Method and device for testing sheet articles

FIELD: measuring engineering.

SUBSTANCE: method comprises setting the article to be tested on the working table, moving the nonflatness meter, determining the amplitude of nonflatness, and determining coefficients of nonflatness. The device comprises source of light, multielement photodetector, objective, and computer.

EFFECT: enhanced reliability.

5 cl, 7 dwg

 

The invention relates to sheet rolling production, and more specifically to methods and means for measurement and control of geometrical parameters of sheet products, and can be used for automated inspection and sorting of sheet metal, and other similar items.

The known method of controlling the flatness of sheet products [1], namely, that place controlled sheet product on a stationary desktop with a flat surface, move the meter flatness on the surface of the sheet product parallel to the plane of the working table, determine the amplitude flatness of sheet products, allocate a local maximum values that map to a valid value of the amplitude flatness.

This method is implemented using known from the same source [1] controls the flatness of sheet products, comprising a fixed Desk with a flat surface for placing a controlled sheet products, measuring flatness, consisting of an indicator, mounted on the bracket and arranged to move parallel to the surface of the desktop.

This method and the appropriate means for its implementation based on the determination of the removal of the surface from a given surface. the x cons: low accuracy of measurement of flatness, low productivity of the employee performing the measurement, which leads to a lack of quality control sheet items due to the small control sample of the batch.

In addition, all the operations starting from the measurements and to fix the values of parameters are performed manually, which is tedious for a human process.

The known method of controlling the flatness of sheet products [2], namely, that place controlled sheet product on a stationary desktop with a flat surface, move the meter flatness on the surface of the sheet product, determine the amplitude flatness of sheet products, allocate a local maximum values that map to a valid value of the amplitude flatness.

This method is implemented using known from the same source [2] controls the flatness of sheet products, comprising a fixed Desk with a flat surface for placing a controlled sheet products, measuring flatness, consisting of a measuring line and Converter amplitude flatness, comprising a rod for measuring amplitude flatness fixed in the grooves of the measuring line can move in the vertical ploskostei articulated through the gear-rack transmission with the input axis of the transducer amplitude flatness, which is fixed in the upper part of the measuring line, and to the lower part of the axis of the transducer attached resistor element made of thin wire wound on a frame in the form of a plate of insulating material, and two sets of contacts made with circuit resistor element in contact with sheet products and interconnected and the potentiometer, the output of which is connected to the first input device data pre-processing, a second input connected to the output of measuring the flatness and the output to the input of the computing device, registration and visualization.

The disadvantage of this method and the appropriate means for its realization is the low information content of the measurements, due to the fact that the value of the flatness of the sheet product is judged on the basis only of the local maximum values of the amplitudes of its flatness.

In addition, the disadvantages of funds for the implementation of this method are rapid wear of the contacts resistive sensor when the friction controlled sheet product, contamination and oxidation during operation under the influence of external influences that ultimately leads to a decline in the reliability of this tool, incorrect or inaccurate results measure and control.

It should also be noted that these contacts resistive sensor are complex and expensive elements, as they usually have silver or gold plating to improve contact with the element resistance and increased resistance to oxidation.

The closest to the proposed invention the technical essence is a way of controlling the flatness of sheet products [3], namely, that place controlled sheet product on a stationary desktop with a flat surface, move the meter flatness on the surface of the sheet product, determine the amplitude flatness of sheet products, allocate a local maximum and a local minimum value, and the value of the flatness controlled sheet product is defined as:

where

(p,q) - coordinates of a point on the surface of the sheet product, the corresponding local maximum value of the amplitude flatness of sheet product;

(v,w) and (r,s) - coordinates of neighboring points on the surface of the sheet product, the corresponding local minimum amplitude values of the flatness of sheet product;

andpq- the value of the local maximum amplitude flatness of the sheet product at the point on its surface with coordinates (p,q)

t(v,w),(r,s)- the distance between the points with coordinates (v,w) and (r,s) on the surface of the desktop (the period of flatness);

and compare the obtained values of the coefficients of the flatness of the sheet product with a valid value of the coefficient of flatness.

