CN102886385A - Method for determining relative movement-related degree of wear for roller - Google Patents
Method for determining relative movement-related degree of wear for roller Download PDFInfo
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- CN102886385A CN102886385A CN2012102570890A CN201210257089A CN102886385A CN 102886385 A CN102886385 A CN 102886385A CN 2012102570890 A CN2012102570890 A CN 2012102570890A CN 201210257089 A CN201210257089 A CN 201210257089A CN 102886385 A CN102886385 A CN 102886385A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B2267/00—Roll parameters
- B21B2267/24—Roll wear
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Abstract
The invention relates to a method for determining the relative movement-related degree of wear for a roller. In the period of rolling a rolled piece (2) in a roll stand (1), a process variable (P) that describes a rolling process is obtained. Based on the process variable, combined with a roll stand variable (W2) of the roll stand and a rolled piece variable (W1) that describes the rolled piece, the degree of wear (d) of the roller (3) of the roll stand (1) is determined in real time. The determined degree of wear includes a component (dA) of the relative movement-related degree of wear and is used for a rolled piece part segment (16) of the rolled piece. Based on the process variable, combined with a roll stand variable (W2) that describes the roll stand and a rolled piece variable (W1) that describes the rolled piece, each sliding area (13) is determined and is used for a rolled piece part segment, and in the sliding area, the rolled piece slides on the roller surface in the circumstance of moving relative to the roller. A corresponding component of the relative movement-related degree of wear is determined in the circumstance of regarding the length (L) of a corresponding sliding area.
Description
Technical field
The present invention relates to a kind of assay method, be used for mensuration for the wear intensity of the roll of the first mill stand of rolling rolling stock,
-wherein, in the first mill stand, during the rolling rolling stock, obtain the process variables of describing the operation of rolling,
-wherein, measure in real time the wear intensity of the roll of the first mill stand according to these process variables in conjunction with the mill stand variable of describing the first mill stand and the rolled piece variable of describing rolled piece,
-wherein, the wear intensity of mensuration comprises each wear intensity component relevant with relative motion, is used for the rolled piece section section of rolled piece.
The invention still further relates to a kind of computer program product, comprise machine code, this machine code can directly be processed by computer, and by this machine code of Computer Processing, so that this computer-implemented this assay method.
The invention still further relates to a kind of computer, it designs like this, i.e. this computer-implemented this assay method.
The invention still further relates to a kind of milling train, this milling train comprises that at least one is used for the mill stand of rolling rolling stock, and this milling train is equipped with this computer.
Background technology
When rolled metal, at roll wearing and tearing appear.Degree and various parameter correlation that wearing and tearing occur.For example, the degree of wearing and tearing depend on roll type (working roll, backing roll ... .), rolling type (cold rolling or hot rolling), the layout (first, second, third mill stand of milling train etc.) of roll in milling train in other words, using in the situation of reversible mill, depend on passage numbering, rolled piece material (steel, aluminium, copper ...), the material of roll (cast iron, steel casting, high-speed steel ... .) etc.
Wearing and tearing are influential to the quality of the rolling rolled piece that forms.Particularly must correct by corresponding location (in the rolled piece of plane equally also aspect the whole degree of profile peace) and consider wear intensity, and compensate as much as possible.In addition, must often change roll, and reface.
Only have when the roll that relates to be formed by mill stand dismounting and can be measured the time comprehensively, can directly measure roller wears.Relatively, in the ongoing operation of rolling, can not directly measure roller wears.Yet be known that the process variables that will detect the operation of rolling, and in real time roller wears counted by wear model.By wear model, according to rolling section of rolled piece, the change procedure etc. of roll-force is measured the wear intensity of corresponding roll during this section.Wear model for example is used for correspondingly correcting the location for other control system provides the wear intensity of mensuration.It is also known that, off line similarly to calculate.In this case, employed process variables for example can be the variable of expecting of measuring under model-aided.
Also extensively set up in the recent period following understanding, that is, wear intensity can have different wear intensity components, particularly thermal wear degree component and the wear intensity component relevant with relative motion.Thermal wear degree component is to heat up because the rolled piece period of contact of roll and heating is intermittent and roll is lowered the temperature between time of contact and caused basically.The wear intensity component relevant with relative motion is to produce because of the relative motion between rolled piece and the roll (lead and lag).It particularly can cause rolling wearing and tearing (abrasiveness wear intensity component).
For to the modeling of thermal wear degree component, known the whole bag of tricks.Purely exemplarily quote technical literature and " increase the service life of working roll by improvement roller cooling down operation " (" Increasing work-roll life by improved roll-cooling practice "), author P.G.Stevens etc., the American Iron and Steel Institute weekly, in January, 1971, first page to ten one page.One of the inventor early, not yet surpass disclosed August 27 2010 10 174 341.7(applying date of european patent application in the applying date of the present invention, title " is measured the method for the wear intensity of the roll that is used for rolling rolling stock ") a kind of particularly preferred method of operating for measuring thermal wear degree component described.
The present invention relates to the wear intensity component relevant with relative motion measured.Therefore, the below is only in mensuration and the consideration of edge extent discussion to thermal wear degree component.
