EP3999259B1 - Cold rolling of rolled material - Google Patents
Cold rolling of rolled material Download PDFInfo
- Publication number
- EP3999259B1 EP3999259B1 EP20742679.2A EP20742679A EP3999259B1 EP 3999259 B1 EP3999259 B1 EP 3999259B1 EP 20742679 A EP20742679 A EP 20742679A EP 3999259 B1 EP3999259 B1 EP 3999259B1
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- EP
- European Patent Office
- Prior art keywords
- working roller
- rolling
- working
- diameter
- 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.)
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- 238000005097 cold rolling Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 title description 4
- 238000005096 rolling process Methods 0.000 claims description 195
- 238000005452 bending Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- 230000007423 decrease Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 210000003739 neck Anatomy 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 235000019589 hardness Nutrition 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007668 thin rolling process Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
-
- 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
- B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
-
- 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
-
- 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
- B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
-
- 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
- B21B31/07—Adaptation of roll neck bearings
-
- 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
-
- 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
- B21B2203/28—Mounting or dismounting bearing and chock as a unit
-
- 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
- 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
- B21B35/141—Rigid spindle couplings, e.g. coupling boxes placed on roll necks
Definitions
- the invention relates to a rolling device, a method and a rolling train for cold rolling rolled stock.
- the invention relates to a rolling device for cold-rolling rolling stock, comprising a roll stand, a plurality of equipment sets for selectively equipping the roll stand with one of the equipment sets, and a work roll drive.
- Each equipment set comprises two work rolls and, for each work roll, two work roll chocks assigned to the work roll, each of which has at least one work roll bearing for the work roll, and a spindle head assigned to the work roll, which can be positively connected to a work roll journal of the work roll.
- the roll stand has holders which are each designed to receive a work roll chock of an equipment set.
- the work roll drive has two drive spindles, which are each designed to drive a work roll via the spindle head assigned to the work roll by rotations about a longitudinal axis of the drive spindle.
- Such a rolling device is, for example, from CN 109 647 894 A known.
- two work rolls which are arranged one above the other and are each mounted in a bearing seat at their axial ends, can be changed in a roll stand with the aid of a roll changing device, which has a base that can be moved on rails, on which the work rolls rest, and a base that can be moved vertically within the roll stand Rail section includes.
- a rolling stock for example a metallic rolled strip
- the work rolls are arranged in a roll stand and are rotated about their longitudinal axes by a drive.
- a plurality of roll stands are often arranged one behind the other and form what is known as a rolling train, through which the rolling stock runs in one rolling direction, with the thickness of the rolling stock being gradually reduced.
- the rolling speed increases from roll stand to roll stand and the rolling torques decrease from roll stand to roll stand.
- the number of roll stands and the maximum reduction in thickness cannot be increased at will in terms of process technology, since the material strength of the rolling stock increases depending on the reduction in thickness. Above certain rolling stock strength values and work roll diameters, this leads to high flattening of the work rolls and reduced thickness reduction of the rolling stock.
- a roll stand In addition to the work rolls, a roll stand usually has so-called back-up rolls, which support the work rolls. Each roll is rotatably mounted at its ends on bearings each carried by a so-called chock installed for vertical sliding in a support of the rolling stand. Because the chocks can be moved vertically, the positions of the rolls can be changed and adapted to one another and to the thickness of the rolling stock. Bending forces can also be exerted on the work rolls via the work roll chocks, with which the work rolls are easily bent during rolling to a to achieve uniform thickness of the rolling stock in the axial direction, i.e. along the longitudinal axes of the work rolls.
- the work rolls wear out as the rolled stock is rolled. Therefore, the work rolls are ground off after a certain rolling time. This gradually reduces the roll diameter of the work rolls. Finally, the work rolls are replaced when their roll diameters have been reduced to a minimum work roll diameter as a result of grinding.
- the diameter of a work roll used for the first time is equal to the maximum work roll diameter of the work roll and can be reduced to the minimum work roll diameter by repeated grinding.
- the difference between the maximum and minimum work roll diameter is determined, among other things, by the so-called hardening depth, which defines the area that extends radially from the surface of a work roll into the interior and has a greater hardness than the remaining material of the work roll.
- the minimum and maximum work roll diameter of a work roll thus define the work roll diameter range of this work roll, within which the work roll can be used sensibly for rolling: if the work roll diameter were to leave the work roll diameter range due to further grinding, it is no longer used.
- the minimum work roll diameter is further determined by the rolling parameters (rolling torque, rolling force, roll tensions, rolling speed) and their effect on the selection of the work roll bearings and work roll journals on which the work rolls are driven and which in turn a determine the minimum inner diameter of the work roll bearings.
- the outside diameter and width of a work roll bearing determine the capacity of the work roll bearing.
- a recommended minimum wall thickness of the work roll chock corresponds to the outside diameter and the load of the work roll bearing.
- the rolling parameters are in turn determined by the material properties of the rolling stock and by its entry thickness, exit thickness and width.
- the rolling of high-strength and ultra-high-strength rolling stock with exit thicknesses of, for example, more than 0.5 mm leads to high rolling forces on all rolling stands and, in particular, to a lower thickness reduction capacity on the rear rolling stands (e.g. on the third and fourth rolling stands) compared to softer rolling stock.
- the torque requirements are in the higher and highest range.
- the rolling of very thin, high-strength rolling stock, for example to produce electrical strip steel with a relatively high silicon content and exit thicknesses of less than 0.5 mm leads to high specific rolling forces with moderate torques. In both cases, medium and large work roll diameters lead to high flattening of the work rolls on the rear roll stands, so that in these Cases small work roll diameters are preferred, especially on the rear roll stands.
- the invention is based on the object of specifying a rolling device, a method and a rolling train which enable the production of different rolled products, in particular rolled products of different hardnesses and thicknesses.
- a rolling device for cold-rolling rolling stock of the type mentioned at the outset is configured in that the work rolls have a work roll diameter range that is determined by a minimum work roll diameter and a maximum work roll diameter of the work roll, with the work rolls of one and the same equipment set each having the same work roll diameter range and the work rolls of different equipment sets have different work roll diameter ranges from one another. Included the work roll diameter range of one equipment set differs from the work roll diameter range of another equipment set if at least the minimum or maximum work roll diameter of the work rolls of one equipment set differs from the respective minimum or maximum work roll diameter of the work rolls of the other assembly set differs.
- each equipment set includes work roll chocks corresponding to its two work rolls in order to install the work rolls in the roll stand, and for each work roll a corresponding spindle head, via which the work roll can be driven with a drive spindle of the work roll drive.
- the roll stand can advantageously be adapted to the respective rolling stock.
- work rolls with a smaller work roll diameter can be used for rolling high-strength rolling stock than for rolling relatively soft rolling stock.
- the different overall height of equipment sets with work rolls of different work roll diameter ranges can be compensated for by the vertical displaceability of the chocks in the roll stand.
- a rolling device is suitable for a large product range of rolled products to be produced.
- the invention aims to be able to profitably process both relatively soft rolling stock and to be able to produce high-quality, high-strength steel products with small thicknesses, for example thicknesses of less than 0.5 mm, with the same rolling device.
- the work roll bearings of all equipment sets are designed as roller bearings, for example as tapered roller bearings.
- the minimum work roll diameter differs by 40 mm to 90 mm from the maximum work roll diameter of a tooling set.
- the work rolls of one equipment set have a minimum work roll diameter of 340 mm and a maximum work roll diameter of 385 mm
- the work rolls of another equipment set have a minimum work roll diameter of 375 mm and a maximum work roll diameter of 460 mm.
- the inner diameters of the work roll bearings of all tooling sets differ from each other by no more than two percent.
- work rolls with work roll necks of the same neck diameter can be used, so that the spindle heads also have the same inner diameter and the work rolls of all equipment sets can be driven with the same drive spindles.
- the drive spindles therefore do not have to be changed when converting the roll stand to work rolls with a different work roll diameter.
- a further embodiment of the rolling device provides that the work roll journals of the work rolls of all equipment sets have identical journal diameters and journal shapes.
- a diameter ratio of an outer diameter to an inner diameter of a work roll bearing may decrease with a decreasing work roll diameter range of the work rolls of the tooling sets. For example, one Diameter ratio of an outer diameter to an inner diameter of the work roll bearings of at least one equipment set at most 1.41 and a diameter ratio of an outer diameter to an inner diameter of the work roll bearings of at least one other equipment set at most 1.32.
- the roll stand can be adapted to the corresponding rolling stock classes by selecting the equipment set with a respective diameter ratio of the work roll bearings.
- the decrease in the diameter ratio of the work roll bearings with the work roll diameter takes into account that the sum of the outer radius of the work roll bearings and the wall thickness of the work roll chocks on the sides facing the rolling stock must be smaller than the minimum work roll radius, otherwise the work roll bearings of the two opposite work rolls in the roll stand collide respectively would stand in their way.
- a diameter ratio that is as small as possible enables, in particular with a given inner diameter of the work roll bearings, the lowest possible overall height of the work roll chocks and thus small work roll diameters.
- Small work roll diameters are in turn suitable for rolling high-strength and very high-strength rolling stock, in particular in the rear roll stands of a rolling train, as has already been explained above. Small work roll diameters also make it easier to bend the work rolls, since the bending forces required for bending are reduced.