This method is implemented using known from the same source [3] controls the flatness of sheet products, comprising a fixed Desk with a flat surface for placing a controlled sheet products, measuring flatness, consisting of a ruler and converters amplitude and period of flatness, the pre-processing unit information, the input of which is connected to the outputs of the measuring flatness, and the computing device, the registration and visualization, the inputs of which are connected to the outputs of the device pre-processing, the pre-processing unit information contains the block allocation of local maximum and local minimum values of the amplitude flatness, the inputs of which are the first inputs pre-processing information, and the block of defining relations, the first inputs of which are the second input device data pre-processing and second inputs connected to the outputs of block allocation of local maximum and local minimum values of the amplitude flatness, thus the outputs of the block defining relations are the outputs of the device pre-processing.

The main difference of the invention [3] in the invention [2] is the presence of the transducer period flatness.

The disadvantage of this method [3] and the corresponding tools [3] for its implementation is that the calculated coefficient of flatness kp,qsheet product value averaged for the respective area and did not accurately reflect his "waviness".

In addition, the principle of operation controls for the implementation of this method, as well as the previous one, based on direct contact of the measuring flatness controlled sheet product. It is known that the contact means of control are characterized by low accuracy and reliability of testing results, low speed (capacity) and reliability, complexity achieve the full automation of control processes.

The objective of these inventions are:

a) receiving in the control process is the most complete information about the flatness of the investigated leaf products;

b) exception when measuring the direct contact of the measuring flatness controlled sheet product;

C) facilitating conditions for the reception and kind of the Chi-sheet items, by the conclusion of measuring the flatness of the area above the surface of the desktop upon completion of the measurement;

g) increasing the accuracy, reliability measurements, and performance (speed, speed) controls;

d) increasing the level of automation of control processes sheet items, by performing desktop with the possibility of transporting sheet goods while loading and unloading controls.

In order to achieve these technical results, the proposed method of control the flatness of sheet products consisting in that place controlled sheet product on a stationary desktop with a flat surface, move the meter flatness determine amplitude flatness of sheet products, allocate a local maximum and a local minimum value, which determine the coefficients of the flatness of sheet products, compare obtained values of the coefficients flatness with a valid value of the coefficient of flatness of the sheet product, and before (after) placing the sheet product on the desktop move the meter flatness in the measurement area at a specified distance from desktop and parallel to its surface, direct with measuring flatness on the surface of the working table (sheet products) of the probe light, taking on his position-obsticale photodetectors reflected from the surface of the working table (sheet products) light radiation, determined by measuring the coordinates of the light spots on a position-sensitive photodetector measuring the flatness of the distance from the measuring flatness to the surface of the working table (sheet products), output measurement is complete, measuring the flatness of the area measurements, and the values of amplitude flatness and coefficient of flatness of the sheet product is defined as

where

ax,y- amplitude flatness of sheet product, the corresponding point on the surface of the desktop with coordinates (x,y);

k(p,q),(r,s)is the coefficient of flatness of the sheet articles in the section between the points on the surface of the working table with coordinates (p,q) and (r,s);

Hx,yand hx,yrespectively the distances from the measuring flatness to the point of the surface of the desktop and sheet products with coordinates (x,y);

Δa(p,q),(r,s)the difference between the amplitudes of the flatness of the sheet product, corresponding to the points on the surface of the desktop with coordinates (p,q) and (r,s);

l(p,q),(r,s)- the distance between the points with coordinates (p,q) and (r,s) on the surface of your Desk;

(x,y) - coordinates of the points on the surface of the working table (sheet products);

(p,q) and (r,s) - coordinates of points on the surface R of the working table respective adjacent local maximum ap,qand the local minimum ar,sthe values of amplitude flatness of sheet product.

In order to achieve the said technical result of the proposed means of controlling the flatness of sheet products, comprising a fixed Desk with a flat surface for placing a controlled sheet products, measuring flatness, the pre-processing unit of the information input of which is connected to the meter output flatness, and the computing device, the registration and visualization, the first information input of which is connected with the information output device pre-processing, contains also installed on the rack moving device for measuring the flatness on the surface of the sheet product, made in the form of a two-tier mechanism with the plane of movement parallel to the surface of the desktop, the first link of the two-link mechanism pivotally connected at one end with rack, and the other end to the second link, while at the other end of the second link is selected measuring flatness, formed from a source of a narrow light beam, such as laser, multi-sensor and lens, and clock outputs of the device prior the second information processing are connected with the inputs of the measuring flatness, as the device calculation, registration, and visualization used a personal computer (PC) with a monitor and a printer, each of the links of the two-tier mechanism provided with a drive, managed PC, and a sensor of angular position, the outputs of which are connected to the second information inputs PC, and the ratio of the lengths of the first and second parts of a two-tier mechanism, taken equal to:

where L1and L2respectively the lengths of the first and second parts of a two-tier mechanism;

d and respectively the length and width of the flat surface of the work table;

- the minimum distance from the rack to the edge of the surface of a stationary desktop.

