Tool for drilling gun barrel seat of AK series rifle

Abstract

A tool for drilling gun barrel seats of AK series rifles comprises a base, a positioning body and a clamping mechanism. The key point is that the positioning main body comprises a base, a left positioning block and a right positioning block; the base is arranged on the base and is used for fixing the left positioning block and the right positioning block; the clamping mechanism comprises a clamping rod, a guide plate and an air cylinder; the guide plate is installed on the base, the air cylinder is installed on the guide plate, the clamping rod is fixed to the air cylinder, and the clamping block is installed on the clamping rod and used for clamping a workpiece. The clamping block is provided with two clamping arms, the included angle between the two clamping arms ranges from 86 degrees to 87 degrees, the two clamping arms make contact with the top face and the right side face of the gun barrel base respectively, when one clamping arm makes contact firstly, the clamping block rotates around the pin shaft, the other clamping arm makes contact with the gun barrel base, and clamping is completed. By changing the clamping principle and replacing manual clamping with pneumatic clamping, the clamping time is remarkably shortened, the manpower loss during clamping is reduced, and the production efficiency is improved on the premise of ensuring simple and convenient operation. The overall structure is simple and convenient to maintain.

Description

Technical Field

[0001] This utility model patent relates to the field of firearms production, in particular to a tool for drilling the barrel seat of AK series rifles. Background Art

[0002] Barrel seat 8 Figure 1-3 As shown, it is an important part used to connect the barrel and the main body of the AK series rifle. The barrel is installed on the barrel seat, and the barrel seat is installed on the main body. The barrel hole on the barrel seat is the mounting hole of the barrel. The positioning surfaces related to the processing of drilling the barrel hole 87 of the barrel seat 8 include the left positioning shoulder 81, the right positioning shoulder 82, the rear end face 83, and the left side face 84. The clamping surfaces include the right side 85 and the top face 86. The processed part is the barrel hole 87.

[0003] The tooling for drilling the barrel hole 87 of the existing barrel seat 8 is as follows: Figure 4 、 5 As shown, it includes a base 1, a positioning body and a clamping mechanism. The base 1 is used to install the positioning body and clamping mechanism of the fixture, and is also used to fix the tooling on the workbench of the processing equipment; the positioning body includes a main seat 11, a left positioning block 3 and a right positioning block 4; the main seat 11 is installed on the base, and the left positioning block 3 and the right positioning block 4 and the guide rail 9 are fixed on the main seat 11; the left positioning block 3 and the right positioning block 4 are used to position the workpiece, and have left and right side positioning surfaces, left and right front positioning surfaces, and left and right upper positioning surfaces respectively, among which the left positioning block 3 is the main positioning block and the right positioning block 4 is the auxiliary positioning block; the clamping mechanism is manual clamping, and a manual clamping rod 10 is installed on the guide rail 9, and a clamping head 64 and a clamping block 61 are installed on the manual clamping rod 10.

[0004] Its usage status is as follows Figure 6 As shown, to clamp the barrel holder 8 using the fixture, the barrel holder 8 must first be placed between the left and right positioning blocks 3 and 4, ensuring that the barrel holder's left and right positioning shoulders 81 and 82 are in close contact with the left and right front positioning surfaces of the left and right positioning blocks, respectively, and that the barrel holder's left side 84 is in close contact with the left positioning surface. The user then grasps the rear end of the manual clamping rod 10 and rotates it. The guide rail 9 and the clamping head 64 cooperate to prevent the clamping block 61 from rotating. The guide rail 9 and the manual clamping rod 10 form a screw-nut assembly, converting the rotation of the manual clamping rod 10 into linear movement until the barrel holder 8 is clamped, completing the clamping. Although this fixture is extremely simple and convenient to operate, the manual clamping rod 10 requires manual rotation, which is time-consuming and labor-intensive, resulting in low clamping efficiency and low production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a tool for drilling the barrel seat of AK series rifles, which is reliable in use, simple in structure, easy to operate and can effectively improve production efficiency.

[0006] The technical solution adopted by the utility model is a tool for drilling the barrel seat of AK series rifles, which comprises a base, a positioning body and a clamping mechanism; the key points are that the positioning body comprises a base, a left positioning block and a right positioning block; the base is installed on the base and is used to fix the left positioning block and the right positioning block; the clamping mechanism comprises a clamping rod, a guide plate and a cylinder; the guide plate is installed on the base, the cylinder is installed on the guide plate, the clamping rod is fixed on the cylinder, and the clamping rod is equipped with a clamping block for clamping a workpiece.

