DE102013006498A1 - Sabot projectile - Google Patents

Abstract

The invention relates to a sabot projectile (1) with a sub-caliber projectile body (2) and a sabot (4) which has an essentially hollow cylindrical guide cage (7) and a segmented, radially inwardly extending projectile body in the front area of the guide cage (7) (2) comprises holding disc-shaped guide element (8). In order to ensure that the guide element (8) has as little play as possible between its outer edge and a corresponding weapon barrel, despite its relatively low weight, within the largest possible temperature range, the invention proposes a narrow segmented steel disk (14) as the guide element (8) , 12, 13) to be used, which on the side facing the guide cage (7.1, 7.2) is connected to a segmented, hollow cylinder-shaped cladding part (15, 15.1, 15.2) made of plastic with a positive and / or non-positive fit.

Description

The invention relates to a sabot projectile with a subcaliber projectile body and a sabot, the rear side acting on the projectile body driving element, a front side of the drive element subsequent segmented and substantially hollow cylindrical guide cage and a segmented, in the front region of the guide cage radially inwardly extending and comprising the projectile body, disc-shaped guide member comprises.

Such bullets, which may be, for example, shootable from armored weapons 120 mm KE-practice bullets are from the publications DE 10 2008 029 394 A1 . DE 10 2008 029 395 A1 . DE 10 2008 029 397 A1 and DE 10 2008 049 146 A1 known. In this case, the guide element usually consists of an aluminum alloy in order to keep the weight of the sabot low. Although are from the DE 10 2008 029 394 A1 Also guide elements made of titanium or steel known, but these materials have not been used in practice because of their high weight.

However, when using guide elements made of an aluminum alloy, it has been found that loading difficulties can arise due to the high coefficient of thermal expansion of aluminum in the known sabot projectiles when they are to be fired at very high temperatures (for example at + 70 ° C.).

To ensure the loading capacity of the corresponding ammunition, even at high temperatures, the diameter of the guide element of the known sabot projectiles can be reduced. However, this can lead to the game at the nominal temperature (20 ° C) between the gun barrel side edge of the guide element and the inner wall of the gun barrel is increased, which can lead to a deteriorated hit performance. This game, and thus the deterioration of the hit performance, are then in sabot projectiles, which are fired at very low temperatures (for example, -40 ° C), even greater.

If a holding band (guide band) is arranged on the segmented guide element made of plastic, must also be noted that on the one hand, the plastic has a relatively high coefficient of thermal expansion and on the other hand there is a risk that the plastic depending on the storage of sabot projectile (moisture) with the time swells. This too can lead to charging difficulties.

The invention has for its object to provide a sabot projectile of the type mentioned, in which within a large temperature range (for example, between -46 ° C and + 71 ° C) as low as possible clearance between the guide member and the inner wall of the gun barrel is present without this, the weight of the guide element must be much higher than the weight of existing aluminum alloy guide elements comparable known sabot projectiles.

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 of using a narrow segmented steel disk, preferably made of stainless steel, as the guide element, since steel has a significantly lower coefficient of thermal expansion than aluminum. In order to achieve that the weight of the guide element according to the invention does not (or not substantially) exceed the weight of existing aluminum guide elements, and nevertheless it has sufficient luffing stability, the steel disk is formed on the side facing the guide cage with a segmented, hollow-cylindrical reinforcing part made of plastic - and / or non-positively connected.

While the wall thickness of the existing aluminum alloy guide elements in known 120 mm KE training floors about the order of 10 mm, the wall thickness of the steel discs of the guide elements for comparable sabot projectiles according to the invention can be selected to be smaller, preferably about 4 mm. As a result - with otherwise comparable sabot projectiles - it can be achieved that the weight of the guide element consisting of steel disc and reinforcing part is even lower than the weight of the guide element consisting of only one aluminum alloy.

The cowling preferably has, in the axial direction of the projectile, a cylindrical first section adjoining the steel disc, the outer diameter of which may be slightly smaller than the outer diameter of the guide element, so that no loading problems arise in the case of a possible expansion or possible swelling of the plastic. At the first section then adjoins the guide cage toward a conically tapered second section, which surrounds the adjoining the steel disc guide cage outside the form-fitting manner.

In a preferred embodiment of the invention, the outer wall of the first section of the reinforcing or lining part has meandering recesses extending in the circumferential direction, the respective bottom region of which bears in a form-fitting manner against the outer wall of the guide cage.

