Self-positioning horizontal opening tightening tool suitable for small-caliber ammunition

Abstract

The utility model relates to a self-positioning horizontal type opening tightening tool suitable for small-caliber ammunition, and belongs to the weapon manufacturing technology. Comprising a pressing plate a (1), four positioning columns (2), four positioning plates a (3), positioning column springs (4), pressing block springs (5), four pressing blocks (6), a base (7), a positioning plate b (8) and a pressing plate b (9). The tool is simple in structure, all the parts are convenient to machine, assemble, disassemble and maintain in the later period, and the tool has the limiting function and the automatic alignment function between all the parts. Based on the superiority of the structure of the tool, the consistency of the opening tightening position and depth can be ensured; and moreover, the situation that the die is seriously worn due to inaccurate positions of all parts in the pressing process is avoided. The defects of a traditional small-caliber vertical opening tightening tool are fully overcome.

Description

Technical Field

[0001] The utility model relates to a self-positioning horizontal necking tooling applicable to small-caliber ammunition, belonging to the field of ordnance manufacturing technology. Background Art

[0002] The traditional vertical necking tooling for small-caliber ammunition. On the one hand, the structure is complex, the processing and assembly are difficult, and it is inconvenient to disassemble and maintain in the later stage; on the other hand, since the tooling itself requires not only a large number of components, but also a large number of auxiliary tools, such as: limit posts. The cooperation requirements between components are very high. During the necking process, there will be a situation where the tooling is severely worn due to the improper positions of the components, resulting in a poor final necking effect. Summary of the Invention

[0003] The self-positioning horizontal necking tooling for small-caliber ammunition of this utility model is used for necking at the connection between the small-caliber projectile and the cartridge case, so as to endow the projectile and the cartridge case with a certain extraction force and the function of sealing gunpowder gas. The effect of this device on small-caliber ammunition necking is extremely remarkable.

[0004] The technical solution of the utility model: a self-positioning horizontal necking tooling applicable to small-caliber ammunition, including a pressing plate a1, 4 positioning posts 2, 4 positioning plates a3, a positioning post spring 4, a pressing block spring 5, 4 pressing blocks 6, a base 7, a positioning plate b8, and a pressing plate b9; 4 pressing blocks 6 are assembled into a square and installed between the pressing plate a1 and the base 7, and the pressing block spring 5 is installed in the reserved holes formed between every two pressing blocks 6; the positioning plate b8 is installed on the base 7, one end of the pressing plate b9 is installed on the positioning plate b8, and the other end is fixed on the base 7. The upper end of the pressing plate a1 is a plate-like structure, with two mounting holes provided at each end. 4 positioning posts 2 are installed in the mounting holes, and a positioning post spring 4 is installed on each positioning post 2. 4 positioning plates a3 are respectively welded on both sides of the pressing plate a1 and the base 7.

[0005] The lower end of the pressing plate a1 is a V-shaped structure, and a funnel-shaped groove is provided in the middle, which is matched with one end of the combined part of 4 pressing blocks 6.

[0006] The positioning plate a3 is a rectangular plate-like structure, and the middle arc is the same as the shapes of the pressing plate a1 and the base 7.

[0007] The positioning post 2 is a columnar structure, and is in clearance fit with the pressing plate a1.

[0008] The pressing block 6 is a triangular structure, the top angle is processed into an arc, two protrusions are provided in the middle of the arc, and grooves are provided on one side of each of the two bottom angles. After the combination of 4 pressing blocks 6, a circular hole is formed in the middle, and the grooves between adjacent bottom angles form reserved holes.

[0009] The base 7: is a U-shaped structure, with a groove for matching with the combined part of the pressing blocks 6 provided on one side, and the other side serves as the support for the pressing plate b9.

[0010] The positioning plate b8 is in a plate-like structure, with a circular hole in the middle, corresponding to the circular hole in the middle after being combined with the 4 pressing blocks 6, and an installation hole for the pressing plate b9 is provided at the upper end.

[0011] The technical effects of the present utility model: The present utility model not only has a simple structure, and each component is convenient for processing, assembly, disassembly and later maintenance, but also the tooling itself has a self-limiting function and an automatic alignment function between each component. Based on the superiority of the structure of the tooling itself, it can not only ensure the consistency of the position and depth of the tight mouth, but also does not worry about the serious wear of the mold caused by the inaccurate position of each component during the pressing process. This also fully makes up for the deficiencies of the traditional small-caliber vertical tight mouth tooling. Description of the Drawings

[0012] Figure 1 Top view a and front view cross-section b of the pressing plate a1.

[0013] Figure 2 Schematic diagram of the positioning column 2.

[0014] Figure 3 Schematic diagram of the positioning plate a3.

[0015] Figure 4 Schematic diagram after assembling the 4 pressing blocks 6.

[0016] Figure 5 Top view a, side views b and c of the adjacent sides of the base 7.

[0017] Figure 6 Front view a and side view b of the positioning plate b8.