[0007] The utility model is an improvement on the existing tooling for drilling barrel seats for AK series rifles, retaining the basic structure of the base and the positioning body, changing the clamping principle of the clamping mechanism to change manual clamping into pneumatic clamping to reduce the operator's time and manpower loss in clamping the barrel seat and improve production efficiency. At the same time, compared with the main seat, the structure of the base is also changed, and the structure connected to the guide rail is omitted.

[0008] The left positioning block is the main positioning block, and the right positioning block is the auxiliary positioning block.

[0009] The left locating block has two stepped holes and two light holes on the fixed surface for installing bolts and locating pins, and the left locating block is installed on the base. The left locating block also has a left front locating surface slightly higher than the fixed surface, and the right side is the left locating surface that matches the side shape of the barrel seat. The lower part of the left locating surface has a protruding step for the upper left locating surface that matches the side shape of the barrel seat and matches the left side of the barrel seat. The left front locating surface fits with the left locating shoulder of the barrel seat, the upper left locating surface fits with the rear end face of the barrel seat, and the left locating surface fits with the left side of the barrel seat; the right locating block has two stepped holes and two light holes on the fixed surface for installing bolts and locating pins, and the right locating block is installed on the base. The right locating block also has a right front locating surface slightly higher than the fixed surface, and the left side is the right locating surface; the lower part of the right locating surface has a protruding step for the upper right locating surface, and the right locating surface matches with the right side of the barrel seat. When clamping the barrel seat, the right front locating surface fits with the right locating shoulder of the barrel seat, and the upper right locating surface fits with the rear end face of the barrel seat.

[0010] The distance between the left positioning surface and the right positioning surface is larger than the distance between the left and right sides of the barrel seat. When clamping the workpiece, the right positioning surface plays an auxiliary positioning role. After clamping is completed, there is a gap between it and the right side of the barrel seat.

[0011] A groove is opened in the middle of the left and right positioning surfaces to reduce the positioning surface area. A clearance groove is also set on the right positioning surface to make room for the clamping block to move. The height of the guide hole for installing the clamping rod on the guide plate is adapted to the height of the clearance groove.

[0012] The left front positioning surface on the left positioning block and the right front positioning surface on the right positioning block are on the same plane, and the upper left positioning surface and the upper right positioning surface are on the same plane.

[0013] One end of the clamping rod is a clamping head, which is hinged to the clamping block through a pin and rotates relative to the clamping head. The other end is a guide shaft, which cooperates with the guide hole in the guide plate to guide the movement of the clamping rod. A directional groove is formed on the guide shaft, which cooperates with the set screw installed in the directional hole to ensure that the clamping rod does not rotate when it moves. The external thread at the tail end of the clamping rod is used to mount the clamping rod on the piston rod of the cylinder.

[0014] The clamping block has two clamping arms, and the angle between the two arms is between 86-87 degrees, so as to ensure that there is no interference with other parts of the barrel seat when contacting the vertical top and right sides of the barrel seat. At the same time, the contact surface with the barrel seat is a curved surface. When clamping the workpiece, the two curved surfaces of the clamping block contact the top and right sides of the barrel seat respectively. If one curved surface contacts first, the clamping block will rotate around the pin shaft and allow the other curved surface to contact the barrel seat to complete the clamping.

[0015] The beneficial effects of this utility model are: by changing the clamping principle, replacing manual clamping with pneumatic clamping, while ensuring easy operation, it significantly reduces clamping time and manpower loss during clamping, thereby improving production efficiency. The overall structure is simple and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The main view of the barrel seat structure

[0017] Figure 2 Rear view of the barrel mount

[0018] Figure 3 Left side view of the barrel mount

[0019] Figure 4 Schematic diagram of the clamping state of the existing tooling

[0020] Figure 5 Schematic diagram of the loosened state of the existing tooling

[0021] Figure 6 Schematic diagram of the usage status of existing tooling

[0022] Figure 7 This is the structural diagram of this utility model patent

[0023] Figure 8 This is a schematic diagram of the structure of the base of this utility model patent

[0024] Figure 9 This is a schematic diagram of the structure of the left positioning block of this utility model patent

[0025] Figure 10 This is a schematic diagram of the structure of the right positioning block of this utility model patent

