CN102451836A - Rolling control device and rolling control method - Google Patents
Rolling control device and rolling control method Download PDFInfo
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- CN102451836A CN102451836A CN2011103332630A CN201110333263A CN102451836A CN 102451836 A CN102451836 A CN 102451836A CN 2011103332630 A CN2011103332630 A CN 2011103332630A CN 201110333263 A CN201110333263 A CN 201110333263A CN 102451836 A CN102451836 A CN 102451836A
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Abstract
The invention provides a rolling control device and a rolling control method, which can correct the thickness variation of an output side plate due to the retention length variation of a coolant. Continuous rolling pieces in a rolling mill are supplied to be between at least a pair of rollers for being rolled. Whether the retention amount of the coolant fed between rolling pieces and rollers, namely the retention amount of the rolling pieces before being fed to the rollers, is increased or decreased out of the specified threshold range is detected. Meanwhile, the thickness of the rolling pieces after being rolled is detected. Based on the retention detection result that whether the detected thickness is increased or decreased out of the specified threshold range within a specified time interval or not, the retention amount of the coolant is controlled.
Description
Technical field
The present invention relates to rolling control device and control method for rolling, particularly to the control that is rolled the liquid of supplying with on the part.
Background technology
In roll mill, the interval about utilizing between the operation roll is the speed of rolls of equipment before and after roll seam and this roll mill, and control puts on tension force and the rolling loading that is rolled part, is rolled operation thus.Be rolled part and contact with the work roll of roll mill, the thickness of slab that is rolled part through rolling processing changes.At this moment, slide being rolled between part and the work roll, thereby need lubricant.In addition, reduce generation processing heat, need cool off this thereby be rolled the part thickness of slab through rolling processing.With this lubricated and be cooled to purpose, in the input and output side of roll mill the cooling agent feedway is set, it is used to provide the liquid that has lubricated and cooling concurrently cooling agent just.
In the roll mill input side; For the cooling agent that provides from the cooling agent feedway; The cooling agent that provides from the downside that is rolled part directly drops on the roll mill bottom, and the cooling agent that provides from upside temporarily is trapped in and is rolled on the part, can drop on the roll mill bottom from the two ends that are rolled part thereafter.When rolling operation; Owing to be rolled part from the input side supply; Therefore being trapped in the cooling agent that is rolled part top can not flow to input side; For the quantity delivered of cooling agent and the discharge that flows to the roll mill bottom from the both side ends that is rolled part reach balanced, it is present in from being rolled part that part contacts with work roll to the position that stands away being rolled on part.
One of mode of supplying with as the cooling agent in the controlled rolling machine; Following method has been proposed; In order to keep coefficient of friction; So that suppress to produce vibration or slide etc. because of coefficient of friction reduces to produce because of coefficient of friction increases, the measurement coefficient of friction is with respect to the situation of change of mill speed, utilizes coefficient of friction to be accompanied by the speed of minimizing when rising turn to decline of the quantity delivered of cooling agent; Set the quantity delivered of the cooling agent in the medium velocity zone less than the quantity delivered (for example, with reference to patent documentation 1) in low velocity zone and the high speed range.
In addition, proposed following method, when carrying out high-speed rolling,, thereby detected the flow (for example, with reference to patent documentation 2) that the generation of vibrating increases cooling agent for the rolling bad or generation plate fracture that prevents in advance to cause because of vibration.
Patent documentation 1:JP spy opens the 2000-317510 communique
Patent documentation 2:JP spy opens the 2001-25812 communique
Since this be rolled the cooling agent that exists on the part amount (after; Be called " cooling agent hold-up ") be coolant flow and be rolled the equilibrium valve of part to the inflow velocity of roll mill; Therefore along with mill speed roughly becomes a certain amount of; But become the state of following time fluctuation because of being rolled part to the inflow state of roll mill being rolled length on the carrying direction that the scope that has cooling agent on the part particularly is being rolled part (below, be called " cooling agent delay length ").At this moment, at the operation roll of roll mill and be rolled the coolant flow that flows between the part and change the lubricating status change of rolling phenomenon.If the phenomenon change is then suppressed in lubricating status change, even if the input side thickness of slab is identical but the resulting outlet side thickness of slab of result after rolling is different thus.Therefore, the tension force change of outlet side thickness of slab and roll mill input side, outlet side might cause product precise decreasing and operating efficiency to descend.
Even if be detained also relatively milder and temporary transient the change under the maintainable situation of its state of back of its variable cycle of length variations at roll mill input side cooling agent; Even the change of outlet side thickness of slab takes place; Through using AGC (the Auto Gauge Control: thickness of slab control automatically), also can remove the change of outlet side thickness of slab that in roll mill, is provided with usually.But; For example when cooling agent is detained length cyclical movement; The change of outlet side thickness of slab then periodically takes place, even if thickness of slab control is moved for the thick change of control panel automatically, but owing to the lubricating status change as the reason that the change of outlet side thickness of slab takes place; Therefore be difficult to carry out Tracing Control, can present periodic outlet side thickness of slab change.
