SU1696826A1 - Method of controlling charging, discharging and moving blanks in ring furnace - Google Patents

Abstract

The invention relates to controlling the movement mechanisms of blanks in heating furnaces. The purpose of the invention is to reduce the cycle time loading - moving - unloading and uniform layout of the workpiece along the radius of the furnace. After measuring the width of the workpiece, the path of the loading mechanism on the receiving roller Dp is calculated, and the workpiece is captured exactly in the middle of the workpiece. Moreover, depending on the width of the loaded workpiece, the calculation of the path of movement of the loading mechanism in the DI furnace and the layout of the workpieces on the radius are carried out. Then, the hearth movement operation is carried out, which stops at the moment the blanks arrive at the unloading position. The unloading of the blanks from the furnace is carried out in the reverse order of loading, according to the calculated values of the paths Dp and Di for the unloading mechanism at the moment of finding the specified unloading radius on the loading axis 2 or 2 tabl. yo

Description

The invention relates to the control of mechanisms for moving the blanks in heating furnaces and can be used to control the loading, unloading and movement of blanks in a circular heating furnace and in other technological processes,

The aim of the invention is to reduce the cycle time loading - moving - unloading and uniform layout of the workpiece along the radius of the furnace.

Fig. 1 shows a diagram of an apparatus for implementing a method for controlling the loading, unloading and moving of blanks in an annular furnace; figure 2 - the layout of the blanks in the annular seal along the radius, top view.

The device for implementing the method comprises a workpiece width meter 1, sensors 2 and 3, respectively, of the loading mechanism path on the receiving roller table and in the furnace, setpoint set 4, sensors 5-7, respectively, of the discharge mechanism path in the furnace and on the unloading roller table and the presence of blanks at the discharge radius, block 8 of determining the path of the loading mechanism on the receiving roller, block 9 of determining the path of the loading mechanism in the furnace, block 10 controlling the loading mechanism, block 11 moving the hearth, block 12 controlling the unloading mechanism and block 13 matching.

The workpiece width meter 1 is designed to measure the width L3 of the workpieces to be loaded, to form

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on its first output of the L3 signal in a binary normal code. At the second output of the width meter 1, a logical signal is formed, fixing the measurement moment. Sensor 2 of the loading mechanism path on the receiving roller table is designed to determine the position of the loading mechanism on the receiving roller table and provides at its output a Dp signal in a binary normal code, the magnitude of which is proportional to the path passed by the loading mechanism.

The sensor 3 of the furnace loading mechanism path is designed to determine the position of the loading mechanism in the furnace and provides at its output a DI signal in a binary normal code, the value of which is proportional to the path taken by the loading mechanism.

Unit 4 setters at their outputs 1-4 signals a0, m, Lp and, max, corresponding to the distance from the loading window to the rear position of the loading mechanism, the maximum number of blanks to be loaded on the layout radius, the working width of the bottom and the maximum width of the blanks for p-r dnogo posad in binary normal code. Unit 4 setters can be executed on the basis of a block of registers (memory cells).

The sensor 5 of the path of the unloading mechanism in the furnace is designed to determine the position of the unloading mechanism in the furnace and provides at its output a DI signal in a binary normal code, the value of which is proportional to the path traveled by the unloading mechanism.

Sensor 6 of the unloading mechanism path on the unloading roller table is designed to determine the position of the unloading mechanism on the unloading roller table and provides at its output a Dp signal in the binary normal code, the value of which is proportional to the path taken by the unloading mechanism.

The sensor 7 for the presence of blanks at the discharge radius of the furnace provides at its output a signal during periods of the presence of blanks at the discharge radius of the furnace. Block 8 determines the path of the loading mechanism on the receiving roller table to calculate the path of the loading mechanism on the receiving roller table in accordance with the mathematical expression:

n -a u

Up - Eo 2

(D

where Dp is the path of the loading mechanism on the receiving roller table;

ao is the distance from the loading window to the rear position of the loading mechanism;

U - the width of the workpiece to be loaded,

The first and second inputs of block 8 receive signals U and a0, corresponding to the width of the loaded workpiece and the distance from the loading window to the rear position of the loading mechanism. At output, block 8 generates a Dp signal corresponding to the loading mechanism path on the receiving roller table.

