EP4072747A1 - Warmwalzgerüst für ein warmwalzwerk und zum herstellen eines metallenen flachprodukts, warmwalzwerk sowie verfahren zum betreiben eines warmwalzwerks - Google Patents
Warmwalzgerüst für ein warmwalzwerk und zum herstellen eines metallenen flachprodukts, warmwalzwerk sowie verfahren zum betreiben eines warmwalzwerksInfo
- Publication number
- EP4072747A1 EP4072747A1 EP20830107.7A EP20830107A EP4072747A1 EP 4072747 A1 EP4072747 A1 EP 4072747A1 EP 20830107 A EP20830107 A EP 20830107A EP 4072747 A1 EP4072747 A1 EP 4072747A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- hot rolling
- stand
- work
- work rolls
- 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.)
- Granted
Links
- 238000005098 hot rolling Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims description 30
- 239000002184 metal Substances 0.000 title claims description 5
- 238000005096 rolling process Methods 0.000 claims abstract description 54
- 230000008859 change Effects 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 238000013461 design Methods 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000013000 roll bending Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- B21B31/203—Balancing 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
- B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
- B21B31/30—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal by wedges or their equivalent
-
- 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
- B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
- B21B2203/36—Spacers
-
- 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
- B21B2267/00—Roll parameters
- B21B2267/02—Roll dimensions
- B21B2267/06—Roll diameter
-
- 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
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
-
- 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
Definitions
- the invention relates to a hot rolling stand for a hot rolling mill and for producing a metal flat product, comprising an adjusting device which is provided to accommodate a pair of work rolls and to position work rolls of the pair of work rolls with the definition of a roll gap.
- the invention also relates to a hot rolling mill and a method for operating a hot rolling mill.
- starting products are formed.
- starting products are formed from a primary forming to an intermediate or final dimension in the hot state.
- the hot rolling mills can, for example, be connected directly to a continuous caster.
- a hot rolling mill for a flat product has an equalizing or heating furnace for heating and / or homogenizing the preliminary product to the desired forming temperature and further units.
- these units are then built up one after the other in a line to form a rolling train.
- these are
- Hot rolling stands transport lines, cooling devices, separating devices, heating devices and / or surface treatment devices.
- the rolling stock to be treated is reshaped by means of work rolls of a work roll pair, which is usually accommodated in a roll stand in combination with back-up rolls.
- a roll diameter range of the work rolls is usually determined with regard to the most varied of operating parameters of the hot rolling mill and also the parameters to be achieved for the one to be produced End product.
- JP S6313601 A discloses a roll stand which discloses a configuration change from a roll stand in four-high design to a roll stand in six-high design in order to be able to roll a broader range of thicknesses.
- To change the configuration both an intermediate roll set and a work roll set are introduced into the installation space of the work roll set, the work rolls having a relatively small roll diameter
- the invention is based on the task of realizing a hot rolling stand for a hot rolling mill, the hot rolling stand being able to be adapted as flexibly as possible to different finished products, process management, dimensions, materials and / or quality requirements, without an additional / further one To include the set of rolls in the stand.
- a hot rolling stand comprises an adjusting device which is provided to accommodate a pair of work rolls and to position work rolls of the pair of work rolls with respect to one another, defining a roll gap.
- the adjustment device of the hot rolling stand preferably comprises a roll stand in which the pair of work rolls is mounted and in which the work rolls of the pair of work rolls are supported by others Components of the adjusting device are positioned to one another.
- the pair of work rolls is composed in particular of two work rolls in the form of a lower work roll and an upper work roll, the individual work rolls being preferably guided in an associated guide element each in the assembled state in the roll stand.
- the respective guide element is in particular a respective chock in which the respective work roll is rotatably mounted.
- each of the work rolls of the work roll pair is in contact in the assembled state with at least one support roll on which the individual work roll can be supported in the course of a rolling process and the introduction of a corresponding deformation force into the rolling stock to be deformed.
- These support rollers are also preferably each guided in an associated guide element, which is preferably also a chock in each case.
