LV15696B - An armour piercing bullet - Google Patents

Abstract

The proposed subject of the invention relates to armor-piercing bullets, in particular to precision-machined armor-piercing bullets, and a method of their production. The ball (10) contains a body (1) and a first hole (3) and a second hole (5) formed in the body (1) in such a way that the center axes of the two holes (3;5) coincide with the center axis of the ball body (1). The ball (10) additionally contains a core (2) located in the bores (3; 5) in such a way that the core (2) is inserted into the second bore (5) by clamping. The manufacturing method includes the following steps: forming the bullet body (1) by machining the outer profile of the bullet body (1) with chip removal and cutting a flat surface for the front part of the bullet body; drilling the first hole (3) in the front part (6) of the bullet body (1); drilling the second hole (5) in the first hole (3), moreover, the second hole (5) is drilled with a smaller diameter than the diameter of the first hole (3); providing the core with a diameter smaller than the diameter of the first bore (3) and larger than the diameter of the second bore (5); and inserting the core into the first bore (3) and subsequently into the second bore (5) with tension to form the ball (10). The following bullet (10) production method allows for a bullet (10) with improved armor-piercing and accuracy characteristics.

Description

DESCRIPTION OF THE INVENTION

Technical sector

[001] The proposed subject of the invention relates to armor-piercing bullets, in particular to precision-machined armor-piercing bullets and a method of their production.

The known state of the art

[002] The prior art describes various bullets with armor-piercing properties. Such bullets are described in German patent publications no. DE205734, DE211778 and DE4016051, as well as in German patent application publications no. DE4024543 and DE3023220. Similar designs are disclosed in US Patent Publications Nos. US5794320 and US7520224. In addition, the bullets must not only have armor-piercing properties, but these bullets must also be accurate to achieve better range and penetration power characteristics.

[003] Thus, the object of the invention is to improve the above-mentioned bullets in such a way that their armor-piercing and accuracy properties are improved.

Outline of the invention

[004] The goal is achieved by creating a bullet with improved armor-piercing and accuracy characteristics, as well as by improving the method of their production.

[005] The object is achieved by creating a bullet comprising a bullet body and a core inserted into the bullet body.

[006] The bullet body has an outer profile and a chamfered front. The outer profile of the bullet body is modeled after the typical shape or profile of known bullets. The difference is in the truncated front part. The chamfered front makes the manufacturing process easier, especially when making the first hole in the bullet body.

[007] The bullet body contains a first bore formed from the front of the bullet body. The first well is a non-perforating well. The center axis of the first bore coincides with the long axis or center axis of the bullet body. The first hole can be formed by drilling it or using any other known hole making process.

[008] The bullet body contains a second bore formed in the end surface of the first bore. The second well is also a non-perforating well. The center axis of the second bore coincides with the center axis of the first bore and with the longitudinal axis or center axis of the bullet body. The diameter of the second hole is smaller than the diameter of the first hole.

[009] The core is a cylindrical core with flat surfaces at each end. The core is located in the first bore and the second bore so that the longitudinal axis or center axis of the cylindrical core coincides with the longitudinal axis or center axis of the ball body. The diameter of the core is smaller than the diameter of the first bore and larger than the diameter of the second bore in such a way that the core can slip through the first bore into the second bore, and the core is clamped into the second bore. The length of the core is shorter than the length of the two bores in such a way that the core does not go behind the beveled front of the bullet body, and also leaves a space between one end of the core and the base of the other bore.

[010] The diameter of the second bore is smaller than the diameter of the first bore by 0.10 to 0.20 mm, preferably 0.15 mm.

[011] The diameter of the second bore is smaller than the diameter of the core by 0.01 to 0.03 mm, preferably 0.02 mm.

[012] The present invention includes a method of producing a bullet. The method contains the following steps:

- forming the bullet body by performing mechanical processing with chip removal for the outer profile of the bullet body and cutting a flat surface for the front part of the bullet body,

- drilling the first hole in the front part of the ball casing,

- drilling of the second well in the first well, moreover, the second well is drilled with a smaller diameter than the diameter of the first well;

- providing the core with a diameter smaller than the diameter of the first borehole and larger than the diameter of the second borehole; and

- inserting the core into the first bore and subsequently into the second bore with tension, creating a bullet containing the bullet body and core.

[ 013] The first bore and the second bore are formed such that the center axis of the first bore coincides with the longitudinal axis or center axis of the bullet body and the center axis of the second bore coincides with the longitudinal axis or center axis of the bullet body.

List of drawings

[014] The following drawings show, generally by way of example, various parts relating to the invention. [015] Fig. 1 illustrates a ball (10) with a cutout to show the bores (3; 5) and the core (2).

[016] Fig. 2 illustrates another embodiment of the ball (10) with a cutout to show the bores (3; 5), wherein the first bore (3) is larger in diameter than the second bore (5).

[017] Fig. 3 illustrates another embodiment of the ball (10).

