SU1578470A1 - Apparatus for checking appearance of parts of bushing type - Google Patents

Abstract

This invention relates to instrumentation technology. The aim of the invention is to improve the quality of control by detecting internal and external chamfers and defects on them. With the help of optoelectronic converters (OED) 4, 5, 6, the controlled part is positioned. The control of the EIA 4, 5, 6 is carried out with the help of the nodes of the control of the movement of the EIA. When one type of surface passes to another (which occurs when the treatment is defective or chamfers are present), the intensity of the reflected flow changes. Information about this goes to control and processing blocks 16, 17, 18, where it is compared with the reference one. The result of the comparison enters the analyzer 15, which also receives information about the coordinates of the chamfers. As a result, the analyzer 15 generates a signal to the site 3 of the examination of the validity or rejection of the part. 1 hp f-ly, 11 ill.

Description

SP

00 Ј -vl

The invention relates to a measurement and control technique.

The purpose of the invention is to improve the quality of control by detecting internal and external chamfers and defects on them.

FIG. 1 shows a block diagram of a device controlling the appearance of parts such as a sleeve; in fig. 2 - control scheme of cylindrical surfaces of parts such as a sleeve; in fig. 3 is a view along arrow A on FIG. 2; in fig. 4 is a view along arrow B in FIG. 2; FIG. 5 is a view along arrow B of FIG. 2; in fig. 6 is a control diagram of the face surface of sleeve-type details, the presence of chamfers and defects on them; in fig. 7 - cut G-Y in FIG. 6; in fig. 8 is a view along arrow D in FIG. 6; in fig. 9 is a view along arrow E of FIG. 6; in fig. 10 - the elements of the outer and inner chamfer details of the type of sleeve; in fig. 11 - elementary areas of the end surface on the input window of the photodetector, side view.

The device contains serially connected loading unit 1, transporting unit 2 and collecting station 3 moving along a predetermined path of the first 4, second 5 and third 6 optoelectronic transducers (OED), mechanically connected synchronization unit 7 and movement control unit 8 OEP, the output of which is connected to the second input of the transportation unit 2, the three nodes 9-11 of the base of controlled parts, the inputs of which are connected to the second, third and fourth outputs of the transportation section 2 and the electronic system, 10 of the serially connected timer 12, television signal generator 13 (CTA) and display unit 14, analyzer 15, block 16 for controlling and processing information on cylindrical surfaces, the first output of which is connected to the first input of the analyzer 15, and the second to the second input of CTA 13, two blocks 17, 18 for controlling and processing information about the end surfaces, the first outputs of which are connected to the second and third inputs of the analyzer 15, and the second outputs are connected to the third and fourth inputs of the HZ 13, the second output of timer 12, is connected to the first the inputs of the block 16 for controlling and processing information about the cylindrical surfaces, and the first and second blocks 17 and 18 for controlling and processing information about the end surfaces, the third outputs of which are connected to the first inputs of the respective first and second OED 4 and 5, the outputs of which are connected to the second inputs of the corresponding blocks 17 and 18 of controlling and processing information about the end surfaces, the second input of the block

16 controlling and processing information about the cylindrical surfaces is connected to the output of the third EIA 6, the first input of which is connected to the third output of the control and information processing unit 16 on the cylindrical surfaces, the second output of the OEP movement control node 8 is connected to the second inputs of the OEP 4 and 5, and the third output with the second input of the third OED 6, the first output of the synchronization unit 7 is connected to the third inputs of the blocks

17 and 18 for controlling and processing information about the end surfaces, and a second output to the third input of the control and information processing unit 16 on cylindrical surfaces, the output of the analyzer 15 is connected to the second input of the inspection unit 3.

The electronic system consists of two identical chains consisting of serially connected coordinates determining unit 19 (20) and digital comparator 21 (22), the outputs of which are connected to the fourth and fifth inputs of the analyzer 15, the inputs of units 19 and 20 determining the coordinates of the connectors | Neena with the fourth outputs of the blocks 17 and 18 of the control and processing of information on the end surfaces, the adjustment block 23, the input of which is connected to the third output of the synchronization unit 7, the first output connected to the third input of the control and Information processing block 16 cylindrical surfaces, and the second outlet is connected to the second inlet of the third OED 6.

