RU2807364C2 - Method for manufacturing box magazine for small arms - Google Patents

Abstract

FIELD: small arms.

SUBSTANCE: method for manufacturing a box magazine body for small arms, in which on the inner surfaces of the side walls of the magazine body, during milling, constructive protruding elements located opposite each other in the upper front inner part of the magazine body are made for the axial displacement of loaded cartridges and the gradual bringing of the centre line of the upper cartridges to the cartridge chambering line in the chamber.

EFFECT: increase of reliability of the weapon.

1 cl, 5 dwg

Description

The invention relates to methods for manufacturing a box magazine body for small arms, including pistols, in particular, to a method for manufacturing structural elements in the magazine body that facilitate the axial displacement of loaded cartridges and the gradual bringing of the center line of the upper cartridges to the line of chambering of the cartridge into the chamber.

According to the invention DE 573008 C [1] (patent notification date - March 9, 1933), a magazine is known, in particular for submachine guns, in which opposite ribs are provided in the front part of the magazine body and in the immediate vicinity of the rear wall , of which the rear pair of ribs protrudes less deeply into the store than the front pair of ribs, which, in addition to crossing and complete point rolling of the three or four upper cartridges, inevitably leads to the fact that the uppermost cartridge inevitably occupies a certain angle to the horizontal, i.e. to the cartridge feed line into the chamber.

According to the utility model RU 140957 U1 [2] (date of publication - May 20, 2014), a two-row small arms magazine is also known, containing a body with bends on the neck and with longitudinal guide extrusions on the side walls, characterized in that in the upper part of the side walls of the body behind the longitudinal guide extrusions there are additional longitudinal guide extrusions with smooth curved surfaces, the geometric shape of which satisfies certain parameters that ensure the position of the upper cartridge corresponding to the line of its sending into the chamber.

The problem that gunsmiths-designers face in practice is that when loading a large number of cartridges (usually 5 or more pieces) into a non-row magazine, the cartridges due to the resulting vectors of rolling friction forces when rolling a column of cartridges in a box-shaped case magazines occupy a position in which their center line tends to coincide with the line perpendicular to the rear wall of the magazine body in the lateral projection. Since the handles of pistols have a certain angle relative to the barrel, which usually coincides with the line of supply of cartridges to the chamber of the barrel, the above position of the cartridges in the box-shaped body does not coincide with the line of supply of cartridges to the chamber, which can cause all sorts of emergency situations during the operation of the weapon, i.e. . when chambering a cartridge: distortions, sticking, etc.

The general task of technical solutions [1] and [2] is not to align the entire column of cartridges relative to the feed line, but to ensure that the position of the center line of the top cartridge in the loaded magazine corresponds to the intended feed line of the cartridge into the chamber. To solve this problem, the minimum distance between the side walls in the upper front inner part of the magazine body is made smaller than the minimum distance between the side walls in the upper rear part of the magazine body using special extrusions or ribs in the upper part of the magazine body. This solution allows the upper cartridges, when rolling in the box magazine body from bottom to top, to gradually warp (cross) relative to each other in the transverse plane of the magazine body, perpendicular to the rear wall of the magazine body (i.e. when viewed from above the magazine) and change their position in the magazine in such a way in such a way that their center line again deviates from the line perpendicular to the rear wall of the magazine body and gradually, as it moves from bottom to top, reaches the line of supply of the cartridge into the chamber. The distortion of the cartridges and, as a consequence, their reverse alignment occurs due to the fact that the front parts of the upper cartridges are gradually brought together in the upper part of the magazine body, and their rear parts still remain apart, which gradually deflects the resulting rolling friction forces of the cartridges in the upper parts of the magazine body from a line perpendicular to the rear wall to the line of feeding the cartridge into the chamber.

An alternative method for manufacturing a magazine body is proposed by milling the internal cavity of the magazine in such a way that the minimum distance between the side walls in the upper front inner part of the magazine body will be less than the minimum distance between the side walls in the upper rear inner part of the magazine body. The method of manufacturing the magazine has the same technical result as the technical solutions [1] and [2], namely, ensuring that the position of the center line of the upper cartridge in the loaded magazine corresponds to the intended line of supply of the cartridge into the chamber, which ultimately affects the reliability of operation weapons.

