EP4193115A1 - Verfahren zur herstellung eines thermisch stabilen leitwerks sowie entsprechendes leitwerk - Google Patents
Verfahren zur herstellung eines thermisch stabilen leitwerks sowie entsprechendes leitwerkInfo
- Publication number
- EP4193115A1 EP4193115A1 EP21743075.0A EP21743075A EP4193115A1 EP 4193115 A1 EP4193115 A1 EP 4193115A1 EP 21743075 A EP21743075 A EP 21743075A EP 4193115 A1 EP4193115 A1 EP 4193115A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cone
- blank
- tail unit
- empennage
- ammunition
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/02—Stabilising arrangements
- F42B10/04—Stabilising arrangements using fixed fins
- F42B10/06—Tail fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/02—Stabilising arrangements
- F42B10/04—Stabilising arrangements using fixed fins
- F42B10/06—Tail fins
- F42B10/08—Flechette-type projectiles
-
- 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
- F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
- F42B12/06—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with hard or heavy core; Kinetic energy penetrators
Definitions
- the present invention relates to a method for producing a thermally stable tail unit and a corresponding tail unit.
- Appropriate tail units are required for missiles, for example ammunition, in order to stabilize and/or improve their flight characteristics and to ensure their aerodynamic stability.
- KE ammunition means "kinetic energy"
- tail units In order to be able to achieve an acceptable muzzle velocity, it is imperative to reduce the dead mass of the missile, since missiles with lower masses can achieve a longer range.
- the dead mass is the mass of the ammunition that does not produce a bullet effect.
- parts of the missile for example the tail unit
- the tail unit it is known to manufacture the tail unit from aluminum, since aluminum has a low density and is therefore a light metal, ie a light material.
- the wing edges can be heated up by the fact that friction acts on the wing edges when passing through the barrel from which the munition is fired.
- the wings are guided through a powder bed of the propellant charge when they are fired, which can lead to further friction and even abrasion of the wing edges.
- More modern missiles compensate for this disadvantage by selecting the appropriate material for the tail unit. Steel is primarily used here. However, a missile equipped in this way has a higher weight in comparison to the missile with aluminum tail unit described above, since steel has a higher density than aluminum.
- a fin-stabilized sub-caliber projectile is known from EP 0 300 373 A2, for example, which has either a tail unit made of steel or aluminum.
- Coated aluminum fins are also known from the prior art, with ceramic for example acting as a coating for the aluminum fins.
- ceramic for example acting as a coating for the aluminum fins.
- such a coating requires a high level of manufacturing complexity and thus generates higher costs.
- a blank be provided with a taper and a cone be provided with a taper as well.
- the circular blank according to the invention is preferably shaped like a truncated cone and designed to be solid.
- the cone according to the invention is also shaped like a truncated cone and has a cavity.
- the cavity is arranged in the cone in such a way that it can at least partially accommodate the circular blank.
- the sloping sides of the blank and the sloping inner surfaces of the cone are preferably designed in such a way that when the blank is inserted into the cone, these sides touch flatly.
- the circular blank enters into a connection with the cone, specifically at the side surfaces that are in contact.
- the connection is implemented as a positive, material or non-positive connection or as a combination of the aforementioned connections, in particular by friction welding. It is proposed that friction welding occurs by rotating one of the bodies, either the cone or the round. It is also possible both bodies to rotate, namely against each other, to allow friction welding. Special friction welding devices are known for this.
- the two bodies can also be connected by mechanical connections, e.g. by riveting, gluing, casting, etc.
- the two bodies are rubbed against each other with their touching side surfaces during rotation, so that frictional heat is generated. Due to this frictional heat, the material on the touching side surfaces is at least partially heated in such a way that a connection is formed between the two bodies.
- the empennage can then be worked out from the resulting combination of blank and cone. In a preferred embodiment, this is worked out by a machining process, for example a milling process.
- the blank In order to keep the weight of the empennage as low as possible, it is proposed to make the blank from a material with a lower density than the cone.
- the blank could be made of aluminum, magnesium or another light metal.
- the cone be made of steel, tungsten or the like.
- the tail unit according to the invention then consists of a core which corresponds to the material of the round and a coating which corresponds to the material of the cone.
- the material of the cone has a higher thermal stability than the material of the blank. This ensures that the tail unit does not burn off in the event of air friction acting on it.
- the cone and also the circular blank are equipped axisymmetrically and have a central axis.
- both bodies then have a common central axis.
- the empennage manufactured by the aforementioned manufacturing method then comprises a wing core and a wing edge, the wing core consisting of the material of the blank and the wing edges of the material of the cone. It is preferably proposed to attach a tail unit according to the invention to ammunition, preferably to KE ammunition.
- the tail unit according to the invention can be attached to the ammunition by means of mechanical joining, or fastening means are provided on the tail unit to attach the tail unit to the ammunition.
- the aforementioned method and the corresponding tail unit realize the advantages of a light tail unit, such as a longer range for a corresponding missile.
- the higher density as well as the higher thermal stability of the wing edge ensure or prevent the wing from burning off later.