The block 8 of determining the path of the loading mechanism on the receiving roller table may be

5 is made, for example, on the basis of an adder, a divider and a memory register.

The signal corresponding to the first input of block 8 is fed to the input of the divider, from the output of the divider the code corresponding to

0 D / 2, is fed to the input of the adder, which is connected to the second input to the second input of block 8, where the code corresponding to ao goes. From the output of the adder, the code corresponding to Dp is stored in the memory register,

5 which, by its output, is associated with the output of block 8.

The block 9 for determining the path of the loading mechanism in the furnace is designed to calculate the path of movement of the loading mechanism into

0 furnace in accordance with the mathematical expression:

n, i A n + (n - 1), DI Lp - n –A. Ln

Max

. (2)

"LD - m max

where a is n + distance between

billets located on the bottom bars for the n-th bottom and n, max on this radius;

DI - the path of the loading mechanism in the furnace working area;

Lp is the working width of the furnace hearth;

Lp.max - the maximum width of the workpieces for the n-p of the bottom;

n - the number of blanks immersed on the layout radius;

m - the maximum number of blanks to be loaded on the layout radius;

1 1.2p.

The first, second, third and fourth inputs of block 9 receive signals m, Lp, max and n, respectively. The fifth input receives the enable signal of block 9. At output, block 9 generates a signal corresponding to the path of the loading mechanism in the furnace.

The block 9 for determining the path of the loading mechanism in the furnace can be performed on the basis of four key blocks, five adders,

two dividers, three factors, and a memory register.

Signals corresponding to the maximum number of blanks to be loaded on the layout radius (t), the working width of the furnace hearth (), the maximum width of the blanks for the n-p dungeon (max) and the number of blanks loaded on the layout radius (p) From the first, second, third and fourth input of block 9, respectively, the first inputs of four key blocks, the second inputs of which receive a block enablement signal from input 5 of block 9, arrive at the inputs of the first key block, the code corresponding to t, goes to the input ne Vågå multiplier. In the first adder, the unit is summed to the value of this code. From the output of the first adder, the code corresponding to (t + 1) is fed to the first input of the first divider. From the output of the third key block, the code corresponding to, max goes to the second and first inputs of the first and second multipliers, respectively. From the output of the multiplier, the code corresponding to m and max is fed to the first input of the second adder, the second input of which receives the code from the output of the second key block, which, in turn, is connected to the first input of the third adder. From the output of the second adder code corresponding to (Lp -t-1-n, max). arrives at the second input of the first divider. Since the release of the first divider code corresponding to

d Lp m Ln.MaKc

m m +1

comes to the first input of the third multiplier. From the output of the fourth key block, the code corresponding to n is fed to the second input of the third multiplier and to the inputs of the fourth and fifth adder. From the output of the third multiplier, the code corresponding to pA arrives at the second input of the third adder. In the fourth adder, the unit is subtracted from the value of n, and from its output the code corresponding to (p-1) is fed to the second input of the fifth adder. From the output of the fifth adder, the code corresponding to n + (p-1) is fed to the input of the second divider, where this quantity is divided into two, and from the output of the latter, the code corresponding to

n + (n-1)

. enters the second

input of the second multiplier. Since the release of the second multiplier code corresponding to

n + (n - 1) x Ln, MaKc, goes to the third

input of the third adder. From the output of the third adder, the code corresponding to DI is fed to the input of the memory register, the output of which is connected to the output of block 9, i.e. at the output of block 9, a code corresponding to the DI is generated.

The loading mechanism control unit is designed to control the movement of the loading mechanism.

At the 1-7th entrance of the block 10, signals are received, respectively, the presence of the workpiece

0 loading position in the furnace, calculated and actual Dp value, calculated and actual D, block resolution and signal about the maximum number of blanks to be loaded on

5 radius of the layout. At the 1-4th outputs, the block 10 generates respectively the signals of the number of blanks loaded into the furnace, the resolution of the functioning of block 9, the end of the operation of loading the blanks to

0 radius of the layout and code. corresponding to the number of workpieces loaded on the layout radius and for each workpiece codes corresponding to Dp and DI.

