WO2003019101A1 - Shaped demolition charge - Google Patents

Shaped demolition charge Download PDF

Info

Publication number
WO2003019101A1
WO2003019101A1 PCT/SE2002/001504 SE0201504W WO03019101A1 WO 2003019101 A1 WO2003019101 A1 WO 2003019101A1 SE 0201504 W SE0201504 W SE 0201504W WO 03019101 A1 WO03019101 A1 WO 03019101A1
Authority
WO
WIPO (PCT)
Prior art keywords
charge
centre
cutting jet
main
mam
Prior art date
Application number
PCT/SE2002/001504
Other languages
French (fr)
Inventor
Svante Karlsson
Gunnar Arne Rickard Andersson
Jonas Lundgren
Original Assignee
Totalförsvarets Forskningsinstitut
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 Totalförsvarets Forskningsinstitut filed Critical Totalförsvarets Forskningsinstitut
Priority to AT02760967T priority Critical patent/ATE428904T1/en
Priority to DE60231993T priority patent/DE60231993D1/en
Priority to EP02760967A priority patent/EP1427982B1/en
Publication of WO2003019101A1 publication Critical patent/WO2003019101A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0838—Primers or igniters for the initiation or the explosive charge in a warhead
    • F42C19/0842—Arrangements of a multiplicity of primers or detonators, dispersed within a warhead, for multiple mode selection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H11/00—Defence installations; Defence devices
    • F41H11/02—Anti-aircraft or anti-guided missile or anti-torpedo defence installations or systems
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/095—Arrangements of a multiplicity of primers or detonators, dispersed around a warhead, one of the primers or detonators being selected for directional detonation effects

Definitions

  • the present invention relates to a shaped demolition charge that can be switched between a beam-like cutting jet and a line-like cutting jet.
  • a cone charge, m/46 B, is used to produce a beam-like cutting jet. This charge is used for example to make charging hole in concrete or rock.
  • a prism charge, m/47, is used to produce a line-like or flat cutting jet, e.g. to cut of concrete- or steel beams.
  • the invention shows a charge combining beam- and line-like cutting jet in the same charge.
  • the user uses a handle or the like to choose which type of cutting jet the charge shall produce.
  • Figure 1 shows a beam-like shaped demolition charge according to prior art.
  • Figure 2 shows a line-like shaped demolition charge according to prior art.
  • Figure 3 shows a shaped demolition charge according to the invention.
  • Figure 4 shows from above a shaped demolition charge according to the invention.
  • Figure 5 shows a line-like cutting jet charge according to the invention.
  • Figure 6 shows a beam-like cutting jet charge according to the invention.
  • Figure 7 shows a detonation in a line-like cutting jet charge.
  • Figure 8 shows a detonation in a beam-like cutting jet charge.
  • Figure 9 shows a charge with a slide in a line-like cutting jet position.
  • Figure 10 shows a charge with a slide in a beam-like cutting jet position.
  • Figure 1 1 shows a charge with a handle in a line-like cutting jet position.
  • Figure 12 shows a charge with a handle in a beam-like cutting jet position.
  • Figure 13 shows a schematic X-ray picture of a beam-like cutting jet.
  • Figure 13 shows a schematic X-ray picture of a line-like cutting jet.
  • Figure 13 shows a schematic X-ray picture of a line-like cutting jet.
  • Figure 1 and figure 2 show shaped demolition charges according to prior art
  • a cone charge, figure 1 produces a beam-like cutting jet, which can be used to make holes for charges in rock or concrete
  • a prism charge, figure 2 produces a linearly extended flat cutting jet used e g to destroy bridges or cutting of beams
  • FIG 3 shows a preferred embodiment of a shaped demolition charge according to the invention
  • the shaped demolition charge (1) comprises a mam charge (2) with a conical insert (4, figure 5 and 6), an ignition charge (3) with a hole (10) for an igniter, e g a cordtex fuse, a transfer charge (5,6), and a switch, in figure 3 in the form of a slide (7), comprising a centre charge (9, figure 6 and 9)
  • the charge is shown from above without the switch
  • Figure 5 and figure 6 show a cut away demolition charge
  • Figure 5 shows the charge in a position when there is no connection between the ignition charge (3) and the centre of the main charge (2) This prevents the main charge (2) from being ignited in the centre
  • the ignition of the main charge (2) is forced to go through the transfer charge (5,6) and initiate the main charge (2) in two points (25,26) on the periphery of the main charge (2), which means that a line-like cutting jet is produced
  • the demolition charge is shown with the transfer charge (5,6) connected to the periphery of the main charge (2) It is possible to arrange the points (25,26) in a different way, although it is important for the function that the points (25,26) are located symmetrically around the centre of the main charge (2)
  • Figure 7 and 8 show the progress of the detonation in a demolition charge according to the invention
  • the detonation front has reached into the main charge, but from different starting points
  • Figure 7 shows how the detonation front is spreading from two peripheral points
  • figure 8 shows how the detonation front mainly is spreading from the centre of the mam charge (2)
  • the ignition charge (3), transfer charge (5,6), and a part of the mam charge have detonated (20)
  • the detonation will continue in the mam charge and primarily hit the insert (4) from two opposite directions This brings about that the insert collapses across a line and in that way produces a flat cutting jet
  • the centre charge (9) is located between the ignition charge (3) and the mam charge (2)
  • the centre charge (9) and the transfer charge (6,6) are initiated essentially at the same time by the ignition charge (3) Because the centre charge (9) provides a shorter way than the transfer charge (5,6) the detonation front will reach the centre of the main charge before the periphery When the detonation front
  • FIGs 9-13 show two different types of switches who in one simple operation can switch the charge between a beam-like cutting jet (normal cutting jet) and a linelike cutting jet
  • Figures 9 and 10 show a switch in the form of a slid (7), which can be moved between the two shown positions
  • the slid is in the position for line- like cutting jet, owing to that the centre charge (9) is not in connection with the ignition charge (3)
  • the centre charge (9) is in connection with the ignition charge (3) and the centre of the main charge (2) as in figure 6
  • the figures 11 and 12 show a switch in the form of a knob (8), suitably with teeth (11), which may be turned between a position where the centre charge (9) is not in connection with the ignition charge (3) and another where the centre charge (9) is
  • Figure 13 shows a schematic X-ray picture of a cutting jet from a cylindrical charge ignited in the centre.
  • Figure 14 and 15 show in a similar way a line-like cutting jet from a cylindrical charge initiated in two peripheral points.
  • the explosive used in the transfer charges and in the centre charge is preferably a cast, pressed or extruded booster explosive, which makes sure that the main charge is initiated.
  • suitable explosive e.g. an insensitive explosive making the charge shock resistant with IM- features (Insensitive Munition).