- the “adjusting device” of the hot rolling stand is a device by means of which the work rolls of the work roll pair can be positioned with respect to one another, possibly indirectly via intermediate backup rolls, forming a desired roll gap.
- the adjusting device particularly preferably comprises further components which can include a wedge adjustment of a lower work roll of the work roll pair and / or a hydraulic adjustment of an upper work roll of the work roll pair and / or a work roll bend each of the lower and / or the upper work roll.
- the wedge adjustment, the hydraulic adjustment and the respective work roll bending can each have further individual components.
- the roll stand according to the invention is designed as a hot roll stand for use in hot rolling, ie for a rolling process of a rolling stock at a Temperature above the recrystallization temperature of a metal to be processed.
- a “roll gap” between the work rolls of the work roll pair is to be understood in the context of the invention as a distance between the work rolls.
- the invention now includes the technical teaching that the adjusting device is set up to accommodate different roller diameter areas with mutually corresponding work rollers in an exchangeable manner in the pair of work rolls.
- the adjusting device in the hot rolling stand according to the invention is designed to accommodate work rolls
- the work rolls can be exchanged in pairs while changing the roll diameter range.
- the work rolls installed in the hot rolling stand always correspond to one another with regard to the roll diameter range selected.
- the selectable (working) roll diameter ranges differ from one another insofar as the diameter deviation (significantly) goes beyond the usual roll grinding.
- Work roll pair an adaptation of the hot rolling stand to desired operating parameters can be made.
- This adaptation can be carried out through a suitable selection of the roller diameter range with regard to a respective product to be manufactured, a respective process control, respective dimensions, respective materials and / or respective quality requirements, so that the spectrum of the manufacturable products increases.
- This adaptation can be done faster and more easily without additional rollers having to be brought into the stand.
- the introduction of an additional set of rolls would lead to extensive further adjustments, e.g. the inlet guides, the drive train, but also the adjustment device, with a view to the dimensions of the rolling stock in a hot rolling mill. the z. B. must be carried out in a maintenance shutdown.
- a flexibly adjustable hot rolling stand can be realized with the invention, with the application of which a flexibly handleable hot rolling mill can also be realized by selecting a roll diameter range of the exchangeable work rolls with regard to the planned operating parameters.
- the hot rolling stand according to the invention can be adapted to the production parameters to be represented, such as the product to be manufactured, a respective process control, respective dimensions, respective materials and / or respective quality requirements, without compromising on this must be considered when choosing a roll diameter of the work rolls.
- the hot rolling stand is designed in such a way that the work rolls of the work roll pair can be interchangeably and can be assembled with different roll diameter ranges corresponding to one another.
- the individual work roll of the Work roll pairs are preferably realized at least two different roll diameter ranges.
- the work rolls of the work roll pair are always assembled with corresponding roll diameter ranges, ie the currently installed work rolls always have the same roll diameter range.
- the work rolls are exchanged preferably laterally and essentially perpendicularly, particularly preferably perpendicularly, to the longitudinal extent of a pass-through section
- a “roll diameter range” is to be understood in the context of the invention as a diameter range of the individual work roll which is characterized by a nominal roll diameter and a stock removal area.
- the stock removal area defines a permissible decrease in diameter of the respective roll over its service life.
- the roll diameter ranges that can be selected differ from one another insofar as the diameter deviation (significantly) goes beyond the usual roll grinding.
- the hot rolling stand is designed as a roughing stand.
- the hot rolling stand is designed in such a way that it is used within a hot rolling mill as a roughing stand for rolling the rolling stock on the input side in the hot rolling mill.
- the hot rolling stand is designed as a finishing stand, which is used within a hot rolling mill, in particular for the step-by-step reshaping of the rolling stock to a predetermined size.
- a deviation between the different roll diameter ranges is> 6%, preferably> 10%.
