RU2251072C2 - Device for testing inner side of barrel - Google Patents

Abstract

FIELD: measuring engineering.

SUBSTANCE: device comprises probe with a head for visual observation of the barrel with a video camera, unit for power supply and control, computer, monitor, cassette-adapter, movable probe made of a long thin-walled cylinder provided with a measuring head, and front and back suspensions connected with the movable and unmovable bushings mounted on the thin-walled cylinder. The cassette-adapter has the housing made of a cylinder with three screw cuts. One of the faces of the cylinder is provided with tree projections, which cooperate with the screw cuts in the barrel. The other end of the cylinder defines a trancated cone for setting the movable probe into the cassette-adapter.

EFFECT: expanded functional capabilities.

12 cl, 10 dwg

Description

The invention relates to measuring technique and can be used to measure the wear of the channel of rifled trunks in the fields (protrusions) and rifling (hollows), measure wear of conical surfaces (chambers), as well as inspect defects on the inner surface of the channels of rifled trunks.

Known RIB-2000 system of the company "KAPPA" opto-electronics GmbH for inspection of the inner surfaces of the trunk channels, containing two cameras frontal and side inspection of defects on the inner surface of the trunks, interchangeable rings for basing the device in different trunk channels, a monitor with a large-scale grid for visual inspection and measurement of defects: cracks, cavities, growths, corrosion, etc. (1).

The disadvantage of this device is the inability to measure the wear of the bore and conical surfaces.

The prototype is the system described in the article “A study on the precision wear measurement for a high friction and high pressurized gun barrel by using a diamond indenter” (2).

This article describes the system and method for precision measurement of the wear of the bore. To do this, special notches with certain geometric parameters are applied with the diamond tool in the fields of the helical line of the bore. After that, several shots are made, then, using an electronic scanning microscope and a profilometer, the geometric parameters of the previously applied notches are measured and the wear of the barrel channel is calculated.

This method of measuring the bore of the bore is related to research and cannot be applied in practical work, and also has significant drawbacks, since it is based on an indirect measurement of the bore of the bore, is very time-consuming and low-operational, expensive and introduces additional defects into the bore .

The claimed invention allows to solve the following problems: to expand the functionality of the system, i.e. measure conical surfaces, measure the wear of the internal channel of the product by fields and rifles, increase the efficiency of processing the information received during measurements, increase the accuracy of measurements, frame-by-frame viewing of the internal surface of the bore of the barrel, inspect and measure the wear of different diameter channels of rifled trunks both in fields and and rifling, as well as inspecting and measuring wear on the inner conical surface.

This is achieved by the fact that the system for examining defects of the inner surface and measuring wear of the channels of rifled trunks, consisting of a movable probe with a head for inspecting the channel and a video camera, a power supply and control unit (BPU) with a controller, an electronic computer, a monitor, additionally contains an adapter cartridge, the movable probe is made in the form of a long thin-walled cylinder, on which there is a measuring head with an annular level, the suspension of the front and rear wheels connected to the movable and stationary bushings located on a thin-walled cylinder, and the movable bushings connected to the suspensions of the front and rear wheels are interconnected by a screw mechanism with left and right threads at its ends, the measuring head is made in the form of small and large cylinders, in which are respectively located: in a small - a video camera with LEDs, in the large - an annular level, movable pegs with twelve holes forming a concentric circle, at the end of the large cylinder there are three holes forming straight an angular triangle, the annular level is located in the focus of the lens of the video camera, the measuring head contains twelve movable pegs, six of which are in contact with the threads of the screw thread, and six are in contact with the grooves of the barrel, the adapter cartridge has a cylinder-shaped body with three helical grooves with angle of rise from 7 to 10 ° and located at an angle of 120 ° relative to each other, one of the end surfaces of the cylinder has three protrusions for interfacing with screw cuts in the bore of the barrel, the other end of the cylinder It has a truncated cone for introducing the movable probe into the adapter cartridge, each suspension consists of three links forming a lever triangular shape and located at an angle of 120 ° to each other, each suspension link consists of a support arm, one end of which is supported by a fixed hub, wheels mounted on the second end of the support arm, a small composite arm, the small composite arms are U-shaped and have a rod with a spring that rests on one end through a washer on a piezoelectric element, and the other end of the mating pivotally with the support arm, the small composite arm pivotally mates through the stem with the support arm at a distance 1/3 of the length of the support arm from the wheel, the housing of the small composite arms mates through hinges with movable bushes, the wheels are rotated by an angle around its vertical axis equal to the angle lifting the helical line of the helical mechanism of the barrel, the wheels of the front suspension are made with the profile of the helical line of the barrel, and the wheels of the rear suspension are covered with barrel-shaped rubber with a radius of curvature of the inner diameter of the barrel.

