CN103097046A - Method for determining wear on a roll for rolling metal stock - Google Patents
Method for determining wear on a roll for rolling metal stock Download PDFInfo
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- CN103097046A CN103097046A CN2011800414586A CN201180041458A CN103097046A CN 103097046 A CN103097046 A CN 103097046A CN 2011800414586 A CN2011800414586 A CN 2011800414586A CN 201180041458 A CN201180041458 A CN 201180041458A CN 103097046 A CN103097046 A CN 103097046A
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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
In order to determine wear (d) on a roll (3) for rolling metal stock (1) a volume temperature distribution (VT) of the roll (3) is updated with reference to a heat flow distribution (WT) occurring on the surface of the roll (3) by means of a temperature model of the roll (3). The volume temperature distribution (VT) is spatially resolved at least in the axial direction and in the radial direction of the roll (3). The heat flow distribution (WT) is spatially resolved in the axial direction and in the tangential direction of the roll (3). The wear (d) on the roll (3) is determined by means of a wear model (11). Within the context of the wear model (11) at least one upper surface temperature (T") which occurs at specific points on the surface of the roll (3) is determined with reference to the updated volume temperature distribution (VT) and/or the heat flow distribution (WT) while the respective point is in contact with the metal stock (1). The wear (d) on the roll (3) is determined taking account of the upper surface temperature (T") of the roll (3).
Description
Technical field
The present invention relates to a kind of assay method of wearing and tearing of the roll for rolling rolling stock.
The invention still further relates to a kind of computer program module, it comprises machine code, and machine code can directly be carried out by computer, and by the execution generation such effect of computer to machine code, namely computer is carried out this assay method.
The invention still further relates to a kind of computer, it designs like this, and namely this computer is carried out this assay method.
The invention still further relates to a kind of milling train for rolling rolling stock, its design has this computer.
Background technology
Wear and tear in roll place's appearance when rolled metal.The degree that wearing and tearing wherein occur depends on various parameters.For example the degree of wearing and tearing depends on type (working roll, the backing roll of roll,), layout (first, second, third mill stand of milling train etc.) in milling train of rolling type (cold rolling or hot rolling), roll, material (steel, aluminium, the copper of rolled piece,), the material of roll (cast iron, cast steel, efficient high-speed steel ...) etc.
The quality of the rolled piece of wearing and tearing meeting influence of rolled.Especially, wearing and tearing must proofread and correct by corresponding adjustment-for may be also for the flat-rolled part aspect profile and flatness-be considered, and compensate according to possibility.Roll must often be replaced and finish grind in addition.
Only remove and just may directly measure roll wear can be measured the time from mill stand when the roll that relates to.Can not directly measure roll wear on the contrary in the operation of rolling of operation.Yet be known that the process variable of measuring the operation of rolling and calculate together in real time rolling wearing and tearing by means of wear model.Depend on section's section that rolled piece is rolled, measure the wearing and tearing of corresponding roll through tendency of the roll-force of this section etc. by means of wear model.Wear model provides the wearing and tearing of measuring for other control system, for example is used for adjusting is proofreaied and correct accordingly.
Also disclosed is to carry out similarly off-line and calculate.The process variable that uses can be for example the parameter of the expection measured in the mode of model supports in the case.
Usually according to this relation carry out to wearing and tearing mensuration
d＝c·Ф·α·l (1)
Be the wearing and tearing of expection at this d, c is the wear factor of fixing, and Ф is the pressure distribution in the roll seam, and α is that contact angle and l are the length that is rolled.
Wear factor c is compatibly set.It can depend on above-mentioned parameter.
When rolling also must to be used for profile-and the mensuration of flatness control element adjust the category that parameter measures and measure hot convexity.This is realization so in the prior art, and the heat flux distribution that namely appears on roller surface in the basis in service that turns round is upgraded the bulk temperature distribution of roll continuously by means of the temperature model of roll.At least on the axial direction at roll and in the radial direction bulk temperature is distributed at this and carry out zone and resolve, on the axial direction of roll and on tangential direction, heat flux distribution is being carried out the zone parsing.
Concept " axial direction ", radial direction " and " tangential direction "-aforementioned and also next-all the time relating to the rotating shaft of roll.Axial direction is parallel to rotating shaft.Radial direction is all the time perpendicular to rotating shaft.Tangential direction is to have constant spacing ground to illustrate around rotating shaft with rotating shaft.
Exemplarily pure, consult June 7 nineteen ninety-five aspect the working method of prior art at the Modelling of london publishing of metal rolling processes symposium7, the people's such as P.A.Atack professional paper " An investigation into the control of thermal camber by spray cooling when hot rolling aluminium " in cooling in rolling mills.In the category of the professional paper of mentioning, using not in the situation that the bulk temperature that carries out on tangential direction resolving in the zone distributes, realize the mensuration to hot convexity.Measure heat flux distribution on tangential direction.In the situation that use the heat flux distribution of measuring, upgrade and the distribution of tracking bulk temperature.
Professional paper " Increasing work-roll life by improved roll-cooling practice " by the 1st to the 11 page of people such as P.G.Stevens in the Journal of in January, 1971 The Iron and Steel Institute is known, the wearing and tearing of roll also can comprise the thermal wear component, and the thermal wear component in the first approximate situation by different roller parameters and rolled piece parameter and definite by variable " maximized surface temperature ", " minimal surface temperature " and the temperature of inside " roll ".
Summary of the invention
The object of the invention is to, propose a kind of possibility, can measure wearing and tearing in the mode of model supports in reliable mode.
