Impact test rig for attached systems mounted on small arms

Abstract

FIELD: test equipment.SUBSTANCE: impact test rig for attached systems mounted on small arms includes a frame on which at least one pneumatic cylinder with a control system and compressed air supply is installed, as well as an impact attachment installed on the pneumatic cylinder rod, a system for supplying compressed air to the pneumatic cylinders, a control system, and a system for measuring the parameters of the impact movement. Additionally, it comprises a mechanism that simulates the movement of the bolt carrier, comprising at least one post to which one pneumatic cylinder is attached; one drive lever and one platform, inside which there is a through hole and a hollow blind hole, where the rod is installed and secured.EFFECT: increase in the reliability of the reproduced impact load on any type of mounted systems installed on small arms.13 cl, 9 dwg

Description

[0001] 1. Field of technology to which the invention relates

[0002] The invention relates to testing equipment and can be used for testing high-intensity impact effects of any types of mounted systems installed on small arms (sights, attachments, night vision devices, modules, lights, handles, silencers, etc.), with the maximum degree of approximation to real conditions under which a shot is simulated, including recoil and the movement of the bolt carrier, the invention can also be used to conduct resource tests of mounted systems installed on small arms.

[0003] 2. State of the Art

[0004] A test rig is known from the prior art that simulates an impact similar to that which occurs when firing a small arms (US Patent US 8,166,797 B2 dated May 1, 2012, authors: Gregory G. Mooty, Austin, TX (US), James E. Fitzpatrick, Austin, TX (US), Timothy D. Honker, Austin, TX (US), Philip J. Izzi, Round Rock, TX (US), Eric C. Segerstrom, Austin, TX (US)), which is the closest analogue (prototype) of the claimed invention.

[0005] The test rig according to US patent 8,166,797 B2 from May 1, 2012 is a small arms body, which is fixed to the frame using cable vibration isolators, a shot imitation system, including recoil, a system for measuring and controlling the parameters of the specified shock loads for the test rig.

[0006] The main disadvantages of such a test bench include:

[0007] the need to use a real small arms body to conduct impact tests (for each type of small arms, it is necessary to establish a specific brand of gun body);

[0008] The impact test bench does not take into account the process of the bolt carrier movement that occurs during actual shooting of a small arms.

[0009] 3. Disclosure of the essence of the invention

[0010] The technical problem solved by the invention is to develop a rig for impact testing of mounted systems installed on small arms with the maximum degree of approximation to the real conditions under which the process of firing, recoil and movement of the bolt carrier of a small arm occurs.

[0011] The technical result is to increase the reliability of the reproducible impact load on any type of mounted systems installed on small arms (sights, attachments, night vision devices, modules, lights, grips, silencers, etc.) (hereinafter referred to as mounted systems) using a test impact stand containing an additional mechanism that simulates the movement of the bolt carrier that occurs when firing a small arm.

[0012] In order to implement the technical task, a rig for impact testing of mounted systems installed on small arms (hereinafter referred to as the rig) was developed, which includes (Fig. 1-4):

[0013] a frame (1) on which at least one pneumatic cylinder with a control system and compressed air supply is installed, as well as an impact attachment installed on the pneumatic cylinder rod;

[0014] compressed air supply system to pneumatic cylinders;

[0015] control system;

[0016] impact motion parameter measurement system;

[0017] a mechanism that simulates the movement of the bolt carrier that occurs when firing a small arms (hereinafter referred to as the mechanism).

[0018] Let's take a closer look at each element of the designed stand.

[0019] I. The frame (1) is designed to mount the mechanism and auxiliary equipment (pneumatic cylinders, impact attachments, various types of sensors, including the possibility of installing a high-speed camera, etc.). The frame (1) can be made of steel, cast iron, and other materials.

[0020] The frame (1) can have a different design, the main requirement for the frame (1) of the stand is that it must have the necessary rigidity and vibration resistance, sufficient to carry out a series of impact tests of mounted systems installed on the mechanism that is attached to the frame (1), equivalent to a series of at least 25,000 shots from small arms.

[0021] In one embodiment of the invention, the frame (1) may include longitudinal beams, between which the platform (2) from the mechanism is attached, as well as cross beams, which are intended to impart rigidity to the frame (1), mounting platforms (3, 4) intended for installing pneumatic cylinders (5, 6) or a stop (7) or other equipment necessary for simulating the process of firing, recoil and movement of the bolt carrier, arising during firing from small arms (Fig. 3-4). For ease of fastening the platform (2) from the mechanism, T-shaped grooves (Fig. 9) may be provided on the longitudinal beams (1) of the frame.