When measuring location correction situation, may must also consider in the prior art the hot convexity (thermal crown) of roll.Measure and consider that hot convexity neither theme of the present invention.
Usually measure the corresponding wear intensity component relevant with relative motion according to following relational expression:
dA=c·Φ·a·l (1)
Wherein, dA represents the corresponding wear intensity component relevant with relative motion of expecting, c represents the constant coefficient of waste, Φ represents the pressure distribution in the roll seam, α represents (basically unique for the length of the contact area of rolled piece and roll) contact angle, and l represents the length of corresponding rolled piece section section.Coefficient of waste c is set suitably.It can be relevant with above-mentioned parameter.
Yet in practice, this method of operating can not reflect actual relationship fully.
Summary of the invention
The object of the present invention is to provide such possibility, namely can utilize model-aided ground to measure the wearing and tearing relevant with relative motion of roll in reliable mode.
This purpose is achieved by the assay method with the described feature of claim 1.Favourable design according to assay method of the present invention is the theme of dependent claims 2 to 13.
Design is according to the present invention, and design starts the assay method of described type in the following manner,
-measure each sliding area according to process variables in conjunction with the rolled piece variable of the mill stand variable of describing the first mill stand and description rolled piece, be used for rolled piece section section, in this sliding area, rolled piece with the situation of roll relative motion under slide at roller surface, and
-corresponding wear intensity the component relevant with relative motion of mensuration in the situation of the length of considering corresponding sliding area.
Therefore, the present invention is with the basis that is applied as of known conditions, namely, when rolling, there is a zone (attachment zone), wherein, rolled piece with in the situation of roll relative motion is not abutting in (adhesion) on the roll, and meanwhile, because so-called grinding length for the wearing and tearing relevant with relative motion, namely because roll because rolled piece is ultrafast and lag behind that segment length of relative motion occurs between roll and rolled piece.Possiblely be, set up a model, directly measure sliding area by it.Alternatively, measure (all) contact lengths and (absolute or relative) length of attachment zone, and then measure sliding area by contact length and attachment zone.Particularly in the prior art cicada can measure in addition the model of attachment zone.Purely exemplarily quote technical literature " slide and rolling friction during four roller station hot rollings on the impact of energy and force parameter " (" Effect of Sliding and Rolling Friction on the Energy-Force Parameters during Hot Rolling in Four-High Stands "), author E.A.Garber etc., in Russian metallurgy open (Metally), 2007, No. 6, the 484th to 491 page.This metal also uses in the category that the rolling program of being everlasting calculates.
In the prior art, only in order to measure roll-force, roll torque and leading amount (Voreilung) just use known model.In the geometric shape that utilizes the coefficient of friction between the flow performance of rolled piece, roll and the rolled piece, desirable reduction in pass, rolled piece and more situation like that, these models can be measured described variable.Therefore yet according to the present invention, also can in order to measure attachment zone and indirectly to measure sliding area and consider them, wherein, can realize measuring the wearing and tearing relevant with relative motion by sliding area.
What design in a kind of preferred design is, measures the corresponding wear intensity component relevant with relative motion according to following relational expression,
dA=c·l·L·Z
Wherein, dA represents that corresponding wear intensity component, the c relevant with relative motion represents that the pondage factor, the l that have nothing to do with process variables represent the length of corresponding rolled piece section section, and L represents the length of sliding area, and Z represents other actuation variable relevant with process variables.The wear model of very well results can be provided relatively simply, provide by this method of operating.
Possible in the simplest situation is that other actuation variable depends on the average pressure (that is to say the merchant of roll-force and contact area) in the rolling gap.This method often obtains acceptable even good result.Yet, when other actuation variable depends on (accurately) pressure distribution in the rolling gap, could obtain better result.For example can measure pressure distribution by average flow stress or by the flow curve (as the function of degree of deformation) of maximum.
Measure in the rolling gap pressure distribution and the structure attachment zone (according to assay method) amount of calculation very large.Therefore, preferably design is,
-measure pressure distribution in the rolling gap according to process variables in conjunction with mill stand variable and rolled piece variable in the first time during acquisition process variable,
The pressure distribution of-storing measurement,
-when acquisition process variable afterwards, check according to process variables whether these process variables variation has occured, and
-whether changing according to process variables, decision is to redeterminate pressure distribution in the rolling gap according to new process variables in conjunction with mill stand variable and rolled piece variable, perhaps still uses the pressure distribution of storing in the rolling gap.
Can be with the real-time capacity of relatively low computing capability realization according to assay method of the present invention by this method of operating.
As the replacement of pressure distribution situation in the rolling gap, another actuation variable can be relevant with the case hardness of roll.For example can (method that is equivalent to elaboration in the european patent application 10174341.7 early) measure the wear intensity component relevant with relative motion according to case hardness and the flow stress of rolled piece.Replacedly, can perhaps in the situation of the flow stress of additionally taking rolled piece into account, not only also measure the wear intensity component relevant with relative motion according to the case hardness of roll according to the pressure distribution in the rolling gap.Other method of operating also is possible.
If other actuation variable (also) depends on the case hardness of roll, so preferably measure in real time ceiling temperature according to process variables in conjunction with mill stand variable and rolled piece variable, the surface of roll can be warming up to this temperature with the rolled piece period of contact.In this case, preferably measure the case hardness of roll according to the ceiling temperature of measuring.