The assay method of the feature of this purpose by having claim 1 is realized.The favourable design of assay method is the content of dependent claims 2 to 13.
Propose according to the present invention, the assay method of the described type of beginning designs thus,
-upgrade the bulk temperature distribution of roll by means of the temperature model of roll according to the heat flux distribution in the appearance of the surface of roll,
-bulk temperature is distributed carry out zone parsing at least on the axial direction of roll and in the radial direction,
-on the axial direction of roll and on tangential direction, heat flux distribution is being carried out the zone parsing,
-measure the wearing and tearing of roll by means of wear model,
-in the category of wear model
--distribute and/or heat flux distribution is measured at least one upper surface temperature according to the bulk temperature that upgrades, at corresponding point and rolled piece period of contact, this surface that this upper surface temperature appears at roll is the fixed point place really, and
--in the situation that consider the wearing and tearing of the upper surface temperature mensuration roll of roll.
There are two possibilities in order to measure the upper surface temperature according to the data of temperature model, the bulk temperature distribution of namely upgrading and heat flux distribution.
Possible is on the tangential direction of roll, bulk temperature not to be distributed and carry out the zone parsing on the one hand.In the case, the bulk temperature of renewal distributes and has defined the average surface temperature distribution of carrying out in the axial direction the zone parsing, and this average surface temperature distributes and characterized the average surface temperature of roll.In the case, measure thus the upper surface temperature,
-according to measure corresponding time of contact in the zone in the axial direction at the process variable aspect the roll rolling rolling stock with resolving, characterized the corresponding of roll time of contact and how long contacted with rolled piece during roller rotational, and
-according to the average surface temperature of roll distribute, heat flux distribution in the part of roll and the appearance of rolled piece period of contact and measure the upper surface temperature time of contact.
Possible is also on the tangential direction of roll, bulk temperature to be distributed and carry out the zone parsing on the other hand.Possible in the case is only to distribute to measure the upper surface temperature according to the bulk temperature that upgrades.
Wearing and tearing preferably include the thermal wear component.For example other in the upper surface temperature of using roll and at least one, in the situation that the surface temperature realization aspect roller surface to the mensuration of thermal wear component.Introduce alternatively other, the surface temperature aspect roller surface, can be introduced in the interior temperature distribution that roll inside draws.
In addition, wearing and tearing preferably include the grinding loss component.Preferably in the situation that use the case hardness realization of roll to the mensuration of grinding loss component.In the case, in the situation that use the mensuration that the upper surface temperature of roll realizes the case hardness of breaker roll.Can form the mensuration that realizes the grinding loss component in the situation that additionally use temperature and/or the material of rolled piece.
Possible is that heat flux distribution is scheduled like this.Yet preferably, according to the process variable aspect the roll rolling rolling stock and roll, measure heat flux distribution by the distribute initial surface Temperature Distribution of definition of the bulk temperature that upgrades not yet.
Possible is, process variable (at least part of) is the parameter of the expection measured in the mode of model supports.Alternately also possible that, process variable (at least part of) is actual amount, and this actual amount is detected during passing through the roll rolling rolling stock.Mixed form is also possible.For example can be set out by actual amount detected during rolling, measure the first attrition value of temporary transient expection.Attrition value by temporary transient expection sets out, and then can carry out according to the respective process parameter of expection in the future the prediction to the wearing and tearing of later appearance.
Can carry out in real time this assay method during by the roll rolling rolling stock.Alternately also can carry out this assay method before passing through the roll rolling rolling stock.Also may carry out after by the roll rolling rolling stock.
Possible is, only measures wearing and tearing and for example provides to the operator of milling train.Yet preferably, consider the wearing and tearing of mensuration in measuring the category of adjusting parameter, these adjust parameters affects the rolling of rolled piece.
Also realize by a kind of computer program module that starts described type according to purpose of the present invention in addition.Design so in the case this computer program module, namely this computer carry out have according to assay method of the present invention assay method in steps.
Purpose of the present invention also realizes by a kind of computer in addition, designs so this computer, and namely this computer is carried out such operation method.
Purpose of the present invention also realizes by a kind of milling train for rolling flat-rolled part in addition, and this rolling mill design has such computer.
Description of drawings
Other advantage and details are drawn by the explanation of following embodiment to by reference to the accompanying drawings.Shown in schematic diagram:
Fig. 1 schematically shows the milling train for rolling rolling stock,
Fig. 2 shows flow chart,
Fig. 3 shows possible bulk temperature and distributes,
Fig. 4 shows the tangent plane (Scheibe) that another possible bulk temperature distributes,
Fig. 5 shows surface temperature distribution,
Fig. 6 and 7 shows flow chart,
Fig. 8 and 9 shows formula,
Figure 10 shows flow chart,
Figure 11 shows formula,
Figure 12 to 14 shows flow chart.
The specific embodiment
Below in conjunction with flat-rolled part 1 rolling being elaborated the present invention.This design is the most frequent applicable cases of the present invention.Yet on principle, the present invention can be used for rolled piece 1 arbitrarily, and for example rod rolled piece, tubular rolled piece or type are pressed (profiliertes) rolled piece.
According to Fig. 1, milling train has a plurality of mill stands 2 for rolling flat-rolled part 1.Flat-rolled part 1 is successively by these mill stands 2.Each mill stand 2 of milling train has roll 3.Roll 3 comprises working roll at least, often also comprises other roll, for example backing roll or-except backing roll-intermediate calender rolls.