[0022] Additional equipment can also be installed on the frame (1) (Fig. 2):

[0023] receiver (8), which is designed to accumulate compressed air coming from the compressor, it acts as a buffer between the compressor and pneumatic equipment, ensuring a uniform air supply and smoothing out pressure drops;

[0024] electric cabinet (9), which is designed to automate the control of pneumatic systems and their components;

[0025] pneumatic control cabinet (10), which is designed for centralized control, distribution and preparation of compressed air;

[0026] hoses or pipelines that are designed to supply compressed air from the compressor to the pneumatic cylinders (5, 6, 14);

[0027] High-speed cameras that can be mounted on longitudinal beams;

[0028] other equipment.

[0029] II. Pneumatic cylinders with nozzles.

[0030] The pneumatic cylinder (5), mounted on the mounting platform (4) of the frame (1), is designed to convert compressed air energy into mechanical linear motion. An impact attachment (11) is mounted on the pneumatic cylinder rod (5) using screws or other fasteners. This attachment is designed to transfer the mechanical impact energy to an anvil (12) mounted on the end of the platform (2), or directly to the end of the platform (2) (if an anvil (12) is missing). This simulates the firing of a small arms weapon.

[0031] Dampers, such as polyurethane or other types, can be installed on the impact attachments (11), which are designed to reduce the amplitude and frequency of vibrations transmitted from the impact attachments (11) to the anvils (12) or to the end of the platform (2) (in the absence of anvils (12)).

[0032] In one embodiment of the invention, two pneumatic cylinders (5, 6) are fixed to the frame (1), on the rods of which two impact attachments (11) are installed, and two anvils (12) are installed at the ends of the platform (2).

[0033] With the help of the control system of the stand, the pneumatic cylinder (5) pushes the striking attachment (11), which strikes the anvil (12) of the platform (2) (the shooting process that occurs when firing from a small arms is simulated), after a specified (with the help of the control system of the stand) time interval, the pneumatic cylinder (6) pushes the striking attachment (11), which strikes the anvil (12), installed on the opposite side of the platform (2) (the recoil process that occurs when firing from a small arms is simulated) (Fig. 2-3). An embodiment of the invention without anvils (12) is also possible, in which case the impacts of the attachments (11) will be applied to opposite ends of the platform (2).

[0034] In another embodiment of the invention, one pneumatic cylinder (5) is fixed to the frame (1), on the rod of which an impact attachment (11) is installed, which strikes the anvil (12) or the end of the platform (2) (in the absence of an anvil (12)), then on the opposite side of the end of the platform (2), on the fastening platform (4) a stop (7) can be installed, against which the shoulder (33) rests, it dampens the impact transmitted to the platform (2) with the help of the impact attachment (11), thereby simulating the process of firing and recoil that occur when firing from small arms (Fig. 4).

[0035] Other embodiments of the invention are also possible.

[0036] III. Compressed air supply system of the stand.

[0037] The compressed air supply system shall include at least:

[0038] a compressor that takes in atmospheric air and compresses it to operating pressure;

[0039] hoses (pipeline) designed to transport compressed air from the compressor to the pneumatic cylinders (5, (6), 14).

[0040] The compressed air supply system may include a receiver (8), pneumatic actuators, pneumatic distributors (Fig. 1), pressure regulators, pressure gauges, sensors, safety valves, shut-off valves, nipples, fittings, siphons and other elements.

[0041] IV. Control system of the stand (Fig. 1).

[0042] The control system of the stand includes controllers and actuators, as well as software and a personal computer.

[0043] The developed setup utilizes a programmable logic controller (PLC) for automatic control of pneumatic actuators. Specifically, it collects data from sensors, sets movement coordinates, and generates control signals for pneumatic valve solenoids, adjusting the pneumatic actuators according to a predefined algorithm for controlling the pneumatic actuators' positional cycle. The PLC is controlled using software and a personal computer.

[0044] Pneumatic drives from the developed stand are used as actuators.

[0045] The booth control system may also include other elements necessary for the booth operation.

[0046] V. The system for measuring the parameters of the impact motion of the stand (Fig. 1). The system for measuring the parameters of the impact motion of the stand includes, at a minimum, acceleration sensors (accelerometers (31)), which record the acceleration of the test object at specified points, software for processing and analyzing the collected data, and a personal computer.

[0047] With the help of software and a personal computer, the processing of signals received from the analog-to-digital converter of the piezo accelerometer signal is implemented: noise filtering, distortion correction, and extraction of useful data.

[0048] Pneumatic actuator position sensors, force sensors, temperature sensors, high-speed, high-resolution cameras and other devices can also be used as measuring devices.

[0049] The main parameters that are recorded in the impact motion parameter measurement system of the stand:

[0050] peak impact acceleration;

[0051] duration of shock pulse;

[0052] shock acceleration pulse shape.

[0053] VI. A mechanism that simulates the movement of the bolt carrier that occurs when firing a small arms weapon.

