Classifications

• • 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
  • B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
  • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
  • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
  • B21B1/34—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2263/00—Shape of product
  • B21B2263/04—Flatness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2263/00—Shape of product
  • B21B2263/04—Flatness
  • B21B2263/06—Edge waves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2273/00—Path parameters
  • B21B2273/04—Lateral deviation, meandering, camber of product
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2273/00—Path parameters
  • B21B2273/12—End of product
  • B21B2273/14—Front end or leading end
• • 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
  • B21B37/58—Roll-force control; Roll-gap control
• • 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
  • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips

Definitions

• the present invention relates to an operating method for a rolling train having at least one rolling stand for rolling a strip in a plurality of rolling operations
• the rolling mill executing this rolling process adjusts according to the transmitted mill stand settings and rolls the strip according to the determined Walzge ⁇ setup settings.
• the present invention further relates to a data carrier with a computer program stored on the data carrier for carrying out such a method. Also, the present invention relates to a computer with a Mas ⁇ sen appointment, in which a computer program is stored, so that the computer when the computer program a derar- term operational procedure executes. In addition, the present invention relates to a rolling mill with at least one rolling stand ⁇ for rolling a strip in several rolling operations, which is guided by such a computer. Finally, the present invention also relates to a tape which has been rolled in such a rolling mill, said rolling mill currency ⁇ rend rolling of the strip in accordance with such operation information model was operated.
• a critical process when rolling a strip is the threading of the strip into the mill stand or the threading out of the strip from the mill stand.
• the detection of the tensile stress distribution presupposes that the band is clamped in front of and / or behind the roll stand in which it is being rolled. Otherwise, there could be no train in the band.
• the approach of the prior art is therefore limited in particular when passing through the beginning of the tape and the tape end, since the tape in these two cases only one-sided, so either only in front of the rolling stand or only behind the rolling stand, but not in front of and behind the mill stand, can be clamped.
• the rule ⁇ circle is thus open at least on one side.
• the object of the present invention is to provide an operating method for a rolling train and the korres ⁇ pondierenden objects, by means of which also the beginning of the tape and the tape end can be rolled so that they do not or at least only slightly sideways ⁇ move.
• the computer also determines an outlet wedge which is expected during this rolling process in the strip as part of the rolling mill model for each rolling operation
• the rolling train has only a single Walzge ⁇ framework and the strip is reversibly rolled.
• the rolling train is designed as a multi-stand rolling train. In this case, each rolling process is carried out by another rolling stand. If one of the input parameters of the belt is an entry wedge expected during this rolling process and the computer determines the rolling stand settings and the expected run-out wedges one after the other, the operating procedure works particularly accurately and reliably. Because the outlet wedge of Walzvor ⁇ gangs in this case corresponds to the inlet of the subsequent wedge to the ⁇ sen rolling process rolling.
• the hardness of the strip should be taken into account as an important input parameter of the strip.
• the roll stand settings preferably include a roll gap wedge, a total rolling force and / or a Walzkraftdiffe ⁇ ence of the respective roll stand.
• the measured variable is recorded after the last rolling process. But it is also possible to detect the measured variable before the last rolling process.
• draw differences herangezo ⁇ can be gen, which are determined by their roles voltage measuring Differenzzuglooper or tape.
• the measurement sizes can also be recorded by means of flatness measuring devices or strip edge measuring devices.
• Very particularly reliable it is, however, when the Walzgerüsteinstel ⁇ settings for at least one rolling operation determined such that the strip, after this rolling operation edge waves with edge wave amplitudes has, and the measured quantity is determined from the edge wave amplitudes.