- a ratio of a height of a work roll chock to an outside diameter of a work roll bearing of at least one equipment set is less than 1.09.
- This configuration of the rolling device also aims to reduce the work roll diameter by reducing the height of the work roll chocks.
- the reduction in the height of a work roll chock is particularly in combination with the above-mentioned reduction in the diameter ratio of the outside diameter to an inside diameter of the work roll bearing.
- a minimum wall thickness of a work roll chock of at least one equipment set on the side of the work roll chock facing the rolling stock is less than six percent of an outer diameter of a work roll bearing of the work roll chock.
- a minimum wall thickness of a work roll chock of at least one equipment set on a side facing the rolling stock is at most as great as a minimum wall thickness on a side of the work roll chock facing away from the rolling stock.
- the aforementioned configurations of the rolling device take into account that with decreasing work roll diameters, the work roll chocks approach one another and thus the risk increases that the work roll chocks collide or get in each other's way.
- a reduction in the minimum wall thicknesses of the work roll chocks on their sides facing the rolling stock increases the distance between the work roll chocks and thereby enables a further reduction in the work roll diameter without the work roll chocks colliding or getting in the way.
- the roll stand is equipped with an equipment set that is selected depending on the rolling stock.
- the work roll diameters in particular are those used for rolling Work rolls adapted to the strength, width, entry thickness and/or exit thickness of the rolling stock.
- the roll stand is equipped with an equipment set that is selected depending on a position of the rolling device in a rolling train.
- the position of a rolling device in a (multi-stand) rolling mill is understood to be the position that the rolling mill of the rolling mill occupies in a sequence of all rolling mills of the rolling mill in which the rolling stock passes through the rolling mills.
- This embodiment of the method according to the invention takes into account that the strength and thickness of the rolling stock as well as the rolling speed and the required rolling torques change along the rolling train, which in turn means that the work roll diameters of the work rolls of a rolling device that are most advantageous for the rolling process can depend on the position of the rolling device in the rolling train.
- a bending limit for positive bending of the work rolls is defined for at least one equipment set as a function of a minimum wall thickness of the work roll chocks on the sides of the work roll chocks facing the rolling stock, and the work rolls are not positively bent more than the bending limit.
- This embodiment of the method according to the invention is aimed in particular at the above-mentioned embodiment of a rolling device according to the invention, in which the minimum wall thicknesses of work roll chocks on the sides facing the rolling stock are reduced. A reduction in these wall thicknesses causes a reduction in the load-bearing capacity of the work roll chocks in the event of positive bending of the work rolls.
- the aforementioned embodiment of the method according to the invention takes this into account by appropriately limiting positive bending of the work rolls.
- the work rolls of at least one equipment set are bent negatively as a function of a crowning of the work rolls.
- This embodiment of the method according to the invention also aims to relieve the work roll chocks when the work rolls bend on their sides facing the rolling stock, in that instead of positive bends that particularly stress these sides, negative bends of the work rolls that preferably interact with a crowning of the work rolls are carried out, which results in a suitably designed crowning of the work rolls requires.
- an axial displacement of the work rolls relative to one another is set for at least one equipment set as a function of the width and thickness of the rolling stock.
- This allows the strip edges of the rolling stock to be relieved, for example in order to avoid edge cracks in the strip edges, which can occur without relieving the strip edges when rolling stock that is at risk of edge cracking, for example electrical strip steel with a silicon content of at least two percent.
- such a mutual axial displacement of the work rolls can prevent central areas of the work rolls, in which the work rolls assume their maximum work roll diameter, from touching in the area outside the rolling stock when rolling very thin rolled stock.
- a rolling train according to the invention has at least one rolling device according to the invention.
- the advantages of such a rolling train result from the above-mentioned advantages of a rolling device according to the invention.
- a rolling mill train according to the invention allows the rolling devices according to the invention to be converted as a function of the respective rolling stock, that is to say the adjustment of the equipping of the roll stands Rolling devices on the rolling stock, and thus processing different rolling stock or the production of different rolled products with the same rolling train.
- FIG. 1 shows a sectional view of an embodiment of a rolling device 1 according to the invention for cold rolling of rolling stock 3.
- the rolling device 1 comprises a roll stand 5, several equipment sets for selectively equipping the roll stand 5 with one of the equipment sets and a work roll drive.
- Each assembly set comprises two work rolls 7, 8 and for each work roll 7, 8 two work roll chocks 9 and 9 assigned to the work roll 7, 8 a spindle head 11 assigned to the work roll 7, 8.
- the two work rolls 7, 8 of one equipment set have the same work roll diameter range, the work rolls 7, 8 of different equipment sets have different work roll diameter ranges.
- figure 2 shows the work rolls 7, 8 of an assembly set and a rolling stock 3 with a width b that is passed between the work rolls 7, 8.
- the work roll diameter D of a work roll 7, 8 is a maximum diameter of the work roll 7, 8 and is assumed by the work roll 7, 8 in a central area 13 which is approximately circular-cylindrical and usually ground crowned or bottle-shaped.
- One end of the central portion 13 of each work roll 7, 8 has a chamfer 15, the chamfers 15 of the two work rolls 7, 8 being arranged opposite to each other.
- Each end region of a work roll 7, 8 is designed as a work roll journal 16, the journal diameter d of which is smaller than the diameter D of the work roll.
- the journal diameter d of the work rolls 7, 8 of all equipment sets are the same.
- the work rolls 7, 8 are axially displaced relative to one another in such a way that the bevels 15 of the two work rolls 7, 8 are each arranged in the region of one of the two lateral strip edges of the rolling stock 3.
- the strip edges of the rolling stock 3 are relieved during rolling, for example in order to avoid edge cracks in the strip edges, which can occur if the strip edges are not relieved when rolling stock 3 that is at risk of edge cracking, for example electrical strip steel with a silicon content of at least two percent.
- such a mutual axial displacement of the work rolls 7, 8 can prevent the central regions 13 of the work rolls 7, 8 from touching in the area outside the rolling stock 3 when rolling very thin rolling stock 3.
- Each work roll chock 9 has a work roll bearing 17 for a work roll journal 16 of a work roll 7 , 8 .
- the work roll bearing 17 is a rolling bearing, for example a tapered roller bearing, with an inner diameter d1, which corresponds to the journal diameter d of the work roll journal 16, and an outer diameter D1.
- the inner diameter d1 of the work roll bearings 17 of all equipment sets are at least approximately identical; for example, they deviate from each other by a maximum of two percent.
- the outer diameters D1 of the work roll bearings 17 of the different equipment sets can differ significantly from one another.
- a diameter ratio D1/d1 of the outer diameter D1 to the inner diameter d1 of a work roll bearing 17 decreases as the roll diameter D of the work rolls 7, 8 of the tooling sets decreases.
- this diameter ratio for at least one equipment set, in particular for equipment sets with small work roll diameters D is at most 1.32.
- a ratio A/D1 of a height A of a work roll chock 9 to the outer diameter D1 of the work roll bearing 17 of the work roll chock 9 for at least one equipment set, in particular for all equipment sets is preferably less than 1.09.
- the roll stand 5 For rolling a rolling stock 3 with the rolling device 1, the roll stand 5 is equipped with the work roll chocks 9 and work rolls 7, 8 of an assembly set.
- the roll stand 5 has four holders 19, each of which accommodates a work roll chock 9 and in which the work roll chocks 9 can be displaced vertically, for example by means of hydraulic cylinders (not shown).
- bending forces can be exerted on the work rolls 7, 8 via the brackets 19.
- a work roll 7, 8 can be positively bent by a bending force in a first bending force direction 21 directed away from the rolling stock 3.
- a work roll 7, 8 can be bent negatively by a bending force in a second bending force direction 22 directed towards the rolling stock 3.
- a second load zone 24 of the work roll chock 9 facing away from the rolling stock 3 is loaded, with figure 1 here acting forces are represented by arrows in the second load zone 24 .
- the rolling device 1 of the in figure 1 also has back-up rolls 25, which are arranged above and below the holders 19 and are vertically displaceable, so that their positions can be adapted to the work roll diameters D and positions of the work rolls 7, 8.
- figure 3 shows the work roll neck 16 of a work roll 7, 8, the spindle head 11 assigned to the work roll 7, 8 and a drive spindle 27 of the work roll drive of the rolling device 1 in a sectional view.
- the spindle head 11 is tubular.
- An end of the spindle head 11 facing the work roll neck 16 forms an opening whose cross section corresponds to a cross section of the end of the work roll neck 16 and into which the end of the work roll neck 16 protrudes.
- the cross section of the end of the work roll neck 16 is not circular, but has, for example, the shape of a circle from which two circle segments resulting from a point reflection at the circle center of the circle are cut out. As a result, the spindle head 11 and the end of the work roll neck 16 are positively connected to one another.
- One end of the drive spindle 27 protrudes into the other end of the spindle head 11 .
- This end of the drive spindle 27 has an external toothing 29 which leads to an internal toothing 31 on an inner surface of the Spindle head 11 corresponds, so that rotations of the drive spindle 27 about its longitudinal axis are transmitted to the spindle head 11 and via the spindle head 11 to the work roll neck 16 and the work roll 7, 8 drive.
- the rotations of the drive screw 27 are generated by a drive unit (not shown) of the work roll drive such as a motor.