[0054] The mechanism simulating the movement of the bolt carrier that occurs when firing a small arms weapon includes, at a minimum, the following components (Fig. 5-8):

[0055] one rack (13);

[0056] one platform (2);

[0057] one pneumatic cylinder (14);

[0058] one fastener connecting the pneumatic cylinder rod (14) and the drive lever (15) (hereinafter referred to as the fastener);

[0059] one drive lever (16), comprising one drive lever base (17) and one adapter connecting the drive lever (16) to the axial hammer (19);

[0060] one rod (18);

[0061] one axial hammer (19).

[0062] Let's take a closer look at each component of the developed mechanism.

[0063] 1. The stand (13) is designed for fastening the main elements of the mechanism, as well as for further installation into the stand (Fig. 5).

[0064] The mechanism can be attached to the longitudinal lower beam of the frame (1) using at least two cable vibration isolator mounts (29) and one cable vibration isolator (30).

[0065] In one embodiment of the invention, the rack (13) is secured to the longitudinal lower beam of the frame (1) using four fastenings for cable vibration isolators (29) and two cable vibration isolators (30) (Fig. 6).

[0066] The stand (13) can be made of aluminum alloys D16, 6061-T6, etc. The stand (13) can include two protrusions, which can be made in the form of tenons (20), they can be inserted into the sockets of the platform (2) and additionally secured using threaded connections of the screw-nut type or another method, for example, using a welding machine (Fig. 5). The fastening of the stand (13) and the platform (2) can be carried out in another way.

[0067] Additionally, the pneumatic cylinder (14) and the drive lever base (17) are secured to the rack (13) using screw-and-nut threaded connections. For secure fastening using screw-and-nut threaded connections, the drive lever base (17) can be inserted into the socket of the rack base (13), and a metal clamp (22) can be used to secure the pneumatic cylinder (14), which is attached to the end of the rack (13).

[0068] The fastening of the pneumatic cylinder (14) and the base of the drive lever (17) to the rack (13) can be done in another way.

[0069] The stand (13) may contain stiffening ribs designed to increase strength and stability.

[0070] 2. The platform (2) is designed for installation of the tested mounted systems on it, in addition, the following can be installed on the platform (2): accelerometers (31) in three axes: abscissa, ordinate and applicate, special attachments such as anvils (12), shoulders (33), air cushions, etc., as well as a Picatinny rail (21) and side mounting rails (34) (Fig. 5-9).

[0071] Special attachments such as an anvil (12), shoulder (33), air cushion, etc. allow, with the help of an impact attachment (11) and a pneumatic cylinder (5) from the stand, to simulate the process of firing and recoil that occurs as a result of shooting from a small arms.

[0072] The platform (2) can be made without the possibility of connecting special attachments such as an anvil (12), shoulder (33), air cushion, etc., in this version of the design the impact of the attachment (11) will be applied to the end of the platform (2), and a stop (7) can be installed on the opposite side of the end of the platform (2) (Fig. 4).

[0073] Mounting of add-on systems to the platform (2) can be accomplished using a Picatinny rail (21), which can be attached from above the platform (2) using screws to internal threaded mounts located on the platform (2) or by other means, such as using a welding machine. Other rails and types of mounts can be used to mount add-on systems to the platform (2); for example, add-on systems can be secured to the platform (2) using clamps, adapters, and brackets.

[0074] Inside the platform (2) there is a longitudinal through hole and a hollow blind hole, which are intended for installing and fixing the rod (18) with the help of two threaded bushings (sleeves) (26), as well as for placing an axial hammer (19), which is installed on the rod (18) with the help of a through hole in it and is designed with the possibility of moving back and forth along the axis of the rod (18).

[0075] The platform (2) may contain a technological opening of an oval shape (23), which is intended for ease of maintenance and replacement of the main elements located inside the platform (2) (Fig. 5).

[0076] The platform (2) can be designed with the possibility of fastening to the longitudinal side beams of the frame (1) using at least two side fastening strips (34), four fastenings for cable vibration isolators (29) and two cable vibration isolators (30).

[0077] In one embodiment of the invention, the fastening of the platform (2) to the longitudinal side beams of the frame (1) is realized with the help of two side fastening strips (34), eight fastenings for cable vibration isolators (29) and four cable vibration isolators (30) (Fig. 9).

[0078] The side mounting strips (34) can be fastened to the side surfaces of the platform (2) using screws or another method, such as a welding machine. The fasteners for the cable vibration isolators (29) can be fixed with screws to the stand guides and with screws to the side mounting strips (34), or they can be fastened in another way, such as a welding machine (Fig. 9).

[0079] In one embodiment of the invention, the platform (2) comprises internal threaded fasteners designed to secure the side fastening strips (34) to the side surfaces of the platform (2) with screws and to secure the fasteners for the cable vibration isolators (29) to the bottom of the platform (2) (Fig. 9).

