CN103223423A - Control method for walking-stopping type high-side-pressure sizing press - Google Patents
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Abstract
The invention relates to a control method for a walking-stopping type high-side-pressure sizing press. The control method is applied to a control system of a Shougang Jingtang 1580 hot rolling sizing press. The control method comprises the following steps: controlling the speed of a slab subjected to horizontal centering when the plate blank passes through an extrusion chamber of the sizing press to be oblique triangle waveform; switching position control and pressure control of an inlet guide roller and an outlet guide roller of the sizing press by a control window; sending out a starting signal of each roller way when a main motor of the sizing press departs from a stretching angle only with 2-degree superposition; tracking the heat part and the tail part of the slab respectively; when realizing pressure control by utilizing a proportion-integration-differentiation (PID) controller of an integer parameter of a PAC controller of the GE Company, dividing a control factor (actually adopting the integer 10) from the output value of the controller and setting the PID parameter, so that the control precision of the controller is improved. By the control method, the rolling rhythm and the control precision are improved. A good effect is achieved when the control method is applied to control of the Shougang Jingtang 1580 hot rolling sizing press.
Description
Technical field
The invention belongs to the control technology field of large lateral pressure constant width machine in the hot continuous rolling production process, be specifically related to a kind of control method of walking to stop formula large lateral pressure constant width machine.
Background technology
Slab side pressure constant width machine (Slab Sizing Press, the English SSP that is called for short, Chinese is called for short constant width machine) as the wide equipment of the accent of hot rolling large lateral pressure, it is rolling under as-forged the slab total length to be carried out big width of plate slab, by a time side pressure, the Breadth Maximum drafts can reach 350mm; And vertical miller is rolled slab under the state of rolling, rolling through 1～5 passage, and the lateral pressure amount maximum is no more than 100mm.Can only by a small margin side pressure and realization width control (AWC) automatically as horizontal mill front attached edger, adopt the higher no level width of constant width machine realization of efficient to depress.
Because constant width machine is rolled under as-forged slab, its metal deformation state and vertical miller are completely different, so the blank front and back cutting head cutting tail loss that constant width machine shuts out is little, promptly reduces to 0.2%～0.3% by 0.6%～0.7% of the past, by reducing the recovery rate (reference paper 1: Han Chunying that fish tail has improved steel greatly, Zhao Wei, Su Zhaofa, Lei Zhiying, " performance characteristics of Fixed width forcing press in the hot continuous rolling process ", the Anshan iron and steel plant technology, 2000.7).In addition, it is wide because the width adjusting amount of constant width machine is big, this has not only increased the slab caster width of on average casting, and be increased to 200mm by 50mm for the casting width of slab caster, reduced the kind of continuous casting steel billet width specifications, improved the production capacity and the effect of slab caster greatly, simultaneously absolute effect has been played in the stable operation of slab caster.
Shoudu Iron and Steel Co capital Tang 1580 hot rolling lines include roughing mill R1, R2, and with the supporting vertical miller E1 of roughing mill, E2, heating furnace, constant width machine (SSP), De-scaling box behind the stove (HSB) or the like, Fig. 1 are the part layout drawings of Shoudu Iron and Steel Co capital Tang 1580 hot rolling lines.D1 and D2 are the inlet/outlet roller-way of constant width machine SSP, and D3, D4, D5, G1, G2 and G3 are the inlet/outlet roller-way of roughing mill R1.
As shown in Figure 1, constant width machine is between De-scaling box and roughing mill R1.The slab after de-scaling that heating furnace is sent is transported to flipper guide before the constant width machine by constant width machine inlet roller-way; Finish horizontal centring by flipper guide before the constant width machine then; Transmit by constant width machine inlet electric machines for roller, entrance and exit pinch roll and entrance and exit deflector roll that slab enters again and by extrusion chamber, the slab that Fixed width is finished in extruding at last via constant width machine after roller-way transmit downstream.Through in the process of extrusion chamber, the large lateral pressure constant width machine is to lean on the continuous side pressure of the tup module of two symmetric motions to slab to the side pressure of slab at slab, realizes the wide and slab plate shape adjusting end to end of accent of slab.The contact-making surface of tup module and slab is the plane, and this just is equivalent to directly for infinitely-great edger roll slab be carried out side pressure with roller.
