CN113458153A - Loop control method and system for endless rolling of thin slab - Google Patents
Loop control method and system for endless rolling of thin slab Download PDFInfo
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- CN113458153A CN113458153A CN202110677038.2A CN202110677038A CN113458153A CN 113458153 A CN113458153 A CN 113458153A CN 202110677038 A CN202110677038 A CN 202110677038A CN 113458153 A CN113458153 A CN 113458153A
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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
- B21B37/48—Tension control; Compression control
- B21B37/50—Tension control; Compression control by looper control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a loop control method and a loop control system for endless rolling of a thin slab, which are used for controlling a finish rolling loop to rotate in a control mode different from that for controlling the rotation of a rough rolling loop so as to finish rolling the slab. And introducing a width control strategy on the basis of the above, performing loop control by taking the width deviation of the plate blank as a reference in a required range, detecting the actual width of the plate blank at a finish rolling outlet, and determining the width deviation of the actual width of the plate blank and the set width of the plate blank. The tension regulating quantity of the finish rolling loop is determined based on the width deviation, and the finish rolling is set to control the rotation of the finish rolling loop by utilizing the tension regulating quantity to adjust the finish rolling setting tension, so that the rotation of the finish rolling loop can be ensured to be accurately controlled, accidents such as steel piling are avoided, the product quality precision is improved, and the stable operation of a production line is ensured.
Description
Technical Field
The application relates to the technical field of endless rolling of thin slabs, in particular to a loop control method and system for endless rolling of thin slabs.
Background
The continuous casting and rolling of thin slabs are well known for energy conservation, consumption reduction and production cost reduction, wherein the endless rolling process technology is called as the third technical revolution of the steel industry and represents the highest level of hot rolled strip steel in the world nowadays. Compared with the traditional hot rolling, the endless rolling production line has the advantages of wide product coverage, wide market application prospect and large proportion of thin products, and the thin strip steel can replace cold rolling products with hot rolling products, namely the hot rolling replaces the cold rolling products. The head and tail cutting of the intermediate billet does not exist, and the yield is higher than that of the traditional hot rolling. Because the slab temperature is even, the finished product performance is more stable. The shape, the roll shape, the head and tail width and the thickness of the product are obviously higher than those of CSP products with the same specification. And the strip threading and tail throwing do not exist in the rolling process, so that the stable production of high-proportion thin-specification products can be realized. In the continuous production process, due to the changes of variable specifications, temperature and the like, the second flow fluctuation between the frames is more frequent than that of the traditional hot rolling, so the requirement on rolling stability is higher. In the endless production line of the sheet billet, a rolling area comprises 8 stand rolling mills, 3 rough rolling (a large-pressure rolling mill) and 5 finish rolling (a finishing rolling mill), and the production line adopts a 3+5 rolling mill configuration, wherein the distance between the rough rolling and the finish rolling is longer by 26.8m, and equipment such as hub shearing, induction heating, fine phosphorus removal and the like is configured.
The 7 loop devices are arranged between the 8 rolling stands, wherein the loops between the rough rolling stand and the finish rolling stand are arranged at the inlet of a first stand F1 for finish rolling, the specific arrangement position is shown in figure 1, and the loops are used for balancing the second flow rate between the stands and maintaining the tension to be stable.
For a plurality of loops of a thin slab continuous casting and rolling production line, how to formulate all loop control strategies is crucial, and if the loop control strategies are unreasonably formulated, the quality of strip steel is affected, so that the problems of unstable rolling, steel piling and the like in a serious production process are caused. For example: in the production process of a thin slab continuous casting and rolling production line of a certain factory, due to the fact that a loop control strategy is unreasonable, the problems of loop shaking, tension fluctuation in the specification changing process, strip steel narrowing, loop speed cascading reaching on-line and the like are caused, product quality and rolling stability are influenced, and huge loss is caused to the production line.
Disclosure of Invention
The invention provides a loop control method and system for continuous casting and rolling of thin slabs, aiming at the problem that the overall loop control strategy is imperfect and unreasonable in a continuous casting and rolling production line of the thin slabs, and aiming at improving the loop control capability, improving the product quality precision and ensuring the stable operation of the production line.
