EP3566790B1 - Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern - Google Patents

Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern Download PDF

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EP3566790B1
EP3566790B1 EP18171365.2A EP18171365A EP3566790B1 EP 3566790 B1 EP3566790 B1 EP 3566790B1 EP 18171365 A EP18171365 A EP 18171365A EP 3566790 B1 EP3566790 B1 EP 3566790B1
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Prior art keywords
nominal
thickness
points
profile
corner
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German (de)
English (en)
French (fr)
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EP3566790A1 (de
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Andre Feldmann
Christian BRÜSER
Alexander EICK
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Muhr und Bender KG
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Muhr und Bender KG
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Priority to EP18171365.2A priority Critical patent/EP3566790B1/de
Priority to CN201980030962.2A priority patent/CN112105466B/zh
Priority to US17/052,568 priority patent/US11511328B2/en
Priority to PCT/EP2019/061410 priority patent/WO2019215045A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • 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
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2205/00—Particular shaped rolled products
    • B21B2205/02—Tailored blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B21B2261/043—Blanks with variable thickness in the rolling direction

Definitions

  • the invention relates to a method for dynamic roll gap control of a rolling device for the flexible rolling of metal strips.
  • a rolling device for the flexible rolling of metal strips.
  • one or more sections with variable profile thickness profiles are rolled into a strip material in succession and, if necessary, repeatedly.
  • the actual rolled using the first roll adjustment data The thickness profile of a section of a strip material to be optimized is measured behind the roll gap and this is also assigned characteristic actual corner points by automated profile recognition. Corrected roll adjustment data are determined from the deviations between the target corner points and the actual corner points ittelt and fed to the rolling process of a further strip section.
  • profile thickness gradients for strip material that is used as a raw material for various structural components in automotive applications are known.
  • the profile thickness gradients have different areas with constant thickness, those over areas with variable thickness and constant gradient are connected.
  • the requirements of the customers of flexibly rolled strip material, for example in terms of dimensional accuracy and costs, are increasing continuously.
  • the invention is therefore based on the object of providing a method for dynamic roll gap control that achieves high dimensional accuracy of the rolled strip material at high rolling speeds and is cost-efficient.
  • a method for dynamic roll gap control during the flexible rolling of metallic strip material is proposed, with the following steps: Establishing a target thickness profile with defined target corner points and profile sections lying between the target corner points, with two adjoining a target corner point Profile sections have different mean slopes; Flexible rolling of the strip material according to the target thickness profile; Measuring an actual thickness profile of the flexibly rolled strip material and determining actual corner points corresponding to the desired corner points; Comparing the nominal corner points with the corresponding actual corner points and determining corner point comparison values from the nominal corner points and the corresponding actual corner points; Regulating a roll gap as a function of the corner point comparison values; characterized in that target intermediate points are defined on at least a partial number of the profile sections lying between target corner points, and that actual intermediate points corresponding to the target intermediate points are determined from the measured actual thickness profile; and that the setpoint intermediate points are compared with the corresponding actual intermediate points and that intermediate point comparison values are determined therefrom, and that the regulation of the roll gap also takes place as a function of the
  • the method according to the invention has the advantage that deviations of the actual thickness profile from the target thickness profile can also be detected and corrected more precisely between the corner points, whereby a stable control loop with good control behavior can be achieved.
  • By defining the intermediate points local deviations between the corner points can only be determined.
  • the process can continue to operate stably while on the other hand, an evaluation of all measuring points of the actual profile would lead to a disproportionate increase in the demand for computing power and the process can become unstable.
  • a nominal thickness profile of strip material is derived on the basis of the requirements of the component to be produced from the strip material and is usually rolled repeatedly in the strip material.
  • a target thickness profile can be rolled into the strip material one after the other or a sequence of different target thickness profiles can be rolled.
  • the strip material is subsequently separated into blanks with the length of the nominal thickness profile, from which the desired components can be manufactured by means of forming processes.
  • the target thickness profile is defined in such a way that further digital processing is possible. This can be done continuously using equations, for example, or using quasi-continuous, discrete value pairs of thickness value and longitudinal position value.
