EP0066747A2 - Gun barrel - Google Patents

Abstract

In the case of a weapon barrel with a core barrel length L of> 52 caliber diameter D, which is supported in a bearing 9, 11 with a span a <7 D, the barrel jacket 10 runs cylindrical within the bearing 9, 11, while it extends from the bearing 9 to Pipe mouth 2 runs frustoconical. The center of gravity 6 of the returning mass connected to the weapon barrel lies in the frustoconical area 12 of the barrel outside the bearing 9, 11. According to the invention, these measures reduce the proportion of amplitude of the bending vibration during the projectile passage in the region 12 of the barrel outside the bearing 9. The bending vibration 7 receives a steady progression from shot to shot, especially as a result of the continuously decreasing diameter of the tubular material 12 and the constant radial contact 8 of the tube area 10 in the bearing 9, 11, as a result of which the exit error angle is largely constant.

Description

The invention relates to a weapon barrel according to the preamble of patent claim 1.

Such a gun barrel can be used, for example, as a heavy, large-caliber gun barrel for main battle tank guns.

Gun barrels are known in manifold designs. The aim was always to achieve an increase in performance by increasing the accuracy, for which purpose, for example, the gun barrels were lengthened, the spans of the barrel storage varied or other measures were taken to reduce the angle of departure. A design has emerged as a standard form, in particular in the case of gun barrels for main battle tank cannons, in which the barrel has a multiply offset jacket which is stored in a bearing with short spans. To increase the inertia and reduce the vibration behavior of the pipe the focus of the returning mass was shifted from the area of the bearing towards the pipe mouth.

A device on weapon tubes to reduce the exit error angle of a projectile is known from DE-PS 19 11 067. Bending vibration damping stiffeners are arranged on the weapon barrel in the front length range.

It was recognized that high-frequency bending vibrations of the pipe, which lead the projectile, influence the accuracy. Mainly the accuracy is determined by the exit error angle at which the projectile leaves the pipe mouth, deviating from the target direction.

In addition to the measures according to DE-PS 19 11 067, a large number of parameters influence, for example, structural pipe data such as mass distribution including additional pipe-solid masses, elastic stiffness and the like. and constructive data of the pipe storage, for example bearing spans, bearing play and the like. - apart from other influencing factors - the exit error angle. Particularly disadvantageous are the stepped tubes and indifferently mounted tubes in the outer diameter from the front bearing point to the mouth, which cause unequal vibration-stimulating impulses from shot to shot, which alone lead to purely random exit error angles.

The invention has for its object to provide a weapon barrel of the type mentioned, in which the tube bending vibrations are influenced so that a constant exit error angle is set, with the aim that a more effective exit error angle is entered into the fire control computer and thus to increase the accuracy and leads to a significant increase in performance.

The object is achieved in that in a cannon tube according to the preamble of claim 1, the tube in the static and dynamic state in the area between the pipe mouth and storage has a frustoconical tubular jacket with a continuously unbending bending line and in a cylindrical area of the tubular jacket for the tube storage passes, with the cylindrical portion of the Pipe storage a max. Length does not exceed 7 D and the center of gravity of the returning mass is in the area of the truncated cone-shaped tube jacket.

Advantageous refinements or developments of the invention emerge from the subclaims.

Due to the inventive tubular truncated pipe jacket in the area between the pipe support and the mouth, a significantly increased pipe stiffness is achieved compared to pipes set down in the pipe jacket, the bending line exhibiting a continuously bent course in the static and dynamic state. Based on the knowledge that the pipe bearings, in particular the span and the bearing play, have a significant effect on the outlet error angle, a short bearing length in the range 6 D to 7 D and a shift of the center of gravity of the returning mass into the conical area of the pipe is necessary for the pipe storage provided so that the pipe support does not lift out of its front and rear storage position.

