CN1846888A - Roll shape controlling means and control device - Google Patents

Abstract

The invention relates to a roller shape control method and relative controller, wherein the shape along plate width will be vibrated, caused by the interference between cooling medium control and bending machine; via dividing into several areas along width direction, each area is fixed with the ratio of cooling medium; based on the shape of roller, changing the ejection ratio, to keep the balance between left and right; therefore, the balance along plate width can be kept, to improve the shape accuracy.

Description

Rolling shape control method and rolling shape control apparatus

Technical field

The present invention relates to shape control method and shape control apparatus in the roller mill, particularly, relate to the shape control method and the shape control apparatus of the cooling material that has used cooling medium (roller roll oil) etc.

Background technology

In roller mill control, have all the time and use roller roll oil (cooling medium) or water to come the method for the shape of control roll rolled piece.For lubricated and chill roll rolled piece with working roll and towards rolled stock and working roll injection cooling medium.Cool off the water jet device of usefulness to the working roll injection water by the working roll that is set at the roller mill outlet side again.

For example, the spy opens clear 55-81010 communique and discloses such technology.

[patent documentation 1] spy opens clear 55-81010 communique

In order to control cooling medium, on by the width of rolled stock, arrange a plurality of cooling medium injection nozzles, and control opening of they with the cooling medium valve and close.That is, controlling opening of each cooling medium injection nozzle closes and makes the shape by rolled stock detected become target shape.Like this, under the situation of the cooling medium injection nozzle of selecting corresponding to the deviation that has detected to open by the shape of rolled stock and target shape, particularly, if the shape of rolled stock is to a certain degree near target shape, then open repeatedly/close in the left/right of cooling medium nozzle sometimes, play pendulum about the shape of rolled stock, thereby form accuracy descends.Therefore, there is quality of item to descend the problem of rolling fluctuation of service.

Summary of the invention

The object of the present invention is to provide a kind of decline that suppresses quality of item, can carry out shape control method and shape control apparatus in the roller mill of stable rolling.

In order to reach above-mentioned purpose, in the present invention, constitute in such a way: the zone that obtains at having divided the injection nozzle of arranging, corresponding to the deviation of the shape of target shape and detection, select to belong to the injection nozzle that becomes spray regime in each regional injection nozzle.Constitute in such a way: the spray distribution of control injection nozzle in each zone again.

Utilize the present invention, can further improve quality of item, can realize stable operation.

Description of drawings

Fig. 1 is the synoptic diagram of the total system that comprises shape control apparatus of roller mill;

Fig. 2 is the structure chart of cooling medium injection nozzle;

Fig. 3 is a structured flowchart;

Fig. 4 is the example that judging part was opened/closed to nozzle;

Fig. 5 is the figure of expression membership function;

Fig. 6 is the details drawing of Region Segmentation position operational part;

Fig. 7 is the details drawing that cooling medium is opened scale operation portion.

Symbol description

1 rolling frame

2 rolled stocks

3 SHAPE DETECTION rollers

4 SHAPE DETECTION devices

5 shape control apparatus

6 depressed position control device

8 cooling medium valves

9 cooling medium injection nozzles

51 cooling medium control parts

52 leveling control parts

53 amount of deflection control parts

54 form variations operational parts

55 target shape configuration parts

70 working roller bending machines

71 intermediate calender rolls bending machines

The specific embodiment

Below, use accompanying drawing that embodiments of the invention are described.

Fig. 1 represents to comprise the summary of the system of shape control apparatus 5.Based on the output of the SHAPE DETECTION roller 3 that is set at the roller mill outlet side, measure the plate shape of rolled stock 2 of the outlet side of rolling frame 1 by SHAPE DETECTION device 4.Utilize shape control apparatus 5 to carry out the shape control of roller mill, based on the SHAPE DETECTION result, the deviation of computing and the target shape of in target shape configuration part 55, setting in form variations operational part 54, based on this, the bending machine 70 of the deflection of amount of deflection (bending) control part 53 control change working rolls 11,71, leveling (leveling) control part 52 via depressed position control device 6 control working roll 11 about difference gap (leveling), cooling medium control part 51 is operated from cooling medium injection nozzle 9 by control cooling medium valve 8 and is ejected into cooling medium on the rolled stock 2.

