EP2383539B1 - Priming device with electric initiation for a projectile - Google Patents
Priming device with electric initiation for a projectile Download PDFInfo
- Publication number
- EP2383539B1 EP2383539B1 EP11290192A EP11290192A EP2383539B1 EP 2383539 B1 EP2383539 B1 EP 2383539B1 EP 11290192 A EP11290192 A EP 11290192A EP 11290192 A EP11290192 A EP 11290192A EP 2383539 B1 EP2383539 B1 EP 2383539B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detonator
- projectile
- priming device
- washer
- plate
- 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.)
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Links
- 230000037452 priming Effects 0.000 title claims description 19
- 230000000977 initiatory effect Effects 0.000 title description 12
- 238000010304 firing Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 239000006223 plastic coating Substances 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000003313 weakening effect Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/005—Combination-type safety mechanisms, i.e. two or more safeties are moved in a predetermined sequence to each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
- F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
- F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile
- F42C15/196—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile by the action of centrifugal or inertia forces on the carrier body, e.g. the carrier having eccentrically mounted weights or eccentric centre of gravity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
- F42C15/31—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids generated by the combustion of a pyrotechnic or explosive charge within the fuze
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
- F42C9/14—Double fuzes; Multiple fuzes
- F42C9/147—Impact fuze in combination with electric time fuze
Definitions
- the technical field of the invention is that of devices for priming a projectile.
- these devices comprise a safety and arming device which ensures a misalignment of the pyrotechnic initiation chain and an electric initiation detonator which is actuated by a setting module. electronic fire.
- the electronic firing module makes it possible to manage different modes of operation for the device, for example: a chronometric mode (with programming before timing firing), an impact mode, a delayed impact mode ...
- the chronometric module incorporates one or more electronic cards as well as an energy source.
- the detonator is most often attached to a movable primer door which is carried by the security and arming device. It is connected to the electronic module by conductors or flexible conductive tracks.
- the document US2004 / 0144279 which constitutes the starting point for the preamble of claim 1, also describes a device for starting a projectile comprising a safety and arming device. It comprises a first electric initiation detonator which is actuated by a module. electronic firing, a second detonator which is secured to a rotor of the safety and arming device. The second detonator is operated by a moving striker.
- This striker is not actuated by the gases of the first detonator but by a spring.
- the object of the invention is to propose an architecture in which integration into a projectile is simplified because the safety and arming device is separated from the electronic module and the pyrotechnic component that is triggered by the latter.
- the subject of the invention is a launching device for a projectile comprising a safety and arming device, a first electric initiation detonator which is actuated by an electronic firing module, a second detonator which is secured to a rotor or flap of the safety and arming device, and a moving striker (15) the second detonator being actuated by said moving striker, characterized in that the moving striker is arranged facing the first detonator so as to be thrown by the gases resulting from the initiation of the latter and is secured to a spacer plate fixed relative to a body of the projectile, the plate having a weakening groove surrounding the striker.
- the weakening groove may delimit a bucket integral with the striker, bucket delimiting a cavity in which the first detonator is positioned.
- the weakening groove may delimit a median wafer having a face facing the first detonator.
- the device may then comprise a washer which will be integral with the body of the projectile, washer against which the plate will be applied and which will comprise a medial portion against which the face of the median wafer will bear.
- the washer may include holes for casting a plastic coating material of the electronic firing module.
- the holes may be made at a circular groove of the washer, groove for receiving a portion of the plastic coating material.
- the first detonator and the striker will advantageously be arranged along the axis of the projectile.
- the first detonator can be connected to an electronic board of the firing module.
- the electronic card may carry a cup surrounding at least in part the first detonator, cup ensuring electrical contact between the card and the first detonator.
- a priming device 1 (or rocket) according to a first embodiment of the invention is incorporated in a body 2 of a projectile.
- the projectile is here of gyro-stabilized type, that is to say animated with a rotation around its axis 16 which is communicated by the tube of the weapon.
- This device comprises a safety and arming device 3 and a first detonator 5, which is electrically initiated, and which is actuated by an electronic firing module 4.