[0080] Securing the platform (2) and the stand (13) with the help of cable vibration isolators (30) to the longitudinal beams of the frame (1) provides a “soft” fastening of the developed mechanism, which allows simulating conditions as close as possible to real ones, when shooting from small arms, in which the weapon is held suspended.

[0081] The platform (2) may contain at least one protrusion (24), which may be made in the form of a parallelepiped and contain at least three internal threaded fasteners designed to fix the accelerometers (31) in three axes: abscissa, ordinate and applicate (Fig. 6, Fig. 8).

[0082] Accelerometers (31) are designed to measure accelerations acting on the platform (the installation location of the tested suspended systems).

[0083] The platform (2) can be made of aluminum alloys D16, 6061-T6, etc.

[0084] 3. The pneumatic cylinder (14) is designed to transmit mechanical linear movement to the drive lever (16) due to the energy of compressed air supplied from the compressor and regulated using the stand control system (Fig. 5).

[0085] The pneumatic cylinder (14) can be equipped with a quick-release valve, which is designed to quickly release air from the cylinder's working chamber. Using a quick-release valve will increase the operating speed of the pneumatic actuators (especially in impact and return modes) and reduce the load on the control system, since air is exhausted directly, bypassing throttles and filters.

[0086] 4. The fastening (15) can be made of aluminum alloys D16, 6061-T6, etc.

[0087] The fastener (15) can have a U-shape (Fig. 5), which allows the drive lever (16) to be fixed on both sides. The fastener (15) can have a different shape.

[0088] The pneumatic cylinder rod (14) and the mount (15) can be fixed using threaded fasteners or by other means, such as using a welding machine.

[0089] The fastening (15) to the drive lever (16) can be fixed using screw-nut type threaded connections or by other means, for example, using a welding machine.

[0090] 5. The drive lever (16) is designed to transmit mechanical linear motion from the pneumatic cylinder (14) to the axial hammer (19), it contains at least one drive lever base (17), which is attached to the base of the rack (13) and one adapter connecting the drive lever (16) to the axial hammer (19).

[0091] The drive lever (16) can be attached to the axial hammer (19) using a U-shaped clamping adapter (the U-shaped fastener is inserted into the grooves of the axial hammer (19) with force) or in another way, for example, using screw-nut type threaded connections or using a welding machine.

[0092] The U-shaped adapter for the drive lever (16) allows the axial hammer (19) to be mounted on both sides. The drive lever (16) can be equipped with a different type of adapter, which is designed to connect the drive lever (16) and the axial hammer (19).

[0093] The drive lever (16) can be made of 40X13 steel.

[0094] For secure fastening using screw-nut type threaded connections, the drive arm base (17) can be inserted into the socket of the stand base (13).

[0095] 6. The rod (18) is designed to be mounted on an axial hammer (19); it can be secured in the longitudinal through hole of the platform (2) using two threaded bushings (26) and two nuts (27), as well as in another way. Dampers (25) can be installed on the rod (18) to cushion the impact action of the axial hammer (19) that occurs during its mechanical linear movement back and forth along the axis of the rod (18).

[0096] In one embodiment of the invention, two dampers (25) are installed on the rod (18) on the right and left sides, which are made in the form of two rubber rings (Fig. 5).

[0097] The rod (18) can be installed in threaded bushings (sleeves) (26) to enable the connection of attachments such as an anvil (12), shoulder (33), air cushion, etc. to it through connecting nuts (27) (Fig. 7-8).

[0098] This type of fastening on the rod (18) is assumed to have external threaded fasteners on the right and left sides.

[0099] Also, the rod (18) can be secured to the inner end parts of the platform (2) in another way, for example, using a welding machine.

[0100] The rod (18) can be made of 40X13 steel. The rod (18) can have a cylindrical shape, which ensures smooth movement of the axial hammer (19) along the axis of the rod (18).

[0101] 7. The axial hammer (19) is designed to simulate the movement of the bolt carrier of a small arms (loading the platform (2)); it is made with a through hole, which is intended for its installation on the piston rod (18). The axial hammer (19) can be made with two lateral grooves (28), which are intended for fastening with a U-shaped adapter connecting the drive lever (16) to the axial hammer (19), with a clamp.

[0102] The axial hammer (19) can be attached to the drive lever (16) in another way, such as using screw-nut type threaded connections or using a welding machine.

[0103] The axial hammer (19) has a through hole inside, through which it is installed on the rod (18). To ensure smooth movement of the axial hammer (19) back and forth along the axis of the rod (18), linear bearings (32) can be installed inside the through hole of the axial hammer (19) (Fig. 7).

[0104] In one embodiment of the invention, two linear bearings (32) were installed inside the through hole of the axial hammer (19) (Fig. 7).

[0105] The axial hammer (19) can be made of 40X13 steel. The weight of the axial hammer (19) is selected empirically, depending on the type of firearm and can range from 0.4 to 1 kg or more.

