EP2988884B1 - Procédé et cage de laminage à froid d'un produit - Google Patents

Procédé et cage de laminage à froid d'un produit Download PDF

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Publication number
EP2988884B1
EP2988884B1 EP14719338.7A EP14719338A EP2988884B1 EP 2988884 B1 EP2988884 B1 EP 2988884B1 EP 14719338 A EP14719338 A EP 14719338A EP 2988884 B1 EP2988884 B1 EP 2988884B1
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EP
European Patent Office
Prior art keywords
roll
rolling
skin
transmission
work roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14719338.7A
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German (de)
English (en)
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EP2988884A1 (fr
Inventor
Michael Breuer
Kerstin SPILL
Markus Fischer
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SMS Group GmbH
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SMS Group GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/001—Convertible or tiltable stands, e.g. from duo to universal stands, from horizontal to vertical stands
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/06—Drives for metal-rolling mills, e.g. hydraulic drives for non-continuously-operating mills or for single stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling 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
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • 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
    • B21B2001/221—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 by cold-rolling
    • 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
    • B21B2001/228—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 skin pass rolling or temper rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • 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
    • B21B2265/00—Forming parameters
    • B21B2265/14—Reduction rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/02—Roll bending; vertical bending of rolls
    • B21B2269/04—Work roll bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/02—Roll bending; vertical bending of rolls
    • B21B2269/06—Intermediate roll bending

Definitions

  • the invention relates to a method for operating a roll stand for cold rolling of rolling stock.
  • the rolling stand comprises at least an upper and a lower support roll and an upper and a lower work roll, which span a roll gap.
  • a lower and an upper intermediate roll may also be provided between the work rolls and the support rolls.
  • the invention also relates to said roll stand.
  • Reduziergerüste have the task to reduce per stitch 30 to 80% of the thickness of the rolling stock. At these high degrees of deformation occur high rolling forces and rolling moments. Therefore, a roller cooling with high efficiency is necessary. Here are up to 10,000 l / min. per mill converted to cooling amount.
  • the work rolls in the reducing stand are of relatively smooth surface without special texturing.
  • the upper backup roller is on the upper intermediate roll and this in turn on the upper work roll on. If the intermediate roll is missing, as in the four-roll stand, then the upper support roll rests directly on the upper work roll.
  • the rolling forces are in the range of 10 to 20 MN.
  • the rolling moments are in a range of 100 up to 200 kNm.
  • a special thickness control is used, which can be operated both in the position control mode, as well as rolling force control mode.
  • the essential actuator of the thickness control during reduction are almost exclusively the adjusting cylinders of the support rollers and only in peripheral areas of the strip tension.
  • Reducing stands can be in six-roller or four-roller design, d. H. be formed with six or four rollers.
  • Reduzier STEM typically both work rolls are rotated to transmit a rolling torque on both work rolls.
  • Such reducers are known both for reducing iron metal and for reducing non-ferrous metal.
  • the only noteworthy difference between the operation of ferrous metal and non-ferrous metal reducers is the use of the appropriate cooling lubricant;
  • the cooling lubricant is a (number word) means with the two functions cooling and lubricating.
  • rolling oil is typically used as the cooling lubricant.
  • the rolling force and the rolling moment are in In comparison to a reduction operation very low, specifically, the rolling forces during the temper rolling range in a range of 1 to 4 MN.
  • the rolling torques are typically in a range of 0 to 20 kNm.
  • the applied amount of tempering agent is about 20 l / min. per side of the rolling stock at a significantly lower level compared to the reduction operation.
  • the main task of the tempering agent is essentially the cleaning of the rolling stock or the rolls. During the temper rolling operation, typically neither of the two work rolls is driven; instead, only the lower support roller is driven, thus transferring a rolling moment to it.
  • the rolling force can be applied either via the adjusting cylinder of the upper support roller; this presupposes, however, that the upper support roller rests either on the upper work roll or, if present, on the upper intermediate roll.
  • the upper backup roll may also be lifted from the upper work roll or, if present, from the upper intermediate roll. Then, the application of the rolling force in the skin pass through a suitable employment of the upper bending cylinder, which act either on the upper work roll or - if present - on the upper intermediate roll.
  • the known pure non-ferrous metal reducing stands are not suitable for combined operation, ie for an alternative tempering operation for non-ferrous metal, because the reducing stands are designed for rolling forces that would be too great for a nonferrous metal tempering operation.