Abstract

The present invention relates to a shaped demolition charge that can be switched between a beam-like cutting jet and a line-like cutting jet. Today no charge is known which can be switched in the above-described way. Instead one demolition charge is used for each function. In order to avoid the problem of storing, transporting, and handling two different kinds of charges the invention shows a charge combining beam- and line-like cutting jet in the same charge. The desired function is easily chosen through a switch, e.g. by moving a slide or a knob. The shaped demolition charge (1) comprises a main charge (2), an ignition charge (3), a transfer charge (5, 6) connecting the ignition charge (3) with the main charge (2) in two peripheral points (25, 26) on the main charge (2), and a switch (7, 8), comprising a centre charge (9) which oculd connect the ignition charge (3) to teh centre of the main charge (2) or not.

Description

SHAPED DEMOLITION CHARGE
The present invention relates to a shaped demolition charge that can be switched between a beam-like cutting jet and a line-like cutting jet.
Today no charge is known which can be switched in the above-described way. Instead two different kinds of charges are used in e.g. the Swedish Defence Force. A cone charge, m/46 B, is used to produce a beam-like cutting jet. This charge is used for example to make charging hole in concrete or rock. A prism charge, m/47, is used to produce a line-like or flat cutting jet, e.g. to cut of concrete- or steel beams.
In order to avoid the problem of storing, transporting, and handling two different kinds of charges the invention shows a charge combining beam- and line-like cutting jet in the same charge. According to one embodiment the user uses a handle or the like to choose which type of cutting jet the charge shall produce.
The invention will now be described in more detail with reference to the accompanying drawings.
Figure 1 shows a beam-like shaped demolition charge according to prior art.
Figure 2 shows a line-like shaped demolition charge according to prior art.
Figure 3 shows a shaped demolition charge according to the invention.
Figure 4 shows from above a shaped demolition charge according to the invention.
Figure 5 shows a line-like cutting jet charge according to the invention.
Figure 6 shows a beam-like cutting jet charge according to the invention.
Figure 7 shows a detonation in a line-like cutting jet charge.
Figure 8 shows a detonation in a beam-like cutting jet charge. Figure 9 shows a charge with a slide in a line-like cutting jet position.
Figure 10 shows a charge with a slide in a beam-like cutting jet position.
Figure 1 1 shows a charge with a handle in a line-like cutting jet position.
Figure 12 shows a charge with a handle in a beam-like cutting jet position.
Figure 13 shows a schematic X-ray picture of a beam-like cutting jet. Figure 13 shows a schematic X-ray picture of a line-like cutting jet.
Figure 13 shows a schematic X-ray picture of a line-like cutting jet. Figure 1 and figure 2 show shaped demolition charges according to prior art A cone charge, figure 1 , produces a beam-like cutting jet, which can be used to make holes for charges in rock or concrete A prism charge, figure 2, produces a linearly extended flat cutting jet used e g to destroy bridges or cutting of beams
Figure 3 shows a preferred embodiment of a shaped demolition charge according to the invention The shaped demolition charge (1) comprises a mam charge (2) with a conical insert (4, figure 5 and 6), an ignition charge (3) with a hole (10) for an igniter, e g a cordtex fuse, a transfer charge (5,6), and a switch, in figure 3 in the form of a slide (7), comprising a centre charge (9, figure 6 and 9) In figure 4 the charge is shown from above without the switch
Figure 5 and figure 6 show a cut away demolition charge Figure 5 shows the charge in a position when there is no connection between the ignition charge (3) and the centre of the main charge (2) This prevents the main charge (2) from being ignited in the centre The ignition of the main charge (2) is forced to go through the transfer charge (5,6) and initiate the main charge (2) in two points (25,26) on the periphery of the main charge (2), which means that a line-like cutting jet is produced The demolition charge is shown with the transfer charge (5,6) connected to the periphery of the main charge (2) It is possible to arrange the points (25,26) in a different way, although it is important for the function that the points (25,26) are located symmetrically around the centre of the main charge (2)