[0106] The developed mechanism (in one of the embodiments of the invention) allows for the implementation of a special loading of the platform (2) due to the axial hammer (19), which is driven by the pneumatic cylinder (14) through the drive lever (16), with a ratio of 1:2.5, thus, at a speed of the pneumatic cylinder (14) of 800 mm / s, at a distance close to the bolt runout of typical samples of small arms (about 150 mm), the axial hammer (19) can develop a movement speed (back and forth along the axis of the rod (18)) of up to 3.2 m / s. It is known from the prior art that, for example, in the AK-47 assault rifle, the speed of the bolt carrier in the extreme rear position is 3.2 m / s, while rolling - about 1.4 m / s. It is also known that the most dangerous vibrations when firing small arms are the impacts of the bolt upon reaching the extreme positions.

[0107] If it is necessary to test mounted systems intended for installation on another type of weapon (for example, a Kalashnikov machine gun or SVD rifle), a different type of pneumatic cylinders will be used (for example, with a maximum speed of up to 1500 mm / s) and other geometric dimensions of the drive lever (16), which are calculated based on the values ​​​​of the bolt carrier speed in the extreme positions of a specific model of small arms.

[0108] The operating principle of the developed stand for impact testing of mounted systems installed on small arms:

[0109] 1. Using accelerometers (31), as well as control systems and measurement systems for the parameters of the stand's impact motion, the main parameters (impact acceleration, the shape of impact pulses, time intervals between impacts during firing, recoil, and at the moment of the bolt carrier movement) that arise during firing from a specific type of small arms at a firing range or shooting gallery during real shooting are measured.

[0110] 2. The mounted system being tested (for example, an optical sight (35) (Fig. 9)) is installed on the platform (2).

[0111] 3. Using the control system and measurement of the parameters of the impact movement of the stand, set the parameters for controlling the pneumatic cylinders (5, (6), 14) from the stand (Fig. 1).

[0112] Using the control system and measurement of the parameters of the impact movement of the stand, it is possible to set the desired accelerogram from the data that was determined as a result of real shooting from a specific sample of small arms, as well as the total time of the impact tests.

[0113] 4. On the platform (2) with a pre-installed mounted system, the process of simulating a shot, recoil, and bolt carrier movement takes place with specified parameters that are as close as possible to real conditions for a specific model of small arms on a specially designed test bench.

[0114] In one embodiment of the invention, using a pneumatic cylinder (5), the striking attachment (11) strikes the anvil (12), the strike is transmitted to the end of the platform (2) (simulating the firing process that occurs when firing from a small arms); after a specified (using the stand control system) time interval, using a pneumatic cylinder (6), the striking attachment (11) strikes the anvil (12), the strike is transmitted to the opposite end of the platform (2) (simulating the recoil process that occurs when firing from a small arms); after a specified (using the stand control system) time interval, the pneumatic cylinder (14) sets in motion the drive lever (16), which in turn sets in motion the axial hammer (19); there is a back and forth movement of the axial hammer (19) along the axis of the rod (18) inside the platform (2), simulating the movement of the bolt carrier that occurs when firing from a small arms weapons.

[0115] In the process of simulating the processes of firing, recoil and movement of the bolt carrier on the developed stand, with the help of accelerometers (31) installed on the platform (2) and the system for measuring the parameters of the impact movement of the stand, the conformity of the reproduced load on the mounted system installed on the platform (2) with the data that was obtained as a result of actual firing for a given model of small arms is checked.

[0116] Depending on the test objectives, the simulation of the firing process, recoil, and bolt carrier movement for a specific model of small arms is carried out on the developed stand for a certain period of time.

[0117] Then the tested suspension system is dismantled and its functionality is checked using a separate method.

[0118] The main advantage of the developed stand is that it allows for the reproduction of impact loads on mounted systems as accurately as possible, taking into account additional movements such as recoil and the stroke of the bolt carrier that occur during actual shooting from small arms. In addition, it becomes possible to conduct resource tests of mounted systems installed on small arms in laboratory conditions.

[0119] So, at present, when conducting endurance tests of mounted systems installed on small arms, real shooting is carried out from small arms with a specific type of mounted system installed on it (for example, during testing in the Ministry of Defense of the Russian Federation, this is done for all types of sights and attachments intended for further adoption into service) with the following typical approximate consumption of ammunition:

[0120] Rifle - 8000 rounds;

[0121] machine gun - 15,000 rounds;

[0122] Machine gun - 25,000 rounds.

[0123] The practical purpose of the developed stand is to be able to simulate such shooting in laboratory conditions, without the need for real shooting and subsequent write-off of a specific type of small arms due to resource exhaustion.

[0124] Implementation of this idea will reduce the time required for such tests, as well as significantly save money when conducting resource tests of mounted systems installed on small arms.