- a discrepancy between those that can be represented by substitution Roller diameter ranges between a small roller diameter range and a large roller diameter range is therefore at least 6%, but preferably at least 10%. This has the advantage that, in the event of a deviation of this magnitude, the different requirements and also different relationships between rolling parameters and rolling diameter can be taken into account by changing.
- the adjusting device comprises, as components, a wedge adjustment of a lower work roll of the work roll pair and / or a hydraulic adjustment of an upper work roll of the work roll pair and / or a respective work roll bend of the lower and / or the upper work roll, the components of the adjusting device in each case each have an adjustment area for exchangeably accommodating the corresponding work rolls with different roll diameter ranges. This creates the possibility of being able to accommodate work rolls with different roll diameter ranges in the hot rolling stand, since the components can represent the strokes required for this individually or in total.
- the hot rolling stand is designed for reversing operation or one-way operation.
- a design for a reversing operation means that the rolling stock is guided through the hot rolling stand several times and in a reversing manner, i.e. with conveying directions opposite to one another, while with one-way operation, the rolling stock is guided through the hot rolling stand only in one direction and only once.
- a pass line fluctuation when using the different roller diameter ranges is less than +/- 20 mm, preferably +/- 15 mm, particularly preferably +/- 10 mm.
- Passline Understand the difference in height between the lower work roll of the work roll pair and an adjacent roll of a roller table, whereby the fluctuation of the pass line should be as low as possible, since otherwise there will be difficulties when threading the rolling stock between the work rolls or a collision of the rolling stock with the lower work roll could.
- the invention also relates to a hot rolling mill which comprises at least one hot rolling stand which is designed according to one or more of the aforementioned variants.
- the hot rolling mill is preferably composed of several units, which can include a preheating unit, a roughing train, an intermediate heating unit, a finishing train, a transport unit, a winding unit and / or various separating units.
- the hot rolling mill can have other units, such as scale washers, any induction heating devices, etc. exhibit.
- a roughing mill with at least one roughing stand and a finishing mill with at least one finishing stand is provided in a hot rolling mill, at least one roughing stand of the roughing mill and / or at least one finishing stand of the finishing mill as a hot rolling stand according to one or more of the aforementioned variants is executed.
- work rolls of the respective work roll pair can be changed in pairs while changing the roll diameter range.
- the invention also relates to a method for operating a hot rolling mill. At least the following process steps are run through: a) Checking a production sequence to be displayed
- operating parameters of a production sequence to be represented by the hot rolling mill are first recorded.
- the operating parameters define the process steps and process parameters of the hot rolling mill and the rolling stock necessary for the production of a target product from an initial product during the process steps.
- These operating parameters preferably include the parameters pass acceptance and operating mode.
- a current roll diameter range of work rolls of a work roll pair of this hot rolling stand is determined. It is then checked whether the desired operating parameters can be implemented with the current roll diameter range of the at least one hot rolling stand. If this is the case, a rolling process is carried out without making any change.
- test process is then repeated until the production sequence with the operating parameters in connection with the determined work roll diameter range match and the rolling process is then initiated.
- Production area can be used without having to compromise on the operating parameters. If it is determined that with the currently installed work rolls the desired
- the roll diameter range of the work roll pair in the at least one hot rolling stand can be modified in order to achieve the parameters even better or not at all. Overall, this enables flexible use of the hot rolling mill while at the same time reliably achieving the desired operating parameters.
- a change is made to a smaller roll diameter range when a pass decrease of> 40%, particularly preferably>50%,> 60% or very particularly preferably> 70% is determined in the hot rolling mill.
- Pass reductions of this magnitude with work rolls with a smaller roll diameter range have the advantage that the system load, a heat flow from the rolling stock into the respective roll and also energy consumption are reduced due to the reduced forming work.
- Pass decrease is to be understood as the thickness ratio of the rolling stock entering the roll gap to the rolling stock exiting the roll gap.
- a further reason for changing to a smaller roll diameter range can be given that a number of piercings of the individual work roll is smaller than a number of finished coils.
