CN108787760B - A kind of planisher gap preset device and control method based on four servo valves - Google Patents
A kind of planisher gap preset device and control method based on four servo valves Download PDFInfo
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- CN108787760B CN108787760B CN201710300749.1A CN201710300749A CN108787760B CN 108787760 B CN108787760 B CN 108787760B CN 201710300749 A CN201710300749 A CN 201710300749A CN 108787760 B CN108787760 B CN 108787760B
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- control
- planisher
- valve
- servo
- roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2271/00—Mill stand parameters
- B21B2271/02—Roll gap, screw-down position, draft position
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a kind of planisher gap preset devices and control method based on four servo valves, in normal rolling, position control is realized in the roller rest stage, open loop closed-loop control is carried out respectively by four servo valves, when position control is switched to roll-force control and elongation control, bilateral single valve closed-loop control, four valves control fast and stable response simultaneously, it is ensured that higher control precision are converted by the control of four valves；In rolling extremely, four servo valves can arbitrarily select the single servo valve of two sides to carry out closed-loop control, to realize roller rest and rolling, by the main valve of two sides and the free switching of auxiliary valve, have great significance to abnormal servo valve is detected.The present invention is adapted to the planisher hydraulic roll gap control function of most of rolling mill production line at present.
Description
Technical field
The present invention relates to the automation fields of the cold rolling continuous processing line of metallurgy industry, more particularly to one kind to be based on four
The planisher gap preset method of a servo valve.
Background technique
Modern planisher is controlled using high-pressure hydraulic, mainly including pressure suppling system, servo valve, solenoid valve,
Last executive item is the oil cylinder of hydraulic adjustment, and compared with early stage motor-driven system, hydraulic system is dynamic system, right
The variation of system is accordingly faster.
In the prior art, the control of cold rolling mill continuous annealing temper mill roller is pushed away using hydraulic system is pushed to by two sides in rack
Upper cylinder half acts on roll and realizes roll-force, gap preset.It is exactly that upper backup roll is in a fixed position that so-called planisher, which pushes to system,
Lower backing roll is up leaned on by bottom of the frame, completes roll-force or gap preset task；Planisher, which uses, in normal production always rolls
Force control mode processed, and come into operation rolling force deviation or inclination control guarantee that planisher exports strip shape quality.
In the prior art, cylinder is pushed to using solenoid-driven two sides to move, control is quickly opened and closed for temper mill roller
System, and servo valve driving two sides are pushed to cylinder and are moved, for the control of planisher roll-force and rolling force deviation or inclination control.And not yet
Whether there is or not the functions of detecting abnormal servo valve, and such as encountering valve exception, it will cause the risks of shutdown.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of planisher push to cylinder gap preset device and
Control method, driving two sides to push to jointly by four servo valves, cylinder is dynamic, to realize that the position control of planisher is rolled by abnormal
Molding formula, bilateral only carry out closed-loop control by single servo valve, can detect abnormal valve by switching the servo valve of bilateral mutually
Position, and be able to achieve and guarantee that unit is normally carried out.
To achieve the above object, the present invention is realized according to following technical scheme:
A kind of planisher gap preset device based on four servo valves, including rack, the topping roll moved up and down and under
Roll, pressure pipe road and safety valve,
It further include pushing to cylinder, the cylinder of pushing to is located at bottom of the frame；Cylinder position sensor is pushed to, directly pushes to cylinder with described
Piston be connected, tracking push to cylinder actuating length；Four servo valves, wherein two main servo valves carry out closed-loop control, and two auxiliary
Servo valve carries out opened loop control, and four servo valves drive two sides to push to cylinder jointly and move, to realize the position control of planisher；Bilateral
Push to roll-force and elongation control that cylinder realizes planisher in single servo valve driving two sides.
