EP0156090A2 - Einlagen für Hohlladungs-Gefechtskopf und Verfahren zu ihrer Herstellung - Google Patents

Einlagen für Hohlladungs-Gefechtskopf und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0156090A2
EP0156090A2 EP84630146A EP84630146A EP0156090A2 EP 0156090 A2 EP0156090 A2 EP 0156090A2 EP 84630146 A EP84630146 A EP 84630146A EP 84630146 A EP84630146 A EP 84630146A EP 0156090 A2 EP0156090 A2 EP 0156090A2
Authority
EP
European Patent Office
Prior art keywords
shaped
warhead
liner
sheet
laminated sheet
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.)
Withdrawn
Application number
EP84630146A
Other languages
English (en)
French (fr)
Inventor
Meir Mayseless
Eliezer Faibish
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.)
State of Israel Ministry of Defence Raphael Armament Development Authority
State of Israel
Original Assignee
State of Israel Ministry of Defence Raphael Armament Development Authority
State of Israel
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 State of Israel Ministry of Defence Raphael Armament Development Authority, State of Israel filed Critical State of Israel Ministry of Defence Raphael Armament Development Authority
Publication of EP0156090A2 publication Critical patent/EP0156090A2/de
Withdrawn legal-status Critical Current

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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
    • F42B1/036—Manufacturing processes therefor
    • 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

Definitions

  • the present invention relates to shaped-charge warheads, and is particularly directed to the liners (e.g., conically-shaped liners) for such warheads, and to a method of making such liners.
  • liners e.g., conically-shaped liners
  • the liner in a shaped-charge warhead generates a high velocity penetration jet only from the inner portion of the liner, i.e., the portion on the external side of the charge; the remainder of the liner forms a slug which contributes very little, if anything, to the penetration process.
  • the shaped liner be made of two distinct metals, namely: an outer layer of low-density material such as copper, serving as the base liner metal; and an inner layer of a high-density material, such as gold, electroplated over the inner surface of the copper base liner metal.
  • An object of the present invention is to provide a method of making a liner for a shaped-charge warhead having advantages in the above respects. Further objects of the invention are to provide a novel liner, and also a shaped-charge warhead including the novel liner.
  • a method of making a liner for a shaped-charge warhead- comprising: explosively-welding a sheet of a high-density metal to a sheet of a dissimilar metal to produce a laminated sheet in which the bond between the two metals includes a plurality of interlocking wavelets; compacting the laminated sheet by compressing it to reduce its thickness and also to flatten the interlocking wavelets; and forming the laminated sheet into the required shape of the liner.
  • the invention thus provides an important advantage over the conventional shaped liner used in shaped-charge warheads, in that the invention permits the penetration of shaped-charge jets to be greatly increased without an increase, or with only a slight increase, in the warhead weight.
  • the invention also provides advantages over the previously-proposed electroplating technique for producing such liners particularly in that the new technique is not restricted to the use of materials which can be electroplated and moreover, it does not require the special equipment needed for electroplating.
  • the technique of the present invention has been found to be a practical way of producing such shaped liners at low cost.
  • the invention also provides a shaped liner made in accordance with the above-described technique, and a shaped-charge warhead constructed with such liners.
  • a shaped-charge warhead generally designated 2, including a charge 4 within a cylindrical shell 6 (which may be omitted), a detonator 8 at one end, and a shaped (conical) liner, generally designated 10, at the opposite end.
  • Conical liner 10 is constituted of two metal layers, namely: (a) layer 12, which is the outer layer of the cone but is internally of the warhead 2, this layer 12 being preferably of a low-density metal; and (b) layer 14, which is the inner layer of the cone but the external layer of the warhead, this layer 14 being of a dissimilar, high-density metal.
  • Fig. 2 illustrates what happens to the conical liner 10 upon detonation of the warhead charge 4.
  • the inner high-density layer 14 of the cone forms a high-velocity penetration jet 14' which contributes most to the penetration of the charge
  • the outer layer 12 of the cone forms the slug 12' which contributes very little to the penetration.
  • Fig. 3 illustrates the laminated sheet in its initial flat condition, and therefore designated 10i, which is used for making the conical liner 10 of Fig. 1, which flat laminated sheet includes the two layers, namely the lower-density metal layer 12i and the high-density metaly layer 14i.
  • Fig. 4 illustrates the method of making the laminated sheet 10i of Fig. 3.
  • the sheet 14i of high-density metal (which sheet in this example is the "base plate") is placed against a heavy anvil 20; and the sheet 12i of low-density metal (which sheet in this example is the "flier plate”) is placed to overlie the high-density metal sheet 14i, but is spaced therefrom by a plurality of stand-off spacer elements 22.
  • These elements are spaced around the periphery between sheets 14i and 12i, and may be made of a plastic foam or the like, such as polystyrene foam, which is disintegrated during the explosive-welding process.
  • the laminated sheet 10c is then subjected to a shear-spinning process, as illustrated in Fig. 5, which compacts the laminated sheet by compressing it to reduce its thickness, and also to flatten the interlocking wavelets; at the same time, the laminated sheet is formed into the right-circular conical shape of the liner 10 in Fig. 1.
  • the laminated sheet 10i in its flat condition, is placed against the apex of a conical mandrel 30 in a spinning lathe, and is held against the apex of the mandrel by one or more rollers 32 engaging the laminated sheet around the apex of the mandrel.
  • Back-up ring 34 engages the opposite face of the laminated sheet, which back-up ring is movable in the axial direction along the outer face of the mandrel as guided by back-up pins 36.
  • mandrel 30 is rotated about its axis; rollers 32 are likewise rotated about their axes, and at the same time are moved in the radial direction of the mandrel as relative movement in the axial direction is effected between the mandrel and the rollers.
  • the rollers 32 simultaneously compress the laminated sheet 10i, reducing the thickness of its two layers 12i and 14i, and at the same time form the sheet into the conical configuration of the mandrel 30.
  • the upper roller, designated 32, its back-up ring 34, and back-up pin 36, and the thickness of the laminated sheet 10 between that roller and back-up ring 34, illustrate the positions of the parts and the form and thickness of the laminated sheet at the beginning of the shear-spinning process; whereas the lower roller designated 32', its back-up plate 34', back-up pin 36', and the lower part of the laminated sheet 10 illustrate the position of the parts and the thickness and form of the laminated sheet at the end of the shear-spinning process.
  • the outer marginal rim 10' of the laminated sheet is trimmed away to provide the conical liner 10 illustrated in Fig. 1.
  • Examples of metals which may be used as the high-density layer 14 include tantalum, silver, depleted uranium, gold, and tungsten and their alloys; and examples of metals which may be used as the low-density layer 12 include copper, aluminum, and steel.
  • the low-density metal layer 12 may be copper having an initial thickness of 4 mm.
  • the high-density metal layer 14 may be of tantalum having an initial thickness of 1.25 mm.
  • the shear-spinning process may reduce the thickness of both about one-half when the liner is formed with a cone angle of 60°.
  • Figs. 6 and 7 illustrate the results of this example.
  • Fig. 6 illustrates the condition of the interface before the shear-spinning step
  • Fig. 7 illustrates the condition of the interface after the shear-spinning step.
  • the initial thickness of the high-density metal layer 14i is indicated at t
  • the height of the wavelets 40, interlocking the two metal layers 12i and 14i is indicated at h.
  • t t o sin ⁇
  • the so-produced liner was used as the conical liner 10 in the shaped-charge warhead 2 illustrated in Fig. 1, and upon detonation of the charge, it was found that the liner produced a well-defined high-velocity penetration jet as illustrated at 14' in Fig. 2, whereas the low-density metal layer produced the slug 12' illustrated in Fig. 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
EP84630146A 1983-09-28 1984-09-28 Einlagen für Hohlladungs-Gefechtskopf und Verfahren zu ihrer Herstellung Withdrawn EP0156090A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL69868A IL69868A0 (en) 1983-09-28 1983-09-28 Liners for shaped-charge warhead and method of making same
IL69868 1983-09-28