- the same is preferably also carried out when a rolling stock to be rolled is rolled endlessly and accordingly, de facto, endless operation of the hot rolling mill takes place.
- Another possible embodiment of the invention is that when the work rolls are changed in pairs, the area is changed to a larger roll diameter when a roll stand is pierced for each completely wound coil.
- a piercing of a roll stand for each finished coil means an individual operation or batch operation of the hot rolling mill, in which the use of work rolls with a larger roll diameter range is advantageous due to the greater thickness of the rolling stock.
- the pressure angle can be kept small, thus preventing the rolling stock from slipping.
- the method steps are guided by a system configurator.
- a system configurator which carries out the process steps and accordingly can initiate and coordinate the change in a roll diameter range of the work rolls in the at least one hot rolling stand and / or a change in the production sequence to be represented if the corresponding requirements are met.
- a calculation is carried out by the system configurator taking into account geometric limits based on the back-up rolls currently located in the individual roll stand.
- the background here is that, in a roll stand, the back-up rolls currently located in the roll stand in connection with the work rolls currently located in the roll stand the geometric Define ratios and thus, if necessary, take into account stroke limitations of the adjusting device. For example, in the area of the ground back-up roll located in the stand, the work rolls can be changed to another
- Process parameters such as gripping conditions, rolling speed, roll speed, drive speed, drive torque.
- FIG. 1 shows a schematic view of a hot rolling mill according to a preferred embodiment of the invention
- FIG. 2 shows a schematic representation of a hot rolling stand of the hot rolling mill from FIG. 1;
- Fig. 3 is a sectional view of the hot rolling stand from Fig. 2;
- FIG. 4 shows a flow chart of a method for operating the hot rolling mill from FIG. 1.
- FIG. 1 shows a schematic view of a hot rolling mill 1 which is designed according to a preferred embodiment of the invention.
- This hot rolling mill 1 can be connected in a production plant in particular to an upstream continuous casting plant - not shown in any more detail here - and comprises a roughing train 2, a finishing train 3, a flasher 4 and shears 5 and 6.
- a main transport direction 7 of the hot rolling mill 1 follows the entry-side roughing train 2, which is composed of several roughing stands 8 arranged one behind the other, first the shears 5, which in the main transport direction 7 between the roughing train 2 and the Finishing train 3 is arranged.
- the finishing rolling train has several finishing stands 9 arranged one behind the other, which are followed within the hot rolling mill 1 in the main transport direction 7 by the shears 6 and, at the end, by the flasher 4. Further known components, such as scale washers, meat frying devices, cooling devices, etc., are not shown for the sake of simplicity.
- the hot rolling stand 10 is designed as a four-high roll stand and comprises two roll stands 11, only one of which is visible in this view, a setting device 12, a pair of back-up rolls and a pair of work rolls 17.
- the pair of back-up rolls consists of an upper back-up roll 13 and a lower one Support roller 14 together, each of which is rotatably received in an associated chock 15 and 16, respectively.
- the back-up rolls 13 and 14 of the back-up roll pair support the work roll pair 17 with which the rolling stock fed to the hot rolling stand 10 is reshaped.
- work rolls 18 and 19 as well as 20 and 21 with different roll diameter ranges can be accommodated in the hot rolling stand 10, whereby in Fig. 3 a recording of the work rolls 18 and 19 with a large roller diameter range and in the right half a recording of the work rolls 20 and 21 is shown with a small roller diameter range.
- the currently installed work rolls 18 and 19 or 20 and 21 of the work roll pair always have the same roll diameter range, with work rolls 18 and 19 or 20 and 21 changing in pairs when the roll diameter range is changed.
- the roller diameter range is> 6%, preferably> 10%.
- the individual work roll 18 or 19 or 20 or 21 is rotatably guided in an associated chock 22 or 23 or 24 or 25.
- the adjusting device 12 comprises, in addition to the roll stands 11, as components a wedge adjustment 26 of the lower support roll 14 and the lower work roll 18 and 20, a hydraulic adjustment 27 of the upper support roll 13 and the upper one Work roll 19 or 21, as well as one work roll bend 28 or 29 of the upper work roll 19 or 21 and the lower work roll 18 or 20.