Utilize the method in the past adopted to be difficult to remove because of cooling agent and be detained the roll mill outlet side thickness of slab change that the change of length causes; This method is directly to be detected the outlet side thickness of slab of roll mill or used the plate speedometer to obtain the estimation thickness of slab with the constant mode of mass flow (mass flow) by the thickness of slab meter, and utilize to estimate thickness of slab change the operation roll shop building at a distance from or the plate speed of roll mill input side or outlet side.In addition; Even if cooling agent is detained length cyclical movement having taken place, also can eliminate the thickness of slab change through AGC sometimes in this state, therefore; Even the change of outlet side thickness of slab has taken place, be difficult to also judge whether this change causes because of cooling agent is detained the length change.
Summary of the invention
The present invention proposes in order to address the above problem, and its purpose is that in the control of roll mill modifying factor cooling agent is detained the change of length and the outlet side thickness of slab change that produces.
The hold-up control part of a mode of the present invention; Its controlled rolling machine; In this roll mill, be rolled between the roll that part supplies at least one pair of continuous, clamped by said roll it is rolled, said rolling control device is characterised in that; It comprises: hold-up change test section, detect the said change that is rolled hold-up on the part before the said hold-up that is rolled the liquid of supplying with between part and the said roll just is supplied between the said roll; Rolling back thickness of slab is obtained portion, based on the testing result of test section, obtains by said roll the said thickness that is rolled part after rolling; With the hold-up control part, be rolled detected said after rolling under the situation of thickness variation of part, control the hold-up of said liquid based on the testing result of said hold-up test section.
In addition; The control method for rolling of other type of the present invention; Its controlled rolling machine is rolled between the roll that part supplies at least one pair of continuous in this roll mill, is clamped by said roll it is rolled; Said control method for rolling is characterised in that it comprises the steps: to detect the change that is rolled the hold-up of the liquid of supplying with between part and the said roll said; Based on the testing result of test section, obtain by said roll the said thickness that is rolled part after rolling; Under the situation of the thickness variation that is rolled part detected said after rolling, control the hold-up of said liquid based on the testing result of said hold-up.
Through adopting the present invention, can the modifying factor cooling agent in the control of roll mill be detained the change of length and the outlet side thickness of slab change that takes place.
Description of drawings
Fig. 1 is the integrally-built figure of the related rolling device of expression embodiment of the present invention.
Fig. 2 is the example of the related as-rolled condition of expression embodiment of the present invention.
Fig. 3 is the related figure that is rolled the cooling agent delay on the part of expression embodiment of the present invention.
Fig. 4 is the figure of the change of the related cooling agent hold-up of expression embodiment of the present invention.
Fig. 5 is the example of the related as-rolled condition of expression embodiment of the present invention.
Fig. 6 is the structure chart of the related cold-rolling mill hold-up control of expression embodiment of the present invention.
Fig. 7 is the structure chart of the related cooling agent hold-up control of expression embodiment of the present invention.
Fig. 8 is the content of the related TR actual effect database of expression embodiment of the present invention.
Fig. 9 is the figure of the judgement situation of the related cooling agent hold-up change of expression embodiment of the present invention.
Figure 10 is the figure of the situation of the related cooling agent quantity delivered control of expression embodiment of the present invention.
Figure 11 is the related figure that is rolled the cooling agent delay on the part of expression embodiment of the present invention.
Figure 12 is the figure of the change of the related cooling agent hold-up of expression other embodiments of the present invention.
Among the figure:
1 roll mill
2 input side TR
3 outlet side TR
4 rolling mill speed control device
5 input side TR control device
6 outlet side TR control device
7 roll seam control device
8 input side tensometers
9 outlet side tensometers
10 mill speed setting devices
11 input side tension force setting devices
12 outlet side tension force setting devices
13 input side Tension Control
14 outlet side Tension Control
15 input side tension force current converters
16 outlet side tension force current converters
17 outlet side thickness of slab meters
18 outlet side board thickness control apparatus
19 rolling load cells
Camera is used in 20 image recognitions
50 refrigerant injection devices
51 coolant flow adjusting devices
52 coolant containers
53 cooling agent angular adjustment apparatus
55 route adjusting devices
60 cooling agents
61 cooling agents are detained
62 cooling agents are detained length
101 cooling agents are detained length change decision maker
102 cooling agents are detained the length change and suppress control device
103 setting data storehouses
The rolling actual effect database of 701 right TR
The rolling actual effect database of 702 left TR
703 outlet side thicknesss of slab change reason decision maker
The specific embodiment
Below, the embodiment that present invention will be described in detail with reference to the accompanying.In this embodiment, be that example describes in single chassis (single stand) roll mill, to use the present invention.Fig. 1 representes the structure of single chassis roll mill.The single chassis roll mill is with respect to the rolling direction of roll mill 1; Has input side TR (tension force spool (tension reel) brief note is TR) 2 at input side; Has outlet side TR3 at outlet side;,, input side TR2, is rolled thus after reeling being rolled of seeing off part is rolled by 1 pair of roll mill by the outlet side TR3 withdrawal of reeling.
