WO2020007585A1 - Boîtier de projectile et procédé de fabrication - Google Patents

Boîtier de projectile et procédé de fabrication Download PDF

Info

Publication number
WO2020007585A1
WO2020007585A1 PCT/EP2019/065480 EP2019065480W WO2020007585A1 WO 2020007585 A1 WO2020007585 A1 WO 2020007585A1 EP 2019065480 W EP2019065480 W EP 2019065480W WO 2020007585 A1 WO2020007585 A1 WO 2020007585A1
Authority
WO
WIPO (PCT)
Prior art keywords
predetermined breaking
enveloping body
wall
breaking point
projectile
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.)
Ceased
Application number
PCT/EP2019/065480
Other languages
German (de)
English (en)
Inventor
Markus Bähr
Felicitas MARX
Michael Biedermann
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.)
Diehl Defence GmbH and Co KG
Original Assignee
Diehl Defence GmbH and Co KG
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 Diehl Defence GmbH and Co KG filed Critical Diehl Defence GmbH and Co KG
Priority to EP19730351.4A priority Critical patent/EP3818325A1/fr
Publication of WO2020007585A1 publication Critical patent/WO2020007585A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/24—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction with grooves, recesses or other wall weakenings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
    • F42B12/22—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
    • F42B12/32—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction the hull or case comprising a plurality of discrete bodies, e.g. steel balls, embedded therein or disposed around the explosive charge