- the wedge adjustment 26, the hydraulic adjustment 27 and the work roll bends 28 and 29 each have an adjustment range in order to be able to realize the different strokes to represent the interchangeable mounting of the work rolls 18 and 19 or 20 and 21 with the different roll diameter ranges.
- a roller balancing 30 is assigned to the upper support roller 13.
- a drive of the respectively mounted work rolls 18 and 19 or 20 and 21 can also be seen, the work rolls 18 and 19 with the small roll diameter area being indicated by dashed lines in the view in FIG. 2.
- two drive motors 32 and 33 are provided, which are connected in tandem.
- a clutch 45 can be provided between the drive motors 32, 33.
- the drive motors 32 and 33 are connected on the output side to a transmission gear 34, which may be designed as a gearbox, which transmits a drive movement of the drive motors under translation to a pinion gear 35, via which the translated drive movement by means of spindles 36 and 37, respectively, to the respective associated, mounted work roll 18 or 19 or 20 or 21 is transmitted.
- the work rolls 18 and 19 or 20 and 21 each have roll hits 38 or 39 or 40 or 41, which are picked up by associated hits 42 and 43 of the spindles 36 and 37.
- production can also take place in an endless operation, in which the rolling stock is guided as an endless belt through the individual roll stands.
- the roll gap of each participating roll stand is set to the target thickness, the first target thickness being selected to be so large that the piercing can be carried out in a process-technically uncomplicated manner.
- a transition piece is produced which has a wedge-shaped thickness profile over its belt length.
- the rolled material / strip is only separated once by the scissors 6 and wound into individual coils using the reel system 4.
- the hot rolling mill 1 has a system configurator 44, which is indicated schematically in FIG. 1.
- this system configurator 44 is able to operate the hot rolling mill 1 according to a method according to the invention, the sequence of which is indicated in the flow chart in FIG.
- step S1 operating parameters of the production sequence currently to be displayed are determined, with these operating parameters preferably including the parameters of pass acceptance and operating mode. Upstream, downstream or parallel to this, it is also determined in a step S2 which one Roll diameter range of work rolls 18 and 19 or 20 and 21 of the pair of work rolls 17 of a hot rolling stand 10 is currently implemented, with this hot rolling stand 10, as described above, a paired exchange of work rolls 18 and 19 or 20 and 21 to work rolls with another Roll diameter range is possible.
- one or more of the roughing stands 8 and / or one or more of the finishing stands 9 can be designed with interchangeable work rolls.
- step S3 the system configurator 44 then checks whether the operating parameters recorded in step S1 match the respective roll diameter range of the individual hot rolling stand 10 determined in step S2. If this is answered in the affirmative, a rolling process is carried out without any change in a step S4.
- step S3 If, on the other hand, the result from step S3 is negative, a transition is made to a step S5 and / or a step S6.
- step S5 the production sequence and thus the desired operating parameters are changed, while in step S6 the system configurator 44 changes the roll diameter range by changing the work rolls in pairs.
- the aim of the system configurator 44 is to coordinate the operating parameters and the respective roller diameter range with one another.
- step S6 the system configurator 44 takes into account geometric limits due to the back-up rolls 13 and 14 currently located in the individual hot rolling stand 10, since only a corresponding lifting range can be displayed via the back-up rolls 13 and 14 of the respective hot rolling stand 10 and an additional replacement of the back-up rolls 13 and 14 is very expensive is.
- the system configurator takes into account 44 process parameters such as gripping conditions, rolling speed, roll speed, drive speed, etc.
- the function of the invention is described using the example of a three-stand roughing mill 2 with a roll diameter range 18.19 of 850 mm or a roll diameter range 20.21 of 1050 mm, which can be used in the hot rolling mill 1 with the two operating modes batch and endless.
- the permissible stock removal range for both roll diameter ranges is 100 mm.
