CN102883980A

CN102883980A - Integrated process for the control, centering and regulation of the camber of the metallic strip in process lines

Info

Publication number: CN102883980A
Application number: CN2011800226587A
Authority: CN
Inventors: S·马丁内斯; F·瓜里恩托
Original assignee: Tenova SpA
Current assignee: Tenova Technology Tianjin Co Ltd
Priority date: 2010-05-06
Filing date: 2011-04-20
Publication date: 2013-01-16
Anticipated expiration: 2031-04-20
Also published as: IT1399922B1; EP2566799A1; WO2011137988A1; CN102883980B; EP2566799B1; ITMI20100801A1

Abstract

An integrated process for the control, centering and regulation of the camber of a metallic strip in process lines wherein the strip (14) is passed over a centering group comprising a mobile frame (21) carrying one or more rolls (19) and which operates a rotation (beta) with respect to a fixed supporting frame (20) effecting a shift of a branch of the outgoing strip with respect to a branch of the ingoing strip, wherein the rotation (beta) of the mobile frame (21) takes place around an axis (B) tilted with respect to the plane on which the ingoing branch of the strip lies, which creates a steering angle (gamma) of the axis of the roll with respect to the perpendicular to the axis of the line by a rotation of a tilt angle (alpha) of the frames with respect to the plane perpendicular to the ingoing branch, wherein sensors (15, 16, 17) are positioned on the strip (14); arranged along the line and connected to an electronic control board (13) which receives the data of the advancing strip (position and camber) and, on the basis of a control algorithm, used by the controller.

Description

The control of sheet metal strip camber in the machining production line, the integrated approach to neutralizing and adjusting

Technical field

The present invention relates in machining production line integrated approach that the sheet metal strip camber is controlled, neutralization is adjusted.

Background technology

In the manufacturing line of sheet metal strip, one of them most important requirement is to keep band with respect to the line of centers in machining area " centering ".Obviously, the centering degree is higher, and then for example repeatable and accuracy rate will be higher for the parameter of processing, and for example wear and tear in other aspects and maintenance cost will reduce.In other words, the quality of final products and productive costs depend on the centering degree that can realize on the band of processing at maximum range.

For the above reasons, manufacturing line maker and associated component manufacturer be the system of the track of Focus Control band to a great extent always, i.e. research and development are used for proofreading and correct monitoring and the center support system of band position.

The track defective of the band of finding in actual conditions can be divided into two classes (or mixing situation of this two class): biasing, and namely the band axis is with respect to the line of centers sidesway of manufacturing line; And the deviation that is caused by camber, i.e. long radius of curvature lug boss and the deflection vertical with axis in horizontal surface.

From geometrical point and or rather from the metallurgy viewpoint, the defective of back is considered to the most dangerous.

In fact from geometrical point, correct equipment can so that the band translation is in order to be centered in each position of manufacturing line its position, still be proofreaied and correct the horizontal position (near alignment sensor) that usually is confined to band.On the other hand, the bending of motion band causes and is occurring mis-aligned (even staying in the situation in the plane identical with band) between manufacturing line axis and the band axis, and in these transient processes, deviation occurs between protrusion rate and effective rate; Therefore, this defect propagation is outside correct equipment.In fact, form snakelike or sinuous phenomenon, this propagates along whole manufacturing line.This obviously causes error in processing (for example, vertically cutting, deposition process or rolling rolling), this also can obviously affect the quality of final products.

From the metallurgy viewpoint, the snakelike part of formation inner at stove or in the band high-temperature area can cause plasticization, thereby affects the end of band, and this can produce the ripple vertical with its plane conversely.Excessive bending and huge correction interference effect can cause material yield, and sometimes cause defective for example at excessive extension or the crackle of edge, and this causes a part of coiled material to become waste product.In fact, in case it should be noted that and form and in the situation that not have fully correction, the camber meeting is so that all Downstream processings are more dangerous.

