SU1465699A1 - Device for checking defects of cylindrical surfaces of parts - Google Patents

Abstract

The invention relates to a measurement technique and can be used to monitor defects in the top of cylindrical parts, mainly enamel coating of wires. The purpose of the invention is to expand the range of monitored parts of various diameters, as well as to increase the sensitivity of the control by increasing the illumination of the monitored area of the part. The device contains a light source 1 installed on the same optical axis, a collimator made in the form of two ax-rays 3 and 4, axicon 2, two transparent plates 7 and 8 with rollers 5 and 6 fixed on them and a conical mirror 12. Between the plates 7 and 8 there is a set of lenses 9, behind each of which there are radiation receivers 10. The outputs of the receivers 10 are connected to the information processing unit 11. When a defect enters the zone of the illuminated area, the rays, L-F (not on the surface of the controlled part 13, are scattered and some of them get through the lenses 9 to the radiation receivers 10 and the information processing unit 11 detects the presence of a defect. and increases the sensitivity of the device. 1 Cpf-ly, 1 ill. (O 4 O5 sd o r o 11

Description

The invention relates to a measurement technique and can be used to monitor the defects of cylindrical parts, mainly enamel coating of wires.

The purpose of the invention is to expand the range of controlled parts due to the provision of control of parts of different diameters, as well as increase the sensitivity of control due to the increased illumination of the monitored area;

The drawing shows a schematic diagram of a device for monitoring surface defects of cylindrical parts.

The device contains a light-emitter 1 located on the same optical axis, the first axicon 2, the second 3 and the third 4 axicons, located between the light source 1 and the first axicon 2 and forming the collimator. The guide rollers 5 and 6 are fixed on transparent plates 7 and 8, in which holes are made along the optical axis of the device. Between the transparent plate, ha 7 and 8, on the sides of a regular fflohgolnik, you have a set of l nz 9. The symmetry axes of the lenses 9 coincide with the axis of symmetry of the sides of the polygon. Behind the lenses 9, radiation receivers 10 are installed, the outputs of which are connected to block 1 are

bots.

Behind the transparent plate 8 there is a conical mirror 12 in such a way that its optical axis is located on the axis of the beam of the light source 1. The angle i at the apex of the conical mirror 12 is equal to –2, where j3 is the angle of putting the rays on the surface of the part 13. Part 13 is placed on the rollers 5 and 6, is fitted through the holes in the transparent plates 7 and

8 and connected to a moving mechanism (not shown). Lin Symmetry Axis

9 pass through the middle of the illuminated section of the part 13.,

The device works as follows.

in a way.

The beam from the source of light 1 hits the axicon 3, which forms. a beam of beam, having axial symmetry and directed under the same and the same angle to the optical axis of the device. Axicon 4 forms a bundle of lu;

five

0

whose parallel to the optical axis of the device.

The rays are located around the ring in the interval r ... r + dr, where r is the radius of the ring, depending on the distance between the axicons 2 and 3; 4 g depends on the width of the beam of rays and is half that width.

 AXICON 2 forms a beam of rays inclined at an angle to the optical axis, which on the surface of a part 13 of any diameter illuminates the optic region. Its length 1 depends on the angle at the vertex of the axicon 4, on the width of the beam of rays and on the diameter of the part being inspected 13.

The rollers 5 and 6 mounted on the transparent plates 7 n In, ensure the translational movement of the part 13 along the optical axis of the device.

In the absence of defects, the rays are reflected from the surface of the part 13, and there are no signals at the radiation receivers 10.

When a defect enters the illumination zone, the rays are scattered on it, fall on one or several lenses 9 and are focused on the radiation receivers 10.

The information processing unit 11 registers the times and magnitudes of the output signal from the radiation receivers 10, which allows to judge the linear coordinate of the defect and its properties.

Claims (2)

The rays reflected from the surface of the part 13 fall on the surface of the conical mirror 12 at a right angle and, reflecting from it, increase the illumination of the part 13 by almost 2 times, which increases the sensitivity of the device also almost twice. Claim 1. Device for inspecting surface defects of cylindrical dates, containing successively on a single optical axis a light source, a collimator, axicon two transparent plates with guide rollers for a test piece, a set of lenses installed between transparent plates along the sides of a regular polygon that the axes of symmetry of the lenses coincide with the axes of symmetry of the polygon, the radiation receivers, each of which 3 1465699 i ryh located behind the corresponding 2. The device according to claim 1, about tl and a lens, and an information processing unit, so that the inputs of which are connected to the outputs of the control sensitivity head radiation receivers, distinguished-g it is equipped with a conical mirror, Shche e with the fact that, with the aim of a flash-mounted on the optical axis along Renee nomenclature controlled by the path of the rays for the second translucent details, the collimator is made in the form of a plate, and the angle for the two concise two axicons installed by the top mirror is doubled by angles to each other and made by falling rays onto the plane, producing one material, and the angles when they go through the axes of the guide rods are equal .licks.