  • the nominal thickness profile comprises at least a first profile section and an adjoining second profile section, which have different mean slopes.
  • a first profile section can be defined as a plateau, with at least a largely constant thickness, and a second profile section as a ramp.
  • Ramps have a variable thickness profile and a gradient profile on at least one of the upper side and the lower side of the belt.
  • the second profile section can have a constant slope. This embodiment can also be referred to as a linear nominal thickness profile.
  • the second profile section can have a variable gradient and / or merge continuously into the first profile section. This embodiment can also be referred to as a non-linear nominal thickness profile.
  • the target thickness profile of the strip material is characterized by the target corner points, while the target intermediate points serve as additional support points for optimizing the roll gap control.
  • the target corner points describe the transition points from a first section to a second section, in particular the transition from a plateau to a ramp or the transition from a ramp with a first gradient to a ramp with a second gradient.
  • the nominal intermediate points are arranged on a profile section of the nominal thickness profile between two nominal corner points.
  • the distance between a desired corner point and a desired intermediate point and between two desired intermediate points can be at least 5 mm in a longitudinal direction of the strip material. It has been shown that at high rolling speeds the distance between the characteristic points can be at least 5 mm in the longitudinal direction of the strip so that a stable control loop can be mapped.
  • Rolling speeds which enable cost-efficient series production of flexibly rolled strip material are generally above 20 m / min, the rolling speeds depending on the complexity of the nominal thickness profile to be rolled. At distances smaller than 5 mm, the smallest measurement and profile deviations are fed back to the control circuit.
  • intermediate points can therefore only be provided in sections with an extension in the longitudinal direction of at least 10 mm.
  • the maximum number of intermediate points on a section of the nominal thickness profile is similarly limited by the extent of the section in the longitudinal direction and the minimum distance between two points.
  • the number of target intermediate points between two target corner points can in a further embodiment be less than 20, in particular less than 6, in particular less than 3, in order to ensure efficient use of the computing power of the control system. This should also include the fact that individual profile sections of the nominal thickness profile have no intermediate points.
  • the nominal intermediate points can be evenly distributed over at least a partial number of the profile sections lying between the nominal corner points, ie the distance between the corner points of the profile section and the adjacent intermediate points and between the intermediate points is the same. This has the advantage that the position of the intermediate points is through sole specification of the number of intermediate points per section can be determined automatically.
  • the desired intermediate points can be distributed unevenly on at least a partial number of the profile sections lying between the desired corner points. This has the advantage that profile areas with high process dynamics can experience a higher resolution than profile areas with lower process dynamics and the computing power of the control is used efficiently.
  • the distance between the target corner points and the adjacent target intermediate points can correspond to the minimum distance in order to describe the transition area between two sections and the distance between the following target intermediate points each increase up to the middle of the section. In this way, an optimized dimensional accuracy of the rolled strip material can be achieved in the high-resolution areas, while computing power can be saved or higher rolling speeds can be achieved by reducing the total number of characteristic points.
  • the determination of the first roll adjustment data to achieve the target thickness profile can be done, for example, by rolling a calibration profile on an initial section or on separate strip material, by process simulation and based on empirical values.
  • the actual thickness profile of the strip material after flexible rolling can be recorded by means of a contactless thickness measuring system, on at least one measuring track in a longitudinal direction of the strip material, and by means of at least one strip length measuring unit.
  • the measured values are recorded at discrete measuring points.
  • the measuring points can be a few micrometers apart in the longitudinal direction, so that the thickness profile is mapped quasi-continuously.
  • the thickness measuring system and the strip length measuring unit can be integrated in a common system.
  • the measuring track in which the measurement of the thickness is made can be in the middle of the strip material, depending on the application be arranged or offset from this. It is also conceivable that the thickness measuring system measures the actual thickness profile in several measuring tracks.
  • the strip thickness can be determined on up to 20 measuring tracks.
  • the measurement tracks can be evenly spaced from one another. It is also conceivable that the distance between the measurement track is non-uniform and increases, for example, from the center in the direction of the edge of the strip material.