The aligning gear of extensive employing that can see is arranged along strip producing line, and for example be arranged in the exit of heat part, it is made of the one or more rollers that are assemblied on the frame that can rotate with respect to the spindle axis of advanced strip (even in the situation of carrying out according to limited mode).For the function that they apply, can be divided into the aligning gear with Types Below:

Pure proportional-type: namely, be applicable to by so that roller with respect to rotating with the residing parallel plane axis in band importation.Angle beta (referring to Fig. 1 a) (for example at Paradine patent US3774831 or US4322060) come so that the output of band with respect to importation motion (bias correction).This type can not be used for the input band, and the maximum correction amount is confined to the aligning gear mechanical trip relevant with roller diameter (that is if this system is made of two or more rollers, then being at axle base).Should be noted that, arrange that for different swivel pins this system's major part remains unchanged, as long as they are positioned at vertical with the input band and pass on the plane at manufacturing line center.This layout can be set up the effect that effectively prevents to the biasing fault quickly and safely.This corrective action is just carried out at the output band, if and axis is consistent with line of centers, the sine of diameter that then can be by considering roller, possible axle base (if this system is made of more than one roller), winding angle and β angle of inclination comes to calculate its amount according to quite simple mode.Like this, therefore can introduce the autocontrol method of band, but the correction that is not solely limited to export band and biased error.

Pure integrated (integrated) type: namely, be applicable to produce roller with respect to vertical with the plane of band importation and be arranged in the deflection angle γ (referring to Fig. 1 b) of the supercentral axis of manufacturing line; The pulling force that this type causes band strong asymmetry occurs between the motor side edge of manufacturing line and operating personal lateral edges.In the situation of band (especially for the band part from heat treatment section) thinner or that made by the lower material of resistance, this can cause material yield at thickness, and the possibility of result causes damaging or the mass property variation.At the patent JP7001022(Nishino of Somitomo Co., Ltd Ken) Fig. 6 in demonstrate the typical case of pure integrated-type aligning gear group, this figure demonstrates roller for the corrective action that is positioned at the camber on the upstream ribbon (importation).Should be noted that interference effect is not limited to input the band part, and owing to export " turning to " orientation of band part and the biasing that continues in the generation of output band part, perhaps in some cases, produce unusual stretching at the edge of band.This biasing must be proofreaied and correct by the ratio system that is positioned on this band portion, thereby has increased other parts for this manufacturing line, namely makes it complicated.The corrective action that should also be noted that " turning to " of being applied by integrated centring roll is not instant, and so that the effort of control system automation has been subject to the challenge of the oscillation action of band position.Sometimes, these effects are unstable, and therefore need to reduce at the middle needs of returning of centering regulating control, therefore affected its effect.

Ratio-integrated-type: these are above-mentioned two types combinations, and are the most extensive employings, because they can be proofreaied and correct in two bands parts (input and output).

From specifying for " pure " corrective system, the front can find out, obviously have from shown in the layout of these pins of the different axis of direction orientation produce the effect of mixing, namely can be divided into the overall behavior of pure ratio adjustment (by shown in the effective angle β) and integrated correction (by shown in the γ).

Based on these considerations of the cost of mechanical equipment and control system or complexity reduced may suitable structures selection.In fact, the selection of long employing is to realize by the movable frame that roller (1 or 2 or more roller) is housed on fixed frame and its.Movable frame produces round the rotary motion trace with respect to the axis of inputting band flat inclination α partly, thereby has and the parallel plane rotating vector component (referring to Fig. 1 c) of input band part and the component vertical with its plane.The combination of these two kinds effects (ratio and integrated) therefore normally by in the fixed mode so that rack inclining angle [alpha] (shown in Fig. 1 c) realize.Should be noted that in fact presently used all systems do not expect continuously change usually limit and angle [alpha] that stoped in development during Assembly line on trial.Therefore, can not regulate integrated effect for the stretching situation of web type, participation or material type and characteristic.

Therefore the selection of α is the compromise selection by Design of Production Line person, and (for example limited α value produces moderate correction possibility in the upstream always not to be applicable to condition into gate material, high alpha-value produces excessive stretching/distortion in material, and may cause edge stretching or material self to break).

At patent Posco KR20010042781(Ju Gap Sik) in provided the example of this structure, the working direction of wherein mentioning with respect to the input band tilts.

