RU2787127C1 - Cold rolling of rolled stock - Google Patents

Abstract

FIELD: mill products.

SUBSTANCE: invention relates to a rolling machine. The rolling machine contains a rolling mill, tooling kits for selectively equipping the rolling mill with one of the specified tooling kits and a drive of working rolls. Each set of equipment has two working rolls and for each working roll, two roll carriages coordinated with the working roll, which have a support of the working roll, and a spindle head coordinated with the working roll, which is made with the possibility of connection to the working roll neck. The rolling mill has holders for one roll carriage of the tooling kit. The drive of the working rolls has two driving spindles, which in each case are designed to drive the working roll through a spindle head coordinated with the working roll.

EFFECT: as a result, it is possible to produce various rolling products.

16 cl, 5 dwg

Description

The invention relates to a rolling device, a method and a rolling mill for cold rolling of rolled material.

During cold rolling, a rolled material, such as a metal strip, is passed between two work rolls, which are separated from each other by a rolling gap. The work rolls are located in the rolling stand and rotate by means of a drive around their longitudinal axes. Frequently, several rolling stands are arranged one behind the other and form a so-called rolling mill, through which the rolled material passes in the rolling direction, the thickness of the rolled material gradually decreasing. In typical applications, the rolling speed increases from rolling stand to rolling stand and the rolling torques decrease from rolling stand to rolling stand. However, the number of rolling stands and the maximum reduction in thickness cannot be arbitrarily increased for technological reasons, since the strength of the rolled material increases depending on the reduction in thickness. With certain values of the strength of the rolled material and the diameters of the work rolls, this leads to high flattening of the work rolls and a reduced reduction in the thickness of the rolled material.

In most cases, the rolling stand has, in addition to the work rolls, so-called back-up rolls which support the work rolls. Each roll is rotatably mounted at its ends on supports, which in each case are supported by a so-called chock, which is vertically displaceable in a rolling stand holder. Due to the possibility of vertical displacement of the chocks, the positions of the rolls can be changed and adapted to each other and to the thickness of the rolled material. Through the work roll chocks, bending forces can then be applied to the work rolls, by means of which the work rolls are slightly bent during rolling in order to achieve a uniform thickness of the rolled material in the axial direction, i.e. along the longitudinal axes of the work rolls.

The work rolls wear out during the rolling of the rolled material. The work rolls are therefore ground in each case after a certain rolling time has elapsed. As a result, the diameters of the work rolls are gradually reduced. Finally, the work rolls are replaced when their diameters are reduced by grinding to the minimum work roll diameter. The diameter of a work roll used for the first time is equal to the maximum work roll diameter and can be reduced by repeated grinding to a minimum work roll diameter. The difference between the maximum and minimum work roll diameters is determined, in particular, by the so-called hardening depth, which defines a region extending from the surface of the work roll in the radial direction inwards, which has a greater hardness than the rest of the work roll material. Only if the current work roll diameter is between the corresponding maximum and minimum work roll diameters - and thus the current work roll surface is in a region of greater hardness than the rest of the work roll body - is the work roll used in the rolling stand. The minimum and maximum work roll diameters thus determine the diameter range of this work roll, within which the work roll can be used expediently for rolling: if the work roll diameter were to leave the work roll diameter range due to further grinding, the work roll is no longer used.

The minimum work roll diameter is further determined by the rolling parameters (rolling moment, rolling force, rolling pull forces, rolling speed) and their influence on the choice of work roll supports and work roll necks on which the work rolls are driven and which in turn determine the minimum inner diameter of work roll supports. The outer diameter and width of the work roll support determine the capacity of the work roll support. The recommended minimum wall thickness of the work roll chock is consistent with the outside diameter and load of the work roll support. Thus, the dimensions of the work roll supports, the wall thicknesses of the work roll chocks and the safety distance which must prevent collision between the work rolls and the work roll chocks determine the minimum usable work roll diameter. Rolling parameters are determined in turn by the properties of the rolled material, as well as its input thickness, output thickness and width.