The quantity of the mill stand that illustrates 2 of milling train is pure exemplary.Minimum is only to have a unique mill stand 2.Also not compulsory in addition is that as illustrated in fig. 1, tape running direction x is identical all the time.Alternately, when milling train only has a unique mill stand 2 or two mill stands 2 only, what can commutate especially is rolling.
Flat-rolled part 1 rolling in milling train is strap-like member according to the figure shown in Fig. 1.Yet flat-rolled part 1, for example panel-like member or the slab that alternately, can relate to other.
Rolling mill design has computer 4.Computer 4 is designed to control the control computer of milling train.Computer 4 therefore subsequently-at least usually-be called as and control computer 4.Yet on principle, computer 4 relates to other computer, and it does not control milling train, also or does not fully connect milling train but only connect in other respects milling train.
But control the device that computer 4 is typically designed to software programming.Control the working method of computer 4 and determine by computer program module 5, this computer program module flows to control computer 4 through computer-computer-connection (not shown) or storage medium 6.Also to storage medium 6 stored with the machine readable form-at least with electronic form-computer program module 5.Storage medium 6 is designed to usb memory stick according to Fig. 1.Yet this design is pure exemplary.Any design of other of storage medium 6 is also possible, for example is designed to CD-ROM or SD storage card.
Control computer 4 and utilize computer program module 5 programmings.Computer program module 5 comprises machine code 7, and this machine code can directly be carried out by controlling computer 4.The processing of machine code 7 has been determined to control the working method of computer 4.Affect processing to machine code 7 by controlling computer 4, namely control computer 4 and carry out a kind of assay methods, elaborate this assay method below in conjunction with Fig. 2.Control the corresponding design that computer 4 utilizes the programming impact control computer 4 of computer program module 5.
Can be applicable on the principle of the invention in all rolls 3 of mill stand 2.The particularly importantly application in the working roll of mill stand 2.In addition, the present invention sets forth below in conjunction with the top working roll 3 of the 3rd mill stand 2 in Fig. 1.Yet this regulation is pure arbitrariness.The present invention can be applicable in each other roll 3 of each mill stand 2 in a similar fashion.
According to Fig. 2, control computer 4 and at first carry out the initialization of the bulk temperature distribution VT of observed roll 3 in step S1.In step S1, each node that the bulk temperature of observed roll 3 distributes-exemplarily is referring to the point shown in Fig. 3-be initialised with initial temperature.Initial temperature can-for example-be identical for all nodes, and corresponding to environment temperature ground, namely for example exist between 0 ℃ and 40 ℃.
As ground shown in Figure 3, can arrange like this node of bulk temperature distribution VT, although (that is to say on the direction of the rotating shaft of roll 3) namely in the axial direction and (that is to say on the direction perpendicular to the rotating shaft of roll 3) that in the radial direction bulk temperature VT is carried out the zone to resolve, yet (that is to say with the rotating shaft of radial spacing around roll 3) not on tangential direction bulk temperature VT is carried out zone parsing.Alternately, can be on all three directions (axially, radially, tangent line) bulk temperature is distributed carry out zone parsing.The tangent plane of the bulk temperature distribution VT that the pure such 3D region that exemplarily shows roll 3 of Fig. 4 is resolved.
Fig. 4 also additionally shows backing roll 8 and modeling thereof and flat-rolled part 1 and modeling thereof.The meaning that is modeled in category of the present invention of the peaceful rolled piece 1 of backing roll 8 is unimportant.Yet hot-fluid j importantly, if this hot-fluid mainly by observed roll 3 contact with flat-rolled part 1, this flat-rolled part by cooling device 9 cooling-exist-with by with backing roll 9 contact determine.There is the hot-fluid by radiation in this external less scope.Yet this hot-fluid can be left in the basket usually.
Hot-fluid j is defining heat flux distribution WT aspect its globality, in the axial direction with on tangential direction heat flux distribution is carried out the zone parsing.Also in the situation that bulk temperature distribution VT is not carried out the zone on tangential direction and resolve, also on tangential direction, heat flux distribution WT is carried out zone parsing.This exemplarily shows in Fig. 3 thus, i.e. bulk temperature distribution VT axial region in its surface is divided into single field (Felder) 10 on tangential direction.For each single field 10, a distinctive hot-fluid j can be set.
The zone parsing of bulk temperature distribution VT need not identical everywhere.Therefore for example radially resolution ratio (
) aspect possible be to arrange than near the resolution ratio meticulousr rotating shaft of roll 3 at the near surface of roll 3.Resolve if also on tangential direction, bulk temperature distribution VT is carried out the zone, more be similar to the rotating shaft of roll 3, resolve in the zone on tangential direction just can be always more rough in a similar fashion.Example: in three outermost layers (=ring) of bulk temperature distribution VT, have the spatial resolution (Ortsaufloesung) of 64 pixels (Element) on tangential direction.In three layers following, there is the spatial resolution of each 32 pixels on tangential direction.In three layers following, there is the spatial resolution of each 16 pixels on tangential direction, etc.The quantity of the layer that the spatial resolution of mentioning and spatial resolution are suitable for respectively can change naturally as requested.
