IL153617A - Device to enable targets to be combated by a shaped charge function - Google Patents

Device to enable targets to be combated by a shaped charge function

Info

Publication number
IL153617A
IL153617A IL153617A IL15361702A IL153617A IL 153617 A IL153617 A IL 153617A IL 153617 A IL153617 A IL 153617A IL 15361702 A IL15361702 A IL 15361702A IL 153617 A IL153617 A IL 153617A
Authority
IL
Israel
Prior art keywords
modular
shaped charge
ammunition unit
charge
liner
Prior art date
Application number
IL153617A
Inventor
Torsten Ronn
Nils Johansson
Original Assignee
Torsten Ronn
Nils Johansson
Bae Systems Bofors Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Torsten Ronn, Nils Johansson, Bae Systems Bofors Ab filed Critical Torsten Ronn
Publication of IL153617A publication Critical patent/IL153617A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02Shaped or hollow charges
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F42B12/16Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge in combination with an additional projectile or charge, acting successively on the target
    • F42B12/18Hollow charges in tandem arrangement

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Manipulator (AREA)

Description

53617/2 NABLE TARGETS TO BE COMBATED BY A SHAPED CHARGE FUNCTION Pearl Cohen Zedek Latzer Advocates, Patent Attorneys & Notaries P-5575-IL A device to enable targets to be combated by a shaped charge function The present invention relates to a device to enable the engagement of targets using a shaped charge function.
The use of a unit of ammunition in the form of a projectile, shell, missile, etc to engage a target by the apphcation of a shaped charge function is already known. The shaped charge is thus matched to the type of target, and there are thereby shaped charges arranged to operate at short standoff distances to the target or surface of the target, compared with a so-called jettmg shaped charge function that operates at a very small standoff distance (e.g. 100 millimetres) from the surface of the target to achieve a hole in, or an impact on, the target. The use of EFP (explosively formed projectile/penetrator) shaped charges with which one can begin to attack a target or surface of a target at considerably larger standoff distances (e.g. 50 metres) is also already known. Consequently, there are major differences in effectiveness against different types of target, and to optimise effect in each case it is vital to use the correct ammunition unit with the correct shaped charge. The use of different ammunition units optimised for different engagement situations is thereby already known.
There is a need, however, to be able to reduce the assortment of ammunition units. The objective of the present invention is to resolve this problem, and to propose that modular charge components be used to enable one and the same ammunition unit to be matched to, or be re-configured for, the type of target in question, i.e. so that the ammunition unit can be assigned a shaped charge function at the deployment site (e.g. prior to firing, launch or weapon release) that is optimised for the target to be engaged on the occasion in question. It is thus necessary that re-configuration for the various engagement occasions can achieve optimisation for the target in question, and that it can be performed in a safe and, primarily, technically simple manner. There is even a desire that the new function with modular charges shall not unduly intrude upon the total costs in the system as such. The present invention is envisaged to resolve this problem too.
The main characteristic features of the arrangement initially mentioned are, among other things, that an ammunition unit in the form of a projectile, shell, missile, etc is arranged to operate with at least two modular charge configurations, in the first of which the ammunition unit incorporates a first modular charge or modular array that projects a first shaped charge function— such as a jetting shaped charge— while in the second configuration the first modular charge or modular array is conjoined with a second modular charge or modular array that projects a second shaped charge function such as an EFP function. Another feature is that the ammunition unit is arranged to enable changeover from the first configuration to the second before firing, launch or release of the ammunition unit.
Thus in embodiments of the invention concept the second modular charge or modular array eliminates the shaped charge function effected by the first modular charge or modular array when the modules or arrays are arranged in conjoined mode. The first modular charge incorporates a liner— forwards facing and in the form of a funnel or cone — that produces the first shaped charge function. The second modular charge is thus designed with a rear section that exhibits a corresponding form to that of the said funnel or cone form. In the second case the second modular charge is conjoined with the first modular charge via the said rear section which, in conjoined mode, is inserted in the funnel or cone form of the first modular charge. In a preferred embodiment the fit between the form of the rear section of the second modular charge and the funnel or cone form of the first modular charge is a salient feature, and exhibits an extremely precise fit in the preferred embodiment.
The liner that produces the second shaped charge function exhibits a lateral face that conjoins with the lateral face of the first modular charge, and the first mentioned lateral face can be considered to form a continuation or constituent part of the latter mentioned lateral face. The said rear section preferably consists of or contains explosive material, and the first modular charge preferably incorporates an essentially cylindrical container enclosing the explosive material of the first modular charge. Parts of the explosive material in the first and second modular charges conjoin with each other in the said conjoined mode. In a preferred embodiment the animunition unit at delivery incorporates both modular charges or modular arrays in conjoined state. If the first charge configuration shall be used the second modular charge or modular array is thus removed. The ammunition device in one embodiment is arranged with a casing or structural element that is removable when changing over between the first and second configuration modes. After the changeover it shall be possible to refit the said casing or structural element to enable the ammunition unit to be fired, launched or released. Additional variants of the present invention are disclosed in the subsequent Patent Claims and the detailed description.