  • the friction forces within the hydraulic adjustment are approximately proportional to the maximum force, that is, a pitch cylinder, which has been designed for high forces can not work due to its internal friction in the required accuracy at low rolling forces.
  • Reduziergerüsten usually two rollers, i.d.R. the work rolls driven to transmit the required rolling torque as evenly as possible in the nip.
  • Smallest differences in diameter between the work rolls lead to moment differences between the rolls, which, however, do not have a detrimental effect on the rolling result, because the high decreases compensate for the rolling stock, e.g. by shear effects, takes place.
  • this internal compensation can not take place because only near-product roll formations take place.
  • the rolling moments are so low that the drive of only one roller is sufficient.
  • the present invention seeks to further develop a known method and a known rolling stand for cold rolling of rolling material operable in a reducing or a temper rolling operation, that the quality of the rolling stock and the stability of the rolling conditions are improved in the temper rolling.
  • This object is achieved by the method claimed in claim 1.
  • This method is characterized in that the upper or the lower work roll is uncoupled from its drive device in the temper rolling operation. Neither the upper nor the lower support roller are driven in the temper rolling operation according to the invention.
  • the claimed method provides that the rolling stand can be operated as an alternative to the temper rolling in a mode of operation reducing operation for significantly reducing the thickness of the rolling stock.
  • a combi-scaffold which allows for the ironing of ferrous and non-ferrous metals and the reduction of ferrous metal and non-ferrous metal on a scaffold, offers distinct advantages, especially in financial terms compared to two separate scaffolds; H. a Reduziergerüst and a separate skin pass mill.
  • the claimed drive concept in which the two work rolls are rotationally coupled to each other in the temper rolling on rolling stock together. Even moments-trim, chattering, surface defects and / or unstable rolling conditions, as they typically arise in a positive coupling of both work rolls to the comb roller gear, are advantageously avoided by the claimed drive of only one of the two work rolls. Overall, the quality of the rolling stock is improved and the rolling conditions stabilized by the claimed drive concept in the temper rolling. Thus, the claimed method is particularly suitable for casting non-ferrous metal strip.
  • a first embodiment of the method according to the invention is in the tempering the upper support roller of the upper work roll or - if present - lifted from the upper intermediate roll and there is the application and adjustment of the rolling force by the action of the upper bending cylinder on the upper work roll or - if present - on the upper intermediate roll.
  • the lifting of the upper backup roll from the upper work roll or from the upper intermediate roll provided according to the first embodiment avoids the described problem of excessive rolling force when the backup roll rests.
  • the upper support roller may also rest on the upper work roll or on the upper intermediate roll; then, however, the said disadvantages persist in the fine adjustment of the tempering forces.
  • the method according to the invention provides that in the temper rolling operation the thickness of the rolling stock is regulated with the aid of a skin pass control loop to a predetermined constant nominal thickness, e.g. by suitable variation of the strip tension of the rolling stock or the rolling speed as manipulated variables.
  • the skin level control, d. H. Thickness control during skin pass requires that the rolling force must be kept constant in order to obtain a uniform impression of the roughness of the temper rolling on the strip. It should be possible no thickness jumps occur.
  • the method according to the invention advantageously provides for a regulation of the rolling force applied to the rolling stock with the aid of a rolling force control loop, the bending cylinders serving as actuators for the rolling force.
  • a position control loop is provided in order to keep the setting position of the work rolls constant.
  • Both the rolling force control and the position control must be done in real time if possible, which is why the step responses of the two control loops preferably last less than 80 ms.
  • the method according to the invention provides that, optionally, a flatness control loop can also be provided for regulating the flatness of the rolling stock.
  • the flatness control loop then comprises a flatness measuring device, z. B. a flatness measuring roller at the output of the rolling stand for detecting the actual flatness of the rolling stock.
  • the actual flatness measured in this way is compared with a predetermined desired flatness, ie the difference between these two flatnesses is formed and this difference is calculated as Flatness control deviation fed to a flatness controller, which generates a suitable actuating signal for an actuator, for example, the upper bending cylinder of the upper intermediate or work roll, in accordance with the flatness control deviation.
  • the bending cylinders are controlled such that the flatness at the outlet of the rolling stand ideally corresponds to the predetermined desired flatness.
  • the lubricant is circulated and prefiltered after its use and before its reuse or prior to its recirculation.
  • the lubricant is freed of tinsel particles that may be produced during the temper rolling operation.