- the safety and arming device 3 is a device comprising a rotor 6 carrying a second detonator 7 which is percussion-type. This device is incorporated in a housing 9a, 9b which is housed in a bore 20 of the body 2 of the projectile.
- the rotor 6 has an unbalance and is disposed in a cage 8 which is pivotally mounted relative to the housing 9a, 9b of the safety device and arming.
- the pivoting is done at the level of pins formed on the front and rear ends of the cage 8 and which are housed in complementary bores of the parts 9a and 9b of the housing.
- the rotor 6 is immobilized in its safety position as shown in FIG. figure 1 by radial pins 10, themselves held in place by a hairspring 11.
- the rotor 6 is also immobilized by a lock 12 in the form of a cylindrical sleeve and which is held pressed against a flat part 13 of the rotor by a spring washer 14.
- the sleeve 12 has an axial bore which allows a tip of a striker 15 to pass through.
- the striker 15 is not a conventional striker set in motion by a self-destruction spring or by the mere inertia of the impact on a target.
- Striker 15 is here instead fixed relative to the body 2 of the projectile (and the priming device).
- the striker 15 is integral with a cylindrical cup 17 which is itself secured to a spacer plate 18.
- the spacer plate 18 is pinched between the bottom 9b of the housing of the safety device and arming 3 and a shoulder 19 of the internal bore 20 of the body 2.
- the plate 18 is fixed with respect to the body 2 of the projectile.
- the plate 18 has a groove 18a which delimits the cup 17. This groove is circular and constitutes an embrittlement of the plate 18 surrounding the striker 15.
- the cup 17 delimits a cavity 17a which is intended to receive the electric detonator 5.
- the electronic firing module 4 here comprises two electronic cards 21a, 21b on which are fixed components that need not be described in detail.
- One of the cards carries in particular a microprocessor which receives by conductors (not shown) appropriate programming provided by a programming unit integral with the weapon.
- the card 21b disposed opposite the bucket 17 carries the first detonator 5 which is housed in the cavity 17a of the bucket.
- the first detonator 5 is connected to the card 21b by its axial contact at a deformable pin connector carried by the card.
- the electronic card carries a cup 22 which partially surrounds the electric detonator 5 and constitutes a second electrical contact for the first detonator 5 (contact between the electronic card and the metal cell of the first detonator).
- the washer 14 is designed to prevent a subsequent return of the sleeve to the rotor and thus includes tabs (not visible in the figures but which are described by FR2689972 ).
- the figure 3 shows the configuration of the device when the electronic module 4 has controlled the initiation of the electric detonator 5.
- the pressure of the gases generated by the latter causes the shearing of the groove 18a delimiting the bucket 17 and the projection of the striker 15 towards the second detonator 7 at the through the socket 12 and the initiation of the latter and the projectile.
- the invention makes it possible to maintain a safety and arming device already defined for a projectile family and, by associating it with an electronic module and an electric detonator, it authorizes the definition of a projectile firing device conferring operating modes on trajectory (firing after programmed delay).
- an advanced priming device is made by limiting the development costs and it becomes possible to standardize the use of a given security and arming device in a whole family of projectiles of different calibres and having electronic structures. different.
- a priming device has been described here, the safety and arming device of which implements the solutions described by the patent. FR2689972 . It is of course possible to define a priming device according to the invention which implements a safety and arming device of different design. It suffices simply that this device comprises a percussion detonator which is integral with a rotor or a shutter, the striker of this detonator being arranged facing the electric detonator so as to be projected by the gases resulting from the initiation of the latter.
- the figure 4 shows in the safety position a second embodiment of a priming device 1 according to the invention.
- This mode differs from the previous one by the shape of the spacer plate 18.
- This plate 18 carrying the striker 15 is represented more precisely in the figure 5 . Note that, unlike the previous mode, the plate 18 has no bucket.
- the plate 18 (which is circular) always comprises a groove 18a of embrittlement which surrounds a base 15a of the striker 15.
- the weakening groove 18a delimits on the plate 18 a cylindrical central plate 18b at which the base 15a of the firing pin is crimped.
- a rear face 18c of the plate is arranged opposite the first detonator 5 ( figure 4 ).
- the device also comprises a washer 23 which is made of plastic. This washer is threaded and is screwed into the bore 20 which thus carries a tapping.