In addition:

in measuring the flatness of the multi-element photodetector is made in the form of photolyase, the inputs and output are respectively the inputs and output of measuring the flatness, and the lens is mounted with the possibility of a triangulation optical communication photolyase with a source of a narrow light beam through the surface of the desktop (controlled sheet products);

the pre - processing unit information contains the block selection signal, the input of which is the input of the pre-processing information, Faure, irovel code an information input connected to the output of the block selection signal, and outputs are outputs of the device pre-processing information, and scanner, the first outputs of which are clocked outputs of the device pre-processing and second outputs connected to the clock inputs of the driver code;

- each link in a two-tier mechanism provided with a counterweight placed on the opposite side from the hinge of the respective link;

- Desk is made with the possibility of transporting sheet goods while loading and unloading controls. For this purpose it is supplied frame with rubber rollers, placed in the grooves of the surface and managed from a PC drives lifting / lowering of the specified frame and the rotation of the rubber rollers.

The main features distinguishing the claimed method from the closest analogue (prototype), are:

- move the meter flatness in the measurement area at a specified distance from desktop and parallel to its surface before (after) the controlled placement sheet items on the desktop;

- the direction of measuring the flatness on the surface of the working table (sheet products) of the probe light beam;

- taking on his position-sensitivity is s photodetectors reflected from the surface of the working table (sheet products) light radiation;

- determination by measuring the coordinates of the light spots on a position-sensitive photodetector measuring the flatness of the distance from the measuring flatness to the surface of the working table (sheet products);

o upon completion of measuring the flatness of the zone of measurement;

- determination of the amplitude values of flatness according to (2);

- allocation on the surface of the desktop of points corresponding to the local maximum and local minimum values of the amplitude flatness of sheet product;

- determination of the coefficients of the flatness of a sheet product according to (3).

The main features distinguishing the claimed tool for the implementation of this method from the closest analogue (prototype), are:

- installed at the front of the device displacement measuring flatness on the surface of the controlled sheet products;

- execution of funds transfer in the form of a two-link mechanism with the plane of movement parallel to the plane of the working table;

- execution of the first component of the two-link mechanism pivotally connected at one end with a rack, and the other end to the second link, the other end of which is installed measuring flatness, formed from a source of a narrow light beam, such as a manhole is RA, multi-element photodetector and a lens;

- use as a computing device, the registration and visualization PC;

- supply of each of the links of the two-tier mechanism actuator, managed PC, and a sensor of angular position, the outputs of which are connected to the second information inputs PC;

- selection of lengths of the first and second parts of a two-tier mechanism in equation (4).

The presence of these features in the claimed method and device ensure their compliance with the conditions of patentability of "novelty."

This comparison not only with the prototype, but also other technical solutions in this and related fields of science and technology showed that the latter does not contain characteristics similar to the characteristics that distinguish the claimed technical solution from the prototype. A new set of essential features of the method and device for the specialist is not obvious from the prior art, thereby ensuring their compliance with the conditions of patentability "inventive step".

The present invention is illustrated by drawings, which depict:

figure 1 - functional diagram controls the flatness of a sheet product that implements the described method,

figure 2-5 - graphic materials explaining the described method and tool for the th realization,

figure 6, 7 - option simplified design of the desktop with the possibility of transporting sheet goods while loading and unloading controls.

Method of monitoring the flatness of sheet products are performed in the following sequence.

1. Before placing controlled sheet products on a stationary desktop with a flat surface place the measuring flatness in the measurement area, where it occupies the initial position corresponding to, for example, the point "T" in figure 3.

2. Move the meter flatness in a predetermined path and at a specified distance from the desktop, parallel to its surface.

3. Guide to measuring flatness on the surface of the working table of the probing light.

4. Take on a position-sensitive photodetectors measuring flatness reflected from the surface of your Desk light radiation.