Preferably, when measuring sliding area, to consider rolling gap lubricity.
Possible is to use the wear intensity of measuring in the category that is the first mill stand mensuration regulated variable.Replaceable or additional possiblely is that wear intensity is considered that being used for measuring roll changes time point.Change time point as long as measured roll, so the mensuration of the wear intensity component of expection just can be perhaps connected with predicting for the wearing and tearing in future.This wearing and tearing prediction the applicant early, in advance August 27 2010 disclosed european patent application 10174297.1(applying date of the applying date of the present invention, title " can carry out the operation method of the milling train that is used for the rolling plane rolled piece of roller wears prediction ") have a detailed description.
Model for the milling train process can be made mistakes usually.Therefore, often adjust them by (recording) process variables that obtains.If in according to the category of assay method of the present invention, also will adjust, can use so various preferred methods of operating.
On the one hand can:
The roll-force that occurs when-process variables is included in rolling rolling stock,
-detection roll-force,
The roll-force of-mensuration expection in the situation of the flow curve of using rolled piece,
-directly or indirectly measure the corresponding wear intensity component relevant with relative motion according to flow curve, and
-according to the roll-force that detects and the roll-force trace flow moving curve of expection.
On the other hand can:
The roll-force that occurs when-process variables is included in rolling rolling stock and the leading amount that when rolling rolling stock, occurs,
-detect roll-force to measure with leading,
-in the situation with respect to the coefficient of friction of roll of the flow curve of using rolled piece and rolled piece, measure the roll-force of expection and the leading amount of expection,
-directly or indirectly according to the corresponding wear intensity component relevant with relative motion of flow curve and measuring friction coefficient, and
-according to the roll-force, the roll-force of expection, the leading amount of detection and leading amount trace flow moving curve and the coefficient of friction of expection that detect.
Preferably, in the above in the last-mentioned situation, not only according to roll-force trace flow moving curve.In addition, preferably, not only follow the tracks of coefficient of friction according to leading amount.Preferably more preferably not only also realize the tracking of flow curve according to leading amount according to roll-force.Preferably like this too for coefficient of friction.For trace flow moving curve and coefficient of friction, particularly can use a kind of nonlinear optimizer.Known many so suitable optimizers.Purely exemplarily quote technical literature " the adaptability rolling model that is used for cold continuous rolling " (Adaptive Rolling Model for a Cold Strip Tandem Mill), author Matthias Kurz etc., calendar year 2001 AISE.
In order to detect leading amount, need a kind ofly can detect exactly the device of speed of output one side of rolled piece by it.For example can settle ring-type lift (Schlingenheber) at the mill stand rear, its roller is positioned on the rolled piece.Very well near the time, the peripheral speed of ring-type lift is equivalent to the speed of output one side of rolled piece.In the situation of using the steel plate reversible mill, can also detect rolled piece length of (afterwards) before rolling with measuring technique, and measure in conjunction with the duration of roll pass and the circular path that lived through by roll during this period according to the length that detects and to measure in advance (hysteresis).
Under the prerequisite of using corresponding measurement mechanism, can in each mill stand, obtain roll-force.Yet possible is only just to implement obtaining leading amount in some mill stand.In this case for example can be in the mill stand that also obtains leading amount except roll-force (the first mill stand according to claim 11) not only the flow curve also coefficient of friction is realized following the tracks of.In other mill stand, wherein only obtained roll-force, but do not obtain leading amount, (the second mill stand according to claim 11) can be according to roll-force trace flow moving curve only.Yet possiblely be, according to be coefficient of friction that the first mill stand is followed the tracks of determine rolled piece with respect to the roll of the second mill stand, in the category of the wear intensity of the roll of measuring the second mill stand applied coefficient of friction.Particularly can receive the coefficient of friction of the first mill stand, perhaps utilize a factor to calculate in proportion and draw.
In many cases, rolled piece was at first walked the second mill stand, and then just walked the first mill stand.For example the second mill stand can be the breaking down frame of blooming mill, and the first mill stand can be the finishing stand of finishing mill.
Possiblely in addition be, after from mill stand, removing roll, measure this roll, so and measure the actual wear degree of this roll.In this case, can off line adjust wear model according to the expection wear intensity of measuring by wear model and the actual wear degree that records.
Also be achieved by a kind of computer program product that starts described type according to purpose of the present invention.The so described computer program product of design in this case, that is, by Computer Processing machine code so that this computer-implemented have according to assay method of the present invention assay method in steps.
This purpose also is achieved by a kind of computer, and this computer designs like this, i.e. this computer-implemented this assay method.
This purpose also is achieved by a kind of milling train that starts described type, and this milling train is equipped with this computer.
Description of drawings
Below, in conjunction with more the specification of the embodiment of elaboration clearer and set forth above-mentioned characteristic of the present invention, feature and advantage with being more readily understood with reference to the accompanying drawings, and the mode and the method that realize these characteristics, feature and advantage.Shown in it:
The schematically illustrated milling train of Fig. 1,
Fig. 2 illustrates flow chart,
The schematically illustrated rolling gap of Fig. 3,
Fig. 4 to 7 illustrates flow chart,
The schematically illustrated milling train of Fig. 8, and
Fig. 9 and 10 illustrates flow chart.