The loading mechanism control unit can be performed, for example, on the basis of the drive of the loading mechanism, the rear position sensor of the loading mechanism, the workpiece pickup sensor, seven key blocks, three comparators, four AND elements,

0 seven memory elements, an OR element, a delay element, a counter, a decoder, a load register and two prohibition elements.

The signal fixing the presence of the workpiece at the loading position in the PE comes from the first input of the block 10 to the first input of the first element I, which is connected to the sixth input of the block 10, output

0 of the sensor of the rear position of the loading mechanism and with the first grip output of the workpieces, which detects that the workpiece of the loading mechanism is not captured. From the output of the first element and the signal comes

5 to the first memory element, which is triggered through the first input of the OR element and the first prohibition element, includes the drive of the loading mechanism moved on the receiving roller table to capture the blanks.

0 Simultaneously, from the output of the first memory element, the signal goes to the first inputs of the first and second key blocks, the second inputs of which receive the calculated and actual Dp value codes from the second and third input of the block 10, respectively. From the output of the first and second key blocks, the codes go to inputs of the first comparator. At the moment of equality of the calculated and actual value of Dp, the first comparator is activated, and the signal from its output goes to the second memory element and the first memory element, which, in turn, de-energizes the drive of the loading mechanism through the OR element and the first prohibition element. . The loading mechanism is stopped and the gripping of the blanks on the receiving roller table is carried out. After the blanks are captured, the blanks capture sensor is triggered, and the signal from its second output goes to the first input of the second element I, the second input of which receives a signal from the output of the second memory element. From the output of the second element AND, the signal goes to the operation of the third memory element, which, when activated, resets the second memory element and through the second input of the OR element and the first prohibition element turns on the drive of the loading mechanism. The loading mechanism with the captured workpiece is moved towards the furnace.

At the same time, from the output of the second element, the signal is fed to the input of the counter, in which the unit is recorded. From the output of the counter, the code corresponding to one is fed to the first input of the third comparator, to the first output of block 10, and to the input of the decoder. From the output of the decoder, the signal goes to the first inputs of the first key of the fifth and sixth key blocks.

At the same time, from the output of the third memory element, the signal goes to the first inputs of the third and fourth key blocks and to the second input of the first key of the fifth key block, the third input of which receives the code corresponding to the calculated Dp value for the first workpiece loaded into the furnace. From the output of the first key of the fifth key block, the code corresponding to Dp is supplied for writing to the first register of the load register. The second inputs of the third and fourth blocks of keys receive, respectively, the codes of the calculated and actual DI values from the fourth and fifth inputs of block 10. From the output of the third and fourth blocks of keys, the codes corresponding to the calculated and actual DI values go to the outputs of the second comparator. At the moment of equality of the calculated and actual value of the DI value, the second comparator is activated, and the signal from its output goes to the fourth memory element, the output of which is connected to the second input of the first key of the sixth key block, the first input of the third And element, and the third memory element is reset. The third memory element with its output through the OR element and the first prohibition element de-energizes the drive of the loading mechanism. The loading mechanism with the workpiece is stopped in the furnace, and the workpiece is laid on the pickup radius.

The third input of the first key of the sixth key block receives the code corresponding to the calculated DI value for the first workpiece loaded into the furnace. From the output of the first key of the sixth key block, the code corresponding to the DI is supplied for writing to the first register of the load register,

After laying the workpiece at the pickup radius, the first output of the pickup sensor is triggered, and the signal is fed to the second input of the third element I, the output of which is connected to the output of the fifth memory element, which, by resetting, resets the fourth memory element and through the second prohibition element turns on the drive loading mechanism. The loading mechanism moves to its original state.

At the same time, from the output of the fifth memory element, the signal goes to the operation of the sixth memory element, the output of which is connected to the second output of the unit 10.

If, when the loading mechanism is moved to the initial state, the rear position sensor of the loading mechanism is triggered, the signal from the latter is sent to reset the fifth memory element, which by means of the second prohibition element de-energizes the load mechanism drive. The loading mechanism stops at the starting position.

Similarly to the above, the second, etc., is loaded.

If the radius of the layout loaded

all n blanks, i.e. the code at the output of the counter corresponds to n, and the signal arrives at the first input of the third comparator, the second input of which receives the code corresponding to m from the seventh input of block 10, the third comparator is triggered, and the signal of this output goes to the operation of the seventh memory element, the output of which connected to the first input of the fourth element I.