5. Determined by measuring the coordinates of the light spots on a position-sensitive photodetector measuring the flatness variation of the distance Hifrom measuring flatness to the surface of the desktop.

6. Place controlled sheet product on the surface of the desktop.

7. Re-move the meter flatness in a predetermined path and at a specified distance from RA is Otsego table parallel to its surface, thereby eliminating direct contact of the measuring flatness controlled sheet product.

8. Guide to measuring flatness on the surface of the sheet products of the probing light.

9. Take on a position-sensitive photodetectors measuring flatness reflected from the surface of the sheet products of the light radiation.

10. Determined by measuring the coordinates of the light spots on a position-sensitive photodetector measuring the flatness variation of the distance hifrom measuring flatness to the surface of the sheet product.

11. Output measurement is complete, measuring the flatness of the measurement zones, facilitating conditions for subsequent unloading and loading controls.

12. Determine the values of the amplitude flatness of sheet products as

13. Allocate on a flat surface desktop point corresponding to a local maximum of ap,qand the local minimum ar,sthe values of amplitude flatness of sheet product.

14. Determine the coefficients of the flatness of sheet products as

15. Compare the values obtained coefficients flatness with a given value of the coefficient is of ecient flatness of sheet product, the results of which are judged under controlled sheet products specified tolerances.

This sequence of method is implemented by the means described below.

The means of controlling the flatness of sheet products contains (1) a fixed Desk with 1 flat rectangular surface 2 for the controlled placement of sheet articles 3, 4 meter flatness, unit 5 pre-processing, the input 6 and clock outputs 7 which are connected respectively to the output 8 and 9 meter 4 flatness, the device 10 calculation, registration, and visualization, the first information input 11 which is connected to the output 12 of the device 5 data pre-processing, and installed on the rack device 13 14 displacement meter 4 flatness over the surface 2 desktop 1 (sheet product 3), made in the form of a two-tier mechanism with the plane of movement parallel to the front surface 2 desktop 1.

The first link 15 two-link mechanism pivotally connected at one end with a rack 13, the other end of the second link 16. At the other end of the second link 16 is rigidly fixed to the meter 4 flatness, formed from a source of a narrow light beam, such as laser 17, the multi-element position-sensitive is fotopriemnika, for example, photolyase 18 and lens 19. The lens 19 is installed with the possibility of a triangulation optical communication photolyase 18 with laser 17 through the surface 2 desktop 1 (surface controlled sheet product 3).

As the device 10 of the calculation, registration, and visualization used a personal computer (PC) 20, a monitor 21 and a printer 22.

Each of the links 15 or 16 two-tier mechanism provided with a counterweight 23, placed on the opposite side from the hinge 24 of the corresponding link, the actuator 25, the inputs 26 of which is connected to the control outputs 27 of the device 10 calculation, registration, and visualization, and the sensor 28 angular position, the outputs 29 which is connected to the second information inputs 30 of the device 10 calculation, registration, and visualization.

The first and second information inputs and control outputs of the PC 20 are respectively first and second information inputs and control outputs of the device 10 calculation, registration, and visualization.

Unit 5 pre-processing information includes a block 31 of the selection signal, the input of which is the entrance 6 of the device 5 data pre-processing, the imaging unit 32 of the code, an information input connected to the output unit 31 sidelinevideo, and outputs are information output device 12 5 data pre-processing, and the block 33 scanner, the first outputs of which are clocked outputs 7 of the device 5 data pre-processing and second outputs connected to the clock inputs of the driver 32 of the code.

Structurally, the device 5 preliminary information can be placed in the meter body 4 flatness.

The space between the flat surface 2 desktop 1 and the plane of movement of two-tier mechanism forms a zone of measurement.

The device 14 to move the meter 4 flatness must provide:

- move the meter 4 flatness in the measurement area at a given distance from the surface 2 desktop 1 without direct contact with a controlled sheet product 3 and in a predetermined path,

to ensure the output meter 4 flatness of the area measurements upon completion of the measurement ("Parking").

These requirements are met by two-tier mechanism. The ratio of the lengths of the first 15 and second 16 links a two-tier mechanism corresponds to:

where L1and L2accordingly, the length of the first 15 and second 16 links a two-tier mechanism;

d and respectively the length and width of the rectangular surface 2 the working table 1;

- the minimum distance from the rack 13 to the edges of the surface 2 desktop 1 (1, 2).