The specific embodiment
According to Fig. 1, a milling train has a plurality of mill stands 1.Replacedly, this milling train can only have a unique mill stand 1, for example in the situation of using reversible mill.In mill stand 1, rolled piece 2 is rolled.This rolled piece 2 is made of metal, and is for example made by copper, aluminium, brass or steel.In mill stand 1, replacedly can carry out cold rolling or hot rolling, wherein, generally be to carry out hot rolling in category of the present invention.
According to Fig. 1, mill stand 1 also has backing roll 4 except working roll 3.Therefore, rolled piece 2 is a kind of plane rolled pieces, that is to say band steel or steel plate.Replacedly, particularly for rolled piece 2 rolling unique outlook, shaft-like or tubulose, can save backing roll 4, namely only have working roll 3.
This milling train is equipped with computer 5.According to the displaying of Fig. 1, this computer 5 can be controlled milling train, namely is designed to control computer.Yet this is not mandatory necessary.Utilize 6 pairs of computers 5 of computer program to programme.Can for example pass through data medium 7 to computer 5 transport of computer programs 6, computer program 6 is stored on the data medium in machine-readable mode.Purely exemplarily in Fig. 1, data medium 7 is shown usb memory stick.Yet can not understand to limitation this diagram.
Computer program 6 comprises can be by the computer 5 direct machine codes 8 of processing.So that computer 5 is implemented a kind of assay method, more at large set forth the method below in conjunction with Fig. 2 by computer 5 handling machine codes 8.So, programme so that correspondingly construct computer 5 with computer program 6.
According to Fig. 2 (complementally referring to Fig. 1), computer 5 is specific roll 3 in step S1, and 4(is the top working roll 3 of intermediate mill support 1 among Fig. 1 for example) wear intensity d is set to initial value d0.For example can provide initial value d0 for computer 5 by operator 9 or by alternate manner.A kind of other possibility of initial value d0 that provides for example is, automatically from the grinding machine workshop of finish grinding related roll 3,4 to computer 5 transmission initial value d0.
In step S2, control computer 5 known rolled piece variable W1, this variable description be the rolled piece 2 that will be rolled.Rolled piece variable W1 for example comprises chemical composition, temperature and the geometric data of rolled piece 2.Particularly geometric data is with temperature is relevant with state in addition usually, and under this state, rolled piece 2 enters in the observed mill stand 1.In the situation of plane rolled piece 2, geometric data particularly can comprise width and the thickness of rolled piece.Can allow in the mode that is similar to initial value d0 computer 5 learn rolled piece variable W1.
In step S3, computer 5 known mill stand variable W2, this variable description mill stand 1 and roll 3,4 thereof.Mill stand variable W2 for example comprises the installation site of observed roll 3, namely such as in the mill stand 1 of first, second, third, etc. of the roller mill of multi-frame etc.In addition, mill stand variable W2 comprises the geometric data (width and diameter) of the static state of the type (working roll, backing roll, intermediate calender rolls etc.) of material (for example high-speed steel HSS), roll 3 of roll 3 and observed roll 3.Can allow computer 5 learn mill stand data W 2 in the mode that is similar to rolled piece data W 1.
In step S4, computer 5 acquisition process variable P during the rolling rolling stock 2 in observed mill stand 1.Process variables P describes is the operation of rolling in observed mill stand 1.For example can fully or partly detect these process variables by corresponding measuring transducer, and flow to computer 5.Particularly can be by corresponding dynamometer direct-detection rolling force F W.In a similar fashion, can detect by corresponding sensor the revolution nW of observed roll 3, thereby draw at once its peripheral speed in conjunction with (known) diameter of observed roll 3.Replacedly, can fully or partly measure process variables p by calculating.For example often can only be by calculating the leading amount of measuring.Yet, if obtained from mill stand 1 speed of the rolled piece 2 of output with measuring technique, so also can measure in advance with the relation of the peripheral speed of observed roll 3 by this speed and measure.In this case, it equally also is the variable that is measured as the basis.For example can be by detect the speed of the rolled piece 2 of output from mill stand 1 at the revolution nS that is positioned at the ring-type lift roller 10 on the rolled piece 2 at observed mill stand 1 rear.For example because rolling program is calculated, so the process variables P(that can know other lubricated between location, roll 3 and the rolled piece 2 of mill stand 1 for example).
In step S5, computer 5 is measured sliding area 13(s in conjunction with rolled piece variable W1 and mill stand variable W2 by rolling gap model 11 according to process variables P and is seen Fig. 3) and its length L.Sliding area 13 is equivalent to certain zone in the rolling gap of (see figure 3), in this zone, rolled piece 2 with the situation of roll 3 relative motions under slide at roller surface.Therefore, in sliding area 13, bar rolling speed in observed position just or (specifically in the zone that enters a side) less than the peripheral speed of roll 3 or the zone of output one side (specifically) peripheral speed greater than observed roll 3.Sliding area 13 is opposite with attachment zone 14, and in attachment zone, observed locational bar rolling speed equals the peripheral speed of observed roll 3.Sliding area 13 and attachment zone 14 consist of the contact area 15 of roll 3 together, in this zone, and roll 3 contact rolled pieces 2.The difference of (purely aspect drawing technique) in Fig. 3 of sliding area 13 and attachment zone 14 is, the speed of rolled piece 2 in the sliding area 13 that enters a side represents with small arrow, and the speed in the sliding area 13 of output one side represents with large arrow, meanwhile, represent the speed of rolled piece 2 in attachment zone 14 with medium sized arrow.When measuring sliding area 13, computer 5 preferably will be taken rolling gap lubricity in addition into account.