The second input of which receives a signal from the output of the rear position sensor of the unloading mechanism. From the output of the fourth element, And the signal goes to the inputs of the prohibition of the first and second elements of the prohibition and

the third output of block 10.

Simultaneously, from the output of the fourth element, the signal arrives at the first input of the seventh key block, the second input of which receives a code corresponding to the number of blanks loaded on the pickup radius. From the output of the seventh block of keys, the code corresponding to n is fed to the n-th register of the load register. From the output of the load register codes corresponding to

and for each workpiece Dp and DI, go to the fourth output of the block 10.

Also, from the output of the fourth element, And the signal through the delay element enters to reset the contents of the number of blanks. The hearth moving unit 11 is designed to move the hearth by one step, provided that the loading and unloading of the blanks is not carried out /

The first input of block 11 receives a signal corresponding to the number of blanks loaded at the pickup radius and for each blank codes corresponding to DI and Dp. The second input of the block 11 receives the enable signal of the block. At the first output, block 11 generates codes corresponding to the parameters of the workpieces located at the discharge radius, i.e. the number of workpieces located at the discharge radius, and for each workpiece, starting with the nth, the signals corresponding to DI and Dp. At the second output, a signal is generated that the hearth movement unit 11 is completed.

The hearth moving unit 11 can be performed, for example, on the basis of a moving mechanism drive, a trigger, a pulse generator, a shift register unit, a counter, a decoder, a memory register, a block of delay elements, an AND element, a delay element, and two memory elements.

From the second input of block 11, the block enable signal is sent to trigger the trigger. From the output of the trigger, the signal goes to the reset of the first memory element and to the first input of the element I, the second input of which receives a signal from the output of the pulse generator. From the output of the element, And the signals with a certain frequency arrive at the input of the counter, which by its output is connected with the input of the decoder. From the first output of the decoder, the signal arrives at the first element of the block of delay elements and at the input of the register of the memory register. Information corresponding to the number of blanks to be unloaded from the unloading radius and codes corresponding to DI and Dp are rewritten into the memory register from the n-th register of the shift register block. From the output of the first element of the block of delay elements, the signal is fed to the input of the record of the n-th register of the register of the shift registers. The information is copied from the (n-1) th register of the shift register block into the n-th. When the second output of the decoder is triggered, the signal from it is sent to the reset of the (n-1) th register of the shift register block and through the second element of the block of delay elements to the entry of the (n-1) th register of the shift register block, and the information is rewritten from

(p-2) gr register in (p-1) th. Thus, information is copied from (n-1) -th register to n-th, from (p-2) -th register to (n-1), etc. from the second register to the third, from the first register to the second, and to the first register the information is received from the first input of block 11,

After the census of information from previous registers and subsequent c (n + 1) -th

0 output of the decoder receives a signal to trigger the second memory element. From the output of the second memory element, the signal goes to resetting the trigger, resetting the counter, and driving the hearth, and under

5, the furnace moves one step.

At the same time, from the output of the second memory element, the signal goes to the delay element, the output of which is connected to the input of the first memory element. When the first memory element is activated, the signal from it goes to reset the second memory element to the second output of block 11, which records the end of operation of the hearth moving unit 11.

5 The discharge mechanism control unit 12 is designed to control the movement of the discharge mechanism. The first input of block 12 receives signals corresponding to the number of workpieces located at the discharge radius, and for each workpiece codes corresponding to DI and Dp. The second input of block 12 receives a signal to allow the block to work. The third and fourth input of block 12 receives codes corresponding to the actual values of DI and Dp, and the fifth input receives a signal corresponding to the presence of blanks at the furnace discharge radius. At the output of block 12, an end signal is generated

0 operations unloading blanks in the discharge radius.

The unit 12 controls the unloading mechanism can be performed, for example, on the basis of the drive of the unloading mechanism, register

5 unloading, two AND elements, a trigger, two key blocks, a delay element, four memory elements, a reversible counter, a decoder, a rear position sensor of the unloading mechanism, a pickup locking sensor, an unloading end sensor, an OR block, three comparators, element OR and two elements of the ban.