- a wall thickness, an outer diameter and the internal toothing 31 of the spindle head 11 are designed for the maximum torque of the work roll drive for driving the work roll 7, 8 to which the spindle head 11 is assigned.
- the spindle head 11 is also designed in such a way that an angle between the longitudinal axes of the drive spindle 27 and the spindle head 11 can be adjusted in order to compensate for a change in the position of the work roll 7, 8, for example after the work roll 7, 8 has been ground down.
- FIG 4 shows a work roll chock 9 of a further exemplary embodiment of a rolling device 1.
- the work roll chock 9 has a minimum wall thickness W1 on a side 33 facing the rolling stock 3, which is smaller than a minimum wall thickness W2 on the side 34 facing away from the rolling stock 3.
- the minimum wall thickness W1 on the side 33 facing the rolling stock 3 is less than six percent of the outer diameter D1 of the work roll bearing 17 of the work roll chock 9.
- a bending limit for positive bending of the work rolls 7, 8 is preferably defined as a function of the minimum wall thickness W1 of the work roll chocks 9 on the sides facing the rolling stock 3, and the work rolls 7, 8 are not positively bent more than the bending limit.
- figure 5 shows schematically a rolling train 35 with four rolling devices 1 according to the invention
- Rolling devices 1 are arranged one behind the other along a rolling direction 37 in which the rolling stock 3 runs through the rolling train 35 .
- All rolling devices 1 of the rolling train 35 are preferably of the same design with regard to the drive spindles 27, spindle heads 11, work roll journals 16 of the work rolls 7, 8 and work roll chocks 9, so that these components can be exchanged between the rolling devices 1. This advantageously simplifies the provision of spare parts and increases the profitability of rolling mill 35.
- the roll stand 5 of a rolling device 1 is equipped with an equipment set that is selected depending on the rolling stock 3, in particular on its strength, width b, entry thickness and/or exit thickness and on a position of the rolling device 1 in the rolling train 35.
- the roll stands 5 of the two rear rolling devices 1 are fitted with work rolls 7, 8, the work roll diameters of which D are smaller than the work roll diameters D of the work rolls 7, 8, with which the roll stands 5 of the two front rolling devices 1 are equipped.
- the two rear rolling devices 1 are equipped with work rolls 7, 8 with work roll diameters D of at most 350 mm to 430 mm (depending on the width b of the rolling stock 3) and the two front rolling devices 1 are equipped with work rolls 7, 8 with work roll diameters D of at most 400 mm to 490 mm (depending on the width b of the rolling stock 3).
Description
Die Erfindung betrifft eine Walzvorrichtung, ein Verfahren und eine Walzstraße zum Kaltwalzen von Walzgut.The invention relates to a rolling device, a method and a rolling train for cold rolling rolled stock.
Die Erfindung betrifft eine Walzvorrichtung zum Kaltwalzen von Walzgut, umfassend ein Walzgerüst, mehrere Bestückungssätze zum wahlweisen Bestücken des Walzgerüsts mit einem der Bestückungssätze und einen Arbeitswalzenantrieb. Jeder Bestückungssatz umfasst zwei Arbeitswalzen und für jede Arbeitswalze zwei der Arbeitswalze zugeordnete Arbeitswalzeneinbaustücke, die jeweils mindestens ein Arbeitswalzenlager für die Arbeitswalze aufweisen, und einen der Arbeitswalze zugeordneten Spindelkopf, der formschlüssig mit einem Arbeitswalzenzapfen der Arbeitswalze verbindbar ist. Das Walzgerüst weist Halterungen auf, die jeweils zum Aufnehmen eines Arbeitswalzeneinbaustücks eines Bestückungssatzes ausgebildet sind. Der Arbeitswalzenantrieb weist zwei Antriebsspindeln auf, die jeweils zum Antreiben einer Arbeitswalze über den der Arbeitswalze zugeordneten Spindelkopf durch Drehungen um eine Längsachse der Antriebsspindel ausgebildet sind.The invention relates to a rolling device for cold-rolling rolling stock, comprising a roll stand, a plurality of equipment sets for selectively equipping the roll stand with one of the equipment sets, and a work roll drive. Each equipment set comprises two work rolls and, for each work roll, two work roll chocks assigned to the work roll, each of which has at least one work roll bearing for the work roll, and a spindle head assigned to the work roll, which can be positively connected to a work roll journal of the work roll. The roll stand has holders which are each designed to receive a work roll chock of an equipment set. The work roll drive has two drive spindles, which are each designed to drive a work roll via the spindle head assigned to the work roll by rotations about a longitudinal axis of the drive spindle.
Eine derartige Walzvorrichtung ist beispielsweise aus der
Beim Kaltwalzen wird ein Walzgut, beispielsweise ein metallisches Walzband, zwischen zwei Arbeitswalzen hindurchgeführt, die durch einen Walzspalt beabstandet sind. Die Arbeitswalzen sind in einem Walzgerüst angeordnet und werden durch einen Antrieb um ihre Längsachsen gedreht. Häufig sind mehrere Walzgerüste hintereinander angeordnet und bilden eine so genannte Walzstraße, die von dem Walzgut in einer Walzrichtung durchlaufen wird, wobei die Dicke des Walzguts schrittweise reduziert wird. In typischen Anwendungen erhöht sich die Walzgeschwindigkeit von Walzgerüst zu Walzgerüst und die Walzmomente reduzieren sich von Walzgerüst zu Walzgerüst. Die Anzahl der Walzgerüste und die maximale Dickenreduktion können jedoch prozesstechnisch nicht beliebig erhöht werden, da sich die Materialfestigkeit des Walzguts abhängig von der Dickenreduktion erhöht. Dies führt ab gewissen Walzgutfestigkeitswerten und Arbeitswalzendurchmessern zu hohen Abplattungen der Arbeitswalzen und verminderter Dickenreduktion des Walzguts.During cold rolling, a rolling stock, for example a metallic rolled strip, is passed between two work rolls which are spaced apart by a roll gap. The work rolls are arranged in a roll stand and are rotated about their longitudinal axes by a drive. A plurality of roll stands are often arranged one behind the other and form what is known as a rolling train, through which the rolling stock runs in one rolling direction, with the thickness of the rolling stock being gradually reduced. In typical applications, the rolling speed increases from roll stand to roll stand and the rolling torques decrease from roll stand to roll stand. However, the number of roll stands and the maximum reduction in thickness cannot be increased at will in terms of process technology, since the material strength of the rolling stock increases depending on the reduction in thickness. Above certain rolling stock strength values and work roll diameters, this leads to high flattening of the work rolls and reduced thickness reduction of the rolling stock.
Meist weist ein Walzgerüst neben den Arbeitswalzen so genannte Stützwalzen auf, die die Arbeitswalzen stützen. Jede Walze ist an ihren Enden drehbar auf Lagern montiert, die jeweils von einem so genannten Einbaustück getragen werden, das vertikal verschiebbar in einer Halterung des Walzgerüsts installiert ist. Durch die vertikale Verschiebbarkeit der Einbaustücke können die Positionen der Walzen verändert und einander und der Dicke des Walzguts angepasst werden. Über die Arbeitswalzeneinbaustücke können ferner Biegekräfte auf die Arbeitswalzen ausgeübt werden, mit denen die Arbeitswalzen beim Walzen leicht gebogen werden, um eine gleichmäßige Dicke des Walzguts in axialer Richtung, das heißt entlang der Langsächsen der Arbeitswalzen, zu erzielen.In addition to the work rolls, a roll stand usually has so-called back-up rolls, which support the work rolls. Each roll is rotatably mounted at its ends on bearings each carried by a so-called chock installed for vertical sliding in a support of the rolling stand. Because the chocks can be moved vertically, the positions of the rolls can be changed and adapted to one another and to the thickness of the rolling stock. Bending forces can also be exerted on the work rolls via the work roll chocks, with which the work rolls are easily bent during rolling to a to achieve uniform thickness of the rolling stock in the axial direction, i.e. along the longitudinal axes of the work rolls.