This equation (7) arises from the requirement to design a two-tier mechanism, which is that for the meter 4 flatness should not be "invisible" areas on the surface 2 desktop 1.

This requirement is ensured when the following three conditions:

(a) two-tier mechanism should "reach out" to the most distant points of the surface 2 desktop 1. This condition can be analytically expressed as :

where L is the distance from the rack 13 to the farthest from her point surface 2 desktop 1 (to the point "And1" in figure 2);

b) the meter body 4 flatness, having certain dimensions, should not transfer to hurt rack 13, therefore, the latter must be installed at a distance "C" from the edge surface 2 desktop 1;

C) two-tier mechanism should also "reach out" to the point "And2under part 15. This condition can be analytically expressed as :

By the Pythagorean theorem

Substituting in (10) value (9), we obtain:

Solving this quadratic equation L 1get

Taking into account (9) we have

Counterweights 23 are designed to balance the lateral bending forces acting on the hinges 24.

Option simplified design desktop 1 with the possibility of transporting sheet items 3 when loading and unloading control means shown in Fig.6, 7.

Desk 1 is equipped with a frame 34 with rubber rollers 35 (6), placed in the slots 36 of its surface 2 and managed from the PC 20 drives the lifting-lowering of 37 the specified frame 34 and rotation 38 of rubber-coated rollers 35 (Fig.7). Bus 39 - output device 10 of the calculation, registration, and visualization, providing control of these actuators 37 and 38.

Before you begin tools in the PC 20 is entered, the program of measurement and control, including the corresponding path of the probe 4 in the measurement area (scanning trajectory meter 4 surface 2 desktop 1 (sheet product 3)), as well as the necessary source data, including tolerance kSS(or group of tolerances of the coefficient of flatness, if you are sorting sheet products 3 for different values of the coefficient of flatness).

The job control sheet products takes place in five stages:

a) the first stage - the stage of measuring distances Hifrom 4 meter to the surface 2 desktop 1;

b) the second stage is the stage of placement of controlled sheet articles 3 on the surface 2 desktop 1;

C) the third stage - the stage of measuring distances hifrom 4 meter to the surface of the sheet articles 3;

d) the fourth stage output meter 4 from the zone of measurement;

e) the fifth stage is the stage of the calculations according to (21)-(31) and comparing the obtained results with the given tolerance (tolerance).

The first stage of the work takes place before placing the sheet articles 3 on the surface 2 desktop 1 and begins with issue with the PC 20 signal installation, in which all the blocks and devices of the implementation of the method are set to the initial state "0" (on drawings installation scheme "0" conditionally not shown).

At the same time by signals from the control output 27 of the device 10, the actuator 25 with sensors 28 provide the rotation links 15 and 16 two-tier mechanism on the magnitude of the angles at which the meter 4 flatness is moved to the measurement area, and occupies its original position, for example, corresponding to the point "T" in figure 3, and then starts to move in a predetermined path.

Further work controls based on the principle of optical triangulation. The laser light 17 measure concentration is El 4 flatness is directed at the surface 2 a stationary desktop 1.

Diffuse (diffuse) radiation from the surface 2 is focused by the lens 19 on photolyase 18 in the form of a light spot.

Block 33 scanner generates clock pulses that control the optoelectronic converting the image light spot on photolyase 18.

This transformation changes the coordinates of the light spot on photolyase 18 is proportional to the change in surface profile 2 desktop 1. The image of the light spot causes changes in the levels of stress in the individual cells, resulting in the distribution of the output signals of the photodiode cells in a time when reading is proportional to the spatial distribution of light intensity over the cross section of the light spot on photolyase 18.

Information signals from the output 8 of the meter 4 flatness come through the entrance 6 of the device 5 pre-processing on the input block 31 selection signal and further to the input of the shaper 32 code.

Shaper 32 code provides a measurement of time from the beginning of the survey photolyase 18 until the middle of the video impulse coming from the block 31, which is equivalent to the distance from the beginning of photolyase 18 to the energy center of the light spot. As a result, the block 32 is formed digital equivalent of the measured value of the distance H1.