  • the at least one strip length measuring unit can generate trigger signals at equidistant intervals, by means of which a measurement of at least one thickness value is triggered by the thickness measuring system.
  • a filter for moving averaging can then be applied to the thickness values determined in this way in order to eliminate measurement outliers.
  • Non-contact thickness measuring systems can measure the thickness of the strip material quasi-continuously, i.e. at discrete points that are separated by a few micrometers, with a measuring spot being scanned around the respective measuring point.
  • the measuring spot of a measuring method is the area on the surface of the object to be examined that is taken into account for the determination of the measured value at a measuring point.
  • the measuring spot of the non-contact thickness measuring system can be smaller than 10.0 mm, in particular smaller than 1.0 mm, in particular smaller than 0.1 mm, in particular smaller than 0.06 mm.
  • laser-based thickness measurement systems meet this requirement for the measurement spot size and can therefore be used in one embodiment of the method.
  • Laser-based thickness measuring systems have a measuring spot size that is around a factor of 10 smaller than, for example, radiometric measuring methods. Due to the smaller measurement errors achieved in this way, in combination with the intermediate points, higher rolling speeds can be achieved with high dimensional accuracy.
  • the at least one strip length measuring unit can have an accuracy of at least 0.1% of the measured value, in particular at least 0.05%. This has the advantage that the measured thickness values can be assigned more precisely to the real longitudinal position and thus the actual corner points and the actual intermediate points in the longitudinal direction can be determined with greater accuracy.
  • the determination of actual corner points and actual intermediate points on the basis of the measured Actual thickness profile can be done with methods of pattern recognition, in particular profile recognition. There are a large number of mathematical procedures for this, which will not be discussed further at this point. Instead, reference should be made at this point to Chapter 7 of the aforementioned Hauger thesis.
  • the actual corner points determined in this way are compared with the corresponding desired corner points and the actual intermediate points are compared with the corresponding desired intermediate points and corner point comparison values or intermediate point comparison values are determined.
  • the roll gap is regulated as a function of the first roll adjustment data and the corner point comparison values or intermediate point comparison values.
  • the roll adjustment data can be recalculated as a function of the first roll adjustment data and the corner point comparison values or intermediate point comparison values either by means of formulaic relationships or on the basis of empirical values from a database.
  • an incoming strip thickness can be measured in front of the roll gap and the roll gap can also be regulated as a function of the incoming strip thickness in front of the roll gap.
  • the roll gap can be regulated in an area between a desired corner point and an adjacent desired intermediate point via an interpolation of the respectively associated corner point comparison values and intermediate point comparison values, or in an area between two adjacent desired corner points via a Interpolation of the respectively associated corner point comparison values take place, or take place in an area between two adjacent desired intermediate points via an interpolation of the respectively associated intermediate point comparison values.
  • Recalculated roller pitch data can either be completely determined for one section and only used at the beginning of the next recurring section. Or the recalculated roll adjustment data can be continuously determined and used directly in the process. Depending on whether a target thickness profile is rolled into the strip material one after the other or a sequence of different target thickness profiles is rolled, the dead time due to the distances between the thickness measuring system and the roll gap must be taken into account.
  • the comparison and correction values determined for the method described can also be used to control further process parameters of the flexible rolling, for example the regulation of the strip tension.
  • FIG 1 a process according to the invention for roll gap control during flexible rolling of strip material 11 is shown schematically with the aid of a flow chart.
  • Figure 6 an apparatus for performing the method is shown schematically. The Figures 1 to 6 are described together below.
  • a target thickness profile 1 is defined.
  • the requirements of the product for which the flexibly rolled strip material 11 'is to serve as the starting material serve as the basis for this.
  • the nominal thickness profile 1 can be formed either in sections using formulas or by a matrix with discrete value pairs from the parameters thickness value D and longitudinal position value L.
  • the target thickness profile 1 is defined in such a way that it can be further processed digitally. This can take place either in a separate computer unit 8, for example a CAD workstation, or directly in a process control unit 9.
