SU1244497A1 - Device for checking metal loss in bar mill train - Google Patents

Abstract

The invention relates to the field of weighing technology. The purpose of the invention is to improve the accuracy of control. The device contains a billet mass meter 1 at the mill input, an analog-code converter 2, a billet weight adder 3, a block 4 of information accompaniment of rolls, registers 5, 6, 7 and sensors 8, 9, 10 of the presence of roll, block 11 of the roll pulses, meter 12 , dividers 13 and 19, multiplier 14, gauge 15 of the length of trimming rolls, adder 16 mass trimming rolls, subtractors 17 and 18, and a digital display unit 20. The introduction of new elements and the formation of new connections between the elements of the device allows one to take into account the loss of the metal when the roll is removed from the mill. 1 il. (Oh (L

Description

This invention relates to a weight measuring technique.

The purpose of the invention is to improve the control accuracy by taking into account the loss of the metal when the roll is removed from the mill.

The drawing shows a structural block diagram of the device.

A device for controlling metal losses in the line of the rolling mill contains a meter of 1 mass of billets at the inlet of a steel. Before entering the rolling mill, the preparatory weights are preliminarily weighed with the meter of 1 mass of billets, the signal of which is converted by the analog-code converter 2 and fed to the adder 3 the input of the first register 5, which is part of block 4 of information accompaniment of roll. When the first roll arrives in the visibility zone of the first sensor 8, the last scan, converter 2 analog-code, adder 10, shakes the signal from its output post3 of the mass of blanks at the mill input, block 4 of information accompaniment of rolls containing series-connected n, for example, three, register 5 -7 and the corresponding number of presence sensors disperses into the control input of the first register 5. In this case, the information on the mass of the first workpiece is entered in the register 5. Next, the roll when moving along the production line of the post flushes the zone

kata 8-10, the adder 11 mass rolls of control of the second sensor 9. When the work is done, at the exit of the finishing stand of the mill, measuring the sensor 9, information about the mass of the first

The body 12 is the length of the bar before the shears of hot cutting, the first 13 divider, the multiplier 14, the meter 15 of the trimming length of the blank is entered into the second register 6. With the further advance of the bar, the latter falls into the zone of the third

rolls, the adder 16 mass trimming, the first 17 JQ sensor 10, installed before finishing

and the second 18 subtractors, the second divider 19 by the mill stand group. Sensor 10 is triggered, and information from the output of the second register 6 is entered into the third register 7. Next, from register 7, information about the mass of the first workpiece is fed to the input of the totalizer 2 analog-code to the input of the adder 3 25 torus 11 of the mass of peals at the output of the mass of the workpieces at the mill input and on the mill stand.

Formational input of the first register 5, on the Subsequent billet, received on

the entrance of the mill, when passing by sensors 8-10, automatically resets the information about the mass of the previous billet and enters into the registers 5-7 data about the mass of the current billet. If for any reason (for example, gourmet, breaks prosca and block 20 digital display of metal loss.

The output of the mass meter 1 of the workpieces at the mill input is connected via a conversion input of which the sensor 8 of the presence of a roll on the production line is connected. The output of register 5 is connected to the information input of register 6, to the control input of which the sensor 9 of the presence of a roll is connected. The output of register 6 is connected to the information input of register 7 and to the second input of the first divider 13. To the control input of register 7 is connected

etc.,) the rollout is removed from the process line, then it is not taken into account by the adder 11. For example, the mass information

sensor 10 the presence of roll. The output of the reskat is registered in register 6. The roll in register 7 is connected to the adder 11 and the clearing is removed from the technological one.

and

sy of peals at the exit of the finishing stand of the mill. To the first input of the first divider 13, the output of the gauge 12 of the length of rolls in front of the hot cutting scissors is connected. The output of the first divider 13 is connected to the first input of the multiplier 14, to the second input of which the output of the meter 15 of the length of trimming rolls is connected. The output of the multiplier 14 is connected to the input of the adder 16,

lines, and information about its weight in the register 7 is not recorded, since the subsequent rollout of the information recorded earlier in register 6 is erased and the new information about the mass of the current roll is entered and entered.

Thus, in the adder 11 information is stored only about the mass of suitable rolling products produced by the mill for the output of which is connected to the second input 45 of the analyzed period of time, the first subtractor 17, to the first input to the co-Since the output of the mass accumulator 11 is connected to the first rolling mill line rolls at the exit of the finishing mill stand. The output of the first subtractor 17 is connected to the first input of the second subtractor 18 and the first input of the second divider 19. The second 50 input of the second subtractor 18 and the second input of the second divider 19 connects the output of the adder 3 to the mass of the billets at the mill input.

The output of the second divider 19 is connected to the first input of the display unit 20, to the second input of which the output of the second subtractor 18 is connected.

The device works as follows.