Die Arbeitswalzen nutzen sich beim Walzen des Walzguts ab. Daher werden die Arbeitswalzen jeweils nach einer gewissen Walzdauer abgeschliffen. Dadurch verringern sich sukzessive die Walzendurchmesser der Arbeitswalzen. Schließlich werden die Arbeitswalzen ausgetauscht, wenn sich ihre Walzendurchmesser durch das Abschleifen auf einen minimalen Arbeitswalzendurchmesser verkleinert haben. Der Durchmesser einer erstmalig eingesetzten Arbeitswalze ist gleich dem maximalen Arbeitswalzendurchmesser der Arbeitswalze und kann durch wiederholtes Abschleifen bis auf den minimalen Arbeitswalzendurchmesser verringert werden. Die Differenz zwischen maximalem und minimalem Arbeitswalzendurchmesser wird unter anderem durch die sogenannte Einhärtetiefe bestimmt, welche jenen von der Oberfläche einer Arbeitswalze radial in das Innere reichenden Bereich definiert, der eine größere Härte aufweist als das restliche Material der Arbeitswalze. Nur wenn der aktuelle Durchmesser einer Arbeitswalze zwischen dem entsprechenden maximalen und minimalen Arbeitswalzendurchmesser - und somit die aktuelle Oberfläche der Arbeitswalze in einem Bereich mit größerer Härte als der restliche Arbeitswalzenkörper - liegt, wird die Arbeitswalze am Walzgerüst eingesetzt. Der minimale und der maximale Arbeitswalzendurchmesser einer Arbeitswalze definieren somit den Arbeitswalzendurchmesserbereich dieser Arbeitswalze, innerhalb welchem der sinnvolle Einsatz der Arbeitswalze zum Walzen möglich ist: wenn der Arbeitswalzendurchmesser durch ein weiteres Abschleifen den Arbeitswalzendurchmesserbereich verlassen würde, wird sie nicht mehr verwendet.The work rolls wear out as the rolled stock is rolled. Therefore, the work rolls are ground off after a certain rolling time. This gradually reduces the roll diameter of the work rolls. Finally, the work rolls are replaced when their roll diameters have been reduced to a minimum work roll diameter as a result of grinding. The diameter of a work roll used for the first time is equal to the maximum work roll diameter of the work roll and can be reduced to the minimum work roll diameter by repeated grinding. The difference between the maximum and minimum work roll diameter is determined, among other things, by the so-called hardening depth, which defines the area that extends radially from the surface of a work roll into the interior and has a greater hardness than the remaining material of the work roll. Only when the current diameter of a work roll is between the corresponding maximum and minimum work roll diameter - and thus the current surface of the work roll is in an area with greater hardness than the rest of the work roll body - is the work roll used on the roll stand. The minimum and maximum work roll diameter of a work roll thus define the work roll diameter range of this work roll, within which the work roll can be used sensibly for rolling: if the work roll diameter were to leave the work roll diameter range due to further grinding, it is no longer used.
Der minimale Arbeitswalzendurchmesser wird weiterhin bestimmt durch die Walzparameter (Walzmoment, Walzkraft, Walzzüge, Walzgeschwindigkeit) und deren Auswirkung auf die Auswahl der Arbeitswalzenlager und Arbeitswalzenzapfen, an denen die Arbeitswalzen angetrieben werden und die wiederum einen minimalen Innendurchmesser der Arbeitswalzenlager bestimmen. Der Außendurchmesser und die Breite eines Arbeitswalzenlagers bestimmen die Kapazität des Arbeitswalzenlagers. Zu dem Außendurchmesser und der Belastung des Arbeitswalzenlagers korrespondiert eine empfohlene minimale Wandstärke des Arbeitswalzeneinbaustücks. Somit bestimmen die Dimensionen der Arbeitswalzenlager, die Wandstärken der Arbeitswalzeneinbaustücke und ein Sicherheitsabstand, welcher die Kollision der Arbeitswalzen und Arbeitswalzeneinbaustücke vermeiden soll, den minimalen verwendbaren Durchmesser der Arbeitswalzen. Die Walzparameter werden wiederum von den Materialeigenschaften des Walzguts sowie von dessen Einlaufdicke, Auslaufdicke und Breite bestimmt.The minimum work roll diameter is further determined by the rolling parameters (rolling torque, rolling force, roll tensions, rolling speed) and their effect on the selection of the work roll bearings and work roll journals on which the work rolls are driven and which in turn a determine the minimum inner diameter of the work roll bearings. The outside diameter and width of a work roll bearing determine the capacity of the work roll bearing. A recommended minimum wall thickness of the work roll chock corresponds to the outside diameter and the load of the work roll bearing. Thus, the dimensions of the work roll bearings, the wall thicknesses of the work roll chocks and a safety distance, which is intended to avoid the collision of the work rolls and work roll chocks, determine the minimum usable diameter of the work rolls. The rolling parameters are in turn determined by the material properties of the rolling stock and by its entry thickness, exit thickness and width.
So stellt ein relatives weiches Walzgut mit einer großen Breite und Dicke und einer hohen geforderten Dickenreduktion von beispielsweise mehr als 80 Prozent hohe Drehmomentanforderungen speziell an die ersten beiden Walzgerüste einer Walzstraße und bewirkt hohe Temperaturbelastungen der Komponenten der hinteren Walzgerüste. Für ein derartiges Walzen weichen Walzguts sind daher große Arbeitswalzendurchmesser bevorzugt.A relatively soft rolling stock with a large width and thickness and a high required thickness reduction of more than 80 percent, for example, places high torque demands on the first two roll stands of a rolling train and causes high temperature loads on the components of the rear roll stands. Large work roll diameters are therefore preferred for such rolling of soft rolling stock.
Das Walzen hoch- und höchstfesten Walzguts mit Auslaufdicken von beispielsweise mehr als 0,5 mm führt zu hohen Walzkräften an allen Walzgerüsten und speziell zu einem geringeren Dickenreduktionsvermögen an den hinteren Walzgerüsten (beispielsweise am dritten und vierten Walzgerüst) im Vergleich zu weicherem Walzgut. Die Drehmomentanforderungen sind im höheren und höchsten Bereich. Das Walzen sehr dünnen hochfesten Walzguts, beispielsweise zum Herstellen von Elektrobandstahl mit relativ hohem Siliziumgehalt und Auslaufdicken von weniger als 0,5 mm, führt zu hohen spezifischen Walzkräften mit moderaten Drehmomenten. In beiden Fällen führen mittlere und große Arbeitswalzendurchmesser zu hohen Abplattungen der Arbeitswalzen an den hinteren Walzgerüsten, so dass in diesen Fällen insbesondere an den hinteren Walzgerüsten kleine Arbeitswalzendurchmesser bevorzugt sind.The rolling of high-strength and ultra-high-strength rolling stock with exit thicknesses of, for example, more than 0.5 mm leads to high rolling forces on all rolling stands and, in particular, to a lower thickness reduction capacity on the rear rolling stands (e.g. on the third and fourth rolling stands) compared to softer rolling stock. The torque requirements are in the higher and highest range. The rolling of very thin, high-strength rolling stock, for example to produce electrical strip steel with a relatively high silicon content and exit thicknesses of less than 0.5 mm, leads to high specific rolling forces with moderate torques. In both cases, medium and large work roll diameters lead to high flattening of the work rolls on the rear roll stands, so that in these Cases small work roll diameters are preferred, especially on the rear roll stands.
Der Erfindung liegt die Aufgabe zugrunde, eine Walzvorrichtung, ein Verfahren und eine Walzstraße anzugeben, die eine Produktion unterschiedlicher Walzprodukte, insbesondere von Walzprodukten unterschiedlicher Härten und Dicken, ermöglichen.The invention is based on the object of specifying a rolling device, a method and a rolling train which enable the production of different rolled products, in particular rolled products of different hardnesses and thicknesses.
Die Aufgabe wird erfindungsgemäß durch ein Walzgerüst mit den Merkmalen des Anspruchs 1, ein Verfahren mit den Merkmalen des Anspruchs 11 und eine Walzstraße mit den Merkmalen des Anspruchs 16 gelöst.The object is achieved according to the invention by a roll stand having the features of
Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous configurations of the invention are the subject matter of the dependent claims.
Eine erfindungsgemäße Walzvorrichtung zum Kaltwalzen von Walzgut der eingangs genannten Art wird dadurch ausgestaltet, dass die Arbeitswalzen einen Arbeitswalzendurchmesserbereich aufweisen, der jeweils durch einen minimalen Arbeitswalzendurchmesser und einen maximalen Arbeitswalzendurchmesser der Arbeitswalze bestimmt ist, wobei die Arbeitswalzen ein- und desselben Bestückungssatzes jeweils denselben Arbeitswalzendurchmesserbereich aufweisen und die Arbeitswalzen unterschiedlicher Bestückungssätze voneinander verschiedene Arbeitswalzendurchmesserbereiche aufweisen. Dabei unterscheidet sich der Arbeitswalzendurchmesserbereich eines Bestückungssatzes vom Arbeitswalzendurchmesserbereich eines anderen Bestückungssatzes dann, wenn sich zumindest der minimale oder der maximale Arbeitswalzendurchmesser der Arbeitswalzen des einen Bestückungssatzes vom jeweiligen minimalen bzw. maximalen Arbeitswalzendurchmesser der Arbeitswalzen des anderen Bestückungssatzes unterscheidet.A rolling device according to the invention for cold-rolling rolling stock of the type mentioned at the outset is configured in that the work rolls have a work roll diameter range that is determined by a minimum work roll diameter and a maximum work roll diameter of the work roll, with the work rolls of one and the same equipment set each having the same work roll diameter range and the work rolls of different equipment sets have different work roll diameter ranges from one another. Included the work roll diameter range of one equipment set differs from the work roll diameter range of another equipment set if at least the minimum or maximum work roll diameter of the work rolls of one equipment set differs from the respective minimum or maximum work roll diameter of the work rolls of the other assembly set differs.