[0018] Figure 7 Front view a, side view b and top view c of the overall assembly of a self-positioning horizontal tight mouth tooling applicable to small-caliber ammunition.

[0019] Wherein: 1 - pressing plate a, 2 - positioning column, 3 - positioning plate a, 4 - positioning column spring, 5 - pressing block spring, 6 - pressing block, 7 - base, 8 - positioning plate b, 9 - pressing plate b, 10 - fixing pin. Detailed Implementation Manner

[0020] The present utility model will be further described below with reference to the drawings:

[0021] A self-positioning horizontal tight mouth tooling applicable to small-caliber ammunition is used for tight mouth at the connection between a small-caliber projectile and a cartridge case, so as to endow the projectile and the cartridge case with a certain pulling force and the function of sealing gunpowder gas. The effect of tight mouth of this device on small-caliber ammunition is extremely remarkable.

[0022] A self - positioning horizontal necking tooling suitable for small - caliber ammunition, comprising a pressing plate a1, 4 positioning columns 2, 4 positioning plates a3, a positioning column spring 4, a pressing block spring 5, 4 pressing blocks 6, a base 7, a positioning plate b8, and a pressing plate b9; The 4 pressing blocks 6 are assembled into a square and installed between the pressing plate a1 and the base 7, and the pressing block spring 5 is installed in the reserved holes formed between every two pressing blocks 6; The positioning plate b8 is installed on the base 7, one end of the pressing plate b9 is installed on the positioning plate b8, and the other end is fixed on the base 7. The upper end of the pressing plate a1 is a plate - like structure, with two mounting holes at each end. The 4 positioning columns 2 are installed in the mounting holes, and a positioning column spring 4 is installed on each positioning column 2. The 4 positioning plates a3 are respectively welded on both sides of the pressing plate a1 and the base 7. As follows Figure 7 shown. The functions of each part are as follows:

[0023] Pressing plate a1: The lower end is a V - shaped structure, and there is a funnel - shaped groove in the middle, which cooperates with one end of the assembly of 4 pressing blocks 6; It is made of medium - carbon low - alloy steel by first drilling, and then processed by heat treatment wire cutting, milling the groove, etc. As follows Figure 1 shown. The processed groove and holes cooperate with the pressing block 6 and the positioning column 2. Its function is to position and align the pressing block 6, preventing the situation of incorrect pressing block position during the action of the press, which may lead to inconsistent necking position and depth.

[0024] The positioning column 2 is a columnar structure, with a clearance fit with the pressing plate a1. It is made of medium - carbon low - alloy steel by heat treatment turning processing. As follows Figure 2 shown. In the horizontal necking device, there are not only 4 positioning columns, but also the functions of the 4 positioning columns are the same. They all cooperate with the pressing plate 1, the positioning column spring 4, and the base 7. Its function is to position the pressing plate 1. When the pressing block moves downward, due to the positioning of the positioning column, the pressing plate can only move along the axial direction of the positioning column. This directly ensures the consistency of the necking position and depth after pressing.

[0025] The positioning plate a3 is a rectangular plate - like structure, with an arc in the middle that is the same as the shapes of the pressing plate a1 and the base 7. It is made of medium - carbon low - alloy steel by heat treatment wire cutting processing. As follows Figure 3 shown. There are 4 positioning plates a3 in the horizontal necking device. They are respectively connected to the pressing plate 1 and the base 7 through welding and connecting pins. Its function is to prevent the axial movement of the pressing block during the pressing process.

[0026] The positioning column spring 4: Its function is to support the pressing plate 1. When the press releases pressure, the positioning column spring starts to act, axially supporting the pressing plate 1 until the pressing plate returns to its initial position.

[0027] The pressing block spring 5: It is assembled between the pressing blocks 6 and plays a role in supporting the pressing blocks. It ensures that after the press releases pressure, the pressing blocks are smoothly supported radially.

[0028] The briquette 6 is of a triangular structure, with its top angle processed into an arc shape. There are two protrusions in the middle of the arc, and grooves are provided on one side of each of the two bottom angles. After 4 briquettes 6 are combined, a circular hole is formed in the middle, and the grooves of adjacent bottom angles form reserved holes. It is made by drilling medium-carbon low-alloy steel and then through heat treatment and wire cutting, as follows Figure 4 shown. The horizontal tightening device includes 4 briquettes, which cooperate with the pressing plate a1, the briquette spring 5, and the base 7 respectively. The diameter size when the briquettes are tightened, the misalignment size between the briquettes, and the width and height of the convex grooves will directly affect the tightening position and depth, as well as the pulling force of the formed bullet and the tightness of the gunpowder gas, etc.

[0029] The base 7 is of a U-shaped structure, with a groove on one side for cooperating with the briquette 6 assembly, and the other side serves as the support for the pressing plate b9. It is made by drilling medium-carbon low-alloy steel and then through heat treatment, wire cutting, and vertical milling, as follows Figure 5 shown. Its main function is to act as a bridge for other components.

