EP3645961A1 - Charge formée - Google Patents
Charge forméeInfo
- Publication number
- EP3645961A1 EP3645961A1 EP18742412.2A EP18742412A EP3645961A1 EP 3645961 A1 EP3645961 A1 EP 3645961A1 EP 18742412 A EP18742412 A EP 18742412A EP 3645961 A1 EP3645961 A1 EP 3645961A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- casing
- charge
- coating
- axis
- 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
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000002360 explosive Substances 0.000 claims abstract description 26
- 125000006850 spacer group Chemical group 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 7
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
-
- 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
- F42B1/036—Manufacturing processes therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/001—Devices or processes for assembling ammunition, cartridges or cartridge elements from parts
Definitions
- the technical field of the invention is that of formed charges, that is to say charges comprising an explosive charge disposed in an envelope and a coating applied to the load.
- the charges formed are generally designed to be placed in a well-defined geometry envelope. Most often the explosive charge is poured inside the envelope and the coating is glued on a front face of the explosive charge.
- the patent FR2669721 also proposes means for compensating thermal expansion between the explosive charge and the envelope. These means comprise an annular filling of a compressible material (for example a polysiloxane elastomer) which is interposed between the envelope of the formed charge and the explosive charge.
- a compressible material for example a polysiloxane elastomer
- patent EP1363103 describes a shaped charge in which the coating is secured to the load casing by shims which are moved radially by tightening screws, so as to come against a surface of internal support of the envelope.
- Such a solution has the advantage of allowing a simple and reliable connection of the envelope and the load while allowing adaptation to an envelope having a different internal diameter.
- it has the disadvantage of imposing multiple tightenings in radial directions which can be difficult to achieve (especially for reduced explosive loading diameters - for example less than 155 mm) and most often requires the definition of means of specific tightening.
- the clamping tool can interfere with the coating and degrade it. It is therefore difficult to ensure the necessary tightening torque for each screw.
- the charge formed according to the invention comprises securing means of the envelope and the explosive charge carrying the coating which are simple and reliable and which facilitate the mounting operation.
- the subject of the invention is a shaped filler comprising an explosive charge disposed in an envelope, a coating applied to the filler, and means ensuring the fastening of the envelope and the load carrying the coating, securing means comprising a ring having an abutment surface for the coating, shaped filler comprising at least two shims each covering an angular sector, shims moving radially relative to the ring by the action of a clamping means, to come to bear against a surface of internal support of the casing, the clamping means comprising at least one screw for each shim, screw cooperating with a thread formed in the ring and whose end pushes the shim during screwing of the screw, formed load characterized in that than :
- said shims are positioned axially with respect to the ring by at least one radial axis which is engaged in a radial bore of the ring and which is housed in a radial hole of said shims, said shims being able to slide on the axis, -
- the tapping of the clamping screw or screws further having its axis parallel to the axis of the casing, the screw having a conical end cooperating with a conical bore of said shims, an axial displacement of the screw during its screwing leading to a radial displacement of said wedges.
- the load comprises, for each shim, a positioning axis disposed at a center plane of the shim and two clamping screws arranged symmetrically on either side of the positioning axis. .
- Each shim may advantageously comprise a conical outer profile intended to cooperate with an inner surface of the casing forming a conical bearing to ensure the axial retention of the explosive charge relative to the envelope.
- the ring may comprise an outer cylindrical profile for guiding the ring relative to the envelope.
- the ring may also include an internal cylindrical surface surrounding an outer edge of the coating.
- the load may include a spring washer interposed between the coating and the abutment surface of the ring.
- the load may comprise four shims regularly distributed angularly.
- the shims may not cover the entire external profile of the ring and be separated by grooves.
- the load may comprise an annular space between the explosive charge and the envelope, a space filled with a compressible material.
