EP0263204A1 - Lineare Schneidladung - Google Patents

Lineare Schneidladung Download PDF

Info

Publication number
EP0263204A1
EP0263204A1 EP86307745A EP86307745A EP0263204A1 EP 0263204 A1 EP0263204 A1 EP 0263204A1 EP 86307745 A EP86307745 A EP 86307745A EP 86307745 A EP86307745 A EP 86307745A EP 0263204 A1 EP0263204 A1 EP 0263204A1
Authority
EP
European Patent Office
Prior art keywords
charge
casing
groove
bar
liner
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
Application number
EP86307745A
Other languages
English (en)
French (fr)
Other versions
EP0263204B1 (de
Inventor
David Alan Dr. Dadley
Peter John Dr. Haskins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems PLC
Original Assignee
Royal Ordnance PLC
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 Royal Ordnance PLC filed Critical Royal Ordnance PLC
Priority to EP86307745A priority Critical patent/EP0263204B1/de
Priority to ES86307745T priority patent/ES2015534B3/es
Priority to AT86307745T priority patent/ATE51958T1/de
Publication of EP0263204A1 publication Critical patent/EP0263204A1/de
Application granted granted Critical
Publication of EP0263204B1 publication Critical patent/EP0263204B1/de
Priority to GR90400326T priority patent/GR3001010T3/el
Priority to GR90300049T priority patent/GR900300049T1/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F42B1/032—Shaped or hollow charges characterised by the material of the liner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/08—Blasting cartridges, i.e. case and explosive with cavities in the charge, e.g. hollow-charge blasting cartridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/28—Cartridge cases characterised by the material used, e.g. coatings

Definitions

  • This invention relates to a hollow charge for linear cutting purposes.
  • Hollow charges comprising a mass of explosive having a variously shaped cavity at one of its surfaces, the cavity being lined with a metal liner. Detonation of the charge violently compresses the metal liner converting it into an outwardly projected slug of metal, the shape of which is dependent upon the shape of the cavity.
  • the slug has powerful penetrating properties which are utilized by detonating the charge with its cavity adjacent and facing a surface to be penetrated, i.e. the work surface. The penetration of the slug is dependent on the separation of the charge from the work surface, i.e. the stand-off distance, the optimum value of which is normally determined by experiment.
  • a hollow charge known for linear cutting purposes comprises an elongated mass of explosive material having a cavity in the form of a V-shaped groove along its length, which mass is encased by a thin walled metal casing. Detonation produces a planar slug along the length of the groove which can be utilized for linear cutting.
  • a lead tube is packed with explosive granules and then passed through a series of rollers arranged to form the packed tube into a bar of chevron cross-section thereby forming a lead-lined, V-shaped groove along the length of the bar.
  • the thickness of the lead wall encasing the two outer apices of the V-shaped groove is relied upon to space the charge from the work surface and thus defines the stand-off distance.
  • Linear cutting charges so produced often have a non-uniform wall thickness and when these non-uniformities occur at the stand-off region or in the lining of the groove, variations in cutting efficiency and a lack of uniformity in cutting power results.
  • the present invention seeks to provide a linear cutting charge having a construction conducive to accurate and uniform formation of its effective dimensions.
  • a linear cutting charge includes an explosive mass formed in the shape of a bar from a composite of explosive material and a first pliant material, the bar having a groove extending longitudinally along one of its faces, within which groove is located a liner formed from a composite of particulate metal and a second pliant material.
  • both the bar and the liner may be formed by extrusion, but formation may also be by other techniques, e.g. moulding or rolling.
  • the particulate metal may advantageously be copper.
  • the first and second pliant materials are chosen to be chemically compatible with the explosive material and are preferably identical.
  • the groove has an outwardly widening, triangular cross-section and both the bar and the liner may be of chevron cross-section, the liner being bonded to the bar so as to cover the surfaces of the groove.
