EP0391876A2 - Projectile perforant - Google Patents
Projectile perforant Download PDFInfo
- Publication number
- EP0391876A2 EP0391876A2 EP90850130A EP90850130A EP0391876A2 EP 0391876 A2 EP0391876 A2 EP 0391876A2 EP 90850130 A EP90850130 A EP 90850130A EP 90850130 A EP90850130 A EP 90850130A EP 0391876 A2 EP0391876 A2 EP 0391876A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- projectile
- contact
- nose cone
- casing
- armour
- 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
Links
- 230000035515 penetration Effects 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000004429 Calibre Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 description 5
- 239000002360 explosive Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011154 composite armour Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/06—Electric contact parts specially adapted for use with electric fuzes
- F42C19/07—Nose-contacts for projectiles or missiles
Definitions
- the present invention relates to an armour-piercing projectile of the type which comprises a nose cone with a reinforced tip for mechanical penetration of reactive armour and an impact contact member, placed in the nose cone, for triggering the actuation part of the projectile upon impact against a target.
- a shaped charge comprises, in principle, an outer casing, a metal cone and an explosive. When the explosive detonates, the metal cone is flattened and a metal jet is formed which, with great force, penetrates even very thick and hard armour. As a result of their good action on armoured targets, shaped charges have for a long time constituted a serious threat to armoured vehicles.
- armoured targets can be provided with a reactive armour of the mounted type positioned immediately in front of or at a distance from the main armour of the target.
- Such reactive armour can consist of two metal plates with an intermediate layer of explosive.
- Such reactive armour normally impedes the shaped charge jet of a projectile, and its penetration capability is drastically reduced.
- Swedish Patent 446,483 previously discloses an armour-piercing projectile in which increased penetration capability with respect to active armour was created by means of the nose cone of the projectile being given such a design that it is able to mechanically penetrate the reactive armour before the shaped charge is initiated. This means that the penetration jet of the shaped charge can pass unimpeded by the reactive armour, and in this way full pene-tration capability in the main target is achieved.
- the nose cone of the projectile has a reinforced tip for mechanical penetration of the reactive armour, and the impact contact member is positioned in the nose cone in such a way that contact is obtained only when the reinforced tip has passed the reactive armour without the latter detonating.
- the tip of the nose cone is solid and more pointed than in conventional armour-piercing projectiles, and the impact contact member is not brought right to the tip of the projectile. This provides for the delay which is required for the projectile to be able to penetrate the reactive armour before the shaped charge is initiated.
- Swedish patent 457,187 previously discloses an armour-piercing projectile in which the front part of the nose cone is provided with an internal shoulder, and in which the front part of the contact member is situated close behind this shoulder. A good contact function is in this way retained even in the case of right-angle hits against a target. The front part of the contact member strikes the shoulder and closes the projectile's ignition system for triggering the shaped charge.
- Armour-piercing projectiles of the abovementioned type generally afford a very good function both in the case of typical inclined impact angles and in the case of right-angle impacts. However, with certain types of targets, the contact function may be impaired or completely fail even in these armour-piercing projectiles.
- the aim of the present invention is therefore to provide an armour-piercing projectile which retains a good and reliable contact function even against relatively soft targets, for example targets in which the main armour of the target is relatively thin-walled, such that it is unable to stop the tip of the projectile from penetrating through the armour plate.
- the invention is characterized in that the casing of the nose cone has a weak point where the casing is designed to be deformed and make electrical contact with the contact member upon impact of the projectile against a target.
- the weak point in the outer casing is formed by an annular inner recess, such that a thin-walled section remains.
- the inner shell of the contact member is preferably provided with a bulge in association with the thin-walled section for the purpose of a reduced contact distance between the outer casing and the inner shell.
- a sealing ring is inserted between the outer casing and the inner shell of the contact member at the rear part of the nose cone. This prevents shavings and other undesired particles from coming in between the two shells, the outer casing and inner shell, in the impact contact member and, particularly in the areas with a small contact distance, from causing unintentional contact between the shells.
- Figure 1 shows a first variant of the invention with a solid, pointed tip
- Figure 2 shows a second variant with a solid, truncated tip.
- Figure 1 shows the front part of an armour-piercing projectile provided with a nose cone 1 with a reinforced tip 2.
- the nose cone is screwed onto the projectile body 3 by means of a thread cutting 4.
- the nose cone can comprise two parts, a rear part which is screwed onto the projectile body, and a front tip hood.
- the tip In conformity with an armour-piercing projectile which is shown in the previously mentioned Swedish Patent 446,483, the tip is optimized so as to be able to pass the reactive armour without the latter detonating.
- the tip is thus solid and has a markedly small tip radius, and its material thickness in the longitudinal direction amounts to at least 4 to 5 times the wall thickness of the rear part of the nose cone.