If-except axial direction and radial direction-also on tangential direction, bulk temperature distribution VT is carried out the zone to resolve, surface temperature distribution, namely the temperature in the radially outermost layer of roll 3 is provided as the regional analytical function of bidimensional, in other words, corresponding local surfaces temperature is the function of axial location z and tangential position φ.Resolve if on tangential direction, bulk temperature distribution VT is not carried out the zone, surface temperature distribution is only to carry out the function that resolve in the zone on axial direction z.Surface temperature distribution T ' in the case corresponding to this roll 3, as the average surface temperature distribution T ' of the function of its axial location z.
Roll 3 in servicely is not in thermal balance rolling.Therefore must upgrade continuously bulk temperature distribution VT.In order to upgrade bulk temperature distribution VT, need bulk temperature distribution VT self on the one hand, need on the other hand to appear at the lip-deep heat flux distribution WT of roll 3.Therefore need single hot-fluid j(z,
), it is fed to axial location z and the tangential position of determining
Topping roll 3 is perhaps discharged by roll in this position by the surface of roll 3.In category of the present invention, be inadequate by mean time at this as hot-fluid j on tangential direction.What need or rather is in the axial direction and on tangential direction heat flux distribution WT to be carried out the zone parsing.
Possible is that heat flux distribution WT defines like this, and has been scheduled to control computer 4.Yet preferably there is step S2 to S4 shown in figure 2.
In step S2, control computer 4 receiving course parameter I.Process variable I relates to by roll 3 rolling rolling stocks 1.Process variable I is for example the parameter of the diameter of the width of rolled piece 1, " chemical composition (Chemie) " of rolled piece 1 (namely its material forms) and roll 3 on the one hand.For example the variable of the temperature, mill speed v, rolling force F, roll rotational speed n etc. of rolled piece 1 on the other hand.
In step S3, control computer 4 and determined surface temperature distribution according to bulk temperature distribution VT.-according to bulk temperature distribution VT whether on tangential direction to this surface temperature distribution carry out the zone resolve-only also on tangential direction, this surface temperature distribution is carried out zone parsing in the axial direction in the axial direction or not only.Be in columniform situation at the roll 3 that is used for rolling flat-rolled part 1, step S3 for example mainly comprises the radially outermost layer of selecting bulk temperature distribution VT.Do not resolve in the situation that or not on tangential direction, bulk temperature distribution VT is carried out the zone, the temperature of measuring for outermost layer radially is corresponding to the mean temperature of carrying out in the axial direction the zone and resolving.The example of such temperature tendency is shown in Figure 5.
In step S4, control computer 4 and measured heat flux distribution WT according to process variable I and the surface temperature distribution of step S3.As already mentioned, on axial direction and tangential direction, this heat flux distribution WT being carried out the zone resolves.
In step S5, control computer 4 and upgraded bulk temperature distribution VT according to heat flux distribution WT and bulk temperature distribution VT by means of the temperature model of roll 3.On tangential direction, bulk temperature distribution VT is carried out the zone when (also) and resolve, carry out finding the solution the equation of heat conduction of three-dimensional in step S5.When on tangential direction, bulk temperature distribution VT not being carried out the zone parsing, at first measure hot-fluid j(z for each axial region on tangential direction,
) in the summation at corresponding axial location z place.After this solved the equation of heat conduction of bidimensional.These two equations are known and trusty to those skilled in the art.
Realize in the prior art the renewal of the bulk temperature distribution VT of breaker roll 3, in order to can measure the hot convexity of roll when the rolling flat-rolled part 1 of roll 3.This is also possible in category of the present invention, and carries out in step S6 possibly.Be not core content of the present invention yet measure hot convexity.
In step S7, control computer 4 at least one upper surface temperature T of mensuration ' '.Preferably, such this upper surface temperature T of mensuration of control computer 4 ' ', namely in the axial direction this temperature is carried out the zone and resolve.In the case-referring to Fig. 5-, determined corresponding temperature for corresponding axial location z, on this temperature appear at roll 3, at the some place that determines by corresponding axial location z, and corresponding point contacts with roll 3.The upper surface temperature T ' ' therefore-may provide for corresponding axial location z-the maximum temperature of roll 3.Alternately, also can provide relevant temperature a little less than this maximum temperature.
Below only the situation of processing is, the upper surface temperature T ' ' be to carry out the distribution that resolve in the zone on axial direction.This has caused improved result.Yet it is just enough to use a unique upper surface temperature on principle, for example at the roll center.
Possible is to control computer 4 and only measure upper surface Temperature Distribution T ' ' according to the bulk temperature distribution VT that upgrades.This is described in detail in conjunction with Fig. 6 after a while.Alternative may be to control computer 4 and measure upper surface Temperature Distribution T ' ' according to the bulk temperature distribution VT and the heat flux distribution WT that upgrade.This is described in detail in conjunction with Fig. 7 after a while.
In step S8, control computer 5 and measure the wearing and tearing d of roll 3 by means of wear model 11.Control computer 4 in the category of step S8 in the situation that the upper surface temperature T of measuring in considering step S7 ' ' wearing and tearing d measured.
In step S9, control computer 4 and take other measures.Control computer 4 and for example can provide the wearing and tearing d of mensuration to the operator 12 of milling train in the category of step S9.Also possible that, control computer 4, as shown in figure 2, consider the wearing and tearing d of mensuration in the category of measuring adjustable parameter S, these adjustable parameter affect the rolling of rolled piece 1.The adjustable parameter S that measures can act on this mill stand 2 that observed roll 3 wherein is installed.Alternately or additionally, the adjustable parameter S of mensuration can act on other devices of milling train, for example other mill stand 2.Other measures are also possible.Below at length this is inquired into.