The above proposals enable the new changeover function to be achieved without any significant financial burden to the system in its entirety. The present invention exploits the insight that the explosive charge represents a relatively small value with regard to the total system, in which the functions for guidance, propulsion, actuation, etc represent the major costs. The redundancy thereby achieved by the use of two different types of modular charges or modular arrays in which one modular charge or modular array is discarded in certain engagement situations is thus not a burden to the system as such. Changeover can be arranged in. an already known way, such as by means of screw joint(s), by means of which the casing or structural element can be removed and then refitted to achieve reliable closure. The modular charges as such can also consist of conventional constructions and designs.
A currently proposed design for a device as claimed in the present invention is described below with reference to the appended Figures 1 and 2 in which Figure 1 shows a longitudinal section of a modular charge configuration- comprising first and second modular charges in conjoined mode, and 15361 7/2 4 Figure 2 shows a longitudinal section of the modular charges i l l ustrated in Figure 1 , but with tile second modular charge removed from the first modular charge.
Number 1 in Figure 1 symbol ises parts of an ammunition un it in accordance with the above. The ammunition unit comprises, among other things, an explosive charge arrangement denoted 2. The explosive charge arrangement incorporates an initiation function symbolised by 3'. As claimed in the present invention the explosive charge arrangement comprises two modular charges, of which the first modu lar charge i s designated 3 and the second modular charge is designated 4. Modular charge 3 comprises explosive 3a and a trumpet formed, shaped charge effecting inner cone illustrated in Figure 1 by cone sections 3b and 3c. This inner cone sections 3b, 3c extend from the frontal part 3d of the modular charge 3 inwards towards the central part of the modular charge. Sections 3b, 3c show the curvature of the inner cone, and that it forms a funnel shaped space. Sections 3b and 3c can exhibit other curvatures or extensions and, for example, may be essential ly cone shaped. The second modular charge 4 comprises a rear section 4a comprising or consisting of explosive. The second modular charge also comprises a frontally concave frontal liner 4b that effects shaped charge function. The rear section 4a thus exhibits a form that conjoins with wal ls of the space formed between sections 3b, 3c. As claimed in the present invention the fit between the outer surface 4a' of the rear section and the inner surfaces 3c' and 3b' is very precise.
Sections 3b, 3c are also arranged so that the first modular charge can effect a jetting shaped charge function when in a mode separated from the second modular charge. In the conjoined mode for modular charges 3 and 4 il lustrated in Figure 1 the explosive charge arrangement operates with a shaped charge function effected by liner 4b. The latter function in the embodiment example constitutes an EFP (explosively formed projectile) shaped charge function. The explosive charge arrangement 2 can thus function for a large standoff distance A to a target 5 that is to be engaged using the shaped charge function in q uestion, and the resultant explosively formed projectile 6 will attack the target 5 in a concentrated zone 5a. The standoff distance A may be, for example, 50 metres. 1 53617/2 In Figure 2 the second modular charge 4 has been separated from modular charge 3. The space in the funnel shaped part bounded by sections 3 b, 3c is designated 3e. Figure 2 shows the shape of the rear section 4a of modular charge 4 and its matching 5 shape in relation to space 3e. The shape of surfaces 3c' and 4a' is also illustrated. In this embodiment modular charge 4 is not used and is discarded. Modular charge 3 thus operates independently from modular charge 4, and can effect its shaped charge function which is of said jetting type. Consequently, the ammunition unit or explosive charge arrangement 2 can in this case be used to engage a target 5 that is at standoff distance A' when ammunition unit 1 is triggered, standoff di stance A' being relatively small — e.g. 1 00 m il limetres — in relation to standoff distance A. The shaped charge jet projected by modular charge 3 is designated 6'. In Figure 2 a screw joint on the casing of the device is symbolised by 7. The screw joint can comprise an internal and external thread of already known type. The casing or structural element la can thereby be temporari ly separated from the casing or structural element lb. The ammun ition un it is suppl ied with the explosive charge arrangement in conjoined mode as illustrated in Figure 1 . For a possible changeover to the mode i llustrated in Figure 2 the casing or structural element la is thus unscrewed to enable modular charge 4 to be removed, after which the casing or structural element la is screwed back onto casing or structural element lb.
It is envisaged in accordance with the above that modular charge 3 in principle can comprise a number of first modules, explosive compositions and other configurations, and that in such cases reference is made to a first modular array. In a corresponding way the second modular charge 4 can consist of more than one module, whereby such an arrangement can be envisaged as a second modular array. As claimed in the present invention the first modular charge can interact with a second modular array, and the second modular charge can interact with a first modular array. Figure 2 also shows that the rear section 4a exhibits a rear plane 4a" that is circular and extends at right angles to the plane of the figure i l lustrated. In the conjoined mode illustrated in Figure 1 this end plane 4a" butts against an inner surface 3a' in the charge 3a sections of the first modular charge. Thus in conjoined mode there is mechanical contact between charge sections 4a and 3a.
Liner 4b on the second modular charge 4 exhibits a lateral face 4b'. This lateral face extends adjacent to an outer surface 3f of the casing or structural element of the first modular charge. Lateral face 4b' can be considered to constitute a continuation of outer surface 3f. The first modular charge in principle comprises a casing that encases the explosive 3a, with the said initiating device 3' arranged at the rear of the said casing. Rear section 4a consists of a self-supporting explosive charge.
The present invention is not limited to the design examples described above, but can be subjected to modifications within the framework of the subsequent Patent Claims and the invention concept.