Signals corresponding to the working permit of the unit and the presence of blanks at the furnace discharge radius come from the second and fifth inputs of block 12 to the first and second inputs of the first element I, from the output of which the signal goes to trigger. From the trigger output, the signal goes to

the first inputs of the register of the unloading register and the first key block, the second inputs of which receive, respectively, the DI and Dp codes for each workpiece located on the unloading radius and the number of blanks per unloading radius from the first input of the block 12. From the output of the first key block, the code corresponding to the number of blanks at the discharge radius is fed to the input of the reversible counter.

At the same time, from the trigger output, the signal through the delay element enters the first input of the first memory element. From the output of the first memory element, the signal is sent to reset the trigger. From the output of the reversible counter, the code corresponding to the number of blanks at the discharge radius is fed to the input of the decoder. From the output of the decoder, the signal arrives at the first input of the n-th key of the second key block, the second input of which receives the code corresponding to DI and Dp from the n-th register of the register, unloading. From the output of the nth key of the second key block, the codes corresponding to DI and Dp, through the block of elements OR, arrive respectively at the first inputs of the first and second comparators. Codes corresponding to the actual value of DI from the third input of block 12 are connected to the second input of the first processor.

At the initial moment, the unloading mechanism is in the initial position and the sensor fixing this position is triggered, and from its output the signal goes to the second input of the second element I, the first input of which receives the signal that the unit operates from the second input of the block 12. From the output of the second element And the signal goes to the second memory element, which, when it is triggered, activates the drive of the unloading mechanism through the first projection element. The unloading mechanism is moved to the furnace to capture the blanks. When the codes corresponding to the calculated and the actual DI value received at the first comparator match, the comparator will trigger and reset the second memory element, and de-energize the drive of the unloading mechanism through the first prohibition element. The unloading mechanism stops to pick up the nth blank at the discharge radius. The sensor activates the capture of blanks in the furnace, and the signal from its output goes to the third memory element, which, triggered, activates the unloading mechanism through the first input of the OR element and the second prohibition element. The unloading mechanism with the captured workpiece is moved to the side of the unloading roller table.,

Codes corresponding to the actual Dp value from the fourth input of block 12 are connected to the second input of the second comparator. When the codes corresponding to the calculated and actual Dp values received by the second comparator match, the comparator will trigger and reset the third memory element, and through the OR element and the second element of the ban de-energize the drive

0 unloading mechanism. The unloading mechanism stops on the unloading roller table, and the workpiece is laid on the unloading roller table: ki. In this case, the sensor of the end of the discharge is triggered, and the signal from its output comes

5 to the fourth memory element, which is triggered, activates the unloading mechanism drive through the second input of the OR element and the second prohibition element. The unloading mechanism returns to its original position, and the rear sensor of the unloading mechanism retracts. From the output of the rear position sensor, the signal goes to the reset of the fourth memory element and to the second input of the second element I.

5 Simultaneously, from the output of the second comparator, the signal goes to the subtracting input of the reversible counter, i.e. in the counter, the number of blanks on the discharge radius is reduced by one, and in

0 it will be recorded the number of blanks corresponding to the value (n-1).

Similarly to the above, unloading is performed (n-1) th, etc. first workpiece. If the unloading radius is unloaded

5 all blanks, i.e. in the reversible counter, the number of blanks is zero, the third comparator is triggered (in the comparator, the code from the output of the reversible counter is compared to zero), and the signal from its output is sent to reset the first memory element, the prohibition inputs of the first and second prohibition elements and the output block 12.

The matching unit 13 is designed to coordinate the operation of the control unit 10.

5 loading mechanisms, hearth moving unit 11, and unloading mechanism controlling unit 12. The first, second, and third inputs of the block 13 receive, respectively, the signals for the end of the workpiece loading operation.

0 on the radius of the layout, the end of the operation of unloading blanks in the radius of the discharge and the end of the operation of moving the hearth. On the first, second, and third outputs, block 13 generates, respectively, signals for enabling the operation of blocks 10-11.