Summary of the invention

The defective that overall purpose of the present invention is mentioned above being to solve according to very simple, economic and practical mode in the prior art.

Another purpose is to provide a kind of advantageous centering method that makes up three kinds of known types, so that so that these defectives are reduced to minimum.

Another purpose is to provide a kind of method, and best centering is next to exist the camber of controlling and regulating band in the situation of various defectives in all types of strip producing lines to the method by carrying out.

In view of top purpose, according to the present invention, proposition has the band camber in manufacturing line of the feature of specifically noting and carries out integrated control, the method to neutralizing and regulating in included claim.

Description of drawings

To more clearly understand 26S Proteasome Structure and Function feature of the present invention and with respect to the advantage of prior art from the explanation that provides with reference to the accompanying drawings, these accompanying drawings also demonstrate the method that the band camber in manufacturing line that realizes according to the present invention is carried out integrated control, neutralization is regulated.

More particularly, in these accompanying drawings:

Fig. 1 a is the schematic plan view of seeing from above, demonstrates the pure ratio aligning equipment of existing technology;

Fig. 1 b is the schematic plan view of seeing from above, demonstrates the pure integrated aligning equipment of existing technology;

Fig. 1 c is the schematic plan view seen from above, demonstrates the compound type ratio of existing technology-integrated aligning equipment;

Fig. 2 is for the band camber in manufacturing line that realizes according to the present invention is carried out integrated control, the schematic block arrangement plan of method that neutralization is regulated.

The specific embodiment

The integrated approach that the band camber in manufacturing line that realizes according to the present invention is controlled, neutralization is regulated is made of three parts on the whole basically: with the position of 11 bands that schematically show 14 and the measurement assembly of camber; With the 12 centring roll groups that schematically show (for example being arranged on the one or more rollers in the frame); And with 13 control units that schematically show, be used for obtaining data, drive the state of moving element and record manufacturing line.

More particularly, in control system 11, the measurement assembly of band position is made of shape and the position analyzer of band 14, and it can limit how much states of band 14 in real time, in order to can detect the beginning of possibility defective and take necessary corrective action.

In the embodiment of indefiniteness, shape analyzer is as the monitored control system that comprises optical means, and wherein band 14 shows its position by intercepting the part light that is sent by light source.Be subject to the geometrical constraint of manufacturing line, light source is positioned at the detector front in order to obtain its curvature.Advantageously need at present at least two kinds of optical monitoring systems, for example in Fig. 2, schematically show and with 15,16 and 17 schematically show those.Also can adopt the induction type or the capacitance-type sensor 15 that in Fig. 2, schematically show out.

For example renewal and the more not traditional system based on " image processing " also is actv..In this case, be by image recognition substantially, as shown in Figure 2, adopt at least one pick up camera 16 or 17 and the algorithm that can from the frame that obtains, extract geological information carry out image recognition.Optionally, can adopt the equipment that is equipped with removable or fixed laser.Location for shape detection system needn't be restricted.Because the feedback time that reduces for the camber defective is relatively long, the regioselective of the system that obtains of ribbon shape (roller control system 18 17 before or after 16, perhaps in two positions) algorithm that adopts for control only has limited impact.

Dream up one group of centring roll 12 according to the present invention relevant with this first group 11, it has determined the position of band 14 and the machinery control of curvature.For this reason, in embodiments, roller 19 is designed to be assemblied on fixed frame 20 and movable 21 two kinds of frames of frame.Between these frames, with respect to the fixing reference frame 20 of manufacturing line with carry between the movable frame 21 of the roller 19 of determining control, be provided with active and passive component, such as hydraulic pressure or electromagnetic piston 22,23, ball bearing of main shaft (not shown) etc.These parts can be by simultaneously, automatically and continuously change the motion that traditional angle [alpha] and β guarantee to turn to frame, and this has equally determined integrated and proportional action as mentioned above.

