy ensures the initiation of loading explosive. Any other material with a density higher than that steel (7.8) may be suitable.
- the dimensions of the ring 10 are chosen so that that there remains between the relay 4 and the plate 11 a clearance between 1 and 3 mm.
- the plate will also be found after mounting at a distance from the upper surface 13 of the explosive charge on the order of 5 to 15 mm.
- the rocket 1 provokes at an instant determined on the trajectory of the shell (chronometric rocket or near) or on impact on a target (rocket impactful), the initiation of detonation relay 4 by a primer (not shown).
- the detonation wave generated by relay 4 causes the projection of the plate 11 on the surface 13 of the load explosive 6.
- the two grooves 12a, 12b by locating precisely rupture zones of the plate 11, allow the device to work perfectly, even with variations in radial and longitudinal positions of the priming of the rocket (internal primer to the rocket initiating relay 4 and not shown here) relative to the shell axis respectively and to the upper surface 13 of the explosive charge.
- a partial detonation of relay 4 will cause the projection of the central part of the delimited plate 11 only through the internal groove 12b.
- the energy delivered by a conventional relay 4 comprising for example 23 g of a composition of the graphite Hexocire type enough to cut the plate 11 at the primers of breaks 12a, 12b and to project it on load 6 with enough energy to initiate this one.
- the device according to the invention has numerous benefits.
- a reduction in the manufacturing cost is achieved by elimination of machining of the upper side of the load explosive. The latter can thus be left untreated.
- the reinforcing relay is removed which reduces also the cost of the shell.
- connection ring 10 is simpler to produce and less expensive than bucket 7 according to the prior art.
- the tightness of the shell is improved, so its resistance to storage.
- the stored shell (without the rocket) is perfectly closed by plate 11 which is of a single part with the ring 10 which is otherwise connected so waterproof (by a gasket 14 arranged between the end of the envelope and the ring 10) to the envelope.
- the known shells were to receive additional protection to isolate the booster 5 from humidity.
- the positioning tolerances of the plate 11 by relative to the upper surface 13 of the explosive charge 6 and compared to relay 4 are wide (of the order of 10mm) which also reduces manufacturing costs and contributes the reliability of priming.
- the presence of the two gorges 12a, 12b overcomes the dispersions relating to detonic characteristics of rocket relays of trade.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Air Bags (AREA)
- Crushing And Pulverization Processes (AREA)
- Toys (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
- la figure 1 représente en coupe longitudinale la partie avant d'un obus portant un dispositif d'amorçage selon l'art antérieur,
- la figure 2 représente en coupe longitudinale la partie avant d'un obus portant un dispositif d'amorçage selon l'invention,
- la figure 3 est une vue de la bague de liaison seule suivant la direction repérée F à la figure 2.
Claims (4)
- Dispositif d'amorçage pour un obus explosif ayant un chargement explosif disposé dans une enveloppe et comprenant une fusée (1) initiant un relais de détonation (4), dispositif comportant une plaque (11) interposée entre le chargement explosif (6) et le relais de détonation (4), plaque destinée à être projetée lors de l'initiation du relais (4) sur le chargement explosif (6) afin de provoquer la détonation de celui-ci, dispositif caractérisé en ce que la plaque (11) est solidaire d'une bague support (10) portant un filetage permettant sa liaison à l'enveloppe (2) de l'obus et un taraudage autorisant la fixation de la fusée (1).
- Dispositif d'amorçage selon la revendication 1, caractérisé en ce que la plaque (11) comporte au moins une gorge circulaire (12) assurant une diminution de son épaisseur.
- Dispositif d'amorçage selon la revendication 2, caractérisé en ce que la plaque (11) comporte au moins deux gorges circulaires concentriques (12a,12b).
