DE102007037699B4 - Method for connecting the sleeve cover arranged on a projectile to the sleeve jacket of a cartridge - Google Patents

Abstract

Method for connecting the sleeve cover (6) arranged on a projectile (3) to a sleeve jacket (4) of a propellant charge sleeve (2) of a cartridge (1) consisting of a combustible material, characterized in that via the connecting region (9) of sleeve cover (4) 6) and sleeve jacket (4) a shrink tube (11) is positioned, that then the shrink tube (11) is briefly heated to a temperature at which it applies firmly to the components to be interconnected (4, 6), the duration the heating is chosen such that an ignition of the material of the sleeve sheath (4) is reliably avoided, wherein the shrink tube (11) radially compresses the interconnected components (4, 6) and contracts in the axial direction.

Description

The invention relates to a method for connecting the sleeve cover, which is arranged on a projectile, to the sleeve jacket, which consists of a combustible material, of a propellant charge sleeve of a cartridge. The invention further relates to the use of the method for producing großkalibriger armored cartridges from components delaborierter armored cartridges corresponding bullet caliber.

It is for example from the DE 42 01 862 A1 known to delabor from firearms fireable ammunition and then to use parts of this combat ammunition again for a cost-effective production of training ammunition. For this purpose, the propellant charge tube is usually severed at the connecting surface between the combustible sleeve jacket and sleeve cover and removed the projectile with sleeve cover. Subsequently, the combat bullet is then replaced by a training bullet with a sleeve cover attached thereto and connected to the delabored propellant charge pod. For this, the new sleeve cover and the old sleeve jacket are glued together.

In practice, however, these splices have proven to be weak points. It has been shown that even with a normal handling of the corresponding ammunition, the cartridge can break apart at the splice. In addition, it has proven difficult to find an adhesive which ensures a secure connection of sleeve sheath and sleeve cover in the temperature range between -40 ° C and 71 ° C, as required by the customers of such cartridges.

Finally, the manufacture of these cartridges from delaborated ammunition components is relatively time consuming. For example, in the area of the new splice, the remaining PU varnish on the sleeve casing of the propellant charge casing must be removed, and after the bonded parts have been bonded together, it is necessary to apply a refinish varnish to the splices.

The same problems arise when ammunition parts of delabored combat ammunition are to be used for newly created combat ammunition. In this case, in addition to the removal of the PU paint from the sleeve jacket and the corresponding paint must be removed from the sleeve cover. In addition, the old adhesive connection between sleeve casing and sleeve cover must be eliminated if the separation of sleeve casing and sleeve cover did not take place precisely in this connection region during the delaboration of the old ammunition.

The EP 0 483 787 A2 discloses a two-part cartridge bag for ammunition propellant. This is a replacement for a backup bag designed to provide a significantly improved internal volume in the laboratory with propellant charge. This sack holds the powder together when the cartridge should break apart. This is not a film and / or a mechanical reinforcement of the sleeve material.

The US 2003/0167952 A1 relates to a cartridge assembly with combustible sleeve material. It is proposed to realize the connection of the sleeve cap with the projectile via a snap connection.

From the DE 83 28 479 U1 is a shell for a propellant known. Here, the shell is formed from a thermoplastic film and is welded shut. This propellant is dimensionally stable and allows belts of multiple propellant charges to be strapped with a foil. When shooting the film burns. For good combustibility, the film consists of a plastic containing the oxygen needed for combustion, so that the shell is energy-supplying. Here, the film does not have the task to support the mechanical stability for the entire cartridge. It serves as a linking agent of the propellant charges.

The DE 39 12 183 C2 shows an ignition device with an expanded plastic sheath on an aluminum sleeve, which is preferably made of a shrink tube and still has an inner adhesive coating. It is a protective jacket, which has the task of reducing the bursting of the aluminum sleeve by Tangentialspannungen, the prevention of trickling of the ignition charge and the avoidance of direct contact of aluminum to the payload.

