EP0773424B1 - Charge génératrice de noyau ayant une tenue à l'accélération améliorée - Google Patents
Charge génératrice de noyau ayant une tenue à l'accélération améliorée Download PDFInfo
- Publication number
- EP0773424B1 EP0773424B1 EP19960402311 EP96402311A EP0773424B1 EP 0773424 B1 EP0773424 B1 EP 0773424B1 EP 19960402311 EP19960402311 EP 19960402311 EP 96402311 A EP96402311 A EP 96402311A EP 0773424 B1 EP0773424 B1 EP 0773424B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- coating
- explosive charge
- casing
- explosively formed
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
- F42B1/02—Shaped or hollow charges
- F42B1/028—Shaped or hollow charges characterised by the form of the liner
Definitions
- the technical field of the invention is that of fillers nucleus generators.
- These charges generally include a charge explosive placed in an envelope and a coating having overall the shape of a spherical cap.
- the coating When the explosive detonates, the coating is set in motion by the incident pressure wave. It is deforms by turning "in a glove", that is to say that it turns into a projectile (or nucleus) whose front part is formed by the axial area of the covering and the rear part is a skirt formed by the periphery of the coating.
- Patent FR2627580 describes such a charge.
- nucleus-generating charge When a nucleus-generating charge is placed in a vector such as a shell, from which it is intended to be ejected on trajectory, it is subjected to efforts significant acceleration, both when firing the shell only when the charge is ejected from it.
- the problem of the behavior of the coating acceleration is all the more complex as the load is in principle subject to a vector when firing a vector first acceleration, then it knows when ejecting of the charge outside the vector a second acceleration having an opposite direction to that of the first.
- the coating material is a ductile material or a material for which the formation of nucleus is disturbed by the presence of local constraints on the coating.
- the core generating charges are subject during the storage phases at thermal constraints which cause dilations with different amplitudes for the explosive charge and for the metal shell.
- the filler according to the invention thus has excellent resistance of coating and loading to constraints of acceleration undergone inside the vector without cause disturbances in the formation of the nucleus.
- the subject of the invention is a charge generating nucleus with an explosive charge placed in a envelope and coating intended to be set in motion by the detonation of the explosive charge, the coating being set up by a support having a cylindrical bearing adjusted to the internal diameter of the envelope, support rendered secured to the envelope by connecting means, load characterized in that the support is in contact with the explosive charge and thus ensures the axial maintenance of the explosive charge in relation to the enclosure.
- the support can be annular or have a substantially conical surface in contact with the explosive charge.
- the support may be a cup applied to the explosive charge and carrying a housing intended to receive the coating.
- the material of the cup will preferably have a shock impedance lower than that of the coating.
- the support is fixed to the envelope by connecting means which include a deformable washer disposed between the support and a support surface integral with the envelope.
- the deformable washer may include tongues springs, regularly distributed angularly and which are arranged to allow deformation by washer compression.
- the spring tabs may have a shape of arcs of circle concentric to the washer.
- a charge generating core 1 comprises in known manner a cylindrical envelope 2 inside which is placed an explosive charge 3 to which a metal coating 4.
- the explosive charge is intended to be initiated by ignition means of known type and not shown here.
- the coating 4 is placed on an annular support 5 which has a cylindrical surface 5a having a diameter equal to the internal diameter of the envelope.
- the diameter of the coating 4 is here less than the diameter of the bearing 5a therefore to that of the envelope 2.
- the support 5 has a convex face 6 which is in contact with explosive charge 3 and it has a circular collar 7 which bears on the end of envelope 2.
- the collar 7 is regularly pierced with holes angularly distributed and which allow it to be joined with the casing 2 by means of screws 8.
- the coating 4 is therefore housed in a bore 5b of the support 5 and its rear face 4a is supported, on the one hand on explosive charge 3 (at a middle part of the coating), and on the other hand on a surface 9 of the support 5 (at the periphery of the coating).
- This load is intended to be placed in a vector (not shown), such as an artillery cargo shell.
- the load is then subjected to acceleration forces which have the effect of pushing the explosive charge 3 against the annular support 5.
- the latter which is integral with the casing 2 thanks to the screws 8, ensures the axial maintenance of the loading 3, thereby reducing the stresses in the coating 4.
- the coating is in fact subject only to its own inertial forces which can be balanced by bonding of the coating on the support 5 (at the level of the surface 9) and on loading 3.