Detailed presentation of examples of implementation of the invention

[018] Fig. 1 illustrates a bullet (10) comprising a bullet body (1) having an outer profile and a chamfered front (6). The ball body (1) is made of copper. The ball body (1) additionally contains a first bore (3) and a second bore (5). The first hole (3) is formed starting from the front part (6) of the ball body (1) and the center axis of the first hole (3) coincides with the center axis of the ball body (1). The second hole (5) is formed in the end surface of the first hole (3). The center axis of the second hole (5) coincides with the center axis of the first hole (3). The diameter (Dl) of the second bore (5) is smaller than the diameter (D2) of the first bore (3). The ball (10) additionally contains a tungsten carbide core (2) arranged in the first bore (3) and the second bore (5) in such a way that the core (2) is inserted into the second bore (5) by clamping. The core (2) itself is made of a carbide-type material, is cylindrical in shape and has a flat surface at both ends. The diameter (D3) of the core (2) is smaller than the diameter (D2) of the first bore (3) and larger than the diameter (Dl) of the second bore (5) in order to ensure alignment with tension. In addition, the length of the core (2) is shorter than the length of the two bores (3; 5) in such a way that the core (2) does not extend beyond the cut-off front part (6) of the bullet body (1) when the core (2) is inserted into the bores (3; 5) ). [019] Fig. 2 illustrates another embodiment of the ball (10) shown in Fig. 1, including production dimensions. The caliber of bullet (10) is .308 Win. In the proposed version, the diameter (D2) of the first hole (3) is 2.050 mm, the diameter (Dl) of the second hole (5) is 1.900 mm. Thus, the diameter (Dl) of the second hole (5) is smaller than the diameter (D2) of the first hole (3) by 0.15 mm. As a result, the holes (3; 5) are configured or drilled so that the core (2) (not shown in fig. 2 but visible in fig. 1 and 3) can be inserted through the first hole (3) into the second hole (5) with tension. The diameter (D3) of the core (2) to be inserted into the holes (3; 5) is 1.98 mm. Thus, the diameter (Dl) of the second hole (5) is smaller than the diameter (D3) of the core (2) by 0.02 mm. Since the core (2) is made of a harder material than the body (1) of the ball (10), the core (2) can be inserted into the second bore (5) with tension.

[020] Fig. 3 illustrates another embodiment of the armor-piercing bullet (10) for use in pistols, which uses the same principles as illustrated in Figs. 1 and 2. Bullets (10) are 180 grain weight and .357 caliber. In tests, this bullet had a maximum hit dispersion on target of less than 3 MOA. In penetration tests, the bullet (10) was able to penetrate a 5 mm thick metal plate with a Brinell hardness (HB) of 600 from a distance of 25 meters.

[021] Although the invention may be subject to various modifications and alternative forms, specific embodiments of which are shown by way of example in the drawings and described herein, it is to be understood that the invention is not intended to be limited to the embodiments specifically described herein. The invention includes all modifications, equivalents and alternatives covered by the scope of protection of the following claims.

Claims (7)

1. Ball (10) containing: a ball body (1) having an outer profile and a truncated front part (6), in addition, the ball body (1) contains: the first hole (3) formed from the front part (6) of the ball body (1) and the center axis of the first hole (3) coincides with the center axis of the ball body (1), the second hole (5) formed from the first hole (3) ) on the end surface, and the center axis of the second hole (5) coincides with the center axis of the first hole (3), moreover, the diameter (Dl) of the second hole (5) is smaller than the diameter (D2) of the first hole (3), core (2), located in the first hole (3) and the second hole (5), and the diameter (D3) of the core (2) is smaller than the diameter (D2) of the first hole (3) and larger than the diameter (Dl) of the second hole (5) in such a way that that the core (2) is inserted into the second bore (5) with tension, and furthermore the length of the core (2) is smaller than the length of the two bores (3;5) in such a way that the core (2) does not go behind the cut-off front part of the bullet body (1) (6). 2. Ball (10) according to claim 1, characterized in that the diameter (D1) of the second bore (5) is smaller than the diameter (D2) of the first bore (3) by 0.10 to 0.20 mm, preferably , 0.15 mm. 3. Ball (10) according to claim 1 or 2, characterized in that the diameter (Dl) of the second bore (5) is smaller than the diameter (D3) of the core (2) by 0.01 to 0.03 mm , preferably 0.02 mm 4. Ball (10) according to claim 1 or 2, characterized in that the end surfaces of both cores (2) are flat end surfaces. 5. A method for producing a ball (1) containing the following steps: - forming the ball body (1) by machining the outer profile of the ball body (1) and cutting a flat surface for the front part (6) of the ball body (1), - drilling the first hole (3) in the front part (6) of the ball body (1), moreover, the center axis of the first hole (3) coincides with the center axis of the ball body (1), - drilling the second hole (5) in the first hole (3) in such a way that the center axis of the first hole (3) coincides with the center axis of the second hole (5), moreover, the second hole (5) is drilled with a smaller diameter than the first hole (3) diameter; - providing the core (2) with a diameter smaller than the diameter of the first bore (3) and larger than the diameter of the second bore (5); and 6 LV 15696 - inserting the core (2) into the first bore (3) and then into the second bore (5) with tension, creating a ball (10) containing the ball body (1) and the core (2). 6. Method according to claim 5, characterized in that the diameter of the second hole (5) is drilled smaller than the diameter (D2) of the first hole (3) by 0.10 to 0.20, preferably 0.15 mm. 7. Method according to claim 5 or 6, characterized in that the diameter of the second hole (5) is drilled smaller than the diameter (D3) of the core (2) to be inserted by 0.01 to 0.03, preferably 0, 02 mm.