Thus, a relatively soft rolling material with a large width and thickness and a high required reduction in thickness, for example more than 80 percent, places high demands on torque in particular on the first two rolling stands of the rolling mill and causes high thermal loads on the components of the rear rolling stands. Therefore, for such rolling of soft rolling material, large work roll diameters are preferred.

Rolling of high and maximum strength rolled material with exit thicknesses of, for example, more than 0.5 mm results in high rolling forces on all rolling stands and in particular a reduced thickness reduction capability on the rear rolling stands (e.g. third and fourth rolling stands) compared to softer rolled material. The torque requirements are in the higher and maximum range. The rolling of very thin, high-strength rolled stock, for example for the production of electrical steel strip with a relatively high silicon content and exit thicknesses of less than 0.5 mm, results in 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 back rolling stands, so that in these cases, in particular on the back rolling stands, small work roll diameters are preferred.

The invention is based on the object of specifying a rolling device, a process and a rolling mill which make it possible to manufacture various rolled products, in particular rolled products of different hardness and thickness.

The problem is solved according to the invention using a rolling stand with the characteristics of paragraph 1 of the claims, using a method with the features of paragraph 10 of the claims and using a rolling mill with the features of paragraph 15 of the claims.

Preferred embodiments of the invention are the subject of the dependent claims.

The rolling device according to the invention for cold rolling of rolled material includes a rolling stand, several tooling sets for optionally equipping the rolling stand with one of the tooling sets, and a work roll drive. Each tooling set includes two work rolls and, for each work roll, two work roll chocks matched to the work roll, which in each case have at least one work roll support for the work roll, and a spindle head matched to the work roll, which can be positively connected to the neck of the work roll. The work rolls of the same tooling set have in each case the same range of work roll diameters. The work rolls of different tooling sets have different work roll diameter ranges, whereby the work roll diameter range of one tooling set differs from the work roll diameter range of another tooling set if at least the minimum or maximum work roll diameter of the work rolls of one tooling set of the tooling differs from the corresponding minimum or maximum work roll diameter of the work rolls of another tooling set. The rolling stand has holders, which are made in each case to receive the chock of the work roll of the tooling set. The work roll drive has two drive spindles, which in each case are designed to drive the work roll through a spindle head matched to the work roll by rotating about the longitudinal axis of the drive spindle.

The rolling stand of the rolling device according to the invention can thus be equipped with work rolls of various work roll diameter ranges. To do this, each set of equipment includes work roll cushions corresponding to both of its work rolls in order to install work rolls in the rolling stand, and for each work roll a spindle head corresponding to it, through which the work roll can be driven by the drive spindle of the work roll drive . In this way, the rolling stand can advantageously be adapted to the respective rolling material. Thus, for example, work rolls of a smaller work roll diameter can be used for rolling high-strength rolled material than for rolling relatively soft rolled material. Different assembly heights of tooling sets with work rolls of different ranges of work roll diameters can be compensated for by the possibility of vertical displacement of the chocks in the rolling stand. As a consequence, the rolling device according to the invention is suitable for a wide range of manufactured rolling products. In particular, the invention seeks to be able to cost-effectively process both relatively soft rolled material and to produce high-quality high-strength steel products with low thicknesses, for example thicknesses of less than 0.5 mm, with the same rolling device.

In the embodiment of the rolling device, the work roll supports of all sets of equipment are made in the form of rolling bearings, for example, in the form of tapered roller bearings.

In a further embodiment of the rolling device, the minimum diameter of the work roll differs by 40-90 mm from the maximum diameter of the work roll of the tooling set.

In a further embodiment of the rolling device, the work rolls of one tooling 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 set of tools have a minimum work roll diameter of 375 mm and a maximum work roll diameter of 460 mm . As a result, the rolling stand can only be adapted by changing the set of equipment for rolling rolled material of maximum strength, for which roll diameters of less than 375 mm are required. As a result, conditions are advantageously created at low cost for expanding the range of products to be produced.