Claims (18)

153617/2
1 . A modular ammunition unit comprising: a first modular shaped charge having a first liner on a forward portion of the first shaped charge, wherein the first liner has a funnel or cone shape; a structural element housing at least a part of the first modular shaped charge; and a second modular shaped charge having a concave frontal second liner, wherein a rear section of the second shaped charge has a funnel or cone shape that is a complementary fit with first liner so that the rear section of the second shaped charge can be inserted into the first liner, wherein the second modular shaped charge is removably engageable with the ammunition unit to enable firing of the ammunition unit in at least two modes.
2. The modular ammunition unit of claim 1 , wherein the ammunition unit operates in a first mode when the second modular shaped charge is not fitted in the first modular shaped charge and in a second mode when the second modular shaped charge is fitted in the first modular shaped charge.
3. The modular ammunition unit of claim 2, wherein: the first modular shaped charge is arranged to engage a target at a first standoff distance when the ammunition unit is in the first mode; and the ammunition unit is arranged to engage a target at a second standoff distance when the ammunition unit is in the second mode, wherein the second standoff distance is larger than the first standoff distance.
4. The modular ammunition unit of claim 3, wherein the second standoff distance is about 50 meters.
5. The modular ammunition unit of claim 3, wherein a rear section of the first modular shaped charge is essentially cylindrical.
6. The modular ammunition unit of claim 3, wherein the rear section of the second modular shaped charge is in direct contact with the first modular shaped charge when the ammunition unit is in the second mode. 153617/2
7. The modular ammunition unit of claim 3, wherein part of the structural element is removable in order to change the ammunition unit from the second mode to the first mode.
8. The modular ammunition unit of claim 7, wherein the structural element comnprises: a first structural element; and a second structural element connected to the first structural element by a hinge.
9. The modular ammunition unit of claim 3, wherein in explosive charge of the first modular shaped charge comprises a plurality of initiation points that enable operation of the ammunition unit to effect a jet, a knife blade and a cruciform shaped projectile and a fragmentation warhead effect.
10. The modular ammunition unit of claim 3, wherein the first modular shaped charge is a modular array.
1 1. The modular ammunition unit of claim 3, wherein the second modular shaped charge is a modular array.
12. The modular ammunition unit of claim 3, wherein a front portion of the first liner contacts a rear portion of the second liner.
13. A modular ammunition unit comprising: a first modular shaped charge having an essentially cylindrical rear section and first liner on a forward portion of the first modular shaped charge, wherein the first liner has a funnel or cone shape; a structural element housing at least a part of the first modular shaped charge; and a second modular shaped charge having a concave frontal second liner, wherein a rear section of the second shaped charge has a funnel or cone shape that is complementary fit with first liner so that the rear section of the second shaped charge can be inserted into the first liner, wherein the second modular shaped charge is removably engageable with the ammunition unit to enable firing of the ammunition unit in at least two modes, the ammunition unit operating in a first mode when the second modular shaped charge is not fitted in 1 5361 7/2 the first modular shaped charge and in a second mode when the second modular shaped charge is fitted in the first modular shaped charge, the first modular shaped charge is arranged to engage a target at a first standoff distance when the ammunition unit is in the first mode and arranged to engage a target at a second standoff distance when the ammunition unit is in the second mode, wherein the second standoff distance is larger than the first standoff distance, the rear section of the second modular shaped charge is in direct contact with the first modular shaped charge when the ammunition unit is in the second mode, and part of the structural element is removable in order to change the ammunition unit from the second mode to the first mode.
14. The modular ammunition unit of claim 13, wherein the second standoff distance is about 50 meters.
15. The modular ammunition unit of claim 13, wherein an explosive charge of the first modular shaped charge comprises a plurality of initiation points that enable operation of the ammunition unit to effect a jet, a knife blade and a cruciform shaped projectile and a fragmentation warhead effect.
16. The modular ammunition unit of claim 13, wherein the first modular charge is a modular array.
17. The modular ammunition unit of claim 13, wherein the second modular charge is a modular array.
18. The modular ammunition unit of claim 13, wherein a front portion of the first liner contacts a rear portion of the second liner. For the Applicant
IL153617A 2000-07-03 2002-12-24 Device to enable targets to be combated by a shaped charge function IL153617A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0002483A SE519763C2 (en) 2000-07-03 2000-07-03 Arrangements to meet combatability of targets with function with directed blasting effect
PCT/SE2001/001406 WO2002003010A1 (en) 2000-07-03 2001-06-20 A device to enable targets to be combated by a shaped charge function

