CN102886385B - 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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- CN102886385B CN102886385B CN201210257089.0A CN201210257089A CN102886385B CN 102886385 B CN102886385 B CN 102886385B CN 201210257089 A CN201210257089 A CN 201210257089A CN 102886385 B CN102886385 B CN 102886385B
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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
- B21B—ROLLING OF METAL
- 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, for measuring the wear intensity of the roll of the first mill stand for rolling rolling stock,
-wherein, in the first mill stand during rolling rolling stock, obtain the process variable describing the operation of rolling,
-wherein, according to these process variables in conjunction with the mill stand variable of description first mill stand with describe the wear intensity that the rolled piece variable of rolled piece measures the roll of the first mill stand in real time,
-wherein, the wear intensity of mensuration comprises each wear intensity component relevant to relative motion, for the rolled piece portion section of rolled piece.
The invention still further relates to a kind of computer program product, comprise machine code, this machine code directly can be processed by computer, and by this machine code of computer disposal, makes 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 at least one mill stand for rolling rolling stock, and this milling train is equipped with this computer.
Background technology
When rolled metal, there are wearing and tearing in roll.The degree that wearing and tearing occur is relevant to various parameter.Such as, the degree of wearing and tearing depends on the type (working roll, backing roll ... .) of roll, the type (cold rolling or hot rolling) of rolling, the layout of roll in milling train (first, second, third mill stand of milling train etc.) in other words, when use reversible mill, depend on passage numbering, rolled piece material (steel, aluminium, copper ...), the material (cast iron, steel casting, high-speed steel ... .) of roll etc.
Wearing and tearing have impact to the quality of the rolled piece of rolling.Particularly must consider wear intensity by locating correction (in plane rolled piece equally also in the whole degree of profile peace) accordingly, and compensate as much as possible.In addition, often must change roll, and reface.
Only have when the roll related to be by mill stand dismantle and can be measured comprehensively time, directly can measure roller wears.Relatively, in the ongoing operation of rolling, directly can not measure roller wears.However, it is known that the process variable of the operation of rolling will be detected, and in real time roller wears is counted by wear model.By wear model, according to the rolling section of rolled piece, during this section, the change procedure etc. of roll-force measures the wear intensity of corresponding roll.The control system that wear model is other provides the wear intensity of mensuration, such as, for correspondingly correcting location.It is also known that want off line to carry out similar calculating.In this case, the process variable used can be such as the variable expected measured under model-aided.
Also extensively set up following understanding in the recent period, that is, wear intensity can have different wear intensity components, particularly thermal wear degree component and the wear intensity component relevant to relative motion.Thermal wear degree component is to heat up and roll is lowered the temperature and caused between time of contact because of the rolled piece period of contact intermittence of roll and heating substantially.The wear intensity component relevant with relative motion is because the relative motion (lead and lag) between rolled piece and roll produces.It particularly can cause the wearing and tearing (abrasiveness wear intensity component) of rolling.
In order to the modeling of thermal wear degree component, known various method.Pure technical literature of exemplarily quoting " increases the service life of working roll " (" Increasing work-rolllife by improved roll-cooling practice ") by improvement roller cooling down operation, author P.G.Stevens etc., American Iron and Steel Institute weekly, in January, 1971, first page to ten one page.One of inventor comparatively early, to have not exceeded in disclosed european patent application 10 174 341.7 (on August 27 2010 applying date, title " measures the method for the wear intensity of the roll being used for rolling rolling stock ") in the applying date of the present invention and describe a kind of particularly preferred method of operating for measuring thermal wear degree component.
The present invention relates to and the wear intensity component relevant to relative motion is measured.Therefore, only inquire into the mensuration of thermal wear degree component and consideration in edge extent below.
When measuring location correction situation, the roll thermal crown (thermal crown) of roll also may must be considered in the prior art.Measure and consider that roll thermal crown neither theme of the present invention.
Usually the corresponding wear intensity component relevant to relative motion is measured according to following relational expression:
dA＝c·Φ·α·l (1)
Wherein, dA represents the corresponding wear intensity component relevant to relative motion of expection, c represents the constant coefficient of waste, Φ represents the pressure distribution in roll seam, α represents (length for the contact area of rolled piece and roll is substantially unique) contact angle, and l represents the length of corresponding rolled piece portion section.Coefficient of waste c is set suitably.It can be relevant to above-mentioned parameter.
But 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 measure the wearing and tearing relevant to relative motion of roll with utilizing model-aided in a reliable fashion.
This object is achieved by a kind of assay method of the wear intensity relevant to relative motion for roll.According to the present invention's design, the assay method of the described type of design beginning in the following manner,
-according to the mill stand variable of process variable in conjunction with description first mill stand and each sliding area of rolled piece variable mensuration of description rolled piece, for rolled piece portion section, in this sliding area, rolled piece when sliding on roller surface with when roll relative motion, and
-the corresponding wear intensity component relevant to relative motion is measured when considering the length of corresponding sliding area.