[0125] 4. Brief description of drawings and other graphic materials

[0126] Fig. 1. Schematic diagram of the stand for impact testing of mounted systems installed on small arms.

[0127] Fig. 2. Rig for impact testing of mounted systems installed on small arms (one embodiment of the invention), top view.

[0128] In Fig. 2 the following designations are used:

[0129] 1 - frame;

[0130] 2 - platform;

[0131] 3 - mounting platform for a pneumatic cylinder simulating the process of firing a small arms;

[0132] 4 - mounting platform for a pneumatic cylinder simulating the recoil process of a small arms firearm;

[0133] 5 - a pneumatic cylinder simulating the process of firing a small arms weapon;

[0134] 6 - pneumatic cylinder simulating the recoil process of a small arms firearm;

[0135] 8 - receiver;

[0136] 9 - electrical cabinet;

[0137] 10 - pneumatic control cabinet;

[0138] 11 - impact attachment (total - 2 pcs.);

[0139] 12 - anvil (total - 2 pcs.).

[0140] Fig. 3. Rig for impact testing of mounted systems installed on small arms (one embodiment of the invention), side view.

[0141] In Fig. 3 the following designations are used:

[0142] 1 - frame;

[0143] 2 - platform;

[0144] 3 - mounting platform for a pneumatic cylinder simulating the process of firing a small arms;

[0145] 4 - mounting platform for a pneumatic cylinder simulating the recoil process of a small arms firearm;

[0146] 5 - a pneumatic cylinder simulating the process of firing a small arms;

[0147] 6 - a pneumatic cylinder simulating the recoil process of a small arms firearm;

[0148] 9 - electrical cabinet;

[0149] 10 - pneumatic control cabinet;

[0150] 11 - impact attachment (total - 2 pcs.);

[0151] 12 - anvil (total - 2 pcs.).

[0152] Fig. 4. Rig for impact testing of mounted systems installed on small arms (one embodiment of the invention), side view.

[0153] In Fig. 4 the following designations are used:

[0154] 1 - frame;

[0155] 2 - platform;

[0156] 3 - mounting platform for a pneumatic cylinder simulating the process of firing a small arms;

[0157] 4 - mounting platform for stop;

[0158] 5 - a pneumatic cylinder simulating the process of firing a small arms weapon;

[0159] 7 - stop;

[0160] 9 - electrical cabinet;

[0161] 10 - pneumatic control cabinet;

[0162] 11 - impact attachment;

[0163] 12 - anvil;

[0164] 33 - shoulder.

[0165] Fig. 5. Diagram of the arrangement of the main elements of the mechanism simulating the movement of the bolt carrier that occurs when firing a small arms.

[0166] In Fig. 5 the following designations are used:

[0167] 2 - platform;

[0168] 13 - rack;

[0169] 14 - pneumatic cylinder from the mechanism;

[0170] 15 - a fastener connecting the pneumatic cylinder rod and the drive lever;

[0171] 16 - drive lever;

[0172] 17 - drive lever base;

[0173] 18 - rod;

[0174] 19 - Axial hammer;

[0175] 20 - a stand projection made in the form of a spike (total - 2 pcs.);

[0176] 21 - Picatinny rail;

[0177] 22 - metal clamp;

[0178] 23 - oval-shaped technological hole;

[0179] 24 - protrusion with internal threaded fasteners (total - 2 pcs.);

[0180] 25 - damper (total - 2 pcs.);

[0181] 26 - threaded bushing (total - 2 pcs.);

[0182] 27 - connecting nut (total - 2 pcs.);

[0183] 28 - side groove in the axial hammer (total - 2 pcs.).

[0184] Fig. 6. Diagram of the mechanism simulating the movement of the bolt carrier that occurs when firing a small arms with installed cable vibration isolators.

[0185] In Fig. 6 the following designations are used:

[0186] 11 - impact attachment;

[0187] 12 - anvil (total - 2 pcs.);

[0188] 14 - pneumatic cylinder from the mechanism; 21 - Picatinny rail;

[0189] 29 - mount for cable vibration isolator (total - 4 pcs.);

[0190] 30 - cable vibration isolator (total - 2 pcs.);

[0191] 31 - accelerometers (3 pcs. in total, installed along the X, Y, Z axes);

[0192] Fig. 7. Axonometric vertical section of the platform mounted on the stand.

[0193] In Fig. 7 the following designations are used:

[0194] 12 - anvil (total - 2 pcs.);

[0195] 14 - pneumatic cylinder from the mechanism;

[0196] 18 - rod;

[0197] 19 - Axial hammer;

[0198] 21 - Picatinny rail;

[0199] 26 - threaded bushing (total - 2 pcs.);

[0200] 27 - connecting nut (total - 2 pcs.);

[0201] 32 - linear bearing (total - 2 pcs.).

[0202] Fig. 8. Diagram of the mechanism simulating the movement of the bolt carrier that occurs when firing from a small arms with installed attachments: anvil and shoulder.