- the tip 2′ of the projectile which is shown in Figure 2 is also solid, but is truncated compared to the pointed tip which is shown in Figure 1.
- a truncated tip can increase the penetration capability of the projectile, since the tip is not deflected as easily against an inclined target surface.
- the two nose cones do not differ.
- the nose cone also comprises an impact contact member in the form of a full-calibre double shell, a shell incorporated in the outer casing of the projectile and an inner shell 5.
- the outer and inner shells of the unused projectile are arranged at a distance and are insulated from each other in such a way that, upon impact of the projectile against a target, they can come into cooperation and make electrical contact with each other.
- the shells form a passive make contact in the projectile's ignition system for triggering the shaped charge.
- the nose cone comprises a rear, large space 6 in which the contact member is accommodated, and a front, shorter space 7 with increased material thickness in the walls.
- the transition between the relatively thin-walled rear part 6 of the nose cone and the front part 7 is designed as an internal shoulder 8 with an annular surface 9 situated in a plane at right angles to the longitudinal axis 10 of the projectile.
- the front cylindrical part 11 of the contact member is situated immediately behind the shoulder 8 and is insulated from this, and yet is designed in such a way that, upon impact of the projectile against a target, it can come into cooperation with the annular surface and make electrical contact with the outer shell.
- the outer casing of the nose cone has a weak point or breakpoint in the form of a thin-walled section 12.
- the inner shell 5 has a bulge 13 for reducing the contact distance between the outer casing and the inner shell in this area.
- the thin-walled section 12 Upon impact of the projectile against a relatively "soft" target of the type in which the tip of the projectile penetrates part of the target, the thin-walled section 12 is deformed as a result of the compressive load, "squeezing", to which the nose area is subjected during penetration. In this way the outer shell comes into cooperation with the inner shell 5 of the contact member and provides the necessary contact function for triggering of the shaped charge part.
- the thin-walled section 12 is deformed and contact is achieved in connection with the nose cone being broken or cracked in the weakened area.
- the contact function has previously been possible for the contact function to fail in the case of certain types of targets.
- a breakpoint is defined in which a deformation occurs and provides the desired contact function even in such "hard” target types.
- a normal contact function is achieved between the internal shoulder and the inner shell as previously.
- the thin-walled section 12 is formed by an inner, annular recess in the outer casing.
- the wall thickness is not quite half of the wall thickness elsewhere.
- the section is situated approximately in the centre of the nose cone in the longitudinal direction and extends in the longitudinal direction to permit a bulge 13 on the inner contact cone.
- a sealing ring 14 is inserted between the outer shell and the inner shell 5 at the rear part of the nose cone.
- Such particles can be, for example, metal shavings which can be worn loose from the thread 4 when the nose cone is screwed onto the projectile body. Such shavings could come loose and swirl around between the shells and bring about contact in those areas of the contact member where the contact distance is small.
- the sealing ring 14 is therefore situated at the rear part of the nose cone in an area where the contact distance is greater.
- the sealing ring is made of an electrically non-conducting material, preferably compressible and insensitive to humidity, for example material marketed under the name Fagerdala PC 225. This material is very light and compressible and can be pressed in between the shells and sits secured in this position.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Electric Cable Installation (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Telephone Function (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8901204A SE468529B (sv) | 1989-04-06 | 1989-04-06 | Pansarspraenggranat |
SE8901204 | 1989-04-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0391876A2 true EP0391876A2 (fr) | 1990-10-10 |
EP0391876A3 EP0391876A3 (fr) | 1992-02-26 |
EP0391876B1 EP0391876B1 (fr) | 1996-06-05 |
Family
ID=20375567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90850130A Expired - Lifetime EP0391876B1 (fr) | 1989-04-06 | 1990-04-04 | Projectile perforant |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0391876B1 (fr) |
AT (1) | ATE139026T1 (fr) |
DE (1) | DE69027251D1 (fr) |
ES (1) | ES2089006T3 (fr) |
GR (1) | GR3020857T3 (fr) |
SE (1) | SE468529B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5515786A (en) * | 1994-04-15 | 1996-05-14 | Luchaire Defense Sa | Projectiles for attacking hard targets and method for controlling initiation of a projectile |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373687A (en) * | 1964-04-07 | 1968-03-19 | Bofors Ab | Wire mounting for an electric fuze of a shaped-charge projectile |
FR2157152A5 (en) * | 1971-10-20 | 1973-06-01 | Serat | Nose cone contactor for projectiles - with high degree of sensitivity |