• the difference of the edge wave amplitudes is a good measure of train differences and thus also in the tape pre ⁇ existing discharge wedge.
• the last-mentioned procedure is particularly advantageous if the measured variable is detected before the last rolling operation and the edge waves are rolled out of the strip at the latest during the last rolling process.
• the measured variable is determined by means of an automatic optical evaluation of the position of the band edges, the position of the band center and / or the position of the centroid of the band.
• ⁇ sondere method of digital optical image analysis can be used.
• the operating method according to the invention is preferably carried out only in the draft-free state of the band.
• a closed rule ⁇ circle available, so that in this case the proper lateral guidance of the band can be ensured otherwise.
• FIG. 2 shows the rolling train of FIG. 1 from above
• FIG. 3 shows schematically a section through a roll stand
• a rolling train has a plurality of rolling stands 1 to 6.
• a rolling mill with six rolling stands 1 to 6 is shown by way of example.
• a belt 7 is rolled.
• the belt 7 is thus rolled in several rolling processes ge ⁇ , each rolling operation by another roll stand 1 to 6 of the rolling mill is performed.
• the rolling train is guided by a host computer 8.
• the host computer 8 has a mass memory 9 in which a computer program 10 is stored.
• the computer program 10 has been previously created and stored on a data carrier 11 in (exclusively) machine-readable form.
• An example of a suitable data carrier 11 is a CD-ROM.
• the computer program 10 is the host computer 8 via the disk 11 - or alternatively, for example, the Internet - supplied.
• the host computer 8 performs according to the programming by the computer program 10, the rolling mill in a manner which will be explained in more detail below.
• the band 7 is usually a metal band, in particular a steel band. It has - see FIG 2 - a tape length 1 and a bandwidth b, wherein the tape length 1 changes during Wai- zen. Furthermore, it has a band beginning 13 and a band end 14.
• the beginning of the belt 13 is gradually threaded into the individual rolling stands 1 to 6. Then, the band 7 is rolled in the individual rolling stands 1 to 6. Finally, the band end 14 is again threaded out of the individual rolling stands 1 to 6.
• the rolling of the belt 7 follows in each roll stand 1 to 6 from the threading of the strip beginning 13 in the respective rolling stand 1 to 6 and lasts until the threading out of the tape end 14 from the respective rolling stand 1 to 6.
• the belt 7 in the rolling stand 2 has an outlet wedge, the belt end 14 runs laterally away. This too is shown schematically (and exaggerated for reasons of illustration) in FIG.
• the host computer 8 is initially supplied with input parameters H, E, PB in a step Sl.
• the input parameters H, E, PB first of the strip 7 comprise the hardness H of the tape 7.
• a gate key E with which the tape 7 in the respective rolling stand 1 to 6 enters.
• PB include other parameters PB such as. B. the bandwidth b, the temperature of the belt 7, its thickness, the inlet ⁇ speed, etc. ..
• the master computer 8 determines based on a rolling mill model 16 in a step S2 for the first rolling process on the basis of the input parameters H, E, PB of the belt 7 rolling stand settings K, FG, FD for the first rolling process.
• the determined roll stand settings K, FG, FD comprise a roll splitting wedge K, a total rolling force FG for the respective roll stand 1 to 6 or the corresponding rolling operation and a
• Rolling force difference FD for the respective rolling process. Furthermore, the master computer 8 also determines an outfeed wedge A expected in this rolling process in the strip 7 in the step S2 for the first rolling process.
• the discharge wedge A of the first rolling operation corresponds to an expected wedge E for the next rolling process.
• the master computer 8 therefore checks in a step S3 whether another rolling operation is still to be carried out. If this is the case, he returns the expected run-out wedge A, which he has just determined, back to the rolling-mill model 16 as the expected entry wedge E for the next rolling process in a step S4. Furthermore, in step S4 it also adjusts the remaining parameters H, PB of the band 7, as far as this is necessary.
• the master computer 8 uses the rolling mill model 16 to determine the corresponding rolling stand settings K, FG, FD and the subsequent rolling process in succession for the second, third, etc. rolling operation. waiting spout wedge A. As a result takes into account the routing ⁇ computer 8 thus in the determination of an expected in a rolling operation spout wedge the expected A at the previous rolling operations outlet wedges A.