A kind of planisher gap preset method based on four servo valves of the invention, utilizes above-mentioned gap preset device
It is controlled, it is characterised in that:
The planisher gap preset method is by pushing to the control of hydraulic cylinder and realizing jointly to the control of roller；
It pushes to hydraulic valve bank equipment and realizes that the hydraulic valve bank equipment of pushing to includes behaviour to the control for pushing to hydraulic cylinder
Make side servo valve group, transmission side servo valve group, Back pressure control valve group three parts；The fore side servo valve group and the transmission side
Servo valve group is separately positioned on fore side and transmission side is pushed near hydraulic cylinder, and the Back pressure control valve group setting planisher is attached
Closely by being obtained needed for planisher works normally to hydraulic cylinder enforcing location, roll-force control and elongation control is pushed to
Roll gap and roll-force；
Working roll balances the realization of roller hydraulic valve bank control valve group and controls the balance control of working roll and roller, described logical
Crossing working roll balance roller hydraulic valve bank control valve group includes that roller balance retracts and two circuits of positive and negative roller, the work
Weighing apparatus roller hydraulic valve bank control valve group is rolled out to be set near planisher rack.
In above-mentioned technical proposal, including normal rolling mode and four kinds of abnormal rolling modes.
In above-mentioned technical proposal, the normal rolling mode includes following processes: during roller rest, current volume selection
Using planisher, planisher realizes that position control mode, four servo valves control hydraulic cylinder, fore side and transmission side difference simultaneously
By two servo valve controls, main servo valve carries out closed-loop control, and auxiliary servo valve carries out opened loop control；It is smooth after the completion of roller rest
Machine realizes roll-force control or elongation control, and fore side and transmission side only carry out closed-loop control by main valve at this time.
In above-mentioned technical proposal, four kinds of abnormal rolling modes all only carry out closed-loop control by the single servo valve of two sides, when
When two selected servo valves carry out roller rest, if there is servo valve work in side is abnormal, then roll gap data will also be shown non-
Normal value finds out abnormal servo valve, guarantees that unit is normally carried out by the switching of four kinds of abnormal rolling modes.
Compared with prior art, the present invention having the following beneficial effects:
The roll gap off-gage phenomenon that the invention is simple and feasible, planisher roller rest is avoided to occur, it is smooth to significantly improve tandem mill
Machine lumber recovery is worth promoting in the planisher producing line for having similar solenoid valve control hydraulic cylinder.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 pushes to cylinder system schematic for of the invention；
Fig. 2 is hydraulic roll gap control block diagram of the invention；
Fig. 3 is the normal rolling mode schematic diagram of the present invention；
Fig. 4 is the schematic diagram that planisher is closed in present invention starting；
Fig. 5 is abnormal rolling mode schematic diagram of the invention；
Fig. 6 is the opening curve and roll gap curve of four servo valves of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
Fig. 1 pushes to cylinder system schematic for of the invention；As shown in connection with fig. 1, the present invention is used based on four servo valves
Planisher gap preset device, including rack, the topping roll moved up and down and bottom roll, pressure pipe road and safety valve, topping roll and
The transmission of bottom roll double roller,
It further include pushing to cylinder, the cylinder of pushing to is located at bottom of the frame；Cylinder position sensor is pushed to, directly pushes to cylinder with described
Piston be connected, tracking push to cylinder actuating length；Four servo valves, wherein two main servo valves carry out closed-loop control, and two auxiliary
Servo valve carries out opened loop control, and four servo valves drive two sides to push to cylinder jointly and move, to realize the position control of planisher；Pressure
Oil is provided by high-pressure system.Push to roll-force and elongation percentage control that cylinder realizes planisher in bilateral single servo valve driving two sides
System.
There are four accumulators by planisher rack, wherein being connected directly between before servo valve there are two accumulator pipeline, are
Hydraulic cylinder provides stable buffering oil mass, other two accumulator is the pressure in order to guarantee system back pressure.The case where adjusting
Under, for example, have more higher leveled system control when, system can keep stable response.