Be provided with roll seam control device 7 and rolling mill speed control device 4 in the roll mill 1, this roll seam control device 7 is used for controlling the thickness of slab that is rolled part through changing the roll seam, and rolling mill speed control device 4 is used for the speed of controlled rolling machine 1.Input side TR2 and outlet side TR3 as this motor and the device that is used for drive motor, are provided with input side TR control device 5 and outlet side TR control device 6 by motor driven.
When rolling, to rolling mill speed control device 4 output speeds instructions, rolling mill speed control device 4 is implemented control and is made the constant airspeed of roll mill 1 by mill speed setting device 10.At the input side of roll mill 1, outlet side through applying tension force and stablize and implement rolling efficiently to being rolled part.Therefore, in input side tension force setting device 11 and outlet side tension force setting device 12, calculate needed for this reason tension force.
Based on input side that calculates by tension force setting device 11 and 12 and outlet side tension force setting value; At input side TR2 and outlet side TR3 via input side TR control device 5 and outlet side TR control device 6; Obtain by input side tension force current converter 15 and outlet side tension force current converter 16 and to be used for applying the current value of setting the required motor torque of tension force, and offer input side TR control device 5 and outlet side TR control device 6 to being rolled part.In input side TR control device 5 and outlet side TR control device 6, the control motor current makes it become the current value that is provided, and the motor torque through being offered input side TR2 and outlet side TR3 by motor current is to being rolled the tension force that part applies regulation.
Tension force current converter 15,16; Model based on TR mechanical system and TR control device comes computing to reach the current setting value (motor torque setting value) of tension force setting value; But owing in the control model, contain error; Therefore use by the input side tensometer 8 of input side that is arranged on roll mill 1 and outlet side and the actual tension of outlet side tensometer 9 measurements; Revise through input side Tension Control 13 and 14 pairs of tension force setting values of outlet side Tension Control, and offer tension force current converter 15,16, thus the current value that change is set input side TR control device 5 and outlet side TR control device 6.
In addition, because it is particularly important aspect product quality, to be rolled the thickness of slab of part, therefore implement thickness of slab control.Based on by outlet side thickness of slab meter 17 detected actual plate thicknesses, the roll seam of outlet side board thickness control apparatus 18 use roll seam control device 7 operation roll mills 1 is come the thickness of slab of controlled rolling machine 1 outlet side thus.
In Fig. 1, described situation be from input side TR2 to the left side to the right rolling (be designated hereinafter simply as rolling direction) of outlet side TR3 from figure, but in the single chassis roll mill, generally also can carry out contrary direction rolling (from right to left).Though determine according to product specification; The method of operating that is adopted generally is to being rolled the rolling repeatedly thickness of slab to obtain to hope of part; In the single chassis roll mill, implement from left to right the 1st time rolling, the part that is rolled that input side TR holds is reeled and to be recovered in outlet side TR; Rolling direction is changed to from right to left in rolling at the 2nd time, the part that is rolled that outlet side TR holds is reeled and is recovered in input side TR.Through this several times operation repeatedly, can obtain desirable product thickness of slab.
At the roll mill input side,, disposed the refrigerant injection device in order to ensure being rolled lubricating between part and the operation roll.Supply with cooling agent via coolant flow adjusting device 51 to refrigerant injection device 50 by coolant container 52.In addition, from the refrigerant injection angle of refrigerant injection device 50, can adjust by cooling agent angular adjustment apparatus 53 to the operation roll.In addition, also route adjusting device 55 can be set, be used to adjust and be rolled the inflow angle of part to the operation roll at the input side of roll mill.As hereinafter described, through this route adjusting device 55 is set, can adjusts cooling agent and be detained length.
The example of the roll mill outlet side thickness of slab change when Fig. 2 representes the change of cooling agent delay length generating period property.Than the input side thickness deviation of roll mill, in the outlet side thickness deviation, periodically produce bigger change, also can't remove the change of outlet side thickness of slab although used AGC.The figure that Fig. 2 (b) expression input side thickness of slab when having carried out being rolled part and carrying out next time rolling after rolling shown in Fig. 2 (a) and outlet side thickness of slab change.In Fig. 2 (b), the outlet side thickness of slab change among Fig. 2 (a) is the change of input side thickness of slab.
For Fig. 2 (a) and (b) both sides' rolling situation, though all used identical AGC, under the situation of (b), control through AGC, the change of outlet side thickness of slab does not almost take place.That is to say, when the input side thickness of slab change that has under the identical cycle,, also can't remove the outlet side thickness of slab change that causes because of the change of cooling agent delay length even if use the AGC that can suppress the change of outlet side thickness of slab.Therefore, when the outlet side thickness of slab change that causes because of the change of cooling agent delay length has taken place, be difficult to be removed through AGC.Therefore, need to suppress cooling agent and be detained length change itself.