The device works as follows.

Controlled parts, which are bureaucraticly oriented, with the help of loading unit 1 are successively delivered to transport unit 2, which is delivered to control positions, to base units 9-11, where they are positioned on a roller prism.

24 rollers 25 podzhim, and rotation with the speed of CO.

The control consists in scanning the monitored surfaces with a light strip 26 formed at an angle and a monitored surface in a plane passing through the axis of the radiator 27, the photoreceiver 28 and the axis of rotation of the part being monitored, and element-by-element analysis of the images corresponding to the illuminated surface areas by the method of detection surface defects on the basis of the brightness of its image.

The light strip 26 is formed by OED 4-6 using the radiator 27 and the lens 29, at the output of which the beam is compressed by the cylindrical lens 30 in a plane perpendicular to the axis of the part, and directed by means of the mirror 31 to the monitored surface. The illuminated surface area is projected by the lens 32 onto the input window of the two-dimensional photodetector 28.

Moving along a predetermined trajectory along the guides 33, OEP 4-6 inspects the outer and inner surfaces of the parts to be inspected. The control of the CEC 4-6 is carried out with the help of the copiers 8 of the control of the movement of the CED 4-6, which is synchronized with the operation of the transport unit 2 and the adjustment unit 28. The synchronization unit 7, mechanically connected with the movement control unit 8 of the OED 4-6, generates the synchronization pulses of the mechanical and electronic parts of the control device, which enter the electronic units. With the arrival of these pulses at the moment when the light strip 26 transitions from one surface to another, the digital thresholds are set in the control and information processing unit for cylindrical surfaces 16, for example, the area of the local defect in the frame, the area of the distributed defect in the base section, etc. p., determining the criteria for defectiveness of parts for each of the test surfaces in accordance with known parameters: shape, method and purity of processing, reflectivity. In addition, in order to compensate for the influence on the reliability of control of the factors listed above, adjustment unit 23

6

ten

0

five

For each type of monitored surface of the part, a radiation intensity adjustment signal is generated for the radiator 27.

The control and information processing units 16-18 produce pulsed control signals of the photoreceivers 28, from the outputs of which video signals are supplied to the information control and processing units 16-18, where they are filtered, amplified, normalized in amplitude and duration, turning into a video signal The basic image 34 of the elementary area of the part being monitored, and yes, is further processed according to a predetermined digital processing algorithm (for example, calculating the defect area in the frame or in the base section), resulting from The deosignal is given information about the monitored parameter in the form of a number that is compared with the established digital values corresponding to the maximum permissible values of the monitored parameters, for example, the image area of the defect 35 from block 36. If the monitored parameter value is out of tolerance, then a Scrap signal is generated which enters the analyzer 15, in which it is written to the register. Information on the presence of a Scrap signal is recorded in the register on all control channels and the total information on the defectiveness of the monitored parts is shifted in the register with the frequency of supply of the parts to the transportation unit 2. When the checked part approaches the grading unit 3, the latter, by the output signal of the analyzer 15, directs it, in accordance with the results of the inspection, to a suitable or rejected parts bunker.

Blocks 1 9 and 20 of coordinates determination and digital comparators 21 and 22 are introduced into the electronic part of the device to control the presence of external and internal chamfers and defects on them.

The method is carried out as follows.

The video signal corresponding to the binary image of the elementary area of the end surface of the test piece enters the coordinates determining blocks 19 and 20, where in the coordinate system of the two-dimensional photo 0

five

0

five

0

five

the receiver is determined by the coordinates of 8H; 37 and Fs, p; 38 images of the transition point of the flat face surface to the conical surfaces, respectively, of the inner and outer asoc for each of the i lines. Numeric values F Nar; and F 6n; in digital comparators 21 and 22 are compared with the set threshold digital JQ values of F naroil (, F Hqp., max. max. fi corresponding to the maximum allowable chamfer sizes. If the image of the end surface boundaries is out of allowable limits, then a signal is generated Marriage.