[0030] The positioning plate b8 is of a plate-like structure, with a circular hole in the middle corresponding to the circular hole in the middle after 4 briquettes 6 are combined, and an installation hole for the pressing plate b9 is provided at the upper end. It is made by heat treatment of medium-carbon low-alloy steel and then through wire cutting, as follows Figure 6 shown. It is welded to the base 7, and its function is to position the bottom of the cartridge case to prevent the bottom from tilting when the tightening part is stressed during the tightening process.

[0031] The pressing plate b9: It is made by heat treatment of medium-carbon low-alloy steel and then through wire cutting. Its main function is to press the positioning plate b8, so as to prevent the bottom from tilting when the tightening part is stressed during the tightening process.

[0032] The fixing pin 10: It is made by heat treatment of medium-carbon low-alloy steel and then through turning. Its main function is to fix the pressing plate b9, so as to ensure the consistency of the tightening position and depth when the tightening tooling works.

[0033] The working process of this tooling:

[0034] During the initial stage of pressing, it is necessary to adjust the pressure value of the press and position the cartridge bottom groove at the predetermined position on the positioning plate b8. Then, use the pressing plate b9 and the fixing pin 10 to fix the bottom of the cartridge, and the necking operation can be carried out. After completing the preliminary work, start the press, and the press directly acts on the upper end face of the pressing plate b9. At this time, the 4-piece pressing block 6 assembly starts to automatically align under the action of the pressing plate a1, the base 7, the positioning plate a3, and the pressing block spring 5. Subsequently, the 4-piece pressing block 6 assembly starts to hold tightly and will directly act on the necking part of the cartridge this time. When the 4-piece pressing block 6 assembly is completely tightened to the set inner diameter size, the descending height of the press is restricted by the pressing block, which is the so-called "limit" function. When the pressing is completed, the press releases the pressure. At this time, the positioning column spring 4 and the pressing block spring 5 start to act, supporting the pressing plate a1 and the pressing block 6 respectively, and then unloading the pressing plate b9 and the fixing pin 10, and the formed cartridge after necking can be unloaded. This process is the working process of the necking tooling. This process is extremely convenient, takes a short time, and the necking and opening effects are also extremely remarkable.

Claims

1. A self-positioning horizontal tightening tool suitable for small-caliber ammunition, characterized in that: The invention comprises a pressing plate a (1), four positioning columns (2), four positioning plates a (3), a positioning column spring (4), a pressure block spring (5), four pressure blocks (6), a base (7), a positioning plate b (8), and a pressing plate b (9); the four pressure blocks (6) are combined into a square and installed between the pressing plate a (1) and the base (7); the pressure block spring (5) is installed in a reserved hole formed by every two pressure blocks (6); the positioning plate b8 is installed on the base (7); one end of the pressing plate b (9) is installed on the positioning plate b (8) and the other end is fixed on the base (7); the upper end of the pressing plate a (1) is a plate-shaped structure, and two mounting holes are respectively provided at both ends; the four positioning columns (2) are installed in the mounting holes; a positioning column spring (4) is installed on each positioning column (2); and the four positioning plates a (3) are respectively welded to both sides of the pressing plate a (1) and the base (7).

2. The self-positioning horizontal tightening tool suitable for small-caliber ammunition according to claim 1, characterized in that: The lower end of the pressing plate a (1) is a V-shaped structure, which cooperates with one end of the assembly of four pressing blocks (6).

3. The self-positioning horizontal tightening tool suitable for small-caliber ammunition according to claim 1, characterized in that: The positioning plate a (3) is a rectangular plate-shaped structure, and the arc shape in the middle is consistent with the shape of the pressing plate a (1) and the base (7).

4. The self-positioning horizontal tightening tool for small-caliber ammunition according to claim 1, characterized in that: The positioning column (2) is a columnar structure and is clearance-matched with the pressing plate a (1).

5. The self-positioning horizontal tightening tool suitable for small-caliber ammunition according to claim 1, characterized in that: The pressing block (6) is a triangular structure, the top corner is processed into an arc shape, two protrusions are provided in the middle of the arc, and grooves are provided on one side of the two bottom corners. After the four pressing blocks (6) are combined, the middle part is a circular hole, and the grooves of each adjacent bottom corner form a reserved hole.

6. The self-positioning horizontal tightening tool for small-caliber ammunition according to claim 1, characterized in that: The base (7) is a U-shaped structure, one side of which is provided with a groove for matching with the pressure block (6) assembly, and the other side serves as a support for the pressure plate b (9).

7. The self-positioning horizontal tightening tool for small-caliber ammunition according to claim 1, characterized in that: The positioning plate b (8) is a plate-like structure with a circular hole in the middle corresponding to the circular hole in the middle of the four pressing blocks (6) after assembly, and a mounting hole for the pressing plate b (9) is provided at the upper end.

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