• the determined rolling stand settings K, FG, FD are transmitted by the master computer 8 to the rolling stands 1 to 6 carrying out the rolling operations in a step S5.
• Each of the rolling stands 1 to 6 therefore adjusts according to the transmitted rolling stand settings K, FG, FD, so that It can perform its associated rolling process and thereby rolls the belt 7 according to the determined rolling stand settings K, FG, FD.
• a detection device 17 is arranged. According to FIG 1 are even before and after each roll stand 1 to 6 corresponding Erfas ⁇ sungs wornen 17 is present.
• the detection means 17 detect a measurand M, which depends on the actual wedge of the belt 7 at the respective detection point. Depending on the detection point, the detection devices 17 therefore detect actual entry and exit wedges of the belt 7. These measured quantities M transmit them to the master computer 8, which receives them in a step S6.
• the master computer 8 supplies the acquired measured variables M in a step S7 to an adaptation device 18 for the rolling mill model 16 implemented within the master computer 8.
• the adaptation device 18 continues to be supplied with the expected run-out wedges A in step S7.
• the master computer 8 is therefore able to determine correction values KW for the rolling mill model 16 in a step S8 on the basis of the exit wedges A expected at the detection points and the measured variables M detected at the detection points and thus to adapt the rolling mill model 16 ,
• corresponding expected results can be obtained from the expected run-out wedges A. Measured variables or vice versa from the actual measured variables M corresponding actual run-out wedges are ermit ⁇ determined. In both cases, 18 corresponding sizes can be compared in the adaptation device.
• the rolling mill model 16 is therefore adapted gradually to the actual behavior of the rolling train so that progressively better presettings of the individual rolling stands 1 to 6 become possible.
• Rolling operations (or for the corresponding roll stand 1 to 6) whose rolling stand settings K, FG, FD have been determined by the host computer 8 such that the belt 7 after this Walzvor ⁇ gear or behind this rolling stand 1 to 6 edge waves 19, 19 '.
• the edge waves 19, 19 ' have edge wave amplitudes h, h'.
• the edge waves 19, 19 ' are formed at the exit of the strip beginning 13 at the lateral edges 20, 20' of the belt 7. They are retained, occurs to the band 7 th in the Next Tier ⁇ rolling stand 1 to 6 and Z is applied to train.
• An analogous process results at the exit of the
• run-out wedge is to be determined in another way, this can be done, for example, as will be explained in more detail below in conjunction with FIG.
• the detection device 17 is designed as a camera or the like, which is directed onto the belt 7 from above. If the beginning of the tape 13 or the tape end 14 are below the detection device 17, this captures an image and digitizes it. The digitized image is transmitted to the master computer 8, which automatically evaluates it by means of known optical evaluation methods. For example, an edge determination can take place. In this case, the measured variable M can be determined based on the position of the band edges 20, 20 '.
• each Erfas ⁇ sungsstelle according to a step S9 with respect to determined whether the tape 7 at this point exceeds home is present and if it is draft-free. Only in this case of the tape with respect to the beginning of the strip end 14 is upstream of the 13 jewei ⁇ time detection point, preferably relative to that of the respective detection site downstream rolling speed Jost corresponding to 1 to 6 to the operating method according to the invention controlled. Otherwise (step SLO), a kon ⁇ ventional tension control.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Metal Rolling (AREA)
• Train Traffic Observation, Control, And Security (AREA)
• Networks Using Active Elements (AREA)
• Power Steering Mechanism (AREA)
• Vehicle Body Suspensions (AREA)

Priority Applications (1)

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Publications (2)

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Country Status (7)

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• 2004
  • 2004-12-15 DE DE102004060342A patent/DE102004060342B3/de not_active Expired - Fee Related
• 2005
  • 2005-12-05 CN CN200580043221A patent/CN100581671C/zh active Active
  • 2005-12-05 WO PCT/EP2005/056460 patent/WO2006063948A1/fr active Application Filing
  • 2005-12-05 ES ES05819333T patent/ES2331805T3/es active Active
  • 2005-12-05 DE DE502005008159T patent/DE502005008159D1/de active Active
  • 2005-12-05 EP EP05819333A patent/EP1833624B1/fr active Active
  • 2005-12-05 PL PL05819333T patent/PL1833624T3/pl unknown
  • 2005-12-05 AT AT05819333T patent/ATE442919T1/de active

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