Definitions

  • the invention relates to a projectile shell with an enveloping body surrounding an interior, which has at least one predetermined breaking point for mechanical weakening and targeted disassembly of the enveloping body into at least two fragments.
  • a warhead shell is known from DE 195 24 726 B4, which is in the range of
  • Cutting charges has predetermined breaking points, which are introduced in the form of depressions in the outer wall.
  • the object of the present invention is to propose a projectile shell which is improved in relation to predetermined breaking points.
  • the projectile envelope contains an envelope body which delimits an interior space.
  • the interior is used to hold other structural elements of a projectile (explosives, active elements, detonators, etc.).
  • the enveloping body forms in particular the casing, wall, support structure of the projectile or at least part of it.
  • the enveloping body has at least one predetermined breaking point.
  • the predetermined breaking point serves to mechanically weaken the enveloping body.
  • the shell of the projectile breaks at the predetermined breaking point (s) and is deliberately broken down into at least two or a plurality of fragments.
  • the projectile casing can have further additional elements, for example a cover and an end piece.
  • the envelope body in particular the entire projectile envelope, is produced by means of a 3D printing process.
  • the enveloping body is in particular in one piece.
  • the envelope is made from a raw material.
  • the raw material is solidified into the actual envelope.
  • Solidification is to be understood in particular to mean any form of sintering, hardening, melting, gluing, etc., the processes being able to take place physically and / or chemically, etc.
  • the 3D printing process creates a material of a certain hardness or
  • the predetermined breaking point is formed by the fact that at the location of the predetermined breaking point
  • Starting material is not solidified into a solid, solid part of the enveloping body or the correspondingly created part of the enveloping body is mechanically less firm than the remaining part (not formed by the predetermined breaking points) of the enveloping body.
  • Starting material can be used as in the solid, solid parts of the envelope. This results in either an empty space on or in the envelope or also a structurally weaker section.
  • the envelope body itself is uniformly produced with the 3D printing process with the corresponding same material properties (strength, hardness, resilience, ...) that usually result from the given 3D printing process.
  • material properties stretch, hardness, resilience, .
  • the enveloping body has a continuous inner wall and / or outer wall, in particular inner wall and outer wall, at the predetermined breaking point.
  • “Wall” is to be understood here in terms of a surface.
  • the predetermined breaking point is therefore not an opening in the enveloping body between its inner wall and outer wall.
  • “At the predetermined breaking point” means: in its immediate vicinity, in particular in the area of the radial projection space of the predetermined breaking point.
  • the radial direction is related to a central longitudinal axis of the projectile shell, which corresponds in particular to the central longitudinal axis or the flight or firing direction of the projectile in the later mounted state of the projectile.
  • the outer wall and / or inner wall at the predetermined breaking point are formed in the usual way by the starting material solidified to form the enveloping body.
  • the invention is based on the knowledge that competing design criteria "high active mass vs. low total mass vs. high proportion of energy
  • the invention is based on the consideration that, in order to absorb the launch loads, supporting structures made of solid steel or copper for the
  • Bullet casing could be used. These could then be used either for detonation-guiding inserts or with mechanically inserted notches for targeted disassembly. Another solution would be to insert structural fragments into the supporting structure. However, for all of these solutions it is necessary to accept performance-reducing influences.
  • the invention is based on the idea of introducing predetermined breaking points in the wall (envelope body) of the warhead shell (projectile shell) by means of 3D printing, in particular metal printing.
  • the entire warhead mass (at least the mass of the enveloping body) can be deliberately disassembled and used as acting fragments. A more targeted effect reduces the risk of collateral damage and the overall use a higher active power. This results in a functionalization of the load-bearing shell (envelope body) for targeted disassembly through the use of 3D printing.
  • the entire mass of the projectile casing (at least of the casing body) can serve as fragments, because the shot load by the
  • pre-fragmented shell is included. Furthermore, the size of the fragments can be adjusted in the direction of disassembly and shape. In particular, a splinter warhead can be realized according to the invention.
  • all parts of the projectile casing can be used as the active mass.
  • At least one of the fragments is an active element of the projectile.
  • the envelope thus fulfills one
  • Active elements are, in particular, construction fragments.
  • the entire envelope can be broken down into fragments and all fragments are respective active elements of the
  • the predetermined breaking point is located as an inclusion between the inner wall and the outer wall of the enveloping body.
  • the predetermined breaking point is thus completely inside or the volume of the enveloping body or the wall of the projectile envelope formed by the enveloping body.
  • the inclusion is therefore bounded radially inwards and outwards by a casing section or wall section of the casing body.
  • the envelope body continues in one piece as a respective envelope section both radially inward and radially outward past the inclusion.
  • Such an inclusion is in particular from the outside (i.e. from the inner wall or the outer wall) not recognizable.
  • the predetermined breaking point is thus a (with
  • Starting material filled or partially filled or empty cavity inside or as part of the envelope. If starting material is present in the cavity, it is less or not solidified there to form the actually mechanically stable envelope.
  • a particularly stable, continuous outer wall and inner wall can be realized next to the cavity (seen in the radial direction).
  • the inner wall and / or outer wall can be in the area of the
  • the fact that the outer wall and the inner wall are continued in one piece and without interruption in the area of the predetermined breaking point also results in particularly good mechanical stability in the longitudinal direction of the projectile. So this can also withstand the acceleration of the launch particularly well.
  • the envelope body can thus be made with less material and thus more easily than at a predetermined breaking point due to external notches etc. Overall, the envelope sections result in a type of bilateral support or bridge structure that surrounds the predetermined breaking point.
  • the starting material is a loose starting material, in particular a powder.
  • the starting material has no mechanical stability, or the mechanical stability is comparatively low, so that the enveloping body is weakened particularly effectively there. Nevertheless, the production is simplified since the raw material does not have to be removed at the predetermined breaking point during the 3D printing of the projectile shell. This is particularly advantageous in connection with the above-mentioned inclusion or cavity.
  • the predetermined breaking point at least in the longitudinal direction of the enveloping body (for example in or against the firing direction), its wall thickness has a non-decreasing or non-increasing course between the solidified edges surrounding the predetermined breaking point.
  • the inner and / or outer wall runs in the longitudinal direction at the predetermined breaking point without dents, notches, indentations, grooves, grooves. This affects at least the immediate one
  • Circumferential direction / transverse direction in particular in all directions, d. H. given the predetermined breaking point all around. This leads to a geometrically simple, in particular smooth, shell case.
  • the wall thickness has a constant course between the solidified edges in the longitudinal direction, in particular the other directions mentioned.
  • the inner / outer wall at the predetermined breaking point thus runs in particular smooth, in particular even, cylindrical, conical, spherical, etc.
  • the wall thickness has a non-decreasing or non-increasing or constant profile in the longitudinal direction of the entire envelope body.
  • the wall thickness in the circumferential direction of the enveloping body is constant at at least one longitudinal position of the enveloping body.
  • the wall thickness is constant at all longitudinal positions of the enveloping body.
  • the object of the invention is also achieved by a method according to
  • Claim 1 1 for the production of the invention.
  • the starting material is provided.
  • the envelope is produced by means of a 3D printing process by solidifying the starting material to form the envelope.
  • the at least one predetermined breaking point is formed in the enveloping body in that the starting material is not solidified there or less or less or no there
  • Starting material is introduced into the enveloping body as in solidified areas.
  • the Envelope is made at the predetermined breaking point with a continuous inner wall and / or outer wall.
  • FIG. 1 shows a projectile casing according to the invention in longitudinal section
  • Figure 2 shows the shell of Fig. 1 in cross section.
  • Figures 1 and 2 show a projectile shell 2 with an envelope body 4, which an interior 6 of a to be created, not shown and explained
  • the cutting lines are drawn in the figures by the lines I-1 for Fig. 1 and II-II for Fig. 2.
  • the interior 6 is also delimited by a cover 5 molded onto the envelope body 4.
  • Envelope body 4 and cover 5 are made in one piece, the boundary between the two is only symbolically indicated by dashed lines.
  • the projectile casing 2 also has an end piece 7, which is also made in one piece with the casing body 4.
  • the border is indicated by dashed lines.
  • the shell 2 has one
  • Central longitudinal axis 8 is constructed rotationally symmetrical with respect to its basic shape or external shape.
  • the enveloping body 4 has a number of predetermined breaking points 10.
  • the enveloping body is mechanically weakened at each predetermined breaking point 10.
  • the projectile shell 2 or the shell body 4 breaks at the predetermined breaking points 10. This creates isolated fragments 12 of the shell body as active elements 14, here construction splinters, which are thereby released individually.
  • the fragments are indicated by dashed lines.
  • the enveloping body 4 and here the entire projectile envelope 2 is or is produced in one piece by means of a 3D printing method which is not explained in more detail.
  • a starting material 16 in the example a powder, here steel, becomes a massive
  • the predetermined breaking points 10 are formed in that the starting material 16 is not solidified there.
  • the predetermined breaking points 10 are inclusions 18 or cavities that do not form the rest of the material of the enveloping body 4, i. H. correspond to the solidified starting material 16. Rather, the starting material 16 is still contained in the inclusions 18 as an unconsolidated powder. Alternatively, the starting material 16 is less solidified in the inclusion 18 than in the other enveloping body 4
  • Predetermined breaking points 10 of the enveloping body 4 are mechanically weakened compared to areas without predetermined breaking points 10.
  • the cavities lie completely in the interior of the enveloping body 4 and are therefore surrounded on all sides by solidified material of the enveloping body 4.
  • the inclusions 18 are thus located completely between an inner wall 20 and an outer wall 22 of the enveloping body.
  • a shell section 24 made of fully solidified starting material 16, which continues the remaining shell body 4 in one piece.
  • the predetermined breaking points 10 are created in that the starting material 16 is partially or completely removed at their location and the enveloping body 4 is otherwise constructed around the predetermined breaking point 10 or the inclusion 18.
  • Enclosure 18 is then an actual cavity that has little or no
  • the wall thickness d has a constant course both between the respective solidified edges 26 of the predetermined breaking points 10 in the longitudinal direction 30 of the entire enveloping body 4 (along the central longitudinal axis 8, indicated by a double arrow) and in the circumferential direction 28 (indicated by a double arrow).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