[0026] Figure 11This is a schematic diagram of the structure of the guide plate of this utility model patent

[0027] Figure 12 This is a schematic diagram of the structure of the clamping rod of this utility model patent

[0028] Figure 13 This is a schematic diagram of the use status of the utility model

[0029] Figure 14 This is a schematic diagram of the clamping completion state of the utility model

[0030] Wherein: 1 base 2 base 3 left positioning block 31 left front positioning surface 32 upper left positioning surface 33 left positioning surface 4 right positioning block 41 right front positioning surface 42 upper right positioning surface 43 right positioning surface 44 give way groove 5 guide plate 51 directional hole 52 guide hole 6 clamping rod 61 clamping block 62 guide shaft 63 directional groove 64 clamping head 7 cylinder 8 barrel seat 81 left positioning shoulder 82 right positioning shoulder 83 rear end surface 84 left side 85 right side 86 top surface 87 barrel hole 9 guide rail 10 manual clamping rod 11 main seat. DETAILED DESCRIPTION

[0031] The following is a detailed description of the present invention in conjunction with the accompanying drawings. The following examples will help those skilled in the art better understand the present invention, but are not intended to limit the present invention in any way. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended only to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connected" should be understood broadly. For example, they can mean fixed connection, detachable connection, or integral connection; they can mean mechanical connection, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] like Figure 7-12 As shown, the utility model is a tool for drilling the barrel seat of AK series rifles, which is used to clamp Figure 1-3The barrel mount shown is an improvement on existing tooling, consisting of a base, a positioning body, and a clamping mechanism. While retaining the basic structure of base 1 and the positioning body, the clamping mechanism's clamping principle has been modified, replacing manual clamping with pneumatic clamping. The positioning body comprises a base 2, a left positioning block 3, and a right positioning block 4. Base 2 is mounted on base 1 and serves to secure left and right positioning blocks 3 and 4, with left positioning block 3 serving as the primary positioning block and right positioning block 4 serving as the auxiliary positioning block. The clamping mechanism comprises a clamping rod 6, a guide plate 5, and a cylinder 7. Guide plate 5 is mounted on base 1, and cylinder 7 is mounted on guide plate 5. Clamping rod 6 is secured to cylinder 7, and clamping rod 6 is equipped with a clamping block 61 for clamping the workpiece.

[0033] like Figure 7 As shown, the base 1 is consistent with the original tooling, which is only a flat plate for fixing the base and the guide plate. The difference is that the guide plate 5 is added to the fixed fixture parts, and the corresponding screw hole positions are increased.

[0034] like Figure 8 The figure shows the structure of the base 2. The base 2 is mounted on the base 1 and is in a sideways "U" shape. There are two threaded holes and pin holes on the left and right sides of the middle recess for mounting the left positioning block 3 and the right positioning block 4.

[0035] like Figure 9 The figure shows the structure of the left locating block 3. The left locating block 3 has two stepped holes and two clear holes for mounting bolts and locating pins, securing the left locating block 3 to the base 2. The left locating block 3 also has a left front locating surface 31 that is slightly higher than the fixed surface and has a higher machining accuracy. This slightly higher height, typically between 0.5 and 2 mm, is compared to the fixed surface. The right side of the left locating surface 33 is aligned with the side profile of the barrel mount. A protruding step below the left locating surface 33 serves as an upper left locating surface 32 that aligns with the side profile of the barrel mount and aligns with the left side of the barrel mount, ensuring precise positioning. When the barrel mount 8 is mounted, the left locating block 3 plays a primary positioning role. The left front locating surface 31 aligns with the left locating shoulder 81 of the barrel mount, the upper left locating surface 32 aligns with the rear end face 83 of the barrel mount, and the left locating surface 33 aligns with the left side face 84 of the barrel mount. A groove is inserted in the center of the left locating surface 33 to reduce the locating surface area and reduce machining difficulty.