In step S10, whether it should stop assay method to control computer 4 detections.According to the check result of step S10, control computer 4 and go to or do not go to step S2.
Resolve if also on tangential direction, bulk temperature distribution VT is carried out the zone, can only determine the mensuration of upper surface Temperature Distribution T ' ' according to bulk temperature distribution VT.This is described in detail in conjunction with Fig. 6 below.
According to Fig. 6, control computer 4 and select axial location z in step S11.In step S12, control computer 4 and selected the radially outermost pixel of bulk temperature distribution VT for the axial location z that selects.In step S13, control computer 4-for example-measure maximum temperature, this maximum temperature appear at bulk temperature distribution VT, in step S12 in selecteed pixel.Alternately, control computer 4 and for example can measure the mean value of that local temperature, this local temperature appears at roll 3 and contact with rolled piece 1 and begin and roll 3 contacts with rolled piece 1 between end.Other method of operating is also possible.Conclusive is that the temperature of mensuration is positioned near maximum temperature at least.In step S14, the temperature distribution that control computer 4 will be measured in step S13 is moved towards T ' ' to the upper surface temperature of the axial location z that is used for selecting, as corresponding temperature value.In step S15, whether it has carried out corresponding temperature measuring to all axial location z to control computer 4 detections.If not this situation of this result is controlled computer 4 and is got back to step 11, wherein control computer select another, not processed axial location z still so far.Otherwise, the method for operating of end Fig. 6.
Resolve if on tangential direction, bulk temperature distribution VT is not carried out the zone, must introduce bulk temperature distribution VT and heat flux distribution WT in order to measure upper surface Temperature Distribution T ' '.This is described in detail in conjunction with Fig. 7.
According to Fig. 7, the step S12 of Fig. 6 and S13 are replaced by step S21 to S24.The step S11 of Fig. 6, S14 and S15 remain unchanged.
In step S21, control computer 4 and measure contact angle α for the axial location z that selects.Contact angle α corresponding to this angle-referring to the explanation of Fig. 4-, contact with rolled piece 1 through this angle at the axial location z topping roll 3 of selecting.Depend on process variable, realize the mensuration of contact angle α such as the diameter of roll 3, rolling pass reduction (Stichabnahme), workpiece measurement etc.
In step S22, control computer 4 preferably according to this relational expression
t=α/ω (2)
Measure corresponding consistent t time of contact.ω is the angular speed of roll 3.Time of contact, t was therefore corresponding to this time, and at this time durations, the point that is positioned on axial location z of roll 3 contacts with rolled piece 1 when roll 3 rotation.
In step S23, to control computer 4 and measure at least one hot-fluid j, this hot-fluid occurs when roll 3 contacts with rolled piece 1.Control maximum, minimum of a value, mean value or other values that computer 4 for example can be determined at the hot-fluid j of this time durations appearance.
In step S24, control computer 4 and determine upper surface temperature on this axial location z now, be the analog value of upper surface Temperature Distribution T ' ' for the axial location z that selects.Control computer 4 according to for the effective average surface temperature of axial location z of selecting, measure in step S22 time of contact t and the hot-fluid j that measures in step S23 measure the upper surface temperature.Controlling computer 4 for example can be according to Fig. 8 according to this relational expression
Measure the upper surface temperature of the axial location z that is used for this selection.K adjusts coefficient.It for example has this value
ρ, λ and c
pDensity, thermal conductivity and the thermal capacitance of the material of roll 3.
(j(z,
)) in the situation that introduce the maximum hot-fluid j that occurs corresponding to the hot-fluid of measuring in step S23.
In order to implement step 8, i.e. the mensuration wearing and tearing d in Fig. 2, there are equally various possibilities.Elaborate these possibilities below in conjunction with Fig. 9 to 11.
Wearing and tearing d generally includes thermal wear component dT.This thermal wear component dT can-for example-according to Fig. 9 according to relational expression
dT(z)=dT(ε
p(T"(z)，TZ(z))，R，l) (5)
Measure.At this ε
pThe plastic elongation rate on the surface of roll 3, during it appears at the independent rotation of roll 3.Thermal wear component dT fundamental sum plastic elongation rate ε
pBe directly proportional, and mill length l is directly proportional, and and the radius R of roll 3 be inversely proportional to.Radius R is alternately be crushed or the non-loaded radius of roll 3.
According to corresponding upper surface temperature T ' ' (z) and preferably carry out in the axial direction that resolve in the zone, as namely to be used for corresponding axial location z other temperature T Z to realize determining plastic elongation rate ε
pThis also-be similar to the upper surface temperature T ' '-only process this situation following, namely in the axial direction other temperature T Z is carried out the zone and resolves.
It should (at least one) other temperature T Z can be the temperature aspect roll 3 surperficial.This for example relate on relevant axial location z mean temperature T ' (z).Preferably, the minimum temperature on relevant axial location z is the lip-deep temperature that appears at roll 3.Alternately, other temperature is the temperature that appears on the relevant axial location z of roll 3 inside.To this alternately, the temperature in the antermarginal layer that connects of application roll 3 or the temperature in core.
When also on tangential direction, bulk temperature distribution VT being carried out the zone parsing, preferably be introduced in the temperature of the surface of roll 3.Yet when on tangential direction, bulk temperature distribution VT not being carried out the zone parsing, this method of operating is also possible.Can be applied in equally in both cases the inner temperature that occurs of roll 3.
Usually according to these two temperature for the technical staff just cicada to plastic elongation rate ε
pMensuration, and described in detail in the professional paper such as the people such as P.G.Stevens that mention in beginning.
