EP0773424A1 - Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit - Google Patents
Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit Download PDFInfo
- Publication number
- EP0773424A1 EP0773424A1 EP96402311A EP96402311A EP0773424A1 EP 0773424 A1 EP0773424 A1 EP 0773424A1 EP 96402311 A EP96402311 A EP 96402311A EP 96402311 A EP96402311 A EP 96402311A EP 0773424 A1 EP0773424 A1 EP 0773424A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- coating
- core
- charge
- envelope
- 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
- 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 nucleus-generating charges.
- These charges generally include an explosive charge placed in an envelope and a coating generally having the shape of a spherical cap.
- the coating is set in motion by the incident pressure wave. It deforms by turning over "like a thimble", that is to say it transforms into a projectile (or core) whose front part is formed by the axial zone of the covering and the rear part is a formed skirt 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 its trajectory, it is subject to significant acceleration forces, both when the shell is fired and when the charge is ejected out of it.
- the problem of the resistance of the coating to acceleration forces is all the more complex as the load is in principle subjected during the firing of a vector to a first acceleration, then it experiences during the ejection of the load out of the vector a second acceleration having a direction opposite to that of the first.
- the coating material is a ductile material or a material for which the formation of the core is disturbed by the presence of local stresses on the coating.
- the charges generating the core are subjected during the storage phases to thermal stresses which cause expansions the amplitude of which is different for the explosive charge and for the metallic envelope.
- the load according to the invention thus exhibits excellent resistance of the coating and of the loading to the acceleration constraints undergone inside the vector without cause disturbances in the formation of the nucleus.
- the subject of the invention is a core-generating charge comprising an explosive charge placed in an envelope and a coating intended to be set in motion by the detonation of the explosive charge, charge characterized in that the coating is placed on a support. comprising a cylindrical surface adjusted to the internal diameter of the envelope, support made integral with the envelope by connecting means and thus ensuring the axial maintenance of the explosive charge relative to the envelope.
- the support may 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 cup material will preferably have a lower shock impedance than that of the coating.
- connection means which comprise a deformable washer disposed between the support and a bearing surface integral with the envelope.
- the deformable washer may include spring tabs, regularly angularly distributed and which are arranged so as to allow deformation by compression of the washer.
- the spring tabs may have the form of arcs of a circle concentric with the washer.
- a charge generating the core 1 comprises, in a known manner, a cylindrical envelope 2 inside which an explosive charge 3 is placed on which a metallic coating 4 is applied.
- the explosive charge is intended to be initiated by means of initiation 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 surface 5a, therefore that of the envelope 2.
- the support 5 has a convex face 6 which is in contact with the explosive charge 3 and it has a circular flange 7 which bears on the end of the envelope 2.
- the flange 7 is pierced with regularly angularly distributed holes which allow it to be joined to 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 the explosive charge 3 (at the level of a middle part of the coating), and on the other hand on a scope 9 of the support 5 (at the periphery of the coating).
- This charge is intended to be placed in a vector (not shown), such as an artillery cargo shell.
- the direction of acceleration which will be undergone by the charge at the time of its ejection on trajectory will be opposite.
- the charge 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 secured to the casing 2 by means of the screws 8, ensures the axial maintenance of the charge 3 , thus reducing the stresses in the coating 4.
- the coating is in fact subjected only to its own inertial forces which can be balanced by bonding the coating to the support 5 (at the level of the surface 9) and to the load 3.
- the support 5 will be dimensioned so that it performs its function of axially maintaining the explosive charge.
- the metal support is preferably made, for example from a light alloy such as an aluminum alloy.
- 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 coating. It 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 the latter according to the thickness of the coating and its deformation characteristics.
- the support therefore also makes it possible to improve the formation of the core skirt generated by the coating.
- FIG. 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 level 9 and glued to the load 3 and it is subjected essentially to its own inertial forces.
- FIG. 3 shows a third embodiment of the invention in which the support 5 is no longer annular but takes the form of a cup applied to the explosive charge 3 and carrying a housing 11 intended to receive the coating 4.
- the support / cup 5 has a cylindrical surface 5a having a diameter equal to the internal diameter of the envelope 2.
- the means for connecting the support 5 to the envelope 2 comprise a deformable washer 12 which is disposed between an annular face 13 of the support 5 and a nut 14 screwed to the end of the envelope 2.
- the nut 14 thus constitutes a bearing surface integral with the casing 2.
- the internal diameters D1 of the washer 12 and D2 of the nut 14 are chosen to be greater than the external diameter of the coating 4, so there is no obstacle placed in front of the coating and capable of disturbing the formation of the core.