  • the linear cutting charge further includes a casing which may advantageously be substantially rigid to prevent distortion of the bar and the liner during handling, which casing may advantageously include a spacing portion having an engagement surface for presentation to a work surface, which engagement surface is parallel to the outer edges of the liner and spaced therefrom, thereby to maintain an optimum stand-off distance.
  • the casing may be flexible to facilitate cutting of curved surfaces and curved lines.
  • stiffening means may be advantageously included, which may comprise metallic strips embedded in the casing normal to the engagement surface and extending longitudinally on either side of the groove, whereby the bending of the linear cutting charg e may be limited to lateral bending parallel with the engagement surface.
  • the casing may advantageously include a groove filling portion of low density material to prevent the influx of dense material when, for example, the linear cutting charge is used under water.
  • the casing including the spacing portion and the groove filling portion may be integrally constructed from a low density flexible material such as expanded polyethylene.
  • the linear cutting charge of Figures 1 and 2 has an explosive bar 1 of chevron cross-section having a groove 2 defined by the intersecting surfaces 3 and 4 which are included one to the other at an angle of 120 degrees.
  • the bar 1 is formed by extrusion from a pliant mixture of 88% by weight of RDX (Cyclotrimethylenetrinitramine), 8.4% PIB (Polyisobutylene), 2.4% DEHS (2(Diethylhexyl) sebacate), and 1.2% PTFE (polytetrafluroethylene).
  • RDX Cyclotrimethylenetrinitramine
  • PIB Polyisobutylene
  • DEHS Diethylhexyl
  • PTFE polytetrafluroethylene
  • the thickness of the bar measured in a direction normal to either of the faces 3 or 4 is 6.35 mm.
  • a flexible casing 6 of expanded polyethylene surrounds the bar 1 except for the groove 2 and includes spacing portions 7 and 8 which protrude beyond the edges 9 of the liner 5 by a distance of 3.8mm which, for this configuration, is the optimum stand-off distance between the edges 9 and an engagement surface 12 presented to a work surface 10.
  • the casing 6 and the bar 1 are bonded together by a compatible adhesive.
  • the explosive bar 1 may conveniently be initiated by an electrically operated detonator (not shown) which may be affixed externally to the casing at one end of the linear cutting charge.
  • FIG. 3 A second embodiment of the invention is illustrated in Figure 3 in which the bar 1 and liner 5 described with reference to Figures 1 and 2 are surrounded entirely by a casing 11 of a low density material such as expanded polyethylene having an engagement surface 12 which is placed in contact with a work surface 13.
  • the casing 11 comprises a first portion 156 which is substantially the same as the casing 6 of Figure 1 and a groove filling portion 17 which is bonded to the first portion 16 at surfaces 18 and 19 by a suitable adhesive.
  • Stiffening means comprising metallic strips 14 and 15 are embedded in the casing 11 on either side of the groove 2 and normal to the engagement surface 12, thereby limiting bending of the linear cutting charge to lateral bending parallel to the plane of the engagement surface 12.
  • the casing may be of a rigid material such as polystyrene, and any casing may or may not include a groove filling portion.
  • a groove filling portion may alternatively comprise a thin walled, air filled compartment, thereby excluding material from the groove and providing minimal resistance to the cutting slug generated by detonation of the charge.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Dry Shavers And Clippers (AREA)
  • Surgical Instruments (AREA)
EP86307745A 1986-10-08 1986-10-08 Lineare Schneidladung Expired - Lifetime EP0263204B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP86307745A EP0263204B1 (de) 1986-10-08 1986-10-08 Lineare Schneidladung
ES86307745T ES2015534B3 (es) 1986-10-08 1986-10-08 Carga de corte lineal
AT86307745T ATE51958T1 (de) 1986-10-08 1986-10-08 Lineare schneidladung.
GR90400326T GR3001010T3 (en) 1986-10-08 1990-05-24 A linear cutting charge
GR90300049T GR900300049T1 (en) 1986-10-08 1991-07-31 A linear cutting charge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86307745A EP0263204B1 (de) 1986-10-08 1986-10-08 Lineare Schneidladung