Therefore, the present invention is applied as basis with known conditions, namely, a region (attachment zone) is there is when rolling, wherein, rolled piece when not with abut in (adhesion) on roll when roll relative motion, and meanwhile, because so-called grinding length for the wearing and tearing relevant to relative motion, namely because roll because rolled piece is ultrafast and delayed that segment length occurring relative motion between roll and rolled piece.Possible, set up a model, directly measure sliding area by it.Alternatively, measure (all) contact lengths and (the absolute or relative) length of attachment zone, and then measure sliding area by contact length and attachment zone.Particularly there is known the model that can measure attachment zone in addition in the prior art.Pure exemplarily to quote technical literature " slide and rolling friction during four roller station hot rollings on the impact of energy and force parameter " (" Effect of Sliding andRolling Friction on the Energy-Force Parameters during Hot Rolling inFour-High Stands "), author E.A.Garber etc., in Russian metallurgy open (Metally), 2007, No. 6, the 484 to 491 page.This metal also uses in the category of rolling program calculating of being everlasting.
In the prior art, only in order to measure roll-force, roll torque and advanced argument (Voreilung) just use known model.Under the geometric shape utilizing the flow performance of rolled piece, the coefficient of friction between roll and rolled piece, desired reduction in pass, rolled piece and more situation like this, the variable described in these models can measure.But according to the present invention, also can, in order to measure attachment zone and therefore indirectly measure sliding area and consider them, wherein, can realize measuring the wearing and tearing relevant to relative motion by sliding area.
Design in a kind of preferred design, measure the corresponding wear intensity component relevant to relative motion according to following relational expression,
dA＝c·l·L·Z
Wherein, dA represents the corresponding wear intensity component relevant to relative motion, c represents that pondage factor, the l had nothing to do with process variable represents the length of corresponding rolled piece portion section, and L represents the length of sliding area, and Z represents other actuation variable relevant to process variable.Can be used relatively simply, provide the wear model of very well results by this method of operating.
Possible in the simplest situations, other actuation variable depends on the average pressure (that is the business of roll-force and contact area) in rolling gap.This method often obtains acceptable even good result.But, when other actuation variable depends on (accurately) pressure distribution in rolling gap, better result could be obtained.Such as can measure pressure distribution by average flow stress or by maximum flow curve (function as degree of deformation).
Measure the pressure distribution in rolling gap and to construct the amount of calculation of attachment zone (according to assay method) very large.Therefore, preferably design,
-to measure pressure distribution in rolling gap in conjunction with mill stand variable and rolled piece variable according to process variable when first time acquisition process variable,
The pressure distribution of-storing measurement,
-check whether these process variables there occurs change when acquisition process variable afterwards according to process variable, and
-whether change according to process variable, decision is the pressure distribution redeterminated in conjunction with mill stand variable and rolled piece variable according to new process variable in rolling gap, or or application rolling gap in the pressure distribution that stores.
Can with the realization of relatively low computing capability according to the real-time capacity of assay method of the present invention by this method of operating.
As the replacement of pressure distribution situation in rolling gap, another actuation variable can be relevant to the case hardness of roll.Such as (can be equivalent to the method set forth in european patent application 10 174 341.7 comparatively early) according to the case hardness of rolled piece measures the wear intensity component relevant to relative motion with flow stress.Alternatively, perhaps not only also the wear intensity component relevant to relative motion can be measured according to the case hardness of roll according to the pressure distribution in rolling gap when additionally taking the flow stress of rolled piece into account.Other method of operating is also possible.
If other actuation variable (also) depends on the case hardness of roll, so preferably according to process variable in conjunction with mill stand variable and rolled piece variable determination of the upper limit temperature in real time, the surface of roll can be warming up to this temperature with rolled piece period of contact.In this case, the case hardness of roll is preferably measured according to the ceiling temperature measured.
Preferably, rolling gap lubricity to be considered when measuring sliding area.
Possible, measuring for the first mill stand the wear intensity applying mensuration in the category of regulated variable.Replaceable or be attached with it is possible that by wear intensity consider be used for measuring roll replacing construction point.As long as determine roll replacing construction point, so just can perhaps connect with the Wear prediction for future the mensuration of the wear intensity component of expection.This Wear prediction applicant comparatively early, do not have a detailed description in european patent application disclosed in the applying date of the present invention 10 174 297.1 (on August 27 2010 applying date, title " can carry out the operation method of the milling train for rolling plane rolled piece of roller wears prediction ") in advance.
Model for milling train process can be made mistakes usually.Therefore, often them are adjusted by (recording) process variable obtained.If also will adjust in the category of assay method according to the present invention, various preferred method of operating so can be used.
On the one hand can:
The roll-force that-process variable occurs when being included in rolling rolling stock,
-detect roll-force,
-roll-force of expection is measured when applying the flow curve of rolled piece,
-directly or indirectly measure the corresponding wear intensity component relevant to relative motion according to flow curve, and
-according to the roll-force of detection and the roll-force trace flow moving curve of expection.
On the other hand can:
The roll-force that-process variable occurs when being included in rolling rolling stock and the advanced argument occurred when rolling rolling stock,
-detect roll-force and advanced argument,
-measure the roll-force of expection and the advanced argument of expection when applying the coefficient of friction relative to roll of the flow curve of rolled piece and rolled piece,
-directly or indirectly according to the corresponding wear intensity component relevant to relative motion of flow curve and measuring friction coefficient, and
-according to the advanced argument trace flow moving curve of the roll-force detected, the roll-force of expection, the advanced argument of detection and expection and coefficient of friction.
