SU759249A1 - Flying shears control apparatus - Google Patents

Description

The invention relates to rolling production, namely to control devices flying shears, producing cutting pro _: kata on the go.

A device management volatile macerator comprising velocities ⁵ STI rolled transducer, a series connection of a reversible counter, the code converter to a voltage regulator function generator and the drive speed as well as reference block cut sensor, displacement sensor ¹⁰ pro- kata and steering angle sensor cutting mechanism connected to the reversing counting, chiku [1].

A disadvantage of such a device is' ⁵ at small lengths of the cut performed by rolling them triangular chart speed is not optimal for the engine to heat, which leads to an overestimation of its power gabari- _m comrade and power losses.

The aim of the invention is to reduce energy consumption by optimizing the law of change in the speed of the electric scissors.

2

This goal is achieved by the fact that the device is equipped with a scissors speed shaping unit, the inputs of which are connected to the rental speed sensor, a reference unit, a rental movement sensor and a cut sensor, and the output is connected to a functional converter.

The scissors speed shaping unit is designed as a comparison unit, two controlled voltage dividers connected to it, subtracting and summing counters and a multiplying unit connected to them and to the second controlled voltage divider.

FIG. 1 shows a functional diagram of the proposed device; in fig. 2, 3, 4 graphics, explaining the principle of its work.

The device contains flying scissors 1 with a sensor 2 cuts and a sensor 3 of the angle of rotation.

With Rolling 4, the Measuring rollers 5 interact with the rental movement sensor b mounted on them and the rental speed sensor 7. The regulator 8 position consists of a series-connected reversible counter 9, the converter 10 code in voltage. live function transducer 11

_ζ to

with a parabolic characteristic, the output of which is connected to the input of the controller 12 of the speed of the electric drive. The outputs of the sensors 3 and 6 are connected respectively to the summing and subtracting inputs of the reversible counter 9. The length of the rolled stock is set by the job block 13, the first output of which is connected to the third input of the reversing counter 9.

The scissor speed generating unit 14 contains a first controlled voltage divider 15, a comparison node 16, a second controlled voltage divider 17, a summing counter 18, a subtracting counter 19 and a multiplying unit 20. The first input of the first controlled voltage divider 15 is connected to the first output of the task unit 13, its the second input, as well as the summing input of the comparison unit 16 are connected to the rental speed sensor 17. Node 16 for comparison vychitayu- ₂₀ present input connected to the output of the first divider 15 managed voltage, as output by * to a second input of the second divider 17 managed voltage. The summing counter 18 and the subtracting counter 19 are connected via the first inputs to the rental movement sensor 6, the Second inputs are connected to the cut sensor 2, to which the fourth input of the reversing counter 9 is also connected, the third input of the counting counter 19 is connected to the second output of the task unit 13. The multiplier unit 20 'is connected to the outputs of the counters 17 and 18 via the first and second inputs, and to the first input of the second controlled voltage divider 17, the output of which is also the output of the shaping unit 14 - scissors speed - connected to the second input of the functional converter 11 .

The device works as follows.

At the end of the previous cut by the signal from the cut sensor 2, the summing counter 18 is reset to zero, and the length of the cut-off rolled 1-n is recorded in the subtractive counter 19 After the rolling has gone.

1, the counters 18 and 19 record the numbers I and 1 - _{n -} I, respectively. After multiplication. numbers I and 1-n-1. in the copying unit 20, from its output to the first input of the second controlled voltage divider 17, the number 1 (1_ _η —1) is received. If at its second input there is a signal V, then from its output to the second input of the functional converter. 11 Signal is received Δν = υ-Ι · [ί _η -Π (1),

changing by parabolic law in

ten

15

25

thirty

35

45

759249 4

growth V as a function of the current time value. In this case, the specified travel time

7 kz?

<ν _η

where ν _η is the rolling speed.

The current time value is proportional to

the value of I, the specified displacement corresponds to the value of the initial misalignment (the difference ΔΙ_ _η between the path traveled by rolling from the cut to the cut and the circumference of the turn, the cutting body cutting), and the moving speed corresponds to a decrease in Δν of the flying scissors speed relative to the rolling speed. However:

TC to _P

Δΐ _η - (2)

• a ^claim for

With an appropriate choice of the coefficient V in equation (1) by jointly solving equations (1) and (2), the signal Δν, supplied as a task to reduce the speed of flying scissors relative to the rolling speed, will provide an optimal scissors speed pattern for the engine heating.