Publications (1)

Publication Number Publication Date
IL153617A true IL153617A (en) 2008-07-08

Family

ID=20280331

Family Applications (2)

Application Number Title Priority Date Filing Date
IL15361701A IL153617A0 (en) 2000-07-03 2001-06-20 A device to enable targets to be combated by a shaped charge function
IL153617A IL153617A (en) 2000-07-03 2002-12-24 Device to enable targets to be combated by a shaped charge function

Family Applications Before (1)

Application Number Title Priority Date Filing Date
IL15361701A IL153617A0 (en) 2000-07-03 2001-06-20 A device to enable targets to be combated by a shaped charge function

Country Status (6)

Country Link
EP (1) EP1297294B1 (en)
AU (1) AU2001266479A1 (en)
IL (2) IL153617A0 (en)
SE (1) SE519763C2 (en)
WO (1) WO2002003010A1 (en)
ZA (1) ZA200210374B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE526920C2 (en) 2003-06-04 2005-11-15 Bofors Defence Ab Explosion kit with at least two inserts / liners
GB0425203D0 (en) * 2004-11-16 2004-12-15 Qinetiq Ltd Improvements in and relating to oil well perforators
US9301845B2 (en) 2005-06-15 2016-04-05 P Tech, Llc Implant for knee replacement
EP1832838B1 (en) * 2006-03-09 2015-07-08 Saab AB A method for reducing the amount of ammunition types to be used and an ammunition device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH293438A (en) * 1951-02-06 1953-09-30 Rochat Jean Explosive device with a directed explosive effect.
DE1128345B (en) 1960-03-05 1962-04-19 Boelkow Entwicklungen Kg Hollow explosive charge
DE3501649A1 (en) * 1985-01-19 1986-07-24 Diehl GmbH & Co, 8500 Nürnberg COMBAT HEAD WITH RADIATING TAPERED CONE INLAY
DE3609865C1 (en) 1986-03-22 1997-07-10 Daimler Benz Aerospace Ag War head, with a wide range of uses
DE3625966A1 (en) * 1986-07-31 1988-02-11 Diehl Gmbh & Co PROJECT-FORMING LOAD
US5509357A (en) * 1995-03-03 1996-04-23 Northrop Grumman Corporation Dual operating mode warhead
US5939663A (en) 1996-02-14 1999-08-17 The United States Of America As Represented By The Secretary Of The Army Method for dispersing a jet from a shaped charge liner via multiple detonators

Also Published As

Publication number Publication date
SE0002483L (en) 2002-01-04
WO2002003010A1 (en) 2002-01-10
ZA200210374B (en) 2004-02-10
SE0002483D0 (en) 2000-07-03
EP1297294B1 (en) 2012-02-15
AU2001266479A1 (en) 2002-01-14
EP1297294A1 (en) 2003-04-02
SE519763C2 (en) 2003-04-08
IL153617A0 (en) 2003-07-06

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