Preferably, in last-mentioned situation above, not only according to roll-force trace flow moving curve.In addition, preferably, not only coefficient of friction is followed the tracks of according to advanced argument.Preferably more preferably not only also realize the tracking to flow curve according to advanced argument according to roll-force.Preferably like this too for coefficient of friction.In order to trace flow moving curve and coefficient of friction, a kind of nonlinear optimizer particularly can be applied.Known many suitable optimizers like this.Purely exemplarily quote technical literature " the adaptability rolling model for cold continuous rolling " (Adaptive Rolling Model for a Cold StripTandem Mill), author Matthias Kurz etc., calendar year 2001 AISE.
In order to detect advanced argument, need a kind of device that can detect the speed of the output side of rolled piece by it exactly.Such as can settle ring-type lift (Schlingenheber) at mill stand rear, its roller is positioned on rolled piece.Very well close to time, the peripheral speed of ring-type lift is equivalent to the speed of the output side of rolled piece.When using steel plate reversible mill, the length of rolled piece (afterwards) before rolling can also be detected by measuring technique, and according to the length detected in conjunction with the duration of roll pass and circular path mensuration advanced argument (hysteresis) that lived through by roll during this period.
Under the prerequisite using corresponding measurement mechanism, roll-force can be obtained in each mill stand.But possible, in some mill stand, only just implement the acquisition to advanced argument.Such as not only also can realize following the tracks of to coefficient of friction to flow curve also obtaining except roll-force (the first mill stand) in the mill stand of advanced argument in this case.In other mill stand, wherein only obtain roll-force, but do not obtain advanced argument, (the second mill stand) can according to roll-force only trace flow moving curve.But possible, coefficient of friction that determine the roll relative to the second mill stand of rolled piece according to the coefficient of friction followed the tracks of for the first mill stand, that apply in the category of the wear intensity of the roll of mensuration second mill stand.Particularly can receive the coefficient of friction of the first mill stand, or utilize a factor to calculate in proportion to draw.
In many cases, first rolled piece runs through the second mill stand, and then just runs through the first mill stand.Such as 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.
In addition it is also possible that after remove roll from mill stand, this roll is measured, so and measure the actual wear degree of this roll.In this case, off line wear model can be adjusted according to the expection wear intensity measured by wear model and the actual wear degree recorded.
Also be achieved by a kind of computer program product starting described type according to object of the present invention.The so described computer program product of design in this case, that is, by computer disposal machine code, make this computer-implemented have according to assay method of the present invention assay method in steps.
This object is also achieved by a kind of computer, and this computer designs like this, i.e. this computer-implemented this assay method.
This object is also achieved by a kind of milling train starting described type, and this milling train is equipped with this computer.
Accompanying drawing explanation
Below, the description in conjunction with the embodiment of more elaboration is with reference to the accompanying drawings clearer and set forth above-mentioned characteristic of the present invention, feature and advantage with being more readily understood, and realizes these characteristics, the mode of feature and advantage and method.Shown in it:
Fig. 1 schematically shows milling train,
Fig. 2 illustrates flow chart,
Fig. 3 schematically shows rolling gap,
Fig. 4 to 7 illustrates flow chart,
Fig. 8 schematically shows milling train, and
Fig. 9 and 10 illustrates flow chart.
Detailed description of the invention
According to Fig. 1, a milling train has multiple mill stand 1.Alternatively, this milling train only can have a unique mill stand 1, such as, when using reversible mill.In mill stand 1, rolled piece 2 is rolled.This rolled piece 2 is made of metal, such as, be made up of copper, aluminium, brass or steel.In mill stand 1, alternatively can carry out cold rolling or hot rolling, wherein, be generally 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, is that is with steel or steel plate.Alternatively, particularly in order to rolled piece 2 that is rolling unique outlook, shaft-like or tubulose, backing roll 4 can be saved, namely only there is working roll 3.
This milling train is equipped with computer 5.According to the displaying of Fig. 1, this computer 5 can control milling train, is namely designed to computer for controlling.But this is not mandatory necessary.Computer program 6 pairs of computers 5 are utilized to programme.Can such as pass through data medium 7 to computer 5 transport of computer program 6, computer program 6 stores on the data carrier in machine-readable mode.Purely exemplarily in FIG data medium 7 is shown for usb memory stick.But can not understand this diagram to limitation.
Computer program 6 comprises the machine code 8 that directly can be processed by computer 5.Make computer 5 implement a kind of assay method by computer 5 handling machine code 8, more at large set forth the method below in conjunction with Fig. 2.So, carry out programming with computer program 6 and make correspondingly to construct computer 5.
According to Fig. 2 (complementally see Fig. 1), computer 5 is that wear intensity d is set to initial value d0 by specific roll 3,4 (working roll 3 in such as Fig. 1 above intermediate mill support 1) in step sl.Such as can by operator 9 or by alternate manner for computer 5 provides initial value d0.A kind of other possibility of initial value d0 that provides such as is, automatically transmits initial value d0 from the Grinding machine shops of the roll 3,4 involved by fine grinding to computer 5.
