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
  • B21B37/48—Tension control; Compression control
  • B21B37/50—Tension control; Compression control by looper control
• • 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
  • B21B37/48—Tension control; Compression control
  • B21B37/52—Tension control; Compression control by drive motor control
  • B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
• • 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
• • 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
  • B21B37/48—Tension control; Compression control
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
  • B21B39/08—Braking or tensioning arrangements
• • 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
  • B21B1/36—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 cold-rolling
• • 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
  • B21B2037/002—Mass flow control
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters

Definitions

• the invention relates to a cold rolling mill and a method for cold rolling metallic strip, in particular steel, with a single stand with means for adjusting a roll gap and with a reel device upstream of the cold rolling stand for uncoiling the strip and with a reel device downstream of the cold rolling stand for reeling the strip. of.
• WO 99/55474 describes a Steckel rolling mill for hot rolling with at least one reversing roll stand and upstream and downstream reels.
• a loop lifter is provided between the reels and the reversing roll stand, which provides actual values for tension control and mass flow control.
• such a Steckel rolling mill relates to a hot rolling mill and therefore not to a cold rolling process.
• the object of the invention is to provide a method for cold rolling and a cold rolling mill with a single stand which, despite changes in the strip thickness profile and higher strip speeds, have no problems with regard to the mass flow and / or the strip tension.
• This object is achieved by a cold rolling mill with the features of claim 1 and by a method with the features of claim 3.
• Advantageous further developments are described in the subclaims.
• a strip store for mass flow control and / or strip tension control of the rolling process in particular for flexible rolling, be arranged between the upstream reel device and the individual stand for cold rolling.
• the strip feeders arranged in front of the individual stand in the strip running direction compensate for the mass flow changes or strip speed changes caused by a change in the strip thickness or a change in the strip thickness profile during flexible rolling. This shows in particular the advantage that rolling with a changing strip thickness sequence is still possible even at higher rolling speeds.
• the speed changes due to the change in the strip thickness in the roll gap are greatest on the entry side of the stand, so that the strip store is provided according to the invention at least in the entry area. Since the disturbances due to the change in the course of the strip thickness, i.e. In the case of a flexible roller, which also has - but not so strongly - an effect on the outlet-side belt speeds, it is proposed according to a preferred embodiment to also arrange a belt store on the outlet side of the individual stand.
• the tape store is preferably a dancer role.
• a dancer roll or a dancer roll arrangement comprises a roll which can be set at a certain angle with respect to the band and can be acted upon with a certain force, so that a loop is formed in the band, the loop length of which changes with the position of the roll. In this way, more or less tape can be stored.
• a dancer roll in both the inlet and outlet area, which are advantageously identical in construction.
• FIG. 1 shows a system layout of an embodiment of a cold rolling stand proposed according to the invention in flexible cold rolling, each with a dancer roll in the inlet and outlet areas;
• Fig. 4 shows an overview of the strip thickness control loop in combination with the strip tension control and a compensation of the mass flow disturbances in flexible cold rolling with a single stand.
• FIG. 1 An overview of a cold roll stand 1, each with a band store 2, 3 in the inlet (4) and in the outlet area (5), each comprising a dancer roll 6, 7, shows Fig. 1.
• the coil 8 is wound using a Decoiler 9 decoiled and inserted into the roll stand 1 in the direction of the arrow. After passing through the individual stand 1, it is wound up by means of a second reel device 10.
• a dancer roll 6, 7 is provided, which are identical in construction and are shown in detail in FIG. 2 with their employment.
• the single roll stand 1 itself is composed of two support rolls 11, two intermediate rolls 12 and the work rolls 13, 14. Any other arrangement of rollers in a single stand can also be used.
• Between the Roll stand 1 and the dancer rolls 6, 7 can, for example, also have a marking device 15 arranged in the belt line on the outlet side (5).
• Fig. 2 shows the mechanics and the control of a dancer roll 6 in a flexible cold rolling.
• a loop is formed in the band 8, the loop length of which changes with the position of the dancer roll 6 or its angular position in relation to the roll 16.
• the exemplary embodiment shown shows a hydraulic adjustment 18 for the dancer roll 6.
• a force regulator 19 is assigned to the dancer roll 6.
• actual force values and actual angle values of the dancer roll 6 are tapped.
• these actual force values are fed to force controller 19.
• the target force values are not specified here, but are calculated from the tapped actual angle values and a specified target tension.
• the force control circuit gives a force correction value to the position 18, here a hydraulic piston-cylinder unit, of the dancer roller 6. A correction of the tension of the belt is achieved via the force correction.
• the actual angle value tapped at the dancer roll is also used to regulate the speed setting of the reel devices (9, 10) and thus to regulate the torque of the reel devices for mass flow control.
• the actual angle value and a predetermined target angle are given to an angle controller.
• An angle correction value is calculated depending on the result of the target / actual value comparison. This angle correction value is used to control the speed in the reel devices for mass flow control.
• An overview of this strip tension and mass flow control by means of the dancer rollers 6, 7 in the inlet and outlet areas (4, 5) of a cold rolling mill 1 is shown in FIG. 3.
• the belt tension control is based on the calculation of a target force for regulating the hydraulic adjustment of the dancer roller of the actual force, while the speed of the reel devices is regulated for mass flow control.
• the belt speed is entered as the setpoint. This is also given as the setpoint for roller speed control.
• the strip thickness control in flexible rolling is shown.
• the change in the roll gap and thus a change in the strip thickness curve over the strip length is known.
• a target strip thickness curve is thus specified.
• This setpoint of the strip thickness curve is used to pre-control the entry-side dancer roll.
• the change in the speed at which the strip enters the roll stand and the strip tension control required to maintain a constant strip tension are calculated from the target strip thickness curve. Due to the mass flow compensation, the inlet train can still be calmed down.
• the values for the target strip thickness profile are given to a thickness controller, which uses the actual strip thickness values, which are tapped on the entry and exit sides, to calculate correction values for the strip thickness and to pass these correction values on to a position controller, which controls the gap setting in the cold rolling mill.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Control Of Metal Rolling (AREA)
• Winding, Rewinding, Material Storage Devices (AREA)
• Preventing Corrosion Or Incrustation Of Metals (AREA)
• Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7691436

