SU1013740A1 - Device for measuring length of material in winding thereof on drum - Google Patents

Abstract

A DEVICE FOR MEASURING THE LENGTH OF A MATERIAL WHILE WINDING ON A DRUM contains a tangent rolls, a diametrically connected transducer of the tilting rolls of the tangent rolls, a gauge of material in the tangent rolls, a calculator and a registering unit associated with it h. y. e e with the fact that with. In order to improve the measurement accuracy, it is equipped with a measuring roll (com) and kitaematically connected with it. A converter of the angle of rotation of the measuring roller, connected in series by the unit. multiplier, frequency comparator and selector, the output of the rotation angle converter of the measuring roller is connected to the second input of the frequency comparator and the second input to the selector, the third input of the selector is connected to the output of the multiplication unit, and the output to the first input of the calculator, the second input of which is connected to the sensor the presence of matter O) in the course of civic rolls, and the input of the multiplication unit is connected to the transducer with: I pull the angle of rotation of the first rolls. Do

Description

The invention relates to a measurement technique and can be used / v. In particular in a rolling mill for measuring the length of cold rolled. stripes. A device for measuring the length of a material is known, which contains sensors for the presence of material, converters of the angle of rotation of the work rolls and a computing unit IJ. A disadvantage of the known device is the low accuracy of measurement. The closest to the technical essence and the achieved effect to the invention is a device for measuring the length of the material when it is wound on a drum, containing 1 its fording rolls, kinematically connected with them — the angle transducer rotation of the pulling rolls, the material presence sensor in the pulling valdes, the calculating unit and the associated recording unit 2. . . A disadvantage of the known device is the low accuracy of measurement, due to the slippage, the material relative to the winder bar, the insufficient accuracy of the thickness gauges, and the material tension is not constant. The purpose of the invention is to increase measurement accuracy. The goal is achieved by the fact that the device is equipped with a measuring roller and kinematically. connected to it by the rotation angle converter of the measuring roller, sequentially connected by a multiplication unit, frequency comparator and selector, the output of the rotation angle converter of the measuring roller is connected to the second input of the frequency comparator and the second input of the selector, the third input of the selector is connected to the output of the multiplication unit and the output - to the first input of the calculating unit, the second input of the KoTopioro is connected to the presence sensor, the material in the pulling rolls, and the input of the multiplication unit is connected to the angle converter of the rotary knob in alkov. The drawing shows a block diagram of the device. The device contains a sensor 1 n lichi of material in the course of givivdikh rolls 2, a rotation angle converter 3 of the protivac dich rolls, a computing unit 4, a selector 5, a frequency comparator. 6, smart block 7, measuring roller 8, rotation angle converter 9 of the measuring roller 8 and block 10 registration. The sensor 1 for the presence of material S of pulling rollers is connected to the first input of the computing unit 4, to the second input of which the selector 5 is connected. To the third input of the computing unit 4, the impulse target code is fed. The first input of the selector 5 through the series-connected frequency comparator 6 and the multiplication unit 7 is connected to the output of the transducer 3 of the rotation angle against the main valve. rolls, the second input of the selector 5 is connected to the second input of the comparator b and connected to the output of the converter 9 of the rotation angle of the measuring roller 8, the third input of the selector 5 is connected to the output of the multiplication unit 7, to the second input of which the multiplication coefficient code, the output of the calculation unit 4 is fed connected to the login b.Poka 10 registration. . The price of the pulse of the length of the converter 9 is set through the third input to the computing unit and is determined from the expression, in - the price of the pulses of the converter 9 in units of length, 3, 1.4 ;. diameter of the gray roller 8; number of pulses of the converter 9 per one revolution of the roller 8i. The multiplication factor code of the block 7 is selected taking into account the ratio: V. , VMM- Ы T) J о where Dg and DJ are the diameters of the respective measuring roller 8 and drawing: rolls 2; - the number of pulses of the preformer 9. for one revolution of the measuring roller 8; - the number of pulses of the converter 3 for one revolution of the swath 2, the device operates as follows. In the initial state, when there is no material band in the rolls 2. The converter 3 produces a pulse frequency, which after multiplying in block 7 by the multiplication factor, goes to one of the frequency comparator 6 inputs, to the other input which frequency does not go (roller 8 does not rotate and converter 9 does not generate pulses). At the output of the comparator 6 there is a signal 1, at which the selector 5 passes to the input of the unit 4 pulsed from the output of the multiplication unit 7.