A distinctive feature of the proposed technical solution is that the gradual warping of the cartridges in the upper part of the magazine body and their removal to the cartridge supply line into the chamber is ensured not by extrusions or ribs, but by leaving residual material in the upper front inner part of the magazine body when milling the internal cavity and finishing the shape the inner upper cavity of the magazine body to the required geometry.

The technical solution [1] is taken as the closest analogue.

General essential features:

a method for manufacturing a box magazine body for small arms, forming on the inner surfaces of the side walls of the magazine body protruding elements located oppositely in the upper front inner part of the magazine body.

Note. Using the example of technical solutions [1] and [2], constructive elements located oppositely should be understood as stamped extrusions or ribs known from the prior art. In the case of the proposed technical solution, constructive oppositely located elements should be understood as milled local surfaces with the features indicated below in the distinctive essential features.

Distinctive essential features:

first, on the side face of the magazine body blank, using an end mill, a pocket is milled with an extension in the lower part of the magazine body blank to insert a T-shaped cutter into and out of the internal cavity of the workpiece, and then, using a T-shaped cutter, partially mill the inner surfaces of the side walls the magazine body, leaving residual material in the upper front inner part of the magazine body;

before or after milling the said pocket on the side walls of the front upper inner part of the magazine body using a radius or spherical end mill, inserting it into the internal cavity of the magazine body from the front upper outer part of the magazine body, mill local surfaces so that they protrude into the body magazine relative to the internal surfaces of the side walls of the magazine body, which are formed when milling the internal cavity of the magazine with a T-shaped cutter in the above manner.

In fig. 1 shows in different views a one-and-a-half-row magazine for small arms in a state loaded with cartridges, without the manufacture of protruding elements in the magazine body that are oppositely located in the upper front inner part of the magazine body.

In fig. Figure 2 shows the stage of milling the body of a pocket magazine in a workpiece using a pocket end mill with an expansion of the pocket in the lower part of the workpiece for subsequent insertion of a T-shaped cutter into the internal cavity of the workpiece and removal from it.

In fig. Figure 3 shows the stage of partial milling using a T-shaped cutter of the internal surfaces of the side walls of the magazine body, leaving residual material in the upper front inner part of the magazine body.

In fig. Figure 4 shows the stage of milling on the side walls of the front upper inner part of the magazine body using a radius or spherical end mill of local surfaces protruding inside the magazine body relative to the internal surfaces of the side walls of the magazine body, which are formed when milling the internal cavity of the magazine with a T-shaped cutter.

In fig. 5 presents a one-and-a-half-row magazine for small arms in different forms, loaded with cartridges, demonstrating the technical result.

Explanation of symbols for figures:

1. store body,

2. cartridges,

3. a line perpendicular to the rear wall of the magazine body in the side projection of the magazine body,

4. center line of the upper chuck,

5. line for feeding the cartridge into the chamber (chambering line),

6. side face of the magazine body blank,

7. end mill, or radius end mill (with a tip radius less than half the diameter) mill,

8. pocket,

9. expansion of the pocket at the bottom of the magazine body blank,

10. T-shaped, also known as a fungal cutter,

11. internal surfaces of the side walls,

12. residual material in the upper front inner part of the magazine body,

13. spherical cutter,

14. local surfaces oppositely located on the inner surfaces of the side walls of the magazine,

15. rear parts of the upper penultimate cartridges,

16. front parts of the upper penultimate cartridges.

Cartridges 2 in Fig. 1 are placed in the body 1 of a one-and-a-half or two-row magazine in a checkerboard pattern with an axial displacement along the rear wall (when viewed from the front) relative to each other. In this case, due to the resulting vectors of rolling friction forces when forming a column of cartridges in the body 1, the center line of the cartridges 2 in the lateral projection tends to coincide with the line 3 perpendicular to the rear wall of the magazine body, as a result of which the center line 4 (Fig. 1) of the uppermost cartridge becomes non-parallel (deviates) from the line 5 (Fig. 1) pre-designed by the designer for feeding cartridges into the chamber, which, when sending a cartridge into the chamber during normal operation of the weapon, causes distortions and sticking of the cartridges.