  • the prefiltering is preferably carried out before a typically anyway carried out very fine filtering of the lubricant.
  • the minimum amount is ideally such a small amount that is completely consumed during the temper rolling in the nip, so that in the outlet of the rolling stand ideally no lubricant remains on the surface of the rolling and no lubricant runs off the side of the rolling stock.
  • This minimal quantity lubrication basically takes place alternatively to the recycling of the lubricant, as described in the previous paragraph. If, in the reality of minimal quantity lubrication, small residual amounts of lubricant nevertheless remain on the rolling stock, these residual quantities can, of course, still be circulated and reused after prefiltering.
  • the inventive method is provided for non-ferrous metal strip or ferrous metal strip as a rolling stock.
  • rolling oil is preferably used as lubricant, taking advantage of its lubricant function. Basically, rolling oil however, in all modes of operation, that is, both for reducing non-ferrous metal strip or ferrous metal strip, as well as for tempering non-ferrous metal strip or ferrous metal strip.
  • temper rolling rolls typically with a certain surface roughness
  • These temper rolling are advantageously cleaned during the breaks of the tempering operation by a high-pressure spray with the lubricant or with the aid of brushes.
  • the cleaning process has the advantage that the service life of the temper rolling specially roughened for the temper rolling is increased.
  • a rolling stand according to claim 11 This solution is characterized in that the torque transmission device has at least one coupling device and an associated control device for uncoupling the upper or the lower work roll from the at least one drive device during the tempering operation.
  • the advantages of this solution correspond to the advantages mentioned above with reference to the method described.
  • the rolling mill includes an upper work roll 120-1, a lower work roll 120-2, and an upper backup roll 110-1 and a lower backup roll 110-2.
  • the work rolls are arranged between the two support rolls. In rolling operation, the two work rolls clamp a nip 128 in order to cold-roll the rolling stock between them.
  • spray bars 195 are arranged at the level of the upper and lower work rolls 120-1, 120-2 for applying coolant and lubricant to the work rolls.
  • Associated with the roll stand 100 is a thickness control loop 150, a rolling force control loop 160, a position control loop 170 and / or a flatness control loop 180.
  • the mill stand 100 is associated with a lubrication and coolant circuit, which comprises means for collecting the running of the rollers coolant or lubricant, for filtering the used coolant and lubricant and for returning the cleaned coolant or lubricant to in particular the work rolls.
  • the recirculation is typically carried out with a circulating system 192.
  • the cleaning or filtering of the coolant and / or lubricant is typically carried out in a very fine filter 194.
  • this prefilter is additionally preceded by a prefilter 190, for Filter out of baubles from the coolant or lubricant, as obtained during the rolling of rolling stock.
  • This pre-filter 190 may, as in FIG. 1 shown to be located either in front of or behind a circulation system 192; in any case, it is arranged in the flow direction before the finest filter 194.
  • the drive of the work rolls 120-1, 120-2 is effected by at least one drive device 124, 124-1, 124-2 with the interposition of a torque transmission device 120 ', 120 ".
  • the torque transmitting device 120 has an upper coupling device 126-1, an upper drive spindle 122-1 and optionally an upper transmission gearbox for transmitting a torque from the upper drive device 124-1 to the upper work roll 120-1.
  • the upper drive spindle 122-1 between the upper work roll and the upper drive means 124-1 and the optional transmission gear 129-1 between the upper drive spindle and the upper drive means is arranged.
  • the upper coupling device 126-1 may be disposed between the upper work roll and the upper drive spindle and / or between the upper drive spindle and the upper transmission gear and / or between the upper transmission gear and the upper drive means, and / or is in the neutral position of the upper transmission gear educated.
  • the torque transmission device 120 has a lower clutch device 126-2, a lower drive shaft 122-2, and optionally a lower transmission gear 129-2 for transmitting torque from the lower drive device 124-2 to the lower work roll 120-2 ,
  • the lower drive spindle 122-2 between the lower work roll and the lower drive means 124-2 and the optional lower transmission gear 129-2 between the lower drive spindle and the lower drive means is arranged.
  • the lower coupling means 126-2 may be disposed between the lower work roll and the lower drive spindle and / or between the lower drive spindle and the lower transmission gear and / or between the lower transmission gear and the lower drive means, and / or is in the neutral position of the lower transmission gear educated.
  • the upper clutch device is shown in an open, that is, decoupled state, while the lower clutch device is shown in a closed, ie, coupled state.