The matching unit 13 can be performed, for example, on the basis of three AND elements, two NOT elements, a trigger, three prohibition elements, four memory elements and three prohibition elements. From the first and second inputs of block 13, the signals respectively arrive at the inputs of the first element I and at the inputs of the first and second elements NOT. From the output of the first element AND, the signal through the first prohibition element goes to the removal of the first memory element, the output of which through the second prohibition element is connected to the first input of the second element I, the first input of which receives a signal from the third input of the block 13.

At the completion of the hearth movement operation, a signal is present at the third input of block 13 all the time until the next command for the next hearth movement.

Simultaneously, from the third input of the block 13, the signal arrives at the third prohibition element and at the first delay element. At the output of the third prohibition element, the signal will be held until the first delay element is triggered. When the output of the first delay element is on a signal that is associated with the prohibition input of the third prohibition element, the output of the third prohibition element is de-energized. From the output of the second element, And the signal goes to the operation of the second memory element and to the input of the second delay element. From the output of the second delay element, the signal arrives at the third output of block 13. In this case, the enable signal of the hearth movement unit 11 is generated, and the signal is disconnected from the third input of block 13. From the output of the second memory element, the signal is fed to the first input of the third element And to the input of the prohibition of the second element of the prohibition. In this case, the output of the second prohibition element is de-energized, and the outputs of the second element AND, the second delay element and the third output of block 13 are also de-energized.

When the pitch movement operation is completed, then at the third input of block 13 a signal is transmitted which is fed to the input of the third prohibition element and the first delay element. From the output of the third prohibition element, the signal goes to the second input of the third element I, the output of which is connected to the inputs of the trigger, the third and fourth memory elements. From the outputs of the third and fourth memory elements, respectively, the signals go to the first and second inputs of block 13. In this case, the enable signals of blocks 10 and 12 are generated. From the trigger output, the signal goes to the prohibition input of the first prohibition element and through the third delay element to reset the first element memory

If at any (first or second) input of block 13 the signal is de-energized, the first or second element will NOT work, and the signal will go to reset the third or even-.

memory element, i.e. in this case, the loading or unloading of the blanks from the furnace is completed. At the same time, the signal from the output of any element is NOT through the OR element to the flush trigger and the second memory element.

When on the first and second input of the unit 13, the signal turns on, i.e. loading and unloading of blanks completed, then the operation of block 13 is similar to the above.

The static state of the device is characterized by the fact that the first output of the gauge 1 of the workpiece width is connected to the first input of the loading mechanism definition block 8 on the receiving roller table, the second input of which is connected to the first output of the setting unit 4, the second, third and fourth outputs of which are connected respectively to the first , the second and third inputs of the block 9 determining the path of the loading mechanism in the furnace, the output of which is connected to the fourth input of the block 10 controlling the loading mechanism, the first, second, third, fifth, sixth and seventh The first inputs of which are connected respectively to the second output of the workpiece width meter 1, the output of the loading mechanism path determination unit 8 at the receiving roller table, the outputs of sensors 2 and 3 of the loading mechanism path at the receiving roller table and in the furnace, the first output of the matching unit 13 and the second output of the control unit 4 The first, second, third and fourth outputs of the loading mechanism control unit 10 are connected respectively to the fourth and fifth inputs of the loading mechanism path determination unit 9 in the furnace, with the first input of the matching unit 13 and to The first input of the hearth movement unit 11, the second input and output of which are connected respectively to the third output and input of the matching unit 13, the second input and output of which are connected respectively to the output and the second input of the discharge control unit 12, the first, third, fourth and fifth inputs connected respectively with the first output of the hearth movement unit 11, the outputs of the sensors 5 and 6 of the unloading mechanism path in the furnace and on the unloading roller table and the sensor 7 for the presence of blanks at the unloading radius.

The method of controlling the loading, unloading and moving of the blanks in an annular furnace is implemented as follows.

Before loading the blanks into the furnace, information corresponding to a0, hp, Lp, and Ln.MaKc is entered into the 4 setters block.