  • a nominal thickness profile 1 comprises at least a first profile section 2 ', 2 "and an adjoining second profile section 3', 3", which have different mean slopes.
  • the mean slope is defined by the connecting line between the corner points of a profile section.
  • the first profile section 2 ', 2 " is designed in the present case in the form of a ramp with a variable thickness value D and the second profile section in the form of a plateau with a constant thickness value D.
  • the ramps 2', 2" can be linear and have a constant gradient or be non-linear and have a variable slope.
  • a setpoint corner point E The transition from a plateau section 3 ', 3 "to a ramp section 2', 2" and vice versa is described by a setpoint corner point E.
  • the nominal corner points E characterize the nominal thickness profile 1.
  • Figure 2 a section of a nominal thickness profile 1 with the associated corner points E1 to E5 (squares) for strip material 11 'to be flexibly rolled is shown as an example.
  • the first ramp 2 'between the corner points E1 and E2 has a negative slope, so that a reduction in the thickness of the strip material 11' can be found in this area.
  • a second ramp 2 ′′ with a positive gradient and an associated increase in thickness is formed by the section between the corner points E3 and E4.
  • the section of the nominal thickness profile 1 ends with a second plateau 3 ′′ between the corner points E4 and E5.
  • the target intermediate points S1 to S5 (diamonds) were also assigned to the target thickness profile 1.
  • Target intermediate points S serve as support points for optimizing the roll gap control according to the target thickness profile 1.
  • An intermediate point S1 or S5 is assigned to the first and second ramp 2 ', 2 "in the middle.
  • the target intermediate point S1 is exactly with one Minimum distance .DELTA.L_min from its associated target corner points E1 and E2.
  • the minimum distance ⁇ L_min between a desired corner point E and a desired intermediate point S or two desired intermediate points S means that the regulation of the roll gap can be carried out in a stable manner.
  • the minimum distance ⁇ L_min can be at least 5 mm.
  • the minimum distance ⁇ L_min becomes a target thickness profile 1 with a given length an upper limit for the number of Assigned target intermediate points S.
  • the three intermediate points S2 to S4 are assigned to the first plateau 3 'in a uniformly distributed manner. Depending on the length of the section, it would also be conceivable that the intermediate points are distributed unevenly.
  • the target intermediate points S2 and S4 could each be positioned closer to the nearest target corner point E2 or E3, taking into account the minimum distance ⁇ L_min, and the target intermediate point S3 could remain in the middle of the section.
  • the transition area between the first ramp 2 'and the first plateau 3' or the first plateau 3 'and the second ramp 2 "could be resolved more precisely.
  • the target thickness profile 1 is defined in a separate computer unit 8
  • the target thickness profile 1 is transmitted to the process control unit 9 in a further process step V11.
  • a first set of roll adjustment data is then determined from the target thickness profile 1. This can be done either on the basis of empirical values from databases or through simulation. It is also conceivable that the determination of the first Roll adjustment data takes place in a separate computer unit 8 and the first roll adjustment data are transmitted together with the target thickness profile 1 to the process control unit 9.
  • the process control unit 9 checks in a step VE1 whether the end of the incoming strip material 11 has been reached. When the end of the incoming strip material 11 is reached, the process is interrupted. If the end of the incoming strip material 11 has not yet been reached, the thickness profile of the incoming strip material 11 can be measured in an optional process step V30.
  • the optional process step V30 forms a matrix with the value pairs from the parameters thickness value D of the incoming strip material 11 and a longitudinal position value L, taking into account the distance Lv30 from the roll gap 12. As a rule, the incoming strip material 11 has a constant nominal thickness value DN and the measured thickness value shows only slight deviations from the nominal thickness value DN.
  • strip material 11 can run in with a variable thickness profile, for example if large jumps in thickness are to be achieved with several rolling strokes.
  • the thickness of the incoming strip material 11 can be measured by a combination of a thickness measuring system 6 and a length measuring device 17. These can be implemented analogously to the measuring systems 7, 18 of the process step V50, so that reference is made at this point to the statements relating to the process step V50.