The Fixed width mode of constant width machine is meant that the inlet roller-way of constant width machine and outlet roller-way and entrance pinch roll and outlet pinch roll pinch the extrusion chamber of slab by constant width machine with the motion mode of stepping, and slab is through the tup extruding of main driven by motor in extrusion chamber.In the squeeze mode, according to entrance pinch roll and outlet pinch roll when stopping, stroke that depressing motor whether change and be divided into the short stroke pattern and etc. wide mode.The stroke of depressing motor when the short stroke pattern is meant the slab head by tup progressively reduces, and the slab afterbody is when the tup, and the stroke of side pressure motor progressively increases; The stroke of depressing motor when being meant slab by tup Deng wide mode remains constant.
When constant width machine was operated in squeeze mode, slab was a Fixed width speed by the speed of extrusion chamber, and the waveform of Fixed width speed is the isosceles triangle wave waveform in cycle, and rolling rhythm is certain, can not increase.The inlet roller-way of constant width machine, entrance pinch roll, constant width machine outlet pinch roll and constant width machine outlet roller-way, setting according to single step step pitch parameter, according to the accurate tracking of the code-disc on constant width machine inlet bottom pinch roll or the outlet bottom pinch roll power transmission shaft, be in the side pressure that (between 20 ° and 240 °) in the idle angular range are finished the accurate conveying of step pitch band steel and presetted the position in the rotation of constant width machine master motor rotating band movable eccentric wheel to blank.
Summary of the invention
The present invention is directed to the precision control and the rolling rhythm control problem of existing constant width machine, proposed a kind of control method of walking to stop formula large lateral pressure constant width machine.
A kind of control method of walking to stop formula large lateral pressure constant width machine is applied in the Shoudu Iron and Steel Co capital Tang 1580 hot rolling constant width machine control systems, comprises the steps:
Step 1, the slab that horizontal centring is finished in the control speed during by the constant width machine extrusion chamber is the oblique triangle waveform; Specifically be, the inlet roller-way of control constant width machine, entrance pinch roll, outlet pinch roll and outlet roller-way, in boosting velocity procedure, the limit acceleration raising speed that adopts transmission device is to the Fixed width target velocity of setting, when slowing down, requirement according to the stepping location decelerates to 0 speed with the slope that calculates, and realizes the slab Fixed width when 0 speed;
Step 2, the Position Control and the pressure control of switching constant width machine inlet deflector roll and outlet deflector roll by the control window; Specifically be, for the position tracking provides the control window, utilize the control window of slab head tracking, by entrance pinch roll pressure examine the time-delay of signal and inspection inactivating signal, the Position Control and the pressure control of switching constant width machine inlet deflector roll, afterwards, the control window that utilizes the slab afterbody to follow the tracks of, by the outlet Withdrawal roll pressure examine with the time-delay of inspection inactivating signal, the Position Control and the pressure control of switching the outlet deflector roll make and switch more reliable into the position and the pressure control of, outlet deflector roll;
Step 3 differs from 2 degree when leaving the stretching angle at the main motor of constant width machine, sends the enabling signal of each roller-way;
Step 4 is followed the tracks of respectively the head and the afterbody of slab, carries out the Fixed width control of short stroke pattern;
Step 5, when the PID(proportional-integral-differential of the argument of type integer in utilizing the PAC of GE company controller) controller is realized pressure control, adopt earlier output valve to controller divided by controlling elements, and then the pid parameter of adjusting, improved the control accuracy of controller.The actual employing of controlling elements integer 10.