- the support 5 we will size the support 5 so that it ensures its axial holding function for the explosive charge.
- the coating is deformed by the shock wave communicated to it by the explosive, either directly or through the support 5 which also makes it possible to modulate the impulse undergone by the coating.
- the support 5 thus ensures axial maintenance of the load without an obstacle being placed in front of the covering. He ... not therefore does not disturb the formation of the nucleus.
- the coating is supported at its periphery by the support, and it is possible to adjust the thickness of this last depending on the thickness of the coating and its deformation characteristics.
- Figure 2 shows a second embodiment of the invention in which the annular support 5 is in contact with the explosive charge at a conical surface 10. This embodiment of the support is more rigid than the previous embodiment.
- the coating is glued to the support 5 at a surface 9 and glued to load 3 and it is essentially subjected to its own inertial forces.
- Figure 3 shows a third embodiment of the invention in which the support 5 is no longer annular but affects the shape of a cup applied to the explosive charge 3 and carrying a housing 11 intended for receive the coating 4.
- the support / cup 5 has a cylindrical seat 5a having a diameter equal to inner diameter of the casing 2.
- the connecting means of the support 5 to envelope 2 include a deformable washer 12 which is arranged between an annular face 13 of the support 5 and a nut 14 screwed to the end of the casing 2.
- the nut 14 thus constitutes an integral bearing surface of envelope 2.
- the internal diameters D1 of the washer 12 and D2 of the nut 14 are chosen greater than the external diameter of the liner 4, so there is no obstacle placed forward of the coating and likely to disrupt the formation of the nucleus.
- the washer 12 is shown in more detail in Figures 4a and 4b. It is made of spring steel sheet stamped and it has spring tabs 15 (here four tabs), evenly distributed angularly, and which are supported on the annular face 13 of the support 5.
- These spring tabs 15 have here the shape of arcs of circles concentric with the washer 12 and they are obtained by cutting the washer.
- the washer 12 is deformable into compression and it makes it possible to make up for the axial clearances between explosive charge 3 (carrying support 5) and envelope 2, mainly clearances due to expansion differential thermal.
- the washer secures (with support 5) the axial maintenance of the load 3 relative to the casing 2 of the load.
- the advantage of this embodiment is that it allows provide excellent mechanical resistance to acceleration load ejection while allowing expansion very reliably and reproducibly.
- the washer 12 must therefore be defined so that the tabs come to bear on the support and have an orientation such as the direction of rotation of the shell corresponds to an arc oriented from the base of the tongue towards its free end.
- the cup 5 is interposed between the explosive charge and coating. At the initiation of loading it transmits the shock it receives from the explosive to the coating.
- a metallic material will preferably be chosen, the shock impedance is lower than that of the coating.
- the support / cup 5 reduces the influence of a leak gas at the periphery of the coating at the time of initiation of the explosive.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Description
- la figure 1 représente schématiquement en coupe longitudinale partielle une charge génératrice de noyau selon un premier mode de réalisation de l'invention,
- la figure 2 représente en coupe longitudinale partielle une charge génératrice de noyau selon un deuxième mode de réalisation de l'invention,
- la figure 3 représente en coupe longitudinale partielle une charge génératrice de noyau selon un troisième mode de réalisation de l'invention,
- les figures 4a et 4b montrent la rondelle ressort utilisée dans ce troisième mode de réalisation, la figure 4b étant une coupe suivant le plan repéré AA sur la figure 4a.
Claims (9)
- Charge génératrice de noyau (1) comportant un chargement explosif (3) disposé dans une enveloppe (2) et un revêtement (4) destiné à être mis en mouvement par la détonation du chargement explosif, le revêtement (4) étant mis en place par un support (5) comportant une portée cylindrique (5a) ajustée au diamètre interne de l'enveloppe (2), support rendu solidaire de l'enveloppe par des moyens de liaison, charge caractérisée en ce que le support (5) est en contact avec le chargement explosif (3) et assure ainsi le maintien axial du chargement explosif (3) par rapport à l'enveloppe (2).
- Charge génératrice de noyau selon la revendication 1, caractérisée en ce que le support (5) est annulaire.
- Charge génératrice de noyau selon la revendication 2, caractérisée en ce que le support (5) comporte une surface (10) sensiblement conique en contact avec le chargement explosif (3) .
- Charge génératrice de noyau selon la revendication 1, caractérisée en ce que le support (5) est une coupelle appliquée sur le chargement explosif (3) et portant un logement (11) destiné à recevoir le revêtement (4).