Preferably, the internal diameters of the work roll supports of all sets of tooling differ from each other by a maximum of two percent. As a result, work rolls with work roll necks of the same neck diameter can be used, so that also the spindle heads have the same inner diameter and the work rolls of all tooling sets can be driven by the same drive spindles. Therefore, drive spindles should not be replaced when converting the rolling stand to work rolls of a different work roll diameter. Accordingly, a further embodiment of the rolling device provides that the work roll necks of all tool sets have identical neck diameters and neck shapes.

The ratio of the outer diameter to the inner diameter of the work roll support can decrease with a decrease in the range of work roll diameters of the work rolls of the tooling sets. For example, the ratio of the outer diameter to the inner diameter of the work roll supports of at least one tooling set is at most 1.41, and the ratio of the outer diameter to the inner diameter of the work roll supports of at least one other set of tools is at the most 1.32. The rolling stand can be adapted to the relevant grades of rolled material by selecting a set of equipment with the appropriate ratio of work roll support diameters. Reducing the ratio of the diameters of the work roll supports to the diameter of the work roll takes into account that the sum of the outer radius of the work roll supports and the wall thickness of the work roll chocks on the sides facing the rolled material must be less than the minimum radius of the work roll, since otherwise the work roll supports of both opposite work rolls would collide in the rolling stand or interfere with each other. The smallest possible diameter ratio creates the conditions, in particular for a given inner diameter of the work roll supports, for the lowest possible installation height of the work roll chocks and thus for small work roll diameters. Small work roll diameters are in turn suitable for rolling rolled material of high and maximum strength, in particular in the rear rolling stands of a rolling mill, as already mentioned above. In addition, small work roll diameters make it easier to bend the work rolls, since the bending forces required for bending are reduced.

In a further embodiment of the rolling device, the ratio of the height of the work roll cushion to the outer diameter of the work roll support of at least one set of tooling is less than 1.09. Also, this embodiment of the rolling device is aimed at reducing the diameters of the work roll by reducing the height of the work roll chocks. With a given inner diameter of the work roll supports, conditions are created for reducing the height of the work roll chock, in particular in combination with the aforementioned reduction in the ratio of the outer diameter to the inner diameter of the work roll support.

In a further embodiment of the rolling device, the minimum wall thickness of the work roll chock of at least one set of tooling on the side of the work roll chock facing the rolled material is less than six percent of the outer diameter of the work roll chock of the work roll chock.

In a further embodiment of the rolling device, the minimum wall thickness of the work roll chock of at least one set of tooling on the side facing the rolling stock has a maximum dimension equal to the minimum wall thickness on the side of the work roll chock turned away from the rolled material.

The above embodiments of the rolling device take into account that as the work roll diameters decrease, the work roll chocks approach each other and thus the risk that the work roll chocks collide or interfere with each other increases. Reducing the minimum wall thicknesses of the work roll chocks on their material-facing sides increases the distance between the work roll chocks and thereby creates conditions for further reduction in work roll diameters without the work roll chocks colliding or interfering with each other.

In the method according to the invention for cold rolling a rolled material with a rolling device according to any one of the preceding claims, the rolling stand is equipped with a tooling set which is selected depending on the rolled material. As a result, in particular, the diameters of the work rolls used for rolling are adapted to the strength, width, entry thickness and/or exit thickness of the rolled material.

In an embodiment of the method according to the invention, the rolling stand is equipped with a set of equipment, which is selected depending on the position of the rolling device in the rolling mill. The position of the rolling device in a (multi-stand) rolling mill is understood to mean the position that the rolling stand of the rolling device occupies in the sequence of all rolling stands of the rolling mill, in which the rolling stock passes through the rolling stands. This embodiment of the method according to the invention takes into account that the strength and thickness of the rolled material, as well as the rolling speed and the required rolling torques, vary along the rolling mill, as a result of which, in turn, the diameters of the work rolls of the rolling device that are most preferable for the rolling process can depend on the position of the rolling device in rolling mill.