There are various possibilities in order to measure sliding area 13.At present preferably, (still there is not the difference between sliding area 13 and the attachment zone 14) at first in a known manner and measures contact area 15, then measure attachment zone 14 in same known mode and last (be absolute value or relative value according to the result who measures attachment zone 14) measures sliding area 13 according to following relational expression:
Sliding area=contact area-attachment zone or
Sliding area=contact area (1-attachment zone)
Perhaps can also be when measuring sliding area 13, attachment zone 14 and/or contact area 15 relatedly consider the effect of roll flattening-out.In order to measure contact area 15 and attachment zone 14, particularly can use rolling gap model 11.The corresponding rolling gap of cicada model 11.Pure schematically with reference to the described technical literature of the people's such as Garber beginning.
In step S6, computer 5 is measured the wear intensity component dA relevant with relative motion.Computer 5 is being considered in step S6 and is being measured the wear intensity component dA relevant with relative motion in the situation of the sliding area 13 of measuring among the step S5.Particularly the length L of the wear intensity component dA relevant with relative motion and sliding area 13 is proportional.
In an optional step S7, computer 5 is measured other wear intensity component, particularly thermal wear degree component dT.In order to measure the second wear intensity component, although contact area 15 is also very important usually.Yet, between sliding area 13 and attachment zone 14, generally needn't have any different.Particularly can measure thermal wear degree component dT according to the method that elaborates in the european patent application 10174341.7 of mentioning in beginning.
In step S8, computer 5 upgrades wear intensity d by the following method, that is, it adds the wear intensity component dA relevant with relative motion and other the wear intensity component dT that may also have on the wear intensity d that draws so far to.
In step S9, computer 5 uses the wear intensity d that measures.For example, if computer 5 according to the demonstration among Fig. 1 control milling train, it can be that observed mill stand 1 is measured the wear intensity d that uses mensuration in the category of regulated variable S so.Replacedly or as a supplement, computer 5 can be made comparisons the wear intensity d of mensuration and the greatest wear degree of permission, and may give the alarm to operator 9, must change observed roll 3 so that change time point at certain (measuring according to wear intensity d) roll.Other method also is possible.
In step S10, whether computer 5 inspection has finished rolling to rolled piece 2.If not, computer 5 turns back to step S4, thus it re-executes step S4 to S10.
From above embodiment, can find out, 5 in computer is that a rolled piece section section 16 is calculated the wear intensity component dA relevant with relative motion and may also be calculated other wear intensity component dT, and this rolled piece section section is rolled in observed mill stand 1 during correspondingly experiencing the circular flow that is made of step S4 to S10.Therefore, computer 5 is measured the wear intensity component dA relevant with relative motion according to following relational expression in step S6, as described in the step S6 of Fig. 2,
dA=c·l·L·Z
Wherein, c is the pondage factor irrelevant with process variables P, and l is the length of corresponding rolled piece section section 16, and Z is another actuation variable relevant with process variables P.
Can be implemented in various different ways the mensuration to other actuation variable Z.Set forth a kind of possible method of operating of measuring other actuation variable Z below in conjunction with Fig. 4.
According to Fig. 4, computer 5 in step S21 according to temperature and the chemical composition of process variables P, rolled piece variable W1 and mill stand variable W2, for example rolled piece 2, and in conjunction with geometric shape and the desirable reduction in pass of rolled piece 2, measure the pressure distribution in the rolling gap.Also can use rolling gap model 11 for this reason.For the professional and technical personnel, the method for designing of this rolling gap model 11 is known.
In step S22, computer 5 is measured the ceiling temperature of observed roll 3 according to process variables P, rolled piece variable W1 and mill stand variable W2, for example roller diameter, roll revolution, rolled piece geometric shape and rolled piece temperature.The surface that this ceiling temperature (at least basically) equals observed roll 3 is in that temperature that is promoted to rolled piece 2 period of contact.For the professional and technical personnel, corresponding roll model is known.In step S23, computer 5 is just measured the case hardness of observed roll 3 according to the ceiling temperature of roll 3.
In step S24, computer 5 is measured another actuation variable Z.For example computer 5 can be measured another actuation variable Z according to the design of step S24:
-according to the pressure distribution in the rolling gap, particularly with rolling gap in pressure distribution proportional,
-according to the case hardness of observed roll 3, for example in the following manner, that is, Z is less for another actuation variable, and case hardness is larger,
-according to other process variables (particularly rolling gap lubricity) or
-measure according to a kind of method of operating of combination.
In step S6, computer 5 is measured the wear intensity dA relevant with relative motion according to the following relational expression of having set forth:
dA=c·l·L·Z。
The amount of calculation of measuring the pressure distribution in the rolling gap is relatively large.Therefore, the method according to Fig. 4 preferably designs according to Fig. 5.