Measurement of mn is ing H 1is completed by rewriting its code into the memory of the PC 20. At the same time in the memory of the PC 20 from the sensors 29 angular movements are recorded corresponding H1codes angles α1and β1rotation respectively of the links 15 and 16 (see figure 5).

In the future, as you move the meter 4 flatness in the area of the measurement procedure described above, measure the distance from the measuring device 4 to the surface 2 of table 1 repeats and ends remembering in the PC 20 three sequences:

where i is a set number of measurement distance N;

(Hithat αithat βi- spatial coordinates of a point on the surface 2 desktop 1, by the distance to the surface 2 and the rotation links 15 and 16.

The second stage of the operation means is controlled placement of sheet articles 3 on the surface 2 desktop 1;

The third stage means also begins with issue with the PC 20 signal installation, in which all the blocks and device controls are set to the initial state "0". At the same time by signals from the control output 27 of the PC 20, the actuator 25 with sensors 28 provide the rotation links 15 and 16 two-tier mechanism n is the size of the angles, when the meter 4 flatness occupies its original position, for example, corresponding to the point "T" in figure 3, and then starts to move in a predetermined path.

Subsequent work controls also is based on the principle of optical triangulation. The laser light 17 meter 4 flatness is directed at the surface of the sheet product 3.

Diffuse (diffuse) radiation from the surface of the sheet product 3 is focused by the lens 19 on photolyase 18 in the form of a light spot.

While in the above-mentioned block 32 is formed digital equivalent of the measured value of h1. The measurement values of h1is completed by rewriting its code into the memory of the PC 20. At the same time in the memory of the PC 20 from the sensors 29 angular movements are recorded corresponding h1codes angles α1and β1rotation respectively of the links 15 and 16.

In the future, as you move the meter 4 flatness in the area of the measurement procedure described above, measure the distance from the measuring device 4 to the surface of the sheet articles 3 repeats and ends remembering in the PC 20 three sequences:

where (hithat αithat βi- protrans the public coordinates of a point on the surface of the sheet articles 3, presented through the distance to the surface and the angles of rotation links 15 and 16.

In the fourth stage of tool operation is carried out for the 4 meter from the zone of measurement. At the same time in the PC 20 is implemented the fifth stage of operation of the described controls.

First is the translation of (16) and (17) of the "corner" of the system in rectangular (Cartesian) coordinate system according to the formulas (see figure 5):

This leads to the appearance of two sequences:

Surface 2 desktop 1 scanned by the probe 4 has a rectangular shape (figure 2, 3). It is obvious that the obtained sequence (15) and (18) can also be arranged for convenience in the form of two rectangular matrix whose m columns and n rows:

Further values are calculated amplitude flatness as

forming a third rectangular matrix:

By comparison in this matrix, each value but with a neighboring values are allocated to their local maximum and local minimum values. As a result, the surface sheet 2 is the products view 3 represented in the form of sequential local maximum and local minimum values of amplitude flatness ("hilltop" and "bottom troughs").

In other words, on the surface of the sheet articles 3 each local maximum amplitude will be in the neighborhood of the local minimum amplitude and Vice versa.

For each local maximum amplitude in its environment" vapours "local maximum value of ap,qlocal minimum value of ar,s". For each such pair are calculated:

- increment amplitude:

where (p,q) and (r,s) - coordinates of the specified pair of points (figure 4);

- the distance between the points with coordinates (p,q) and (r,s) on the surface of the working table 1 according to the formula [4]:

-

is the coefficient of flatness:

The fifth stage is completed by the Association (by comparison) in the PC 20 calculated values of kthe calcwith a valid value of kSS(tolerance). If the calculated values of the coefficient of flatness variation outside the tolerance, they make up for this controlled sheet articles 3 set of deviations such geometrical parameter as a variation of flatness and can be output to the printer 22 and/or displayed on the monitor 21 in terms of the relevant Protocol specifying the coordinates of points (p,q) and (r,s)which is beyond tolerance.

Under the cut is litecam this comparison can be done sorting and culling of sheet metal, and other similar items.

Due to the fact that the distance Hx,yremain almost constant from measurement to measurement and their values are stored in the PC 20, it may be a new dimension (updating), for example, only after the next adjust, repair, in the beginning of a shift, etc.

