DE3034471A1 - BULLET STOCK - Google Patents

Description

DORNIER SYSTEM GMBH
7990 Friedrichshafen

Reg. S 363

Bullet

The invention relates to a sub-caliber balancing projectile with a demountable projectile guide, the bore of which Receives the bullet in a form-fitting manner.

Floor guides are used, mostly around the rest To fire armor-piercing projectiles from a gun barrel of larger caliber in order to improve the penetration performance to increase. The bullet guide itself usually consists of a drive ring, in the cavity of which a bullet is located is located and on the shell there are guides that act as sabot, sabot, propulsion piston, traction sheaves, Drive ring are referred to. The bullet guide is divided several times in the longitudinal direction and is released by the forces of the air after leaving the pipe. It transfers the high acceleration forces that occur when firing to the actual one Projectile and leads this in the tube. After leaving the pipe, the guide parts fall to the ground; they don't wear to the effect in the goal, but can endanger your own troops.

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The seal between the floor guide and the inner wall of the pipe against the accelerating propellant gases is carried out by Guide bands or guide rings made of copper, sintered iron or, recently, often made of plastic. The guide parts should be as light as possible in order to facilitate the acceleration process in the pipe and the detachment process. They also have to withstand the high compressive and tensile loads when firing and in the acceleration phase.

Because of these requirements, those are state-of-the-art Bullet guides made of aluminum or magnesium alloys manufactured. Plastics are also used as guide material for small-caliber projectiles. The weight ratio of guide and floor is usually about 1il. There is therefore no lack of attempts to reduce it of the leadership weight share to increase performance and reduce costs. This is mainly done through constructive Measures, use of modern manufacturing processes (e.g. exactor Investment casting), alloy technology (materials of higher strength) and similar measures. So far, no decisive progress has been made either in production costs or in Achieved weight savings.

The invention is based on the object of creating a projectile guide that can be manufactured inexpensively with high accuracy and has only a very low dead weight, whereby compressive strength and tensile strength are guaranteed.

FOLLOWED

This object is achieved according to the invention in that the Bullet guide is a pressed part made of hollow glass spheres with plastic binding material or glass binding material.

The bullet guides are molded compacts made from very small ones Hollow glass spheres, the specific weight of which is about 0.2 g / cm and which arise as waste products e.g. from the combustion of coal dust in the fluidized bed process. The hollow glass spheres have a diameter of about 25 to 1000 µm and are very inexpensive. By adding a small percentage of plastic adhesive or glass binding material, the hollow glass spheres can be pressed according to known methods and by curing or sintering are very pressure-resistant molded parts manufacturable.

The guide bands and rings can be used in the same operation be included if they are placed in the molds before compression molding. With this manufacturing process one achieves the following advantages:

- high accuracy of the parts

- Use of very inexpensive waste products

- extremely light weight

- high compressive strength with sufficient tensile strength

- Saving of manufacturing costs and material costs.

The use of foam glass or syntactic foams offers similar advantages.

'SUBMITTED

The greatest advantages are with small calibers. For larger calibers, the material mentioned can be filled in light metal will.

A particular advantage is that bullet guides made of this material are easy due to the large weight difference and enable quick separation from the projectile and break down into very small and lightweight individual pieces that do not pose a risk represent your own troops.

The invention is described below on the basis of exemplary embodiments.

Fig. 1 shows an arrow projectile, which is with a guide located inside a pipe,

Fig. 2 shows a balancing projectile with a projectile cage and a sabot.

Fig. 1 shows an arrow bullet 2, consisting of projectile tip 4, shaft 6, wing tip 8. The largest diameter of the arrow projectile 2 is smaller than the clear diameter of the tube 9. To fire the arrow projectile therefore a bullet guide 10 required, which is cylindrical is designed and has a bore 12. Bore 12 can be wave-shaped or thread-shaped, so that they

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forms a form-fitting and / or force-fitting connection with a suitably designed jacket of the shaft 6. Both parts can also be designed in the manner of a spline profile or K profile. On the jacket 15 of the bullet guide 10 there are two guide bands 14 which ensure a gas-tight and pressure-tight connection to the pipe. The guide bands are preferably made of plastic, while the projectile guide according to the invention is a pressed part made of hollow glass spheres with plastic binding material or glass binding material, the starting material being commercially available glass balls of 25 µm to 1000 µm are.

The bullet guide 10 is divided several times in the longitudinal direction, so that after the arrow bullet has left the barrel, can detach from it and fall off as the projectile makes its way towards the target.

Fig. 2 shows a balancing projectile 20, which is accelerated by a sabot 22 made of Al material, which at the same time Transferring rotational forces to the projectile and the guide bands 24 contains. The projectile is guided in the tube a sabot 26, which is made of hollow glass material or by foaming and a pendulum of the bullet in the Pipe prevents.

Sept. 4, 1980
PaL / Ht.

Claims (2)

Patent claims: 1.) Lower bullet with a detachable one Bullet guide whose bore accommodates the balancing bullet, characterized in that the bullet guide (10, 26) a pressed part made of hollow glass spheres with plastic or glass binding material is. 2. Balancing projectile according to claim 1, characterized in that that the bullet guide (10, 26) consists of foam glass or is made by foaming. 3, impact projectile according to claim Ü, characterized in that that guide straps (14, 24) are integrated into the bullet guide (10, 26).
\ 4, Sept. JR80 PaL / Ht.