The control method of walking to stop formula large lateral pressure constant width machine provided by the invention by being the oblique triangle Waveform Control with the Fixed width speed improvement, has improved rolling rhythm; Head and afterbody to slab are followed the tracks of respectively, have control accuracy preferably, have realized the Fixed width control of the exact position of short stroke end to end; Adjust before the integer PID controller in the PAC controller, earlier to the controller output valve divided by controlling elements, the pid parameter of adjusting has again improved control accuracy.The inventive method is applied in the control of Shoudu Iron and Steel Co capital Tang 1580 hot rolling constant width machines can obtain good effect.
Description of drawings
Fig. 1 is the part layout drawing of Shoudu Iron and Steel Co capital Tang 1580 hot rolling lines;
Fig. 2 is a flow chart of walking to stop the control method of formula large lateral pressure constant width machine of the present invention;
Fig. 3 is the schematic diagram that the main motor of constant width machine rotatablely moves in the control method of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Shoudu Iron and Steel Co capital Tang 1580 hot rolling constant width machine control systems adopt the GE PAC of company controller RX7i CPE040 CPU, and main cabinet frame work analog quantity functional module adopts the third party of the MEN company template based on the VME bus, and the digital quantity template adopts the GE PAC RX7i's of company; Long-range cabinet adopts the GE VersaMax I/O of company station system.The process function that Shoudu Iron and Steel Co capital Tang 1580 hot rolling constant width machine control systems are mainly finished has that the de-scaling of water under high pressure blank, slab are carried and pinched, slab centering, the pressure balance of slab Fixed width device, tup is changed and fresh water (FW) cooling etc.
The related hardware component of constant width machine control system is arranged in proper order according to the rolling line upstream and downstream, includes: inlet roller-way, inlet deflector roll, entrance pinch roll, extrusion chamber, outlet roller-way, outlet deflector roll and outlet pinch roll.
The slab after de-scaling that the inlet roller-way of constant width machine is sent heating furnace is transported to the preceding flipper guide of constant width machine; The inlet deflector roll of constant width machine and outlet deflector roll, and entrance pinch roll and outlet pinch roll cooperate and be used for accurately transmitting that slab enters and the extrusion chamber by constant width machine are realized extruding Fixed width piecemeal to slab by tup in the extrusion chamber of constant width machine.The slab that the outlet roller-way of constant width machine is finished Fixed width with extruding transmits downstream.
A kind of control method of walking to stop formula large lateral pressure constant width machine provided by the invention is improved existing control method, and as shown in Figure 2, concrete steps are as follows:
Step 1: the speed of the slab that horizontal centring is finished in control during by the constant width machine extrusion chamber is the oblique triangle waveform.To have that Fixed width speed is the isosceles triangle Waveform Control in the control method now, be improved to the oblique triangle Waveform Control.
The implementation of existing isosceles triangle Waveform Control Fixed width speed is: the control mode that inlet roller-way, entrance pinch roll, outlet pinch roll and the acceleration of outlet roller-way in the time of raising speed of constant width machine and acceleration when slowing down are set is identical, all adopts the acceleration that changes according to slab stepping amount.
The present invention adopts the mode of oblique triangular waveform control Fixed width speed to be: the inlet roller-way of control constant width machine, entrance pinch roll, outlet pinch roll and outlet roller-way, in boosting velocity procedure, adopt the limit acceleration of transmission device raising speed to be set to the Fixed width target velocity of setting, optimum acceleration when the limit acceleration of transmission device is exactly raising speed, the acceleration when in the embodiment of the invention raising speed being set are 2.2m/s
2When slowing down, the inlet roller-way of control constant width machine, entrance pinch roll, outlet pinch roll and outlet roller-way, adopt the acceleration that changes according to slab stepping amount, the requirement of locating according to stepping decelerates to 0 speed with the slope that calculates, thereby realizes the slab Fixed width when 0 speed.The inventive method adopts oblique triangular waveform control Fixed width speed, can improve rolling rhythm.
Step 2: the Position Control and the pressure control of switching constant width machine inlet deflector roll and outlet deflector roll by the control window.
In the existing control method, the Position Control and the pressure controlled switching of the inlet deflector roll of constant width machine and outlet deflector roll, the exact position of single dependence slab is followed the tracks of and is realized.