Manufacturing technology results from the manufacturing process spraying (Werkzeugentformbarkeit and possibly equal wall thickness) and the goal of weight savings between two meandering recesses of the outer wall of the first portion of the trim panel in the circumferential direction extending recesses whose bottom portions each have an approximately sawtooth shape. As a positive side effect while the stability of the reinforcing member is increased in a simple manner.

In order to achieve a positive and / or frictional connection between the steel disc and the reinforcing member in a simple manner, it is provided in another embodiment of the invention that the steel disc on its side facing the reinforcing member has an annular, approximately T-shaped, groove-shaped recess has, in the positive and / or non-positive connection engages a corresponding wall portion of the reinforcing member.

Of course, the steel disc can also be non-positively connected to the reinforcing part by means of rivets or by means of gluing.

Further details and advantages of the invention will become apparent from the following, with reference to figures explained embodiments. Show it:

1 the perspective view of a sabot projectile according to the invention, which comprises a sabot with guide cage and guide element and a projectile body;

2 a side view of the in 1 illustrated sabot projectile;

3 a longitudinal section of the sabot projectile along in 2 III-III section line;

4 an enlarged cross section through the sabot floor along the in 3 IV-IV section line;

5 an enlarged cross section through the guide element along the in 2 with VV designated cutting line, for reasons of clarity, the projectile body and the guide cage are omitted.

In the 1 to 3 is with 1 a sabot bullet, which is, for example, a 120 mm KE training bullet. The sabot projectile comprises a subcaliber projectile body 2 with bowling unit 3 and a sabot 4 ( 3 ). In addition, the stern is on the sabot floor 1 a sleeve cover 5 attached to the connection between the sabot floor 1 and forms the sleeve shell of a cartridge case, not shown, receiving propellant powder.

The sabot 4 consists essentially of a rear side on the projectile body 2 acting multipart drive element 6 , a front side of the drive element 6 subsequent hollow cylindrical guide cage 7 (here consisting of two segments 7.1 and 7.2 ) and one in the front area of the guide cage 7 arranged, extending radially inwardly and the projectile body 2 holding guide element 8th with air passage openings 9 , The sabot 4 preferably consists of two independent components (guide cages) 7.1 and 7.2 , These are only on the sealing tape against the drive element 6 and the projectile body 2 compressed (simple assembly and assembly).

According to the preferred embodiment, the (first) guide cage 7.1 from a sealing tape holder 40 , a segment 10 , a half-slice 12 and a trim part 15.1 , The (second) guide cage 7.2 in turn is made of a sealing tape recording 41 , a segment 11 , a half-slice 13 and a trim part 15.2 together.

The sealing tape pickup 40 and the trim part 15.1 for example, on the segment 10 glued on and possibly additionally attached, for example, by riveting, etc. on / on this. The same thing happens with the gasket holder 41 and the trim part 15.2 on the segment 11 , The half-slice 12 is positive and non-positive with the cowling 15.1 connected, the half-disk 13 with the trim part 15.2 , The half-slices 12 . 13 Made of steel, preferably stainless steel, and form a thin steel disc 14 , in turn, the guiding element 8th forms.

To connect the respective half shell 12 . 13 with the corresponding trim part 15.1 respectively. 15.2 have the half-slices 12 . 13 14 on her the fairing part 15.1 . 15.2 side facing an annular extending, approximately T-shaped groove-shaped recess 16 on, in the form-locking connection a corresponding wall area 17 of the trim part 15.1 . 15.2 engages ( 5 ).

The fairing part 15.1 . 15.2 points in the direction of the longitudinal axis 100 of the sabot bullet 1 a to the half-slices 12 . 13 subsequent cylindrical first section 19 on, whose maximum outer diameter is slightly smaller than the outer diameter of the half-shells 12 . 13 formed steel disc 14 is, so it at high temperatures and swelling of the plastic trim parts 15.1 . 15.2 No charging problems when loading the sabot projectile 1 can come in a suitable weapon.

To the first section 19 of the trim part 15.1 . 15.2 joins in to the leadership cage 7 ( 7.1 . 7.2 ) conically tapering second section 20 on, the guide cage 7 encloses on the outside form-fitting manner.

As 4 it can be seen, the outer wall 21 of the first section 19 of the trim part 15 ( 15.2 . 15.2 ) Meandering recesses extending in the circumferential direction 22 on, their respective floor area 23 positive fit on the outer wall 24 of the guide cage 7 ( 7.1 . 7.2 ) is present.

Between the meandering depressions 22 the outer wall 21 of the first section 19 of the trim part 15 are circumferentially extending depressions 25 provided, whose bottom area 26 have an approximately sawtooth shape.