Un boîtier de projectile (2) comprenant un corps enveloppant (4) délimitant un espace intérieur (6) et pourvu d'au moins un point de rupture prédéterminé (10) pour l'affaiblissement et la rupture en fragments (12) est fabriqué par impression 3D et le point de rupture prédéterminé (10) est formé par le fait que le matériau de départ (16) n'est pas solidifié ou est moins solidifié et/ou moins ou du fait qu'il n'y a pas ou qu'il y a moins matériau de départ (16). Le corps enveloppant (4) comporte au point de rupture prédéterminé (10) une paroi intérieure continue (20) et/ou une paroi extérieure continue (22). Dans un procédé de fabrication du boîtier de projectile (2), le matériau de départ (16) est fourni et le corps enveloppant (4) est produit par impression 3D. Le point de rupture prédéterminé (10) est formé comme décrit et, au point de rupture prédéterminé (10), une paroi intérieure continue (20) et/ou une paroi extérieure continue (22) sont réalisées.
PCT/EP2019/065480 2018-07-06 2019-06-13 Boîtier de projectile et procédé de fabrication Ceased WO2020007585A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19730351.4A EP3818325A1 (fr) 2018-07-06 2019-06-13 Boîtier de projectile et procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018005371.8 2018-07-06
DE102018005371.8A DE102018005371B4 (de) 2018-07-06 2018-07-06 Geschosshülle und Herstellungsverfahren