- the washer 23 has an axial hole 24 which connects the first detonator 5 and the rear face 18c of the plate 18.
- a countersink 25 surrounds the axial hole 24 and caps the first detonator 5.
- the washer 23 is shown in front view at the figure 6 . It is noted that it comprises a second counterbore 26 which is situated on the face against which the plate 18 is applied. This second counterbore 26 allows the centering of the plate 18 relative to the device (and in particular with respect to the second detonator 5). .
- the second counterbore 26 is in the same plane as a median portion 23b of the washer 23 against which the face 18c of the median plate 18b of the plate 18 carrying the firing pin 15 rests.
- the washer 23 has three holes 27 regularly distributed angularly (so 120 ° from each other).
- the holes 27 open at a circular groove 28 which is disposed between the middle part 23b of the washer and the second countersink 26.
- each hole 27 is extended by a conical flare 27a on the side of the washer opposite to the circular groove 28.
- the holes 27 are intended to allow the casting of a plastic material 29 ensuring the coating of the electronic firing module 4 on which is fixed the first detonator 5.
- a coating is conventional in the field of ammunition safety devices . It protects the electronic components by damping some of the shocks.
- the coating 29 saves the front face of the first detonator 5.
- the groove 28 can receive the overflow of the plastic coating material after filling.
- the plate 18 Due to the pinched mounting of the plate 18 between the washer 23 and the bottom 9b of the housing of the safety and arming device, the plate 18 is secured to the body 2 of the projectile.
- the washer 23 does not interfere with the operation of the first detonator 5 which is similar to that described above.
- the pressure of the gases that will be generated by the first detonator 5 will cause the shear of the groove 18a delimiting the median plate 18b and the projection of the striker 15 towards the second detonator 7 through the sleeve 12.
- the washer 23 serves to provide an axial support for the middle plate 18b.
- Such a support makes it possible to contain the forces of inertia which are exerted following the direction Fi during the shooting. This prevents shearing of the furrow 18a consecutive shooting without preventing the shear groove 18a as a result of the initiation of the first detonator 5.
- Such a provision makes the device reliable and allows for grooves 18a relatively fragile.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Description
Le domaine technique de l'invention est celui des dispositifs permettant l'amorçage d'un projectile.The technical field of the invention is that of devices for priming a projectile.
D'une façon classique ces dispositifs (souvent baptisés "fusées") comportent un dispositif de sécurité et d'armement qui assure un désalignement de la chaîne pyrotechnique d'initiation ainsi qu'un détonateur à initiation électrique qui est actionné par un module de mise à feu électronique.In a conventional manner these devices (often called "rockets") comprise a safety and arming device which ensures a misalignment of the pyrotechnic initiation chain and an electric initiation detonator which is actuated by a setting module. electronic fire.
Ces dispositifs sont bien connus de l'Homme du Métier. On pourra par exemple consulter le brevet
Le module de mise à feu électronique permet de gérer différents modes de fonctionnement pour le dispositif, par exemple : un mode chronométrique (avec une programmation avant tir de la chronométrie), un mode impact, un mode impact retardé ...The electronic firing module makes it possible to manage different modes of operation for the device, for example: a chronometric mode (with programming before timing firing), an impact mode, a delayed impact mode ...
Le module chronométrique incorpore une ou plusieurs cartes électroniques ainsi qu'une source d'énergie. Le détonateur est le plus souvent solidaire d'un volet porte amorce mobile qui est porté par le dispositif de sécurité et d'armement. Il est relié au module électronique par des conducteurs ou des pistes conductrices souples.The chronometric module incorporates one or more electronic cards as well as an energy source. The detonator is most often attached to a movable primer door which is carried by the security and arming device. It is connected to the electronic module by conductors or flexible conductive tracks.
L'intégration de ce composant pyrotechnique dans un projectile est une opération délicate qui présente certains risques pyrotechniques.The integration of this pyrotechnic component in a projectile is a delicate operation that presents certain pyrotechnic risks.
Le document
Ce percuteur n'est pas actionné par les gaz du premier détonateur mais par un ressort.This striker is not actuated by the gases of the first detonator but by a spring.
