SU553020A1 - Automatic control system for gripping the reversing reversing rolling mill - Google Patents

Description

delays, the main drive speed sensor is connected to the mill roll direction node and to the nerve input of the gaps selection signal generation unit, the roll rollers speed sensor is connected to the roll roll rotation direction node, the control signal source is connected to the input of the control signal spacing node and to the second input of the signal shaping unit for selecting gaps, sensor outputs for the presence of roll in front of the rolls, the delay unit, the knots and the direction of rotation of the rolls and rolls The rollers and the node for the selection of the sign of the control string are connected to the corresponding inputs of the coincidence circuit, the output of which is connected to the third input of the gap selection signal generation unit whose output is connected to the control system of the main drive.

The drawing shows a block diagram of a system for one direction of rolling (for example, as the process progresses).

The system contains: a delay unit 1, a gap selection signal generation unit 2, a main drive control system 3, a rolling force sensor 4, a main drive speed sensor 5, a main roll speed sensor 6, a roll 7 presence in front of the rolls, a control source 8 sigial, rolling rollers rotation direction node 9, roll rollers rotation direction node 10, control signal mark selection node 11, coincidence circuit 12, one-shot 13, inverter 14, assembly 15, control jump increment 16 control signal increment unit 17, control signal increment unit 17, control signal storing unit 18, inverter 19, coincidence circuit 20, control signal generation unit 21, drive motor 22, valve converter 23, current regulator 24, regulator 25 Oe. DS and the setting of 26 and performances.

In the initial state, when there is no roll in front of the mill rolls, there are low levels at the inputs of the circuit 12. At that, in block 2 of node 16, 17 and 18, the zero level signals are sent to the corresponding inputs of node 21, and the control signal of source 8 unchanged through the coincidence circuit 20, opened by a high level of the output signal of the inverter 19, is a node 21 for generating a control signal (block 2) enters the unit 26 intensity of the main drive control system 3.

When a roll is fed to the mill rolls and there is a control signal from source 8, inputs from nodes 9 and 10 respectively receive signals from speed sensor 5 of the main drive and speed sensor 6 of stationary rollers, and from outputs of nodes 9, 10, And the corresponding inputs of circuit 12 matches are high. At the output of sensor 4

the presence of rolling forces is low, and from the output of the assembly 15 to the circuit 12 a high level is applied. When sensor 7 is triggered, the rollout in front of the mill rolls from the output of circuit 12 is high. In this case, the low level of the output signal of the inverter 19 in block 2 of the circuit 20 closes and outputs a zero level to the corresponding input of the node 21, and in the node 18 the signal of the source 8 is memorized, which is fed to the input of the node 21, and a jump-like increment is output from the node 16 , its signal is proportional to the speed of the main drive. A constant increment of the control signal is output from the node 17 at a predetermined rate. The output signals of the nodes 16, 17, 18 are output to the corresponding inputs of the control signal generating unit 21, in which the summation of all three channels originates. From the node 21 of the unit 2, the generated control signal is fed to the input of the intensity setting unit 26 of the system 3.

The step-wake of the control signal is permitted. select the gaps in the spindle joints, if any, and a smooth increase in the control signal allows the spindle joints to be kept closed.

With a high signal level at the output of circuit 12, node 18 monitors the maximum level of the control signal of source 8, which provides an opportunity to increase the control signal with a tempo determined by source 8 and node 17. When reducing the value of the control signal of source 8, node 18 remembers the maximum the value that the signal had on the considered time interval.

At the moment of rolling, the rolling rolls from the rolling force sensor 4 produce a high level, at which the one-shot 13 is triggered, but the falling edge of the signal of which by the output signal from the assembly 15 blocks the coincidence circuit 12, and lows from the output of circuit 12 to block 2. In this case, the nodes 16, 17, 18 deliver the zero-level signals to the inputs of the node 21, and the control signal of the source 8 goes through the circuit 20 and the node 21 without changing to the unit 26 of the intensity of the system 3.

Further rolling speed adjustment before the roll is rolled by the rolls is produced according to the signal from the source 8, passing unchanged through the circuit 20 and the node 21. The signal of the one-shot 13 provides an increment of the control signal by the knot 17 after the roll is caught by the rolls by the operator’s reaction time (0.2 - 0.4 C).

After ejection of rolling stock by rolling rolls, the circuit comes back to its initial state. For the reverse direction of rolling (on reversing rolling mills), the device scheme is similar.

The magnitude of the jump increment of the control signal must correspond to such an increment of speed, which ensures the choice of gaps in the spindle joints x until the roll is captured by the rolling rollers. For example, on blooming, “1300, when a roll is indicated by a sensor, the roll is in front of the rolls at a distance of 0.7 m from the axial plane of the rolls and the speed is 1 rpm, the rolls are 60 rpm, taking into account the main drive lag, the increments of the control signal should correspond to an increment of the speed of rotation of the mill rolls of about 5 rpm. The smooth increment of the control signal should correspond to an increment of the rotation speed of the main drive 0.3-0.5 rpm.

The proposed system on reversible and non-reversible rolling stacks with single multi-coil rolling, irrespective of the way the drive rolls are controlled, provides the mode for capturing the stock with closed gaps in the spindle joints, which increases the equipment durability and enables high irok mill to be achieved.

Claims (1)

Invention Formula Automatic control system for gripping the reversing reversing rolling mill, comprising a rolling force sensor, a main drive speed sensor, a rolls speed sensor, a roll presence sensor in front of the rolls, a control signal source, a rolling roll rotation direction node, a stationary shaft direction node rollers, a control signal character extraction unit, a main drive control system, characterized in that, in order to prevent the roll from being caught by the rolling mill and the open gaps in spindle joints and limited dynamic loads on the main line equipment of the mill during single and multi-ingot rolling, it further comprises a gap selection signal shaping unit, a delay unit, a mounting circuit, the rolling force sensor 1 being connected to the delay unit, a sensor main drive speeds connected to the rolling rollers direction assembly and to the first input of forming a gap selection signal, the speed sensor of the roll rollers is connected to the rotation rollers node of the roll rollers, and the source of the hedging signal is connected to the input of the equalizing sign generator node and to the second input of the formation block of the gap selector , the outputs of the sensor presence of roll before irokatnomn valkamn, the delay unit, the rolling mills rotation nodes and the roll rollers and the control signal character extraction unit are connected to the corresponding inputs of the coincidence circuit, the output of which is connected to the third input of the gap selection signal generating unit whose output is connected to the main drive control system. Sources of information that are irrespective of the examination: I. "The system of automatic control of the main drive. Technical project, No. OLA082, 349, VNIIelektroprivod, 1962, p. 10, 59.