In the case of use in the control of the desktop 1 with sheet transport devices (6, 7) determination of the distances of Hx,yis same as above. Obviously, those parts of the surface 2 of table 1, where the notches 36, the measured N will be substantially different in magnitude from Hx,yobtained in areas that do not contain the slots 36. Specified, you can programmatically in the PC 20 can be excluded from further calculations, for example, by removing the corresponding columns of the matrix (25).

The width of the slots 36 is chosen much smaller than the desktop 1 and sheet products 3, so they do not have a significant impact on the results of the control.

When the monitoring tool does not work, rubber rollers 35 are recessed in grooves 36 of the surface 2 desktop 1.

When receiving sheet items 3, the control signals at the outputs 39 device 10 includes a feeder of a sheet product (not shown) and simultaneously act on the actuators 37 and 38. As a result of this rubber role and 35 begin to rotate, the frame 34 outputs them from the slots 36, lifting above the surface level 2 desktop 1. Rubber rollers 35 "capture" of the supplied sheet product 3 and move it over the surface 2 desktop 1. Such movement is stopped when the front edge of sheet articles 3 will reach a limit switch (not shown) and turn it off. The signals from the outputs 39 and the rubber rollers 35 cease to rotate and drive 37 outplay them in the slots 36 of the surface 2 desktop 1. Sheet product 3 is placed on the surface 2 desktop 1.

Removing the sheet articles 3 from the surface 2 desktop 3 is the same way. The control signals at the outputs 39 device 10 includes a device receiving sheet items (not shown) and simultaneously act on the actuators 37 and 38. As a result of this rubber rollers 35 rotate, and the frame 34 outputs them from the slots 36, lifting above the surface level 2 desktop 1. Rubber rollers 35 "capture" remove sheet product 3, move it over the surface 2 desktop 1 and passed to the device receiving sheet of the product. After the withdrawal of sheet articles 3 on the signals from the outputs 39 and the rubber rollers 35 cease to rotate and drive 37 outplay them in the slots 36 of the surface 2 desktop 1.

So about what atom, the proposed set of essential features of the invention allows to:

a) to receive the control process is the most complete information about the flatness of the investigated leaf products. Thus, according to figure 4, the coefficient of flatness between points F1and F3the prototype [3] is determined through a period of flatness:

i.e. represents some average value, characterizing the variation of flatness in the interval (v,w), (r,s).

In the proposed invention in the specified interval of sheet product is characterized by two values of the coefficient of flatness:

The first of these values characterizes the rate of rise, and the second - speed "descent" surface of the sheet articles in relevant areas, i.e. in the proposed invention the same part of the sheet product is characterized by a large number of factors and each of them bears more than a prototype, information about the geometry of the sheet;

b) to exclude measurement errors, the algorithm controlling the operation of subtraction (2), due to the fact that in reality the plane of movement of the meter is not absolutely parallel to the surface of the desktop, which, in turn, is characterized definitely is the roughness of the surface;

C) be excluded when measuring the direct contact of the probe with controlled sheet product, which increases, in particular, accuracy, reliability of the measurement results, and the speed control sheet products;

g) to provide the output of measuring the flatness of the measurement spot at the end of stages dimensions than eased the conditions for transporting sheet goods while loading and unloading controls. In the extracted condition measuring flatness can be in point "Parking" And3(figure 2);

d) to increase the level of automation of control processes of sheet products through the implementation of a desktop with the possibility of transporting sheet goods while loading and unloading controls.

The above information proves the conformity of the invention the condition of patentability "industrial applicability". In particular, this method and the means for its implementation is to be used in JSC "upper Salda metallurgical production Association" the Sverdlovsk region to control the flatness of titanium sheet metal.

SOURCES USED.

1. GOST 26877-91 (USSR). Metal products. Methods of measuring the deflection shape. The official publication. The Committee on standardization and Metrology of the USSR. Publisher the creation of standards. 1991, pp.2-4, section 3.2.-(4).

2. USSR author's certificate No. 1754250. Device for controlling the strip flatness. IPC 21 In 37/00. Publ.: B, No. 30, 1992.

3. RF patent № 2085313. Device for controlling and measuring the flatness of the car. IPC 21 In 38/02. Publ.: BIPM, No. 21, 1997 (the prototype).

4. Korn G., Korn T. Handbook of mathematics for scientists and engineers. Definitions, theorems, formulas. M.: Nauka, 1968, p.53, f-La 2.1-1.