Publications (1)

Publication Number Publication Date
WO2020007585A1 true WO2020007585A1 (fr) 2020-01-09

Family

ID=66857914

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/065480 Ceased WO2020007585A1 (fr) 2018-07-06 2019-06-13 Boîtier de projectile et procédé de fabrication

Country Status (3)

Country Link
EP (1) EP3818325A1 (fr)
DE (1) DE102018005371B4 (fr)
WO (1) WO2020007585A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022002278A1 (de) * 2022-06-23 2023-12-28 Diehl Defence Gmbh & Co. Kg Wirkkörper mit Sollbruchstellen für Geschosse

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050235862A1 (en) * 2004-04-22 2005-10-27 Lockheed Martin Corporation Warhead with integral, direct-manufactured features
DE19524726B4 (de) 1994-08-10 2006-05-24 Rheinmetall W & M Gmbh Gefechtskopf
WO2014095989A1 (fr) * 2012-12-21 2014-06-26 Tda Armements S.A.S Charge militaire a eclats et procede de fabrication
FR3000191A1 (fr) * 2012-12-21 2014-06-27 Tda Armements Sas Charge militaire a eclats et procede de fabrication
WO2016100594A1 (fr) * 2014-12-18 2016-06-23 Raytheon Company Dispositif explosif avec boîtier comportant des vides à l'intérieur de celui-ci
FR3038043A1 (fr) * 2015-06-26 2016-12-30 Nexter Munitions Enveloppe de tete militaire et procede de fabrication d'une telle tete militaire

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9372058B2 (en) * 2011-12-28 2016-06-21 Randy R. Fritz Hollow bullet with internal structure
DE102012205985A1 (de) * 2012-04-12 2013-10-17 Maha-Aip Gmbh & Co. Kg Fahrbahnbelagelemente für einen Rollenprüfstand
WO2015175040A2 (fr) * 2014-02-11 2015-11-19 Raytheon Company Munition à multiples couches de fragments
US9897425B1 (en) * 2016-08-15 2018-02-20 The United States Of America As Represented By The Secretary Of The Army Painted shear liner/density gradient liner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19524726B4 (de) 1994-08-10 2006-05-24 Rheinmetall W & M Gmbh Gefechtskopf
US20050235862A1 (en) * 2004-04-22 2005-10-27 Lockheed Martin Corporation Warhead with integral, direct-manufactured features
WO2014095989A1 (fr) * 2012-12-21 2014-06-26 Tda Armements S.A.S Charge militaire a eclats et procede de fabrication
FR3000191A1 (fr) * 2012-12-21 2014-06-27 Tda Armements Sas Charge militaire a eclats et procede de fabrication
WO2016100594A1 (fr) * 2014-12-18 2016-06-23 Raytheon Company Dispositif explosif avec boîtier comportant des vides à l'intérieur de celui-ci
FR3038043A1 (fr) * 2015-06-26 2016-12-30 Nexter Munitions Enveloppe de tete militaire et procede de fabrication d'une telle tete militaire

Also Published As

Publication number Publication date
DE102018005371B4 (de) 2021-05-20
DE102018005371A1 (de) 2020-01-09
EP3818325A1 (fr) 2021-05-12

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