Below, these control is described.The symmetrical part of bending machine control shape, leveling is revised the asymmetrical shape in the left and right sides.Cooling medium control to the part stretch out or local shape defect is revised.The opening/close of a plurality of cooling medium injection nozzles 9 that the decision of the method for operating of cooling medium is provided with on the plate width.If spray then working roll 11 cooling contractions of cooling medium to working roll 11.On the contrary, the working roll 11 that does not spray the part of cooling medium expands because of the caused heating of rolling.In the part that working roll 11 expands, rolled stock more unfertile land stretches, and stretches to be suppressed in the part that working roll 11 shrinks.Thereby the shape of rolled stock of having sprayed the part of cooling medium becomes expansion direction, and the shape of rolled stock of not spraying the part of cooling medium becomes direction of extension.In the control of the shape of roller mill, determine target shape in advance, shape control apparatus 5 operation drivers (actuator) make utilize SHAPE DETECTION device 4 and detected detection shape near target shape.The method of opening/closing of determining refrigerant injection nozzle 9 is various, but usually, sprays cooling medium to manying than target shape on the part of stretching, extension, stops the cooling medium injection to the part that does not stretch (expansions).Like this, in the shape control apparatus 5 that has used cooling medium, opening/closing of operation cooling medium injection nozzle 9 makes the plate shape of rolled stock approach target shape.

Spray cooling medium for lubricated and chill roll rolled piece 2 and working roll 11.In order to keep stable rolling, need to spray certain a certain amount of above cooling medium.At first, if realize above-mentioned situation, then open/close feasible ratio of spraying and about the plate width, equate as long as determine the cooling medium nozzle from notion.On the plate width, be divided into a plurality of zones, in each zone, determine in advance the number of nozzle opened, judge opening/closing of cooling medium nozzle.By in each zone, determining the ratio of the nozzle of opening and the nozzle of closing in advance, the balance of the cooling medium consumption on just can the holding plate width.Revise symmetrical shape defect by the roller amount of deflection, under the situation that produces the asymmetrical shape defect in the left and right sides, carry out the leveling operation.Control the shape defect of revising the part that to eliminate with roller amount of deflection or leveling by cooling medium.Like this,, just prevented mutual interference, thereby improved the precision of shape by sharing the effect of driver separately.

Fig. 3 represents the detailed process of cooling medium control.

Cooling medium control part 51 comprises that cooling medium split position operational part 514 and each zone open ratio configuration part 515.And, because be divided into three zones, so open/close judging part as nozzle, have that judging part 516 is opened/closed to right cooling medium nozzle, central cooling medium nozzle opens/close judging part 517 and judging part 518 is opened/closed to left cooling medium nozzle.The number of regions of but cutting apart is not limited to three, so long as get final product more than two.The target shape that form variations operational part 54 is relatively set by target shape configuration part 55, with the plate shape of the rolled stock of measuring by SHAPE DETECTION device 42, thereby calculate each driver correspond respectively to bending machine, leveling and then cooling medium as shown in Figure 2 ( parts 1,2 ... i ...) form variations △ ε i (at this, i represents 1,2 ... i ... below, under the situation that only is designated as i, the expression as △ ε 1, △ ε 2 ... △ ε i ... calculate).Cooling medium Region Segmentation position operational part 514 is opened/is closed judging part 516～518 outputs to the cooling medium nozzle and sets corresponding to the zone of plate width.Each zone is opened ratio configuration part 515 and is opened/close each regional cooling medium nozzle of judging part 516～518 output to the cooling medium nozzle and open ratio.Each regional cooling medium nozzle opens/closes that judging part 516～518 is set based on the zone and the ratio of opening is set and judged opening/closing of cooling medium nozzle.Cooling medium valve control part 513 based on nozzle open/out code operates the cooling medium valve.

Promptly, judging part 516～518 is opened/closed to the cooling medium nozzle, corresponding to the ratio (opening ratio) of opening the injection cooling medium of setting ratio configuration part 515 by each zone, export the instruction of opening, make the cooling medium injection nozzle 9 of opening this ratio based on the nozzle of the number of the above-mentioned ratio of opening.Cooling medium valve control part 513 is opened/out code based on the nozzle of being opened/closed judging part 516～518 output by the cooling medium nozzle, operates opening/closing of cooling medium valve 8, thereby sprays or stop cooling medium.

Promptly, cooling medium nozzle is as shown in Figure 4 opened/is closed and judges like that, and classification mechanism A5111 is classified as ANBi (negative big (negative big)), ANSi (negative little (negative small)), AZOi (zero), APBi (honest (positive big)), APSi (just little (positivesmall)) according to the membership function of Fig. 5.Similarly, classification mechanism B5112 and classification mechanism C5113 obtain BNBi, BNSi, BZOi, BPBi, BPSi, CNBi, CNSi, CZOi, CPBi, CPSi.Then according to pre-determined rule base 5116, fuzzy reasoning mechanism 5114 obtains: classification results NBi, the NSi, ZOi, PBi, the PSi that are used to obtain the injection degree α i of parts separately.Injection degree arithmetical organ 5115 utilizes formula 1 to obtain the injection degree α i of the nozzle of i parts.Thereby nozzle is opened/is closed decision mechanism 5161,5171,5181 and multiply by cooling medium open ratio on effective number of nozzle, comes computing to open number of nozzle, and according to the big selected nozzle that sprays of order of the degree of injection α i.