Publications (1)

Publication Number Publication Date
EP0156090A2 true EP0156090A2 (de) 1985-10-02

Family

ID=11054561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84630146A Withdrawn EP0156090A2 (de) 1983-09-28 1984-09-28 Einlagen für Hohlladungs-Gefechtskopf und Verfahren zu ihrer Herstellung

Country Status (2)

Country Link
EP (1) EP0156090A2 (de)
IL (1) IL69868A0 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0244527A1 (de) * 1985-12-12 1987-11-11 The State Of Israel Ministry Of Defence Israel Military Industries Hohlladung
FR2730049A1 (fr) * 1986-08-22 1996-08-02 Fraunhofer Ges Forschung Dispositif pour produire des projectiles formes par explosion
GB2303687A (en) * 1995-07-27 1997-02-26 Western Atlas Int Inc Shaped charges
CN1068675C (zh) * 1995-06-30 2001-07-18 西亚国际阿特拉斯公司 有形装药的钨增强衬
GB2389888A (en) * 1996-04-02 2003-12-24 Giat Ind Sa Core-generating charge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0244527A1 (de) * 1985-12-12 1987-11-11 The State Of Israel Ministry Of Defence Israel Military Industries Hohlladung
FR2730049A1 (fr) * 1986-08-22 1996-08-02 Fraunhofer Ges Forschung Dispositif pour produire des projectiles formes par explosion
CN1068675C (zh) * 1995-06-30 2001-07-18 西亚国际阿特拉斯公司 有形装药的钨增强衬
GB2303687A (en) * 1995-07-27 1997-02-26 Western Atlas Int Inc Shaped charges
GB2389888A (en) * 1996-04-02 2003-12-24 Giat Ind Sa Core-generating charge
GB2389888B (en) * 1996-04-02 2004-04-28 Giat Ind Sa Core-generating charge with improved performance
DE19758460B4 (de) * 1996-04-02 2012-04-26 Nexter Munitions Projektilbildende Ladung

Also Published As

Publication number Publication date
IL69868A0 (en) 1983-12-30

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Withdrawal date: 19860731

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAYSELESS, MEIR

Inventor name: FAIBISH, ELIEZER