[0203] In Fig. 8 the following designations are used:

[0204] 12 - anvil;

[0205] 21 - Picatinny rail;

[0206] 23 - oval-shaped technological hole;

[0207] 24 - protrusion with internal threaded fasteners (total - 2 pcs.);

[0208] 27 - connecting nut (total - 2 pcs.);

[0209] 33 - shoulder.

[0210] Fig. 9. Image of the developed mechanism simulating the stroke of the bolt carrier that occurs when firing small arms as part of a stand for impact testing of mounted systems installed on small arms.

[0211] In Fig. 9 the following designations are used:

[0212] 29 - mount for cable vibration isolator (total - 12 pcs.);

[0213] 30 - cable vibration isolator (total - 6 pcs.);

[0214] 34 - side mounting strip (total - 2 pcs.);

[0215] 35 - optical sight.

[0216] 5. Implementation of the invention

[0217] As part of the implementation of the invention, a stand was manufactured for impact testing of mounted systems installed on small arms, while the “rate of fire” (the number of impacts of the attachment (11) on the anvil (12) installed on the platform (2)) amounted to 300 impacts per minute, which is comparable to the combat rate of fire of Kalashnikov assault rifles and machine guns, and the impact acceleration realized with the help of a compressor amounted to up to 5000 g.

[0218] This embodiment of the invention (Fig. 2-3) contained in its composition:

[0219] frame (1), on which two pneumatic cylinders (5, 6) were installed, as well as impact attachments (11) installed on the pneumatic cylinder rods;

[0220] compressed air supply system to pneumatic cylinders;

[0221] control system;

[0222] impact motion parameter measurement system;

[0223] mechanism which included:

[0224] one rack (13);

[0225] one platform (2);

[0226] one pneumatic cylinder (14);

[0227] one fastener connecting the pneumatic cylinder rod (14) and the drive lever (15);

[0228] one drive lever (16), comprising one drive lever base (17) and one adapter connecting the drive lever (16) to the axial hammer (19);

[0229] one rod (18);

[0230] one axial hammer (19), containing two side grooves (28);

[0231] two stand projections made in the form of spikes (20);

[0232] one Picatinny rail (21);

[0233] one metal clamp (22);

[0234] one oval-shaped technological hole (23);

[0235] two protrusions with internal threaded fasteners (24);

[0236] two dampers (25);

[0237] two threaded bushings (sleeves) (26);

[0238] two connecting nuts (27);

[0239] three accelerometers (31);

[0240] two linear bearings (32).

[0241] The mechanism is attached to the frame (1) using:

[0242] twelve cable vibration isolator mounts (29);

[0243] six cable vibration isolators (30);

[0244] two side mounting strips (34).

[0245] When conducting impact tests of the developed stand, an optical sight (35) was used as a mounted system.

[0246] The frame (1) of the stand was made of cast iron, the post (13), platform (2), two side mounting strips (34), twelve fastenings for cable vibration isolators (29) were made using the mechanical processing method from aluminum alloy D16 (complies with the requirements of GOST 4784-97 “Aluminum and deformable aluminum alloys”).

[0247] Cable vibration isolators (30) (6 pcs. were used in total) were made of cables based on stainless steel grade A2 / AISI304 / 08X18H10.

[0248] The overall dimensions of the frame (1) of the stand (L×W×H) are: 1500×400×600 mm. The length of the rack (13) is 450 mm, the height of the rack (13) with the platform (2) installed on it is 215 mm, the thickness of the rack (13) is 30 mm, the overall dimensions of the platform (2): 350×60×100 mm.

[0249] The rod (18), as well as the impact attachments (11) and anvils (12), were manufactured using mechanical processing from 40X13 steel (meets the requirements of GOST 5632-2014 "Alloyed stainless steels and corrosion-resistant, heat-resistant, and heat-resistant alloys"). Additionally, polyurethane dampers were installed on the impact attachments (11).

[0250] The cylindrical rod (18) had a length of 160 mm, a diameter of 10 mm, the right and left sides of the rod (18) were made with external threaded fasteners, in order to connect with the internal threaded fasteners of the threaded bushings (sleeves) (26).

[0251] The drive lever (16) was made of 40X13 steel (meets the requirements of GOST 5632-2014 “Alloyed stainless steels and alloys that are corrosion-resistant, heat-resistant and heat-resistant”).

[0252] The pneumatic cylinders (5, 6, 14) used were the well-known SC40×100S brand pneumatic cylinders, with the following main technical characteristics:

[0253] Body material - aluminum alloy;

[0254] speed range: 30-800 mm / s;

[0255] Rod type - single-sided;

[0256] damping length - 24mm;

[0257] piston stroke - 100 mm;

[0258] piston diameter - 40 mm;

[0259] working pressure range - 0.1-0.9 MPa;

[0260] maximum pressure - 1.35 MPa;

[0261] operating temperature - from minus 10 to plus 80 °C;

[0262] damping type - with adjustable braking intensity in both directions;

[0263] Type of execution - double-acting;

[0264] Pneumatic braking system type - pneumatic braking at the end of the stroke.