To align the center line of the upper cartridge with the line of chambering of the cartridge into the chamber, first on the side face 6 (Fig. 2) of the magazine body blank, using an end mill 7, a pocket 8 is milled with an extension 9 in the lower part of the magazine body blank to insert a T-shaped cutter into the inner the cavity of the workpiece and the exit from it, and then using a T-shaped cutter 10 (Fig. 3) partially mill the inner surfaces 11 of the side walls of the magazine body 1, leaving residual material 12 in the upper front inner part of the magazine body. The cutter 10 is inserted and removed from the magazine body blank through extension 9 of pocket 8.

Fig. 4 gives an idea that in the process of manufacturing the magazine body using methods known from the prior art, before or after milling the pocket 8 (Fig. 2) on the side walls of the front upper inner part of the magazine body using the end 7, which is also the end radius (if there is a rounding radius edges at the top) or a spherical 13 cutter, inserting it into the internal cavity of the magazine body from the front upper outer part of the magazine body (position A of Fig. 4), mill local surfaces 14 oppositely located on the inner surfaces of the side walls of the magazine 1 in such a way that they protrude inside the magazine body 1 relative to the internal surfaces 11 of the side walls of the magazine body, which are formed when milling the internal cavity of the magazine with a T-shaped cutter 10.

Thus, in the magazine body, on the inner surfaces of the side walls of the magazine body, constructive protruding elements located oppositely in the upper front inner part of the magazine body 1 are formed, including surfaces 14 (Fig. 4), which results in the front parts 16 (Fig. 5) of the upper (penultimate) cartridges gradually in the upper part of the magazine body 1 are forcibly brought together in the direction of the inner part of the magazine body, while rising up above each other, while their rear parts 15 (Fig. 5) are still remain spread apart and do not rise synchronously with the front parts of the cartridges, which gradually deflects the resulting rolling friction forces of the cartridges in the upper part of the magazine body from a line perpendicular to the rear wall in a lateral view to the line of supply of the cartridge into the chamber, resulting in the center line 4 of the uppermost cartridge in a lateral view (position A of Fig. 5) is aligned (becomes parallel) with line 5 of chambering the cartridge into the chamber.

Explanations of the figures give an idea of how the invention is carried out and how it is related to the technical result.

At the production base of JSC TECHNOARMS, Moscow, which has a license for the development and production of civilian and service weapons, the magazines shown in Fig. 1 and Fig. 5 (i.e. both with and without protruding structural elements located inside the magazine body in the upper front part). These structural elements were manufactured using the method of the proposed technical solution. The magazine with the presence of the specified structural elements showed reliable operation during the development of the civilian pistol Groza-M1, caliber 9 mm R.A., namely, the absence of sticking and misalignment of cartridges when they are fed into the chamber during firing due to the deviation of the center line of the upper cartridge from lines for feeding the cartridge into the chamber of the barrel, including on a fully loaded 10-local one-and-a-half-row magazine. The first experimental sample of a store without the specified structural elements turned out to be inoperative.

Claims (1)

A method for manufacturing a box magazine body for small arms, forming on the inner surfaces of the side walls of the magazine body protruding elements that are oppositely located in the upper front inner part of the magazine body, characterized in that first a pocket is milled on the side face of the magazine body blank using an end mill to expand the pocket in the lower part of the magazine body blank to insert a T-shaped cutter into and out of the internal cavity of the workpiece, and then using the T-shaped cutter partially mill the inner surfaces of the side walls of the magazine body, leaving residual material in the upper front inner part of the magazine body , and also by the fact that before or after milling said pocket on the side walls of the front upper inner part of the magazine body using a radius or spherical end mill, inserting it into the internal cavity of the magazine body from the front upper outer part of the magazine body, milling local surfaces in this way that they protrude inside the magazine body relative to the inner surfaces of the side walls of the magazine body, which are formed when milling the internal cavity of the magazine with a T-shaped cutter in the above manner.