The operation of the device begins with a measurement of the width of the first workpiece to be loaded. After measuring the width of the workpiece, the signal corresponding to C is fed from the first output of the width meter 1 to the first input of the block 8 for determining the path of the loading mechanism i on the receiving roller table. From the first output 13 of the matching, the enable signal of the operation of the block is received at the sixth input of the block 10. The second input of the block 8 receives the code corresponding to a0, from the first output of the block 4 setting points. In block 8, the calculation of the Dp path of the loading mechanism on the receiving roller table is performed in accordance with the mathematical expression (1). From the output of block 8, the code corresponding to i the calculated value Dp is fed to the second input of block 10 controlling the unloading mechanism. After measuring the width of the workpiece, the signal from the second output of width meter 1 (logical output) is fed to the first input of block 10, Block 10 turns on the loading mechanism which is moved on the receiving roller table to capture the blanks. The third input of block 10 receives the code corresponding to the actually traversed path of the loading mechanism from the output of sensor 2 of the loading mechanism path on the receiving roller table. When the calculated and actual values of Dp are equal, block 10 stops the loading mechanism and the workpiece is captured by the loading mechanism on the receiving roller table. Then, the loading mechanism with the workpiece is moved to the furnace to lay out the workpiece at the radius of the furnace.

For laying the blanks evenly along the radius of the furnace with a uniform space between the blanks, the path of advancement of the loading mechanism is calculated from the moment the billet is seized on the receiving roller table until it is laid on the pickup radius and determined by the mathematical expression (2).

An example of a uniform layout of the blanks on the hearth of the annular furnace of the mill 1500.

The ring furnace of the mill 1500 has the following characteristics: the diameter of the furnace is 14,300 mm; working width of the bottom - 2120 mm; rotation angle of the bottom - 18 °; the angle between the loading and unloading axes is 36 °.

The ring furnace is divided into 20 sections. If the load is on the first section, then the unloading is on the nineteenth, and the twentieth section is free and lies between the axes of the loading and unloading mechanisms.

In tab. 1 shows the geometrical dimensions of the heated metal and the number of blanks in the row of the bottom.

As can be seen from Table 1, the number of blanks in the range of the layout radius varies between 1-5 and, accordingly, for each row and max are: i.max 1900 mm;

12, max 1000 MM; , Mm: Y.max 470 mm; max. 240 mm.

The distance from the loading window to the rear position of the loading mechanism is a0 3160 mm.

0

According to mathematical expressions 1 and 2, a calculation was made for the way to advance the loading mechanism from the initial position to the seizure of the workpiece on the receiving part 5 of the gange and further laying it on the pickup radius. The calculation results are shown in table 2.

If there are 5 blanks with a maximum width in the row of the tangle radius

0 240 mm, the workpieces are stacked evenly with a gap between the workpieces equal to 153.3 mm with the corresponding coordinates of the loading mechanism DI.

Calculation DJ is made in block 9, on

5 the first, second and third inputs of which are received codes m, Lp and, max the second, third and fourth outputs of the block 4 setters. The fourth and fifth inputs of block 9 receive signals corresponding to the number of blanks loaded at the pickup radius, and the enable signal of block 9. From the output of block 9, the code corresponding to the DI value calculated for the loaded blank according to the mathematical expression (2), arrives at the fourth input of block 10. At the fifth input of the block MIO, the code corresponds to the actually traveled path of the loading mechanism from the output of sensor 3

0 path loading mechanism in the furnace. At the moment of equality of the calculated and actual values of the DI value, the block 10 generates a signal to stop the loading mechanism, and the workpiece is laid on the laying radius.

When a new billet appears on the receiving roller of the kiln for loading on the same radius of the layout, the sequence of operation of the blocks involved

0 for download, similar to the above.

When all the blanks on the layout radius are loaded, i.e. code corresponding to the number of blanks to be

5 loading on the radius of the layout, coming from the second output of the block 4 setters to the seventh input of the block 10 and the code corresponding to the number of workpieces loaded on the radius of the layout, match, then the block 10 at its third output generates a signal

termination of the operation of loading workpieces on the layout radius.

From the third output of block 10, the signal about the end of the loading operation goes to the first input of block 13 of matching.