In order to solve the technical problem, the invention provides a loop control method for endless rolling of a thin slab, which comprises the following steps:
controlling a finish rolling loop to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop so as to finish rolling the plate blank;
detecting the actual width of the plate blank at the finish rolling outlet, and determining the width deviation between the actual width and the set width of the plate blank;
and determining the tension adjustment quantity of the finish rolling loop based on the width deviation, and adjusting the set tension of finish rolling by utilizing the tension adjustment quantity to control the rotation of the finish rolling loop so as to ensure that the width deviation of the plate blank is within a required range.
Preferably, before the finish rolling loop is controlled to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop, the method specifically comprises the following steps:
and controlling all the rough rolling loops to rotate in a control mode different from the control mode for controlling the rotation of the finish rolling loops so as to perform rough rolling on the plate blank.
Preferably, after controlling all of the rough rolling loopers to rotate in a control mode different from the control mode for controlling the rotation of the finish rolling loopers, the method further comprises:
aiming at each rough rolling loop, detecting a first actual angle of the rough rolling loop, and determining a first angle deviation between the first actual angle and a rough rolling set angle;
and determining a speed regulating quantity based on the first angle deviation to adjust the downstream rack speed of the rough rolling loop so as to control the first angle deviation of the rough rolling loop to be in a first reasonable deviation range in a first reasonable time.
Preferably, after controlling all of the rough rolling loopers to rotate in a control mode different from the control mode for controlling the rotation of the finish rolling loopers, the method further comprises:
for each rough rolling loop, detecting a first actual tension of the rough rolling loop, and determining a first tension deviation between the first actual tension and a rough rolling set tension;
and controlling the tension of the rough rolling loop by obtaining the output force of the rough rolling loop based on the first tension deviation, the first actual angle and the rough rolling set angle.
Preferably, after the finish rolling loop is controlled to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop, the method further comprises:
detecting a second actual angle of each finish rolling loop, and determining a second angle deviation between the second actual angle and a finish rolling set angle;
and determining a speed regulating quantity based on the second angle deviation to control the tension of the finish rolling loop so as to control the second angle deviation of the finish rolling loop to be in a second reasonable deviation range within a second reasonable time.
Preferably, after the finish rolling loop is controlled to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop, the method further comprises:
detecting a second actual tension of the finish rolling loop aiming at a No. 5 loop, a No. 6 loop and a No. 7 loop on a finish rolling production line, and determining a second tension deviation between the second actual tension and the finish rolling set tension;
and controlling the rotation of the finish rolling loop based on the output force of the finish rolling loop obtained by the second tension deviation, the second actual angle and the finish rolling set angle so as to control the second angle deviation of the finish rolling loop to be within the second reasonable deviation range within the second reasonable time.
Preferably, the controlling the rotation of the finish rolling loop by adjusting the finish rolling set tension using the tension adjustment amount includes:
and adjusting the finishing rolling set tension to a target set tension by using the tension adjustment amount for a 3# loop and a 4# loop on a finishing rolling production line.
Preferably, after the finish rolling set tension is adjusted by the tension adjustment amount to control the rotation of the finish rolling loop, the method further includes:
detecting a second actual tension of the finish rolling loop aiming at a 3# loop and a 4# loop on a finish rolling production line, and determining a second tension deviation between the second actual tension and a target set tension;
and controlling the rotation of the finish rolling loop by obtaining the output force of the finish rolling loop based on the second tension deviation, the second actual angle and the target set angle so as to control the second angle deviation of the finish rolling loop to be within the second reasonable deviation range within the second reasonable time.
The invention discloses a loop control system for headless rolling of a thin slab, which comprises:
a second mode controller for controlling the finish rolling loop to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop so as to finish roll the slab;
the detector is used for detecting the actual width of the plate blank at the finish rolling outlet;
the dynamic width controller is used for determining the width deviation between the dynamic width controller and the set width of the plate blank; determining the tension adjustment quantity of the finish rolling loop based on the width deviation;
and the second mode controller is used for adjusting the set tension of finish rolling by utilizing the tension adjustment quantity to control the rotation of the finish rolling loop and ensure that the width deviation of the plate blank is within a required range.