  • the torque flow from the drive means 124, 124-1, 124-2 to the work rolls can be selectively interrupted by means of the coupling means. Possible are positive, frictional, magnetic or fluid-dynamic action principles in the coupling device.
  • the actuation of the switchable coupling device can be mechanical, electrical, electromagnetic, pneumatic or in any other construction.
  • the arrangement of the switchable coupling device can take place on or in the comb-rolling gear, within the spindle, or on the roll neck.
  • FIG. 1 This in FIG. 1 four-roll mill 100 shown can be operated in a skin pass mode; the associated configuration of the rolling stand 100 is in FIG. 1 illustrated schematically.
  • the two support rollers 110-1, 110-2 are not driven in the tempering.
  • upper bending cylinders 140 can be seen, which act on the drive side AS and on the operating side BS on the upper work roll 120-1.
  • the two bending cylinders 140 each apply half a bending force F / 2 to the upper work roll 120-1, this action of the bending force causes a negative bending of the upper work roll.
  • the upper support roller 110-1 is lifted off the upper work roll 120-1.
  • the significantly lower rolling force in the tempering operation compared to a reduction operation is expressly desired in the temper rolling operation, because in the casting operation it is not the thickness reduction but only the imparting of a surface roughness structure predetermined by the work rolls in the form of temper rolling on the surface of the rolling stock.
  • the rolling force applied to the rolling stock in the temper rolling operation is additionally defined by the bending force additionally applied by the two bending cylinders 140 on the operating side BS and the drive side AS of the rolling stand.
  • the bending cylinder With the help of the bending cylinder, it is possible to define an operating point for the total rolling force acting on the rolling stock and, if desired, to keep this rolling force constant at a predetermined constant rolling force setpoint with the aid of the associated rolling force control loop 160. If the bending cylinders 140 are used in this way for the precise adjustment of the rolling force, this is also referred to as an extended bending system.
  • a special feature of the temper rolling operation according to the invention is furthermore that none of the two support rollers 110-1, 110-2 and also only one of the two work rolls 120-1, 120-2 is driven.
  • this is exemplified by the lower work roll 120-2. It is coupled via the closed lower coupling device 126-2 and the lower drive shaft 122-2 and optionally via the transmission gear 129-2 to the lower drive means 124-2, while the upper work roll 120-2 via the opened upper coupling device 126-1 of the associated upper drive means 124-1 is decoupled.
  • the thickness reduction of the rolling stock is significantly lower in the temper rolling operation than in a reducing operation.
  • a thickness control can also take place during a tempering operation; it is then typically referred to as a skin level control and performed by means of a skin pass control loop 150.
  • the tempering control loop controls the thickness decrease of the rolling stock during the tempering to a predetermined constant target thickness by suitable variation of the strip tension of the rolling stock or by suitable variation of the rolling speed.
  • the strip tension or the rolling speed serve as manipulated variables in the case of the skin pass control.
  • a position control loop 170 may be associated with the rolling stand for keeping the setting position of the work rolls constant. This can be detected metrologically either directly or indirectly by evaluating the positions of the bending cylinder 140 and be controlled via the bending cylinder as actuators. Both the control of the rolling force as well as the regulation of the position of the work rolls are preferably carried out in real time. For this purpose, the corresponding control circuits must be correspondingly fast; Preferably, their step responses are shorter than 80 ms.
  • a flatness control loop 180 may be associated with the rolling stand for controlling the flatness of the rolling stock.
  • the flatness control loop 180 comprises a measuring element 197, for example a flatness measuring roller for detecting the rolling stock at the outlet of the rolling stand for detecting there the actual flatness of the rolling stock.
  • This measured actual flatness of the rolling stock is compared by subtraction compared to a predetermined target flatness and the resulting from the difference formation flatness deviation is evaluated by a flatness controller, which in accordance with the flatness control deviation, a control signal to the actuators, e.g. the upper negative-acting bending cylinder 140, outputs for controlling the flatness to the predetermined desired flatness.
  • the rolling stand is designed for either cold rolling of ferrous metal strip or non-ferrous metal strip.
  • cold rolling non-ferrous metal strip so-called rolling oil or a water-oil mixture is used as a cooling lubricant.
  • the rolling stand is designed as a combination rolling stand, which can be operated either in a Reduzier sunnyness or in a skin pass mode.
  • FIG. 2 shows in contrast to FIG. 1 a six-high rolling stand. This is different from the one in FIG. 1 shown four-roll mill by an upper intermediate roll 130-1, which between the upper work roll and the upper backup roll, and a lower intermediate roll 130-2 disposed between the lower work roll and the lower backup roll.