Family Applications (1)

Country Status (15)

Families Citing this family (29)

Family Cites Families (10)

• 2001
  • 2001-07-11 DE DE10133756A patent/DE10133756A1/de not_active Withdrawn
• 2002
  • 2002-06-20 TW TW091113465A patent/TW587965B/zh not_active IP Right Cessation
  • 2002-07-10 AT AT02767196T patent/ATE288798T1/de not_active IP Right Cessation
  • 2002-07-10 CZ CZ20033418A patent/CZ20033418A3/cs unknown
  • 2002-07-10 US US10/483,706 patent/US20040177666A1/en not_active Abandoned
  • 2002-07-10 DE DE50202231T patent/DE50202231D1/de not_active Revoked
  • 2002-07-10 EP EP02767196A patent/EP1406735B1/fr not_active Revoked
  • 2002-07-10 WO PCT/EP2002/007689 patent/WO2003008122A1/fr not_active Application Discontinuation
  • 2002-07-10 KR KR10-2003-7015711A patent/KR20040014541A/ko not_active Application Discontinuation
  • 2002-07-10 ES ES02767196T patent/ES2235086T3/es not_active Expired - Lifetime
  • 2002-07-10 RU RU2004103859/02A patent/RU2293616C2/ru not_active IP Right Cessation
  • 2002-07-10 JP JP2003513719A patent/JP2005500163A/ja not_active Withdrawn
  • 2002-07-10 CN CNB028140036A patent/CN1283380C/zh not_active Expired - Fee Related
  • 2002-07-10 CA CA002453297A patent/CA2453297A1/fr not_active Abandoned
  • 2002-07-10 BR BR0209768-0A patent/BR0209768A/pt not_active IP Right Cessation
• 2003
  • 2003-11-14 ZA ZA200308881A patent/ZA200308881B/en unknown

Non-Patent Citations (1)

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