If the sensor 7 for the presence of blanks at the discharge radius is triggered, the signal goes to the fifth input of the unloading mechanism control unit 12. The second input of block 12 receives the enable signal of the block from the second output of block 13. The first input of block 12 receives signals corresponding to the number of workpieces located at the discharge radius, and for each workpiece codes corresponding to the calculated value of DI and Dp. Block 12 includes an unloading mechanism that moves into the furnace to capture the nth blank at the unloading radius. In this case, the third input of block 10 receives codes corresponding to the actual value of DI from the output of sensor 5 of the path of the unloading mechanism in the furnace. At the moment of equality of the calculated and actual values of the DI value, block 12 generates a signal to stop the unloading mechanism to capture the n-th workpiece at the discharge radius. After that, the unloading mechanism with the captured workpiece is moved in the direction of the unloading roller table. In this case, the fourth input of block 12 receives codes corresponding to the actual value of Dp from the output of sensor 6 of the path of the unloading mechanism on the unloading roller table. At the moment of equality of the calculated and actual values of Dp, block 12 generates a signal to stop the unloading mechanism, the unloading mechanism stops on the unloading roller table, and the workpiece is laid on the unloading roller table.

Similarly to the above, unloading of all billets that are on the unloading radius is made. When all blanks have been unloaded from the unloading radius, block 12 at its output generates a signal to end the unloading operation of blanks from the unloading radius, which is fed to the second input of matching unit 13.

If the loading and unloading of the blanks from the furnace is completed and a signal appears at the first and second inputs of the matching unit 13, then the first and second outputs of the block 13 are de-energized, and a signal is generated at the third output that goes to the second input of the hearth moving unit 11 . Unit 11 generates a signal for moving the hearth of the ring furnace one step. Information for blanks arriving at the discharge radius is output to the first output of block 11, and in block 11 the information is shifted by one register in the direction corresponding to the hearth movement. Then, the information corresponding to the number of blanks loaded at the loading radius is copied, and for each blank, the codes corresponding to DI and Dp from the fourth output of block 10 through the first input of block 11 enter the shift registers.

After completion of all operations, block 11 at its second output generates a signal about the completion of the block, which is fed to the third input of block 13 of matching. The unit 13 at the first and second outputs generates the operation enable signals of the units 10 and 12, and the operation of the device is repeated to load, unload the blanks and move the furnace hearth.

Using the method of controlling the loading, unloading and moving the blanks in an annular furnace provides a reduction in the cycle of loading - moving - unloading, the possibility of laying out blanks on the layout radius with equal intervals between them and therefore the possibility of building systems for controlling the thermal regime of annular heating furnaces taking into account thermal load and the geometric dimensions of the workpieces, improving the technical and economic characteristics of ring furnaces.

Claims (1)

Invention Formula The method of controlling the loading, unloading and moving the blanks in an annular furnace, including controlling the presence of blanks at the unloading positions, measuring the width of the blanks to be loaded, sequentially measuring the path for the loading mechanism, loading the next blank, characterized in that to reduce the cycle time loading - movement - unloading and uniform layout of the workpieces along the radius of the furnace, after measuring the width of the workpiece, the path of the loading mechanism is calculated before on the receiving roller table in accordance with the first mathematical expression: 0Р a0 - у-, where Dp is the path of the loading mechanism on the receiving roller table; a0 is the distance from the loading window to the rear position of the loading mechanism; L3 - the width of the workpiece to be loaded then sequentially moving the loading mechanism and gripping the workpiece on the receiving roller, and depending on the width of the loaded workpiece, calculating the path of moving the loading mechanism in the furnace and arranging the workpiece on the furnace radius evenly, but in accordance with the second mathematical expression Di Lp - n - And n + (n-1) U, ,Max, Where A - p, | Max distance between workpieces located on the bottom of the floor for x -n n and posad, and max on this radius; DI - the path of the loading mechanism in the furnace working area; Lp is the working width of the furnace hearth; 1p, max - the maximum width of the blanks for the n-r of the bottom; n - the number of blanks loaded on the layout radius; m - the maximum number of blanks to be loaded on the layout radius; 1 1.2p, Then, the bottom of the furnace is moved, which is stopped when the blanks arrive at the unloading position in the furnace, after the blanks reach the unloading position to unload the blanks from the furnace, the unloading mechanism is moved for a distance in accordance with the first and second mathematical expressions, the completion of the unloading, the hearth is moved and then the loading and unloading is carried out simultaneously, with Table 1 table 2 f 1 / 9.1 Par.2 Ra (/ ue / oACJMAfac / / U "a # mind jae / wjxt / j / oxex #Of s ojtof # -9M # l. jat / ryjxt /