  • FIG. 2 shows the operation of this six-high rolling stand in the skin pass mode in which the upper backup roll 110-1 is lifted from the upper intermediate roll 130-1.
  • the upper bending cylinders 140 now act not on the upper work roll 120-1, but on the upper intermediate roll 130-1. Otherwise, the structure of the roll stand and the operation or operation of the roll stand in the temper rolling correspond to the above with reference to FIG. 1 described information.
  • FIG. 2 shows a second embodiment of the torque transmission device 120 ".
  • the torque transmission device 120" includes, in addition to the clutch device 126, upper and lower drive spindles 122-1, 122-2 and a comb-type gear train 129 for transmitting torque from the single drive device 124 at least one of the work rolls 120-1, 120-2.
  • the comb-roller transmission is connected at its torque input to the single drive device 124.
  • the upper drive spindle 122-1 is between the upper work roll and the upper torque output of the comb-type roller gear
  • the lower drive spindle 122-2 is between the lower work roll and the lower torque output of the comb-rolling gear
  • the comb-type gear 129 is between the upper and lower drive screws and the drive means 124 arranged.
  • the coupling device 126 may be disposed between the upper work roll and the upper drive spindle and / or between the upper drive spindle and the comb-roll transmission and / or between the lower work roll and the lower drive spindle and / or between the lower drive spindle and the comb-roll transmission or is in the idle position formed of Kammwalzgetriebes.
  • the torque transmission device 120 'according to its first embodiment can not only be used as shown in FIG Fig. 1 shown to be operated in conjunction with a four-high stand, but also in conjunction with a six-high stand.
  • the torque transmission device 120 "according to its second embodiment can not only be used as in FIG Fig. 2 shown to be operated in conjunction with a six-high stand, but also in conjunction with a four-high stand.
  • the clutch devices are assigned a control device 127.
  • the control device makes it possible to open or close the clutch devices, depending on the operation of the rolling stand, either in the reduction mode or in the skin pass mode.
  • FIG. 3 Fig. 11 finally shows the necessary process steps for selecting either the reduce mode of operation or the skin pass mode in a combination mill which can alternatively run both modes of operation.
  • the framework parameters are first set to reduction mode.
  • the technological control loops such as the thickness control loop
  • the flatness control loop for which the available actuators are essential, are parameterized accordingly.
  • the technological control loops are activated both in skin pass mode and in reduction mode, but possibly parameterized differently.
  • the thickness control typically takes the form of a monitor or mass flow control. All rollers are integrated in the power flow. The adjustment of the rolling force and the position of the work rolls takes place in Reduzier réelle on the Anstellzylinder on the top of the upper intermediate roll or the upper work roll resting support roller act. If intermediate rolls are present, they are in contact with the work rolls. Accordingly, these adjusting cylinders are to be addressed in reducing operation as actuators in said control circuits.
  • both work rolls are rotationally driven by the torque transfer device 120 ', 120 "from the at least one drive device 124, 124-1, 124 - 2.
  • smooth-surfaced rolls are typically selected in the reduce mode essentially ready for rolling.
  • one of the two work rolls within the torque transfer device 120 ', 120' is uncoupled from the drive means by means of the coupler while the other work roll remains coupled. Subsequently, it is then checked whether the expected rolling force in the tempering operation is greater than a predetermined rolling force threshold F_Grenz or not. If this is not the case, the upper support roller is lifted from the upper work roll or from the upper intermediate roll.
  • the rolling force and the position control loop are configured so that the upper bending cylinder 140 are actuated as actuators. Thickness control in skin pass mode is typically done as a skin level control. If the rolling force to be set in the temper rolling operation is greater than the predetermined threshold value, the upper backup roll is placed on the upper work roll or the upper intermediate roll.
  • all framework parameters in particular all setpoint values for the control circuits activated in the skin pass mode, are set to suitable nominal values in Dressing operation set.
  • the setting of the framework parameters takes place in order to ensure the concrete penetration of the bending systems and the framework rigidity parameters required for the thickness control.
  • temper rolling rolls with a predetermined surface roughness are typically used in the temper rolling operation.
  • a minimum quantity lubrication or alternatively a lubricant circuit with the prefilter 190 may be provided in order to filter out the abrasion (tinsel) in the tempering operation from the lubricant and thus to relieve the main filter.