Fig. 2 is hydraulic roll gap control block diagram of the invention；As shown in connection with fig. 2, one kind of the invention is based on four servo valves
Planisher gap preset method, controlled using above-mentioned gap preset device, the planisher gap preset method is logical
It crosses the control for pushing to hydraulic cylinder and the control of roller is realized jointly,
It pushes to hydraulic valve bank equipment and realizes that the hydraulic valve bank equipment of pushing to includes behaviour to the control for pushing to hydraulic cylinder
Make side servo valve group, transmission side servo valve group, Back pressure control valve group three parts；The fore side servo valve group and the transmission side
Servo valve group is separately positioned on fore side and transmission side is pushed near hydraulic cylinder, and the Back pressure control valve group setting planisher is attached
Closely.To hydraulic cylinder enforcing location, roll-force control and elongation control is pushed to, to obtain the roller needed for planisher works normally
Seam and roll-force.
Working roll balances the realization of roller hydraulic valve bank control valve group and controls the balance control of working roll and roller, described logical
Crossing working roll balance roller hydraulic valve bank control valve group includes that roller balance retracts and two circuits of positive and negative roller, the work
Weighing apparatus roller hydraulic valve bank control valve group is rolled out to be set near planisher rack.
Including normal rolling mode and four kinds of abnormal rolling modes.
The normal rolling mode includes following processes: during roller rest, current volume selection uses planisher, smooth
Machine realizes that position control mode, four servo valves control hydraulic cylinder simultaneously, and fore side and transmission side are respectively by two servo valve controls
System, main servo valve carry out closed-loop control, and auxiliary servo valve carries out opened loop control；After the completion of roller rest, planisher realizes roll-force control
System or elongation control, fore side and transmission side only carry out closed-loop control by main valve at this time.
Four kinds of abnormal rolling modes all only carry out closed-loop control by the single servo valve of two sides, when two selected servos
When valve carries out roller rest, if there is servo valve work in side is abnormal, then roll gap data will also show outlier, different by four kinds
The switching of normal rolling mode, finds out abnormal servo valve, guarantees that unit is normally carried out.
Specifically, Fig. 3 is normal rolling mode schematic diagram of the invention；The present invention is being applied in specific planisher occasion
In, normally when rolling, by the direct closed-loop control of servo valve SV-SPM-21 and SV-SPM-22, SV-SPM-23 and SV-SPM-24 are not
It controls.During roller rest, four servo valves control HGC hydraulic cylinder simultaneously, and wherein SV-SPM-21 and SV-SPM-22 are closed
Ring control, SV-SPM-23 and SV-SPM-24 carry out opened loop control.
When roller rest, possess four servo valves fast and stable response simultaneously of accumulator link, it is ensured that higher control essence
The step of degree, planisher is closed in the starting of roller rest process, is as shown in Figure 4.Specifically, include the following steps, step 1: starting is automatic
Step；Step 2: roller balances, third and fourth step: roll gap is set to ready position 50mm, at the same anti-crease rollers and anti-jump roller rise to-
(3+ band is thick) position；Step 5: upper lower support roll transmission is synchronous with main line；Step 6: roll gap is set to 5mm Roll-gap position, this
When wait weld seam；It is set step 7: roll gap rises to minimum 30 tonnage of roll-force, and rolling force control signal is enabled；Step 8:
Roll-force reaches picture setting value；Nine, the ten steps: bending roller force reaches setting value, while unit reaches setting speed；11st
Step: elongation percentage is enabled, automatic the end of the step.
Fig. 5 is abnormal rolling mode schematic diagram of the invention；In rolling extremely, four servo valves can arbitrarily select two
The single servo valve of side carries out closed-loop control, to realize roller rest and rolling, while freely cutting by the main valve of two sides and auxiliary valve
It changes, can detecte and abnormal servo valve occur.
The major function of planisher is completed by pushing to cylinder, and required position control and roll-force and extension are provided
Rate.Planisher includes two states on and off.In the on-state, what planisher to be completed is position control；It is closing
In the case of, what planisher was completed is roll-force control.Wherein elongation control is also to be completed by roll-force, by pushing to cylinder
To realize.
Four servo valves of the invention push to what position control was realized according to following principle: when planisher is in open shape
When state, positioner works at this time, is exported by positioner and is given as servo valve, play control push to cylinder position from
And control the effect of roll location.According to control target, roll centre position setting value is generated, and passes through the position sensing with feedback
The position actual value that device obtains compares, and gives position adjusting controller after the inclination setting of additional position, to determine servo
Valve opening degree, to play position adjustment effect.