- the washer 12 is shown in more detail in Figures 4a and 4b. It is made of pressed spring steel sheet and it has spring tongues 15 (here four tongues), regularly angularly distributed, and which are supported on the annular face 13 of the support 5.
- These spring tabs 15 have here the form of arcs of circles concentric with the washer 12 and they are obtained by cutting the washer.
- the washer 12 is deformable in compression and it makes it possible to make up for the axial clearances between the explosive charge 3 (carrying the support 5) and the casing 2, mainly the clearances due to differential thermal expansion.
- the washer ensures (with the support 5) the axial maintenance of the load 3 relative to the envelope 2 of the load.
- the tongues 15 bring the coating and the load into contact with the bottom of the load via the cup (initial position of the load).
- the advantage of this embodiment is that it ensures excellent mechanical resistance to the acceleration of ejection of the charge while allowing thermal expansion in a very reliable and reproducible manner.
- the support 5 will be dimensioned as a function of the amplitude of the acceleration forces undergone.
- the washer 12 must therefore be defined so that the tongues come to bear on the support and have an orientation such that 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 the coating. When loading is initiated, it transmits the shock it receives from the explosive to the coating.
- the part of the cup 5 disposed between the explosive and the coating 4 will be given a thickness which will be chosen so as to promote the formation of the core while ensuring mechanical resistance to the stresses encountered during ejection.
- a metallic material will be chosen whose impact impedance is lower than that of the coating.
- the support / cup 5 makes it possible to reduce the influence of a gas leak at the periphery of the coating at the time of initiation of the explosive.
- the elastic washer 22 may be replaced by a compressible elastomer washer.
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9513378 | 1995-11-13 | ||
FR9513378A FR2741142B1 (fr) | 1995-11-13 | 1995-11-13 | Charge generatrice de noyau ayant une tenue a l'acceleration amelioree |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0773424A1 true EP0773424A1 (de) | 1997-05-14 |
EP0773424B1 EP0773424B1 (de) | 2000-09-20 |
Family
ID=9484474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960402311 Expired - Lifetime EP0773424B1 (de) | 1995-11-13 | 1996-10-30 | Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0773424B1 (de) |
DE (1) | DE69610395T2 (de) |
FR (1) | FR2741142B1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1363102A2 (de) * | 2002-05-16 | 2003-11-19 | Diehl Munitionssysteme GmbH & Co. KG | Gefechtskopf |
GB2584361B (en) * | 2019-05-25 | 2023-02-01 | Alford Ip Ltd | Improvements in or relating to explosive charges |
Families Citing this family (4)
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 |
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 |
WO2016161376A1 (en) * | 2015-04-02 | 2016-10-06 | Hunting Titan, Inc. | Snap-on liner retention device |
DE102022003744A1 (de) | 2022-10-12 | 2024-04-18 | Diehl Defence Gmbh & Co. Kg | Feinabstimmung eines explosiv geformten Projektils |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2086531A5 (en) * | 1970-04-01 | 1971-12-31 | Clausin Pierre | Plate charges - insulating screen |
DE2046372A1 (en) * | 1970-09-19 | 1972-03-23 | Dynamit Nobel Ag, 5210 Troisdorf | Hollow charge - with conical shaper kept in charge contact by springs and adhesive intermediate layer |
DE2807309C1 (de) * | 1978-02-21 | 1987-07-23 | Messerschmitt Boelkow Blohm | Sprengladung mit stachel- oder projektilbildenden Belegungen |
FR2627580A1 (fr) | 1988-02-18 | 1989-08-25 | 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 |
EP0543072A1 (de) * | 1991-07-01 | 1993-05-26 | Bofors AB | Projektilbildende explosive Ladung |
-
1995
- 1995-11-13 FR FR9513378A patent/FR2741142B1/fr not_active Expired - Fee Related
-
1996
- 1996-10-30 EP EP19960402311 patent/EP0773424B1/de not_active Expired - Lifetime
- 1996-10-30 DE DE1996610395 patent/DE69610395T2/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2086531A5 (en) * | 1970-04-01 | 1971-12-31 | Clausin Pierre | Plate charges - insulating screen |