- the rolling stock is always a simple carbon steel.
- the system configurator 44 usually assigns various general parameters to the operating modes:
- the absolute pass decrease is 70%
- the mass flow (strip thickness times strip speed) and the rolling torque are relatively high.
- the forming temperatures change only slightly due to the high belt speed.
- the system configurator 44 checks the operating parameters by itself or by means of a connected calculation model (Initial thickness, strip speed, roll speed, rolling torque and forming temperature), which result in the intended "batch" operating mode with a work roll diameter of 1050 mm and comes to the conclusion that the intended operating parameters and the roll diameter range used are suitable and the rolling process is below the planned Conditions can be made.
- the mass flow and the rolling torque are relatively low, namely 22% of the comparative value for the batch mode.
- the strip temperature changes significantly more, by an amount of 159 ° C.
- the system configurator 44 checks on the basis of itself or through a connected calculation model
- the system configurator 44 can propose with a changed gear stage of the transmission gear 34 or only with one To roll drive motor 33 in order to realize the lower speeds and torques with optimal utilization of the motor.
- the comparable speed would be 3.45 and would be the
- the two calculation examples shown are designed for a standard product. Due to the variance with a view to the alloy, temperature range, width of the rolled stock and the input and output thickness, there are significantly larger fan-outs, which must be taken into account by the design and calculations of the system configurator.
- a hot rolling mill can be implemented which can be flexibly adapted to different finished products, process management, dimensions, materials and / or quality requirements.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019219318 | 2019-12-11 | ||
DE102020201789 | 2020-02-13 | ||
DE102020206174 | 2020-05-15 | ||
PCT/EP2020/085853 WO2021116460A1 (de) | 2019-12-11 | 2020-12-11 | Warmwalzgerüst für ein warmwalzwerk und zum herstellen eines metallenen flachprodukts, warmwalzwerk sowie verfahren zum betreiben eines warmwalzwerks |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4072747A1 true EP4072747A1 (de) | 2022-10-19 |
EP4072747B1 EP4072747B1 (de) | 2024-02-07 |
EP4072747C0 EP4072747C0 (de) | 2024-02-07 |
Family
ID=74104049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20830107.7A Active EP4072747B1 (de) | 2019-12-11 | 2020-12-11 | Warmwalzgerüst für ein warmwalzwerk und zum herstellen eines metallenen flachprodukts, warmwalzwerk sowie verfahren zum betreiben eines warmwalzwerks |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230060110A1 (de) |
EP (1) | EP4072747B1 (de) |
JP (1) | JP2023510090A (de) |
CN (1) | CN114786832A (de) |
DE (1) | DE102020215769A1 (de) |
WO (1) | WO2021116460A1 (de) |
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FR1512480A (fr) * | 1966-12-26 | 1968-02-09 | Lorraine Laminage | Installation d'échange des cylindres d'un train de laminoir |
GB1385494A (en) * | 1972-01-27 | 1975-02-26 | British Steel Corp | Rolling mills |