In addition, wearing and tearing generally include grinding loss component dA.The relational expression that this grinding loss component dA mentions according to beginning in the prior art usually
d=c·φ·α·l (6)
Measure.Possibly, can consider hot correlation in this relational expression indirect.In the case, wear factor c is not constant, but to time of contact t root be directly proportional.
Although last-mentioned method of operating causes the mensuration of grinding loss component dA is improved relatively with respect to prior art.But this method of operating is not still optimum.A kind of as making result significantly improve in the method for operating that describes in detail below in conjunction with Figure 10.
According to Figure 10, control computer 4 and measure thermal wear component dT in step S31.For example can carry out the mensuration to thermal wear component dT in the above as having illustrated.
In step S32, control computer 4-and may carry out in the axial direction the case hardness H that ground-mensuration roll 3 is resolved in the zone.Depend on the one hand roll 3 surfacing material behavior and depend on that on the other hand upper surface Temperature Distribution T ' ' realizes the mensuration of case hardness H.
In step S33, control computer 4 in the situation that the case hardness H of the roll 3 of measuring in being applied in step S32 measures grinding loss component dA.In step S34, control computer 4 by thermal wear component dT and grinding loss component dA are sued for peace to measure wearing and tearing d.
In order to measure grinding loss component dA(=step S33), control computer 4 and for example can according to the relational expression of Figure 11 utility function, wherein relate to case hardness H, mill length l and contact angle α.
Preferably, as shown in fig. 11, the temperature T and/or the material that have additionally related to rolled piece 1 in to the mensuration of grinding loss component dA form.As shown in fig. 11, controlling computer 4 for example can be according to temperature T and the maximum yield stress σ (Fie β spannung) of material composition measuring of rolled piece 1, and according to relational expression
dA＝(σ(T)，H(T″(z))，l，α) (7)
Consider yield stress σ when measuring grinding loss component dA.Grinding loss component dA is directly proportional to yield stress σ, mill length l and contact angle α in the case, and is inversely proportional to the case hardness H that measures.The temperature T of rolled piece 1 and/or " Chemie " are considered in the category of mill scale model (Zundermodellen), and its result affects the modeling of grinding loss component dA.
As already mentioned, preferably according to relating to the process variable I that is rolled by 3 pairs of rolled pieces 1 of roll, to realize mensuration to heat flux distribution WT with initial surface temperature distribution T ' acting in conjunction.Possible is, process variable I is the expection parameter of measuring in the mode of model supports, and it is given from external transmission and controls computer 4, referring to Fig. 1.Alternately possiblely be that process variable I is at the actual amount by detecting during 3 pairs of rolled pieces 1 of roll rolling, equally referring to Fig. 1.Mixed form is also possible.For example possiblely be that the process variable I of the expection that control computer 4 given in advance is measured in the mode of model supports is until a time point in the future.In the case, can utilize the actual amount of detection to calculate for the past, and be set out by the wearing and tearing d of such mensuration, complete prediction to the wearing and tearing d of needs expection in future according to the process variable I in directed expection in the future.This is at large at the application " Betriebsverfahren f ü r ein Walzwerk zum Walzen von flachem Walzgut mit Walzenverschlei β prognose " of submitting to simultaneously with the application (applicant's internal file number: describe in detail 201013425).Below in conjunction with Figure 12, this method of operating is described roughly.
According to Figure 12, control computer 4 and in step S41, bulk temperature distribution VT is initialized.This step S41 is corresponding to the step S1 in Fig. 2.
In step S42, control computer 4 and receive rolling pass layout data SP(or himself is measured).This rolling pass layout data SP-in addition-defined process variable I that the mode with model supports mentioned is measured, expection in the future.Step S42 is corresponding to the partial design scheme of the step S2 in Fig. 2.
In step 43, control the actual amount that computer 4 receives the operation of rolling, this process variable has illustrated and has passed through the rolling of observed 3 pairs of rolled pieces 1 of roll.Step S43 is corresponding to other the partial design scheme of the step S2 in Fig. 2.
In step S44, control computer 4 and measure actual convexity and moment wearing and tearing d according to the actual amount of step S43.Step S44 corresponding to the summary to the step S3 to S8 in Fig. 2, relates to the processing to the actual amount of step S43 substantially.
In step S45, to control computer 4 and measure adjustable parameter S, this adjustable parameter impact is rolling to rolled piece 1.As already mentioned, adjustable parameter S can affect observed roll 3 and/or affect other rolls 3 of other mill stands 2.
Possible is to control computer 4 and carry out in real time the method for operating of Figure 12 during rolling rolling stock 1.There is in the case step S46, wherein controls computer 4 and control milling train corresponding to the adjustable parameter S that measures.Alternately, control computer 4 and naturally also can carry out the method for operating of Figure 12 after rolling rolling stock 1.In the case can cancellation step S46.
In step S47, control computer 4 and measure for the prediction of hot convexity with wearing and tearing d.Step S47 is substantially corresponding to the execution of step S44, yet wherein with at step S44 on the contrary, do not assess the actual amount of the detection of the operation of rolling, but assessment rolling pass layout data SP.In step S48, depend on that the wearing and tearing d of the expection in future of measuring takes other measures in step S47.For example can begin roll changes.For example also can provide to the operator 12 of milling train the wearing and tearing prediction of mensuration.
In step S49, control computer 4 and check that the method for operating in Figure 12 is should no termination.According to the check result of step S49, control computer 4 and go in step S50, perhaps finish the method for operating in Figure 12.