In figure 6 the centre charge (9) is shown in a position connecting the ignition charge (3) and the main charge (2) This means that the main charge (2) is ignited in the centre, which results in a normal beam-like cutting jet The transfer charge (5,6) is also ignited at the same time, but since that travel distance is essentially longer, the initiation of the main charge (2) will be widely spread and not significantly effected by that
In the above described embodiment a centre charge is used to ignite the main charge in the centre or not It is also possible to move the igniter axially to ignite the main charge or not However, this solution has some drawbacks One is that it is difficult to ignite the main explosive directly with an igniter Usually, especially if an insensitive explosive is used, there is a need for a booster charge between the igniter and the mam charge It is also possible to substitute the transfer charge and centre charge with three electrically controlled igniter charges to control the ignition of the mam charge
Figure 7 and 8 show the progress of the detonation in a demolition charge according to the invention In both figures the detonation front has reached into the main charge, but from different starting points Figure 7 shows how the detonation front is spreading from two peripheral points, while figure 8 shows how the detonation front mainly is spreading from the centre of the mam charge (2) In figure 7, the ignition charge (3), transfer charge (5,6), and a part of the mam charge have detonated (20) The detonation will continue in the mam charge and primarily hit the insert (4) from two opposite directions This brings about that the insert collapses across a line and in that way produces a flat cutting jet In figure 8 the centre charge (9) is located between the ignition charge (3) and the mam charge (2) The centre charge (9) and the transfer charge (6,6) are initiated essentially at the same time by the ignition charge (3) Because the centre charge (9) provides a shorter way than the transfer charge (5,6) the detonation front will reach the centre of the main charge before the periphery When the detonation front finally reach the periphery of the main charge (2), the detonation in the main charge has already gone so far that the detonation front provided through the transfer charge (5,6) has no essential effect on the progress of the detonation in the main charge By that the result is that the insert (4) is pressed from all directions and collapses in a dot and produces a beam-like cutting jet
The figures 9-13 show two different types of switches who in one simple operation can switch the charge between a beam-like cutting jet (normal cutting jet) and a linelike cutting jet Figures 9 and 10 show a switch in the form of a slid (7), which can be moved between the two shown positions In figure 9 the slid is in the position for line- like cutting jet, owing to that the centre charge (9) is not in connection with the ignition charge (3) However, in figure 10 the centre charge (9) is in connection with the ignition charge (3) and the centre of the main charge (2) as in figure 6 The figures 11 and 12 show a switch in the form of a knob (8), suitably with teeth (11), which may be turned between a position where the centre charge (9) is not in connection with the ignition charge (3) and another where the centre charge (9) is Figure 13 shows a schematic X-ray picture of a cutting jet from a cylindrical charge ignited in the centre. Figure 14 and 15 show in a similar way a line-like cutting jet from a cylindrical charge initiated in two peripheral points. Figure 15 is shifted 90 degrees compared to figure 14 and shows how the beam spreads in a fan shaped manner in one plane.
The explosive used in the transfer charges and in the centre charge is preferably a cast, pressed or extruded booster explosive, which makes sure that the main charge is initiated. For the main charge a for these kind of charges suitable explosive is chosen, e.g. an insensitive explosive making the charge shock resistant with IM- features (Insensitive Munition).