- the higher density of missiles such as ammunition also prevents breakouts on the wing edges when passing through the tube or on the way through the powder bed.
- FIG. 1 A blank according to the invention and a cone according to the invention
- FIG. 2 A combination of blank and cone according to the invention
- FIG. 3 a tail unit according to the invention attached to a munition.
- FIG. 1 shows a blank 3 according to the invention, which is solid 4 and a cone 1 according to the invention, which has a cavity 2 .
- the cone 1 is preferably made of a harder material than the blank 3. This means that the material of the cone 1 has a higher density than the material of the blank 3.
- the material of the cone 1 is preferably also more thermally stable than the material of the blank 3.
- Both bodies, ie cone 1 and blank 3 are designed as truncated cones and have tapers 5, 6.
- the tapers 5, 6 are designed in such a way that the blank 3 can be introduced into the cavity 2 of the cone.
- the side surfaces of the tapers 5, 6 touch each other after insertion.
- Both bodies 1 , 3 have a central axis 7 , so that both bodies 1 , 3 have a common central axis 7 after the blank 3 has been introduced into the cavity 2 of the cone.
- a connection 8 is now produced, which preferably runs circumferentially around the tapering side surfaces, for example by friction welding. It is preferably proposed to carry out the friction welding by rotating one of the bodies (1, 3). The rotating body rubs against the non-rotating body (1, 3). This friction creates frictional heat, which causes the friction weld and thus the connection 8 . Both bodies can also be rotated against each other.
- the bodies connected in this way can now be mechanically processed in such a way that a tail unit is created.
- a milling method is proposed, through which a tail unit with a wing core 11 and a wing edge 10 is formed from the composite of the two bodies 1 , 3 .
- the tail unit created in this way can preferably be designed symmetrically and have several wing edges 10 .
- the tail unit according to the invention be attached to a missile, in particular an ammunition.
- the attachment can be done by mechanical joining or by fastening means provided for this purpose on the tail unit.
- the tail unit according to the invention has proven to be particularly effective on KE ammunition.
- the aforesaid method of manufacture enables the simplest manufacture possible while at the same time being thermostable.
- the design of the wing core in lightweight construction also ensures a high flight distance of the missile.
- the present invention is not limited to the features described above. Rather, further training is conceivable.
- the circular blank or the wing core could consist of titanium or the cone or the wing edges could consist of carbides. Furthermore, the blank and the cone could only partially touch in order to keep the two materials at a distance in certain areas.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020120850.2A DE102020120850B4 (de) | 2020-08-07 | 2020-08-07 | Verfahren zur Herstellung eines thermisch stabilen Leitwerks sowie entsprechendes Leitwerk |
| PCT/EP2021/068609 WO2022028798A1 (de) | 2020-08-07 | 2021-07-06 | Verfahren zur herstellung eines thermisch stabilen leitwerks sowie entsprechendes leitwerk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4193115A1 true EP4193115A1 (de) | 2023-06-14 |
| EP4193115B1 EP4193115B1 (de) | 2024-09-04 |
Family
ID=76971832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21743075.0A Active EP4193115B1 (de) | 2020-08-07 | 2021-07-06 | Verfahren zur herstellung eines thermisch stabilen leitwerks sowie entsprechendes leitwerk |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4193115B1 (de) |
| DE (1) | DE102020120850B4 (de) |
| WO (1) | WO2022028798A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3134278A (en) * | 1959-08-12 | 1964-05-26 | American Mach & Foundry | Friction welding |
| EP0300373B1 (de) | 1987-07-20 | 1992-06-17 | Oerlikon-Contraves AG | Flügelstabilisiertes Unterkalibergeschoss |
| DE3927798A1 (de) | 1989-08-23 | 1991-03-14 | Rheinmetall Gmbh | Fluegelstabilisiertes geschoss |
| DE3927917A1 (de) * | 1989-08-24 | 1991-02-28 | Rheinmetall Gmbh | Fluegelstabilisiertes geschoss |
| AU8265291A (en) | 1990-09-04 | 1992-03-12 | Welding Institute, The | Friction surfacing |
| DE4141560C2 (de) * | 1991-12-17 | 1996-02-22 | Rheinmetall Ind Gmbh | Wuchtgeschoß |
| DE19837533C2 (de) * | 1998-08-19 | 2002-11-07 | Rheinmetall W & M Gmbh | Flügelstabilisiertes Wuchtgeschoß |
| PT1516153E (pt) | 2002-06-26 | 2012-03-30 | Geke Technologie Gmbh | Projéctil ou ogiva |
-
2020
- 2020-08-07 DE DE102020120850.2A patent/DE102020120850B4/de active Active
-
2021
- 2021-07-06 WO PCT/EP2021/068609 patent/WO2022028798A1/de not_active Ceased
- 2021-07-06 EP EP21743075.0A patent/EP4193115B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020120850B4 (de) | 2022-06-15 |
| DE102020120850A1 (de) | 2022-02-10 |
| WO2022028798A1 (de) | 2022-02-10 |
| EP4193115B1 (de) | 2024-09-04 |
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