SU595027A1 - Device for controlling the mechanism directing rods onto section-rolling mill cooler - Google Patents

Description

one

The invention relates to the processing of metals by pressure.

The closest to the described device according to the technical essence and the achieved result is a device for controlling the mechanism of bar discharge to the refrigerator of a bar mill, containing a control unit, the inputs of which are connected to the presence of bars in the bar transport line to the refrigerator, and the output is connected to the storage unit, connected through the unit of comparison with the unit of the moment of reset, the drive unit of the mechanism of the discharge of the bars 1.

However, when controlling the reset mechanism, it is not taken into account that the acceleration time, and hence the transport time on the roller table from the last stand of the stack to the refrigerator, is different for different bars.

When transporting from the last stand of the mill to the refrigerator, the rods are accelerated to a speed that is 5-10% faster than the rolling speed. The bar, cut off with a flying scissors from a roll, moves for some time with acceleration and then at a steady rate before braking begins on the mechanism of the discharge of bars onto the refrigerator. Since the acceleration of the bar on the roller table depends on many random factors, one bar accelerates faster, the other slower. Therefore, the time of transporting the bar from the last stand to the refrigerator is unstable even for bars of the same length. The control of the mechanism of discharge of bars is without

This factor, therefore, the position of the ends of the bars on the refrigerator after braking is different. The scatter of the positions of the front ends on the refrigerator leads to the fact that the bundled rods cannot be cut into lengths determined by the order. Part of the good rolled is cut, and part is cut into lengths not specified by the order. The aim of the invention is to increase

accuracy stop bars of the same length on the refrigerator.

This is achieved by addition of a time pulse generator, keys, two counters, and a second comparison unit to the device, with the outputs of the counters connected to the inputs of the second unit, the output of which is connected to the drive unit of the bar reset mechanism

the time pulses are connected via keys to the inputs of the counters, the control input of one key is connected via the control unit to the sensors of the presence of switches, and the control input of the other key is connected to the output of the first comparison unit.

The drawing shows a block diagram of a device for controlling the mechanism for the discharge of rods to a refrigerator of a bar mill.

The device contains sensors 1 and 2 of the presence of rods on the line 3 of transporting rods 4 from flying shears 5, located behind the last stand 6 of the mill, to the refrigerator 7. The outputs of sensors 1 and 2 are connected to the input of the control unit 8, performing a logical operation to isolate the ends of the rods in the sections monitored by sensors 1 and 2. Accumulation unit 9 and reset point setter 10 are connected through the first block AND compared to the key input 12. The output of key 12 is connected to the input of the first counter 13. Sensors 1 and 2 are available through control bl 8 are connected to the input of the key switch 14. The output 14 is connected to the input of the second counter 15. The outputs of counters 13 and 15 are connected to the input of the second block 16 sravpeii whose output is connected to the input unit 17, the drive rods relief mechanism. The generator 18 pulses of time connected to the inputs of the keys 12 and 14.

The device works as follows.

Before the start of operation of the mill in the setpoint adjuster 10, the time of the bar reset is set. When the ends of the bar pass through the section controlled by the sensor 1, a signal is generated at the output of the control unit 8, which triggers the accumulation unit 9. As the bar moves to the cooler, the magnitude of the signal at the output of the accumulation unit 9 increases. Simultaneously with the passage of the distance between the sensors 1 and 2, the control unit 8 generates a sigal that opens the key 14, and the pulses of the time generator 18 fill the counter 15. The sensors 1 and 2 monitor the start of the transport line to the refrigerator, i.e. binge zone. The number of pulses recorded in the counter 15 is inversely proportional to the pickup time and the roll to the transport speed. The faster the bar accelerates, the faster the distance, monitored by sensors 1 and 2, will travel, and the smaller the number of pulses will be increased to counter 15. If the signal at the output of the setpoint generator 10 is equal to the bar reset and the output signal of the final unit 9, the nerve unit 11 compares produces a pulse, which is fed to the input of the key 12, and permits the passage of the iltpuls of the generator 18 to the input of the first

counter 13. When equality of the codes of the numbers recorded in the counters 13 and 15 is achieved, the second comparison unit 16 outputs a signal to the input of the block 17 of the bar reset mechanism. The accumulative unit 9 is reset to the initial position by the output signal of the first block And the comparison, and the first 13 and second 15 counters are reset to the initial position by the output signal

the second block 16 comparison (command to reset the bars). When the next bar is reset, the operation of the device is similar.

In the event that the acceleration time of the reset bar is different from the acceleration time of the previous bar, another number is recorded in counter 15 and the bar reset time is determined by the sum of impulses of time generator 18 recruited in ia 9 and counter 15. Thus, the reset command

each rod is fed after the time specified by the reset time setpoint adjuster 10 and after the bar acceleration time, measured by the counter 13, is counted.

Claims (1)

Invention Formula A device for controlling a bar discharge mechanism on a refrigerator of a bar mill, containing a control unit, with inputs of which are sensors for the presence of bars on the bar transfer line to the refrigerator, and the output is connected to a storage unit connected through a comparison unit to a reset torque setting device, The drive unit of the bar reset mechanism, characterized in that, in order to increase the accuracy of stopping the bars of the same length in the refrigeration unit, a time pulse generator, keys, two counters and a second comparison unit are entered into it, the outputs of the counters are connected to the inputs of the second comparison unit, the output which is connected to the drive unit of the bar reset mechanism, the output of the time pulse generator is connected via keys to the inputs of the meters, the control input of one key is connected to the sensors via the control unit lychee rods and control of another key input connected to the output of the first comparator unit. Sources of information taken into account in the examination of the USSR. USSR Copyright Certificate No. 395139, cl. At 21B 37/00, 1973.