[0036] like Figure 10The figure shows the structure of the right locating block 4. The right locating block's fixed surface has two stepped holes and two clear holes for mounting bolts and locating pins, allowing the right locating block 4 to be mounted on the base 2. The right locating block 4 also has a right front locating surface 41 that is slightly higher than the fixed surface. This slight elevation, typically between 0.5 and 2 mm, is accompanied by a right locating surface 43 on its left side. A protruding step below the right locating surface 43 serves as an upper right locating surface 42. The left side of the right locating surface 43 aligns with the right side of the barrel mount. When clamping the barrel mount 8, the right locating block 4 assists in positioning. The right front locating surface 41 aligns with the right locating shoulder 82 of the barrel mount, while the upper right locating surface 42 aligns with the rear end face 83 of the barrel mount. To facilitate workpiece placement during clamping, the distance between the left locating surface 33 and the right locating surface 43 is slightly greater than the distance between the left and right sides of the barrel mount. This assists in positioning the workpiece during clamping, leaving a gap between the right locating surface 43 and the right side face 85 of the barrel mount after clamping. The right side positioning surface 43 is slotted in the middle to reduce the positioning surface area, thereby reducing the processing difficulty. At the same time, a clearance groove 44 is added compared to the left positioning block 3 to make room for the clamping block 61 to move.

[0037] To ensure accurate positioning of barrel mount 8, the left front positioning surface 31 of left positioning block 3 and the right front positioning surface 41 of right positioning block 4 are coplanar, and the upper left positioning surface 32 and the upper right positioning surface 42 are coplanar. The distance between the left positioning surface 33 of the left positioning block and the right positioning surface 43 of the right positioning block matches the distance between the left side 84 and right side 85 of the barrel mount to ensure effective fixture positioning.

[0038] like Figure 11 Figure 2 shows the structure of the guide plate 5. The guide plate 5 is mounted on the base 1. Its front face has four stepped holes for securing the cylinder 7 mounted on the rear face. Its upper face has an oriented hole 51 for receiving a set screw to prevent the clamping rod 6 from rotating during workpiece clamping. The guide plate 5 also has a guide hole 52, which guides the movement of the clamping rod 6. To ensure that the clamping rod 6 does not interfere with the right positioning block 4 during movement, the height of the guide hole 52 is aligned with the height of the clearance slot 44.

[0039] like Figure 12Figure 2 shows the structure of the clamping rod 6. One end of the clamping rod 6 is a clamping head 64, which is hinged to the clamping block 61 via a pin and can rotate relative to the clamping head 64. The other end is a guide shaft 62, although the clamping head 64 and guide shaft 62 can also be integrally formed. The guide shaft 62 engages with the guide hole 52 of the guide plate to guide the movement of the clamping rod 6. A guide groove 63 is formed in the guide shaft 62, which engages with a set screw installed in the guide hole 51 to prevent the clamping rod from rotating during movement. The external thread at the rear end of the clamping rod 6 is used to mount the clamping rod 6 to the piston rod of the cylinder 7. The clamping block 61 has two clamping arms, with the included angle slightly less than 90 degrees, typically between 86 and 87 degrees. This ensures that contact with the vertical barrel mount top surface 86 and right side surface 85 does not interfere with other parts of the barrel mount. Furthermore, the contact surface with the barrel mount 8 is a curved surface, ensuring linear contact between the clamping block 61 and the barrel mount 8, reducing machining complexity and ensuring effective clamping. When clamping a workpiece, the two curved surfaces of the clamping block 61 contact the top surface 86 and right side surface 85 of the barrel mount 8, respectively. If one curved surface contacts first, the clamping block 61 rotates about the pin, allowing the other curved surface to contact the barrel mount 8, completing the clamping.

[0040] like Figure 13 、 14 As shown in FIG, it is a schematic diagram of the state of clamping the barrel seat and a schematic diagram of the state of clamping completion. First, the positioning of the barrel seat 8 is as shown. Figure 13 As shown, first, press the left side 84 to the left positioning surface 33, the rear end surface 83 to the upper left positioning surface 32 and the upper right positioning surface 42, the left positioning shoulder 81 to the left front positioning surface 31, and the right positioning shoulder 82 to the right front positioning surface 41, and place the barrel seat 8 on the positioning block, and make the corresponding positioning surfaces close to each other; then clamp the barrel seat 8, start the cylinder 7, and the piston rod of the cylinder 7 moves forward, driving the clamping rod to move forward until the clamping block 61 contacts the top surface 86 and the right side surface 85 of the barrel seat 8, and the clamping is completed. The state of the clamp after clamping is completed is shown as follows. Figure 14 shown.

Claims

1. A tool for drilling the barrel seat of an AK series rifle, comprising a base (1), a positioning body and a clamping mechanism, characterized in that The positioning body comprises a base (2), a left positioning block (3) and a right positioning block (4); the base (2) is mounted on the base (1) and is used to fix the left positioning block (3) and the right positioning block (4); the clamping mechanism comprises a clamping rod (6), a guide plate (5) and a cylinder (7); the guide plate (5) is mounted on the base (1), the cylinder (7) is mounted on the guide plate (5), the clamping rod (6) is fixed on the cylinder (7), and the clamping rod (6) is equipped with a clamping block (61) for clamping a workpiece.