DE2046372A1 (en) * | 1970-09-19 | 1972-03-23 | Dynamit Nobel Ag, 5210 Troisdorf | Hollow charge - with conical shaper kept in charge contact by springs and adhesive intermediate layer |
DE2807309C1 (de) * | 1978-02-21 | 1987-07-23 | Messerschmitt Boelkow Blohm | Sprengladung mit stachel- oder projektilbildenden Belegungen |
FR2627580A1 (fr) | 1988-02-18 | 1989-08-25 | 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 |
EP0543072A1 (de) * | 1991-07-01 | 1993-05-26 | Bofors AB | Projektilbildende explosive Ladung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1363102A2 (de) * | 2002-05-16 | 2003-11-19 | Diehl Munitionssysteme GmbH & Co. KG | Gefechtskopf |
EP1363102A3 (de) * | 2002-05-16 | 2004-10-20 | Diehl Munitionssysteme GmbH & Co. KG | Gefechtskopf |
GB2584361B (en) * | 2019-05-25 | 2023-02-01 | Alford Ip Ltd | Improvements in or relating to explosive charges |
Also Published As
Publication number | Publication date |
---|---|
DE69610395D1 (de) | 2000-10-26 |
EP0773424B1 (de) | 2000-09-20 |
DE69610395T2 (de) | 2001-03-08 |
FR2741142A1 (fr) | 1997-05-16 |
FR2741142B1 (fr) | 1998-01-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1225322B1 (de) | Vorrichtung zum Zentrieren eines Rohres in einer Turbinenwelle | |
EP0773424B1 (de) | Hohlladungsgefechtskopf mit verbesserter Beschleunigungsfestigkeit | |
EP0722542B1 (de) | Schwimmsattel- scheibenbremse und stift dafür | |
EP0806581A1 (de) | Kupplungsausrücklager mit einem elastischen Ring | |
EP0454545A1 (de) | Vorrichtung zur zeitlich begrenzten mechanischen Ankuppelung sowie zur raschen Trennung eines an einem Träger befestigten abstossbaren Gegenstandes | |
EP0857938B1 (de) | Hohlladung mit Verbindungsmittel zwischen der Anlage und der Hülle | |
WO1987007006A1 (fr) | Dispositif de separation pyrotechnique de deux elements | |
EP0891496B1 (de) | Übertragungsgelenkkreuz und entsprechendes übertragungsgelenk | |
EP0594482B1 (de) | Treibladungsbehälter | |
EP0471617B1 (de) | Dichtungsband für Pfeilgeschoss | |
WO1994020813A1 (fr) | Munition de type telescopee | |
EP0773423A1 (de) | Hohlladung mit Auskleidungsbefestigungsmitteln | |
EP0636810A1 (de) | Verbesserung an den Gegenschwingungslagern von Hubschrauberrotorflügeln, und Hubschrauberrotor mit solchen Lagern | |
EP0773425B1 (de) | Auskleidungsbefestigungsmittel für eine Hohlladung | |
FR2790521A1 (fr) | Mecanisme de transmission de couple pour compresseur utilisant une bague elastique pour son assemblage | |
EP0633988B1 (de) | Wärmeschutzvorrichtung | |
EP0395456B1 (de) | Verbindungsvorrichtung zwischen zwei Teilstücken eines drallstabilisierten Geschosses | |
EP0242297B1 (de) | Aktiver Organträgerzusammenbau auf einer Kraftfahrzeugradfelge, Dichtung und aktive Organträger für diesen Zusammenbau | |
FR2877994A1 (fr) | Support de palier, et moteur d'aeronef equipe d'un tel support de palier. | |
FR2778736A1 (fr) | Dispositif de fixation pour un miroir de volee | |
FR2817955A1 (fr) | Dispositif d'amorcage pour charge explosive et charge formee incorporant un tel dispositif d'amorcage | |
FR2869965A1 (fr) | Ensemble de roulement et joint homocinetique correspondant | |
FR2702554A1 (fr) | Munition, en particulier pour arme de gros calibre. | |
EP0775887A1 (de) | Haltevorrichtung für die Beutel einer explosiven Ladung | |
EP0977005A1 (de) | Anzündvorrichtung für ein explosives Geschoss |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE GB SE |
|
17P | Request for examination filed |
Effective date: 19970611 |
|
17Q | First examination report despatched |
Effective date: 19990305 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19990305 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE GB SE |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: VIVES, MICHEL Inventor name: KERDRAON, ALAIN |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20000921 |
|
REF | Corresponds to: |
Ref document number: 69610395 Country of ref document: DE Date of ref document: 20001026 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20040924 Year of fee payment: 9 Ref country code: DE Payment date: 20040924 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20040929 Year of fee payment: 9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051030 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060503 |
|
EUG | Se: european patent has lapsed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20051030 |