Claims

1 Shaped demolition charge (1), characterised by that the charge is switchable between a beam-like cutting jet and a line-like cutting jet
2 Shaped demolition charge (1 ) according to claim 1, characterised b y that at beam-like cutting jet a mam charge (2) is ignited in the centre, and at line-like cutting jet the mam charge (2) is ignited in two, around the centre, symmetrically located points (25,26) on the mam charge (2)
3 Shaped demolition charge (1) according to claim 1 or2, characterise d by that the switch between beam-like cutting jet and line-like cutting jet takes place by that a centre charge (9) ignites the main charge (2) in the centre or not
4 Shaped demolition charge according to claim 1 or 2, characterised b y that the switch between beam-like cutting jet and line-like cutting jet takes place by that a movable centre charge (9) ignites the mam charge (2) in the centre or not
5 Shaped demolition charge according to any of the claims 1-4, character i s e d by that the two points (25,26) are located on the periphery of the main charge (2)
6 Shaped demolition charge (1) comprising a mam charge (2), for producing a beam-like cutting jet, and an ignition charge (3), characterised by a transfer charge (5,6) which connects the ignition charge (3) to the mam charge (2) in two points (25,26), symmetrically located around the centre of the mam charge (2), and a centre charge (9) which could connects the ignition charge (3) to the centre of the mam charge (2)
7 Shaped demolition charge according to claim 6, characterised by that the mam charge (2) is round
8 Shaped demolition charge according to any of the claims 6-7, c h a r a c t e r i s e d by that the points (25,26) are arranged on or in the vicinity of the periphery of the main charge (2)
9. Shaped demolition charge according to any of the claims 6-8, characte r i s e d by that at line-like cutting jet the centre charge (9) is moved away from the ignition charge (3) so that the main charge (2) is ignited through the transfer charge (5,6).
10. Shaped demolition charge according to any of the claims 6-9, characte r i s e d by that at beam-like cutting jet the centre charge (9) is moved to connect the ignition charge (3) with the centre of the main charge (2).
11. Shaped demolition charge according to any of the claims 6-10, charact e r i s e d by that the centre charge (9) is arranged on a switch, e.g. a slide (7) or a knob (8).
PCT/SE2002/001504 2001-08-23 2002-08-23 Shaped demolition charge WO2003019101A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT02760967T ATE428904T1 (en) 2001-08-23 2002-08-23 SHAPED EXPLOSIVE CHARGE
DE60231993T DE60231993D1 (en) 2001-08-23 2002-08-23 SHAPED SPARKLING
EP02760967A EP1427982B1 (en) 2001-08-23 2002-08-23 Shaped demolition charge

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0102814A SE522180C2 (en) 2001-08-23 2001-08-23 Charged with directed blasting effect that can be switched between beam-forming directed blasting action and linear directed blasting action
SE0102814-1 2001-08-23

Publications (1)

Publication Number Publication Date
WO2003019101A1 true WO2003019101A1 (en) 2003-03-06

Family

ID=20285111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/001504 WO2003019101A1 (en) 2001-08-23 2002-08-23 Shaped demolition charge

Country Status (5)

Country Link
EP (1) EP1427982B1 (en)
AT (1) ATE428904T1 (en)
DE (1) DE60231993D1 (en)
SE (1) SE522180C2 (en)
WO (1) WO2003019101A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172591B (en) * 1962-05-30 1964-06-18 Deutsch Franz Forsch Inst Shaped charge
US4026211A (en) * 1975-03-07 1977-05-31 Forenade Fabriksverken Hollow-charge shell and antitank weapon for said shell
EP0226185A1 (en) * 1985-12-18 1987-06-24 DIEHL GMBH & CO. Hollow charge projectile
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
EP1164348A2 (en) * 2000-06-13 2001-12-19 General Dynamics Ordnance and Tactical Systems, Inc. K-charge - a multipurpose shaped charge warhead

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172591B (en) * 1962-05-30 1964-06-18 Deutsch Franz Forsch Inst Shaped charge
US4026211A (en) * 1975-03-07 1977-05-31 Forenade Fabriksverken Hollow-charge shell and antitank weapon for said shell
EP0226185A1 (en) * 1985-12-18 1987-06-24 DIEHL GMBH & CO. Hollow charge projectile
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
EP1164348A2 (en) * 2000-06-13 2001-12-19 General Dynamics Ordnance and Tactical Systems, Inc. K-charge - a multipurpose shaped charge warhead

Also Published As

Publication number Publication date
DE60231993D1 (en) 2009-05-28
EP1427982B1 (en) 2009-04-15
SE0102814L (en) 2003-02-24
SE522180C2 (en) 2004-01-20
SE0102814D0 (en) 2001-08-23
ATE428904T1 (en) 2009-05-15
EP1427982A1 (en) 2004-06-16

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