High-wear-resistance rifling with guide rotation deflection angle for launching tube

Abstract

The utility model relates to a launching tube type high-abrasion-resistance rifling with a guide rotation deflection angle, and belongs to the technical field of rifling. Comprising a male thread (1), a female thread (2), a turning guide side (3) and an idle side (4), the male thread (1) and the female thread (2) are arranged at intervals, a rotation guiding side (3) is arranged between the right side of the male thread (1) and the female thread (2), and an idle side (4) is arranged between the left side of the male thread (1) and the female thread (2); the rotation guiding side (3) is arranged to be a wedge-shaped guiding face, the opening angle ranges from 3 degrees to 7 degrees, the falling side (4) is provided with a bearing face, and the opening angle ranges from 30 degrees to 45 degrees; the cross section shape of the rifling is optimized and improved, a traditional rectangular structure is improved into a high-abrasion-resistance structure with a guide deflection angle, and the service life of a gun barrel, a gun barrel and the like is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of rifling, and in particular relates to a high-wear-resistant rifling with a guide deflection angle for a launching tube. Background Art

[0002] Rifling, also known as rifle, is a number of spiral protrusions and grooves located in the inner bore of the barrel and gun barrel, which are inclined at a certain angle to the axis of the inner bore. Its function is to give the projectile a certain rotation speed when it leaves the muzzle to ensure the stability of the projectile in the air. During firing, the inner bore is subjected to transient high temperature, high pressure and strong impact, high speed, high contact force friction and other processes. The rifling wear and thermal ablation are relatively serious, which seriously affects the ballistic performance. When the wear reaches a certain degree, the tube body needs to be scrapped. In order to increase the service life of gun barrels, gun barrels, etc., multiple high-tech technologies have been studied and applied, such as: electroslag remelting, barrel self-tightening, inner bore surface strengthening treatment (such as: plating with wear-resistant material Cr), etc.

[0003] At present, the cross-sectional shape of the rifling is mostly rectangular. When the projectile rotates and moves forward in the bore, the guide side of the positive line is subjected to a large force, which causes serious wear and tear, and eventually causes the rifling to fail. The utility model provides a new idea, that is, by changing the cross-sectional structure of the rifling to improve its wear resistance, thereby increasing the service life of the barrel, cannon barrel, etc. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is: how to provide a high-wear-resistant rifling with a guide deflection angle for a launching tube to solve the problem that the vertical side of the existing rectangular rifling positive line has large contact friction with the bullet belt, large wear, and poor wear resistance of the inner bore.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides a high wear-resistant rifling with a guide deflection angle for a launch tube, comprising: a positive line 1, a negative line 2, a guide side 3, and a fall side 4;

[0008] The positive line 1 and the negative line 2 are arranged at intervals, a guide side 3 is provided between the right side of the positive line 1 and the negative line 2, and a fall side 4 is provided between the left side of the positive line 1 and the negative line 2;

[0009] The guide side 3 is provided as a wedge-shaped guide surface, the opening angle of which is 3°-7°, and the fall side 4 is provided as a bearing surface, the opening angle of which is 30°-45°;

[0010] When the projectile rotates forward, the inclined surface of the guide side 3 is in close contact with one side of the belt, guiding the projectile to rotate.

[0011] The guide side 3 is set as a 5° wedge-shaped guide surface; the fall side 4 is set as a 45° bearing surface.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1) The overall structure is wear-resistant and has excellent stress-bearing structure. The 3° to 7° deflection angle reduces the friction resistance on the rifling guide side and reduces wear; the 30° to 45° non-guide side has increased load-bearing capacity and enhanced torsion resistance.

[0015] 2) Good electroplating deposition processability. Both sides of the rifling are inclined surfaces with a certain angle, which are more conducive to the deposition of electroplating cations compared to traditional vertical surfaces, and have good electroplating processability.

[0016] 3) The movement speed of the projectile is improved. The structure with the guide angle can effectively reduce the guide friction resistance between the projectile and the tube body, thereby increasing the movement speed of the projectile. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, content, and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0019] This embodiment provides a launch tube type high wear-resistant rifling with a guide deflection angle, comprising: a positive line 1, a negative line 2, a guide side 3, and a fall side 4;

[0020] The positive line 1 and the negative line 2 are arranged at intervals, a guide side 3 is provided between the right side of the positive line 1 and the negative line 2, and a fall side 4 is provided between the left side of the positive line 1 and the negative line 2;

[0021] The guide side 3 is provided as a wedge-shaped guide surface, the opening angle of which is 3°-7°, and the fall side 4 is provided as a bearing surface, the opening angle of which is 30°-45°;

[0022] When the projectile rotates forward, the inclined surface of the guide side 3 is in close contact with one side of the belt, guiding the projectile to rotate.

[0023] The guide side 3 is set as a 5° wedge-shaped guide surface; the fall side 4 is set as a 45° bearing surface.

[0024] During the rotation of the projectile, the 5° inclined surface is in close contact with the corresponding side of the belt, which can reliably guide the projectile to rotate and reduce the friction resistance of the projectile. The 45° bearing surface can strengthen the strength of the rifling root, reduce stress concentration, and increase the bearing capacity of the rifling.

[0025] The cross-sectional shape of the rifling is optimized and improved from the traditional rectangular structure to a highly wear-resistant structure with a guide angle, thereby increasing the service life of gun barrels, cannon barrels, etc.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high wear-resistant rifling with a guide angle for a launch tube, characterized in that: include: Yang line (1), Yin line (2), leading side (3), falling side (4); The positive line (1) and the negative line (2) are arranged at intervals, a guide side (3) is provided between the right side of the positive line (1) and the negative line (2), and a fall side (4) is provided between the left side of the positive line (1) and the negative line (2); The guide side (3) is provided as a wedge-shaped guide surface, the opening angle of which is 3°-7°, and the fall side (4) is provided as a bearing surface, the opening angle of which is 30°-45°; When the projectile rotates and moves forward, the inclined surface of the guide side (3) is in close contact with one side of the elastic belt, guiding the projectile to perform a rotational motion.

2. The high wear-resistant rifling with a guide angle for a launch tube as claimed in claim 1, characterized in that: The guiding side (3) is configured as a 5° wedge-shaped guiding surface; and the falling side (4) is configured as a 45° bearing surface.

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