2. The tool for drilling the barrel seat (8) of an AK series rifle according to claim 1, characterized in that: The left positioning block (3) is a main positioning block, and the right positioning block (4) is an auxiliary positioning block.

3. The tool for drilling the barrel mount of an AK series rifle according to claim 2, characterized in that: There are two stepped holes and two light holes on the fixed surface of the left positioning block for installing bolts and positioning pins. The left positioning block (3) is installed on the base (2). There is also a left front positioning surface (31) slightly higher than the fixed surface on the left positioning block (3). The right side is the left positioning surface (33) that matches the side shape of the barrel seat. There is a protruding step at the lower part of the left positioning surface (33) that matches the side shape of the barrel seat and matches the left side of the barrel seat. The left front positioning surface (31) fits with the left positioning shoulder (81) of the barrel seat, the left upper positioning surface (32) fits with the rear end surface (83) of the barrel seat, and the left positioning surface (33) fits with the left positioning shoulder (81) of the barrel seat. The left side (84) of the barrel seat fits in; there are two stepped holes and two light holes on the fixed surface of the right positioning block for installing bolts and positioning pins, and the right positioning block (4) is installed on the base (2). The right positioning block (4) also has a right front positioning surface (41) slightly higher than the fixed surface, and the left side is the right positioning surface (43); the lower part of the right positioning surface (43) has a protruding step as the right upper positioning surface (42), and the right positioning surface (43) fits in with the right side of the barrel seat. When the barrel seat (8) is clamped, the right front positioning surface (41) fits in with the right positioning shoulder (82) of the barrel seat, and the right upper positioning surface (42) fits in with the rear end surface (83) of the barrel seat.

4. The tool for drilling the barrel mount of an AK series rifle according to claim 3, characterized in that: The distance between the left positioning surface (33) and the right positioning surface (43) is larger than the distance between the left and right sides of the barrel seat. When clamping the workpiece, the right positioning surface (43) plays an auxiliary positioning role. After clamping is completed, there is a gap between the right side surface (85) of the barrel seat.

5. The tool for drilling the barrel mount of an AK series rifle according to claim 3, characterized in that: The left positioning surface (33) and the right positioning surface (43) are grooved in the middle to reduce the positioning surface area. The right positioning surface (43) is also provided with a clearance groove (44) to make room for the clamping block (61) to move. The height of the guide hole (52) on the guide plate (5) for mounting the clamping rod (6) is adapted to the height of the clearance groove (44).

6. The tool for drilling the barrel mount of an AK series rifle according to claim 3, characterized in that: The left front positioning surface (31) on the left positioning block (3) and the right front positioning surface (41) on the right positioning block (4) are on the same plane, and the left upper positioning surface (32) and the right upper positioning surface (42) are on the same plane.

7. The tool for drilling the barrel mount of an AK series rifle according to claim 1, characterized in that: One end of the clamping rod (6) is a clamping head (64), which is hinged to the clamping block (61) through a pin and rotates relative to the clamping head (64). The other end is a guide shaft (62). The guide shaft (62) cooperates with the guide hole (52) in the guide plate to guide the movement of the clamping rod (6). A directional groove (63) is formed on the guide shaft (62), which cooperates with the set screw installed in the directional hole (51) to ensure that the clamping rod does not rotate when it moves. The external thread at the tail end of the clamping rod (6) is used to mount the clamping rod (6) on the piston rod of the cylinder (7).

8. The tool for drilling the barrel mount of an AK series rifle according to claim 7, characterized in that: The clamping block (61) has two clamping arms, and the angle between the two arms is between 86 and 87 degrees, so as to ensure that when contacting the vertical top surface (86) and the right side surface (85) of the barrel seat, there is no interference with other parts of the barrel seat. At the same time, the contact surface with the barrel seat (8) is a curved surface. When clamping the workpiece, the two curved surfaces of the clamping block (61) contact the top surface (86) and the right side surface (85) of the barrel seat (8) respectively. If one curved surface contacts first, the clamping block (61) will rotate around the pin shaft and allow the other curved surface to contact the barrel seat (8) to complete the clamping.

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