In step S50, control computer 4 and check and whether given in advancely should control other rolling pass layout data SP of computer perhaps whether measured by this control computer.According to the check result of step S50, control computer 4 and rotate back in step S42, perhaps in step S43.
Above basically understands a kind of method of operating, and it is performed during by roll 3 rolling rolling stocks 1 in real time.Yet this is not need to force.As already mentioned, also can carry out this method of operating after rolling rolling stock 1.In the case, step 42 and S45 to S48 and step S50 have been cancelled according to Figure 13.This is alternatively existed step S51, wherein-sort out-provide the wearing and tearing d of each mensuration to the operator 12 of milling train according to thermal wear dT and grinding loss dA equally.
Same possible be, the method for operating of Figure 12 is adjusted like this, and namely this method of operating was performed before by roll 3 rolling rolling stocks 1.In the case can cancellation step 43 to S46.In addition, step S56 and S57 preferably are connected to step S47 in the case afterwards.In step S56, control computer 4 and measure the adjustable parameter S of needs according to the wearing and tearing d that measures in step S47.In step S57, control computer 4 and stored adjustable parameter S, thereby control milling train after this adjustable parameter is provided for.Can there be step S48 in addition.Alternately, can be both with its cancellation.It alternately can be preposition or be placed on step S56 and S57.
The present invention has plurality of advantages.Especially, rolling down time, namely optimised in the time that mounts and dismounts between roll 3.Also can often optimize the quality of rolling rolling stock 1.
Above-mentioned explanation only is used for setting forth the present invention.Protection scope of the present invention should only be determined by dependent claims on the contrary.
Claims (16)
1. the assay method of the wearing and tearing (d) of a roll (3) that is used for rolling rolling stock (1),
-wherein upgrade the bulk temperature distribution (VT) of described roll (3) by means of the temperature model of described roll (3) according to the heat flux distribution (WZ) in the appearance of the surface of described roll (3),
-wherein on the axial direction of described roll (3) and in the radial direction, the zone parsing is carried out in described bulk temperature distribution (VT) at least,
-wherein on the axial direction of described roll (3) and on tangential direction, described heat flux distribution (WT) is being carried out the zone parsing,
-wherein measure the described wearing and tearing (d) of described roll (3) by means of wear model (11),
-wherein in the category of described wear model (11)
--distribute (VT) and/or described heat flux distribution (WT) is measured at least one upper surface temperature (T ' ') according to the described bulk temperature that upgrades, at corresponding point and described rolled piece (1) period of contact, described upper surface temperature appears at the described some place that determines on the described surface of described roll (3), and
--in the situation that consider that the described upper surface temperature (T ' ') of described roll (3) measures the described wearing and tearing (d) of described roll (3).
2. assay method according to claim 1, is characterized in that,
-on the tangential direction of described roll (3), the zone is not carried out in described bulk temperature distribution (VT) to resolve,
The described bulk temperature distribution (VT) of-renewal has defined the average surface temperature that carries out in the axial direction resolving in the zone and has distributed (T '), and described average surface temperature distribution has characterized the average surface temperature of described roll (3),
-according to measuring corresponding time of contact (t) in the zone in the axial direction at the process variable (I) aspect the rolling described rolled piece of described roll (3) (1) with resolving, characterized the corresponding described of described roll (3) described time of contact and how long contacted with described rolled piece (1) during described roll (3) rotation, and
-according to the part that occurs at described roll (3) and described rolled piece (1) period of contact of the described average surface temperature (T ') of described roll (3), described heat flux distribution (WT) with measure described upper surface temperature (T ' ') described time of contact (t).
3. assay method according to claim 1, it is characterized in that, also on the tangential direction of described roll (3) to described bulk temperature distribute (VT) carry out zone and resolve, and only measure described upper surface temperature (T ' ') according to the described bulk temperature distribution (VT) of upgrading.
4. according to claim 1,2 or 3 described assay methods, it is characterized in that, described wearing and tearing (d) comprise thermal wear component (dT), and situation other in the described upper surface temperature of using described roll (3) (T ' ') and at least one, the surface temperature (T ') aspect described roll (3) the described surperficial mensuration of realization to described thermal wear component (dT) of getting off.
5. according to claim 1,2 or 3 described assay methods, it is characterized in that, described wearing and tearing (d) comprise thermal wear component (dT), and get off to realize mensuration to described thermal wear component (dT) in the situation of the described upper surface temperature of using described roll (3) (T ' ') and the internal temperature that draws in the inside of described roll (3).
6. according to the described assay method of any one in aforementioned claim, it is characterized in that, described wearing and tearing (d) comprise grinding loss component (dA), and get off to realize mensuration to described grinding loss component (dA) in the situation of the case hardness (H) of using described roll (3), and get off to realize mensuration to the described case hardness (H) of described roll (3) in the situation of the described upper surface temperature of using described roll (3) (T ' ').
7. assay method according to claim 6, is characterized in that, situation about forming at the temperature of additionally using described rolled piece (1) (T) and/or material gets off to realize mensuration to described grinding loss component (dA).
8. according to the described assay method of any one in aforementioned claim, it is characterized in that, according to the process variable (I) aspect the rolling described rolled piece of described roll (3) (1) and described roll (3), measure described heat flux distribution (WT) by the distribute initial surface Temperature Distribution (T ') of (VT) definition of the described bulk temperature that upgrades not yet.