  • the incoming strip material 11 is rolled in a process step V40 in accordance with the first roll adjustment data.
  • the incoming strip material 11 is passed through a roll gap 12 which is formed between a first work roll 4 'and a second work roll 4 ".
  • a four-high roll stand can be provided in order to realize small diameters of the work rolls 4', 4", wherein the work rolls 4 ', 4 "are each supported by a support roll 5', 5".
  • the roll gap 12 between the two work rolls 4 ', 4 " is set by an adjusting device 13, which is shown in FIG Figure 6 is only shown schematically.
  • the adjusting device 13 moves at least one of the two work rolls 4 ', 4 "vertically into a desired adjusting position.
  • the adjusting device 13 can in particular be controlled hydraulically and the desired adjusting position can be regulated via valves. Alternatively, however, it is also an electro-mechanical one Embodiment of the adjusting device 13 conceivable.
  • the process control unit 9 feeds the roller adjustment data to a regulator, which the regulator converts into a manipulated variable for the valves and in turn feeds them to the valves.
  • the controller can be hard-wired or simulated by the process control unit 9, the manipulated variable being fed to the valves via power electronics.
  • the actual thickness profile 14 of the outgoing strip material 11 ′ generated in this way is measured in a process step V50 behind the roll gap.
  • a matrix is formed with the pairs of values from the parameters strip thickness value D of the rolled strip material 11 ′ and the associated longitudinal position value L, taking into account the distance Lv50 from the roll gap 12.
  • an actual thickness profile 14 is shown.
  • the measurement can be carried out by a combination of a thickness measuring system 7 and a length measuring device 18.
  • a non-tactile, for example laser-based, thickness measuring system can be used as the thickness measuring system 7.
  • tactile thickness measuring systems to detect the thickness of the strip material 11 '.
  • the rolled strip material 11 ' is measured by the thickness measuring system 7 at measuring points that are only a few micrometers apart, so that the actual thickness profile 14 is mapped quasi-continuously.
  • a non-tactile, in particular laser-based, measuring device can also be used as the length measuring device 18.
  • tactile measuring devices As in Figure 3 For a discrete measuring point 15, the measuring inaccuracy for the position of a measuring point 15 is described by an area which is determined by the measuring accuracy of the thickness measuring system ⁇ DW and the measuring accuracy of the length measuring device ⁇ LPW.
  • the length measuring device 18 can therefore have an accuracy ⁇ LPW of at least 0.1% of the measured value, in particular at least 0.05%.
  • the measuring spot of the thickness measuring system 7 can also be smaller than 10.0 mm, in particular smaller than 1.0 mm, in particular smaller than 0.1 mm, in particular smaller than 0.06 mm.
  • a first thickness measuring system 6 is shown with a measuring spot extent DM that scans a target thickness profile 1 with a plateau section and a ramp at two different measuring positions P1 and P2.
  • the measurement spot 16 is located exclusively on the plateau section of the nominal thickness profile 1 and only detects thickness values Do that also correspond to the nominal thickness values of the plateau.
  • the measurement spot 16 is located exactly at a desired corner point. Due to the extent of the measuring spot 16, one half of the measuring spot 16 scans the plateau section with thickness values Do and the other half scans the ramp with thickness values between Do and Du. With linear averaging of the thickness values recorded by the measurement spot, a measured thickness value between the values Do and Du results. Since the thickness value of the target corner point is exactly Do, a first measurement deviation results due to the extent of the measurement spot 16.
  • a second thickness measuring system 6 'with a measuring spot extent DM' is shown that scans the target thickness profile 1 as before at the same measuring positions P1 and P2.
  • the measuring spot 16 ' is located exclusively on the plateau section of the nominal thickness profile 1 and only detects thickness values Do that also correspond to the nominal thickness values of the plateau.
  • the measurement spot 16 ' is located precisely at a desired corner point. Due to the extension of the measuring spot 16 ', one half of the measuring spot 16' scans the plateau section with thickness values Do and the other half scans the ramp with thickness values between Do and Du '.