These measures reduce the amplitudes of the oscillatory movement during the projectile run outside of the storage in the pipe. Above all, due to the steadily decreasing diameter of the pipe jacket, the pipe vibration receives a steady progression from shot to shot, whereby the exit error angle is largely constant.

The invention offers further advantages in that not only is vibration damping achieved by increasing the inertia, but the return travel of the returning parts is reduced and the outgoing speed v of the projectile is increased by the long tube construction.

Known pipes with a ratio L / D> 52 do not have this advantageous characteristic of the invention because the pipes are offset several times outside the bearing towards the pipe mouth and there has been no significant increase in the rigidity and mass inertia and the bearing does not have a span of 7. 7 D has.

The invention will be explained in more detail below with reference to the accompanying drawing, which shows a schematic side view of the gun barrel.

The weapon barrel 1 with the core barrel length L and the caliber diameter D has a ratio L / D> 52 and a span a of the barrel bearings 9 and 11 of <7 D. Within the barrel support span a, the barrel jacket has a cylindrical region 10. Starting from the end of the bearing 9, the weapon barrel 1 extends to the barrel mouth 2 without a truncated cone. The bearing 9, 11 of the weapon barrel 1 is in the cradle, not shown (its construction is not essential to the invention). 5 is the center of gravity of the gun barrel and 6 the center of gravity of the parts returning with the barrel during the shot. The returning parts are formed from the pipe recoiler, the pipe brake and any other parts, such as the loading device, as a so-called returning mass. The center of gravity 6 of the returning mass lies in the frustoconical area of the barrel 1 in front of the bearing 9 and ensures a stable contact of the weapon barrel between the bearing points 9, 11 and the cylindrical barrel region 10.

The course of the oscillating movement of the bending vibrations excited during firing is shown in curve 7, 4 showing the theoretical pipe core axis and 3 the unbending bending line of the actual pipe core axis, caused by the forces acting statically on the pipe, around which the course of the Vibration takes place. Not shown is the exit error angle with which the projectile leaves the pipe mouth 2 deviating from the firing direction.

Reference symbol list

• 1 gun barrel
• 2 pipe mouth
• 3 bending line
• 4 theoretical tube core axis
• 5 Center of gravity of the gun barrel
• 6 Center of gravity of the returning mass
• 7 curve shape
• 8 Appendix
• 9 front bearing
• 10 cylindrical area
• 11 rear bearing
• 12 frustoconical tubular casing

Claims (5)

1. Large-caliber weapon barrel with increased accuracy by stabilizing the bending vibrations that occur when shooting, consisting of a truncated cone-shaped and cylindrical barrel with an outer barrel diameter with a ratio of the core barrel length L to the caliber diameter D of L / D> 52, which is stored in the cylindrical barrel barrel area and is connected to other parts forming the returning mass, characterized in that the weapon barrel (1) in the static and dynamic state in the area between the barrel mouth (2) and the bearing (9, 11) has a truncated cone-shaped barrel jacket (12) with a continuously unbent Bending line (3) and merges into a cylindrical region (10) of the tubular jacket for the pipe bearing (9, 11), the cylindrical region (10) of the pipe bearing having a max. Span a does not exceed 7 D and the center of gravity (6) of the returning mass is in the region of the truncated cone-shaped tube jacket (12). 2. Gun barrel according to claim 1, characterized in that the center of gravity of the returning mass (6) lies between the center of gravity (5) of the gun barrel (1) and the front barrel support (9). 3. Gun barrel according to claim 2, characterized in that the jacket diameter of the frustoconical region (12) and the cylindrical region (10) are the same size at the transition point. 4. Gun barrel according to claim 3, characterized in that the cylindrical region (10) of the barrel support (9, 11) does not fall below a minimum length of 6 D. 5. Gun barrel according to claim 4, characterized in that the tubular casing in the cylindrical region (10) does not stand out during a firing interval from the lower region of the front bearing (9) and from the upper region of the rear bearing (11), but rather a stable one Plant (8) forms.

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