Physical location detected value is read by position sensor.Position sensor, which is mounted on, to be pushed in cylinder, and the data read are
Rise then sensor reading increasing by the extreme lower position meter for pushing to cylinder, pushing to cylinder.But in position control gap values between rollers calculating be with
Rolling centerline is zero-bit, and positional value increases when pushing to cylinder decline.It then needs to handle sensor reading, and considers
The factors bring change in location such as actual position value, roller diameter, rolling center line position, steel strip thickness for being recorded when calibration, ability
Obtain roll gap actual value.
Four servo valves of the invention push to what roll-force control was realized according to following principle: rising to one when pushing to cylinder
Positioning is set, the contact of roll upper and lower surface, and after generating certain roll-force, then needs to be converted to roll-force control by position control
System.Roll-force control is identical as position control principle, also selected including the selection of rolling force setup value, rolling force deviation setting value,
The links such as practical roll-force detection and calculating, are compared given value with value of feedback by rolling force controller, by controller
Output is used as servo valve regulated quantity, to achieve the purpose that roll-force is stable.Rolling force setup value is rolled when including planisher work
Automatically the given rolling force setup value of logic is walked in the setting value and mode transition procedure of power processed.When planisher works, Ke Yiyou
Operator is according to the rolling force deviation values of plate shape setting two sides.
There is the actual pressure value of pressure sensor detection transmission side and operation.Detected value is handled, and to be examined
The influence for considering other such as positive and negative bending roller force, rollers factor again, finally obtains and pushes to cylinder practical function in the practical rolling on strip
Power.
This invention, under normal rolling, two main servo valves use PID closed-loop control, and two auxiliary servo valves use open loop control
System, the opening curve and roll gap curve of four servo valves as shown in fig. 6, such control mode can achieve fast convergence with
And the effect accurately controlled.
The present invention is during specific experiment, and under normal rolling mode, the control essence of planisher system not only can be improved
Degree, can also improve the template and surface quality of strip, under rolling extremely, not only may determine that abnormal servo valve, may be used also
Guarantee that unit operates normally to carry out rolling.The present invention has larger practical value, and has versatility, the institute after precious letter
Having in cold rolling project can be widely popularized.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (5)
1. a kind of planisher gap preset device based on four servo valves, it is characterised in that: including rack, move up and down it is upper
Roll and bottom roll, pressure pipe road and safety valve,
It further include pushing to cylinder, the cylinder of pushing to is located at bottom of the frame；Cylinder position sensor is pushed to, the direct and work for pushing to cylinder
Plug is connected, and cylinder actuating length is pushed in tracking；Four servo valves, wherein two main servo valves carry out closed-loop control, two auxiliary servos
Valve carries out opened loop control, and four servo valves drive two sides to push to cylinder jointly and move, to realize the position control of planisher；Bilateral only by
Single servo valve carries out closed-loop control, can detect the position of abnormal valve by switching the servo valve of bilateral mutually, bilateral is single
Push to roll-force and elongation control that cylinder realizes planisher in servo valve driving two sides.
2. a kind of planisher gap preset method based on four servo valves, utilizes gap preset device described in claim 1
It is controlled, it is characterised in that:
The planisher gap preset method is by pushing to the control of hydraulic cylinder and realizing jointly to the control of roller；
It is described push to cylinder and refer to push to hydraulic cylinder, push to hydraulic valve bank equipment and realize to the control for pushing to hydraulic cylinder, it is described
Pushing to hydraulic valve bank equipment includes fore side servo valve group, transmission side servo valve group, Back pressure control valve group three parts；The operation
The side servo valve group and transmission side servo valve group is separately positioned on fore side and transmission side is pushed near hydraulic cylinder, the back
Pressure control valve group is arranged near planisher；By to push to hydraulic cylinder enforcing location, roll-force control and elongation control come
Obtain the roll gap and roll-force needed for planisher works normally；
Working roll balances the realization of roller hydraulic valve bank control valve group and controls the balance control of working roll and roller, described to pass through work
Rolling out weighing apparatus roller hydraulic valve bank control valve group includes that the retraction of roller balance and two circuits of positive and negative roller, the work roll out
Weighing apparatus roller hydraulic valve bank control valve group is set near planisher rack.