The integration section of the control system that the hot rolling line that then leaves by heating furnace 24 with band 14 is relevant is made of the flow control valve 25 of one group of cooling fluid, and it can regulate for its width (between operating personal lateral edges and motor side edge) rate of cooling of band 14 according to the differentiation mode.Integrated machinery control (by introducing Non-constant stress at width) therefore by just an edge of band 14 is carried out optionally and prudent " stretchings " thus the band 14 in the exit that is positioned at cooling segment 26 carries out differentiation to be operated.In fact, calculate and to have introduced optionally distortion, (be pre-existing in and/or caused by current production cycle) recovery so that so that possible metallurgy or geometrical defect (partly) and remaining stretching, thus can obviously change the quality condition of final products.

In system of the present invention, design the Electronic Control Center 13 as this system core, the function below carrying out: in 31, obtain the conceptual data of the band of processing 14 and reception deviation data and obtain from the curvature data of system's 11 acquisitions at 33 places in 32; Calculate the control of proofreading and correct amount of interference and control roll group 12 (for for the interference of β-ratio, being expressed as 34, and for α-mixing integrated/be expressed as 35 for the modification in the ratio); And the automation system that will the information relevant with band to be dealt with in 36 sends manufacturing line 37 to.Specifically, this algorithm limits the ratio angle beta that is applied on the control cylinder 19 and the real-time change of integrated angle α based on the assessment (observing by monitored control system 11) to Offset 32 and curvature 33.The algorithm that is adopted by controller has with Types Below:

Correction for the proportional part among the β:

Up=Kp*Ep

Wherein Up is for the amount of interference of this corrective action on β, and Ep represents the positional error (being detected by sensor) of band, and Kp is dimensional parameters, and expression is to gain and the variation to β of deviation reading.

Similarly, for the integration section among the α:

Ui=Ki*Ei

Wherein Ui is for the amount of interference of described corrective action on α, and Ei represents the camber error (being detected by sensor) of band, and Ki is dimensional parameters, has shown gain and variation to α to curvature parameters.

In fact, for given positional error Ep=e, Up produces at β, the whole cumulative correction that equals to predict, that is:

Up=e*Kp

Therefore, existence must be used for calculating the camber error E i=e' of integrated correction (deflection angle γ), and this inclination alpha and β by reality calculates; For example must adopt " Ziegler-Nichols " method that gain-adjusted is proofreaied and correct camber fully for being lower than 1(), take altogether 50% to proofread and correct amount of interference, that is:

Ui=e'*Ki/2

In case carried out integrated correction (by proofreading and correct angle [alpha]), then regulating control is waited for " flight time " of calculating according to the region distance with highest temperature in the heating furnace and ratio meter, and it compares to reanalyse camber by the reading that will obtain and desired numerical value (initial value 50%) afterwards.

At this moment, controller action according to new parameter (current β, α and camber error, residual value Ei) and determined the amount of interference of Ui(on α) the recirculation of new numerical value carry out recirculation.

In hot rolling line, can adopt with 38 another group signals that represent optionally to change the deflection that is generally cooling fluid in the Three regions (peripheral operation personnel side, center side and external motor side) in those zones of band 14.This action preferably realizes by the winding-up flow that changes the cooling fluid that is blown at 39 places on the Three regions of cooling segment 26.

As mentioned above, this algorithm must consider that sensor and aligning gear are with respect to being arranged in the situation at furnace outlet place at aligning gear at heating furnace 24() have the zone of highest temperature or input the length (normal conditions that operate at cool region at aligning gear) of free band part, but the most significant aspect of this calculatings is the progressively property of interfering: acts on the part centring roll and proofreaies and correct except the unstable and dispersion response on its track, also applying excessive stress in strip edge fully.Should be noted that, from the energy aspect, integrated action is by so that the potential energy of system increases square amount effect that is directly proportional that becomes a deflection that applies with the modulus of elasticity of material, so it is very responsive for the difference variation (between the edge) in aspect track.From dynamic aspect, band fricton-tightly on roller by arriving new least energy situation, wherein in the identical situation of deflection angle γ, owing to the deflection ε on strip edge that is derived from " pulling force " the poor stress that produces between two edges and stretching σ are inversely proportional to the free-span distance length of input band part.

The response time that this system proofreaies and correct for " integrated " is not instantaneous, but mobile (for deflection angle) continues to increase (so term " integrated ") until angle " γ " oppositely changes.