As the essential factor of the outlet side thickness of slab in roll mill change, the coefficient of friction change that think the mechanical oscillation that comprise the input side thickness of slab change that is rolled part, the hardness change that is rolled part, the surface state change (coefficient of friction is inhomogeneous) that is rolled part, roll mill, causes because of the change of cooling agent hold-up etc.When the change of outlet side thickness of slab has taken place; Judge above-mentioned outlet side thickness of slab change essential factor which it meets; Be to be detained length by cooling agent to change under the situation about causing only, need to implement to be used to carry out cooling agent and be detained the control that the length change is controlled in its main cause.Therefore whether, in outlet side thickness of slab when change, taking place, need to detect this change and change and cause because of cooling agent is detained length.
Fig. 3 representes the roughly situation that cooling agent is detained.Although rolling making is rolled part through carrying out between the operation roll up and down, in order to be rolled the cooling of the lubricated and rolling heating between part and the operation roll this moment, by refrigerant injection device 50 to being rolled part and operation roll ejected coolant.For the cooling agent that is sprayed 60, afterwards, downwards the operation roll be rolled the cooling agent that sprays below the part and directly drop on the roll mill bottom.
On the other hand; To last operation roll be rolled the cooling agent that sprays above the part and fall by the plate width direction end that is rolled part; But according to the amount of coolant of being sprayed, be rolled on the part before falling by the plate end during can be detained 61 delay cooling agents as cooling agent.Since be rolled part with respect to roll mill at a high speed (a few 100m/ branch degree) move, therefore remain equilibrium length by amount of coolant of being detained and the translational speed that is rolled part being rolled the cooling agent that is detained on the part to the roll mill input side.Here it is, and cooling agent is detained length 62.
The expression cooling agent is detained the sketch map of length change among Fig. 4 (a)～(c).Because thinking, the change of cooling agent delay length determines by mill speed and amount of coolant that generally therefore, it roughly keeps constant length (stable state) if mill speed is constant.If this stable state is disintegrated, then cooling agent is detained length 61 changes.For example, cooling agent is detained the state of length from the state variation of Fig. 4 (a) to (b), is back to the state of (a) then again, so repeatedly.On the other hand, in this embodiment, the state from the state variation of Fig. 4 (a) to (b) or from this unidirectional variation of state variation to the state of (a) of Fig. 4 (b) does not think that cooling agent is detained the upset condition of length.That is to say that the upset condition that so-called cooling agent is detained is meant that increase that is rolled the cooling agent hold-up on the part in the specific time interval and minimizing are more than the threshold value of regulation.
At this, the afore mentioned rules time interval for example about several seconds relatively short during., for example, decide than the determining method during short as this based on mill speed as being rolled the time that part is handled upside down specific length.In addition, the operator also can arbitrary decision.Equally, the threshold value of afore mentioned rules is to confirm that plate presses the value of change, for example decides based on the ratio of pressing to Target Board etc. as the determining method of this value.
The reason that the change of cooling agent delay length takes place is that the balance of amount of coolant and mill speed is broken, but also considers " refrigerant injection angle " and " being rolled the inflow angle of part to roll mill " as its essential factor.In the roll mill that roll mill outlet side thickness of slab change shown in Figure 2 has taken place, under the situation of making identical product,, also there are the situation of generation outlet side thickness of slab change and the situation of not change although set same coolant flow to same speed.
Fig. 5 representes that cooling agent is detained the length change, thus the as-rolled condition of the situation of Fig. 2 (a) of generation outlet side thickness of slab change.When the outlet side thickness deviation takes place; Big based on the outlet side thickness deviation, input side plate velocity deviation is big, the big this relation of little, the rolling loading deviation of output side plate velocity deviation, the situation of (the becoming big thereby amount of coolant reduces coefficient of friction) of each the value representation lubricating status variation shown in Fig. 5.That is to say, because of cooling agent is detained length change coefficient of friction change thus, its as-rolled condition variation as a result.
Below, be detained the length change to judging cooling agent, and control the method that the length change suppresses the change of roll mill outlet side thickness of slab thus based on result of determination and describe.In the related rolling control of this embodiment; As shown in Figure 6; Be detained length change decision maker 101 detection cooling agents by cooling agent and be detained the length change, be detained length change control device 102 by cooling agent and control to improve roll mill outlet side thickness of slab precision with the mode of inhibition length change.
Fig. 7 is the detailed structure that the expression cooling agent is detained length change decision maker 101.Be detained in the length change decision maker 101 at cooling agent; As shown in Figure 7; Be based on outlet side thickness of slab meter 17, rolling load cell 19, the measured as-rolled condition of input and output side plate speed meter that roll mill is provided with, judge whether the reason of outlet side thickness of slab change is to cause because of cooling agent is detained the length change.That is to say, cooling agent be detained length change decision maker 101 as rolling back thickness of slab obtain portion, loading obtains portion and the hold-up change detects the performance function.