1. Method of monitoring the flatness of sheet products consisting in that place controlled sheet product on a stationary desktop with a flat surface, move the meter flatness determine amplitude flatness of sheet products, allocate a local maximum and a local minimum value, which determine the coefficients of the flatness of sheet products, compare obtained values of the coefficients flatness with a valid value of the coefficient of flatness of the sheet product, characterized in that before (after) placing the sheet product on the desktop move the meter flatness in the measurement area at a specified distance from desktop and parallel to its surface, with direct measuring of flatness on the surface desktop (sheet products) of the probe light, take n is its position-sensitive photodetectors reflected from the surface of the working table (sheet products) light radiation, determined by measuring the coordinates of the light spots on a position-sensitive photodetector measuring the flatness of the distance from the measuring flatness to the surface of the working table (sheet products), output measurement is complete, measuring the flatness of the area measurements, and the values of amplitude flatness and coefficient of flatness of the sheet product is defined as

ax,y=Nx,y-hx,y,

where ax,y- amplitude flatness of sheet product, the corresponding point on the surface of the desktop with coordinates (x,y);

k(p,q),(r,s)is the coefficient of flatness of the sheet articles in the section between the points on the surface of the working table with coordinates (p,q) and (r,s);

Hx,yand hx,yrespectively the distances from the measuring flatness to the point of the surface of the desktop and sheet products with coordinates (x,y);

Δa(p,q),(r,s)the difference between the amplitudes of the flatness of the sheet product, corresponding to the points on the surface of the desktop with coordinates (p,q) and (r,s);

l(p,q),(r,s)- the distance between the points with coordinates (p,q) and (r,s) on the surface of your Desk;

(x,y) - coordinates of the points on the surface of the working table (sheet products);

adjacent local maximum andp,qand the local minimum ar,sthe values of amplitude flatness of sheet product.

2. The means of controlling the flatness of sheet products, comprising a fixed Desk with a flat surface for placing a controlled sheet products, measuring flatness, the pre-processing unit of the information input of which is connected to the meter output flatness, and the computing device, the registration and visualization, the first information input of which is connected with the information output device pre-processing, characterized in that it contains installed on the rack moving device for measuring the flatness on the surface of the sheet product, made in the form of a two-tier mechanism with the plane of movement parallel to the surface of the desktop, the first link of the two-link mechanism pivotally connected at one end with a rack, and the other by the end of the second link, while at the other end of the second link is selected measuring flatness, formed from a source of a narrow light beam, such as laser, multi-sensor and lens, and clock outputs of the device tentatively the visual information processing are connected with the inputs of the measuring flatness, as the device calculation, registration, and visualization used a personal computer (PC) with a monitor and a printer, each of the links of the two-tier mechanism provided with a drive, managed PC, and a sensor of angular position, the outputs of which are connected to the second information inputs PC, and the ratio of the lengths of the first and second parts of a two-tier mechanism is assumed to be

where L1and L2respectively the lengths of the first and second parts of a two-tier mechanism;

d and respectively the length and width of the flat surface of the work table;

- the minimum distance from the rack to the edge of the surface of a stationary desktop.

3. The monitoring tool according to claim 2, characterized in that the measuring flatness of the multi-element photodetector is made in the form of photolyase, the inputs and output are respectively the inputs and output of measuring the flatness, and the lens is mounted with the possibility of a triangulation optical communication photolyase with a source of a narrow light beam through the surface of the desktop (controlled sheet products).

4. The monitoring tool according to claim 2, characterized in that the pre-processing unit information contains the unit of allocation is videosignal, which input is the input of the pre-processing information, driver code, an information input connected to the output of the block selection signal, and outputs are outputs of the device pre-processing information, and scanner, the first outputs of which are clocked outputs of the device pre-processing and second outputs connected to the clock inputs of the driver code.

5. The monitoring tool according to claim 2, characterized in that each of the links of the two-tier mechanism provided with a counterweight placed on the opposite side from the hinge of the corresponding link.

6. The monitoring tool according to claim 2, characterized in that the working table is made with the possibility of transporting sheet goods while loading and unloading controls.

7. The monitoring tool according to claim 6, characterized in that the Desk is equipped with a frame with rubber rollers, placed in grooves in its surface, and managed from a PC drives lifting / lowering of the specified frame and the rotation of the rubber rollers.



 

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