CN105013836A - Device and method for controlling rolling force of temper mill in non-extending rate detection state - Google Patents
Device and method for controlling rolling force of temper mill in non-extending rate detection state Download PDFInfo
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Abstract
The invention provides a device and method for controlling rolling force of a temper mill in a non-extending rate detection state, and belongs to the technical field of cold-rolled strip steel production. On the basis that the temper mill extending rate control principle is researched, the rolling force control program of the temper mill is improved through optimization, and the problem that an unreasonable rolling force set value causes extending rate jumping in the non-extending rate detection state when the temper mill operates at a low speed is alleviated. According to the core thought, the rolling force practical set value of the temper mill is properly stored and applied, and the purposes of optimizing rolling force optimization control and alleviating the rolling force jumping problem of the temper mill in the starting and parking processes are achieved. Internal parameter setting of the control program is optimized through analysis of a large number of data, and a man-machine interface function is added to perfect control. The method has the advantages that the number of arrangement products and defective products can be reduced by operators through simple operation selections, secondary work of a rewinding unit is avoided, production efficiency can be effectively improved, energy consumption is reduced, and good economic benefits and popularization value are achieved.
Description
Technical field
The invention belongs to cold rolled strip steel production technical field, by optimizing planisher in the rolling force setup value without percentage elongation detected state, alleviation planisher plays the percentage elongation jump problem in docking process, reduces the defect ware of band steel, can be widely used in cold rolled strip steel production planisher system.
Background technology
Connecting moves back in line production process, and planisher can carry out start-stop operation or fall-back according to outlet process demand.At planisher from dead ship condition to running status during (speed is more than or equal to 30m/min) transition or low cruise (speed is less than 30m/min), roll-force control system cannot provide rational rolling force setup value.So system just using secondary set-point or manual setting value as a reference value, when so each planisher plays parking, roll-force can jump to a reference value suddenly from actual roll-force, because difference of them is comparatively large, there is serious saltation electrophoresis.Roll-force kick problem causes the actual percentage elongation of control period product too large with setting percentage elongation deviation, percentage elongation deviation is maximum reaches 200%, and then percentage elongation to adjust to transit time of desired value longer, meanwhile cause the band steel plate type of adjustment process output poor.Usually each parking can cause the inferior or waste product of about 20 meters, directly has influence on strip quality.The defect ware caused needs to carry out secondary production to rewinding unit, causes production capacity reduction, energy consumption increase, directly has influence on production efficiency and economic benefit.Therefore when planisher low-speed run state produce cannot given percentage elongation, to roll-force control be optimized be output strip line thirst for for a long time solve realistic problem.
Summary of the invention
The object of the invention is to by controlling to be optimized in the roll-force without percentage elongation detected state to planisher, alleviate roll-force kick problem and cause the actual percentage elongation of control period product and setting percentage elongation deviation, reduce fluctuation range and the strip length of percentage elongation deviation more than 10% of band steel percentage elongation.
Connect the control mode of moving back line planisher percentage elongation and have that roll-force controls, roll-force and tension force controls, volume per second control Three models, producing normally used is roll-force control model.The principle being controlled percentage elongation by roll-force control model is: percentage elongation is controlled by roll-force, before utilizing planisher, after 7# idler roller home roll speed and planisher, the speed difference of 8# idler roller home roll calculates actual percentage elongation, then adjusts according to the setting value of deviation to roll-force of actual percentage elongation with setting percentage elongation.Setting value according to above-mentioned principle planisher roll-force is made up of two parts, and one is manual setting value or secondary setting value, the i.e. setting section of planisher roll-force; Two is the roll-forces adjusted with the deviation of setting percentage elongation according to actual percentage elongation, i.e. adjustment member, two parts form the actual setpoint of planisher roll-force jointly.Without percentage elongation detected state planisher roll-force control and optimize, to start with research from the setting section of planisher rolling force setup value exactly, rise when vehicle speed is less than 30m/min at planisher and provide rational rolling force setup value.So programming stores planisher roll-force actual value when planisher parking period planisher speed is 30m/min, when during planisher cycling start, speed is less than 30m/min, using the roll-force of storage as the manual setting value of roll-force, and the in good time manual setting value to roll-force and actual setpoint are analyzed and then make further adjustment.