Of course, the invention is not limited to the embodiment described above. Thus, for example, the sabot (and thus the guide cage and the guide member) also consist of more than two interconnected segments. Instead of a steel disc made of stainless steel, it is also possible to use normal steel, which is preferably coated with a protective layer against rusting.

LIST OF REFERENCE NUMBERS

1

Sabot projectile

2

projectile body

3

cone rudder

4

sabot

5

casing cover

6

driving element

7

guide cage

8th

guide element

9

Air passage openings

10, 11

segments

12, 13

half slices

14

steel disc

15

reinforcing part

16

recess

17

wall area

18

rivet

19

first section

20

second part

21

Outer wall (reinforcement part)

22

Meander-shaped depression

23

floor area

24

Outer wall (guide cage)

25

deepening

26

floor area

100

longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008029394 A1 [0002, 0002]
• DE 102008029395 A1 [0002]
• DE 102008029397 A1 [0002]
• DE 102008049146 A1 [0002]

Claims (10)

Sabot projectile with a subcaliber projectile body ( 2 ) and a Treibkäifg ( 4 ), which is on the rear side of the projectile body ( 2 ) acting driving element ( 6 ), a front of the drive element ( 6 ), segmented and substantially hollow cylindrical guide cage ( 7 . 7.1 . 7.2 ) and a segmented, in the front region of the guide cage ( 7 . 7.1 . 7.2 ) radially inwardly extending and the projectile body ( 2 ) holding disc-shaped guide element ( 8th ), having the features: 7.1 ) comprises a sealing tape receptacle ( 40 ), a segment ( 10 ), a half disc ( 12 ) and a segmented trim part ( 15.1 ), • another leadership segment ( 7.2 ) consists of a sealing tape holder ( 41 ), a segment ( 11 ), a half disc ( 13 ) and another segmented trim part ( 15.2 ), where • the half-slices ( 12 . 13 ) a steel disc ( 14 ), which serve as a guiding element ( 8th ) serves. Sabotage bullet according to claim 1, characterized in that the steel disc ( 14 ) has a small wall thickness and preferably consists of stainless steel. Sabotage bullet according to claim 2, characterized in that the thin disc ( 14 ) on her the guide cage ( 7 , 7.1 . 7.2 ) facing side with the hollow cylindrical lining part ( 15 . 15.1 . 15.2 ) is positively and / or non-positively connected. Sabotage projectile according to one of claims 1 to 3, characterized in that the covering part ( 15 . 15.1 . 15.2 ) consists of plastic. Sabotage projectile according to one of claims 1 to 4, characterized in that in a sabot ( 1 ) with a caliber of 120 mm, the wall thickness of the steel disc ( 14 ) ≤ 6 mm, preferably 4 mm. Sabotage projectile according to one of claims 1 to 5, characterized in that the fairing part ( 15 , 15.1 . 15.2 ) in the axial direction of the sabot projectile ( 1 ) one to the disc ( 14 ) subsequent cylindrical first section ( 19 ) whose maximum outer diameter is smaller than the outer diameter of the steel disc ( 14 ) and to the guide cage ( 7 ) conically tapering second section ( 20 ) having the guide cage ( 7 ) encloses the outside form fit. Sabotage bullet according to claim 5, characterized in that the outer wall ( 21 ) of the first section ( 19 ) of the trim part ( 15 . 15.1 . 15.2 ) meandering recesses extending in the circumferential direction ( 22 ), whose respective floor area ( 23 ) form fit on the outer wall ( 24 ) of the guide cage ( 7 . 7.1 . 7.2 ) is present. Sabotage projectile according to claim 5 or 6, characterized in that in each case between two meandering depressions ( 22 ) of the outer wall ( 21 ) of the first section ( 19 ) of the reinforcement part ( 15 ) in the circumferential direction depressions ( 25 ) whose floor area ( 26 ) have an approximately sawtooth-shaped course. Sabotage projectile according to one of claims 1 to 7, characterized in that the steel disc ( 14 ) on its reinforcing part ( 15 ) facing side an annular groove-shaped recess ( 16 ), in which the positive and / or non-positive connection a corresponding wall area ( 17 ) of the reinforcement part ( 15 ) intervenes. Sabotage projectile according to one of claims 1 to 9, characterized in that the sealing tape receptacle ( 40 ) and the trim part ( 15.1 ) on the segment ( 10 ) and the seal receiver ( 41 ) and the trim part ( 15.2 ) on the segment ( 11 ) are glued, for example, and possibly additionally attached, for example by riveting, etc. on / on this.

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