As stated; As the main cause of the outlet side thickness of slab of roll mill change, enumerated the mechanical oscillation of the input side thickness of slab change that is rolled part, the hardness change that is rolled part, the surface state change (coefficient of friction is inhomogeneous) that is rolled part, roll mill, be detained the coefficient of friction change that the length change causes because of cooling agent.When the coefficient of friction change that causes because of the change of cooling agent delay length takes place, generation as-rolled condition change as shown in Figure 5.In above-mentioned main cause, change can be detected by roll mill input side thickness of slab meter for the input side thickness of slab.Separated change brings influence to being rolled part as the roll shop building of operation up and down of roll mill in mechanical oscillation.In this case, big if rolling loading becomes, then the outlet side thickness deviation is less, is detained the thickness of slab change that the length change causes because this relation can be distinguished by cooling agent.
Surface treatment for being rolled part inhomogeneous (coefficient of friction change) just can be removed as long as enforcement is once rolling.In addition; Hardness for being rolled part is too inhomogeneous; But because at the same state of position reproduction that is rolled on the part; Therefore under the situation that is rolled action repeatedly, through with last time rolling action in as-rolled condition compare, can distinguish by cooling agent and be detained the outlet side thickness of slab change that the length change causes.
Therefore, in the related rolling control of this embodiment, be rolled action repeatedly, in rolling actual effect database, what make rolling actual effect and roll mill outlet side in the rolling action of each time is rolled the storage of getting up of location association on the part.In addition; Rolling actual effect has been shown among Fig. 7 has inputed to the situation in the rolling actual effect database 701 of right TR, this is that the right side is the situation of outlet side, when rolling direction is overturn; The left side is an outlet side, the rolling actual effect of rolling actual effect database 702 storages of left TR.
Under the situation of the example of Fig. 7, this rolling actual effect of rolling actual effect database 701 storages of right TR has been stored rolling actual effect last time in the rolling actual effect database 702 of left TR.Therefore, outlet side thickness of slab change reason decision maker 703 can be obtained this rolling actual effect successively, and can obtain rolling actual effect last time from the rolling actual effect database 702 of left TR.
After rolling actual effect that obtains this and rolling actual effect last time; Outlet side thickness of slab change reason decision maker 703 with this rolling actual effect and the rolling actual effect last time that is rolled same position place on the part relatively, judge at the same position that is rolled on the part whether same as-rolled condition change had last time also taken place.Both results have relatively afterwards only taken place in this as-rolled condition under the situation of as-rolled condition change shown in Figure 5, and outlet side thickness of slab change reason decision maker 703 is judged as the outlet side thickness of slab that has taken place because of the change of cooling agent delay length causes and changes.In last time rolling, that kind also as shown in Figure 5 has taken place to be judged as the inhomogeneous or surface state change of the hardness that is rolled part under the situation of change of as-rolled condition.
Be detained the structure of length change decision maker 101 through cooling agent shown in Figure 7, in the time of can relatively being rolled last time rolling at same position place on the part and this rolling actual effect when rolling.As stated, in Fig. 7, because rolling direction is direction from left to right, therefore left side TR is input side TR2, and right side TR is outlet side TR3.Because rolling direction is different, thus will be rolled part reel the TR that takes out and be supplied to the roll mill input side, reclaim the TR checker that is rolled part of the roll mill outlet side after rolling with reeling.Therefore, will be stored in the database from each TR turned position in a certain moment of rolling beginning back with corresponding to this rolling actual effect in advance, thereby the rolling actual effect during the rolling actual effect can be before rolling time the and this rolling compares.
The method for using of the explanation rolling actual effect database of TR (701 or 702) among Fig. 8.For outlet side TR, become a side who makes the rolling actual effect database of TR.The TR anglec of rotation during with rolling beginning is made as 0, will be write in the database by the detected TR anglec of rotation of the anglec of rotation detector of outlet side TR and rolling actual effect.Thereby become under the situation of input side TR in rolling direction upset,, through deducting, thereby calculate the current input side TR anglec of rotation by the detected TR anglec of rotation of the anglec of rotation detector of input side TR directly as the TR anglec of rotation.Based on the current input side TR anglec of rotation, the data on the identical database of the outlet side TR anglec of rotation in retrieval front rolling are taken out the current rolling actual effect that is rolled the part position.
For example; Position in the outlet side TR anglec of rotation (1), (2), (3); Rolling actual effect A, B, C are write under the situation in the rolling actual effect database of TR; When if the rolling direction upset becomes outlet side TR database, owing to deduct the TR anglec of rotation, therefore along with the order of the TR anglec of rotation according to C, B, A is removed.Being rolled in the part of reality,, implement rolling thus in the other direction because of rolling direction changes.
Fig. 9 representes the action summary of outlet side thickness of slab change reason decision maker 703.As shown in Figure 9; In the outlet side thickness of slab change reason decision maker 703; By this rolling actual effect when rolling of signal processing means processes and the rolling actual effect when last time rolling, use the waveform of its result to judge at the rolling loading of same position and the outlet side thickness of slab that are rolled on the part it is to have increased, do not change, still reduced.Then; Outlet side thickness of slab change reason decision maker 703 judges that according to the decision rule based on its result of determination the outlet side thickness of slab change when this is rolling is because which reason of " hardness that is rolled part is inhomogeneous ", " cooling agent is detained the length change ", " mechanical oscillation " takes place.