In step s 2, computer for controlling 5 known rolled piece variable W1, this variable description be the rolled piece 2 that will be rolled.Rolled piece variable W1 such as comprises the chemical composition of rolled piece 2, temperature and geometric data.Particularly geometric data is with temperature is relevant with state in addition usually, and in this condition, rolled piece 2 enters in observed mill stand 1.When plane rolled piece 2, geometric data particularly can comprise width and the thickness of rolled piece.Computer 5 can be allowed to learn rolled piece variable W1 in the mode being similar to initial value d0.
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 such as comprises the installation site of observed roll 3, namely such as in the mill stand 1 of the first, second, third, etc. etc. of the roller mill of multi-frame.In addition, mill stand variable W2 comprises the geometric data (width and diameter) of the static state of the material (such as high-speed steel HSS) of roll 3, the type (working roll, backing roll, intermediate calender rolls etc.) of roll 3 and observed roll 3.Computer 5 can be allowed to learn mill stand data W2 in the mode being similar to rolled piece data W1.
In step s 4 which, computer 5 acquisition process variable P during rolling rolling stock 2 in observed mill stand 1.What process variable P described is the operation of rolling in observed mill stand 1.Such as fully or partly can detect these process variables by corresponding measuring transducer, and flow to computer 5.Particularly can by corresponding dynamometer direct-detection rolling force F W.In a similar fashion, the revolution nW of observed roll 3 can be detected by corresponding sensor, thus draw its peripheral speed at once in conjunction with (known) diameter of observed roll 3.Alternatively, fully or partially by calculating process variable p can be measured.Such as often can only measure advanced argument by calculating.But if obtain the speed of the rolled piece 2 exported from mill stand 1 by measuring technique, the relation so also can passing through the peripheral speed of this speed and observed roll 3 measures advanced argument.In this case, it is equally also the variable being measured as basis.Such as can by detecting the speed of the rolled piece 2 exported from mill stand 1 at the revolution nS being positioned at the ring-type lift roller 10 on rolled piece 2 at observed mill stand 1 rear.Such as owing to calculating rolling program, so other process variable P (location of such as mill stand 1, the lubrication between roll 3 and rolled piece 2) can be known.
In step s 5, computer 5 measures sliding area 13 (see Fig. 3) and its length L in conjunction with rolled piece variable W1 and mill stand variable W2 by rolling gap former 11 according to process variable P.Sliding area 13 is equivalent to certain region in (see Fig. 3) rolling gap, and in this region, rolled piece 2 is when sliding on roller surface with when roll 3 relative motion.Therefore, in sliding area 13, bar rolling speed in observed position just or (specifically in the region entering side) be less than the peripheral speed that the peripheral speed of roll 3 or (specifically in the region exporting side) are greater than observed roll 3.Sliding area 13 is contrary with attachment zone 14, and in attachment zone, the bar rolling speed on observed position equals the peripheral speed of observed roll 3.Sliding area 13 forms the contact area 15 of roll 3 together with attachment zone 14, and in this region, roll 3 contacts rolled piece 2.The difference of sliding area 13 and attachment zone 14 (purely in drawing technique) is in figure 3, the speed of rolled piece 2 in the sliding area 13 entering side represents by small arrow, and the speed in the sliding area 13 exporting side represents with large arrow, meanwhile, the speed of rolled piece 2 in attachment zone 14 is represented with medium sized arrow.When measuring sliding area 13, computer 5 preferably will take rolling gap lubricity into account in addition.
Various possibility is there is in order to measure sliding area 13.At present preferably, first in a known manner (still there is not the difference between sliding area 13 and attachment zone 14) and measure contact area 15, then measuring attachment zone 14 in mode known equally and last (result according to measuring attachment zone 14 is absolute value or relative value) 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 measure sliding area 13, attachment zone 14 and/or contact area 15 time relatedly consider the effect of roll flattening-out.In order to measure contact area 15 and attachment zone 14, particularly rolling gap former 11 can be used.There is known corresponding rolling gap former 11.Pure schematically with reference to the technical literature described in beginning of the people such as Garber.
In step s 6, computer 5 measures the wear intensity component dA relevant to relative motion.Computer 5 measures the wear intensity component dA relevant to relative motion when considering measure in step S5 sliding area 13 in step s 6.Particularly relevant to relative motion wear intensity component dA and the length L of sliding area 13 is proportional.
In an optional step S7, computer 5 measures 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.But, generally need not have any different between sliding area 13 and attachment zone 14.Particularly can according to starting the method mensuration thermal wear degree component dT elaborated in the european patent application 10 174 341.7 mentioned.
In step s 8, computer 5 upgrades wear intensity d by the following method, that is, the wear intensity component dA relevant to relative motion and other the wear intensity component dT that may also have adds on the wear intensity d that draws so far by it.