The present invention, compared with before the optimization of planisher roll-force, is alleviated planisher and is played roll-force kick problem in docking process, reduces the fluctuation range of band steel percentage elongation, reduces the strip length of percentage elongation deviation more than 10%.In practical application, edit-modify is carried out to Human-machine Control interface, newly-increased " performing Optimum Operation button ", corresponding execution roll-force optimal control program.
Without planisher roll-force control device under percentage elongation detected state, control device comprises PLC system 1, Human-machine Control interface 9, engineer station 8, OBT optical-electrical converter 10, switch 11,7# idler roller frequency converter 6,8# idler roller frequency converter 7;
Described PLC system 1 comprises SPM-PLC module 2, FM458 functional module 3, DP communication module 4, ethernet communication module 5.
7# idler roller frequency converter 6,8# idler roller frequency converter 7 are set up DP communication by OBT optical-electrical converter 10, DP line 12 with DP communication module 4 and are connected; Engineer station 8 is set up ethernet communication and is connected by three-ethernet line 15 with switch 11, first Ethernet 13, ethernet communication module 5 by the second ethernet line 14, Human-machine Control interface 9;
Specifically see the gridless control chart of accompanying drawing 1 planisher roll-force.
Arrange in Human-machine Control interface 9 and perform Optimum Operation button, perform optimizer for activator button before planisher parking, cycling start.To " perform Optimum Operation button " be in state of activation be condition 1.
In engineer station 8, as trigger command when planisher speed is 30m/min during reduction of speed, gather planisher roll-force actual value at this moment.When during next cycling start, speed is less than 30m/min, the rolling force setup value of storage is given in the manual setting value of roll-force.Planisher speed reduction of speed is defined as condition 2 to 30m/min; Planisher is played vehicle speed to be less than 30m/min and to be defined as condition 3.
For avoiding mutation problems, when planisher speed is greater than 30m/min, when actual setpoint is greater than 2.4 times of manual setting value, program manual setting value within each scan period is automatically adjusted and is increased 100N.Planisher speed is greater than 30m/min and actual setpoint is greater than 2.4 times of manual setting value is defined as condition 4.
When condition 1 meets, perform Optimum Operation button activation, start to perform optimizer;
When condition 1 meets, condition 2 meets, and stores roll-force actual value when now planisher speed is 30m/min;
When condition 1 meets, condition 3 meets, using under the roll-force actual value that stores as the manual setting value of roll-force;
When condition 1 meets, condition 4 meets, and program manual setting value within each scan period is automatically adjusted and increased 100N.
Without planisher roll-force control method under percentage elongation detected state, concrete steps are as follows:
Step one, arrange perform Optimum Operation button in Human-machine Control interface, will " perform Optimum Operation button " be in state of activation be condition 1.
Step 2, when during reduction of speed, planisher speed is 30m/min as trigger command, gather planisher roll-force actual value at this moment; When during next cycling start, speed is less than 30m/min, the rolling force setup value of storage is given in the manual setting value of roll-force.Planisher speed reduction of speed is defined as condition 2 to 30m/min; Planisher is played vehicle speed to be less than 30m/min and to be defined as condition 3.
For avoiding mutation problems, when planisher speed is greater than 30m/min, when actual setpoint is greater than 2.4 times of manual setting value, program manual setting value within each scan period is automatically adjusted and is increased 100N.Planisher speed is greater than 30m/min and actual setpoint is greater than 2.4 times of manual setting value is defined as condition 4.
Step 3,
When condition 1 meets, perform Optimum Operation button activation, start to perform optimizer;
When condition 1 meets, condition 2 meets, and stores roll-force actual value when now planisher speed is 30m/min;
When condition 1 meets, condition 3 meets, using under the roll-force actual value that stores as the manual setting value of roll-force;
When condition 1 meets, condition 4 meets, and program manual setting value within each scan period is automatically adjusted and increased 100N.
When planisher roller replacing operation or interim reduction of speed stop, operative employee clicks in Human-machine Control interface and performs " Optimum Operation button ", when the speed of planisher drops to 30m/min, one-level program receives rising edge trigger command, planisher roll-force actual value is now stored in variable, when speed after planisher cycling start is less than 30m/min, the roll-force being saved in variable is before given in manual setting value.In order to avoid the sudden change after 30m/min, be greater than 30m/min and actual setpoint is greater than 2.4 times of manual setting value in planisher speed, program manual setting value within each scan period is automatically adjusted and is increased 100N.