- FIG. 1 is a simplified longitudinal sectional view of a load formed according to one embodiment of the invention, the section is made at the plane whose trace BB is marked in Figure 2;
- FIG. 2 is a cross-sectional view of this shaped charge, made at the level of the plane whose track AA is marked in FIG. 1;
- FIG. 3a is an enlarged detail view of the securing means, sectional view taken at a radial positioning axis of a shim, cutting plane whose trace BB is marked in Figure 2;
- a formed charge 1 according to the invention comprises an explosive charge 2 which is disposed in a generally cylindrical casing 3 of axis 7, and also a coating 4, of a ductile material such as copper, which is applied to the loading 2.
- the rear part of the casing 3 carries a closing cap 21 which receives priming means, for example a detonator 22 and a relay 23. These means do not form part of the invention and are therefore represented very schematically. . Also included at the base of the explosive charge 2 is a detonation wave shaping screen 14.
- This warhead 1 also comprises means for securing the envelope 3 and the load 2 carrying the coating 4.
- These securing means comprise a ring 5 having a stop surface 5a for the coating and shims 6 which each cover an angular sector. There are four wedges 6 regularly distributed angularly (see Figure 2).
- the shims 6 can move radially with respect to the ring 5 by the action of a clamping means, to come to bear against an internal bearing surface of the casing 3.
- each shim 6 has a conical outer profile 6a which is intended to cooperate with an inner surface 3a of the casing 3 which forms a conical support (see Figure 3a).
- the shims 6 a non-conical outer profile so as to adapt the invention to different geometries of envelopes 3. If the casing 3 is devoid of a conical bearing surface 3a, it will be possible to give the shims 6 a cylindrical external profile having a knurling or indentations in order to ensure, during the clamping of the shims 6, the attachment of the latter on the inner surface of the casing 6. the envelope 3, thus blocking the explosive charge relative to the envelope.
- each shim 6 is positioned axially with respect to the ring 5 by at least one radial axis 8 which is engaged in a radial bore 9 of the ring 5 and which is housed in a radial hole 10 of the 6.
- the wedge 6 can slide on the axis 8 to approach the envelope 3.
- each shim 6 there is a single positioning axis 8 on each shim 6, which axis is disposed at a center plane of the shim 6 (see Figure 2).
- the axis 8 may comprise a threaded rear part which will be engaged in a tapping of the ring 5 and a smooth front part which will receive the shim 6.
- each shim 6 comprises at least one screw 11 for each shim, here two screws 11 arranged symmetrically on either side of the positioning axis 8 (see FIG. 2), and each screw of tightening 11 cooperates with a tapping 12 arranged in the ring 5 (see Figure 3b).
- the tapping 12 of the clamping screws 11 has its axis parallel to the axis 7 of the casing 3 and the screw 11 has a conical end 11a which cooperates with a conical bore 6b of the shim 6 (see FIG. Figure 3b).
- the ring 5 has an external cylindrical profile 19 guiding the ring 5 relative to the casing 3.
- a seal (not shown) may be positioned in a groove 24 at the outer cylindrical profile 19.
- the ring 5 has an internal cylindrical bearing surface 15 which surrounds an external rim of the coating 4.
- the ring 5 is positioned precisely with respect to the coating 4 and the explosive charge 2.
- the ring 5 has at its lower part an outer conical bearing surface 16 which is opposite an internal conical profile 17 which is complementary thereto and which is carried by the shim 6.
- the ring 5 finally has a peripheral groove 18
- the ring 5 carrying the four shims 6 can therefore be introduced without difficulty inside the casing 3.
- the shims 6 are separated by axial grooves 25. These grooves facilitate the passage of electrical son between the front part of the load and its rear part. This facilitates the connection between a firing control rocket load and the ignition means.
- an annular space 20 is arranged between the explosive charge 2 and the envelope 3.
- This space may be filled with a compressible material (not shown) for example a polyurethane foam tube.
- a compressible material for example a polyurethane foam tube.
- the wedging provides protection of the load against impacts and it also allows radial expansion of the explosive charge 2.