Par ailleurs, la définition d'un nouveau projectile impose l'étude et la mise au point d'une fusée complète incorporant le dispositif de sécurité et d'armement et le module électronique. Ces deux dispositifs sont en effet le plus souvent étroitement imbriqués et il n'est pas possible de modifier l'un sans modifier également l'autre. De telles modifications sont particulièrement délicates dans le domaine des projectiles de moyens calibre (calibre inférieur à 75 mm) car les composants sont de dimensions réduites et l'espace disponible est également limité.In addition, the definition of a new projectile requires the study and development of a complete rocket incorporating the safety and arming device and the electronic module. These two devices are in fact most often closely interwoven and it is not possible to modify one without modifying the other. Such modifications are particularly delicate in the field of projectiles of medium size (caliber less than 75 mm) because the components are small and the available space is also limited.
L'invention a pour but de proposer une architecture dans laquelle l'intégration dans un projectile est simplifiée car le dispositif de sécurité et d'armement est séparé du module électronique et du composant pyrotechnique qui est déclenché par ce dernier.The object of the invention is to propose an architecture in which integration into a projectile is simplified because the safety and arming device is separated from the electronic module and the pyrotechnic component that is triggered by the latter.
Ainsi, l'invention a pour objet un dispositif d'amorçage d'un projectile comportant un dispositif de sécurité et d'armement, un premier détonateur à initiation électrique qui est actionné par un module de mise à feu électronique, un deuxième détonateur qui est solidaire d'un rotor ou volet du dispositif de sécurité et d'armement, et un percuteur mobile (15) le deuxième détonateur étant actionné par ledit percuteur mobile, caractérisé en ce que le percuteur mobile est disposé en regard du premier détonateur de façon à être projeté par les gaz résultant de l'initiation de ce dernier et est solidaire d'une plaque entretoise fixe par rapport à un corps du projectile, la plaque comportant un sillon de fragilisation entourant le percuteur.Thus, the subject of the invention is a launching device for a projectile comprising a safety and arming device, a first electric initiation detonator which is actuated by an electronic firing module, a second detonator which is secured to a rotor or flap of the safety and arming device, and a moving striker (15) the second detonator being actuated by said moving striker, characterized in that the moving striker is arranged facing the first detonator so as to be thrown by the gases resulting from the initiation of the latter and is secured to a spacer plate fixed relative to a body of the projectile, the plate having a weakening groove surrounding the striker.
Le sillon de fragilisation pourra délimiter un godet solidaire du percuteur, godet délimitant une cavité dans laquelle se positionne le premier détonateur.The weakening groove may delimit a bucket integral with the striker, bucket delimiting a cavity in which the first detonator is positioned.
Selon un autre mode de réalisation, le sillon de fragilisation pourra délimiter une plaquette médiane comportant une face en regard du premier détonateur.According to another embodiment, the weakening groove may delimit a median wafer having a face facing the first detonator.
Le dispositif pourra alors comporter une rondelle qui sera solidaire du corps du projectile, rondelle contre laquelle sera appliquée la plaque et qui comportera une partie médiane contre laquelle s'appuiera la face de la plaquette médiane.The device may then comprise a washer which will be integral with the body of the projectile, washer against which the plate will be applied and which will comprise a medial portion against which the face of the median wafer will bear.
La rondelle pourra comporter des perçages permettant la coulée d'un matériau plastique d'enrobage du module de mise à feu électronique.The washer may include holes for casting a plastic coating material of the electronic firing module.
Les perçages pourront être réalisés au niveau d'une rainure circulaire de la rondelle, rainure destinée à recevoir une partie du matériau plastique d'enrobage.The holes may be made at a circular groove of the washer, groove for receiving a portion of the plastic coating material.
Le premier détonateur et le percuteur seront avantageusement disposés suivant l'axe du projectile.The first detonator and the striker will advantageously be arranged along the axis of the projectile.
Le premier détonateur pourra être connecté à une carte électronique du module de mise à feu.The first detonator can be connected to an electronic board of the firing module.
La carte électronique pourra porter une coupelle entourant au moins en partie le premier détonateur, coupelle assurant un contact électrique entre la carte et le premier détonateur.The electronic card may carry a cup surrounding at least in part the first detonator, cup ensuring electrical contact between the card and the first detonator.