Advantage good effect of the present invention is:
By optimizing planisher rolling force setup value, make up planisher low cruise, without percentage elongation detection and then without the defect of percentage elongation deviation to roll-force saltus step under rolling force setup value adjusted value state.Newly add and perform Optimum Operation button, convenient operation work operates, and makes the control variation to planisher percentage elongation.After adopting optimizer, the percentage elongation mutation problems of planisher obtains alleviation, reduces the fluctuation range of percentage elongation, reduces the strip length of percentage elongation deviation more than 10%.Reducing the output of defect ware and agreement product, to enhancing productivity and the important realistic meaning of economic benefit, there is good application value.
Accompanying drawing explanation
Fig. 1 is the gridless control chart of planisher roll-force: S7-400PLC system 1, PLC system SPM CPU module 2, FM458 functional module 3, DP communication module 4, ether communication module 5,7# idler roller frequency converter 6,8# idler roller frequency converter 7, engineer station 8, Human-machine Control interface 9, OBT optical-electrical converter 10, switch 11, DP netting twine 12, first ethernet line 13, second ethernet line 14, three-ethernet line 15.
Fig. 2 planisher roll-force optimal control flow chart.Condition 1, condition 2, condition 3, condition 4 are as previously mentioned in the definition.
Detailed description of the invention
The present invention relates to: PLC system SPM CPU module, FM458 functional module, Human-machine Control interface, engineer station, DP communication module, ethernet communication module, OBT optical-electrical converter, switch, 7# idler roller frequency converter, 8# idler roller frequency converter etc.7# and 8# idler roller frequency converter passes through DP communication module by velocity feedback to FM458 functional module, and FM458 calculates 7# and 8# idler roller speed difference and obtains the actual percentage elongation of planisher; PLC system SPM CPU module, by comparing the actual percentage elongation of planisher and setting percentage elongation, obtains the adjustment member of the setting value of planisher roll-force; Correct planisher rolling force setup value is issued, and then reaches the object of adjustment idler roller speed and percentage elongation by DP communication module control motor, frequency converter.Specifically see the gridless control chart of accompanying drawing 1 planisher roll-force.
Concrete enforcement is divided into the debugging of control program off-line, on-line debugging, program parameter to optimize three parts.
1, control program off-line debugging
The debugging of control program off-line comprises the off-line debugging to human-computer interface control picture and engineer station
(1) make execution Optimum Operation button at former control interface, increase order and state two labels, realize the communication of one-level program.Realize the program function of button with order and state in engineer station.
(2) when stopping when planisher speed is 30m/minm/, the planisher rolling force setup value in this time is stored.Time when cycling start when speed is less than 30m/min, the rolling force setup value of storage is given in the manual setting value of roll-force.
(3) for avoiding mutation problems, when speed is greater than 30m/min, actual setpoint is greater than 2.4 times of manual setting value, and program manual setting value within each scan period is automatically adjusted and increased 100N.
2, on-line debugging
Start and perform Optimum Operation button, the control program of online program monitoring planisher roll-force, makes the internal logic in program rationalize.Whether the speed of checking when the planisher rolling force setup value of planisher when equaling 30m/min that declines is saved in variable timely, if find do not have storing and setting value, checks whether the execution Optimum Operation button in man-machine control inerface is activated.If find that button state is not to maybe preserving variable, check that whether the communication between the label of man-machine interface and PLC program is correct, then check that in PLC program, whether set-reset flip-floop state is normal, system can put into operation.
3, program parameter optimization
Carry out at thread test through coordination, the debugging of program is summarized and the result tested is analyzed, reasonably to program parameter optimization.Test proves that planisher roll-force optimizer performs front and back, adopt PDA (data acquisition and analysis software) data analysis, before optimizing, percentage elongation sudden change maximum reaches about 100-200%, and percentage elongation deviation exceeds the band steel of 10% beyond about 15-20m.Perform percentage elongation change about 25-35% after optimizer, percentage elongation deviation exceed 10% band steel the longest less than about 5-8m.
Claims (3)
1. without planisher roll-force control device under percentage elongation detected state, it is characterized in that: control device comprises PLC system (1), Human-machine Control interface (9), engineer station (8), OBT optical-electrical converter (10), switch (11), 7# idler roller frequency converter (6), 8# idler roller frequency converter (7);
Described PLC system (1) comprises SPM-PLC module (2), FM458 functional module (3), DP communication module (4), ethernet communication module (5);
7# idler roller frequency converter (6), 8# idler roller frequency converter (7) are set up DP communication by OBT optical-electrical converter (10), DP line (12) with DP communication module (4) and are connected; Engineer station (8) is set up ethernet communication and is connected by three-ethernet line (15) with switch (11), the first Ethernet (13), ethernet communication module (5) by the second ethernet line (14), Human-machine Control interface (9).