The invention has for its object to provide a method for connecting a sleeve cover arranged on a projectile on a sleeve casing of a propellant charge sleeve, with the manufacture of cartridges in a simple manner and avoiding elaborate preparation and reworking a secure connection between sleeve casing and sleeve cover , This is to apply in particular in the case that the cartridges are composed of components delaborierter older cartridges.

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, via the connection region of sleeve cover and sleeve casing, a shrink tube whose inner diameter preferably corresponds approximately to the outer diameter of the sleeve sheath, at least slightly larger than the outer diameter of the sleeve to position and then this briefly to a temperature heat, in which it applies firmly to the parts to be joined together, wherein the duration of the heating is selected such that an ignition of the sleeve material is reliably avoided.

A repainting of the splice can usually be omitted in the cartridges produced according to the invention, since the shrink tube not only ensures a secure connection between sleeve casing and sleeve cover, but also ensures mechanical protection against abrasion and a seal of the joint.

So that the shrink tube does not hinder insertion of the corresponding cartridge into the cargo space of the corresponding weapon, its wall thickness after the shrinkage process should be <1.5 mm, preferably ≦ 1 mm.

To make the production of the new cartridge as simple as possible, it has proven to be advantageous if the two parts to be joined together are glued together before applying the shrink tube.

The heating of the shrink tube can be done for example with the aid of an infrared lamp, a hot air blower, a high-frequency furnace or an ultrasonic device, wherein the shrink tube can be heated to a temperature ≥ 100 ° C in the short term.

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

Show it:

1 the partially sectioned side view of a large-caliber tank cartridge produced by the process according to the invention and

2 - 4 in 1 with II designated detail views.

In 1 is with 1 a fired from a tank cannon large-caliber battle cartridge called. The bullet 1 consists of a propellant charge sleeve 2 and a subcaliber bullet 3 , This is the propellant charge sleeve 2 from a sleeve coat 4 made of a combustible material, a sleeve bottom 5 made of metal and a sleeve cover made of an inert plastic material 6 together

The subcaliber bullet 3 consists essentially of a circumferentially segmented sabot 7 , via a unspecified threaded connection with a penetrator 8th is positively connected.

The existing of a combustible material sleeve jacket 4 and with the rear area of the sabot 7 tightly connected sleeve caps 6 have a common connection area 9 on and are non-positively in this area by means of an adhesive 10 connected with each other ( 2 ).

According to the invention is above the connection area 9 between sleeve jacket 4 and sleeve cover 6 a plastic shrink tube 11 arranged, which is both the interconnected components 4 . 6 radially compresses as well as these components 4 . 6 contracts in the axial direction.

The following will focus on the process for producing the cartridge according to the invention 1 (eg a battle cartridge with the caliber 120 mm). It is assumed that the new combat cartridge 1 is made from a revised old combat cartridge, with only the subcaliber bullet 3 was reworked.

The old cartridge is in this case, as known per se, separated in the transition region between the sleeve jacket and sleeve cover. Then from the propellant charge sleeve 2 the powder (not shown) and a in the bottom of the case 5 located Treibladungsanzünder 12 away. Subsequently, the Unterkalibergeschoss, where the sleeve cover 6 Remained, reworked and again with the sleeve coat 4 glued, so that the connection area 9 results.

About this connection area 9 will now be made of plastic shrink tubing 11 (eg, with the outer diameter of the sleeve sheath 4 corresponding inner diameter of 160 mm and a wall thickness of about 0.7 mm) positioned. The shrink tube 11 is then heated with a hot air blower to about 150 ° C and held at this temperature for about 1 minute. He pulls himself firmly on the surface of sleeve cover 6 and sleeve coat 4 and connects these components rigidly together. Due to the very short heating time is excluded that the existing of a combustible material sleeve casing 4 ignited.

Finally, then about the propellant charge 12 receiving opening in the sleeve bottom 5 again powder in the propellant charge sleeve 2 filled and the corresponding opening by screwing the propellant charge igniter 12 closed.

Of course, the invention is not limited to the embodiment described above. Thus, the projectile does not have to be a sabot projectile, but it is also possible for caliber-equivalent projectiles, which have a sleeve cover at the rear, to be connected to corresponding propellant charge pods.