  • the rolling stand is then ready for rolling in the temper rolling operation.
  • the combination rolling mill according to the invention is designed to be converted from the Reduzierkonfiguration in the temperament configuration and vice versa.
  • the upper back-up roll may optionally be placed on and off the upper work roll, the upper and lower work rolls may be uncoupled and uncoupled to the drive means and the smooth reduction work rolls must be against the roughened skin-pass mill rolls be exchangeable.
  • the pre-filter for filtering baubles in the skin pass mode can also be removable when changing over to reduction operation, since this prefilter is typically dispensable in the reduction mode.

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

Claims (18)

  1. Procédé pour l'exploitation d'une cage de laminoir (100) pour le laminage à froid d'un produit à laminer (200),
    dans lequel la cage de laminoir présente au moins un cylindre de soutien supérieur et un cylindre de soutien inférieur (110-1, 110-2), ainsi qu'un cylindre de travail supérieur et un cylindre de travail inférieur (120-1, 120-2), qui serrent une emprise de laminage (128), et de manière facultative également un cylindre intermédiaire supérieur et un cylindre intermédiaire inférieur (130-1, 130-2), et
    dans lequel la cage de laminoir peut être entraînée de manière sélective dans un mode d'exploitation du type « exploitation par réduction » pour réduire l'épaisseur du produit à laminer (200) ou dans un mode d'exploitation du type «dressage par laminage à froid» ;
    caractérisé
    en ce que, dans l'exploitation du type dressage par laminage à froid, ni le cylindre de soutien supérieur, ni le cylindre de soutien inférieur ne sont entraînés ; et
    en ce que, dans l'exploitation du type dressage par laminage à froid, le cylindre de travail supérieur ou le cylindre de travail inférieur (120-1, 120-2) est découplé de son mécanisme d'entraînement (124, 124-1, 124-2).
  2. Procédé selon la revendication 1, caractérisé en ce que, pour l'exploitation du type dressage par laminage à froid, on soulève le cylindre de soutien supérieur (110-1) par rapport au cylindre de travail supérieur (120-1) ou - lorsqu'il est présent - par rapport au cylindre intermédiaire supérieur (130-1) ; et
    en ce que l'application et le réglage d'une force de laminage (F) ont lieu via l'intervention du cylindre de flexion supérieur (140) sur le cylindre de travail supérieur (120-1) ou - lorsqu'il est présent - sur le cylindre intermédiaire supérieur (130-1).
  3. Procédé selon la revendication 2, caractérisé en ce que, dans l'exploitation du type dressage par laminage à froid, on règle l'épaisseur du produit à laminer (200) à l'aide d'un circuit de commande du degré de dressage (150) à une épaisseur de consigne constante prédéfinie, via une variation appropriée de la traction de bande du produit à laminer ou de la vitesse de laminage, à titre de valeurs de réglage.
  4. Procédé selon la revendication 3, caractérisé en ce que la force de flexion (F) qui s'exerce à partir des cylindres de flexion (140) sur le produit à laminer (200) est maintenue constante à l'aide d'un circuit de réglage de la force de laminage (160) et/ou de préférence également la position d'approche des cylindres de travail (120-1, 120-2) est maintenue constante à l'aide d'un circuit de réglage de la position (170).
  5. Procédé selon l'une quelconque des revendications 2 à 4, caractérisé en ce qu'on règle la planéité du produit à laminer à l'aide d'un circuit de réglage de la planéité (180), via la mesure de la planéité réelle à la sortie de la cage de laminoir et en agissant de manière appropriée sur des éléments de réglage en fonction d'un décalage du réglage de la planéité sous la forme d'une différence entre une planéité de consigne prédéfinie et la planéité réelle mesurée.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé
    en ce qu'on soumet le lubrifiant, après son emploi et avant son utilisation renouvelée, à une filtration préalable.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé
    en ce que, dans l'exploitation du type dressage par laminage à froid, on n'utilise qu'une quantité minimale de lubrifiant pur.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé
    en ce que, en ce qui concerne le produit à laminer (200), il s'agit d'une bande de métal non-ferreux ou d'une bande de métal ferreux.
