RU1821262C - Method and device for determination of diameter of strip material roll in winding or unwinding the strip - Google Patents

Abstract

Usage: in the field of automation of rolling production. SUBSTANCE: during operations with a strip of strip material, changes in the angle of the roll are controlled by the counted 4 pulses of the sensor 3 mounted on the axis of the coiler (unwinder), according to which the set value equal to the diameter of the measuring roller is stored in memory unit 7 the value calculated by the counter of 2 measuring pulses is fixed. roller corresponding to the diameter of the roll. 2 s.p. f-ls, 1 ill.

Description

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The invention relates to the field of rolling production, namely, automation of rolling and sheet-cutting processes / and can be used to determine the diameter of the unwinding or reeling roll of any strip material.

. The closest to the proposed method in terms of technical nature and the achieved result is a method for measuring the diameter of an unwinding roll, a metal strip (2).

In accordance with the specified method, the angle of rotation of the roll is determined, determined by the formula:

f-360 Lp / jr n. (1)

where L0 is the circumference of the measuring roller;

p is the number of pulses per revolution of the pulse Sensor displacement of the strip,

record the number of pulses received from the pulsed strip displacement sensor during the roll rotation by a predetermined angle, which corresponds to the diameter of the roll.

- The closest in technical essence and the achieved result to the proposed device is a device that implements the known method, containing a pulse sensor of the angle of rotation of the measuring roller mounted on the axis of the measuring roller, a pulse counter of the angle of rotation of the measuring roller, as well as two non-contact sensors for fixing a given angle of rotation roll.

The disadvantages of the known technical solution (method and device) can be from00

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bear that when changing the diameter of the measuring roller, for example, due to its wear, it is necessary to recalculate the value of the specified angle of rotation of the roll and, in addition, installing proximity sensors at a given angle is a very time-consuming operation. All this complicates the implementation of this technical solution and helps to reduce the accuracy of determining the diameter of the roll.

In addition, within the framework of the known technical solution, it is possible to determine the diameter of the roll only once; per revolution of the roll, which reduces the reliability of the data obtained when using it, and there is no possibility of determining the diameter of the roll when reversing the winder or unwinder, which reduces the functionality and scope of this technical solution. : The aim of the invention is to simplify the process and increase the accuracy and reliability of determining the diameter of the roll, as well as expanding the functionality and scope.

The goal is achieved in that in the method in which the angle of rotation of the roll is set and the angle of rotation of the measuring roller is fixed during the rotation of the roll by a predetermined angle, while the diameter of the roll is numerically equal to the fixed value of the angle of rotation of the measuring roller, additionally, the value of the angle of rotation of the roll is set numerically equal to the diameter of the measuring roller. . In addition, the device containing a pulse sensor of the angle of rotation of the measuring roller mounted on the axis of the measuring roller, the output of which is connected to the counting input of the pulse counter of the angle of rotation of the measuring roller, further comprises a pulse sensor mounted on the axis of the measuring roller (unwinder), pulse counter of the angle of rotation of the roll, setter. a delay element and a memory unit, wherein the output of the pulse sensor mounted on the axis of the coiler (unwinder) is connected to the input of the roll counter of the angle of rotation of the roll, the input of the threshold for the operation of the counter of the roll angle of rotation of the roll is connected to the output of the sensor. and the output - with the input of the counter reset pulse counter of the angle of rotation of the roll and through the delay element - with the input of the counter reset pulse counter of the angle of rotation of the measuring roller, the information output of which is connected to the input of the memory unit,

whose input is connected to the output of the pulse counter of the angle of rotation of the roll. The drawing shows a block diagram of a device that implements the proposed

way.

The device contains a pulse sensor 1 of the rotation of the measuring roller mounted on the axis of the measuring roller, the output of which is connected to the counting input

counter 2 pulses of the angle of rotation of the measuring roller, a pulse sensor 3 mounted on the axis of the coiler (unwinder), the output of which is connected to the counting input of the counter 4 pulses of the angle of rotation of the roll, the input of the threshold setting which is connected to the output of the setter 5, and the output to the reset input counter 4 pulses of the angle of rotation of the roll and through the element 6 of the delay with the control input of the counter 2 pulses of the angle of rotation of the measuring roller, the information output of which is connected to the input of the memory unit 7, the control input of which. connected to counter A output

pulses of the angle of rotation of the roll.

The offer is based on the following premises:.

The linear speed Vn of the strip on the roll generatrix can be expressed

through the angular speed Wpyn of rotation of the roll and its diameter Orul:

Vn Wpyn Dpyn / 2.

(2)

When winding or unwinding strips with tension, the speed of movement of the strip under the measuring roller is equal to the speed of movement of the strip on the roll generatrix and can be expressed in terms of angular velocity

WMP measuring roller rotation and its diameter OMr:

  Omr / 2.

(3)

Equating the right parts of expressions (2) and (3) and highlighted the diameter of the roll, we obtain:

Orul-Mmr Omr / Wpyo. (4) Keeping in mind that:

WMp fMp / t, (5)

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So what:

Wpyn fpyn / t.