Preferably, the method comprises the following steps: a first mode controller for controlling the rotation of all the rough rolling loops in a control mode different from a control mode for controlling the rotation of the finish rolling loops to perform rough rolling on the slab.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention discloses a loop control method and a loop control system for endless rolling of a thin slab, which are used for controlling a finish rolling loop to rotate in a control mode different from that for controlling the rotation of a rough rolling loop so as to finish rolling the slab. And introducing a width control strategy on the basis of the above, performing loop control by taking the width deviation of the plate blank as a reference in a required range, detecting the actual width of the plate blank at a finish rolling outlet, and determining the width deviation of the actual width of the plate blank and the set width of the plate blank. The tension regulating quantity of the finish rolling loop is determined based on the width deviation, and the finish rolling is set to control the rotation of the finish rolling loop by utilizing the tension regulating quantity to adjust the finish rolling setting tension, so that the rotation of the finish rolling loop can be ensured to be accurately controlled, accidents such as steel piling are avoided, the product quality precision is improved, and the stable operation of a production line is ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows a schematic configuration of a loop according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating a loop control method for endless rolling of a thin slab according to an embodiment of the present invention;
fig. 3 shows a schematic view of a loop control system for endless rolling of thin slabs according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The embodiment of the invention provides a loop control method and a loop control system for the endless rolling of a thin slab, mainly aiming at controlling a rough rolling loop and a finish rolling loop of a production line for the endless rolling of the thin slab, wherein the loop arrangement of the production line is specifically shown in a figure 1 and is not repeated.
In the embodiment, two different control modes are adopted for the rough rolling loop and the finish rolling loop to respectively control so as to roll the plate blank. The control modes of the present embodiment include, but are not limited to, a normal Control (CONV) mode and an ILQ control (inverse linear quadratic) mode.
In this embodiment, the loops between the rough rolling 3 rough rolling stands H0, H1, and H2 are defined as a # 1 loop and a # 2 loop, and the control strategy of the # 1 loop and the # 2 loop controls the rotation of all rough rolling loops in a control mode different from the control strategy of the rotation of the finish rolling loops so as to perform rough rolling on the slab, specifically, the control is performed by a first mode controller. The angle is controlled by the speed in the control process, and then the angle is fed back and adjusted by adjusting the speed of the downstream rack, wherein the angle is controlled in a closed loop mode. The tension is open-loop control, and the loop output force is calculated by a tension-loop output force calculation formula to provide the tension.
In a specific implementation, the following steps are performed for each roughing loop: and detecting a first actual angle of the rough rolling loop. Wherein the actual angle of the loop can be detected by means of a loop encoder. And determining a first angle deviation of the set rough rolling angle. This calculation may be done by the first mode controller or may be done by a third party server and passed to the first mode controller. And after the first angle deviation is obtained, determining a speed regulating quantity based on the first angle deviation to regulate the speed of the downstream rack of the rough rolling loop so as to control the first angle deviation of the rough rolling loop to be in a first reasonable deviation range within a first reasonable time.
For the 1# loop and the 2# loop, the first actual angle theta of the loop is detected by a loop encoder1The rough rolling set angle is a two-stage set value
A first angular deviation of
The speed adjustment is input to a feedback controller (i.e. a first mode controller) and output to adjust the downstream stand speed of each loop, e.g. the speed adjustment of the 1# loop adjusts the speed of the H1 roughing stand. The angle-speed regulation is closed-loop control, so the regulation standard is to ensure the actual angle theta1Set angle is trailed to quick accuracy
I.e. the first angular deviation delta theta1Quickly (e.g. within 2 seconds) to [ -5%, 5%]Within the range.
The following steps are also required for each rough rolling loop: detecting a first actual tension of the rough rolling loop, and determining a first tension deviation between the first actual tension and a rough rolling set tension; and controlling the tension of the rough rolling loop by obtaining the output force of the rough rolling loop based on the first tension deviation, the first actual angle and the rough rolling set angle.
Setting the tension to a two-stage set value sigma* 1Root of Chinese characterObtaining the output force of the loop according to a calculation formula of the tension and the output force of the loop
Controlling the tension generated by the action of the movable sleeve on the strip steel.
The above is the control for rough rolling, and for finish rolling, with particular reference to fig. 2, the following steps are included:
and step 21, controlling the finish rolling loop to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop so as to finish roll the plate blank.
The loop control is flexibly performed by selecting different rolling modes according to two different rolling processes, the control capability of the loop can be improved, the product quality precision is improved, and the stable operation of a production line is ensured.
For the finish rolling, the loops before finish rolling 5 finish rolling stands F1, F2, F3, F4 and F5 are defined as 3# loop, 4# loop, 5# loop, 6# loop and 7# loop, all the loops adopt a ILQ control mode, ILQ is controlled to control tension through the speed of a downstream stand, angle is controlled through output force of the loops, and angle tension is doubly closed.