In step s 9, computer 5 uses the wear intensity d measured.Such as, if computer 5 is according to the display and control milling train in Fig. 1, so it can measure for observed mill stand 1 the wear intensity d applying mensuration in the category of regulated variable S.Alternatively or as a supplement, the greatest wear degree of the wear intensity d of mensuration and permission can be made comparisons by computer 5, and may give the alarm to operator 9, make at certain (measuring according to wear intensity d) roll replacing construction point must change observed roll 3.Other method is also possible.
In step slo, computer 5 checks whether the rolling terminated rolled piece 2.If not, computer 5 turns back to step S4, thus it re-executes step S4 to S10.
As can be seen from above embodiment, computer 5 is only that a rolled piece portion section 16 calculates the wear intensity component dA relevant to relative motion and also may calculate other wear intensity component dT, and this rolled piece portion section is rolled in observed mill stand 1 during correspondingly experiencing the circular flow be made up of step S4 to S10.Therefore, computer 5 measures the wear intensity component dA relevant to relative motion according to following relational expression in step s 6, as Fig. 2 step S6 described in,
dA＝c·l·L·Z
Wherein, c is the pondage factor irrelevant with process variable P, and l is the length of corresponding rolled piece portion section 16, and Z is another actuation variable relevant to process variable P.
The mensuration to other actuation variable Z can be implemented in various different ways.A kind of possible method of operating measuring other actuation variable Z is set forth below in conjunction with Fig. 4.
According to Fig. 4, computer 5 is in the step s 21 according to temperature and the chemical composition of process variable P, rolled piece variable W1 and mill stand variable W2, such as rolled piece 2, and in conjunction with the geometric shape of rolled piece 2 and desired reduction in pass, measure the pressure distribution in rolling gap.Also can use rolling gap former 11 for this reason.For professional and technical personnel, the method for designing of this rolling gap former 11 is known.
In step S22, computer 5, according to process variable P, rolled piece variable W1 and mill stand variable W2, such as roller diameter, roll revolution, rolled piece geometric shape and rolled piece temperature, measures the ceiling temperature of observed roll 3.The surface that this ceiling temperature (at least substantially) equals observed roll 3 is in that temperature be promoted to rolled piece 2 period of contact.For professional and technical personnel, corresponding roll model is known.In step S23, computer 5 is with regard to the case hardness of the roll 3 observed by the ceiling temperature mensuration according to roll 3.
In step s 24 which, computer 5 measures another actuation variable Z.Such as computer 5 can measure another actuation variable Z according to the design of step S24:
-according to the pressure distribution in rolling gap, particularly proportional with the pressure distribution in rolling gap,
-according to the case hardness of observed roll 3, such as in the following manner, that is, another actuation variable Z is less, and case hardness is larger,
-according to other process variable (particularly rolling gap lubricity) or
-measure according to a kind of method of operating of combination.
In step s 6, computer 5 measures the wear intensity dA relevant to relative motion according to the following relational expression set forth:
dA＝c·l·L·Z。
The amount of calculation measuring the pressure distribution in rolling gap is relatively large.Therefore, preferably design according to Fig. 5 according to the method for Fig. 4.
According to Fig. 5, computer checks in step S31 after acquisition process variable P whether these process variables P there occurs change.If this is the case, then computer 5 measures the pressure distribution in rolling gap in step 21, and is stored in step s 32 in memory 17 (see Fig. 1).If process variable P does not change, so computer 5 is transitioned into step S33 from step S31, and wherein, computer 5 reads the pressure distribution in rolling gap from memory 17 when not re-starting mensuration.
Must guarantee that computer is transitioned into step S21 and S32 when first time execution of step S31.This such as can realize in the following manner, namely computer 5 by process variable P when initializing (also before first section 16 of rolled piece 2 is rolled) be set to insignificant value, such as rolling force F W is set to value 0.
If achieve the mensuration to the wear intensity component dA relevant to relative motion when applying the flow stress of rolled piece 2, so preferably upgrade coefficient of friction and/or flow stress often.If to have updated outside assay method according to the present invention in the category that coefficient of friction and/or flow stress-such as calculate at rolling force model or rolling program-possible, these values are all received respectively according in assay method of the present invention.Alternatively, the assay method for measuring wear intensity d can be adjusted.Fig. 6 and 7 illustrates two kinds of preferred methods of operating.
According to Fig. 6, computer 5 to measure pressure distribution, the rolling force F W ' of expection and the advanced argument v ' of expection in rolling gap in step S41 by rolling gap former 11 according to process variable P, rolled piece variable W1 and mill stand variable W2.
Process variable p also comprises rolling force F W and advanced argument v usually.Rolling force F W normally obtains by measuring technique.But in the category of step S41, but do not use rolling force F W, namely actual roll-force.When performing step S41, alternatively 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 ' of expection and the advanced argument v ' of expection.Because the pressure distribution in the wear intensity component dA relevant to relative motion and rolling gap is correlated with, therefore measure the wear intensity component dA relevant to relative motion according to flow curve.In this case, this incidence relation is indirectly natural quality.Alternatively, can be direct incidence relation under certain conditions.