Das Walzgerüst einer erfindungsgemäßen Walzvorrichtung kann also mit Arbeitswalzen unterschiedlicher Arbeitswalzendurchmesserbereiche bestückt werden. Dazu umfasst jeder Bestückungssatz zu seinen beiden Arbeitswalzen korrespondierende Arbeitswalzeneinbaustücke, um die Arbeitswalzen in das Walzgerüst einzubauen, und für jede Arbeitswalze einen zu ihr korrespondierenden Spindelkopf, über den die Arbeitswalze mit einer Antriebsspindel des Arbeitswalzenantriebs angetrieben werden kann. Damit kann das Walzgerüst vorteilhaft dem jeweiligen Walzgut angepasst werden. So können beispielsweise zum Walzen hochfesten Walzguts Arbeitswalzen kleineren Arbeitswalzendurchmessers eingesetzt werden als zum Walzen relativ weichen Walzguts. Die unterschiedliche Bauhöhe von Bestückungssätzen mit Arbeitswalzen unterschiedlicher Arbeitswalzendurchmesserbereiche kann durch die vertikale Verschiebbarkeit der Einbaustücke im Walzgerüst ausgeglichen werden. Dadurch eignet sich eine erfindungsgemäße Walzvorrichtung für ein großes Produktspektrum herzustellender Walzprodukte. Insbesondere zielt die Erfindung darauf ab, mit derselben Walzvorrichtung profitabel sowohl relativ weiches Walzgut bearbeiten zu können als auch qualitativ hochwertige hochfeste Stahlprodukte mit geringen Dicken, beispielsweise Dicken kleiner als 0,5 mm, herstellen zu können.The roll stand of a rolling device according to the invention can therefore be equipped with work rolls of different work roll diameter ranges. For this purpose, each equipment set includes work roll chocks corresponding to its two work rolls in order to install the work rolls in the roll stand, and for each work roll a corresponding spindle head, via which the work roll can be driven with a drive spindle of the work roll drive. In this way, the roll stand can advantageously be adapted to the respective rolling stock. For example, work rolls with a smaller work roll diameter can be used for rolling high-strength rolling stock than for rolling relatively soft rolling stock. The different overall height of equipment sets with work rolls of different work roll diameter ranges can be compensated for by the vertical displaceability of the chocks in the roll stand. As a result, a rolling device according to the invention is suitable for a large product range of rolled products to be produced. In particular, the invention aims to be able to profitably process both relatively soft rolling stock and to be able to produce high-quality, high-strength steel products with small thicknesses, for example thicknesses of less than 0.5 mm, with the same rolling device.
Bei einer Ausgestaltung der Walzvorrichtung sind die Arbeitswalzenlager aller Bestückungssätze als Wälzlager, beispielsweise als Kegelrollenlager, ausgebildet.In one configuration of the rolling device, the work roll bearings of all equipment sets are designed as roller bearings, for example as tapered roller bearings.
Bei einer weiteren Ausgestaltung der Walzvorrichtung unterscheidet sich der minimale Arbeitswalzendurchmesser um 40mm bis 90mm von dem maximalen Arbeitswalzendurchmesser eines Bestückungssatzes.In a further embodiment of the rolling device, the minimum work roll diameter differs by 40 mm to 90 mm from the maximum work roll diameter of a tooling set.
Bei einer weiteren Ausgestaltung der Walzvorrichtung weisen die Arbeitswalzen eines Bestückungssatzes einen minimalen Arbeitswalzendurchmesser von 340mm und einen maximalen Arbeitswalzendurchmesser von 385mm auf und die Arbeitswalzen eines anderen Bestückungssatzes weisen einen minimalen Arbeitswalzendurchmesser von 375mm und einem maximalen Arbeitswalzendurchmesser von 460mm auf. Dadurch kann ein Walzgerüst nur durch Wechseln des Bestückungssatzes für das Walzen von höchstfestem Walzgut eingerichtet werden, für welche Walzendurchmesser von kleiner als 375mm benötigt werden. Dadurch wird vorteilhaft die Erweiterung des produziertbaren Produktspektrums mit geringem Aufwand ermöglicht.In a further configuration of the rolling device, the work rolls of one equipment set have a minimum work roll diameter of 340 mm and a maximum work roll diameter of 385 mm, and the work rolls of another equipment set have a minimum work roll diameter of 375 mm and a maximum work roll diameter of 460 mm. As a result, a roll stand can be set up for rolling high-strength rolling stock, for which roll diameters of less than 375mm are required, simply by changing the equipment set. This advantageously enables the product range that can be produced to be expanded with little effort.
Vorzugsweise weichen die Innendurchmesser der Arbeitswalzenlager aller Bestückungssätze höchstens zwei Prozent voneinander ab. Dadurch können Arbeitswalzen mit Arbeitswalzenzapfen gleichen Zapfendurchmessers verwendet werden, so dass auch die Spindelköpfe gleiche Innendurchmesser aufweisen und die Arbeitswalzen aller Bestückungssätze mit denselben Antriebsspindeln angetrieben werden können. Die Antriebsspindeln müssen daher bei einer Umrüstung des Walzgerüsts auf Arbeitswalzen eines anderen Arbeitswalzendurchmessers nicht gewechselt werden. Dementsprechend sieht eine weitere Ausgestaltung der Walzvorrichtung vor, dass die Arbeitswalzenzapfen der Arbeitswalzen aller Bestückungssätze identische Zapfendurchmesser und Zapfenformen aufweisen.Preferably, the inner diameters of the work roll bearings of all tooling sets differ from each other by no more than two percent. As a result, work rolls with work roll necks of the same neck diameter can be used, so that the spindle heads also have the same inner diameter and the work rolls of all equipment sets can be driven with the same drive spindles. The drive spindles therefore do not have to be changed when converting the roll stand to work rolls with a different work roll diameter. Accordingly, a further embodiment of the rolling device provides that the work roll journals of the work rolls of all equipment sets have identical journal diameters and journal shapes.
Ein Durchmesserverhältnis eines Außendurchmessers zu einem Innendurchmesser eines Arbeitswalzenlagers kann mit abnehmendem Arbeitswalzendurchmesserbereich der Arbeitswalzen der Bestückungssätze abnehmen. Beispielsweise beträgt ein Durchmesserverhältnis eines Außendurchmessers zu einem Innendurchmesser der Arbeitswalzenlager wenigstens eines Bestückungssatzes höchstens 1,41 und ein Durchmesserverhältnis eines Außendurchmessers zu einem Innendurchmesser der Arbeitswalzenlager wenigstens eines anderen Bestückungssatzes höchstens 1,32. Das Walzgerüst kann durch Auswahl des Bestückungssatzes mit einem jeweiligen Durchmesserverhältnis der Arbeitswalzenlager an entsprechende Walzgutklassen angepasst werden. Die Abnahme des Durchmesserverhältnisses der Arbeitswalzenlager mit dem Arbeitswalzendurchmesser berücksichtigt, dass die Summe des Außenradius der Arbeitswalzenlager und der Wandstärke der Arbeitswalzeneinbaustücke auf den dem Walzgut zugewandten Seiten kleiner sein muss als der minimale Arbeitswalzenradius, da andernfalls die Arbeitswalzenlager der beiden sich gegenüberliegenden Arbeitswalzen im Walzgerüst zusammenstoßen beziehungsweise sich im Wege stehen würden. Ein möglichst geringes Durchmesserverhältnis ermöglicht, insbesondere bei vorgegebenem Innendurchmesser der Arbeitswalzenlager, eine möglichst geringe Bauhöhe der Arbeitswalzeneinbaustücke und damit kleine Arbeitswalzendurchmesser. Kleine Arbeitswalzendurchmesser eignen sich wiederum zum Walzen hoch- und höchstfesten Walzguts, insbesondere in hinteren Walzgerüsten einer Walzstraße wie oben bereits ausgeführt wurde. Kleine Arbeitswalzendurchmesser erleichtern außerdem das Biegen der Arbeitswalzen, da die zum Biegen erforderlichen Biegekräfte reduziert werden.A diameter ratio of an outer diameter to an inner diameter of a work roll bearing may decrease with a decreasing work roll diameter range of the work rolls of the tooling sets. For example, one Diameter ratio of an outer diameter to an inner diameter of the work roll bearings of at least one equipment set at most 1.41 and a diameter ratio of an outer diameter to an inner diameter of the work roll bearings of at least one other equipment set at most 1.32. The roll stand can be adapted to the corresponding rolling stock classes by selecting the equipment set with a respective diameter ratio of the work roll bearings. The decrease in the diameter ratio of the work roll bearings with the work roll diameter takes into account that the sum of the outer radius of the work roll bearings and the wall thickness of the work roll chocks on the sides facing the rolling stock must be smaller than the minimum work roll radius, otherwise the work roll bearings of the two opposite work rolls in the roll stand collide respectively would stand in their way. A diameter ratio that is as small as possible enables, in particular with a given inner diameter of the work roll bearings, the lowest possible overall height of the work roll chocks and thus small work roll diameters. Small work roll diameters are in turn suitable for rolling high-strength and very high-strength rolling stock, in particular in the rear roll stands of a rolling train, as has already been explained above. Small work roll diameters also make it easier to bend the work rolls, since the bending forces required for bending are reduced.
Bei einer weiteren Ausgestaltung der Walzvorrichtung ist ein Verhältnis einer Höhe eines Arbeitswalzeneinbaustücks zu einem Außendurchmesser eines Arbeitswalzenlagers wenigstens eines Bestückungssatzes kleiner als 1,09. Auch diese Ausgestaltung der Walzvorrichtung zielt auf die Reduzierung der Arbeitswalzendurchmesser durch Reduzierung der Höhe der Arbeitswalzeneinbaustücke. Bei vorgegebenem Innendurchmesser der Arbeitswalzenlager wird die Reduzierung der Höhe eines Arbeitswalzeneinbaustücks insbesondere in Kombination mit der oben genannten Reduzierung des Durchmesserverhältnisses des Außendurchmessers zu einem Innendurchmesser des Arbeitswalzenlagers ermöglicht.In a further configuration of the rolling device, a ratio of a height of a work roll chock to an outside diameter of a work roll bearing of at least one equipment set is less than 1.09. This configuration of the rolling device also aims to reduce the work roll diameter by reducing the height of the work roll chocks. For a given inner diameter of the work roll bearing, the reduction in the height of a work roll chock is particularly in combination with the above-mentioned reduction in the diameter ratio of the outside diameter to an inside diameter of the work roll bearing.