- dispositif d'amorçage selon une des revendications 1 à 3, caractérisé en ce que la plaque (11) est réalisée en un matériau métallique de densité supérieure ou égale à 7,8, par exemple en acier.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9809819 | 1998-07-30 | ||
FR9809819A FR2781877A1 (fr) | 1998-07-30 | 1998-07-30 | Dispositif d'amorcage pour obus explosif |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0977005A1 true EP0977005A1 (fr) | 2000-02-02 |
EP0977005B1 EP0977005B1 (fr) | 2003-05-02 |
Family
ID=9529244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99113226A Expired - Lifetime EP0977005B1 (fr) | 1998-07-30 | 1999-07-08 | Dispositif d'amorçage pour obus explosif |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0977005B1 (fr) |
AT (1) | ATE239205T1 (fr) |
DE (1) | DE69907334T2 (fr) |
ES (1) | ES2196679T3 (fr) |
FR (1) | FR2781877A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2864219A1 (fr) | 2003-12-22 | 2005-06-24 | Giat Ind Sa | Dispositif de deconfinement d'une enveloppe de munition |
FR2906606A1 (fr) * | 2006-09-29 | 2008-04-04 | Giat Ind Sa | Dispositif de deconfinement d'une enveloppe d'une munition. |
EP1978327A3 (fr) * | 2007-04-05 | 2010-06-23 | JUNGHANS Microtec GmbH | Projectile pénétrant |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4735145A (en) | 1987-03-02 | 1988-04-05 | The United States Of America As Represented By The United States Department Of Energy | High temperature detonator |
US5229542A (en) * | 1992-03-27 | 1993-07-20 | The United States Of America As Represented By The United States Department Of Energy | Selectable fragmentation warhead |
-
1998
- 1998-07-30 FR FR9809819A patent/FR2781877A1/fr active Pending
-
1999
- 1999-07-08 ES ES99113226T patent/ES2196679T3/es not_active Expired - Lifetime
- 1999-07-08 AT AT99113226T patent/ATE239205T1/de not_active IP Right Cessation
- 1999-07-08 EP EP99113226A patent/EP0977005B1/fr not_active Expired - Lifetime
- 1999-07-08 DE DE69907334T patent/DE69907334T2/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4735145A (en) | 1987-03-02 | 1988-04-05 | The United States Of America As Represented By The United States Department Of Energy | High temperature detonator |
US5229542A (en) * | 1992-03-27 | 1993-07-20 | The United States Of America As Represented By The United States Department Of Energy | Selectable fragmentation warhead |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2864219A1 (fr) | 2003-12-22 | 2005-06-24 | Giat Ind Sa | Dispositif de deconfinement d'une enveloppe de munition |
EP1548393A1 (fr) | 2003-12-22 | 2005-06-29 | Giat Industries | Dispositif de déconfinement d'une enveloppe de munition |
US7353755B2 (en) | 2003-12-22 | 2008-04-08 | Giat Industries | Deconfinement device for the casing of a piece of ammunition |
AU2004240225B2 (en) * | 2003-12-22 | 2011-02-03 | Giat Industries | Ammunition casing enclosing an explosive |
FR2906606A1 (fr) * | 2006-09-29 | 2008-04-04 | Giat Ind Sa | Dispositif de deconfinement d'une enveloppe d'une munition. |
WO2008040860A3 (fr) * | 2006-09-29 | 2008-05-22 | Nexter Munitions | Dispositif de deconfinement d'une enveloppe d'une munition |
US7930975B2 (en) | 2006-09-29 | 2011-04-26 | Nexter Munitions | Deconfinement device for the casing of a piece of an ammunition |
EP1978327A3 (fr) * | 2007-04-05 | 2010-06-23 | JUNGHANS Microtec GmbH | Projectile pénétrant |
Also Published As
Publication number | Publication date |
---|---|
ATE239205T1 (de) | 2003-05-15 |
DE69907334D1 (de) | 2003-06-05 |
EP0977005B1 (fr) | 2003-05-02 |
ES2196679T3 (es) | 2003-12-16 |
DE69907334T2 (de) | 2004-02-19 |
FR2781877A1 (fr) | 2000-02-04 |
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