In a further embodiment of the method according to the invention, for at least one set of tooling, a bending limit is set for positive bends of the work rolls depending on the minimum wall thickness of the work roll chocks on the sides of the work roll chocks facing the rolled material, and the work rolls are positively bent no more than bend limit. This embodiment of the method according to the invention is directed in particular to the aforementioned embodiment of the rolling device according to the invention, in which the minimum wall thicknesses of the work roll chocks on the sides facing the rolled material are reduced. Reducing these wall thicknesses causes a decrease in the bearing capacity of the work roll chocks with positive work roll bends. The above embodiment of the method according to the invention takes this into account by appropriately limiting the positive bending of the work rolls.

In a further embodiment of the method according to the invention, the work rolls of at least one set of toolings are bent negatively depending on the pressure of the work rolls. Also, this embodiment of the method according to the invention is aimed at unloading the work roll chocks when the work rolls are bent on their sides facing the rolled material, due to the fact that instead of the positive bends that most load these sides, negative bends of the work rolls interacting with the work roll bombardment are preferably implemented, which provides properly performed bombardment of work rolls.

In a further embodiment of the method according to the invention, an axial displacement of the work rolls relative to each other is set for at least one set of equipment depending on the width and thickness of the rolled material. As a result, the edges of the strip of rolling material can be relieved in order to prevent, for example, edge cracks at the edges of the strip, which, without unloading the edges of the strip, can occur when rolling a rolling material prone to edge cracking, for example a strip of electric steel with a silicon content of at least two percent. In addition, due to such mutual axial displacement of the work rolls, it can be prevented that the middle areas of the work rolls, in which the work rolls take on their maximum work roll diameters, come into contact when rolling a very thin rolling material in a region outside the rolling material.

The rolling mill according to the invention has at least one rolling device according to the invention. The advantages of such a rolling mill result from the above-mentioned advantages of the rolling device according to the invention. In particular, the rolling mill according to the invention makes it possible to retrofit the rolling devices according to the invention depending on the respective rolling material, i.e. to adapt the equipment of the rolling stands of these rolling devices to the rolling material and thus process different rolling materials or produce different rolling products with the same rolling mill.

The above described features, features and advantages of this invention, as well as the way to achieve them, become clearer and more understandable in connection with the following description of exemplary embodiments, which are explained in more detail in conjunction with the drawing. In this case, the drawing shows:

fig. 1 is a sectional view of an embodiment of a rolling device in the area of a work roll;

fig. 2 - work rolls and rolling material passing between the work rolls;

fig. 3 - the neck of the work roll, the spindle head and the drive spindle in the sectional image;

fig. 4 shows the work roll chock of a further exemplary embodiment of the rolling device; and

fig. 5 schematically shows a rolling mill with four rolling devices.

Elements corresponding to each other are provided with the same reference numerals throughout the figures.

Fig. 1 shows a sectional view of an exemplary embodiment of a rolling device 1 according to the invention for cold rolling a rolled material 3. The rolling device 1 includes a rolling stand 5, several tooling sets for optionally equipping the rolling stand 5 with one of the tooling sets, and a work roll drive. Each set of equipment includes two work rolls 7, 8 and for each work roll 7, 8 two work roll cushions 9 matched with the work roll 7, 8 and a spindle head 11 consistent with the work roll 7, 8. Both work rolls 7, 8 of one set of equipment have the same range of work roll diameters, work rolls 7, 8 of different sets of equipment have different ranges of work roll diameters.