Bei einer weiteren Ausgestaltung der Walzvorrichtung ist eine minimale Wandstärke eines Arbeitswalzeneinbaustücks wenigstens eines Bestückungssatzes auf der dem Walzgut zugewandten Seite des Arbeitswalzeneinbaustücks kleiner als sechs Prozent eines Außendurchmessers eines Arbeitswalzenlagers des Arbeitswalzeneinbaustücks.In a further configuration of the rolling device, a minimum wall thickness of a work roll chock of at least one equipment set on the side of the work roll chock facing the rolling stock is less than six percent of an outer diameter of a work roll bearing of the work roll chock.
Bei einer weiteren Ausgestaltung der Walzvorrichtung ist eine minimale Wandstärke eines Arbeitswalzeneinbaustücks wenigstens eines Bestückungssatzes auf einer dem Walzgut zugewandten Seite höchstens so groß wie eine minimale Wandstärke auf einer von dem Walzgut abgewandten Seite des Arbeitswalzeneinbaustücks.In a further configuration of the rolling device, a minimum wall thickness of a work roll chock of at least one equipment set on a side facing the rolling stock is at most as great as a minimum wall thickness on a side of the work roll chock facing away from the rolling stock.
Die vorgenannten Ausgestaltungen der Walzvorrichtung berücksichtigen, dass sich mit abnehmenden Arbeitswalzendurchmessern die Arbeitswalzeneinbaustücke einander annähern und damit die Gefahr wächst, dass die Arbeitswalzeneinbaustücke kollidieren beziehungsweise sich im Wege stehen. Eine Reduzierung der minimale Wandstärken der Arbeitswalzeneinbaustücke auf deren dem Walzgut zugewandten Seiten vergrößert den Abstand der Arbeitswalzeneinbaustücke voneinander und ermöglicht dadurch eine weitere Reduzierung der Arbeitswalzendurchmesser, ohne dass die Arbeitswalzeneinbaustücke kollidieren beziehungsweise sich im Wege stehen.The aforementioned configurations of the rolling device take into account that with decreasing work roll diameters, the work roll chocks approach one another and thus the risk increases that the work roll chocks collide or get in each other's way. A reduction in the minimum wall thicknesses of the work roll chocks on their sides facing the rolling stock increases the distance between the work roll chocks and thereby enables a further reduction in the work roll diameter without the work roll chocks colliding or getting in the way.
Bei dem erfindungsgemäßen Verfahren zum Kaltwalzen von Walzgut mit einer Walzvorrichtung nach einem der vorhergehenden Ansprüche wird das Walzgerüst mit einem Bestückungssatz bestückt, der in Abhängigkeit von dem Walzgut ausgewählt wird. Dadurch werden insbesondere die Arbeitswalzendurchmesser der zum Walzen verwendeten Arbeitswalzen der Festigkeit, Breite, Einlaufdicke und/oder Auslaufdicke des Walzguts angepasst.In the method according to the invention for cold-rolling rolling stock with a rolling device according to one of the preceding claims, the roll stand is equipped with an equipment set that is selected depending on the rolling stock. As a result, the work roll diameters in particular are those used for rolling Work rolls adapted to the strength, width, entry thickness and/or exit thickness of the rolling stock.
Bei einer Ausgestaltung des erfindungsgemäßen Verfahrens wird das Walzgerüst mit einem Bestückungssatz bestückt, der in Abhängigkeit von einer Position der Walzvorrichtung in einer Walzstraße ausgewählt wird. Unter der Position einer Walzvorrichtung in einer (mehrgerüstigen) Walzstraße wird die Position verstanden, die das Walzgerüst der Walzvorrichtung in einer Abfolge aller Walzgerüste der Walzstraße einnimmt, in der das Walzgut die Walzgerüste durchläuft. Diese Ausgestaltung des erfindungsgemäßen Verfahrens berücksichtigt, dass sich entlang der Walzstraße die Festigkeit und Dicke des Walzguts sowie die Walzgeschwindigkeit und die erforderlichen Walzmomente ändern, wodurch wiederum die für den Walzprozess vorteilhaftesten Arbeitswalzendurchmesser der Arbeitswalzen einer Walzvorrichtung von der Position der Walzvorrichtung in der Walzstraße abhängen können.In one embodiment of the method according to the invention, the roll stand is equipped with an equipment set that is selected depending on a position of the rolling device in a rolling train. The position of a rolling device in a (multi-stand) rolling mill is understood to be the position that the rolling mill of the rolling mill occupies in a sequence of all rolling mills of the rolling mill in which the rolling stock passes through the rolling mills. This embodiment of the method according to the invention takes into account that the strength and thickness of the rolling stock as well as the rolling speed and the required rolling torques change along the rolling train, which in turn means that the work roll diameters of the work rolls of a rolling device that are most advantageous for the rolling process can depend on the position of the rolling device in the rolling train.
Bei einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens wird für wenigstens einen Bestückungssatz eine Biegungsgrenze für Positivbiegungen der Arbeitswalzen in Abhängigkeit von einer minimalen Wandstärke der Arbeitswalzeneinbaustücke auf den dem Walzgut zugewandten Seiten der Arbeitswalzeneinbaustücke festgelegt und die Arbeitswalzen werden nicht mehr als die Biegungsgrenze positiv gebogen. Diese Ausgestaltung des erfindungsgemäßen Verfahrens zielt insbesondere auf die oben genannte Ausgestaltung einer erfindungsgemäßen Walzvorrichtung, bei der minimale Wandstärken von Arbeitswalzeneinbaustücken auf dem Walzgut zugewandten Seiten reduziert werden. Eine Reduzierung dieser Wandstärken bewirkt eine Reduzierung der Belastbarkeit der Arbeitswalzeneinbaustücke bei Positivbiegungen der Arbeitswalzen. Die vorgenannte Ausgestaltung des erfindungsgemäßen Verfahrens berücksichtigt dies durch eine entsprechende Begrenzung von Positivbiegungen der Arbeitswalzen.In a further embodiment of the method according to the invention, a bending limit for positive bending of the work rolls is defined for at least one equipment set as a function of a minimum wall thickness of the work roll chocks on the sides of the work roll chocks facing the rolling stock, and the work rolls are not positively bent more than the bending limit. This embodiment of the method according to the invention is aimed in particular at the above-mentioned embodiment of a rolling device according to the invention, in which the minimum wall thicknesses of work roll chocks on the sides facing the rolling stock are reduced. A reduction in these wall thicknesses causes a reduction in the load-bearing capacity of the work roll chocks in the event of positive bending of the work rolls. The aforementioned embodiment of the method according to the invention takes this into account by appropriately limiting positive bending of the work rolls.
Bei einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens werden die Arbeitswalzen wenigstens eines Bestückungssatzes in Abhängigkeit von einer Balligkeit der Arbeitswalzen negativ gebogen. Auch diese Ausgestaltung des erfindungsgemäßen Verfahrens zielt auf eine Entlastung der Arbeitswalzeneinbaustücke bei Biegungen der Arbeitswalzen auf ihren dem Walzgut zugewandten Seiten, indem statt diese Seiten besonders belastenden Positivbiegungen bevorzugt mit einer Balligkeit der Arbeitswalzen zusammenwirkende Negativbiegungen der Arbeitswalzen durchgeführt werden, was eine geeignet gestaltete Balligkeit der Arbeitswalzen voraussetzt.In a further embodiment of the method according to the invention, the work rolls of at least one equipment set are bent negatively as a function of a crowning of the work rolls. This embodiment of the method according to the invention also aims to relieve the work roll chocks when the work rolls bend on their sides facing the rolling stock, in that instead of positive bends that particularly stress these sides, negative bends of the work rolls that preferably interact with a crowning of the work rolls are carried out, which results in a suitably designed crowning of the work rolls requires.
Bei einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens wird für wenigstens einen Bestückungssatz eine Axialverschiebung der Arbeitswalzen relativ zueinander in Abhängigkeit von einer Breite und Dicke des Walzguts eingestellt. Dadurch können die Bandkanten des Walzguts entlastet werden, beispielsweise um Kantenrisse der Bandkanten zu vermeiden, die ohne eine Entlastung der Bandkanten beim Walzen von kantenrissgefährdetem Walzgut, beispielsweise von Elektrobandstahl mit einem Siliziumgehalt von mindestens zwei Prozent, auftreten können. Außerdem kann durch eine derartige gegenseitige Axialverschiebung der Arbeitswalzen verhindert werden, dass sich Mittelbereiche der Arbeitswalzen, in denen die Arbeitswalzen ihren maximalen Arbeitswalzendurchmesser annehmen, beim Walzen sehr dünnen Walzguts im Bereich außerhalb des Walzguts berühren.In a further embodiment of the method according to the invention, an axial displacement of the work rolls relative to one another is set for at least one equipment set as a function of the width and thickness of the rolling stock. This allows the strip edges of the rolling stock to be relieved, for example in order to avoid edge cracks in the strip edges, which can occur without relieving the strip edges when rolling stock that is at risk of edge cracking, for example electrical strip steel with a silicon content of at least two percent. In addition, such a mutual axial displacement of the work rolls can prevent central areas of the work rolls, in which the work rolls assume their maximum work roll diameter, from touching in the area outside the rolling stock when rolling very thin rolled stock.