In particular, for each finishing loop, a second actual angle of the finishing loop is detected, wherein the actual angle of the loop can be detected with a loop encoder. And determining a second angle deviation between the finish rolling angle and the finish rolling set angle, wherein the calculation can be completed by a second mode controller, or the calculation can be transmitted to the second mode controller after being completed by a third party server. And after the second angle deviation is obtained, determining a speed regulating quantity based on the second angle deviation to control the tension of the finish rolling loop so as to control the second angle deviation of the finish rolling loop to be in a second reasonable deviation range within a second reasonable time.
Of course, as an alternative embodiment, for each finish rolling loop, detecting a second actual tension of the finish rolling loop, and determining a second tension deviation between the second actual tension and the set tension of finish rolling; and controlling the rotation of the finish rolling loop by obtaining the output force of the finish rolling loop based on the second tension deviation, the second actual angle and the finish rolling set angle so as to control the second angle deviation of the finish rolling loop to be within a second reasonable deviation range within a second reasonable time. Specifically, the finishing loop output force may be determined from the correspondence table based on the finishing loop output force, and the speed of the downstream stand of the finishing loop may be adjusted based on the finishing loop output force to control the rotation of the finishing loop.
Above mode is applicable to all finish rolling loopers, and for more accurate control to the looper, except adopting above-mentioned control mode, can also adopt dynamic width control function, sets for according to finish rolling export width dynamic adjustment tension, eliminates the width deviation through changing tension, guarantees slab width stable control when guaranteeing loop control promotion product quality.
And step 22, detecting the actual width of the plate blank at the finish rolling outlet.
Wherein, the actual width of the slab is detected by a detector.
And step 23, determining the width deviation between the blank and the set width of the plate blank.
The width deviation can be determined by a detector, a dynamic width controller or a third-party server, and is particularly determined according to actual conditions.
And 24, determining the tension adjustment quantity of the finish rolling loop based on the width deviation, and adjusting the set tension of finish rolling by using the tension adjustment quantity to control the rotation of the finish rolling loop so as to ensure that the width deviation of the plate blank is within the required range.
Further, the finish rolling set tension can be adjusted to the target set tension by the tension adjustment amount. After the rotation of the finish rolling loop is controlled by adjusting the finish rolling set tension by using the tension adjustment quantity, a second actual tension of the finish rolling loop can be detected, and a second tension deviation between the second actual tension and the target set tension is determined; and controlling the rotation of the finish rolling loop by obtaining the output force of the finish rolling loop based on the second tension deviation, the second actual angle and the target set angle so as to control the second angle deviation of the finish rolling loop to be within a second reasonable deviation range within a second reasonable time.
The dynamic width control function can be suitable for all finish rolling loops, and is preferably suitable for 3# loops and 4# loops. Therefore, as an example, it is applied to a thin slab continuous casting and rolling production line of a certain factory, and the embodiment is as follows: in production, the 1# and 2# loops adopt a conventional mode, the 3#, 4#, 5#, 6# and 7# loops adopt ILQ control, and the 3# and 4# loops adopt dynamic width control.
For the 1# loop and the 2# loop, the first actual angle theta of the loop is detected by a loop encoder1The rough rolling set angle is a two-stage set value theta1 *The first angular deviation is Delta theta1＝θ1-θ1 *And is input to a feedback controller (i.e., a first mode controller) and outputs a speed adjustment to adjust the downstream stand speed of each loop, e.g., the speed adjustment for the # 1 loop adjusts the speed of the H1 roughing stand. The angle-speed regulation is closed-loop control, so the regulation standard is to ensure the actual angle theta1Set angle theta is tracked fast and accurately1 *I.e. the first angular deviation delta theta1Quickly (e.g. within 2 seconds) to [ -5%, 5%]Within the range. Setting the tension to a two-stage set value sigma* 1Obtaining the output force of the loop according to a calculation formula of the tension force and the output force of the loop
Controlling the tension generated by the action of the movable sleeve on the strip steel.