Substituting in (2) the value of Δν from equation (1) we obtain:

6Y-,

V,

(3)

‘Π

In the transition to relative units:

ίπρ V ^th - ^{6th !! p}

where de _p = d | _ _p / xPr is the relative initial length mismatch;

] 3p is the diameter of the circle of rotation of the cutting organ.

FIG. 2 is a graph of dependencies (4). At Δ1 _η > 0.6, the dependence (4) is approximated with sufficient accuracy by the dependence

νιυ

(five)

The magnitude of the error that occurs is illustrated by the graph in FIG. 3

At the first input of the first controlled voltage divider 15, the number Δ1_ _η comes from the first output of block 13 of the task, to the second input of it from the rolling speed sensor 7, a voltage is received corresponding to the speed 50 of rolling ν _η . The resulting voltage at its output ΔΙ _η ν _{η is} fed to the subtractive input of the comparison unit 16, to the summing input of which voltage is applied and _p . After scale transformations and algebraic

functions of the current length of hire 1. For electro-^ _{summation of the INPUT 1X} voltages, a node of 16 drives providing displacement of the comparator produces a voltage: sling mechanism for a given time * 4

and the magnitude of the displacement, optimal for sodium-V _χ

count of the engine is a graph of sko- ^(if p1

759249

which from its output goes to the second input of the second controlled voltage divider 17. The output voltage Δυ of the second controlled voltage divider 17 is proportional to the number Ι ( _η -1) that came to its first input, and to the signal V * that came to the second input, goes to the second input of the functional converter 11 and is the signal that sets the amount of its output voltage limitation .

At the time of the cut, the cut signal of the sensor 2, which arrives at the fourth input of the reversible counter 9, records the initial mismatch Δί _{η in it} and subsequently the counter controls the mismatch, i.e. magnitude.

ΔΙ_ητ ⁼ Δί _η - I + 1p

where 1p is the path of the cutting organ from the moment of the previous cut.

Output voltage regulator 8 ^positive: zheniya consisting of down counter ₂ 0 9 code converter 10 to a voltage converter and functional · 11 enters the input of the speed controller 12 and electric flying shears used to reduce the task of scissors speed relative to the speed of rolled _{February 5} ' Due to the use of the signal Δν from the output of the scissors speed shaping unit 14 to limit the output voltage level of the functional converter 11, the _{E0 is} compared to the signal Δυ _ρ . _η formed by the position controller 8 with the signal Δν, While ΔΙ) <Δυ _βη . the output voltage of the functional Converter 11 is equal to Δν. When Δυ> Δϋρ _{η <the} output voltage of the converter 11 is equal to Δυ _{ρ η} \

FIG. 4 solid lines show graphs of the signal change Δ сигнала from the output of the scissors speed generating unit 14 and the signal Δυ _ρ η for the case of operation of all the device nodes without errors. In case of errors in the operation of the device, the graphics take the form shown in FIG. 4 by the dashed line.

Up to the point in time (see Fig. 4), the output voltage of the functional converter 11 is limited at the level determined by the size of the signal Δν supplied to its second input and the change in the speed ν _{ρ of the} flying scissors is set by the signal Δν. At the moment of time ίι is the signal Dur. l becomes less than the signal Δν, the functional converter 11 exits the limiting mode and the speed of the flying scissors is further determined by the signal Δν _ρ n ₅ In this case, the ree rolling is performed at the desired point.

In the subsequent cutting cycles, the operation of the device is similar.

The use of a flying scissors control device, which provides a parabolic diagram of the speed of movement of the cutting organ, makes it possible to reduce by 11% the power of the engine compared to the power required for the implementation of the triangular diagram of the velocity change.

Claims (2)

Claim 1. A flying scissors control device containing a rolling speed sensor, a sequential reversing counter, a code-to-voltage converter, a functional converter and an electric drive speed controller, as well as a task unit, a cutting sensor, a rolling movement sensor, and a scissors angle sensor connected to the reversible Counter This is due to the fact that, in order to reduce energy consumption by optimizing the law of change in the speed of an electric scissors drive, it is equipped with a speed forming unit and scissors, the inputs of which are connected to the rental speed sensor, task block, rental movement sensor and cut sensor, and the output is connected to the functional converter. 2. The device according to claim (distinguished by the fact that the scissors speed forming unit is designed as a reference unit, two controlled voltage dividers; connected to it, subtracting and summing counters and a multiplying unit connected to them with the second controlled voltage divider.