Therefore, the rolling force F W ' of the expection measured by it and actual rolling force F W can make comparisons in step S42 according to Fig. 6 by computer 5.If existed (obvious deviation), so computer 5 is transitioned into step S43.In step S43, the rolling force F W of computer 5 according to detection and rolling force F W ' the trace flow moving curve of expection.
Fig. 7 is from Fig. 6 substantially.But substituted for step S42 and S43 with step S46 and S47.
In the design of Fig. 7, prerequisite is except rolling force F W additionally provides the measurand of advanced argument v as reality, is namely acquired.On the contrary, the advanced argument v ' measuring expection in step S41 but realizes when not utilizing actual advanced argument v.Alternatively, be measure the advanced argument v's ' of expection when the flow curve of application rolled piece 2 and the coefficient of friction relative to observed roll 3.As has already been stated, be the mensuration of the rolling force F W ' realized when also utilizing flow curve simultaneously expection.
Coefficient of friction-the same with flow curve-the participate in mensuration to the wear intensity dA relevant to 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 the advanced argument v of reality and the advanced argument v ' of expection is compared mutually.When there is obvious deviation, computer 5 is transitioned into step S47.In step S47, computer 5 is according to rolling force F W ', the advanced argument v of rolling force F W, expection and advanced argument v ' the trace flow moving curve of expection and coefficient of friction.Particularly can realize following the tracks of by nonlinear optimizer (not shown).
Method of operating according to Fig. 6 and 7 can combine mutually.Particularly possible is (see Fig. 8), some mill stand 1 for the roller mill of multi-frame not only provides rolling force F W also to provide advanced argument v as surveyed process variable P, and only provides rolling force F W, do not provide advanced argument v as measurand for other mill stand 1 of this roller mill.According to Fig. 8, such as in the mill stand 1 in front, only obtain corresponding roll-force, and not only obtain in 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 advanced argument v.
In order to be wherein only obtain rolling force F W, the mill stand 1 but not obtaining advanced argument v follows the tracks of coefficient of friction, such as can according to Fig. 9 and 10 amendment according to the method for operating of Fig. 6 and 7.Wherein, Fig. 9 is the amendment to Fig. 7, and Figure 10 is the amendment to Fig. 6.
According to Fig. 9, in order to one of them also obtains the mill stand 1 of advanced argument v as measurand, in step s 51 for other mill stand 1 provides the coefficient of friction followed the tracks of and obtain.According to Figure 10, in step S56, obtain the coefficient of friction provided by mill stand 1, in this mill stand, do not obtain advanced argument, and therefrom measure suitable coefficient of friction.Suitable factor such as can be utilized in step S56 to calculate coefficient of friction in proportion.
According to Fig. 8, first rolled piece 2 runs through and wherein only obtains rolling force F W, does not but obtain the mill stand 1 of advanced argument v, and just runs through afterwards and wherein not only obtain the mill stand 1 that rolling force F W also obtains advanced argument v.Particularly the mill stand 1 in front 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 operations according to the instant invention method makes it possible to well and the wear intensity component dA that reliably expection is relevant to relative motion.In addition, particularly combine and according to the principle of european patent application 10 174 341.7, mensuration is carried out to thermal wear degree component dT following possibility is provided, 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 former 11 according to Fig. 1.Alternatively, rolling gap former 11 can be positioned in outside wear model 12, such as, within rolling program calculation element.In addition, better susceptibility can be had relative to change in process, such as, other change in the change of rolling gap lubricity or the coefficient of friction between rolled piece 2 and observed roll 3.Can also better analog rolling gap lubricity on the impact of wear intensity d.
Preferably apply the present invention when hot rolling plane rolled piece 2.But equally also can apply the present invention when cold rolling plane rolled piece 2.Not only also have during the rolled piece 2 of other type cold rolling in hot rolling and also can apply the present invention, such as shaft-like rolled piece 2 or the rolled piece 2 of unique outlook.In addition, the wear intensity component dA relevant to relative motion (with perhaps also having other wear intensity component dT) that measure in the direction of the width when plane rolled piece 2 of not touching upon above is with spatial resolution or without spatial resolution.Self-evidently, these two kinds of methods of operating are all fine.
Although by preferred embodiment more elaboration and description details of the present invention, the present invention is not limited to disclosed example, and can be derived other change programme when not leaving protection scope of the present invention by professional and technical personnel.
Claims (21)
1. for an assay method for the wear intensity (d) of the roll (3) of the first mill stand of rolling rolling stock (2),
-wherein, in described first mill stand, rolled piece (2) period described in rolling, obtains the process variable (P) describing the operation of rolling,
-wherein, the described wear intensity (d) of the described roll (3) of described first mill stand is measured in real time according to the mill stand variable (W2) of described first mill stand (1) of described process variable (P) combination description and the rolled piece variable (W1) of the described rolled piece of description
-wherein, and the described wear intensity (d) of mensuration comprises each wear intensity component (dA) relevant to relative motion, for rolled piece portion section (16) of described rolled piece (2),
-wherein, the described rolled piece variable (W1) combining described mill stand variable (W2) and the described rolled piece of description describing described first mill stand according to described process variable (P) measures each sliding area (13), for described rolled piece portion section (16), in described sliding area, described rolled piece (2) when sliding on roller surface with when described roll (3) relative motion, and
-wherein, the corresponding described wear intensity component (dA) relevant to relative motion is measured when considering length (L) of corresponding described sliding area (13).