- Charge génératrice de noyau selon la revendication 42, caractérisée en ce que le matériau de la coupelle (5) a une impédance de choc inférieure à celle du revêtement (4).
- Charge génératrice de noyau selon la revendication 5, caractérisée en ce que le revêtement (4) est réalisé en Tantale et la coupelle (5) en alliage d'aluminium.
- Charge génératrice de noyau selon une des revendications 1 à 6, caractérisée en ce que le support (5) est fixé à l'enveloppe (2) par des moyens de liaison qui comprennent une rondelle (12) déformable disposée entre le support (5) et une surface d'appui (14) solidaire de l'enveloppe (2).
- Charge génératrice de noyau selon la revendication 7, caractérisée en ce que la rondelle déformable (12) comporte des languettes ressorts (15), régulièrement réparties angulairement et qui sont disposées de façon à permettre une déformation par compression de la rondelle (12).
- Charge génératrice de noyau selon la revendication 8, caractérisée en ce que les languettes ressorts (15) ont une forme d'arcs de cercle concentriques à la rondelle (12).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9513378A FR2741142B1 (fr) | 1995-11-13 | 1995-11-13 | Charge generatrice de noyau ayant une tenue a l'acceleration amelioree |
FR9513378 | 1995-11-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0773424A1 EP0773424A1 (fr) | 1997-05-14 |
EP0773424B1 true EP0773424B1 (fr) | 2000-09-20 |
Family
ID=9484474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960402311 Expired - Lifetime EP0773424B1 (fr) | 1995-11-13 | 1996-10-30 | Charge génératrice de noyau ayant une tenue à l'accélération améliorée |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0773424B1 (fr) |
DE (1) | DE69610395T2 (fr) |
FR (1) | FR2741142B1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2812384B1 (fr) | 2000-07-26 | 2002-12-06 | Giat Ind Sa | Dispositif de neutralisation d'une charge utile |
DE10221759B4 (de) * | 2002-05-16 | 2005-03-31 | Diehl Munitionssysteme Gmbh & Co. Kg | Gefechtskopf |
DE102012007203B4 (de) * | 2012-04-12 | 2015-03-05 | TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH | Verfahren und Einrichtung zur Erhöhung der Leistung einer Hohlladung mit kunststoffgebundenem Sprengstoff bei tiefen Temperaturen |
EP3278052B1 (fr) * | 2015-04-02 | 2019-12-25 | Hunting Titan, Inc. | Dispositif de retenue de revêtement encliquetable |
GB2582670B8 (en) * | 2019-05-25 | 2023-10-25 | Alford Ip Ltd | Improvements in or relating to explosive charges |
DE102022003744A1 (de) | 2022-10-12 | 2024-04-18 | Diehl Defence Gmbh & Co. Kg | Feinabstimmung eines explosiv geformten Projektils |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2086531A5 (en) * | 1970-04-01 | 1971-12-31 | Clausin Pierre | Plate charges - insulating screen |
DE2046372C3 (de) * | 1970-09-19 | 1978-11-23 | Dynamit Nobel Ag, 5210 Troisdorf | Hohlladung |
DE2807309C1 (de) * | 1978-02-21 | 1987-07-23 | Messerschmitt Boelkow Blohm | Sprengladung mit stachel- oder projektilbildenden Belegungen |
FR2627580B1 (fr) | 1988-02-18 | 1993-02-19 | France Etat Armement | Procede permettant d'obtenir un noyau comportant des ailettes stabilisatrices et charge militaire faisant application |
DE3933955A1 (de) * | 1989-10-11 | 1991-04-18 | Diehl Gmbh & Co | Submunition mit einer hohlladung |
SE502461C2 (sv) * | 1991-07-01 | 1995-10-23 | Bofors Ab | Sätt vid projektilbildande explosiva laddningar |
-
1995
- 1995-11-13 FR FR9513378A patent/FR2741142B1/fr not_active Expired - Fee Related
-
1996
- 1996-10-30 EP EP19960402311 patent/EP0773424B1/fr not_active Expired - Lifetime
- 1996-10-30 DE DE1996610395 patent/DE69610395T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69610395D1 (de) | 2000-10-26 |
DE69610395T2 (de) | 2001-03-08 |
FR2741142B1 (fr) | 1998-01-02 |
FR2741142A1 (fr) | 1997-05-16 |
EP0773424A1 (fr) | 1997-05-14 |
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