US4038857A (en) * | 1976-04-26 | 1977-08-02 | Blaw-Knox Foundry & Mill Machinery, Inc. | Hydraulic mill stand |
JPS62275508A (ja) * | 1986-05-21 | 1987-11-30 | Hitachi Ltd | 六段圧延機 |
JPS6313601A (ja) | 1986-07-03 | 1988-01-20 | Kawasaki Steel Corp | 熱間連続仕上圧延機 |
JPS6313603A (ja) * | 1986-07-04 | 1988-01-20 | Hitachi Ltd | 圧延機 |
AT390392B (de) * | 1986-11-24 | 1990-04-25 | Andritz Ag Maschf | Walzwerk, insbesondere kaltwalzwerk |
JPH0745049B2 (ja) * | 1987-07-30 | 1995-05-17 | 株式会社日立製作所 | 圧延機の軸受箱 |
DE3811875A1 (de) * | 1987-10-13 | 1989-04-27 | Schloemann Siemag Ag | Fuehrungsvorrichtung |
JPH0688055B2 (ja) * | 1988-01-14 | 1994-11-09 | 株式会社日立製作所 | 圧延機、及び圧延設備 |
FR2786415B1 (fr) * | 1998-11-30 | 2001-02-09 | Kvaerner Metals Clecim | Laminoir equipe de moyens de cambrage des cylindres de travail |
DE10046426A1 (de) * | 2000-09-20 | 2002-03-28 | Sms Demag Ag | Kombinierter Antrieb für ein Vierwalzen- bzw. Sechswalzengerüst sowie Betriebsverfahren hierfür |
JP3274678B1 (ja) * | 2001-01-16 | 2002-04-15 | 川崎重工業株式会社 | 圧延機および圧延方法 |
FR2851942B1 (fr) * | 2003-03-05 | 2006-04-28 | Procede de changement de configuration d'un laminoir et laminoir perfectionne pour la mise en oeuvre du procede | |
JP3686899B2 (ja) * | 2003-03-31 | 2005-08-24 | 川崎重工業株式会社 | 圧延機の板クラウン算出方法および圧延機の板厚・板クラウン制御方法ならびに算出用プログラム |
JP4711637B2 (ja) * | 2004-03-18 | 2011-06-29 | 新日鉄エンジニアリング株式会社 | スキンパスミルのワークロール組替装置及び組替方法 |
CN100413610C (zh) * | 2005-11-30 | 2008-08-27 | 宝山钢铁股份有限公司 | 一种防止带钢在热轧过程中出现头部弯曲的控制方法 |
AT504209B1 (de) * | 2006-11-16 | 2008-04-15 | Voest Alpine Ind Anlagen | Walzenwechseleinrichtung mit keilverstelleinrichtung |
CN201172064Y (zh) * | 2007-12-26 | 2008-12-31 | 宝山钢铁股份有限公司 | 精轧轧制线高度调整装置 |
DE102008009902A1 (de) * | 2008-02-19 | 2009-08-27 | Sms Demag Ag | Walzvorrichtung, insbesondere Schubwalzengerüst |
JP5491090B2 (ja) * | 2009-07-22 | 2014-05-14 | 三菱日立製鉄機械株式会社 | 圧延機及びそれを備えたタンデム圧延機 |
BR112012027654B1 (pt) * | 2011-09-20 | 2018-03-13 | Mitsubishi-Hitachi Metals Machinery, Inc. | Laminador a frio para laminar uma tira de aço, sistemas de laminação em tandem e de laminação inversor, e, métodos de modificação de um sistema de laminação e operacional de um laminador a frio |
FR3006211B1 (fr) * | 2013-05-28 | 2015-05-15 | Fives Dms | Procede de changement de configuration d'un laminoir et laminoir pour la mise en oeuvre du procede. |
CN205732274U (zh) * | 2016-02-05 | 2016-11-30 | 山西工程职业技术学院 | 教学用单机架四辊可逆冷轧轧机 |
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2020
- 2020-12-11 CN CN202080086181.8A patent/CN114786832A/zh active Pending
- 2020-12-11 WO PCT/EP2020/085853 patent/WO2021116460A1/de active Search and Examination
- 2020-12-11 DE DE102020215769.3A patent/DE102020215769A1/de active Pending
- 2020-12-11 JP JP2022535686A patent/JP2023510090A/ja active Pending
- 2020-12-11 EP EP20830107.7A patent/EP4072747B1/de active Active
- 2020-12-11 US US17/784,354 patent/US20230060110A1/en active Pending
Also Published As
Publication number | Publication date |
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EP4072747B1 (de) | 2024-02-07 |
WO2021116460A1 (de) | 2021-06-17 |
EP4072747C0 (de) | 2024-02-07 |
JP2023510090A (ja) | 2023-03-13 |
DE102020215769A1 (de) | 2021-06-17 |
US20230060110A1 (en) | 2023-02-23 |
CN114786832A (zh) | 2022-07-22 |
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