2. assay method according to claim 1, is characterized in that, measures the corresponding described wear intensity component (dA) relevant to relative motion according to following relational expression,
dA＝c·l·L·Z
Wherein, the length that dA represents the corresponding described wear intensity component relevant to relative motion, c represents the pondage factor irrelevant with described process variable (P), l represents corresponding described rolled piece portion section (16), L represents the length of described sliding area (13), and Z represents another actuation variable relevant to described process variable (P).
3. assay method according to claim 2, is characterized in that, described another actuation variable (Z) is relevant to the pressure distribution in rolling gap.
4. assay method according to claim 3, is characterized in that,
-to measure pressure distribution in described rolling gap in conjunction with described mill stand variable (W2) and described rolled piece variable (W1) according to described process variable (P) when first time obtains described process variable (P),
The pressure distribution of-storing measurement,
-check whether described process variable (P) there occurs change when obtaining described process variable (P) afterwards according to described process variable (P), and
-whether change according to described process variable (P), decision is the pressure distribution redeterminated in conjunction with described mill stand variable (W2) and described rolled piece variable (W1) according to new process variable (P) in described rolling gap, or still applies the pressure distribution stored in described rolling gap.
5. according to the assay method described in claim 2,3 or 4, it is characterized in that, described another actuation variable (Z) is relevant to the case hardness of described roll (3).
6. assay method according to claim 5, it is characterized in that, according to described process variable (P) in conjunction with described mill stand variable (W2) and described rolled piece variable (W1) determination of the upper limit temperature in real time, 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 measured.
7. assay method according to any one of claim 1 to 4, is characterized in that, will consider rolling gap lubricity when measuring described sliding area (13).
8. assay method according to claim 6, is characterized in that, will consider rolling gap lubricity when measuring described sliding area (13).
9. assay method according to any one of claim 1 to 4, it is characterized in that, measuring the described wear intensity (d) of applying mensuration in the category of regulated variable (S) for described first mill stand, and/or described wear intensity is considered to be used for measuring roll replacing construction point.
10. assay method according to claim 8, it is characterized in that, measuring the described wear intensity (d) of applying mensuration in the category of regulated variable (S) for described first mill stand, and/or described wear intensity is considered to be used for measuring roll replacing construction point.
11. assay methods according to any one of claim 1 to 4, is characterized in that,
The roll-force (FW) that-described process variable (P) occurs when being included in rolled piece described in rolling (2),
-detect described roll-force (FW),
-roll-force (FW ') of expection is measured when applying the flow curve of described rolled piece (2),
-directly or indirectly measure the corresponding described wear intensity component (dA) relevant to relative motion according to described flow curve, and
-follow the tracks of described flow curve according to the roll-force (FW) detected and the roll-force (FW ') of expecting.
12. assay methods according to claim 10, is characterized in that,
The roll-force (FW) that-described process variable (P) occurs when being included in rolled piece described in rolling (2),
-detect described roll-force (FW),
-roll-force (FW ') of expection is measured when applying the flow curve of described rolled piece (2),
-directly or indirectly measure the corresponding described wear intensity component (dA) relevant to relative motion according to described flow curve, and
-follow the tracks of described flow curve according to the roll-force (FW) detected and the roll-force (FW ') of expecting.
13. assay methods according to any one of claim 1 to 4, is characterized in that,
The roll-force (FW) that-described process variable (P) occurs when being included in rolled piece described in rolling (2) and the advanced argument (v) occurred when rolled piece described in rolling (2),
-detect described roll-force (FW) and described advanced argument (v),
-measure expection when applying flow curve and the coefficient of friction relative to described roll (3) of described rolled piece (2) of described rolled piece (2) roll-force (FW ') and the advanced argument (v ') of expecting
-directly or indirectly according to the corresponding described wear intensity component (dA) relevant to relative motion of described flow curve and described measuring friction coefficient, and
-follow the tracks of described flow curve and described coefficient of friction according to the advanced argument (v ') of the advanced argument (v) of the roll-force (FW ') of the roll-force (FW) of described detection, described expection, described detection and described expection.
14. assay methods according to claim 10, is characterized in that,
The roll-force (FW) that-described process variable (P) occurs when being included in rolled piece described in rolling (2) and the advanced argument (v) occurred when rolled piece described in rolling (2),
-detect described roll-force (FW) and described advanced argument (v),
-measure expection when applying flow curve and the coefficient of friction relative to described roll (3) of described rolled piece (2) of described rolled piece (2) roll-force (FW ') and the advanced argument (v ') of expecting
-directly or indirectly according to the corresponding described wear intensity component (dA) relevant to relative motion of described flow curve and described measuring friction coefficient, and
-follow the tracks of described flow curve and described coefficient of friction according to the advanced argument (v ') of the advanced argument (v) of the roll-force (FW ') of the roll-force (FW) of described detection, described expection, described detection and described expection.