As shown in Figure 9; In this embodiment; Outlet side thickness of slab change reason decision maker 703 does not take place under the situation of rolling loading change and the change of outlet side thickness of slab when last time rolling, and being judged as does not have thickness of slab to change occurrence cause, just be rolled and do not have hardness inhomogeneous on the part in being rolled the material of part.In this case; It is under the unidirectional situation that the direction of change of outlet side thickness of slab and the change of outlet side thickness of slab and the direction of rolling loading change have taken place in this rolling action; Outlet side thickness of slab change reason decision maker is judged as the change of cooling agent delay length has taken place.On the other hand, be under the reciprocal situation in the direction of outlet side thickness of slab change and the direction of rolling loading change, outlet side thickness of slab change reason decision maker is judged as mechanical oscillation has taken place.
In addition, if the change of outlet side thickness of slab does not take place in this rolling action, because just problem did not take place originally, so 703 cancellations of outlet side thickness of slab change reason decision maker have or not the generation cooling agent to be detained the judgement of length change.In addition; The change of rolling loading change and outlet side thickness of slab has taken place when last time rolling; In this rolling action, taken place too under the situation of rolling loading change and outlet side thickness of slab change, it is main cause that outlet side thickness of slab change reason decision maker 703 is judged to be the height that is rolled part inhomogeneous.
In addition; Whether change of outlet side thickness of slab or this identification of rolling loading change have taken place; Same with the change of cooling agent hold-up in Fig. 4 (a) and (b); Be not to discern, but that kind as shown in Figure 9 is to the increase of value and the situation that minimizing is recurred are discerned at short notice according to the change of simple thickness of slab or loading.That is to say that outlet side thickness of slab change reason decision maker 703 occurs under the situation of peak value in thickness of slab and the time dependent curve of loading, identify change of outlet side thickness of slab or rolling loading change have taken place.
In other words, outlet side thickness of slab change reason decision maker 703, the increase of at interval interior at the appointed time outlet side thickness of slab and loading and minimizing detect change have taken place when the threshold value of regulation is above.That is to say; Outlet side thickness of slab change reason decision maker 703; Although the increase of outlet side thickness of slab and loading and reduce threshold value in regulation with interior situation under, or the increase of outlet side thickness of slab and loading and reduce more than the threshold value of regulation but continuing official hour at interval under the situation of above generation, then do not detect change.
Being detained the length change at cooling agent suppresses in the control device 102; Be detained length change decision maker 101 at cooling agent and be judged as and cooling agent has taken place be detained under the situation of length change, operate coolant flow, refrigerant injection angle in order to suppress this change, be rolled one of them of route angle of part.That is to say that cooling agent is detained the length change and suppresses control part as hold-up control part performance function.At this, the situation of description operation coolant flow.
Coolant flow is set to the function relevant with mill speed.If mill speed is very fast, then, therefore be set under the situation of accelerating mill speed because rolling caloric value also becomes greatly, make coolant flow also more.Based on deciding cooling agent to be detained length by the translational speed that is rolled part of mill speed decision and the balance of coolant flow; Therefore; Stable state is broken under the situation of this balance change, is difficult to judge because coolant flow is excessive so the length change has taken place still is to take place owing to too small with respect to mill speed.Therefore, in the coolant flow opereating specification of predesignating, change to find out with the mode of trial and error the coolant flow that cooling agent is detained the length change does not take place.
Figure 10 representes on top the example with respect to the coolant flow setting of mill speed.When mill speed is (A); When having taken place to be detained the outlet side thickness of slab change that the length change causes because of cooling agent; Cooling agent be detained the length change suppress control device 102 in predefined scope (for example, current setting value ± 10% in) implement the inhibition control that cooling agent is detained the length change.Shown in Figure 10 bottom, the change of cooling agent delay length suppresses control device 102 and changes coolant flow according to definite coolant flow change figures (time series figure) such as stability of considering operation in advance.During this period, cooling agent is detained length change decision maker 101, through keeping watch on the generation that cooling agent is detained the length change with above-mentioned same method.And, if being detained length, cooling agent changes the generation that decision maker 101 does not detect the change of cooling agent delay length, then cooling agent delay length change inhibition control device 102 stops to change coolant flow.
In the example of Figure 10, stop change constantly at (C).In this case, coolant flow change amount is (B).This is reflected on current mill speed-coolant flow setting curve; And conduct coolant flow setting curve after changing; Thus when implementing identical type rolling next time, can suppress to be detained the generation of the outlet side thickness of slab change that the length change causes in advance because of cooling agent.
In addition, cooling agent is detained the length change and suppresses control device 102, the route angle of adjustment refrigerant injection angle and roll mill.For the refrigerant injection angle, be purpose with the specification error of the spray angle removing when the machinery of roll mill is provided with or produce during maintenance of machine.For the route angle of roll mill, can adjust the angle when the roll mill inflow is rolled part.