9. assay method according to claim 8, is characterized in that, described process variable (I) is at least part of is the parameter of the expection measured in the mode of model supports.
10. according to claim 8 or 9 described assay methods, is characterized in that, described process variable (I) is at least part of is actual amount, and described actual amount is detected during passing through the rolling described rolled piece of described roll (3) (1).
11. according to 8,9 or 10 described assay methods in claim, it is characterized in that, carry out in real time described assay method during by the rolling described rolled piece of described roll (3) (1).
12. according to claim 8 or 9 described assay methods is characterized in that, are carrying out before described assay method by the rolling described rolled piece of described roll (3) (1).
13. according to the described assay method of any one in aforementioned claim, it is characterized in that, consider the described wearing and tearing (d) of mensuration in measuring the category of adjusting parameter (S), described adjustment parameter affects the rolling of described rolled piece (1).
14. computer program module, comprise machine code (7), described machine code can directly be carried out by computer (4), and by described computer (4), the execution of described machine code is produced such effect, namely described computer (4) carry out have according to the described assay method of any one in aforementioned claim assay method in steps.
15. a computer is characterized in that described computer designs like this, namely described computer carry out have the described assay method of any one according to claim 1 to 13 assay method in steps.
16. a milling train that is used for rolling rolling stock (1) is characterized in that described rolling mill design has computer according to claim 15 (4).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10174341.7 | 2010-08-27 | ||
| EP10174341A EP2422894A1 (en) | 2010-08-27 | 2010-08-27 | Method for determining the wear of a roller used to roll rolled goods |
| PCT/EP2011/058155 WO2012025266A1 (en) | 2010-08-27 | 2011-05-19 | Method for determining wear on a roll for rolling metal stock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103097046A true CN103097046A (en) | 2013-05-08 |
| CN103097046B CN103097046B (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180041458.6A Expired - Fee Related CN103097046B (en) | 2010-08-27 | 2011-05-19 | Be used for the assay method of the wearing and tearing of the roll of rolling rolling stock |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2422894A1 (en) |
| CN (1) | CN103097046B (en) |
| WO (1) | WO2012025266A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114492024A (en) * | 2022-01-25 | 2022-05-13 | 江苏沙钢集团淮钢特钢股份有限公司 | Roller wear prediction method for bar rolling based on mathematical model |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201900003501A1 (en) * | 2019-03-11 | 2020-09-11 | Primetals Tech Italy S R L | Gap control method and system in rolling mills |
| EP3851217B1 (en) | 2020-01-15 | 2022-07-13 | Primetals Technologies Germany GmbH | Improved roll model adaptation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4059794A (en) * | 1974-07-15 | 1977-11-22 | British Steel Corporation | Method and apparatus for monitoring pass alignment in rolling mills |
| 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 |
| JPH0365610A (en) * | 1989-08-03 | 1991-03-20 | Sumitomo Metal Ind Ltd | Method and apparatus for measuring shape on-line |
| JPH04197507A (en) * | 1990-11-28 | 1992-07-17 | Hitachi Ltd | Method for controlling shape of rolled stock |
| JP2000167613A (en) * | 1998-12-03 | 2000-06-20 | Nippon Steel Corp | Sheet rolling mill and method for controlling sheet shape |
| CN101158984A (en) * | 2007-11-08 | 2008-04-09 | 广州珠江钢铁有限责任公司 | Roller abrasion mathematical model optimizing method for improving CSP product quality |
| CN101633004A (en) * | 2008-07-24 | 2010-01-27 | 宝山钢铁股份有限公司 | Method for designing generalized observer in controlled cooling of thick plate after rolling |
-
2010
- 2010-08-27 EP EP10174341A patent/EP2422894A1/en not_active Withdrawn
-
2011
- 2011-05-19 EP EP11723400.5A patent/EP2595768B1/en not_active Not-in-force
- 2011-05-19 CN CN201180041458.6A patent/CN103097046B/en not_active Expired - Fee Related
- 2011-05-19 WO PCT/EP2011/058155 patent/WO2012025266A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4059794A (en) * | 1974-07-15 | 1977-11-22 | British Steel Corporation | Method and apparatus for monitoring pass alignment in rolling mills |
| 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 |
| JPH0365610A (en) * | 1989-08-03 | 1991-03-20 | Sumitomo Metal Ind Ltd | Method and apparatus for measuring shape on-line |
| JPH04197507A (en) * | 1990-11-28 | 1992-07-17 | Hitachi Ltd | Method for controlling shape of rolled stock |
| JP2000167613A (en) * | 1998-12-03 | 2000-06-20 | Nippon Steel Corp | Sheet rolling mill and method for controlling sheet shape |
| CN101158984A (en) * | 2007-11-08 | 2008-04-09 | 广州珠江钢铁有限责任公司 | Roller abrasion mathematical model optimizing method for improving CSP product quality |
| CN101633004A (en) * | 2008-07-24 | 2010-01-27 | 宝山钢铁股份有限公司 | Method for designing generalized observer in controlled cooling of thick plate after rolling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114492024A (en) * | 2022-01-25 | 2022-05-13 | 江苏沙钢集团淮钢特钢股份有限公司 | Roller wear prediction method for bar rolling based on mathematical model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103097046B (en) | 2016-05-04 |
| EP2595768B1 (en) | 2015-04-01 |
| EP2595768A1 (en) | 2013-05-29 |
| EP2422894A1 (en) | 2012-02-29 |
| WO2012025266A1 (en) | 2012-03-01 |
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