  • the actual thickness profile 14 recorded by the process step V50 is subjected to a further process step V60 in which the actual corner points E 'and actual intermediate points S' are derived from the actual thickness profile 14 and the respective associated actual corner points E and Actual intermediate points S are assigned.
  • the actual corner points E ′ and actual intermediate points S ′ for the actual thickness profile 14 resulting from process step V60 Figure 3 shown as circles.
  • Pattern recognition methods can be based, for example, on linear regression, fuzzy logic and deviation optimization. Depending on the pattern recognition method used, it may be necessary to introduce boundary conditions, for example the definition of a minimum and a maximum slope.
  • the value pairs of the thickness value D and the longitudinal position value L of the target corner points E and target intermediate points S are compared with those of the associated actual corner points E 'and actual intermediate points S' and, if necessary, the comparison values or deviations of respective value pairs in the direction of the length position ⁇ L and in the thickness direction ⁇ D determined.
  • this is shown by way of example using the target corner point E2 or the actual corner point E'2.
  • the desired corner point E2 and the actual corner point E'2 have the distance ⁇ L2 in the direction of the length position and the distance ⁇ D2 in the thickness direction.
  • the procedure is analogous to that sketched for the deviations ⁇ L'1 and ⁇ D'1.
  • the Figure 5 shows the nominal thickness profile 1 Figure 1 and the actual thickness profile 14 Figure 3 , whereby the intermediate points S, S 'were not taken into account.
  • the advantage of the method according to the invention clearly shows.
  • the deviations of the actual thickness profile 14 from the target thickness profile 1 could be determined much more precisely with the method according to the invention, with simultaneous efficient use of the process computer power.
  • a second process decision VE2 can subsequently be provided, in which, on the basis of the comparison values determined, it is checked whether the roll adjustment data should be corrected.
  • the deviations of the incoming strip material 11 from the nominal thickness value DN determined in method step V30 can also be taken into account.
  • a threshold value can be defined for the comparison values of the thickness value ⁇ D, ⁇ D 'and the length position value ⁇ L, ⁇ L'. If the comparison values ⁇ D, ⁇ D 'or the comparison values ⁇ L, ⁇ L' are below the threshold value, the roll adjustment data for the respective point are not changed. If the threshold value is exceeded, the roll adjustment data is recalculated based on the deviations determined from process steps V70.
  • the deviations of the incoming strip material 11 determined in process step V30 can also be taken into account for the recalculation of the roll adjustment data.
  • the recalculation of the roll adjustment data can take place via experience-based correction factors or can be simulated in the process control unit 9.
  • the rolling pitch data can be recalculated for a profile section after the complete determination of the comparison values ⁇ D, ⁇ D ', ⁇ L, ⁇ L' and, after the recalculation has been completed, can be used to regulate the roll gap at the beginning of the next identically configured profile section.
  • the comparison values ⁇ D, ⁇ D ', ⁇ L, ⁇ L' are determined point by point and the roll adjustment data are recalculated point by point.
  • the recalculated roll adjustment data can then be used immediately for the ongoing rolling process of the profile section currently to be rolled. The process is carried out iteratively until the process decision VE1 leads to a stop of the rolling process due to the reaching of the end of the incoming strip material 11.
EP18171365.2A 2018-05-08 2018-05-08 Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern Active EP3566790B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18171365.2A EP3566790B1 (de) 2018-05-08 2018-05-08 Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern
CN201980030962.2A CN112105466B (zh) 2018-05-08 2019-05-03 用于在柔性轧制金属带时动态轧辊间隙调节的方法
US17/052,568 US11511328B2 (en) 2018-05-08 2019-05-03 Dynamic roll gap control during flexible rolling of metal strips
PCT/EP2019/061410 WO2019215045A1 (de) 2018-05-08 2019-05-03 Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern

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EP18171365.2A EP3566790B1 (de) 2018-05-08 2018-05-08 Verfahren zur dynamischen walzspaltregelung beim flexiblen walzen von metallbändern

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EP3566790B1 true EP3566790B1 (de) 2021-01-06

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CN112105466B (zh) 2023-03-07
US11511328B2 (en) 2022-11-29

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