L'invention sera mieux comprise à la lecture de la description qui va suivre d'un mode particulier de réalisation, description faite en référence aux dessins annexés et dans lesquels :
- la
figure 1 est une vue partielle en coupe d'un projectile incorporant un dispositif d'amorçage selon un premier mode de réalisation de l'invention, dispositif représenté en position de sécurité, - la
figure 2 montre ce même dispositif en position armée, - la
figure 3 montre le dispositif après initiation du premier détonateur, - la
figure 4 est une vue partielle en coupe d'un dispositif d'amorçage selon un deuxième mode de réalisation de l'invention, dispositif représenté en position de sécurité, - la
figure 5 est une vue de la plaque portant le percuteur qui est mise en oeuvre dans ce deuxième mode de réalisation, - la
figure 6 est une vue frontale de la rondelle sur laquelle s'appuie la plaque porte percuteur dans ce deuxième mode de réalisation.
- the
figure 1 is a partial sectional view of a projectile incorporating a priming device according to a first embodiment of the invention, device shown in a safety position, - the
figure 2 shows this same device in armed position, - the
figure 3 shows the device after initiation of the first detonator, - the
figure 4 is a partial sectional view of a priming device according to a second embodiment of the invention, device shown in a safety position, - the
figure 5 is a view of the plate carrying the striker which is implemented in this second embodiment, - the
figure 6 is a front view of the washer on which the striker plate bears in this second embodiment.
En se reportant à la
Ce dispositif comporte un dispositif de sécurité et d'armement 3 ainsi qu'un premier détonateur 5, qui est à initiation électrique, et qui est actionné par un module de mise à feu électronique 4.This device comprises a safety and
Le dispositif de sécurité et d'armement 3 est un dispositif comprenant un rotor 6 portant un deuxième détonateur 7 qui est de type initiable par percussion. Ce dispositif est incorporé dans un boîtier 9a,9b qui se loge dans un alésage 20 du corps 2 du projectile.The safety and
Ce dispositif est décrit par le brevet
Comme décrit par ce brevet, le rotor 6 comporte un balourd et il est disposé dans une cage 8 qui est montée pivotante par rapport au boîtier 9a,9b du dispositif de sécurité et d'armement. Le pivotement se fait au niveau de tourillons formé sur les extrémités avant et arrière de la cage 8 et qui se logent dans des alésages complémentaires des parties 9a et 9b du boîtier.As described by this patent, the
Le rotor 6 est immobilisé dans sa position de sécurité telle que représentée à la
Le rotor 6 est aussi immobilisé par un verrou 12 en forme de douille cylindrique et qui est maintenu appliqué contre un méplat 13 du rotor par une rondelle ressort 14.The
La douille 12 comporte un perçage axial qui laisse passer une pointe d'un percuteur 15.The
Cette structure est identique à celle décrite par
Conformément à l'invention, le percuteur 15 n'est pas un percuteur classique mis en mouvement par un ressort d'autodestruction ou bien par la simple inertie de l'impact sur une cible.According to the invention, the
Le percuteur 15 est ici au contraire fixe par rapport au corps 2 du projectile (et du dispositif d'amorçage).
Le percuteur 15 est solidaire d'un godet cylindrique 17 qui est lui-même solidaire d'une plaque entretoise 18.The
On voit sur la
On remarque sur la
Le godet 17 délimite par ailleurs une cavité 17a qui est destinée à recevoir le détonateur électrique 5.The
On remarque sur la
La carte 21b disposée en regard du godet 17 porte le premier détonateur 5 qui se loge dans la cavité 17a du godet. Le premier détonateur 5 est raccordé sur la carte 21b par son contact axial au niveau d'un connecteur à broche déformable porté par la carte.The
On remarque sur la
Le fonctionnement du dispositif est le suivant :
- La
figure 2 montre le dispositif après sa sortie hors du tube de l'arme et après une dizaine de mètres de trajectoire.
- The
figure 2 shows the device after its exit out of the tube of the weapon and after ten meters of trajectory.