If there are defects on the chamfers, the radiation pattern of the reflected beam from them partially falls into the lens 32, which builds a pO image of the defect element on the input window of the photodetector 28. At the input of the digital comparator 21 (22), the numerical values of the coordinates of the images of the elements of the chamfer Fara, , F 6Hi; corresponding to the presence on them. defects and at least

ONE OF THE CONDITIONS Ф К0 | р Ф; g (Fnarp,; g, F nar, F int. ZN. f vn, go). At the output of the digital 30 comparator 21 (22), a Scrap signal is generated.

Video signals of binary images of elementary areas of monitored surfaces of parts from blocks 35 16-18 of controlling and processing information about cylindrical and end surfaces are fed to block 13 of a television signal generator, where they are converted into a television signal, 40 which enters display block 14, on the screen of which Observe the binary images of the elementary areas of the tested surfaces along any of the control channels, which is necessary in the process of setting up and adjusting the OEP and monitoring the operability STI individual control units of the device.

Timer 12 generates a quartz-JQ value meanders of voltages at predetermined frequencies, which are used to implement the functions of synchronization, control, and processing of information.

Claims (2)

Invention Formula 1, The device controls the appearance of parts such as sleeve, soss ABOUT 0 5 0 5 Q five The most common of serially connected loading unit, transportation unit and sorting unit, moving--. three optoelectronic transducers, a mechanically connected synchronization unit, and a motion control unit for optoelectronic transducers, the output of which is connected to the second input of the transportation unit, three base units of monitored parts, the inputs of which are connected to the second, third, and fourth outputs of the transportation unit, and electronic system consisting of a series-connected timer, television signal generator of the display unit, analyzer, control unit and processing Information about cylindrical surfaces, the first output of which is connected to the first input of the analyzer, and the second to the second input of the television signal generator, and two control units and processing information about the end surfaces, the first outputs of which are connected to the second and third inputs of the analyzer, and the second connected to the third and fourth inputs of the television signal generator, the second timer output connected to the first inputs of the control unit and processing information about the cylindrical surfaces and the first and second b control and processing of information on the end surfaces, the third outputs of which are connected to the first inputs of the respective, first and second optoelectronic converters, the outputs of which are connected to the second inputs of the corresponding control and processing blocks of the information on the end surfaces, processing of information on cylindrical surfaces is connected to the output of the third optoelectronic converter, the first input of which is connected to the third output of the control and processing unit information about the cylindrical surfaces, the second output of the optoelectronic converter movement control unit is connected to the second inputs of the first and second optoelectronic converters, and the third output to the second input of the third optoelectronic converter, the first output of the synchronization unit is connected to the third inputs of the first, 15th and second control units and processing information about the end surfaces, and the second output - with the third input of the control unit and processing information about the cylindrical surfaces, and the output The detector is connected to the% th input of the demarcation unit, characterized in that, in order to increase the reliability of the control by detecting internal and external chamfers and defects on them, two identical chains consisting of sequentially connected coordinate determination units are introduced into the electronic system and a digital comparator, the analyzer is made with a five input, the fourth and fifth inputs of which are connected to the outputs of the first and second comparators, the inputs of the first and second 0 five 70 o coarse coordinate determination units (connected to the fourth outputs of the first and second control units and processing information about the end surfaces, respectively. 2. The device according to claim 1, characterized in that, in order to expand the range of controlled parts, by rebuilding the defective criteria for the surfaces of the parts, it is equipped with a tuning unit, the input of which is connected to the third output of the synchronization unit, the first output is connected to the third input of the control unit and processing information about the cylindrical surfaces, and the second output is connected to the second input of the third optoelectronic converter. 7 Figg vidb Type A Fi.Z 4 (5.6) 28 see Fig 5 32 y-y fiyo.7 Fig 8 FIG Yu view 38 Fig 9 Phie 11