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
  • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
• • 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
  • B21B1/24—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 continuous or semi-continuous process
  • B21B1/26—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 continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
• • 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
  • B21B2265/00—Forming parameters
  • B21B2265/12—Rolling load or rolling pressure; roll force
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2271/00—Mill stand parameters
  • B21B2271/02—Roll gap, screw-down position, draft position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B2271/00—Mill stand parameters
  • B21B2271/06—Mill spring
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/16—Adjusting or positioning rolls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/16—Adjusting or positioning rolls
  • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
  • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
• • 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
  • B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
• • 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
  • B21B37/64—Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands
• • 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
• • 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
  • B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force

Definitions

• the invention relates to a method for thickness control during rolling, in particular during hot rolling with at least one roll stand, wherein u.a. the current, middle position of the setting cylinder of the roll stand and the cumulative rolling force of the same are taken into account.
• From DE 20 20 402 is a method for calculating the thickness G1 thin, hard workpieces after a Reduzier devisgang by a Reduzierwalzrange with opposite rolling surfaces and a measuring device for measuring the forces apart the surfaces, during the passage of the workpiece through the opposite rolling surfaces during a Reduziervorganges
• a signal is generated, which is a measure of the thickness G5, which is determined by the intersection of a suitable roll elongation curve and a suitable workpiece deformation curve for the reduction process
• b) a signal is generated which is a measure for a thickness G3 defined by the intersection of the measured force curve and the roll elongation curve
• a signal indicative of a calculated stretch error is generated by plotting the signal representing the uncertainty range as a function of the reduction predicted for the reduction pass, the rolling strain predicted for the reduction, and the relative error probability in both the
• a signal is generated which is a measure of the thickness G5 defined by the intersection of a suitable roll elongation curve and a suitable workpiece deformation curve for the reduction process
• a signal is generated which is a measure of a thickness G3 passing through the intersection the curve for the measured force and the roller extension curve is determined
• a signal is generated which represents a measure of an uncertainty region, which is determined by the difference between the thickness G5 and G3 signals
• a signal is generated, which is a measure of represents a calculated extension error in that the signal representing the uncertainty region is a function of the rolling extension predicted for the reduction pass and the relative error probability in both the predetermination of the thickness decrease and the elongation is changed
• a signal is generated which is a measure of the calculated thickness G1 by the signal representing the thickness G3 calculated strain error is added.
• the so-called Gaugemeter help used to determine the current strip thickness for the thickness control when Wa in the roll.
• the measured position S D s Sos the adjusting cylinder corrected by the calculated frame strain g (see also Figure 1).
• the framework strain g is calculated by means of the measured rolling force F D s, F O s and a framework expansion curve 1 / M G.
• the thus determined strip thickness is then compared with the thickness setpoint and compensated. For this process, apart from the measurements of position and rolling force, an exact framework model is required.
• the invention is therefore based on the object to improve a method of the type described above such that the above-mentioned disadvantages are avoided.
• This object is achieved according to the invention by minimizing the amount of skeleton expansion. This happens because at least one additional position measurement is carried out by determining position signals in the nearer region of the roll gap of the rolling stands. In particular, the position signals between the work rolls and / or the back-up rolls and / or the work roll chocks and / or the support roll chocks must be taken into account / determined.
• the advantage of the method according to the invention is that the position measurement contains a smaller amount of framework expansion. So only the roll flattening and the roll bending are to be considered. Other parts, such as the elongation of the uprights and the crossheads, need not be calculated.
• the method according to the invention leads to a more accurate determination of the strip thickness for hard grades and, especially during thin strip rolling, improves the dynamic behavior of the thickness control.
• the signals obtained can also be used for position regulation and / or for swivel control and / or for calculating the strip thickness and thus for regulating the strip thickness.
• Figure 2 is a flow chart for thickness control according to the invention.
• Fig. 1 is a flow chart for the known thickness control during rolling, in particular during hot rolling, shown.
• An example of a pair of work rolls AW and a pair of support rollers SW existing rolling stand W has an operating side OS and a drive side DS.
• a strip B is located between the pair of work rolls AW.
• the cylinder position of the operating side Sos and the cylinder position of the drive side S D s are determined and the current, mean cylinder position S AC T determined.
• the total rolling force F A c ⁇ is ER- averaging the rolling force operating side Fos and the rolling force F drive side D s determined.
• the gantry expansion g is calculated with the aid of the total rolling force F A c ⁇ and a gantry expansion curve 1 / M G.
• the actual strip thickness h A c ⁇ is determined by measuring the current, average cylinder position S AC T and the calculated gantry strain g.
• the actual strip thickness h A c ⁇ is compared with the strip thickness setpoint h REF and used for thickness control.
• the thickness controller supplies the position setpoint for the cylinder position control.
• the known thickness control according to the flowchart of Figure 2 is improved.
• the distance between the work roll chocks on the operator side S ROS and on the drive side S S RD is, for example, measured and then the average distance of the work roll chocks S R determined.
• the further determined value for the current, average cylinder position S A CT is compared directly with the cylinder position setpoint S REF .
• the scaffold module M R depends according to the invention on the selected position measurement.
• the position measurement position signals to be taken into account for the method, wherein at least one position signal is required, are provided between the work rolls AW and / or the backup rolls SW and / or the work roll chocks and / or the backup roll chocks determined.
• the framework strain to be taken into account in the method according to the invention is to be matched in each case to the location of the position signal obtained.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Metal Rolling (AREA)

Priority Applications (7)

Applications Claiming Priority (4)

Publications (1)

Family

ID=37198982

Family Applications (1)

Country Status (12)

Cited By (2)

Citations (5)

Family Cites Families (8)

• 2005
  • 2005-09-09 DE DE102005042837A patent/DE102005042837A1/de not_active Withdrawn
• 2006
  • 2006-07-21 TW TW095126619A patent/TW200709865A/zh unknown
  • 2006-07-24 US US11/990,529 patent/US20090031777A1/en not_active Abandoned
  • 2006-07-24 AU AU2006284201A patent/AU2006284201A1/en not_active Abandoned
  • 2006-07-24 MX MX2008002631A patent/MX2008002631A/es not_active Application Discontinuation
  • 2006-07-24 BR BRPI0615089-6A patent/BRPI0615089A2/pt not_active Application Discontinuation
  • 2006-07-24 WO PCT/EP2006/007249 patent/WO2007022841A1/de active Application Filing
  • 2006-07-24 CA CA002620000A patent/CA2620000A1/en not_active Abandoned
  • 2006-07-24 KR KR1020087003003A patent/KR20080037010A/ko not_active Application Discontinuation
  • 2006-07-24 EP EP06776361A patent/EP1919638A1/de not_active Withdrawn
  • 2006-07-24 JP JP2008527327A patent/JP2009505835A/ja not_active Withdrawn
  • 2006-07-24 RU RU2008111505/02A patent/RU2008111505A/ru not_active Application Discontinuation

Patent Citations (5)

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