(6)

where fMp and fpyA, respectively, the rotation angles of the measuring roller and roll, and t is the time coordinate, and substituted expressions (5) and (6) into expression (4), we obtain:

) rulv mr dup / fpyn

We take into account in expression (7) the dimensions of the quantities entering into it (for example, mm and angular degrees) and keep in mind that:

(8)

  1mm

  1 deg.,

where Kdmr and Cupr, respectively, dimensionless coefficients of the diameter of the measuring roller and the angle of rotation of the roll / we get:

Orul (mmNmr (f.) Kdmr

1 mm / (КУпр) 1 gr.). (10)

From the expression (10) it is seen that, choosing the Coefficient coefficient equal to KDMr, i.e. by setting the roll rotation angle numerically equal to the diameter of the measuring roller, expression (7) can be simplified:

Dpyfl fMp (mm).

In order to confirm the operability of the proposed method, the following example can be given in which the process of determining the diameter of a roll on an uncoiler is simulated.

Let the diameter of the roll on the unwinder be 1600 mm and the diameter of the measuring roller 190 mm. The accepted value of the Diameter of the roll is used only to calculate the length of the strip left the roll.

 In accordance with the proposed method, we set the angle of rotation of the roll equal to 190 degrees. Then the length of the strip that came off during the rotation by a given angle from the roll of the strip:

U-fpy /. Orul / 2- (190 / 57.29582) 1600/2 -2652, 89859mm. . Roller circumference: Zf ZL4159 190 596.90210mm.

The number of revolutions of the roller during the passage under it of a section of a strip of length

NMP 2652.89859 / 596.90210 4.44445. which in terms of angular degrees is:

44445 360 1600,00022 degrees

In accordance with the proposal, the last calculated value is numerically 10 equal to the diameter of the roll, i.e. mm

When implementing the proposed method using pulsed sensors, the angles of rotation of the roll and measuring roller can be expressed in terms of the number of pulses received from the pulse sensor when the roll or measuring roller is rotated by a certain angle. If you use pulse sensors with the same number of pulses per revolution, then expression (11) can be converted to:

fifteen

twenty

.

(12)

25

thirty

35

40

45

fifty

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where NMP is the number of pulses accumulated by the pulse counter of the angle of rotation of the measuring roller during the rotation of the roll by a given angle.

Expression (12) is the basis of the device that implements the proposed method- The device operates as follows ..:; . . . -. - .. /

At the output of the setter 5 there is always a value of the threshold of operation of the counter 4, numerically equal in number of pulses to the diameter of the measuring roller, upon reaching which the counter 4 generates a signal at its output, which zeroes it and starts again, through which the instantaneous the accumulated value of counter 2 and which, after the time interval necessary for transferring the value from counter 2 to the memory unit 7, will reset the counter 2. The memory unit 7. during the entire operating time of the device contains the value of ra roll yuschees updated each time the counter reaches a threshold 4 notation.

Counters 2 and 4 are made non-reversible, i.e. they summarize the number of pulses arriving at their counting inputs, regardless of the direction of rotation of the pulse sensors, which allows the use of this device without any reconfiguration on units where the direction of rotation of the roll can

change, for example, on reversing countries., ..; ....

When using pulse sensors with a large number of pulses per revolution, the roll diameter determination process can be repeated several times during one roll revolution, for example, if the pulse sensor has 1000 pulses per revolution and the measuring roller diameter is 100 mm, then the roll diameter determination process during one revolution it is repeated 10 times, 4to increases the reliability of the received information about the diameter of the roll when it is used, for example, to calculate the moment of the start of braking of the unit, which includes talca (unwinder).

Thus, the proposed method allows to simplify the process of determining the diameter of the roll, since it does not require multiplication and division operations, to improve accuracy, since it eliminates the need to install roll angle sensors, and facilitates and simplifies the reconfiguration of the device when correcting wear of the measuring roller.

The proposed device allows to increase the reliability of the received information about the diameter of the roll when using it, because it makes it possible to determine the diameter / roll with a higher frequency compared to the t prototype, and also expands the functionality and scope, since it can also work correctly when reversing the winder ( unwinder}.

FORMULA AND ZOBRETEN

1. The method of determining the diameter of the roll of strip material when winding or

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uncoiling the strip, in accordance with which the angle of rotation of the roll is set and the angle of rotation of the measuring roller is fixed during the rotation of the roll by a predetermined angle, while the diameter of the roll is numerically equal to the fixed value of the angle of rotation of the measuring roller, therefore, that the value of the angle of rotation of the roll is set numerically equal to the diameter of the measuring roller.

2. A device for determining the diameter of a roll of strip material when winding or unwinding a strip, comprising: a pulse sensor for measuring angle of rotation of the measuring roller mounted on the axis of the measuring roller; and a counter of pulses of the angle of rotation of the measuring roller, wherein the output of the sensor of the angle of rotation of the measuring roller is connected to a counting input of a counter of pulses of the angle of rotation of the measuring roller, characterized in that it is equipped with a pulse sensor of the angle of rotation of the roll mounted on the axis of the coiler 5 (unwinder), an angle pulse counter the rotation of the roll, the setter, the delay element and the memory unit, and the output of the pulse sensor of the angle of rotation of the roll is connected to the counting input of the pulse counter i of the angle of rotation of the roll, the threshold of operation of the counter of the roll angle of the pulse counter is connected to the output of the setter, and the output, with the input of the roll counter of the roll angle of the roll and through the delay element, with the input of the reset of the pulse counter of the angle of the measuring roller, whose information output is connected to the input of the memory unit the input of which is connected to the output of the pulse counter of the angle of rotation of the roll,

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