3. a kind of planisher gap preset method based on four servo valves according to claim 2, it is characterised in that: packet
Include normal rolling mode and four kinds of abnormal rolling modes.
4. a kind of planisher gap preset method based on four servo valves according to claim 3, it is characterised in that: institute
Stating normal rolling mode includes following processes: during roller rest, current volume selection uses planisher, and planisher realizes position
Control, four servo valves control hydraulic cylinder simultaneously, and respectively by two servo valve controls, main servo valve is carried out for fore side and transmission side
Closed-loop control, auxiliary servo valve carry out opened loop control；After the completion of roller rest, planisher realizes roll-force control or elongation percentage control
System, fore side and transmission side only carry out closed-loop control by main valve at this time.
5. a kind of planisher gap preset method based on four servo valves according to claim 3, it is characterised in that: four
The abnormal rolling mode of kind all only carries out closed-loop control by the single servo valve of two sides, when two selected servo valves carry out roller rest
When, if there is servo valve work in side is abnormal, then roll gap data will also show outlier, pass through four kinds of abnormal rolling modes
Switching, find out abnormal servo valve, guarantee that unit is normally carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300749.1A CN108787760B (en) | 2017-04-28 | 2017-04-28 | A kind of planisher gap preset device and control method based on four servo valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710300749.1A CN108787760B (en) | 2017-04-28 | 2017-04-28 | A kind of planisher gap preset device and control method based on four servo valves |
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| Publication Number | Publication Date |
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| CN108787760A CN108787760A (en) | 2018-11-13 |
| CN108787760B true CN108787760B (en) | 2019-09-17 |
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| CN201710300749.1A Active CN108787760B (en) | 2017-04-28 | 2017-04-28 | A kind of planisher gap preset device and control method based on four servo valves |
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| CN113617855B (en) * | 2021-07-16 | 2023-02-17 | 太原科技大学 | Rolling mill control method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10263636A (en) * | 1997-03-28 | 1998-10-06 | Kawasaki Steel Corp | Automatic controller for plate thickness by hydraulic pressure in rolling mill |
| CN102248006A (en) * | 2011-05-31 | 2011-11-23 | 中冶南方工程技术有限公司 | Double-closed-loop hydraulic control method for roll bending and balancing of working roll |
| CN103372576A (en) * | 2012-04-13 | 2013-10-30 | 上海梅山钢铁股份有限公司 | Temper mill push-up cylinder roll gap control device and roll gap synchronous control method |
| CN203648996U (en) * | 2013-12-17 | 2014-06-18 | 北京七星华创电子股份有限公司 | Roller gap control device |
| CN103949482A (en) * | 2014-04-18 | 2014-07-30 | 南京梅山冶金发展有限公司 | Roller balance control method of planisher |
-
2017
- 2017-04-28 CN CN201710300749.1A patent/CN108787760B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10263636A (en) * | 1997-03-28 | 1998-10-06 | Kawasaki Steel Corp | Automatic controller for plate thickness by hydraulic pressure in rolling mill |
| CN102248006A (en) * | 2011-05-31 | 2011-11-23 | 中冶南方工程技术有限公司 | Double-closed-loop hydraulic control method for roll bending and balancing of working roll |
| CN103372576A (en) * | 2012-04-13 | 2013-10-30 | 上海梅山钢铁股份有限公司 | Temper mill push-up cylinder roll gap control device and roll gap synchronous control method |
| CN203648996U (en) * | 2013-12-17 | 2014-06-18 | 北京七星华创电子股份有限公司 | Roller gap control device |
| CN103949482A (en) * | 2014-04-18 | 2014-07-30 | 南京梅山冶金发展有限公司 | Roller balance control method of planisher |
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