Aiming at a 3# loop and a 4# loop on a finish rolling production line. Detecting a second actual angle theta of the loop by a loop encoder2The finish rolling set angle is a two-stage set value theta2 *The second angular deviation is Δ θ2＝θ2-θ2 *The output force is input into an ILQ controller to output the loop output force adjustment quantity to control the loop to rotate so as to ensure a second actual angle theta2Rapid and accurate tracking precision rolling set angle theta2 *I.e. the second angular deviation delta theta2Quickly (e.g. within 2 seconds) to [ -5%, 5%]Within the range. Detecting second actual tension sigma of loop through loop pressure head2Setting tension of finish rolling as two-stage set value sigma2 *The second tension deviation is Δ σ2＝σ2-σ2 *A second oneDeviation of tension Δ σ2Inputting the speed regulating quantity into a second mode controller to control the tension of the loop and ensure a second actual angle theta2Rapid and accurate tracking precision rolling set angle theta2 *I.e. the second angular deviation delta theta2Quickly (e.g. within 2 seconds) to [ -5%, 5%]Within the range. Of course, the reasonable ranges of the second angle deviation and the first angle deviation can be different, specifically, the 3# and 4# loops are controlled by adopting a dynamic width control function based on the actual standard, the actual width B of the plate blank is detected by a multifunctional detector at a finish rolling outlet, and the set width is a secondary set value B*The deviation of the slab width is delta B-B*The tension adjustment quantity is output and superposed to a secondary set value sigma2 *And in addition, the width deviation delta B of the plate blank is stably controlled on a reference value, and is generally 5-10 mm.
Aiming at a 5# loop, a 6# loop and a 7# loop on a finish rolling production line, a second actual angle theta of the loop is detected by a loop encoder2The finish rolling set angle is a two-stage set value theta2 *The second angular deviation is Δ θ2＝θ2-θ2 *The output force is input into an ILQ controller to output the loop output force adjustment quantity to control the loop to rotate so as to ensure a second actual angle theta2Rapid and accurate tracking precision rolling set angle theta2 *I.e. the second angular deviation delta theta2Quickly (e.g. within 2 seconds) to [ -5%, 5%]Within the range. Detecting second actual tension sigma of loop through loop pressure head2Setting tension of finish rolling as two-stage set value sigma2 *The second tension deviation is Δ σ2＝σ2-σ2 *Deviation of the second tension by Δ σ2Inputting the speed regulating quantity into a second mode controller to control the tension of the loop and ensure a second actual angle theta2Rapid and accurate tracking precision rolling set angle theta2 *I.e. the second angular deviation delta theta2Quickly (e.g. within 2 seconds) to [ -5%, 5%]Within the range.
The method of the invention sets a reasonable strategy for controlling a plurality of loops of a thin slab continuous casting and rolling production line, thereby improving the control capability of the loops, avoiding accidents such as steel running and steel piling, improving the quality precision of products and ensuring the stable operation of rolling.
Based on the same inventive concept, referring to fig. 3, the following embodiment describes a loop control system for endless rolling of thin slabs, comprising:
a first mode control 31 for controlling all the rough rolling loopers to rotate in a control mode different from the control mode for the finish rolling loopers to perform rough rolling on the slab. The specific loop control strategy in rough rolling has been described in detail in the above embodiments, and therefore will not be described herein.
And a second mode controller 32 for controlling the finish rolling looper to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling looper to finish roll the slab. The specific loop control strategy in finish rolling is described in detail in the above embodiments and will not be described herein.
Furthermore, on the basis of implementation of the control strategy, a dynamic width controller is introduced to dynamically adjust tension setting according to the width of a finish rolling outlet, and width deviation is eliminated by changing tension, so that stable control of the width of the plate blank is ensured while the quality of a product is improved by loop control.
Specifically, the detector 33 is configured to detect an actual width of the slab at the finish rolling outlet;
a dynamic width controller 34 for determining a width deviation from a set width of the slab; determining the tension adjustment quantity of the finish rolling loop based on the width deviation;
and the second mode controller 32 is used for adjusting the set tension of finish rolling by utilizing the tension adjustment quantity to control the rotation of the finish rolling loop and ensure that the width deviation of the plate blank is within the required range.
As an alternative embodiment, the dynamic width controller 34 may be adapted to control all finishing loops, preferably 3# and 4# loops. The specific implementation process has been described in detail above, and therefore is not described herein again.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components of a gateway, proxy server, system according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A method for loop control for endless rolling of thin slabs, characterized in that it comprises:
controlling a finish rolling loop to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop so as to finish rolling the plate blank;
detecting the actual width of the plate blank at the finish rolling outlet, and determining the width deviation between the actual width and the set width of the plate blank;
and determining the tension adjustment quantity of the finish rolling loop based on the width deviation, and adjusting the set tension of finish rolling by utilizing the tension adjustment quantity to control the rotation of the finish rolling loop so as to ensure that the width deviation of the plate blank is within a required range.