However, block 4 of calculations is not produced, since there is no resolving signal from sensor 1 of the presence of a strip in the pulling rolls 2.

When the strip enters the rolls 2, the sensor 1 generates a resolution signal by which block 4 starts to receive pulses from the output of the selector 5 and calculate the length of the strip taking into account the price value of these pulses given to the third input of block 4. Ta- The CMM is calculated by the current. front end coordinate

When the measuring roller 8 is touched, the band begins to rotate it, provides. Pulse generation by the transducer 9, which acquire:; To the second input of the frequency comparator b. Since in this case the strip stretching is not enough, the linear speed of the measured roller 8 is obviously due to the slippage of the strip will be less than the linear speed of the rolls 2, the frequency comparator 6 will still output the signal

After filling the front end of the strip into the drum of the winder and securing it by winding a few turns of the strip onto the drum, a working tension is created in the strip between the winder and the pulling rolls 2 of the output cell of the mill. At the same time, such contact of the strip with the measuring roller 8 is ensured, at which their slippage relative to each other is practically absent.

From this moment onward, the linear velocities of the pulling rolls 2 and the measuring roller 8 become the same and equal to the linear speed of the strip, i.e. their unit linear displacements also become equal. . .

When the linear velocities are equal, the frequencies of the signals at the input of the comparator b are also equal, a zero signal appears at its outputs, providing switching of channels in the selector 5 and skipping from this moment to the input of the block .4 pulses of the converter 9.

In block 4, the length of the band will be calculated taking into account the pulses from the transducer of the 9th dimensional role of ka 8.

Decreasing the tension of the band to the value at which is. is the strip slip relative to the measuring roller .8, the frequency at the output of the converter 9 will become less than the frequency at the output of the multiplication unit 7, and the comparator 6

5 - will again generate the output signal, at which the selector 5 will pass to the output the pulses of the converter 3 passing through the multiplication unit 7. So work

0 device will continue until the moment of exit, the strip from the zone of sensitivity of the sensor 1.

At the moment when the strip leaves the zone of sensitivity of sensor 1.. (From

The 5 rolls of the output cell of the mill), block 4, will stop receiving pulses from the selector 5 and record the final result of the measurement of the length, which will go to the registration block.

In the described rolling length meter, the error in measuring the length caused by slippage of the relative drum coil and by reducing the tension of the strip in the process below the limit at which the linear velocities of the measuring roller, strip and drum occur, is eliminated.

0

Determining the current coordinate of the front end of the strip improves the accuracy of automating the process of filling the strip. drum winder and produce operational

5 accounting products.

Claims (1)

DEVICE FOR MEASURING THE LENGTH OF MATERIAL WHEN WINDING ON A DRUM, containing pulling rolls, a kinematically associated converter of the angle of rotation of the pulling rolls, a sensor for the presence of material in the pulling rolls, a calculation unit and a recording unit associated with it, characterized in that, p. In order to increase the accuracy of measurement, it is equipped with a measuring roller and kinematically connected to it. A converter of the angle of rotation of the measuring roller, connected in series by the multiplication unit, a frequency comparator and a selector, the output of the converter of the angle of rotation of the measuring roller is connected to the second input of the frequency comparator and the second input of the selector , the third input of the selector is connected to the output of the multiplication unit ·, and the output is connected to the first input of the calculation unit, the second input of which is connected to the sensor of material availability in the pulling roll x, a multiplier input connected to a rotation angle converter ¹ boiling stretch rolls. „., 1013740