[0265] The axial hammer (19) was made using the mechanical processing method from 40X13 steel (meets the requirements of GOST 5632-2014 "Alloyed stainless steels and corrosion-resistant, heat-resistant and heat-resistant alloys"), the weight of the hammer was 0.55 kg, in the through hole of the axial hammer (19) were installed the known from the state of the art LM10-L-UU ISKRA bearings with the main technical characteristics:

[0266] weight - 0.062 kg;

[0267] outer diameter - 19mm;

[0268] inner diameter - 10mm;

[0269] dynamic load - 600 N;

[0270] number of recirculations - 4;

[0271] Tightening torque: 7.24 N×m.

[0272] The compressor used was a well-known CA-75-10GA IP-54 (CROSS AIR compressor) with a capacity of 12,000 l / min, power of 75 kW, maximum working pressure of 10 atm, weight of 1130 kg and overall dimensions of 2000×1250×1670 mm.

[0273] The receiver (8) used was the well-known YURUI model with a volume of 9.5 liters and a maximum pressure of 1.38 MPa.

[0274] The accelerometers (31) used were the YMC Piezotronics ASM 111A02 piezo accelerometers, which are known from the prior art and have the following main technical characteristics:

[0275] The measurement range of shock acceleration amplitudes is from 5 to 2⋅10 4 (from 50 to 2⋅10 5 ) g (m / s 2 );

[0276] Nominal conversion factor - 0.25 (0.025) mV / g (mV / m⋅s -2 );

[0277] deviation of the conversion factor from the nominal value, no more than ±10%;

[0278] nonlinearity of the amplitude characteristic, no more than 10%;

[0279] relative error of measurements of shock acceleration amplitudes, no more than ±1 dB;

[0280] self-resonant frequency, not less than 40 kHz.

Claims

1. A rig for impact testing of mounted systems installed on small arms, comprising a frame on which at least one pneumatic cylinder is mounted with a control system and compressed air supply, as well as an impact attachment mounted on the pneumatic cylinder rod, a system for supplying compressed air to the pneumatic cylinders, a control system, a system for measuring the parameters of the impact movement, characterized in that it additionally contains a mechanism simulating the movement of the bolt carrier that occurs when firing from a small arm, containing at least one rack to which at least the following are attached: one pneumatic cylinder with one fastener connecting the pneumatic cylinder rod and the drive lever; one drive lever comprising one drive lever base secured to the base of the rack and one adapter connecting the drive lever to the axial hammer; one platform, inside which there is a through hole and a hollow blind hole, where a rod with at least one axial hammer mounted on it is installed and secured through a through hole in the axial hammer and is configured to move back and forth along the axis of the rod.

2. The stand according to paragraph 1, characterized in that two pneumatic cylinders with two impact nozzles mounted on the piston rods of the pneumatic cylinders are installed on the stand frame.

3. A stand according to paragraph 1, characterized in that T-shaped grooves are provided on the longitudinal beams of the frame.

4. A stand according to paragraph 1, characterized in that the following are additionally installed on the frame: a receiver, an electrical cabinet, and a pneumatic control cabinet.

5. The stand according to item 1, characterized in that a Picatinny rail is attached to the platform using screws.

6. The stand according to paragraph 1, characterized in that two dampers are installed on the rod on the right and left sides, made in the form of two rubber rings, which limit the destructive effect of the axial hammer on the platform when it moves back and forth along the axis of the rod.

7. The stand according to item 1, characterized in that the platform has an oval-shaped technological opening.

8. The stand according to paragraph 1, characterized in that the fastening of the pneumatic cylinder, the base of the drive lever and the platform to the rack is made using threaded connections of the screw-nut type.

9. The stand according to paragraph 1, characterized in that the axial hammer has two grooves intended for fastening with a U-shaped adapter of the drive lever with clamping.

10. The stand according to paragraph 1, characterized in that the platform has at least one projection, which is made in the form of a parallelepiped and contains at least three internal threaded fasteners designed to fix the accelerometers in three axes: abscissa, ordinate and applicate.

11. The stand according to paragraph 1, characterized in that the platform contains internal threaded fasteners designed for installing at least two fastening strips to which fasteners for cable vibration isolators are fixed.

12. The stand according to paragraph 1, characterized in that the pneumatic cylinder rod and the base of the drive lever are connected to each other using a U-shaped fastener.

13. The stand according to paragraph 1, characterized in that two linear bearings are installed inside the through hole of the axial hammer, designed to ensure smooth movement of the axial hammer along the axis of the rod.

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