Fig. 4 represents that the cooling medium nozzle opens/close judging part 516～518.In the present embodiment, use the form variations data of plate width integral body, and obtain certainty factor APB (honest), APS (just little), ANB (negative big), ANS (negative little), the AZO (zero) of each jet element by classification mechanism A with membership function as shown in Figure 5.In classification mechanism B, C, obtain certainty factor similarly.Certainty factor NBi, NSi, ZOi, PSi, PBi the parts of cooling medium i are obtained from these certainty factors in rule-based storehouse 5116.

Then, in spraying degree arithmetical organ 5115, as shown in Equation 1, utilize obtain weighting by coefficient ρ the function of center of gravity, obtain the injection degree α i of i parts.

[formula 1]

$\mathrm{\αi}=\frac{{\mathrm{\ρ}}_{\mathrm{NB}}{\mathrm{NB}}_i+{\mathrm{\ρ}}_{\mathrm{NS}}{\mathrm{NS}}_i+{\mathrm{\ρ}}_{\mathrm{ZO}}{\mathrm{ZO}}_i+{\mathrm{\ρ}}_{\mathrm{PB}}{\mathrm{PB}}_i+{\mathrm{\ρ}}_{\mathrm{PS}}{\mathrm{PS}}_i}{\mathrm{\Σ}({\mathrm{NB}}_i+{\mathrm{NS}}_i+{\mathrm{ZO}}_i+{\mathrm{PB}}_i+{\mathrm{PS}}_i)}$

In the present invention, respectively on the right side, central authorities, left field are provided with and open/ close decision mechanism 5161,5171,5181, judge opening/closing of nozzle in each regional minimax parts scope of setting by Region Segmentation position operational part.From spraying the bigger parts of value of degree α i, export the instruction of opening nozzle corresponding to open the ratio of setting the ratio configuration part of opening (rR, rC, rL) by each zone successively.

Fig. 6 shows the example of cooling medium Region Segmentation position operational part 514.Cooling medium Region Segmentation position operational part 514 is selected each regional minimax parts No. according to the plate width in step 602,604,606,608.At first, carry out the bound inspection of plate width data, after step 610,612,614, the database 5141 with corresponding each regional minimax parts No. of plate width range Wmin (j), Wmax (j) (N1 (j)～N6 (j)) has been stored in reference, selects each the regional minimax parts No. corresponding to this mechanical width.This is an embodiment, so long as the plate width by rolled stock, plate thickness, steel grade class etc. and uniquely determine that each regional method gets final product.

Fig. 7 represents that cooling medium opens the structure of ratio initial setting section 515.In the present embodiment, cooling medium is opened ratio initial setting section 515 in step 702,704,706,708, judge that the plate width is whether in upper limit lower range, and then in step 710,712,714, when each rolling for plate width range Wmin (j), Wmax (j) begins, carry out the initial setting that cooling medium is opened ratio, in rolling, use form variations △ ε i to change the ratio of opening.Like this, initial setting is retrieved as opening the ratio initial value and stored (RR (j), RC (j), RL (j)) corresponding to each zone of plate width with reference to the database 5151 of each plate width.In rolling, utilize formula 2 to obtain each regional form variations mean value (ε R, ε C, ε L).

[formula 2]

$\mathrm{\&epsiv;R}=\frac{\underset{i=n1}{\overset{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A20061007356400121.png"\; state="\{\{state\}\}">n</figure-callout>}2}{\mathrm{\&Sigma;}}}{\mathrm{\&epsiv;}}_i}{n2-\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="A20061007356400161.png"\; state="\{\{state\}\}">n</figure-callout>}1+1},\mathrm{\&epsiv;C}=\frac{\underset{i=n3}{\overset{n4}{\mathrm{\&Sigma;}}}{\mathrm{\&epsiv;}}_i}{n4-n3+1},\mathrm{\&epsiv;L}=\frac{\underset{i=n5}{\overset{n6}{\mathrm{\&Sigma;}}}{\mathrm{\&epsiv;}}_i}{n6-n5+1}$

As shown in Equation 3, obtain and open ratio change amount △ rR, △ rC, △ rL again.