2. control device as claimed in claim 1, is characterized in that: arrange in described Human-machine Control interface (9) and perform Optimum Operation button, performs optimizer for activator button before planisher parking, cycling start.To " perform Optimum Operation button " be in state of activation be condition 1;
In described engineer station (8), as trigger command when planisher speed is 30m/min during reduction of speed, gather planisher roll-force actual value at this moment; When during next cycling start, speed is less than 30m/min, the rolling force setup value of storage is given in the manual setting value of roll-force; Planisher speed reduction of speed is defined as condition 2 to 30m/min; Planisher is played vehicle speed to be less than 30m/min and to be defined as condition 3;
When planisher speed is greater than 30m/min, when actual setpoint is greater than 2.4 times of manual setting value, program manual setting value within each scan period is automatically adjusted and is increased 100N; Planisher speed is greater than 30m/min and actual setpoint is greater than 2.4 times of manual setting value is defined as condition 4;
When condition 1 meets, perform Optimum Operation button activation, start to perform optimizer;
When condition 1 meets, condition 2 meets, and stores roll-force actual value when now planisher speed is 30m/min;
When condition 1 meets, condition 3 meets, using under the roll-force actual value that stores as the manual setting value of roll-force;
When condition 1 meets, condition 4 meets, and program manual setting value within each scan period is automatically adjusted and increased 100N.
3., without planisher roll-force control method under percentage elongation detected state, it is characterized in that:
Step one, arrange perform Optimum Operation button in Human-machine Control interface, will " perform Optimum Operation button " be in state of activation be condition 1;
Step 2, when during reduction of speed, planisher speed is 30m/min as trigger command, gather planisher roll-force actual value at this moment; When during next cycling start, speed is less than 30m/min, the rolling force setup value of storage is given in the manual setting value of roll-force; Planisher speed reduction of speed is defined as condition 2 to 30m/min; Planisher is played vehicle speed to be less than 30m/min and to be defined as condition 3;
When planisher speed is greater than 30m/min, when actual setpoint is greater than 2.4 times of manual setting value, program manual setting value within each scan period is automatically adjusted and is increased 100N; Planisher speed is greater than 30m/min and actual setpoint is greater than 2.4 times of manual setting value is defined as condition 4;
Step 3,
When condition 1 meets, perform Optimum Operation button activation, start to perform optimizer;
When condition 1 meets, condition 2 meets, and stores roll-force actual value when now planisher speed is 30m/min;
When condition 1 meets, condition 3 meets, using under the roll-force actual value that stores as the manual setting value of roll-force;
When condition 1 meets, condition 4 meets, and program manual setting value within each scan period is automatically adjusted and increased 100N.
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| CN201510441734.8A CN105013836B (en) | 2015-07-25 | 2015-07-25 | Without planisher rolling force control device and its method under elongation percentage detection state |
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| CN201510441734.8A CN105013836B (en) | 2015-07-25 | 2015-07-25 | Without planisher rolling force control device and its method under elongation percentage detection state |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107520256A (en) * | 2017-09-12 | 2017-12-29 | 首钢集团有限公司 | The control method of smooth elongation percentage during a kind of planisher start and stop car |
| CN113649420A (en) * | 2021-07-28 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Temper mill rolling force obtaining method and device |
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| JPH04224010A (en) * | 1990-12-26 | 1992-08-13 | Kawasaki Steel Corp | Method for controlling rolling down force in temper rolling of steel strip |
| CN201342426Y (en) * | 2008-12-18 | 2009-11-11 | 鞍钢集团自动化公司 | TDC hot rolling skin pass mill control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107520256A (en) * | 2017-09-12 | 2017-12-29 | 首钢集团有限公司 | The control method of smooth elongation percentage during a kind of planisher start and stop car |
| CN107520256B (en) * | 2017-09-12 | 2019-07-02 | 首钢集团有限公司 | The control method of smooth elongation percentage during a kind of planisher start and stop vehicle |
| CN113649420A (en) * | 2021-07-28 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Temper mill rolling force obtaining method and device |
| CN113649420B (en) * | 2021-07-28 | 2023-10-24 | 首钢京唐钢铁联合有限责任公司 | Temper mill rolling force obtaining method and device |
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