According to Fig. 5, computer checks in step S31 after acquisition process variable P whether these process variables P variation has occured.If this is the case, then computer 5 is measured the pressure distribution in the rolling gap in step 21, and in step S32 it is stored in memory 17(and sees Fig. 1) in.If process variables P does not change, computer 5 is transitioned into step S33 from step S31 so, and wherein, computer 5 reads the pressure distribution in the rolling gap from memory 17 in the situation that does not re-start mensuration.
Must guarantee that computer is transitioned into step S21 and S32 in the first time during execution of step S31.This for example can realize in the following manner that namely computer 5 is set to insignificant value, for example rolling force F W value of being set to 0 with process variables P (also before the First section 16 of rolled piece 2 is rolled) when initializing.
If in the situation of the flow stress of using rolled piece 2, realized the mensuration of the wear intensity component dA relevant with relative motion is so preferably upgraded coefficient of friction and/or flow stress often.If upgraded outside the assay method according to the present invention coefficient of friction and/or flow stress-for example in the category that rolling force model or rolling program calculate-possible be that these values are all received respectively according in the assay method of the present invention.Replacedly, can adjust for the assay method of measuring wear intensity d.Fig. 6 and 7 illustrates two kinds of preferred methods of operating.
According to Fig. 6, computer 5 is measured the pressure distribution in the rolling gap, the rolling force F W ' of expection and the leading amount v ' of expection according to process variables P, rolled piece variable W1 and mill stand variable W2 by rolling gap model 11 in step S41.
Process variables p also comprises rolling force F W and leading amount v usually.Rolling force F W normally obtains with measuring technique.Yet in the category of step S41, but do not use rolling force F W, i.e. actual roll-force.When execution in step S41, replacedly can utilize the flow curve of rolled piece 2, it not only participates in the mensuration to pressure distribution, yet participates in the mensuration to the rolling force F W ' that expects and the leading amount v ' of expection.Because the wear intensity component dA relevant with relative motion and the pressure distribution in the rolling gap are relevant, therefore measure the wear intensity component dA relevant with relative motion according to flow curve.In this case, this incidence relation is natural quality indirectly.Replacedly, can be under certain conditions direct incidence relation.
Therefore, the rolling force F W ' of the expection that can will be measured by its in step S42 according to Fig. 6 of computer 5 makes comparisons with actual rolling force F W.If there be (significantly deviation), computer 5 is transitioned into step S43 so.In step S43, computer 5 is according to the rolling force F W that detects and rolling force F W ' the trace flow moving curve of expection.
Fig. 7 is from Fig. 6 basically.But step S42 and S43 have been replaced with step S46 and S47.
In the design of Fig. 7, prerequisite is also to provide the measurand of leading amount v as reality except rolling force F W, namely is acquired.On the contrary, the leading amount v ' that measures expection in step S41 realizes in the situation of not utilizing actual leading amount v.Replacedly, be the leading amount v ' that in the flow curve of using rolled piece 2 and the situation with respect to the coefficient of friction of observed roll 3, measures expection.As described in, be what in the situation of also utilizing simultaneously flow curve, to realize the mensuration of the rolling force F W ' of expection.
Coefficient of friction-the same with flow curve-participation is to the mensuration of the wear intensity dA relevant with relative motion.Particularly coefficient of friction participates in the mensuration to sliding area 13.Therefore, in step S46-except the rolling force F W ' of rolling force F W and expection-also with the leading amount v ' of the leading amount v of reality and expection mutually relatively.Exist in the situation of obvious deviation, computer 5 is transitioned into step S47.In step S47, computer 5 is according to the rolling force F W ' of rolling force F W, expection, measure leading amount v ' trace flow moving curve and the coefficient of friction of v and expection in advance.Particularly can realize following the tracks of by nonlinear optimizer (not shown).
Method of operating according to Fig. 6 and 7 can make up mutually.Particularly possible is (see figure 8), for some mill stand 1 of the roller mill of multi-frame not only provides rolling force F W also to provide leading amount v as the process variables P that surveys, and rolling force F W is provided, does not provide leading amount v as measurand for 1 of other mill stand of this roller mill.According to shown in Figure 8, for example only obtain corresponding roll-force in forwardly the mill stand 1, and not only obtain in the mill stand 1 in the wings corresponding rolling force F W also-by the revolution nS of ring-type lift roller 10 and coiling machine 18, nH-obtains corresponding leading amount v.
In order can but not obtain the mill stand 1 of leading amount v and to follow the tracks of coefficient of friction for wherein only obtaining rolling force F W, for example can be according to Fig. 9 and 10 methods of operating of revising according to Fig. 6 and 7.Wherein, Fig. 9 is the modification to Fig. 7, and Figure 10 is the modification to Fig. 6.
According to Fig. 9, for one of them also obtains leading amount v as the mill stand 1 of measurand, in step S51, for providing, other mill stand 1 follows the tracks of the coefficient of friction that obtains.According to Figure 10, the coefficient of friction that is provided by mill stand 1 is provided in step S56, in this mill stand, do not obtain leading amount, and therefrom measure suitable coefficient of friction.For example can in step S56, utilize suitable factor to calculate in proportion coefficient of friction.