Figure 1 shows the composition of the measurement and control system, where indicated:

1 - Muzzle brake.

2 - Cassette adapter.

3 - The probe is movable.

4 - Electronic computer (computer).

5 - Power supply and control unit (BPU) with a controller.

6 - Monitor.

Figure 2 shows the design of the movable probe, where indicated:

7 - Thin-walled cylinder.

8 - Suspension of the front wheels.

9 - Suspension of the rear wheels.

10 - Measuring head.

11 - Head for inspection of surfaces.

Figure 3 shows a view A of the probe, where indicated:

12 - The wheels of the front suspension.

13 - The wheels of the rear suspension.

Figure 4 shows the design of the carriage of the probe, where indicated:

14 - The wheels of the front suspension.

15 - The wheels of the rear suspension.

16 - Small compound lever.

17 - Support lever.

18 - Movable sleeve.

19 - Support sleeve.

20 - Screw mechanism for sliding the wheels.

Figure 5 shows the design of a small lever, where indicated:

21 - Lever housing.

22 - Stock.

23 - Spring.

24 - Washer.

25 - Piezo element.

Figure 6 shows the front suspension wheel, where indicated:

26 - The surface of the wheel moving along the fields of the helix.

27 - The surface of the wheel moving along the hollow of the helix.

7 shows a rear suspension wheel, where

28 - Wheel profile (barrel-shaped).

On Fig shows the measuring head, where indicated:

29 - Small cylinder.

30 - Large cylinder.

31 - Mobile splitters.

32 - Camcorder with LEDs.

33 - Ring level.

In Fig.9 shows a section aa of the small cylinder of the measuring head, where indicated:

34 - Holes movable pegs.

35 - Holes located at the end of a large cylinder.

Figure 10 shows the adapter cartridge, where indicated:

36 - Case.

37 - Rifling.

38 - Cone.

39 - Projections.

The system for measuring and inspection of rifled trunks consists of an adapter cassette 2, a movable probe 3, a computer 4, a control unit 5, and a monitor 6.

The probe 3 structurally consists of a long thin-walled cylinder 7, on which there are three suspension links of the front wheels 8 and three suspension links of the rear wheels 9, the measuring head 10 with movable pegs 31, the head for inspecting the channel and the barrel chambers 11. The front suspension link 8 consists of a wheel 12 mounted on a support arm 17, with which the small composite arm 16 is articulated to be coupled through the rod 22. The support arm 17 is supported at one end by the support stationary sleeve 19, and the small arm 16 is supported by the ends of the movable sleeve 18. Rear I suspension 9 is different from the front suspension 8 a barrel-shaped wheels. The movable bushings 18 of the front and rear suspensions 8, 9 are connected using a screw mechanism 20, which has right and left threads at the ends. When the screw mechanism 20 is rotated, the bushings 18 of the suspensions 8, 9 move either towards each other or in opposite directions, thereby spreading or lowering the wheels 12, 13 through the support arms 17. The design of the small arm 16 consists of a U-shaped housing 21 of the movable rod 22 , springs 23, washers of the supporting 24 and piezoelectric element 25. The levers 16 and 17 are adjusted to certain diameters of the trunks, and the springs 23 “select” the wear of the diameter of the barrel.

A measuring head 10 is interfaced with a thin-walled cylinder 7, consisting of a small cylinder 29, a large cylinder 30, in which there are movable pegs 31 with holes 34, a video camera with LEDs 32 and an annular level 33. Holes 34 are located in the body of the large cylinder 30.

The adapter cassette 2 consists of a housing 36 with three screw threads 37, protrusions 39. One of the ends of the adapter cassette is made in the form of a truncated cone 38.

Before measuring the wear of the bore, the probe is calibrated in a special gauge with helical lines.

The movable probe 3 is inserted into the caliber of the desired diameter and, in the absence of a definite pressure force on the wheels 12, 13 to the gauge surface, the sensors on the piezoelectric elements 25 send a command to move the wheels through the screw mechanism 20. When a certain force is reached, the wheels 12, 13 are stopped and the probe is calibrated to special stand. The computer 4 remembers the coordinates of the openings 34 of the movable pegs 31. Then, the probe 3 is inserted into the adapter cartridge 2 and then into the muzzle brake 1, thereby pairing the adapter cartridge 2 with the barrel channel.