  9. Procédé selon la revendication 8, caractérisé en ce que, lors du dressage par laminage à froid d'une bande de métal non-ferreux faisant office de produit à laminer, on utilise de l'huile de laminage à titre de lubrifiant.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé
    en ce que, dans le dressage par laminage à froid, on utilise des cylindres de dressage par laminage à froid qui possèdent une rugosité superficielle, pour faire office de cylindres de travail (120-1, 120-2) ; et
    en ce que, de préférence, on nettoie les cylindres de dressage par laminage à froid au cours des pauses de l'exploitation du type dressage par laminage à froid via une pulvérisation sous haute pression avec le lubrifiant et/ou à l'aide de brosses.
  11. Cage de laminoir (100) pour le laminage à froid d'un produit à laminer, présentant :
    un cylindre de soutien supérieur et un cylindre de soutien inférieur (110-1, 110-2) ;
    un cylindre de travail supérieur et un cylindre de travail inférieur (120-1, 120-2), qui sont montés entre les cylindres de soutien et qui serrent une emprise de laminage (128) ;
    de manière facultative également un cylindre intermédiaire supérieur et un cylindre intermédiaire inférieur (130-1, 130-2) qui sont montés entre les cylindres de travail et les cylindres de soutien ;
    au moins un mécanisme d'entraînement (124, 124-1, 124-2) pour l'entraînement des cylindres de travail ; et
    un mécanisme de transmission d'un couple de rotation (120', 120") pour la transmission d'un couple de rotation dudit au moins un mécanisme d'entraînement aux cylindres de travail ;
    dans laquelle la cage de laminoir est réalisée sous la forme d'une cage combinée de réduction et de dressage par laminage à froid avec les modes d'exploitation alternatifs «exploitation du type réduction » pour la réduction de l'épaisseur du produit à laminer ou « exploitation du type dressage par laminage à froid » ;
    caractérisé
    en ce que le mécanisme de transmission d'un couple de rotation (120', 120") présente au moins un mécanisme d'accouplement (126, 126-1, 126-2) et un mécanisme de commande correspondant (127) pour le désaccouplement du cylindre de travail supérieur ou du cylindre de travail inférieur par rapport audit au moins un mécanisme d'entraînement (124, 124-1, 124-2) au cours de l'exploitation du type dressage par laminage à froid, dans laquelle les deux cylindres de soutien (110-1, 110-2) ne sont pas entraînés.
  12. Cage de laminoir (100) selon la revendication 11, caractérisée en ce que le mécanisme d'entraînement est prévu sous la forme d'un mécanisme d'entraînement supérieur (124-1) pour l'entraînement du cylindre de travail supérieur, et le mécanisme de transmission du couple de rotation (120') présente le mécanisme d'accouplement sous la forme d'un mécanisme d'accouplement supérieur (126-1), une broche d'entraînement supérieure (122-1) et, de manière facultative, un démultiplicateur supérieur (129-1) pour la transmission d'un couple de rotation du mécanisme d'entraînement supérieur (124-1) au cylindre de travail supérieur (120-1) ;
    dans laquelle la broche d'entraînement supérieure (122-1) vient se disposer entre le cylindre de travail supérieur et le mécanisme d'entraînement supérieur (124-1) et le démultiplicateur facultatif (129-1) vient se disposer entre la broche d'entraînement supérieure et le mécanisme d'entraînement supérieur ; et
    dans laquelle le mécanisme d'accouplement supérieur (126-1) vient se disposer entre le cylindre de travail supérieur et la broche d'entraînement supérieure et/ou entre la broche d'entraînement supérieure et le démultiplicateur supérieur et/ou entre le démultiplicateur supérieur et le mécanisme d'entraînement supérieur et/ou est réalisé sous la forme du point mort du démultiplicateur supérieur (129-1).
  13. Cage de laminoir (100) selon la revendication 12, caractérisée en ce que le mécanisme d'entraînement présente également, à côté du mécanisme d'entraînement supérieur (124-1), un mécanisme d'entraînement inférieur (124-2) pour l'entraînement du cylindre de travail inférieur (120-2) ; et
    le mécanisme de transmission d'un couple de rotation (120') présente en outre un mécanisme d'accouplement inférieur (126-1), une broche d'entraînement inférieure (122-2), ainsi que, de manière facultative, un démultiplicateur inférieur (129-2) pour la transmission d'un couple de rotation du mécanisme d'entraînement inférieur (124-2) au cylindre de travail inférieur (120-2) ;
    dans laquelle la broche d'entraînement inférieure (122-2) vient se disposer entre le cylindre de travail inférieur et le mécanisme d'entraînement inférieur (124-2), et le démultiplicateur inférieur facultatif (129-2) venant se disposer entre la broche d'entraînement inférieure et le mécanisme d'entraînement inférieur ; et
    dans laquelle le mécanisme d'accouplement inférieur (126-2) vient se disposer entre le cylindre de travail inférieur et la broche d'entraînement inférieure et/ou entre la broche d'entraînement inférieure et le démultiplicateur inférieur (129-2) et/ou entre le démultiplicateur inférieur et le mécanisme d'entraînement inférieur (124-2) et/ou est réalisé sous la forme du point mort du démultiplicateur inférieur.