According to Fig. 8, rolled piece 2 was at first walked and was wherein only obtained rolling force F W, did not but obtain the mill stand 1 of leading amount v, and just walked afterwards and wherein not only obtain the mill stand 1 that rolling force F W also obtains leading amount v.Particularly the mill stand 1 in the place ahead can be the breaking down frame of blooming mill, and the mill stand 1 at rear can be the finishing stand of finishing mill.
The present invention has many advantages.Particularly the operations according to the instant invention method makes it possible to well and the expection wear intensity component dA relevant with relative motion reliably.In addition, particularly provide following possibility in conjunction with according to the principle of european patent application 10174341.7 thermal wear degree component dT being measured, namely can preset a unique wear model 12, it can be used in all mill stands 1 of the roller mill of multi-frame.Wherein, this wear model 12 can comprise rolling gap model 11 according to shown in Figure 1.Replacedly, rolling gap model 11 can be positioned in wear model 12 outsides, for example in the rolling program calculation element.In addition, with respect to change in process better susceptibility can be arranged, for example other variation in the coefficient of friction between the variation of rolling gap lubricity or rolled piece 2 and the observed roll 3.Analog rolling gap lubricity is on the impact of wear intensity d better.
Preferably when the rolled piece 2 of hot rolling plane, use the present invention.Yet equally also can when the rolled piece 2 of cold rolling plane, use the present invention.Not only when also having the rolled piece 2 of cold rolling other type, hot rolling also can use the present invention, for example the rolled piece 2 of shaft-like rolled piece 2 or unique outlook.In addition, the above do not touch upon the wear intensity component dA(relevant with relative motion that in the situation of plane rolled piece 2, measure at width and perhaps also have other wear intensity component dT) be with spatial resolution or without spatial resolution.Self-evident ground, these two kinds of methods of operating all are fine.
Although by more elaboration and description details of the present invention of preferred embodiment, the present invention is not limited to disclosed example, and can be derived by the professional and technical personnel other change programme in the situation of not leaving protection scope of the present invention.
Claims (16)
1. the assay method of the wear intensity (d) of the roll (3) of first mill stand (1) that is used for rolling rolling stock (2),
-wherein, in described the first mill stand (1), during the rolling described rolled piece (2), obtain the process variables (P) of describing the operation of rolling,
-wherein, measure in real time the described wear intensity (d) of the described roll (3) of described the first mill stand (1) in conjunction with the rolled piece variable (W1) of the mill stand variable (W2) of describing described the first mill stand (1) and the described rolled piece of description according to described process variables (P)
-wherein, the described wear intensity (d) of mensuration comprises each wear intensity component (dA) relevant with relative motion, is used for the rolled piece section section (16) of described rolled piece (2),
-wherein, measure each sliding area (13) according to described process variables (P) in conjunction with the described rolled piece variable (W1) of the described mill stand variable (W2) of describing described the first mill stand (1) and the described rolled piece of description, be used for described rolled piece section's section (16), in described sliding area, described rolled piece (2) with the situation of described roll (3) relative motion under slide at roller surface, and
-wherein, in the situation of the length (L) of considering corresponding described sliding area (13), measure the corresponding described wear intensity component (dA) relevant with relative motion.
2. assay method according to claim 1 is characterized in that, measures the corresponding described wear intensity component (dA) relevant with relative motion according to following relational expression,
dA＝c.l·L·Z
Wherein, dA represents that corresponding described wear intensity component, the c relevant with relative motion represents to represent with irrelevant pondage factor, the l of described process variables (P) length of corresponding described rolled piece section's section (16), L represents the length of described sliding area (13), and Z represents another actuation variable relevant with described process variables (P).
3. assay method according to claim 2 is characterized in that, described another actuation variable (Z) is relevant with pressure distribution in the rolling gap.
4. assay method according to claim 3 is characterized in that,
-when for the first time obtaining described process variables (P) according to described process variables (P) in conjunction with the pressure distribution in described mill stand variable (W2) and the described rolling gap of described rolled piece variable (W1) mensuration,
The pressure distribution of-storing measurement,
-when obtaining described process variables (P) afterwards, check according to described process variables (P) whether described process variables (P) variation has occured, and
-whether change according to described process variables (P), decision is to redeterminate pressure distribution in the described rolling gap according to new process variables (P) in conjunction with described mill stand variable (W2) and described rolled piece variable (W1), perhaps still uses the pressure distribution of storing in the described rolling gap.
5. according to claim 2,3 or 4 described assay methods is characterized in that, described another actuation variable (Z) is relevant with the case hardness of described roll (3).
6. assay method according to claim 5, it is characterized in that, measure in real time ceiling temperature according to described process variables (P) in conjunction with described mill stand variable (W2) and described rolled piece variable (W1), the surface of described roll (3) can be warming up to described ceiling temperature with described rolled piece (2) period of contact, and measures the case hardness of described roll (3) according to the described ceiling temperature of measuring.
7. according to each described assay method in the aforementioned claim, it is characterized in that, when measuring described sliding area (13), will consider rolling gap lubricity.