Lors du tir du projectile, l'accélération axiale due au tir a conduit la douille 12 à traverser la rondelle 14. Elle ne bloque donc plus le rotor 6. La rondelle 14 est conçue pour empêcher un retour ultérieur de la douille vers le rotor et comporte ainsi des languettes (non visibles sur les figures mais qui sont décrites par
La rotation du projectile a provoqué par ailleurs le déroulement du spiral 11 ce qui a assuré la sécurité de bouche du projectile. A l'issue du délai nécessaire pour dérouler le spiral 11, les goupilles radiales 10 ont été éjectées hors du rotor 6 qui a pu alors (à cause de son balourd) adopter sa position armée avec le deuxième détonateur 7 aligné suivant l'axe 16 du projectile et prêt à être initié par le percuteur 15. C'est cette disposition qui est montrée par la
La
On voit que l'invention permet de conserver un dispositif de sécurité et d'armement déjà défini pour une famille de projectile et, en l'associant à un module électronique et un détonateur électrique, elle autorise la définition d'un dispositif d'amorçage de projectile conférant des modes de fonctionnement sur trajectoire (mise à feu après délai programmé).It can be seen that the invention makes it possible to maintain a safety and arming device already defined for a projectile family and, by associating it with an electronic module and an electric detonator, it authorizes the definition of a projectile firing device conferring operating modes on trajectory (firing after programmed delay).
On réalise ainsi un dispositif d'amorçage évolué en limitant les coûts de développement et il devient possible de standardiser l'emploi d'un dispositif de sécurité et d'armement donné dans toute une famille de projectiles de calibres différents et ayant des électroniques de structures différentes.Thus, an advanced priming device is made by limiting the development costs and it becomes possible to standardize the use of a given security and arming device in a whole family of projectiles of different calibres and having electronic structures. different.
On a décrit ici un dispositif d'amorçage dont le dispositif de sécurité et d'armement met en oeuvre les solutions décrites par le brevet
La
Ce mode diffère du précédent par la forme de la plaque entretoise 18.This mode differs from the previous one by the shape of the
Cette plaque 18 portant le percuteur 15 est représentée de façon plus précise à la
Le sillon de fragilisation 18a délimite sur la plaque 18 une plaquette médiane 18b cylindrique au niveau de laquelle est sertie la base 15a du percuteur. Une face arrière 18c de la plaque est disposée en regard du premier détonateur 5 (
On remarque sur la
Un lamage 25 entoure le trou axial 24 et coiffe le premier détonateur 5. La rondelle 23 est représentée en vue frontale à la
Le deuxième lamage 26 se trouve dans le même plan qu'une partie médiane 23b de la rondelle 23 contre laquelle s'appuie la face 18c de la plaquette médiane 18b de la plaque 18 portant le percuteur 15.The
On remarque sur la
Par ailleurs chaque perçage 27 est prolongé par un évasement conique 27a du côté de la rondelle opposé à la rainure circulaire 28.Moreover each
Les perçages 27 sont destinés à permettre la coulée d'un matériau plastique 29 assurant l'enrobage du module de mise à feu électronique 4 sur lequel est fixé le premier détonateur 5. Un tel enrobage est classique dans le domaine des dispositifs de sécurité de munitions. Il permet de protéger les composants électroniques en amortissant une partie des chocs subis.The
On remarque que, grâce au premier lamage 25, l'enrobage 29 épargne la face avant du premier détonateur 5.Note that, thanks to the
La rainure 28 permet de recevoir le trop plein du matériau plastique d'enrobage à l'issue du remplissage.The
Ainsi la rondelle 23 se trouve en partie incrustée dans le matériau d'enrobage 29.Thus the
On remarque sur la
Du fait du montage pincé de la plaque 18 entre la rondelle 23 et le fond 9b du boîtier du dispositif de sécurité et d'armement, la plaque 18 se trouve solidaire du corps 2 du projectile.Due to the pinched mounting of the
La rondelle 23 ne gêne pas le fonctionnement du premier détonateur 5 qui est analogue à celui décrit précédemment. La pression des gaz qui seront engendrés par le premier détonateur 5 provoquera le cisaillement du sillon 18a délimitant la plaquette médiane 18b et la projection du percuteur 15 vers le deuxième détonateur 7 au travers de la douille 12.The
La rondelle 23 a pour fonction de fournir un appui axial pour la plaquette médiane 18b. Un tel appui permet de contenir les efforts d'inertie qui s'exercent suivant la direction Fi lors du tir. On empêche ainsi tout cisaillement du sillon 18a consécutif au tir sans pour autant empêcher le cisaillement du sillon 18a comme suite à l'initiation du premier détonateur 5. Une telle disposition fiabilise le dispositif et permet de réaliser des sillons 18a relativement fragiles.The
Claims (9)
- A priming device (1) for a projectile incorporating a safety and arming device (3), a first electrically initiated detonator (5) that is activated by an electronic firing module (4), a second detonator (7) integral with a rotor (6) or flap of the safety and arming device (3), and a mobile firing pin (15), the second detonator (17) being activated by the said mobile firing pin (15), characterised in that the mobile firing pin (15) is arranged opposite a first detonator (5) so as to be projected by the gases resulting from the ignition of the latter and is integral with a spacer plate (18) fixed with respect to a body (2) of the projectile, the plate (18) incorporating an embrittlement groove (18a) surrounding the firing pin (15).