Because is that master's roll time channel line angle degree changes what change roll mill with the operation roll, so need when roll is changed, adjust.Therefore, be detained under the situation of length change thereby cooling agent has taken place after the maintenance of machine refrigerant injection angle of implementing rolling equipment changes, the change of cooling agent delay length suppresses control device 102 and changes the refrigerant injection angle.In addition, thereby after the roll route angle of changing roll mill changes, be detained at cooling agent under the situation of length change, cooling agent is detained the length change and suppresses the route angle that control device 102 changes roll mill.In addition, when on the machinery of roll mill constitutes, refrigerant injection angle change device 53 not being set with route change device 55, cooling agent is detained length change inhibition control device 102 and changes coolant flow.In addition, thereby change under the situation of cooling agent delay length change in the product specification that is rolled part, cooling agent is detained length change inhibition control device 102 and changes coolant flow.
Like this, the related cooling agent of this embodiment is detained the control law that the length change suppresses control device 102 storages and corresponding each the control operation end of device situation, decides the control mode of each control operation end according to the device situation.
For refrigerant injection angle, coolant flow; Because atmospheric temperature and cooling agent viscosity are detained the influence that brings of length change to cooling agent; Therefore the relation with these is stored in the setting data storehouse 103 in advance; Under the situation that the same terms has taken place, from setting data storehouse 103, take out setting value and set, can prevent thus to be detained the outlet side thickness of slab change that the length change causes because of cooling agent.
Be detained the length change as cooling agent and suppress the control operation end that control device 102 is controlled; Be not limited to above-mentioned coolant flow, refrigerant injection angle, be rolled the route angle of part, can adopt and to control the various means that cooling agent is detained the length change.Can being rolled of roll mill input side be provided with above the part can be rolled the roll that part contacts, taking place when cooling agent is detained the length change roll contact with being rolled part, stop cooling agent, limit cooling agent thus and be detained length and change with inhibition.
As above illustrated; In the related rolling control of this embodiment; Carry out rolling action repeatedly, the as-rolled condition of the rolling loading in the rolling action at least more last time, outlet side thickness of slab etc. and this as-rolled condition detect the generation that cooling agent is detained the length change.Thus, can be detained the outlet side thickness of slab change that the length change causes by the modifying factor cooling agent.
In the example of Fig. 9, the decision rule that the height that is rolled part is inhomogeneous as being used to detect, cooling agent is detained length and mechanical oscillation has been explained three examples.This only is an example, and the related purport of this embodiment is, relatively detects the generation that cooling agent is detained the length change based on last time rolling actual effect and this rolling actual effect.Therefore, based on last time the rolling actual effect and the comparison of this rolling actual effect, various decision rules can be set.
In addition, in the example of Fig. 8, illustrated example is based on the anglec of rotation of TR and judges the position that is rolled on the part.This only is an example, so long as can judge that the information that is rolled the position on the part gets final product, the signal number of for example exporting along with the TR rotation etc. can use too.
In embodiment 1, illustrated example is under the situation that is rolled action repeatedly, to detect cooling agent based on the comparative result of last time as-rolled condition and this as-rolled condition to be detained the length change.In addition, can be detained the cooling agent that is rolled on the part shown in Figure 4 and carry out the dynamic image photography, through image handle detect the cooling agent hold-up through the time change.This mode has been shown among Figure 11.
Shown in the top of Figure 11, through image processing and detecting cooling agent be detained length through the time change situation under, image recognition be arranged on to take with camera 20 get into the operation roll position that is rolled part before.Thus, shown in the bottom of Figure 11, be rolled the prescribed limit on the part, the image information of rise time sequence with camera 20 shootings by image recognition.The outlet side thickness of slab change reason decision maker 703 that this embodiment is related; Obtain the seasonal effect in time series image information of such generation, that kind is rolled part and partly is detained this binary conversion treatment that part is " deceiving " for " in vain " cooling agent shown in Figure 11 bottom.And whether the area ratio of " deceiving " in monitoring picture part based on the change judgment of this ratio cooling agent has taken place and has been detained the length change.
Figure 12 (a)～(c) expression cooling agent is detained the example of length change and the detection mode that the cooling agent in this embodiment is detained the length change.Same with the explanation among Fig. 4 (a)～(c) of embodiment 1, cooling agent be detained length from the state variation of Figure 12 (a) to Figure 12 (b) state so that be back to the state of Figure 12 (a), so be the upset condition that cooling agent is detained length repeatedly.
When the change of cooling agent delay length has taken place; Shown in Figure 12 (c), the seasonal effect in time series image that generates with camera 20 by image recognition by the black part in the image after the binaryzation divide with respect to the ratio of entire area, just the ratio of cooling agent part is represented peak value.Detection has the method for the waveform of the peak value shown in Figure 12 (c), can adopt with embodiment 1 in the same method of rolling loading change and outlet side thickness of slab change.That is to say, outlet side thickness of slab change reason decision maker 703 under the ratio of above-mentioned area, more than the threshold value of regulation increase and reduce all be at the appointed time at interval under the situation of generation, can detect peak value shown in Figure 9.
