EP2529180B1 - Spin-stabilized projectile - Google Patents

Description

The invention relates to a spin-stabilized projectile with a guide band according to the features of claim 1.

In particular, in artillery ammunition spin-stabilized projectiles are used on which the rear side a guide band is arranged, which is pressed into a corresponding dovetail groove of the projectile. In this case, the guide band may be formed in one or more parts, wherein in the case of a multi-part guide band, the axially adjacent annular part guide belts are also within the dovetail groove of the projectile. The partial guide bands can consist of different materials (for example brass and soft iron) ( DE 198 18 411 A1 )

It has proved to be disadvantageous that in modern artillery projectiles due to the high speed and high centrifugal force thus generated and the relatively large width of the guide bands of about 35 to 40 mm in these projectiles, the durability of the positive connection between the respective guide band and the projectile body frequently is not given. On the contrary, due to the high centrifugal force acting on the guide belt, the respective guide belt can be lifted off or torn, as a result of which the ballistics of the projectile is adversely affected.

FR 396 083 A discloses a spin stabilized projectile according to the preamble of claim 1. It shows a sealing device on artillery projectiles for avoiding the burn-out of projectile tubes, wherein two partial Fürungsbänder axially spaced in each separate dovetail grooves are arranged.

With the US 2003/145757 A1 discloses a spin-stabilized bullet comprising a plurality of guide bands, at least two, which are in a dovetail shape prior to insertion Führungsbandnut be joined together by gluing or welding.

The invention has for its object to disclose a spin-stabilized projectile of the type mentioned, in which the durability of the connection between a multi-part guide band and the corresponding projectile body is also guaranteed when centrifugal forces act on the guide band, as they occur in artillery shells.

This object is achieved by the features of claim 1. Further, particularly advantageous embodiments of the invention disclose the dependent claims.

The invention is based essentially on the idea that each of the partial guide belts is arranged in a separate groove of the projectile. The shape and arrangement of the grooves is dependent on the particular purpose, with the form of a dovetail groove being preferred. - is, inter alia, from the US 2,809,587 A a guide tape is known, which comprises a plurality of thin and spaced-apart ribs, which are filled with a, the guide band forming filling material, however, the technical implementation is very complex. In addition, the partial guide belts may continue to tear. -

In fact, it has proved to be advantageous if the axial spacing of adjacent dovetail grooves and / or the respective mutually facing regions of the partial guide strips are selected such that the partial guide strips directly adjoin one another. However, the partial guide strips can also be designed in such a way that If necessary, a "flow" of the material during the pipe run is made possible.

By replacing a single, relatively long (dovetail) groove by a plurality of shorter (dovetail) grooves is achieved that the centrifugal forces occurring can be better distributed. By selecting appropriate materials for the partial guide bands, both the durability of the connection of the partial guide bands to the projectile body can be ensured and the guide belt wear can be reduced.

The partial guide bands may be made of the same material or different materials, for example, to ensure both high wear resistance and good lubricity. For example, as seen in the direction of firing, first part brass band guide and the second part band made of soft iron.

It is also possible to use a material for at least a partial guide band of the bullet, which on the firing of the projectile defective areas of the inner Surface of the corresponding gun barrel closes (repairs).

Thus, to ensure that the durability of the connection between the multi-part guide band and the corresponding projectile body of the projectile is guaranteed even when high centrifugal forces act on the guide band, as they occur in artillery projectiles, it is now proposed, each of the partial guide belts in one separate groove in dovetail shape to arrange the projectile.

Further details and advantages of the invention will become apparent from the following, explained with reference to drawings embodiment.

The Fig. 1 shows a longitudinal section through the rear-side region of a spin-stabilized explosive projectile 1. Here, the projectile shell of the projectile body 3 and the explosive charge of the projectile 1 are designated by the reference numeral 2.

The projectile 1 comprises a guide band 4, which is composed of preferably two axially successively arranged, annular part-guide belts 5, 6. In this case, seen in the weft direction, first (the front) part guide strip 5 made of brass and the second (rear) part guide strip 6 made of soft iron.

According to the invention, it is now provided that each of the (two) partial guide belts 5, 6 is arranged on the bullet side in a separate groove 7, 8 of the projectile casing 2, in such a way that the axial distance of the (two) dovetail grooves 7, 8 and / or the mutually facing regions 9, 10 of the partial guide bands 5, 6 are selected such that the partial guide bands 5, 6 directly adjoin one another.

Fig. 2 shows a further variant of the integration of the partial guide belts 5, 6, which in this case have a spacing 11 at least in the upper region between each other. This arrangement allows the belts to flow during the passage of the projectile 1.

Of course, the invention is not limited to the embodiment described above. Rather, more than two partial guide belts can be arranged in more than two adjoining dovetail slots. The Partial guide bands in the individual dovetail grooves may also consist of the same material if this is expedient (for example when using a specific ammunition or a corresponding weapon barrel).

LIST OF REFERENCE NUMBERS

1

Projectile, explosive projectile

2

projectile casing

3

explosive charge

4

guide band

5

(first) partial leadership band

6

(second) partial leader band

7.8

dovetail grooves

9.10

areas

11

distance

Claims (5)

1. Spin-stabilized projectile (1) with a guide band (4), which is comprised of at least two annular sub-guide bands (5, 6) arranged axially one after the other, whereby each of the sub-guide bands (5, 6) is arranged in a separate groove (7, 8) of the projectile (1), wherein the grooves (7, 8) are dovetail grooves, characterized in that the axial separation of the adjacent grooves (7, 8) and/or the mutually facing regions (9, 10) of the sub-guide bands (5, 6) are selected so that the sub-guide bands (5, 6) are directly joined together.
2. Spin-stabilized projectile according to Claim 1, characterized in that the sub-guide bands have a separation (11) between them at least in the upper region.
3. Spin-stabilized projectile according to Claim 1 or 2,
   characterized in that
   the sub-guide bands (5, 6) consist of different materials.
4. Spin-stabilized projectile according to Claim 3,
   characterized in that,
   in the case of a guide band (4) consisting of at least two sub-guide bands (5, 6), when looking in the firing direction the first sub-guide band (5) can consist of brass and the second, rear sub-guide band (6) can consist of soft iron.
5. Spin-stabilized projectile according to Claim 1 or 2, characterized in that the sub-guide bands (5, 6) consist of the same material.

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