- A priming device according to Claim 1, characterised in that the embrittlement groove (18a) delimits a cup (17) integral with the firing pin, such cup (17) delimiting a cavity (17a) in which the first detonator (5) is positioned.
- A priming device according to Claim 2, characterised in that the embrittlement groove (18a) delimits a small median plate (18b) incorporating a face (18c) lying opposite the first detonator.
- A priming device according to Claim 3, characterised in that it device incorporates a washer (23) integral with the body (2) of the projectile, such washer against which the plate (18) is pressed and which incorporates a median part (23b) against which the face (18c) of the median plate (18b) is pressed.
- A priming device according to Claim 4, characterised in that the washer (23) incorporates drill holes (27) to enable a plastic coating material (29) for the electronic firing module (4) to be cast.
- A priming device according to Claim 5, characterised in that the drill holes (27) are made in a circular groove (28) in the washer (23), such groove intended to receive part of the plastic coating material (29).
- A priming device according to one of Claims 1 to 6, characterised in that the first detonator (5) and the firing pin (15) are arranged along the projectile's axis.
- A priming device according to Claim 7, characterised in that the first detonator (5) is connected to an electronic card (21b) of the firing module (4).
- A priming device according to Claim 8, characterised in that the electronic card (21b) carries a cap (22) at least partially surrounding the first detonator (5), such cap ensuring an electrical contact between the card (21b) and the first detonator.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1001799A FR2959303B1 (en) | 2010-04-27 | 2010-04-27 | ELECTRICALLY INITIATED STARTING DEVICE FOR PROJECTILE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2383539A1 EP2383539A1 (en) | 2011-11-02 |
EP2383539B1 true EP2383539B1 (en) | 2012-12-12 |
Family
ID=43243711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11290192A Active EP2383539B1 (en) | 2010-04-27 | 2011-04-20 | Priming device with electric initiation for a projectile |
Country Status (4)
Country | Link |
---|---|
US (1) | US8631743B2 (en) |
EP (1) | EP2383539B1 (en) |
ES (1) | ES2401179T3 (en) |
FR (1) | FR2959303B1 (en) |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877378A (en) * | 1954-09-28 | 1975-04-15 | Us Army | Safety and arming mechanism |
DE1229420B (en) * | 1963-04-10 | 1966-11-24 | Prb Nv | Bullet fuse with double ignition |
US3397640A (en) * | 1966-10-28 | 1968-08-20 | Gen Electric | Fuze with improved time delay and self-destruct mechanism |
LU53848A1 (en) * | 1967-06-09 | 1969-04-22 | ||
US3595169A (en) * | 1969-09-18 | 1971-07-27 | Gen Electric | Time delay fuze |
DE2255547C3 (en) * | 1972-11-13 | 1979-10-11 | Diehl Gmbh & Co, 8500 Nuernberg | Switching device on electric projectile detonators |
GB1422990A (en) * | 1973-06-13 | 1976-01-28 | Diehl | Safety device on an electrical projectile fuze |