Outlet side thickness of slab change reason decision maker 703 detects cooling agent by the way and is detained after the length change; Cooling agent is detained the length change and suppresses control device 102 through the method same with embodiment 1, the route angle of adjustment coolant flow, refrigerant injection angle and roll mill.Like this; In the related rolling control of this embodiment, cooling agent is detained carries out dynamic image and take or carry out continuous rest image and take the image information of rise time sequence; Thereby needn't be rolled action repeatedly, just can obtain the effect same with embodiment 1.
Claims (11)
1. rolling control device, its controlled rolling machine is rolled between the roll that part supplies at least one pair of continuous in this roll mill, is clamped by said roll it is rolled, and said rolling control device is characterised in that it comprises:
Hold-up change test section; Whether detection said before the said hold-up that is rolled the liquid of supplying with between part and the said roll just is supplied between the said roll is rolled hold-up on the part, increase and reduce with the scope more than the defined threshold at interval at the appointed time;
Rolling back thickness of slab is obtained portion, based on the testing result of test section, obtains by said roll the said thickness that is rolled part after rolling; With
Under the situation that the thickness that hold-up control part, detected said after rolling are rolled part increases and reduces with the scope more than the defined threshold at interval at the appointed time, control the hold-up of said liquid based on the testing result of said hold-up test section.
2. rolling control device according to claim 1 is characterized in that,
Said hold-up test section; Supplying with the repeatedly said same scope that is rolled part between to said roll carries out repeatedly under the rolling situation thus; Based on the repeated detection result of the said thickness in the said same scope that is rolled part, detect said hold-up and whether increase and reduce with the scope more than the defined threshold at interval at the appointed time.
3. rolling control device according to claim 2 is characterized in that,
Said rolling control device comprises that also loading obtains portion, and this loading obtains portion and obtains said roll based on the testing result of test section and put on the said loading that is rolled part,
Said hold-up test section; Supplying with the repeatedly said same scope that is rolled part between to said roll carries out repeatedly under the rolling situation thus; Based on the repeated detection result of the said loading in the said same scope that is rolled part, detect said hold-up and whether increase and reduce with the scope more than the defined threshold at interval at the appointed time.
4. rolling control device according to claim 3 is characterized in that,
Said hold-up test section; In the up-to-date testing result of said thickness and said loading; The said thickness in the specific time interval and the increase of said loading and be reduced to more than the defined threshold; In the said thickness in the said same scope that is rolled part and the testing result last time of said loading; The said thickness in the specific time interval and the increase of said loading and minimizing detect said hold-up and increase and reduce with the scope more than the defined threshold in the interval at the appointed time under the situation below the defined threshold.
5. rolling control device according to claim 1 is characterized in that,
Said hold-up test section; Based on to the said seasonal effect in time series view data of taking on the part and generating that is rolled before being supplied between the said roll, detect said hold-up and whether at the appointed time increase and reduce with the scope more than the defined threshold in the interval.
6. according to any described rolling control device of claim 1 to 5, it is characterized in that,
Said hold-up control part is controlled the hold-up of said liquid through the quantity delivered of controlling said liquid.
7. rolling control device according to claim 6 is characterized in that,
Said hold-up control part is controlled the quantity delivered of said liquid according to predetermined changing pattern, keeps the increase at interval at the appointed time of said hold-up and is reduced to the quantity delivered below the defined threshold, controls the hold-up of said liquid thus.
8. according to any described rolling control device of claim 1 to 7, it is characterized in that,
Spray angle when said hold-up control part sprays the said liquid of supply through control is controlled the hold-up of said liquid.
9. according to any described rolling control device of claim 1 to 8, it is characterized in that,
Said hold-up control part with the said said angle that is rolled part when being rolled part and being supplied between the said roll, is controlled the hold-up of said liquid through control.
10. according to any described rolling control device of claim 1 to 9, it is characterized in that,
Said hold-up control part is used to stop the prevention parts of said liquid to contact with said being rolled on the part through making said being rolled on the part, control the hold-up of said liquid thus.
11. a control method for rolling, its controlled rolling machine is rolled between the roll that part supplies at least one pair of continuous in this roll mill, is clamped by said roll it is rolled, and said control method for rolling is characterised in that it comprises the steps:
Whether detection said before the said hold-up that is rolled the liquid of supplying with between part and the said roll just is supplied between the said roll is rolled hold-up on the part, increase and reduce with the scope more than the defined threshold at interval at the appointed time;
Based on the testing result of test section, obtain by said roll the said thickness that is rolled part after rolling; With
Thickness that detected said after rolling is rolled part increase with the scope more than the defined threshold at interval at the appointed time and the situation of minimizing under, control the hold-up of said liquid based on the testing result of said hold-up.
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| JP2010243620A JP5597519B2 (en) | 2010-10-29 | 2010-10-29 | Rolling control device and rolling control method |
| JP2010-243620 | 2010-10-29 |
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| TWI490054B (en) * | 2012-09-25 | 2015-07-01 | China Steel Corp | Processing method and method for detecting quality of a surface of a processing machine |
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| CN102451836B (en) | 2014-11-05 |
| JP2012096242A (en) | 2012-05-24 |
| JP5597519B2 (en) | 2014-10-01 |
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