Obvious this interference (especially for the furnace outlet aligning gear) is unsettled, but resilience between the similar level that is in respect to the manufacturing line center in the relative position of energy level.

In fact, the strategy that here provides is to set up than the camber of the input band of eliminating hot rolling line fully or for the required lower integrated γ in the input band position of cold belt material part and proofreaies and correct, thereby so that outgoing position can ideally be proofreaied and correct owing to so-called " ratio " effect (β rotation) by system.Can be by also being the fully correction that the interference effect that acts on a series of continuous accumulations on the cooling system obtains camber.Like this, can adapt whole correction time with the time of passing through of the camber that exists or caused by hot working circulation, thereby so that its correction becomes possibility.For fear of sinking or distortion dangerous for product occurring, except dynamical parameter, consider also to calculate the amount of each interference according to metallurgy.

Optional control method in use initially comprises pre-established correction parameter, and these parameters are derived from geometry and the component characteristic of band.Then come during the course of processing, to optimize these parameters by relatively actual and more desired behavior.Such method can be used for isolated operation control roll (that is, in rolling mill production line) and can be used in for example wherein also there is different cooling mechanisms in more complicated system except roller those systems (regulating the flow of cooling fluid).Consider the feedback signal in these hot working systems, this algorithm is based on such fact, namely according to the different flow of cooling fluid or strict cooling condition (adopted different cooling systems for example to atomize or the situation of vaporific gas under), the cooling gradient is larger, and then related fiber thermal contraction is higher.The result is that when improving cooling effect, realization tension force increases in heating furnace 24, and so tensile fiber.Can calculate or use the model with respect to final element to calculate in the correlativity of cooling off between gradient and the tensile fiber by analysis meter.Simulate the most complicated final air-circulation features by the computation model for final element or final accurate difference, so that by adjust to consider the concrete property of manufacturing line in the stage at shaft down.

For the important of control center 13 but not novel function is with computing machine and the information system of steelworks 17 interconnected, so that be in processing and the transmission under roller 31 in obtain the physics and chemistry parameter, obtain the explanation parameter of the processing of carrying out in 36, this may be equipped with the analytical calculation to shape defect.Also can implement to carry out with heat treatment furnace 24 and quenching part (not shown) the function of immediate data exchange.

Specifically, should be noted that, in rolling mill production line part (this does not comprise hot part), center support system is equipped with proportional action to add integrated effect (being determined by device 22 and 23), and the latter can be arranged on usually according to the primary sensor 15(from the position that is used for band 14 downstream of centring roll 12), from the position transduser (linear transducer that in common aligning gear, adopts) of frame and may the time can calculate other position transdusers 16 of camber of band 14 and 17 feedback signal is adjusted by specific electronic machine 40 or production line automation equipment 41 from being arranged to.Therefore according to the characteristic (thickness of material, width and yield point) of band 31 and measured camber with regulate integrated effect.

In including

hot part

24,26 manufacturing line part, corrective system is usually located at the exit of the cooling segment 26 of heat treatment furnace 24.Roller center support system 12 has proportional action (in 22) and adds integrated effect (in 23), and the latter can be according to from the position transduser (usually being arranged on the downstream of centring roll group) that is used for band 14, can adjust by the feedback signal 32 that specific electronic equipment set 40 or production line automation equipment 41 calculate other position transdusers of camber of band 14 and/or plane and camber measurement mechanism (for example 16 and/or 17) from the position transduser of frame and from being arranged to.

Characteristic (thickness, width and the yield point of the material under the service temperature of heating furnace that provides in 31) and measured camber (in 40) according to band are regulated integrated effect, in order to except and then obtaining the proportional action of operation in outlet band part after the centering motion shape of input band part is proofreaied and correct.Adopt suitable means (for example by avoiding producing distortion around roller, this meeting is so that load is even), can be in heating furnace 24 internal extended by turning to the differential stresses effect that causes.Like this, can be by directly utilize the plastic properties of high-temperature metal at heating furnace 24 inner defect correctings.Can find out from just now described, can further improve this effect by cooling unit 26 is suitably controlled.By adopting different intensity of cooling curve (with respect to band in the vertical and in the horizontal) to operate, therefore can be further so that in the stress state uniformization of heating in by 24 so that at least part of elimination camber defective (though it be pre-existing in or produce by identical heat treatment).