CH622885A5 (en) * | 1978-07-27 | 1981-04-30 | Redon Trust | |
US4242964A (en) * | 1978-12-18 | 1981-01-06 | Ares, Inc. | Explosive fuse for projectile |
DE3165530D1 (en) * | 1980-07-02 | 1984-09-20 | Rheinmetall Gmbh | Fuse for spinning projectiles |
DE3049082C2 (en) * | 1980-12-24 | 1984-08-23 | Diehl GmbH & Co, 8500 Nürnberg | Safety device for a detonator |
EP0068534B1 (en) * | 1981-06-30 | 1985-01-23 | Werkzeugmaschinenfabrik Oerlikon-Bührle AG | Safety means for a fuze of a spin-stabilised projectile |
FR2533686B1 (en) * | 1982-09-24 | 1987-01-02 | Manurhin | SECURITY DEVICE WITH A ROTATING CAGE FOR A GIRATORY PROJECTILE |
DE3446314A1 (en) * | 1984-12-19 | 1986-06-19 | Rheinmetall GmbH, 4000 Düsseldorf | SKULL HEAD |
US5243912A (en) * | 1991-12-09 | 1993-09-14 | General Electric Co. | Arming delay, dual environment safe, fuze |
FR2689972B1 (en) | 1992-04-14 | 1995-08-11 | Manurhin Defense | SECURITY AND ARMING DEVICE FOR A PROJECTILE ROCKET COMPRISING AN ANTI-VIBRATORY MEANS. |
US5271327A (en) | 1992-06-19 | 1993-12-21 | Alliant Techsystems Inc. | Elecro-mechanical base element fuze |
FR2724750B1 (en) * | 1994-09-16 | 1996-12-06 | Thomson Csf | ELECTRONIC CARD WITH PERFORMANCE INDICATOR |
IL121428A (en) * | 1997-07-30 | 2003-01-12 | Israel Military Ind | Self-destruct fuze for submunition grenade |
FR2790077B1 (en) * | 1999-02-18 | 2001-12-28 | Livbag Snc | ELECTRO-PYROTECHNIC IGNITER WITH INTEGRATED ELECTRONICS |
DE10000177A1 (en) * | 2000-01-05 | 2001-07-12 | Junghans Feinwerktechnik Gmbh | Ignition device, in particular for a mortar grenade |
US7320285B1 (en) * | 2005-03-31 | 2008-01-22 | The United States Of America As Represented By The Secretary Of The Navy | Safe and arm device and method of using the same |
JP3803636B2 (en) * | 2002-12-26 | 2006-08-02 | 本田技研工業株式会社 | Ignition device for bus connection |
DE10302967B4 (en) * | 2003-01-25 | 2006-04-06 | Junghans Feinwerktechnik Gmbh & Co. Kg | Projectile fuze with a force element |
US7600475B1 (en) * | 2005-03-31 | 2009-10-13 | The United States Of America As Represented By The Secretary Of The Army | Multi-mode fuze |
FR2912192B1 (en) * | 2007-02-07 | 2010-09-10 | Eris | HIGH PERFORMANCE BLIND RIVET, IN PARTICULAR FOR FIXING STRUCTURE |
US8091478B1 (en) * | 2008-01-22 | 2012-01-10 | The United States Of America As Represented By The Secretary Of The Army | System and method for electronically discriminating a target |
FR2944348A1 (en) * | 2009-04-10 | 2010-10-15 | Nexter Munitions | PERCUSSION MUNITING DEVICE |
-
2010
- 2010-04-27 FR FR1001799A patent/FR2959303B1/en not_active Expired - Fee Related
-
2011
- 2011-04-20 EP EP11290192A patent/EP2383539B1/en active Active
- 2011-04-20 ES ES11290192T patent/ES2401179T3/en active Active
- 2011-04-21 US US13/091,789 patent/US8631743B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
ES2401179T3 (en) | 2013-04-17 |
US8631743B2 (en) | 2014-01-21 |
FR2959303A1 (en) | 2011-10-28 |
EP2383539A1 (en) | 2011-11-02 |
FR2959303B1 (en) | 2012-04-06 |
US20110259226A1 (en) | 2011-10-27 |
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