There are several scans at the same time, the number of registers in the information support block and, accordingly, the number of sensors controlling the presence of rolls on the production lines must correspond to the number of rolls in the mill line. In the proposed information support block, three registers are used, since the number of rolls that are simultaneously in the mill line usually does not exceed three. While simultaneously in the line of the camp more than three rolls the number of registers

Before entering the rolling mill, the cookings are preweighted with the aid of the workpiece mass meter 1, the signal of which is converted by the analog-code converter 2 and fed into the adder 3 of the weight of the blanks and to the input of the first register 5, which is part of the block 4 information accompaniment of roll. When the first roll comes in the visibility zone of the first sensor 8, the last one snares at the control input of the first register 5. In this case, the information on the weight of the first workpiece is entered in the register 5. Next, the roll when moving along the mill line enters the zone

 control the second sensor 9. When the sensor 9 is activated, the information about the mass of the first

the entrance of the mill, when passing by sensors 8-10, automatically resets the information about the mass of the previous billet and enters into the registers 5-7 data about the mass of the current billet. If for any reason (e.g., grooms, breaks in rolls, etc.) the roll is removed from the production line, it is not taken into account by the adder 11. For example, the information about the mass

rollback is recorded in the register 6. The rollout as a result of the tapepot is removed from the technological

and

lines, and information about its weight in the register 7 is not recorded, since the subsequent rollout of the information recorded earlier in register 6 is erased and the new information about the mass of the current roll is entered and entered.

Thus, the adder 11 stores information only about the usable mass of

There are several scans at the same time, the number of registers in the information support block and, accordingly, the number of sensors controlling the presence of rolls on the production lines must correspond to the number of rolls in the mill line. In the proposed information support block, three registers are used, since the number of rolls that are simultaneously in the mill line usually does not exceed three. While simultaneously in the line of the camp more than three rolls the number of registers

in the information support unit can be increased by successively increasing them.

Before the rolls are fed into the finishing stand, the front end of the roll is cut, therefore the weight of the roll is usually less than the mass of the blanks by the amount of the cut weight.

When the roll goes to the hot cutting shears installed in the mill line in front of the finishing mill group, its length is measured by a meter 12 of the length of the rolls. The signal from the output of the meter 12 roll length in the form of a code is fed to the first input of the divider 13, to the second input of which comes from the output of the register b is the mass code of the workpiece. If these signals (codes) are present at the input of the first divider 13, it determines the mass of the linear length of the roll by dividing the mass of the workpiece Qs by the length of the roll Lp:

RP / RP: Lp.

Further information in the form of a code, about the actual mass of the linear length of the roll, for example, I p. m, from the output of the first divider 13 is fed to the first input of the multiplier 14. Information about the length of the cut trims goes to the second input of the multiplier 14 from the output of the meter 15. In the multiplier 14, the actual weight of the cut Qo6p is determined by multiplying the length of the cut Oblp by the actual running weight length of the roll pn1:

Qo6p. 1о6р.рп /.

Information about the mass of the trimming stock from the output of the multiplier 14 is fed to the input of the adder 16 of the trimming mass, in which the mass of the trimming of the rolls accumulates. The output of the mass cutter 16 is connected to the second input of the first subtractor 17, to the first input of which the output of the weight accumulator 11 is connected to the rolls at the mill output.

In the adder 11, the mass of only rolls is accumulated. Those peals that for any technological reasons were withdrawn from the mill line (due to brooming, breaking peals, etc.) are not taken into account by adder 11.

Thus, adder 3 takes into account the mass of blanks received at the mill input, adder 11 - the mass of suitable slabs without taking into account the mass of peals withdrawn from the production line, adder 16 - the mass of peeling pieces.

The first subtractor 17 is used to determine the actual mass of good rolled products by subtracting the trimmed mass from the total mass of peals:

Q0r Qpacx.Qo6p.

In the second subtraction section 18, the operation subtracts from the total mass of the blanks arriving at the mill entrance, the total mass of good rolled products and, thus, determines the metal loss in the rolling mill line:

Qn Qs - rfg.

Of great importance for a qualitative assessment of the operation of section rolling mills is the determination of the amount of metal consumed per unit of usable production, the so-called consumable ratio {) of the K: K RZ: Rfg.

For example, K 1.12 indicates that 1.12 tons of metal is consumed per 1 ton of good rolled metal.

The determination of the expenditure ratio of the metal is determined by the second divider 19 by dividing the total weight of the blanks coming from the output of the adder 3 to the second input of the divider 19 by the actual weight of the suitable rolled products, information about which comes from the output of the first subtracting node 17 to the first input of the second divider 19.

The metal loss data in the rolling mill line during rolling and the expenditure coefficient K are monitored by the indications of the digital display unit 20.

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Claims (1)

Invention Formula A device for controlling metal losses in the line of the section rolling mill, containing a billet mass meter at the mill inlet, connected via an analog converter to the mass mass of the billets at the mill inlet, a bar length meter in front of hot cutting scissors, a bar mass adder at the exit from the mill finishing line, The first divider, the first subtractor and the digital display unit for metal losses, characterized in that, in order to increase the control accuracy by taking into account the metal loss when the roll is removed from the mill, a block is inserted into it to the information accompaniment of rolls, made in the form of serially connected registers, the number of which corresponds to the number of rolls that can be simultaneously on the mill and the first of which is connected to the output of the converter; analogue code, the last but one - to one input of the first divider, to the other input of which the meter is connected the length of the roll is in front of the scissors for hot cutting, and the last register is for the input of the adder of the mass of rolls at the exit from the finishing line of the mill, and the same number of sensors Atoms connected to the control inputs of the respective registers, a multiplier, one input of which is connected to the output of the first divider, a cut length meter for the roll, connected to another input of the multiplier, a cut weight accumulator, the input of which is connected to the multiplier output, and the output to the first input of the first the subtractor, to another input of which is connected the output of the mass adder rolls at the output of the number 0 five 1244497 56 the mill line, the second subtractor and the second bodies and the mass adder of the workpieces at the entrance are a swarm divider, the inputs of which are connected to the camp, and the outputs are connected to the inputs of the unit digitally with the outputs of the first subtracter of metal losses