Below with reference to Fig. 2 of front the action principle of above-mentioned embodiment is provided example.

In this function, initial conditions is:

Aligning gear is equipped with roller 19(1,2 or multiple roll more is installed on fixed frame 20 and its) movable frame 21, movable frame 21 produce path of motion (adopt in the situation that other mechanisms obtain in this motion, round the axis B of Fig. 1 a rotate or round the instantaneou axis of rotation line A rotation of Fig. 1 c);

Its rotation axis of aligning gear (A of Fig. 1 c) has inclination angle (α) (angle on the plane that is rotated with respect to the plane vertical with the importation of band with movable frame is consistent) thereon with respect to the plane that partly is located thereon of input band;

Band 14 has the skew of X cm with respect to the line of centers on position transduser 15 and has the camber that radius of curvature is Y m (observing by sensor 16 and/or 17), thereby has determined minor face and long limit.

The therefore following effect (corresponding with the behavior of the integrated aligning gear of typical proportions) of the first of aligning gear:

According to by measuring system 11(15,16 and/or 17) this side-play amount that the measurement of carrying out, control unit 13 calculate the first ratio adjustment and will be expressed as angle beta sends actuator 22 to;

(employing is calculated as the side-play amount of X+ ε cm to the amount of spin β of frame 21 (round the rotation axis B of Fig. 1 a) to produce ratio adjustment, wherein ε considers because the other correction of the camber defective Y m of the output of band), this so that band with respect to sensor 15 centerings.Amount of spin β always will regulate continuously according to the position feed back signal of the band that leaves aligning gear (sensor 15), remains in the dimension limit of position (ex. ± 5mm) for example in order to will export the position of band;

Band 14 trends towards in the exit of aligning gear 12 is repositioned at self center (center of manufacturing line) on the sensor 15;

Because the inclination alpha (geometric data according to factory suitably calculates) of aligning gear 12, integrated effect (be equal to roller and turn over angle γ round the axis G of Fig. 1 b) begins simultaneously with proportional action on the importation of band 14, has therefore improved " gradeability " in two edges of band 14 self.

According to the present invention, the second effect of aligning gear is following carrying out also:

Because camber survey sensor (non-limiting examples can be the continuous one or more pick up cameras 16 with Class1 5 and/or 17 or 2 or more sensor) is measured the result who acts on by the geometry situation that adopts band;

According to new situation, the control algorithm of the optimization angle [alpha] that represents by the usefulness 42 that is used for the computer rack inclination angle changes the integrated effect that angle [alpha] are regulated aligning gear 12 by utilizing actuator 23, in order to proofread and correct the position of input band part.In calculating amount of interference, except defect level, the algorithm in 42 also will be considered the yield point of thickness and width and the material of band;

Accurately calculate the integrated interference of carrying out in order to operate in the importation with the required lower amount of the full recovery that is lower than shape defect.In this stage, system 13 reanalyses how much states (position and camber) of (by sensor 11) band 14, and practical function and effect by model prediction are compared.In situation about there are differences, if the camber of band and position in the dimension limit that allows, then keep the adjusting (angle [alpha]) that realizes, otherwise system 13 changes calculating parameters in order to fall within the desired dimension limit.

The 3rd of aligning gear acts on according to the present invention also following carrying out:

Because camber survey sensor (non-limiting examples can be the continuous one or more pick up cameras 16 with Class1 5 and/or 17 or 2 or more sensor) is measured the exercising result that carries out by the geometry situation of upgrading band;

If aligning gear is positioned at heat part (24 and 26) downstream, then calculate for the best condition that transmits the Differential loading (between the edge) that produces owing to the integration section of interfering at the hot material that is positioned at heating furnace 24 (and so plastics) with 43 algorithms that represent.For this reason, algorithm 43 is regulated the flow that passes nozzle 25 by signal 38 and is acted in cooling vessel 26, so purpose is to eliminate the cause that has produced the camber defective.