US4831936A (en) * | 1985-01-31 | 1989-05-23 | Aktiebolaget Bofors | Armor piercing shell |
US4913057A (en) * | 1987-04-03 | 1990-04-03 | Aktiebolaget Bofors | Armor piercing shell |
-
1989
- 1989-04-06 SE SE8901204A patent/SE468529B/sv not_active IP Right Cessation
-
1990
- 1990-04-04 ES ES90850130T patent/ES2089006T3/es not_active Expired - Lifetime
- 1990-04-04 EP EP90850130A patent/EP0391876B1/fr not_active Expired - Lifetime
- 1990-04-04 DE DE69027251T patent/DE69027251D1/de not_active Expired - Lifetime
- 1990-04-04 AT AT90850130T patent/ATE139026T1/de not_active IP Right Cessation
-
1996
- 1996-08-22 GR GR960402214T patent/GR3020857T3/el unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373687A (en) * | 1964-04-07 | 1968-03-19 | Bofors Ab | Wire mounting for an electric fuze of a shaped-charge projectile |
FR2157152A5 (en) * | 1971-10-20 | 1973-06-01 | Serat | Nose cone contactor for projectiles - with high degree of sensitivity |
US4831936A (en) * | 1985-01-31 | 1989-05-23 | Aktiebolaget Bofors | Armor piercing shell |
US4913057A (en) * | 1987-04-03 | 1990-04-03 | Aktiebolaget Bofors | Armor piercing shell |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5515786A (en) * | 1994-04-15 | 1996-05-14 | Luchaire Defense Sa | Projectiles for attacking hard targets and method for controlling initiation of a projectile |
Also Published As
Publication number | Publication date |
---|---|
DE69027251D1 (de) | 1996-07-11 |
EP0391876A3 (fr) | 1992-02-26 |
SE8901204D0 (sv) | 1989-04-06 |
GR3020857T3 (en) | 1996-11-30 |
EP0391876B1 (fr) | 1996-06-05 |
SE8901204L (sv) | 1990-10-07 |
ATE139026T1 (de) | 1996-06-15 |
ES2089006T3 (es) | 1996-10-01 |
SE468529B (sv) | 1993-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4648324A (en) | Projectile with enhanced target penetrating power | |
US4497253A (en) | Armor-piercing projectile | |
JPH07301499A (ja) | 圧電式の着発信管を備えたタンデム型弾頭 | |
US11802755B2 (en) | Penetrator, use of a penetrator, and projectile | |
US5325787A (en) | Armor-piercing fragmentation projectile | |
USH1235H (en) | Armor-piercing projectile | |
US5945629A (en) | Fuseless ballistic explosive projectile | |
EP0196283B1 (fr) | Projectile perforant | |
US5445079A (en) | Armor-piercing fragmentation projectile | |
US5003883A (en) | Lightweight blast shield | |
US5565648A (en) | Fragmentation casing for a secondary projectile of a tandem warhead | |
GB2113362A (en) | Hollow charges | |
EP0391876B1 (fr) | Projectile perforant | |
EP0285212B1 (fr) | Obus perforant | |
DE3345529C1 (de) | Zielsuchende Munition mit vor ihrer Gefechtsladung-Einlage angeordnetem Sensor-Wandler | |
CN115355776A (zh) | 高可靠性的小口径炮弹弹头引信多向触发综合发火机构 | |
US5515786A (en) | Projectiles for attacking hard targets and method for controlling initiation of a projectile | |
USH344H (en) | High velocity canting shaped charge warhead | |
EP0760458A1 (fr) | Projectile pénétrateur asymétrique | |
RU2125228C1 (ru) | Снаряд | |
JP2526758Y2 (ja) | 成形りゅう弾用信管 | |
KR100424074B1 (ko) | 대반응장갑용 성형작약탄두 | |
WO1990012272A1 (fr) | Unite de munitions | |
GB2337576A (en) | Tandem warhead | |
US20030183111A1 (en) | Mechanically fuzed high explosive projectile using pryotechnic initiation delay |
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 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19920610 |
|
17Q | First examination report despatched |
Effective date: 19940321 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BOFORS AB |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19960605 Ref country code: LI Effective date: 19960605 Ref country code: FR Effective date: 19960605 Ref country code: DK Effective date: 19960605 Ref country code: CH Effective date: 19960605 Ref country code: BE Effective date: 19960605 Ref country code: AT Effective date: 19960605 |
|
REF | Corresponds to: |
Ref document number: 139026 Country of ref document: AT Date of ref document: 19960615 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 69027251 Country of ref document: DE Date of ref document: 19960711 |
|
ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO ROMA S.P.A. |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19960905 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19960906 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2089006 Country of ref document: ES Kind code of ref document: T3 |
|
EN | Fr: translation not filed | ||
REG | Reference to a national code |
Ref country code: GR Ref legal event code: FG4A Free format text: 3020857 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2089006 Country of ref document: ES Kind code of ref document: T3 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19970404 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19970408 Year of fee payment: 8 |
|
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 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970430 |
|
26N | No opposition filed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19970404 |
|
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 EXPIRATION OF PROTECTION Effective date: 19980406 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GR Payment date: 19990312 Year of fee payment: 10 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20000201 |
|
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: 20000430 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050404 |