  14. Cage de laminoir (100) selon la revendication 11, caractérisée en ce que le mécanisme de transmission d'un couple de rotation (120") présente également, à côté du mécanisme d'accouplement (126), une broche d'entraînement supérieure et une broche d'entraînement inférieure (122-1, 122-2), ainsi qu'une transmission de laminage à pignons (129) pour la transmission d'un couple de rotation du mécanisme d'entraînement (124) à au moins un des cylindres de travail (120-1, 120-2) ;
    dans laquelle la transmission de laminage à pignons est reliée à son entrée de couple au mécanisme d'entraînement unique (124) ;
    dans laquelle la broche d'entraînement supérieure (122-1) vient se disposer entre le cylindre de travail supérieur et la sortie de couple supérieure de la transmission de laminage à pignons, la broche d'entraînement inférieure (122-2) venant se disposer entre le cylindre de travail inférieur et la sortie de couple inférieure de la transmission de laminage à pignons et la transmission de laminage à pignons venant se disposer entre les broches d'entraînement (122-1, 122-2) et le mécanisme d'entraînement (124) ; et
    dans laquelle le mécanisme d'accouplement (126) vient se disposer entre le cylindre de travail supérieur et la branche d'entraînement supérieure et/ou entre la broche d'entraînement supérieure et la sortie de couple supérieure de la transmission de laminage à pignons et/ou entre le cylindre de travail inférieur et la broche d'entraînement inférieure et/ou entre la broche d'entraînement inférieure et la sortie de couple inférieure de la transmission de laminage à pignons et/ou est réalisée sous la forme du point mort de la transmission de laminage à pignons.
  15. Cage de laminoir (100) selon l'une quelconque des revendications 11 à 14, caractérisée
    par au moins un cylindre de flexion supérieur (140) destiné à exercer et à régler une force de laminage (F) dans l'emprise de laminage (128) en agissant sur le cylindre de travail supérieur (120-1) ou - lorsqu'il est présent - sur le cylindre intermédiaire supérieur (130-1).
  16. Cage de laminoir (100) selon l'une quelconque des revendications 11 à 15, caractérisée
    en ce que la cage de laminoir (100) présente un circuit de réglage du degré de dressage par laminage à froid (150) pour le réglage de l'épaisseur du produit à laminer dans le mode d'exploitation « dressage par laminage à froid », un circuit de réglage de la force de laminage (160) pour maintenir constante la force de laminage au cours de l'exploitation du type dressage par laminage à froid, un circuit de réglage de la position (170) et/ou un circuit de réglage de la planéité (180) pour garantir la planéité du produit à laminer.
  17. Cage de laminoir (100) selon l'une quelconque des revendications 11 à 16, caractérisée
    en ce que la cage de laminoir (100) est réalisée pour pouvoir être exploitée conformément au procédé selon l'une quelconque des revendications 1 à 10.
  18. Cage de laminoir (100) selon l'une quelconque des revendications 11 à 17, caractérisée
    par une barre de pulvérisation (195) pour de l'huile de laminage à l'entrée de la cage de laminoir pour le dressage par laminage à froid d'une bande de métal non-ferreux à titre de produit à laminer.
EP14719338.7A 2013-04-26 2014-04-25 Procédé et cage de laminage à froid d'un produit Active EP2988884B1 (fr)

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DE102013207690 2013-04-26
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PCT/EP2014/058503 WO2014174099A1 (fr) 2013-04-26 2014-04-25 Procédé et cage de laminage à froid d'un produit

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JP (1) JP2016531754A (fr)
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JP2016531754A (ja) 2016-10-13
KR101737945B1 (ko) 2017-05-19
WO2014174099A1 (fr) 2014-10-30
KR20150139571A (ko) 2015-12-11
DE102014207859A1 (de) 2014-10-30
CN105142810A (zh) 2015-12-09
EP2988884A1 (fr) 2016-03-02
US20160059283A1 (en) 2016-03-03

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