8. according to each described assay method in the aforementioned claim, it is characterized in that, in the category that is described the first mill stand (1) mensuration regulated variable (S), use the described wear intensity (d) of measuring, and/or described wear intensity is considered to be used for the mensuration roll change time point.
9. each described assay method in 8 according to claim 1 is characterized in that,
The roll-force (FW) that occurs when-described process variables (P) is included in rolling described rolled piece (2),
-detect described roll-force (FW),
The roll-force of-mensuration expection in the situation of the flow curve of using described rolled piece (2) (FW '),
-directly or indirectly measure the corresponding described wear intensity component (dA) relevant with relative motion according to described flow curve, and
-follow the tracks of described flow curve according to the roll-force (FW) that detects and the roll-force of expecting (FW ').
10. each described assay method in 8 according to claim 1 is characterized in that,
The leading amount of the roll-force (FW) that occurs when-described process variables (P) is included in rolling described rolled piece (2) and appearance when rolling described rolled piece (2) (v),
-detect described roll-force (FW) and described leading amount (v),
-in the situation with respect to the coefficient of friction of described roll (3) of the flow curve of using described rolled piece (2) and described rolled piece (2), measure the roll-force (FW ') of expection and the leading amount of expecting (v '),
-directly or indirectly according to the corresponding described wear intensity component (dA) relevant with relative motion of described flow curve and described measuring friction coefficient, and
-(v) follow the tracks of described flow curve and described coefficient of friction with the leading amount of described expection (v ') according to the leading amount of the roll-force of the roll-force (FW) of described detection, described expection (FW '), described detection.
11. assay method according to claim 10, it is characterized in that, roll (3) implementation of class for the second mill stand (1) is similar to assay method claimed in claim 9, and according to the coefficient of friction of following the tracks of for described the first mill stand (1) determine described rolled piece (2) with respect to the described roll (3) of described the second mill stand (1), in the category of the wear intensity (d) of the described roll (3) of measuring described the second mill stand (1) applied coefficient of friction.
12. assay method according to claim 11 is characterized in that, described rolled piece (2) was at first walked described the second mill stand (1), and then just walked described the first mill stand (1).
13. assay method according to claim 12 is characterized in that, described the second mill stand (1) is the breaking down frame of blooming mill, and described the first mill stand (1) is the finishing stand of finishing mill.
14. computer program product, comprise machine code (8), described machine code can directly be processed by computer (5), and process described machine code by described computer (5), so that described computer (5) is implemented a kind of assay method, described assay method have according to each described assay method in the aforementioned claim the institute in steps.
15. a computer is characterized in that described computer designs like this, i.e. the institute that described computer-implemented a kind of assay method, described assay method have according to claim 1 each described assay method in 13 in steps.
16. a milling train, described milling train comprise that at least one is used for the mill stand of rolling rolling stock (2) (1), it is characterized in that described milling train is equipped with computer according to claim 15 (5).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP11175028.7 | 2011-07-22 | ||
| EP11175028.7A EP2548665B1 (en) | 2011-07-22 | 2011-07-22 | Method for determining the wear on a roller dependent on relative movement |
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| CN102886385A true CN102886385A (en) | 2013-01-23 |
| CN102886385B CN102886385B (en) | 2015-04-08 |
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| CN201210257089.0A Active CN102886385B (en) | 2011-07-22 | 2012-07-23 | Method for determining relative movement-related degree of wear for roller |
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| Country | Link |
|---|---|
| EP (1) | EP2548665B1 (en) |
| CN (1) | CN102886385B (en) |
| PL (1) | PL2548665T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106694572A (en) * | 2017-02-28 | 2017-05-24 | 中冶华天工程技术有限公司 | Online rolling process adjusting system and method based on roller wear detection |
| CN110087787A (en) * | 2016-06-15 | 2019-08-02 | 阿维迪钢铁工程股份公司 | The mill rolls that can roll high milimeter number for ESP production line |
| CN114589205A (en) * | 2022-04-08 | 2022-06-07 | 燕山大学 | Method for determining online roll changing time node in strip rolling process |
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| JP6363388B2 (en) | 2014-05-01 | 2018-07-25 | ロレアル | Mist spray equipment |
| US9475526B2 (en) | 2014-08-23 | 2016-10-25 | Caterpillar Inc. | Track link having a wear sensing device |
| US9868482B2 (en) | 2014-10-29 | 2018-01-16 | Caterpillar Inc. | Track roller assembly with a wear measurement system |
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| US9371630B1 (en) | 2014-12-19 | 2016-06-21 | Caterpillar Inc. | Determination of undercarriage idler and roller wear based on final drive speed |
| EP3685930B1 (en) | 2019-01-28 | 2021-11-24 | Primetals Technologies Germany GmbH | Local varying of the roll gap in the area of the edges of a rolled strip |
| CN113316491B (en) | 2019-01-28 | 2023-08-11 | 首要金属科技德国有限责任公司 | Effective profile change of working surface of working roll during hot rolling of rolled piece into rolled strip in rolling stand |
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Also Published As
| Publication number | Publication date |
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| PL2548665T3 (en) | 2014-07-31 |
| CN102886385B (en) | 2015-04-08 |
| EP2548665B1 (en) | 2014-02-12 |
| EP2548665A1 (en) | 2013-01-23 |
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