Provide the control window for the position tracking in the inventive method, utilizing the control window of slab head tracking, utilize entrance pinch roll pressure examine signal and the inspection inactivating signal time-delay, realize the Position Control and the pressure controlled switching of constant width machine inlet deflector roll, control window in the tracking of slab afterbody, utilize the outlet Withdrawal roll pressure examine with the time-delay of inspection inactivating signal, realize the Position Control and the pressure controlled switching of outlet deflector roll.Described control window is meant that slab head or afterbody trace in certain coordinates regional of rolling line.This step makes control accuracy more accurate by Position Control and pressure control that the control window switches constant width machine inlet deflector roll and outlet deflector roll.
Step 3: the control of the main motor of constant width machine, response characteristic according to the inlet roller-way of constant width machine, entrance pinch roll, outlet roller-way and outlet pinch roll transmission device, differ from 2 degree when leaving the stretching angle at constant width machine master motor, just send each roller-way enabling signal of (comprising inlet roller-way, entrance pinch roll, outlet roller-way and outlet pinch roll etc.) in advance, thereby utilize the stepping ability of transmission device fully.
As shown in Figure 3, be the schematic diagram of the main motor eccentric shaft motion of constant width machine, 0 °～20 ° are the stretching angular region, and 20 °～240 ° be idle angular region, moves forward once by Position Control at this scope slab.240 °～248.6 ° is the safety angle scope, at this scope device security, can cushion.248.6 °～360 ° for the extruding angular region, in this scope, tup impacts slab and finishes Fixed width.
Step 4: head and afterbody to slab are followed the tracks of respectively, carry out the Fixed width control of the exact position of short stroke end to end.
Because the influence that the slab Fixed width stretches is naturally adopted the slab tracking method of leading to plate in the existing control method, has influenced the slab head tracking, particularly the precision of afterbody tracking.
The present invention adopts the control method of following the tracks of respectively end to end, has reduced because of the slab Fixed width stretches influence to slab tracking naturally, thereby has improved head tracking, and particularly the precision of afterbody tracking has realized that the Fixed width of the exact position of short stroke is controlled end to end.
Step 5: with the output valve of the PID controller in the PAC controller divided by controlling elements, and then the pid parameter of adjusting.
Because proportional gain parameter, storage gain parameter, differential gain parameter, the time of integration and the derivative time of the PID controller in the PAC controller of GE company and the output of PID controller are 16 integer data, if the PID controller that utilizes GE PAC controller to carry carries out the real process closed-loop control, on the output control accuracy, will there be bigger deviation.
The present invention divided by controlling elements 10, improves control accuracy with the output valve of the PID controller in the PAC controller.At the PID controller parameter data type in the PAC controller of GE company, increase the significant digits of parameter, improve control accuracy, accurately PID is controlled in the pressure control and uses.
Control method of the present invention is tested at Shoudu Iron and Steel Co capital Tang 1580 hot rolling constant width machines, and the result proves that the inventive method has improved rolling rhythm, has control accuracy preferably, obtains good actual effect.