Publications (2)

Publication Number Publication Date
EP0263204A1 true EP0263204A1 (de) 1988-04-13
EP0263204B1 EP0263204B1 (de) 1990-04-11

Family

ID=8196171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86307745A Expired - Lifetime EP0263204B1 (de) 1986-10-08 1986-10-08 Lineare Schneidladung

Country Status (4)

Country Link
EP (1) EP0263204B1 (de)
AT (1) ATE51958T1 (de)
ES (1) ES2015534B3 (de)
GR (2) GR3001010T3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130014662A1 (en) * 2010-01-18 2013-01-17 Jet Physics Limited Linear shaped charge
CN104016818A (zh) * 2014-05-29 2014-09-03 山东大学 一种多功能乳化炸药切割装置及其方法
FR3028853A1 (fr) * 2014-11-21 2016-05-27 Pyroalliance Cordeaux detonants de decoupe et leur preparation
FR3130363A1 (fr) 2021-12-15 2023-06-16 Pyroalliance Ensemble séparable par découpe pyrotechnique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU169487U1 (ru) * 2016-08-03 2017-03-21 Станислав Иванович Дорошенко Удлиненный заряд взрывчатого вещества

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR924798A (fr) * 1946-03-09 1947-08-14 D Entpr Et De Mecanique Soc In Perfectionnements aux engins pyrotechniques
US2605703A (en) * 1944-07-06 1952-08-05 Du Pont Liner for hollow charges
US3136249A (en) * 1961-06-12 1964-06-09 Jet Res Ct Inc Shaped charge explosive unit and liner therefor
US3185089A (en) * 1962-06-28 1965-05-25 Thiokol Chemical Corp Flexible linear shaped charge for underwater use
FR2333764A1 (fr) * 1975-12-05 1977-07-01 Poudres & Explosifs Ste Nale Procede de fabrication de cordeaux detonants de decoupage et de charges diedriques ou creuses ameliores et dispositifs ainsi obtenus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2605703A (en) * 1944-07-06 1952-08-05 Du Pont Liner for hollow charges
FR924798A (fr) * 1946-03-09 1947-08-14 D Entpr Et De Mecanique Soc In Perfectionnements aux engins pyrotechniques
US3136249A (en) * 1961-06-12 1964-06-09 Jet Res Ct Inc Shaped charge explosive unit and liner therefor
US3185089A (en) * 1962-06-28 1965-05-25 Thiokol Chemical Corp Flexible linear shaped charge for underwater use
FR2333764A1 (fr) * 1975-12-05 1977-07-01 Poudres & Explosifs Ste Nale Procede de fabrication de cordeaux detonants de decoupage et de charges diedriques ou creuses ameliores et dispositifs ainsi obtenus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130014662A1 (en) * 2010-01-18 2013-01-17 Jet Physics Limited Linear shaped charge
US9045692B2 (en) * 2010-01-18 2015-06-02 Jet Physics Limited Linear shaped charge
CN104016818A (zh) * 2014-05-29 2014-09-03 山东大学 一种多功能乳化炸药切割装置及其方法
FR3028853A1 (fr) * 2014-11-21 2016-05-27 Pyroalliance Cordeaux detonants de decoupe et leur preparation
FR3130363A1 (fr) 2021-12-15 2023-06-16 Pyroalliance Ensemble séparable par découpe pyrotechnique
WO2023111463A1 (fr) 2021-12-15 2023-06-22 Pyroalliance Ensemble separable par decoupe pyrotechnique

Also Published As

Publication number Publication date
EP0263204B1 (de) 1990-04-11
ATE51958T1 (de) 1990-04-15
GR900300049T1 (en) 1991-07-31
GR3001010T3 (en) 1991-12-30
ES2015534B3 (es) 1990-09-01

Similar Documents

Publication Publication Date Title
US4693181A (en) Linear cutting charge
US4430939A (en) Linear shaped charges
US6378438B1 (en) Shape charge assembly system
US3799054A (en) Controlled fragmentation explosive device
US4649824A (en) Apparatus for aerospace vehicle separation events using a linear shaped charge
EP0263204B1 (de) Lineare Schneidladung
US10900756B2 (en) Further improved flexible linear charge system
US5756925A (en) Precision flyer initiator
RU2091697C1 (ru) Способ взрывной резки конструкций и линейный кумулятивный заряд для его осуществления
US20100043661A1 (en) Explosive cutting charge
US3721192A (en) Shaped charge
US6983698B1 (en) Shaped charge explosive device and method of making same
US3169479A (en) Explosively actuated hole cutter
KR0129659B1 (ko) 선형 절단용 장약
US3968724A (en) Method for accurately varying the density of a powder or powder charge, and shrink tubes for use therewith
WO1992008096A1 (en) Explosive lines
US3401636A (en) Clad pyrotechnics
RU97109202A (ru) Способ взрывного разрезания твердых материалов и устройство для его осуществления
FI86814C (fi) Lineaer skaerladdning
US4991511A (en) Non-disruptive detonating cord
WO2024083703A1 (en) Linear shaped charge with integrated shock wave amplification element
RU2235965C2 (ru) Заряд
US3614928A (en) Cast high explosive primer
WO1995035477A1 (en) Tin and tin alloy liners and sheaths for explosive, deflagrating and pyrotechnic products
JP2671564B2 (ja) デュアルエフェクト弾頭

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

17P Request for examination filed

Effective date: 19870909

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH ES GR LI NL

17Q First examination report despatched

Effective date: 19880707

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROYAL ORDNANCE PLC

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH ES GR LI NL

REF Corresponds to:

Ref document number: 51958

Country of ref document: AT

Date of ref document: 19900415

Kind code of ref document: T

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: GR

Ref legal event code: FG4A

Free format text: 3001010

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020905

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020917

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020919

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20020927

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20021007

Year of fee payment: 17

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: BAE SYSTEMS PLC

Free format text: ROYAL ORDNANCE PLC#GRIFFIN HOUSE 5 THE STRAND#LONDON WC2N 5BB (GB) -TRANSFER TO- BAE SYSTEMS PLC#LANCASTER HOUSE, P.O. BOX 87, FARNBOROUGH AEROSPACE CENTRE#FARNBOROUGH, HAMPSHIRE GU14 6YU (GB)

Ref country code: CH

Ref legal event code: NV

Representative=s name: DR. LUSUARDI AG

NLS Nl: assignments of ep-patents

Owner name: BAE SYSTEMS PLC

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031008

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031009

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040504

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040501

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031009