- the compressible material may also be an elastomer injected into the annular space as described by the patent FR2669721.
- An elastomer injected into the annular space may also fill the grooves 25 and all the spaces between the shims 6 and the ring 5. This completes the setting of the entire assembly.
- the injection of the material will be through holes 26 made in the coating 4 or holes in the closure cover 21.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Light Receiving Elements (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1700705A FR3068456B1 (fr) | 2017-06-28 | 2017-06-28 | Charge formee |
PCT/EP2018/066983 WO2019002219A1 (fr) | 2017-06-28 | 2018-06-25 | Charge formée |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3645961A1 true EP3645961A1 (fr) | 2020-05-06 |
EP3645961B1 EP3645961B1 (fr) | 2021-06-02 |
Family
ID=60765645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18742412.2A Active EP3645961B1 (fr) | 2017-06-28 | 2018-06-25 | Charge formée |
Country Status (5)
Country | Link |
---|---|
US (1) | US10782106B2 (fr) |
EP (1) | EP3645961B1 (fr) |
AU (1) | AU2018293145B2 (fr) |
FR (1) | FR3068456B1 (fr) |
WO (1) | WO2019002219A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2723781C1 (ru) * | 2019-09-17 | 2020-06-17 | Акционерное общество "Конструкторское бюро приборостроения им. академика А.Г. Шипунова" | Кумулятивная боевая часть |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3941245A1 (de) * | 1989-12-14 | 1991-06-20 | Rheinmetall Gmbh | Gefechtskopf |
FR2669721B1 (fr) * | 1990-11-28 | 1993-01-08 | Commissariat Energie Atomique | Charge creuse. |
SE501121C2 (sv) * | 1992-01-29 | 1994-11-21 | Bofors Ab | Ammunition |
US5522319A (en) * | 1994-07-05 | 1996-06-04 | The United States Of America As Represented By The United States Department Of Energy | Free form hemispherical shaped charge |
FR2741144B1 (fr) * | 1995-11-13 | 1998-01-02 | Giat Ind Sa | Charge formee comportant des moyens de maintien du revetement |
FR2759158B1 (fr) * | 1997-02-06 | 1999-02-26 | Giat Ind Sa | Charge generatrice de noyau comportant des moyens de liaison du revetement et de l'enveloppe |
FR2837999B1 (fr) * | 2002-03-27 | 2005-05-20 | St Microelectronics Sa | Procede et dispositif de controle du fonctionnement d'un transistor bipolaire fonctionnant en classe a selon un montage emetteur commun ou base commune |
FR2839777B1 (fr) * | 2002-05-16 | 2004-07-02 | Giat Ind Sa | Charge formee et procede de montage d'une telle charge formee |
DE10221759B4 (de) * | 2002-05-16 | 2005-03-31 | Diehl Munitionssysteme Gmbh & Co. Kg | Gefechtskopf |
SE524299C2 (sv) * | 2003-03-26 | 2004-07-20 | Saab Ab | Verkansdel |
-
2017
- 2017-06-28 FR FR1700705A patent/FR3068456B1/fr active Active
-
2018
- 2018-06-25 US US16/627,512 patent/US10782106B2/en active Active
- 2018-06-25 WO PCT/EP2018/066983 patent/WO2019002219A1/fr unknown
- 2018-06-25 EP EP18742412.2A patent/EP3645961B1/fr active Active
- 2018-06-25 AU AU2018293145A patent/AU2018293145B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
AU2018293145A1 (en) | 2020-01-30 |
WO2019002219A1 (fr) | 2019-01-03 |
FR3068456A1 (fr) | 2019-01-04 |
US10782106B2 (en) | 2020-09-22 |
AU2018293145B2 (en) | 2023-11-02 |
FR3068456B1 (fr) | 2019-07-19 |
US20200158479A1 (en) | 2020-05-21 |
EP3645961B1 (fr) | 2021-06-02 |
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