[formula 3]

$\mathrm{\&Delta;rR}=G_{1P}(\mathrm{\&epsiv;R}-\mathrm{\&epsiv;L})+G_{1I}\&Integral;(\mathrm{\&epsiv;R}-\mathrm{\&epsiv;L})\mathrm{dt}+G_{2P}\{\frac{1}{2}(\mathrm{\&epsiv;R}+\mathrm{\&epsiv;L})-\mathrm{\&epsiv;C}\}$

$+G_{2I}\&Integral;\{\frac{1}{2}(\mathrm{\&epsiv;R}+\mathrm{\&epsiv;L})-\mathrm{\&epsiv;C}\}\mathrm{dt}$

$\mathrm{\&Delta;rL}=G_{1P}(\mathrm{\&epsiv;L}-\mathrm{\&epsiv;R})+G_{1I}\&Integral;(\mathrm{\&epsiv;L}-\mathrm{\&epsiv;R})\mathrm{dt}+G_{2P}\{\frac{1}{2}(\mathrm{\&epsiv;R}+\mathrm{\&epsiv;L})-\mathrm{\&epsiv;C}\}$

$+G_{2I}\&Integral;\{\frac{1}{2}(\mathrm{\&epsiv;R}+\mathrm{\&epsiv;L})-\mathrm{\&epsiv;C}\}\mathrm{dt}$

$\mathrm{\&Delta;rC}=G_{2P}+\{\mathrm{\&epsiv;C}-\frac{1}{2}(\mathrm{\&epsiv;R}+\mathrm{\&epsiv;L})\}+G_{2I}\&Integral;\{\mathrm{\&epsiv;C}-\frac{1}{2}(\mathrm{\&epsiv;R}+\mathrm{\&epsiv;L})\}\mathrm{dt}$

At this, G represents every weight (gain).And then, as shown in Equation 4, on initial set value, add the change amount, thereby determine the ratio of opening in each zone.

[formula 4]

rR＝rRO+△rR

rL＝rLO+△rL

rC＝rCO+△rC

This is opened ratio and determines that method is an example, for example, also can judge the increase and decrease of the ratio of opening by fuzzy reasoning.Also can change the ratio of opening based on the pattern of having set in advance again.

In the present embodiment, having illustrated becomes right side, central authorities, left side with Region Segmentation, but also can be partitioned into driving side, central authorities, non-drive side.

Claims (12)

1. the shape control method in the roller mill, by being sprayed cooling material the injection nozzle on the width of rolled stock and come the cooling operations roller from being arranged in, control is by the shape of rolled stock, wherein,

At the zone of the injection nozzle of having divided described arrangement,, select to belong to the injection nozzle that becomes spray regime in each regional injection nozzle corresponding to the deviation of target shape with the shape that is detected.

2. the shape control method in the roller mill as claimed in claim 1, wherein,

Come the zoning corresponding to the plate width.

3. the shape control method in the roller mill as claimed in claim 1, wherein,

By corresponding to the deviation of target shape with the shape that is detected, determine to belong to the ratio of the injection nozzle that becomes spray regime in the injection nozzle in described zone, be selected to the injection nozzle of spray regime with this.

4. the shape control method in the roller mill as claimed in claim 2, wherein,

Obtain priority at each injection nozzle, from the high injection nozzle of priority, be selected to the injection nozzle of described spray regime.

5. the shape control method in the roller mill as claimed in claim 4, wherein,

Obtain corresponding to each injection nozzle and deviation target shape, thereby be selected to the injection nozzle of described spray regime corresponding to this deviation.

6. the shape control method in the roller mill as claimed in claim 5, wherein,

Use fuzzy theory to be selected to the injection nozzle of described spray regime corresponding to this deviation.

7. the shape control method in the roller mill as claimed in claim 3, wherein,

Ratio to the injection nozzle that becomes described spray regime changes.

8. the shape control method in the roller mill as claimed in claim 7, wherein,

Plate width, plate thickness or steel grade class corresponding to rolled stock are come the described ratio of initial setting, and then change described ratio.

9. the shape control method in the roller mill as claimed in claim 1, wherein,

Described cooling material is the lubricated cooling medium of double as rolling.

10. the shape control method in the roller mill, by being sprayed cooling material the injection nozzle on the width of rolled stock and come the cooling operations roller from being arranged in, control is by the shape of rolled stock, wherein,

At the zone of the injection nozzle of having divided described arrangement, the spray distribution of control injection nozzle in each zone.

11. the shape control apparatus of a roller mill is controlled from being arranged in the cooling material of the cooling operations roller that is sprayed the injection nozzle on the width of rolled stock, it is characterized in that,

Mechanism with deviation of shape that computing is detected and target shape; And the mechanism of selecting to belong to the injection nozzle that becomes spray regime in each regional injection nozzle at the zone of having divided the described injection nozzle that is arranged, corresponding to described deviation.

12. the shape control apparatus of a roller mill is controlled from being arranged in the cooling material of the cooling operations roller that is sprayed the injection nozzle on the width of rolled stock, it is characterized in that,

Have: the mechanism that in each zone, controls the spray distribution of injection nozzle at the zone of the injection nozzle of having divided described arrangement.

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