Eine erfindungsgemäße Walzstraße weist wenigstens eine erfindungsgemäße Walzvorrichtung auf. Die Vorteile einer derartigen Walzstraße ergeben sich aus den oben genannten Vorteilen einer erfindungsgemäßen Walzvorrichtung. Insbesondere ermöglicht eine erfindungsgemäße Walzstraße die Umrüstung der erfindungsgemäßen Walzvorrichtungen in Abhängigkeit von dem jeweiligen Walzgut, das heißt die Anpassung der Bestückung der Walzgerüste dieser Walzvorrichtungen an das Walzgut, und damit eine Bearbeitung unterschiedlichen Walzguts beziehungsweise die Herstellung unterschiedlicher Walzprodukte mit derselben Walzstraße.A rolling train according to the invention has at least one rolling device according to the invention. The advantages of such a rolling train result from the above-mentioned advantages of a rolling device according to the invention. In particular, a rolling mill train according to the invention allows the rolling devices according to the invention to be converted as a function of the respective rolling stock, that is to say the adjustment of the equipping of the roll stands Rolling devices on the rolling stock, and thus processing different rolling stock or the production of different rolled products with the same rolling train.
Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung von Ausführungsbeispielen, die im Zusammenhang mit den Zeichnungen näher erläutert werden. Dabei zeigen:
-
FIG 1 eine Schnittdarstellung eines Ausführungsbeispiels einer Walzvorrichtung im Bereich einer Arbeitswalze, -
FIG 2 Arbeitswalzen und ein zwischen den Arbeitswalzen durchgeführtes Walzgut, -
FIG 3 einen Arbeitswalzenzapfen, einen Spindelkopf und eine Antriebsspindel in einer Schnittdarstellung, -
FIG 4 ein Arbeitswalzeneinbaustück eines weiteren Ausführungsbeispiels einer Walzvorrichtung, -
FIG 5 schematisch eine Walzstraße mit vier Walzvorrichtungen.
-
FIG 1 a sectional view of an embodiment of a rolling device in the area of a work roll, -
FIG 2 work rolls and a rolling stock passed between the work rolls, -
3 a work roll neck, a spindle head and a drive spindle in a sectional view, -
FIG 4 a work roll chock of a further embodiment of a rolling device, -
5 schematically a rolling train with four rolling devices.
Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference symbols in all figures.
In
Jedes Arbeitswalzeneinbaustück 9 weist ein Arbeitswalzenlager 17 für einen Arbeitswalzenzapfen 16 einer Arbeitswalze 7, 8 auf. Das Arbeitswalzenlager 17 ist ein Wälzlager, beispielsweise ein Kegelrollenlager, mit einem Innendurchmesser d1, der zu dem Zapfendurchmesser d des Arbeitswalzenzapfens 16 korrespondiert, und einem Außendurchmesser D1. Die Innendurchmesser d1 der Arbeitswalzenlager 17 aller Bestückungssätze sind zumindest annähernd identisch; beispielsweise weichen sie höchstens zwei Prozent voneinander ab. Die Außendurchmesser D1 der Arbeitswalzenlager 17 der verschiedenen Bestückungssätze können sich dagegen signifikant voneinander unterscheiden. Beispielsweise nimmt ein Durchmesserverhältnis D1/d1 des Außendurchmessers D1 zu dem Innendurchmesser d1 eines Arbeitswalzenlagers 17 mit abnehmendem Walzendurchmesser D der Arbeitswalzen 7, 8 der Bestückungssätze ab. Beispielsweise beträgt dieses Durchmesserverhältnis für wenigstens einen Bestückungssatz, insbesondere für Bestückungssätze mit kleinen Arbeitswalzendurchmessern D, höchstens 1,32. Ferner ist ein Verhältnis A/D1 einer Höhe A eines Arbeitswalzeneinbaustücks 9 zu dem Außendurchmesser D1 des Arbeitswalzenlagers 17 des Arbeitswalzeneinbaustücke 9 für wenigstens einen Bestückungssatz, insbesondere für alle Bestückungssätze, vorzugsweise kleiner als 1,09.Each work roll chock 9 has a work roll bearing 17 for a
Zum Walzen eines Walzguts 3 mit der Walzvorrichtung 1 wird das Walzgerüst 5 mit den Arbeitswalzeneinbaustücken 9 und Arbeitswalzen 7, 8 eines Bestückungssatzes bestückt. Das Walzgerüst 5 weist dazu vier Halterungen 19, die jeweils ein Arbeitswalzeneinbaustück 9 aufnehmen und in denen die Arbeitswalzeneinbaustücke 9 vertikal verschiebbar sind, beispielsweise durch (nicht dargestellte) Hydraulikzylinder. Insbesondere können über die Halterungen 19 Biegekräfte auf die Arbeitswalzen 7, 8 ausgeübt werden. Durch eine Biegekraft in einer von dem Walzgut 3 weg gerichteten ersten Biegekraftrichtung 21 kann eine Arbeitswalze 7, 8 positiv gebogen werden. Dabei wird insbesondere eine dem Walzgut 3 zugewandte erste Lastzone 23 des Arbeitswalzeneinbaustücks 9 belastet, wobei in
Die Walzvorrichtung 1 des in
In das andere Ende des Spindelkopfes 11 ragt ein Ende der Antriebsspindel 27 hinein. Dieses Ende der Antriebsspindel 27 weist eine Außenverzahnung 29 auf, die zu einer Innenverzahnung 31 an einer Innenoberfläche des Spindelkopfes 11 korrespondiert, so dass Drehungen der Antriebsspindel 27 um ihre Längsachse auf den Spindelkopf 11 und über den Spindelkopf 11 auf den Arbeitswalzenzapfen 16 übertragen werden und die Arbeitswalze 7, 8 antreiben. Die Drehungen der Antriebsspindel 27 werden durch eine (nicht dargestellte) Antriebseinheit des Arbeitswalzenantriebs, beispielsweise durch einen Motor, erzeugt.One end of the
Eine Wandstärke, ein Außendurchmesser und die Innenverzahnung 31 des Spindelkopfes 11 sind auf das maximale Drehmoment des Arbeitswalzenantriebs für den Antrieb der Arbeitswalze 7, 8, der der Spindelkopf 11 zugeordnet ist, ausgelegt. Der Spindelkopf 11 ist ferner derart gestaltet, dass ein Winkel zwischen den Längsachsen der Antriebsspindel 27 und des Spindelkopfes 11 verstellbar ist, um eine Positionsänderung der Arbeitswalze 7, 8, beispielsweise nach einem Abschleifen der Arbeitswalze 7, 8, auszugleichen.A wall thickness, an outer diameter and the
Bei Verwendung derartiger Arbeitswalzeneinbaustück 9 wird vorzugsweise eine Biegungsgrenze für Positivbiegungen der Arbeitswalzen 7, 8 in Abhängigkeit von der minimalen Wandstärke W1 der Arbeitswalzeneinbaustücke 9 auf den dem Walzgut 3 zugewandten Seiten festgelegt und die Arbeitswalzen 7, 8 werden nicht mehr als die Biegungsgrenze positiv gebogen.When using such
Walzvorrichtungen 1 sind entlang einer Walzrichtung 37, in der das Walzgut 3 die Walzstraße 35 durchläuft, hintereinander angeordnet. Vorzugsweise sind alle Walzvorrichtungen 1 der Walzstraße 35 gleichartig hinsichtlich der Antriebsspindeln 27, Spindelköpfe 11, Arbeitswalzenzapfen 16 der Arbeitswalzen 7, 8 und Arbeitswalzeneinbaustücke 9 ausgebildet, so dass diese Komponenten zwischen den Walzvorrichtungen 1 austauschbar sind. Dies vereinfacht vorteilhaft die Ersatzteilvorhaltung und erhöht die Profitabilität der Walzstraße 35.