After having applied variation, system adopts new calculating parameter to carry out another and proofreaies and correct circulation.In fact, this circulation is from listed the first effect beginning here and repeatedly carry out until the band of processing finishes.

Therefore the present invention comprises the new system of integrated form for centering and/or control/adjusting band camber, and this can optimize and be applicable in fact all strips manufacturing line, all defect that can run into and all strips type of processing in steel mill in common production program.

The present invention includes proportional action with camber on-line measurement system (outlet band part partly is offset with respect to the entrance band) and integrated effect (effect of going forward one by one during roller turns to respect to input band working direction) aligning gear (having one or more rollers) and can be according to by the detected angle of bend of camber measurer and according to the electronic control system of the integrated actuating quantity of physical property (from the production line automation system) the adjusting center support system of material.

The hydraulic pressure of the inclination alpha by can changing the roller rotation axis or the adjusting that the electro-mechanical actuator carries out integrated effect are in order to can change ratio between integrated effect and proportional action by adjust manufacturing line according to the actual state of band.

The invention is characterized in that in order elasticity to represent its concrete application, the computational algorithm that it must be by can real-time continuous accurately calculating its interference is control angle β and angle [alpha] (and therefore also having γ) simultaneously.

In being equipped with the manufacturing line of heat treatment furnace, another feature of the present invention comprise adopt computational algorithm come to driven roller carry out simultaneously and synchro control (" gradeability " asymmetry that is caused by γ by utilization) and at the cooling step at stove exit place (by the variable of cool stream, this has controlled cooling, thereby so that set up the time of plastic deformation can be faster or slower).By adopting this group system, therefore can carry out controlled-deformation to band, this can be used for alleviating camber, thereby has avoided forming the metallurgy defective (having improved the quality condition of band) that the excessive deformation by the edge causes.

For reducing of camber amount, the result shows and especially exists defective to improve when aligning gear is positioned at hot portion downstream.Some improvement is due to the fact that, by attempt its frequency increase of the dispersiveness in the part of line downstream when closing stove.By adopting the α angle at computing value, realize excessive correction, and therefore behavior unstable (vibration between motor side correction and the correction of operating personal side).Because these strict performance constraint conditions, the result is especially effective.

Therefore realized the purpose in the specification sheets previous section, mentioned.

For the version of embodiment of the present invention also have material and assembly model naturally also from exemplify that explanation and non-limiting purpose demonstrate for pure in the accompanying drawings those are different.

Therefore protection scope of the present invention is defined by included claim.

Claims

One kind in manufacturing line the camber to sheet metal strip control, integrated approach to the neutralization adjusting, wherein band (14) passes through in the centring roll group, this centring roll group comprises movable frame (21), this movable frame carries one or more rollers (19) and rotates (β) with respect to fixing frames (20), thereby so that output band part partly is offset with respect to the input band, the rotation (β) of wherein said movable frame (21) is carried out round the axis (B) that the plane that is positioned at respect to band input part branch tilts, this by frame with respect to the Plane Rotation inclination angle (α) vertical with input band part and so that roller axis turns over deflection angle (γ) with respect to the vertical line vertical with the manufacturing line axis, wherein sensor (15,16,17) band (14) that is arranged on along production-line arrangement upward and with electronic control panel (13) is connected, this electronic control panel receives the data (position and camber) of the band that advances, and is used by the controller with following form based on control algorithm:

Correction for the proportional part of β:

Up=Kp*Ep

Wherein Up treats to act on amount of interference on the β for what be used for this correction, and Ep represents the positional error (being detected by sensor) of band, and Kp is dimensional parameters, and it represents described gain and deviation reading;

Integration section for α:

Ui=Ki*Ei

Wherein Ui is for the amount of interference of corrective action on α, and Ei represents the camber error (being detected by sensor) of band, and Ki is dimensional parameters, and its expression is to gain and the variation of the curvature parameters of α;

Wherein for given positional error Ep=e, Up produces at β, the whole cumulative correction that equals to predict, that is:

Up=e*Kp

Wherein have the camber error E i=e' that must calculate with it integrated correction (deflection angle γ), this calculates by actual inclination alpha and β and determines; Employing for example " Ziegler-Nichols " method is all proofreaied and correct camber with gain-adjusted for being lower than 1(), take altogether 50% to proofread and correct amount of interference, that is:

Ui=e′＊Ki/2

Wherein said algorithm calculates the correction amount of interference, act on the actuator (22 that is connected with the frame of being connected (21) with described fixing frames (20), 23) on, and in the situation of the manufacturing line with heat part, act on the cooled region (26) of band (14) of the hot portion downstream that is positioned at stove (24).
2. the method for claim 1, it is characterized in that, analyze shape at described sensor (15) upper along the band (14) of manufacturing line setting and that be connected with electronic control panel (13) by induction and/or electric capacity optical means, wherein said band (14) intercepts the part light that is sent by light source in order to obtain curvature.
3. method as claimed in claim 2 is characterized in that, described optical means is " image processing " type, and carries out image recognition by at least one pick up camera (16), and comprises from the extraction of the geological information in the frame that obtains phase place.
4. the method for claim 1 is characterized in that, described sensor (15,16,17) comprises three kinds of sensors of optics or induction or capacity type, and these three of defining the required band (14) of the curvature of following the tracks of described band pass through the position.
5. such as each or multinomial described method in the claim of front, it is characterized in that, described effect on cooled region is undertaken by one group of signal (38), be used for optionally changing cooling fluid in the especially distribution of Three regions (peripheral operation personnel side, center side and outer side) of the zone of band 14, the injection flow that is blown into the cooling fluid of (in 39) by changing described Three regions at cooling segment (26) is realized described change.
6. such as one or more described method in the claim of front, it is characterized in that, using the computer information system of steel mill (37) is that described control desk (13) is designed to interconnected, in order to just obtain in the chemistry of processed band (14) and the conveying of physical parameter (in 31) and the explanation parameter that (in 36) are processed in the exit, and this control desk can be calculated shape defect by analysis meter.
7. in manufacturing line, the sheet metal strip camber is controlled for one kind, integrated system to the neutralization adjusting, wherein band (14) passes through in the centring roll group, this centring roll group comprises movable frame (21), this movable frame carries one or more rollers (19) and rotates (β) with respect to fixed pedestal frame (20), thereby so that output band part partly is offset with respect to the input band, the rotation (β) of wherein said movable frame (21) is carried out round the axis (B) that the plane that the input part branch with respect to band is positioned at tilts, this by frame with respect to the Plane Rotation inclination angle (α) vertical with input band part and so that roller axis turns over deflection angle (γ) with respect to the vertical line vertical with the manufacturing line axis, wherein sensor (15,16,17) band (14) that is arranged on along production-line arrangement upward and with electronic control panel (13) is connected, this electronic control panel receives the data (position and camber) of the band that advances, and is used by the controller with following form based on control algorithm:

Correction for the proportional part among the β:

Up=Kp*Ep

Wherein Up treats to act on amount of interference on the β for what be used for this correction, and Ep represents the positional error (being detected by sensor) of band, and Kp is dimensional parameters, represents described gain and deviation reading;

Integration section for α:

Ui=Ki*Ei

Wherein Ui treats to act on amount of interference on the α for what be used for described correction, and Ei represents the camber error (being detected by sensor) of band, and Ki is dimensional parameters, and this has shown gain and variation to α to curvature parameters;

For given positional error Ep=e, Up produces at β, the whole cumulative correction that equals to predict, that is:

Up=e*Kp

And wherein have the camber error E i=e' that must be calculated by it integrated correction (deflection angle γ), this inclination alpha and β by reality calculates; Employing for example " Ziegler-Nichols " method is proofreaied and correct camber with gain-adjusted fully for being lower than 1(), take altogether 50% to proofread and correct amount of interference, that is:

Ui=e'*Ki/2

Wherein said algorithm calculates the correction amount of interference, act on the actuator (22 that is connected with the frame of being connected (21) with described fixing frames (20), 23) on, and in the situation of the manufacturing line with heat part, act on the cooled region (26) of band (14) of the hot portion downstream that is positioned at stove (24).