Claims (3)
1. a control method of walking to stop formula large lateral pressure constant width machine is applied in the Shoudu Iron and Steel Co capital Tang 1580 hot rolling constant width machine control systems, it is characterized in that, comprises the steps:
Step 1, the slab that horizontal centring is finished in the control speed during by the constant width machine extrusion chamber is the oblique triangle waveform; Specifically be, the inlet roller-way of control constant width machine, entrance pinch roll, outlet pinch roll and outlet roller-way, in boosting velocity procedure, the limit acceleration raising speed that adopts transmission device is to the Fixed width target velocity of setting, when slowing down, requirement according to the stepping location decelerates to 0 speed with the slope that calculates, and realizes the slab Fixed width when 0 speed;
Step 2, the Position Control and the pressure control of switching constant width machine inlet deflector roll and outlet deflector roll by the control window; Specifically be, for the position tracking provides the control window, utilize the control window of slab head tracking, by entrance pinch roll pressure examine signal and the inspection inactivating signal time-delay, switch the Position Control and the pressure control of constant width machine inlet deflector roll, afterwards, the control window that utilizes the slab afterbody to follow the tracks of, by the outlet Withdrawal roll pressure examine with the time-delay of inspection inactivating signal, the Position Control and the pressure control of switching the outlet deflector roll;
Step 3 differs from 2 degree when leaving the stretching angle at the main motor of constant width machine, sends the enabling signal of each roller-way;
Step 4 is followed the tracks of respectively the head and the afterbody of slab, carries out the Fixed width control of short stroke pattern;
When step 5, the PID(proportional-integral-differential of the argument of type integer in utilizing the PAC of GE company controller) controller is realized pressure control, adopt earlier output valve to controller divided by controlling elements, and then the pid parameter of adjusting.
2. the control method of walking to stop formula large lateral pressure constant width machine according to claim 1 is characterized in that, the acceleration in the time of raising speed described in the step 1 is 2.2m/s
2
3. the control method of walking to stop formula large lateral pressure constant width machine according to claim 1 is characterized in that, the controlling elements described in the step 5 adopt integer 10.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722015A (en) * | 2013-12-31 | 2014-04-16 | 一重集团大连设计研究院有限公司 | On-line width adjusting device of hot rolled strip steel production line |
| CN104772344A (en) * | 2014-01-10 | 2015-07-15 | 宝山钢铁股份有限公司 | Hot rolling synchronization type sizing press tracking method |
| CN105983583A (en) * | 2016-06-28 | 2016-10-05 | 首钢京唐钢铁联合有限责任公司 | Steel rejection method for outlet pinch roll of sizing machine |
| CN110508626A (en) * | 2019-07-23 | 2019-11-29 | 北京首钢股份有限公司 | A kind of side compression machine slab method of controlling extrusion |
| CN114558897A (en) * | 2022-02-28 | 2022-05-31 | 首钢京唐钢铁联合有限责任公司 | Fixed-width machine rhythm control method |
| CN114618891A (en) * | 2022-04-06 | 2022-06-14 | 山东钢铁集团日照有限公司 | Control method for solving block of area of slab sizing machine |
| CN114669599A (en) * | 2022-02-28 | 2022-06-28 | 首钢京唐钢铁联合有限责任公司 | Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722015A (en) * | 2013-12-31 | 2014-04-16 | 一重集团大连设计研究院有限公司 | On-line width adjusting device of hot rolled strip steel production line |
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| CN105983583A (en) * | 2016-06-28 | 2016-10-05 | 首钢京唐钢铁联合有限责任公司 | Steel rejection method for outlet pinch roll of sizing machine |
| CN105983583B (en) * | 2016-06-28 | 2017-11-28 | 首钢京唐钢铁联合有限责任公司 | A kind of throwing steel method of constant width machine outlet pinch roll |
| CN110508626A (en) * | 2019-07-23 | 2019-11-29 | 北京首钢股份有限公司 | A kind of side compression machine slab method of controlling extrusion |
| CN114558897A (en) * | 2022-02-28 | 2022-05-31 | 首钢京唐钢铁联合有限责任公司 | Fixed-width machine rhythm control method |
| CN114669599A (en) * | 2022-02-28 | 2022-06-28 | 首钢京唐钢铁联合有限责任公司 | Method for prolonging on-machine time of hammerhead of hot-rolling width-fixing press |
| CN114558897B (en) * | 2022-02-28 | 2024-03-19 | 首钢京唐钢铁联合有限责任公司 | Rhythm control method of width-fixing machine |
| CN114618891A (en) * | 2022-04-06 | 2022-06-14 | 山东钢铁集团日照有限公司 | Control method for solving block of area of slab sizing machine |
| CN114618891B (en) * | 2022-04-06 | 2023-08-18 | 山东钢铁集团日照有限公司 | Control method for solving problem of area blockage of slab width-fixing machine |
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