Erfindungsgemäß wird das Walzgerüst 5 einer Walzvorrichtung 1 mit einem Bestückungssatz bestückt, der in Abhängigkeit von dem Walzgut 3, insbesondere von dessen Festigkeit, Breite b, Einlaufdicke und/oder Auslaufdicke sowie von einer Position der Walzvorrichtung 1 in der Walzstraße 35 ausgewählt ist.According to the invention, the roll stand 5 of a rolling
Beispielsweise werden im Falle einer in
- 11
- Walzvorrichtungrolling device
- 33
- Walzgutrolling stock
- 55
- Walzgerüstmill stand
- 7, 87, 8
- Arbeitswalzestripper
- 99
- Arbeitswalzeneinbaustückwork roll chock
- 1111
- Spindelkopfspindle head
- 1313
- Mittelbereichmidrange
- 1515
- Fasechamfer
- 1616
- Arbeitswalzenzapfenwork roll neck
- 1717
- Lagercamp
- 1919
- Halterungbracket
- 21, 2221, 22
- Biegekraftrichtungdirection of bending force
- 23, 2423, 24
- Lastzoneload zone
- 2525
- Stützwalzebackup roll
- 2727
- Antriebsspindeldrive spindle
- 2929
- Außenverzahnungexternal teeth
- 3131
- Innenverzahnunginternal teeth
- 33, 3433, 34
- SeitePage
- 3535
- Walzstraßerolling mill
- 3737
- Walzrichtungrolling direction
- AA
- HöheHeight
- bb
- BreiteWidth
- DD
- Arbeitswalzendurchmesserwork roll diameter
- di.e
- Zapfendurchmesserspigot diameter
- D1D1
- Außendurchmesserouter diameter
- d1d1
- Innendurchmesserinner diameter
- W1, W2W1, W2
- minimale Wandstärkeminimum wall thickness
Claims (16)
- Rolling device (1) for the cold rolling of rolled stock (3), the rolling device (1) comprising- a rolling stand (5),- a plurality of equipment sets for the purpose of selectively equipping the rolling stand (5) with one of the equipment sets, and- a working roller drive, wherein- each equipment set has two working rollers (7, 8) and, for each working roller (7, 8), two working roller chocks (9) assigned to the working roller (7, 8), each of which has at least one working roller bearing (17) for the working roller (7, 8), and a spindle head (11), which is assigned to the working roller (7, 8) and can be connected to a working roller journal (16) of the working roller (7, 8) in a form-fitting manner,- the rolling stand (5) has mounts (19) for a respective working roller chock (9) of one equipment set, and- the working roller drive has two drive spindles (27) which are respectively designed to drive a working roller (7, 8) via the spindle head (11) assigned to the working roller (7, 8) by rotations about a longitudinal axis of the drive spindle (27),- wherein the working rollers (7, 8) have a working roller diameter range, each of which is determined by a minimum working roller diameter and a maximum working roller diameter of the working roller (7, 8), characterized in that the working rollers (7, 8) of one equipment set have the same working roller diameter range and the working rollers (7, 8) of different equipment sets have working roller diameter ranges that differ from one another.
- Rolling device (1) according to Claim 1, wherein the minimum working roller diameter of the working rollers (7, 8) of one equipment set differs from the maximum working roller diameter by 40 mm to 90 mm.
- Rolling device (1) according to Claim 1 or 2, wherein the working rollers of one equipment set have a minimum working roller diameter of 340 mm and a maximum working roller diameter of 385 mm, and the working rollers of another equipment set have a minimum working roller diameter of 375 mm and a maximum working roller diameter of 460 mm.
- Rolling device (1) according to one of the preceding claims, wherein the inside diameters (d1) of the working roller bearings (17) of all equipment sets deviate from one another by at most two percent.
- Rolling device (1) according to one of the preceding claims, wherein the working roller journals (16) of the working rollers (7, 8) of all equipment sets have identical journal diameters (d) and journal shapes.
- Rolling device (1) according to one of the preceding claims, wherein a diameter ratio of an outside diameter (D1) to an inside diameter (d1) of a working roller bearing (17) decreases as the working roller diameter range of the equipment sets decreases.
- Rolling device (1) according to one of the preceding claims, wherein a diameter ratio of an outside diameter (D1) to an inside diameter (d1) of the working roller bearings (17) of at least one equipment set is at most 1.41, and wherein a diameter ratio of an outside diameter (D1) to an inside diameter (d1) of the working-roller bearings (17) of at least one other equipment set is at most 1.32.
- Rolling device (1) according to one of the preceding claims, wherein a ratio of a height (A) of a working roller chock (9) to an outside diameter (D1) of a working roller bearing (17) of at least one equipment set is less than 1.09.
- Rolling device (1) according to one of the preceding claims, wherein a minimum wall thickness (W1) of a working roller chock (9) of at least one equipment set on that side (33) of the working roller chock (9) that faces towards the rolled stock (3) is less than six percent of an outside diameter (D1) of a working roller bearing (17) of the working roller chock (9).
- Rolling device (1) according to one of the preceding claims, wherein a minimum wall thickness (W1) of a working roller chock (9) of at least one equipment set on a side (33) facing towards the rolled stock (3) is at most as great as a minimum wall thickness (W2) on a side (34) of the working roller chock (9) that faces away from the rolled stock (3).
- Method for the cold rolling of rolled stock (3) by a rolling device (1) as claimed in one of the preceding claims, wherein the rolling stand (5) is equipped with an equipment set which is selected depending on the rolled stock (3).
- Method according to Claim 11, wherein the rolling stand (5) is equipped with an equipment set which is selected depending on a position of the rolling device (1) in a rolling train (35).
- Method according to Claim 11 or 12, wherein for at least one equipment set a bending limit for positive bending of the working rollers (7, 8) is set as a function of a minimum wall thickness (W1) of the working roller chocks (9) on the sides (33) of the working roller chocks (9) that face towards the rolled stock (3), and the working rollers (7, 8) are not positively bent above the bending limit.
- Method according to one of Claims 11 to 13, wherein the working rollers (7, 8) of at least one equipment set are negatively bent depending on a crown of the working rollers (7, 8).
- Method according to one of Claims 11 to 14, wherein for at least one equipment set an axial displacement of the working rollers (7, 8) relative to one another is set as a function of a width and thickness of the rolled stock (3).
- Rolling train (35) having at least one rolling device (1) according to one of Claims 1 to 10.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19186746.4A EP3766595A1 (en) | 2019-07-17 | 2019-07-17 | Cold rolling of rolled material |
PCT/EP2020/069895 WO2021009174A1 (en) | 2019-07-17 | 2020-07-14 | Cold rolling of rolled stock |
Publications (3)
Publication Number | Publication Date |
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EP3999259A1 EP3999259A1 (en) | 2022-05-25 |
EP3999259C0 EP3999259C0 (en) | 2023-09-06 |
EP3999259B1 true EP3999259B1 (en) | 2023-09-06 |
Family
ID=67402849
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Application Number | Title | Priority Date | Filing Date |
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EP19186746.4A Withdrawn EP3766595A1 (en) | 2019-07-17 | 2019-07-17 | Cold rolling of rolled material |
EP20742679.2A Active EP3999259B1 (en) | 2019-07-17 | 2020-07-14 | Cold rolling of rolled material |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP19186746.4A Withdrawn EP3766595A1 (en) | 2019-07-17 | 2019-07-17 | Cold rolling of rolled material |
Country Status (4)
Country | Link |
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US (1) | US20220258220A1 (en) |
EP (2) | EP3766595A1 (en) |
CN (1) | CN114080279B (en) |
WO (1) | WO2021009174A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200918195A (en) * | 2007-03-14 | 2009-05-01 | Ihi Metaltech Co Ltd | Switchable multistage rolling mill |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE856735C (en) * | 1950-04-23 | 1952-11-24 | Erich Schulte | Device for exchanging sets of rolls to be exchanged |
GB1376605A (en) * | 1971-04-15 | 1974-12-11 | Wean United Inc | Rolling mill with roll change arrangement |
US4238947A (en) * | 1979-05-09 | 1980-12-16 | National Steel Corporation | Work roll chock assembly for a rolling mill |
JPS6137306A (en) * | 1984-07-30 | 1986-02-22 | Hitachi Ltd | Rolling mill |
US5746081A (en) * | 1993-03-27 | 1998-05-05 | Sms Schloemann-Siegmag Aktiengesellschaft | Reversing compact installation for cold rolling strip-shaped rolling material |
DE102011087605A1 (en) * | 2011-12-01 | 2013-06-06 | Sms Siemag Ag | Chock and process for its manufacture |
CN104438318B (en) * | 2013-09-16 | 2016-04-27 | 钱钢 | The interchangeable cold-rolling mill of a kind of multiple roll |
JP6197890B2 (en) * | 2014-02-14 | 2017-09-20 | 東芝三菱電機産業システム株式会社 | Electric motor speed control device for rolling mill |
CN207981856U (en) * | 2018-02-08 | 2018-10-19 | 天津海钢板材有限公司 | A kind of Quick Release quick assembling mechanism used for cold rolling mill |
CN109647894A (en) * | 2018-12-30 | 2019-04-19 | 衡阳市鑫诚和重型机械设备制造有限公司 | Mill roll changing device and its roll-changing method |
-
2019
- 2019-07-17 EP EP19186746.4A patent/EP3766595A1/en not_active Withdrawn
-
2020
- 2020-07-14 EP EP20742679.2A patent/EP3999259B1/en active Active
- 2020-07-14 CN CN202080051553.3A patent/CN114080279B/en active Active
- 2020-07-14 US US17/626,949 patent/US20220258220A1/en active Pending
- 2020-07-14 WO PCT/EP2020/069895 patent/WO2021009174A1/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW200918195A (en) * | 2007-03-14 | 2009-05-01 | Ihi Metaltech Co Ltd | Switchable multistage rolling mill |
Also Published As
Publication number | Publication date |
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EP3766595A1 (en) | 2021-01-20 |
EP3999259C0 (en) | 2023-09-06 |
EP3999259A1 (en) | 2022-05-25 |
WO2021009174A1 (en) | 2021-01-21 |
CN114080279B (en) | 2023-07-11 |
CN114080279A (en) | 2022-02-22 |
US20220258220A1 (en) | 2022-08-18 |
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