15. assay methods according to claim 13, it is characterized in that, roll (3) for the second mill stand implements the claims the assay method described in 11, and according to the coefficient of friction followed the tracks of for described first mill stand determine the described roll (3) relative to described second mill stand of described rolled piece (2), measure described second mill stand described roll (3) wear intensity (d) category in the coefficient of friction applied.
16. assay methods according to claim 14, it is characterized in that, roll (3) for the second mill stand implements the claims the assay method described in 9, and according to the coefficient of friction followed the tracks of for described first mill stand determine the described roll (3) relative to described second mill stand of described rolled piece (2), measure described second mill stand described roll (3) wear intensity (d) category in the coefficient of friction applied.
17. assay methods according to claim 15, is characterized in that, described rolled piece (2) first runs through described second mill stand, and then just run through described first mill stand.
18. assay methods according to claim 16, is characterized in that, described rolled piece (2) first runs through described second mill stand, and then just run through described first mill stand.
19. assay methods according to claim 17, is characterized in that, described second mill stand is the breaking down frame of blooming mill, and described first mill stand is the finishing stand of finishing mill.
20. assay methods according to claim 18, is characterized in that, described second mill stand is the breaking down frame of blooming mill, and described first mill stand is the finishing stand of finishing mill.
21. 1 kinds of use computers carry out method for measuring, it is characterized in that, described method performs the institute of the assay method according to any one of claim 1 to 20 in steps.
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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| Publication Number | Publication Date |
|---|---|
| CN102886385A CN102886385A (en) | 2013-01-23 |
| CN102886385B true 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 |
Country Status (3)
| Country | Link |
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| EP (1) | EP2548665B1 (en) |
| CN (1) | CN102886385B (en) |
| PL (1) | PL2548665T3 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| US9592866B2 (en) | 2014-11-06 | 2017-03-14 | Caterpillar Inc. | Track assembly having a wear monitoring system |
| US9557244B2 (en) | 2014-11-10 | 2017-01-31 | Caterpillar Inc. | Thrust bias detection system |
| US9371630B1 (en) | 2014-12-19 | 2016-06-21 | Caterpillar Inc. | Determination of undercarriage idler and roller wear based on final drive speed |
| CN205659983U (en) | 2016-06-15 | 2016-10-26 | 日照宝华新材料有限公司 | ESP production line is with long kilometer number rolling rollers |
| CN106694572B (en) * | 2017-02-28 | 2018-12-04 | 中冶华天工程技术有限公司 | On-line rolling technique adjustment system and method based on roll wear detection |
| US11919059B2 (en) | 2019-01-28 | 2024-03-05 | Primetals Technologies Germany Gmbh | Changing the effective contour of a running surface of a working roll during hot rolling of rolling stock in a roll stand to form a rolled strip |
| 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 |
| CN114589205B (en) * | 2022-04-08 | 2023-03-28 | 燕山大学 | Method for determining online roll changing time node in strip rolling process |
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| SU1329858A1 (en) * | 1986-01-03 | 1987-08-15 | Криворожский Филиал Киевского Института Автоматики Им.Хху Съезда Кпсс | Apparatus for automatic check of wear of hot rolling mill rolls |
| CN101507978A (en) * | 2009-03-20 | 2009-08-19 | 燕山大学 | Worker roller abrasion forecasting method of cold continuous rolling device based on mechanism and operation condition |
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| JPH02255207A (en) * | 1989-03-30 | 1990-10-16 | Kawasaki Steel Corp | Method for monitoring surface characteristic of rolling roll in hot finish rolling |
| JPH03138013A (en) * | 1989-10-24 | 1991-06-12 | Kawasaki Steel Corp | Control method for work roll bending in rolling of metal plate |
| JPH0417920A (en) * | 1990-05-11 | 1992-01-22 | Furukawa Electric Co Ltd:The | Method for measuring roll life of rolling mill |
| AU5091198A (en) | 1996-10-22 | 1998-05-15 | Hemocleanse, Inc. | Continuous flow-through peritoneal dialysis (cfpd) method with control of intraperitoneal pressure |
| AT407117B (en) | 1997-09-19 | 2000-12-27 | Immuno Ag | FIBRINE SPONGE |
| JP3548514B2 (en) * | 2000-04-13 | 2004-07-28 | 新日本製鐵株式会社 | Prediction method of work roll wear of rolling mill |
-
2011
- 2011-07-22 PL PL11175028T patent/PL2548665T3/en unknown
- 2011-07-22 EP EP11175028.7A patent/EP2548665B1/en active Active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1329858A1 (en) * | 1986-01-03 | 1987-08-15 | Криворожский Филиал Киевского Института Автоматики Им.Хху Съезда Кпсс | Apparatus for automatic check of wear of hot rolling mill rolls |
| CN101507978A (en) * | 2009-03-20 | 2009-08-19 | 燕山大学 | Worker roller abrasion forecasting method of cold continuous rolling device based on mechanism and operation condition |
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| Publication number | Publication date |
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| EP2548665A1 (en) | 2013-01-23 |
| CN102886385A (en) | 2013-01-23 |
| EP2548665B1 (en) | 2014-02-12 |
| PL2548665T3 (en) | 2014-07-31 |
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