The microprocessor controller BPU 5 communicates the probe 3 with the computer 4 and provides control of all nodes of the probe 3. According to the commands of the computer 4, the controller starts and stops the movement of the probe 3 with the measuring head 10 for inspection of the barrel. According to the commands of the computer 4, the microprocessor controller automatically controls the breeding of the levers 16, 17 with the wheels 12, 13 to ensure contact with a certain pressure force of the wheels to the fields of the barrel. To ensure such control, the controller receives information about the indicated efforts from special sensors 25 on the piezoelectric elements located on the small levers 16. In addition, the controller processes information from the sensor for moving the probe 3 - ring level (angle sensor) 33.

When the system is in operation, the computer calculates the coordinates of the holes 34 of the pegs 31, compares them with the passport values obtained by special calibration of the measuring head 10.

The computer through the controller BPU 5 gives the command to move the probe 3 along the trunk, while simultaneously measuring both the diameter of the trunk over the fields and ruts by the drums 31 and inspecting its inner surface. Inspection is carried out by rotating the camcorder 11 sequentially at six positions through 60 °. Computer 4 compares the obtained results with the results obtained during calibration, calculates the barrel wear and displays on the monitor display 6 a detailed picture of the state of the barrel’s inner surface (by cavities, by cracks, by shells, by corrosion, etc.).

The technical solutions underlying the design of the measuring and inspection system for threaded shafts are made at the modern level of development of measuring equipment using the domestic element base; preparations are underway for the production of prototypes.

Bibliographic data

1. Prospectus “RIB-2000 system of the company“ KAPPA ”opto-electrohics GmbH.

2. Article ″ A study on the precision wear measurement for a high friction and high pressurized gun barrel by using a diamond indenter ”. Dong-Yoon Chung, Hosung Kong, Suk-Hyun Nam. 0043-1648.99.S-see front matter 1999 Published by Elsevier Science S.A. All rights reserved. Pll: S0043-1648 (99) 00047-2.

Claims (13)

1. A system for inspecting defects of the inner surface and measuring wear of the channels of rifled trunks, consisting of a movable probe with a head for inspecting the channel and a video camera, a power supply and control unit (BPU) with a controller, an electronic computer, and a monitor, characterized in which additionally contains an adapter cartridge having a cylinder-shaped body with three helical lines — grooves and end surfaces, one of which has three protrusions for interfacing with helical grooves of the barrel channel, and the other end rotates NOSTA cylinder forms a truncated cone to enter the movable probe into the cassette adapter, a movable probe is in the form of a long thin-walled cylinder, on which the measuring head level with the ring, the suspension of the front and rear wheels connected to the moving and fixed bushings disposed on the thin-walled cylinder. 2. The system according to claim 1, characterized in that the movable bushings connected to the suspensions of the front and rear wheels are interfaced with a screw mechanism with left and right threads at its ends. 3. The system according to claim 1, characterized in that the measuring head is made in the form of small and large cylinders, in which respectively are located: in the small - a video camera with LEDs, in the large - an annular level, movable pegs with twelve holes forming a concentric circle, at the end of a large cylinder there are three holes forming a right triangle. 4. The system according to claim 3, characterized in that the annular level is located in the focus of the lens of the video camera. 5. The system according to claim 3, characterized in that the measuring head contains twelve movable pegs, six of which are in contact with the screw cutting fields, and six are in contact with the grooves of the barrel. 6. The system according to claim 1, characterized in that the three helical lines-grooves in the housing of the adapter cartridge are made with an elevation angle of 7-10 ° and are located at an angle of 120 ° with respect to each other. 7. The system according to claim 1, characterized in that each suspension consists of three links forming a lever triangular shape and located relative to each other at an angle of 120 °. 8. The system according to claim 7, characterized in that each link of the suspension consists of a support arm, one end resting on a fixed hub of the wheel, mounted on the second end of the support arm, a small composite arm. 9. The system of claim 8, characterized in that the small composite levers are U-shaped and have a rod with a spring that rests on one end through a washer on a piezoelectric element, and the other end is pivotally coupled to a support lever. 10. The system of claim 8, characterized in that the small composite lever pivotally mates through the rod with the support arm at a distance of 1/3 of the length of the support arm from the wheel. 11. The system of claim 8, characterized in that the housing of the small composite levers are mated through hinges with movable bushings. 12. The system of claim 8, characterized in that the wheels are rotated by an angle around its vertical axis, equal to the angle of elevation of the helical line of the helical mechanism of the barrel. 13. The system of claim 8, wherein the wheels of the front suspension are made with the profile of the helical line of the barrel, and the wheels of the rear suspension are covered with barrel-shaped rubber with a radius of curvature of the inner diameter of the barrel.

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