In addition, a bonding of sleeve jacket and sleeve cover omitted if a corresponding holding device for mutual fixation of the components to be joined is present.

Furthermore, the process of the present invention need not be a process for producing a new cartridge by using components of old laboratory cartridges, but may also be the manufacture of cartridges from completely new pre-assembled components.

Finally, a plurality of axially successively arranged connecting regions can be bridged with only one shrink tube. This will be particularly the case when a sleeve-shaped intermediate part has to be inserted between the sleeve casing and the sleeve cover when using components of delaborated cartridges or when repairing existing (and returned) already recycled cartridges. These cartridges are already provided with two adjacent adhesive surfaces. These adhesive surfaces (old joining surface 14 and new recycling cut 15 ) can be cured with the tube cover at the same time.

In the context of recycling, the process can be improved. When plugged into the sleeve jacket can by an additional tool (not shown), preferably at the same time, still a small additional groove 13 be introduced. This background rotation 13 increases the axial connection force by additional positive locking ( 3 ).

As part of the new production of cartridges, the joints of sleeve shell and sleeve cover can also blunt (S) are performed. This allows the low possible joining tolerance with regard to overall length of the cartridge, or free-motion or laboratory volume ( 4 ). Again, a backlash would be positive.

As practicable, the shrink tube B-5 without adhesive, etc., sold by the EAP GmbH has shown, although other shrink tubing can be used.

LIST OF REFERENCE NUMBERS

1

Cartridge, combat cartridge

2

Cartridge case

3

Subcaliber bullet, projectile

4

Sleeve jacket, component

5

sleeve base

6

Sleeve cover, component

7

sabot

8th

penetrator

9

connecting area

10

Glue

11

shrinkable tubing

12

charge igniter

13

undercut

14

old joint

15

recycling section

S

dull cut

Claims (9)

Method for connecting to a projectile ( 3 ) arranged sleeve cover ( 6 ) on a sleeve casing made of a combustible material ( 4 ) a propellant charge sleeve ( 2 ) of a cartridge ( 1 ), characterized in that over the connecting region ( 9 ) of sleeve cover ( 6 ) and sleeve jacket ( 4 ) a shrink tube ( 11 ) is positioned, then that the shrink tube ( 11 ) is briefly heated to a temperature at which it firmly adheres to the components to be interconnected ( 4 . 6 ), wherein the duration of the heating is selected such that an inflammation of the material of the sleeve sheath ( 4 ) is safely avoided, wherein the shrink tube ( 11 ) the interconnected components ( 4 . 6 ) radially compresses and contracts in the axial direction. A method according to claim 1, characterized in that the material of the shrink tube ( 11 ) is selected such that the wall thickness of the shrink tube ( 11 ) after the shrinking process is <1.5 mm. A method according to claim 2, characterized in that the material of the shrink tube ( 11 ) is selected such that the wall thickness of the shrink tube ( 11 ) after the shrinking operation ≤ 1 mm. Method according to one of claims 1 to 3, characterized in that the two components to be joined together ( 4 . 6 ) before applying the shrink tubing ( 11 ) are glued together. Method according to one of claims 1 to 4, characterized in that the shrink tube ( 11 ) before the beginning of the shrinking process has an inner diameter which is approximately the outer diameter of the sleeve sheath ( 4 ) of the propellant charge sleeve ( 2 ) corresponds. Method according to one of claims 1 to 5, characterized in that the heating of the shrink tube ( 11 ) by means of an infrared lamp, a hot air blower, a high-frequency furnace or an ultrasonic device. Method according to one of claims 1 to 6, characterized in that the shrink tube ( 11 ) is briefly heated to a temperature ≥ 100 ° C. Method according to one of claims 1 to 7, characterized in that a small additional groove ( 13 ) is introduced, whereby the axial connection force increases by additional positive engagement. Use of the method according to one of claims 1 to 8 for the production of large-caliber cartridges ( 1 ) from components of delaborated cartridges corresponding bullet caliber.

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