2. The method according to claim 1, wherein before controlling the finish rolling loop to rotate in a control mode different from the control mode for the rotation of the rough rolling loop, the method specifically comprises:
and controlling all the rough rolling loops to rotate in a control mode different from the control mode for controlling the rotation of the finish rolling loops so as to perform rough rolling on the plate blank.
3. The method of claim 1, wherein after controlling all of the rough rolling loop rotations in a different control mode than controlling the finish rolling loop rotations, the method further comprises:
aiming at each rough rolling loop, detecting a first actual angle of the rough rolling loop, and determining a first angle deviation between the first actual angle and a rough rolling set angle;
and determining a speed regulating quantity based on the first angle deviation to adjust the downstream rack speed of the rough rolling loop so as to control the first angle deviation of the rough rolling loop to be in a first reasonable deviation range in a first reasonable time.
4. The method of claim 3, wherein after controlling all of the rough rolling loop rotations in a different control mode than controlling the finish rolling loop rotations, the method further comprises:
for each rough rolling loop, detecting a first actual tension of the rough rolling loop, and determining a first tension deviation between the first actual tension and a rough rolling set tension;
and controlling the tension of the rough rolling loop by obtaining the output force of the rough rolling loop based on the first tension deviation, the first actual angle and the rough rolling set angle.
5. The method of claim 1, wherein after controlling the finish rolling loop to rotate in a control mode other than controlling the rotation of the rough rolling loop, the method further comprises:
detecting a second actual angle of each finish rolling loop, and determining a second angle deviation between the second actual angle and a finish rolling set angle;
and determining a speed regulating quantity based on the second angle deviation to control the tension of the finish rolling loop so as to control the second angle deviation of the finish rolling loop to be in a second reasonable deviation range within a second reasonable time.
6. The method of claim 5, wherein after controlling the finish rolling loop to rotate in a control mode other than controlling the rotation of the rough rolling loop, the method further comprises:
detecting a second actual tension of the finish rolling loop aiming at a No. 5 loop, a No. 6 loop and a No. 7 loop on a finish rolling production line, and determining a second tension deviation between the second actual tension and the finish rolling set tension;
and controlling the rotation of the finish rolling loop based on the output force of the finish rolling loop obtained by the second tension deviation, the second actual angle and the finish rolling set angle so as to control the second angle deviation of the finish rolling loop to be within the second reasonable deviation range within the second reasonable time.
7. The method of claim 5, wherein said adjusting a finish rolling set tension with said tension adjustment to control said finish rolling loop rotation comprises:
and adjusting the finishing rolling set tension to a target set tension by using the tension adjustment amount for a 3# loop and a 4# loop on a finishing rolling production line.
8. The method of claim 7, wherein after adjusting the finish rolling set tension using the tension adjustment to control the rotation of the finish rolling loop, the method further comprises:
detecting a second actual tension of the finish rolling loop aiming at a 3# loop and a 4# loop on a finish rolling production line, and determining a second tension deviation between the second actual tension and a target set tension;
and controlling the rotation of the finish rolling loop by obtaining the output force of the finish rolling loop based on the second tension deviation, the second actual angle and the target set angle so as to control the second angle deviation of the finish rolling loop to be within the second reasonable deviation range within the second reasonable time.
9. A loop control system for endless rolling of thin slabs, comprising:
a second mode controller for controlling the finish rolling loop to rotate in a control mode different from the control mode for controlling the rotation of the rough rolling loop so as to finish roll the slab;
the detector is used for detecting the actual width of the plate blank at the finish rolling outlet;
the dynamic width controller is used for determining the width deviation between the dynamic width controller and the set width of the plate blank; determining the tension adjustment quantity of the finish rolling loop based on the width deviation;
and the second mode controller is used for adjusting the set tension of finish rolling by utilizing the tension adjustment quantity to control the rotation of the finish rolling loop and ensure that the width deviation of the plate blank is within a required range.
10. The system of claim 9, comprising: a first mode controller for controlling the rotation of all the rough rolling loops in a control mode different from a control mode for controlling the rotation of the finish rolling loops to perform rough rolling on the slab.
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