Fig. 2 shows the work rolls 7, 8 of one set of equipment and the rolling material 3 passing between the work rolls 7, 8 with a width b. The diameter D of the work roll 7, 8 is the maximum diameter of the work roll 7, 8 and is taken up by the work roll 7, 8 in the middle region 13 which is ground to an approximately round cylindrical shape and generally to a bombed or bottle shape. The end of the middle region 13 of each work roll 7, 8 has a chamfer 15, with the chamfers 15 of both work rolls 7, 8 facing each other. Each end area of the work roll 7, 8 is made in the form of a work roll neck 16, the diameter d of which is smaller than the diameter D of the work roll. The diameters d of the neck of the work rolls 7, 8 of all sets of equipment are the same.

In FIG. 2, the work rolls 7, 8 are axially displaced relative to each other in such a way that the chamfers 15 of both work rolls 7, 8 are located in each case in the region of one of the two side edges of the strip of rolled material 3. As a result, the edges of the strip of rolled material 3 are unloaded at rolling in order, for example, to prevent edge cracks at the strip edges, which, without unloading the strip edges, can occur during rolling of a rolling material 3 prone to edge cracking, for example strip made of electric steel with a silicon content of at least two percent. In addition, due to such a mutual axial displacement of the work rolls 7, 8, it can be prevented that the middle regions 13 of the work rolls 7, 8 come into contact when rolling a very thin rolling material 3 in a region outside the rolling material 3.

Each work roll chock 9 has a work roll support 17 for the work roll neck 16 7, 8. The work roll support 17 is a rolling bearing, such as a tapered roller bearing, with an inner diameter d1 that corresponds to the diameter d of the work roll neck 16 and an outer diameter D1 . The inner diameters d1 of the work roll supports 17 of all tool sets are at least approximately identical; for example, they differ from each other by a maximum of two percent. The outer diameters D1 of the supports 17 of the work roll of different sets of equipment can differ significantly from each other. For example, the ratio D1/d1 of the outer diameter D1 to the inner diameter d1 of the work roll support 17 decreases as the diameter D of the work rolls 7, 8 of the tooling sets decreases. For example, this diameter ratio is for at least one set of tooling, in particular for sets of tooling with small diameters D of the work roll, a maximum of 1.32. Further, the ratio A/D1 of the height A of the work roll chock 9 to the outer diameter D1 of the work roll support 17 of the work roll chock 9 is preferably less than 1.09 for at least one tool set, in particular for all tool sets.

For rolling the rolled material 3 by the rolling device 1, the rolling stand 5 is equipped with work roll chocks 9 and work rolls 7, 8 of the equipment set. For this, the rolling stand 5 has four holders 19, which in each case receive the work roll chock 9, and in which the work roll chocks 9 can be displaced in the vertical direction, for example by means of (not shown) hydraulic cylinders. In particular, bending forces can be applied to the work rolls 7, 8 via the holders 19. Due to the bending force in the first direction 21 of the bending force directed away from the rolling material 3, the work roll 7, 8 can be positively bent. In this case, in particular, the first load zone 23 of the work roll chock 9 facing the rolling material 3 is loaded, wherein in FIG. 1, the forces involved are shown by arrows in the first load zone 23 . Due to the bending force in the second bending force direction 22 directed towards the rolling material 3, the work roll 7, 8 can be bent negatively. In this case, in particular, the second load zone 24 of the work roll chock 9, which is turned away from the rolling material 3, is loaded, and in FIG. 1, the forces involved are shown by arrows in the second load zone 24 .

The rolling device 1 shown in FIG. 1 of the exemplary embodiment further has back-up rolls 25 which are located above and below the holders 19 and can be moved in the vertical direction so that their positions can be adapted to the work roll diameters D and the positions of the work rolls 7, 8.

Fig. 3 shows the neck 16 of the work roll 7, 8, the spindle head 11 matched to the work roll 7, 8 and the drive spindle 27 of the work roll drive of the rolling device 1 in a sectional view. The spindle head 11 is made tubular. The end of the spindle head 11 facing the neck 16 of the work roll forms an opening, the cross section of which corresponds to the cross section of the end of the neck 16 of the work roll, and into which the end of the neck 16 of the work roll protrudes. The cross section of the end of the neck 16 of the work roll is not round, but has, for example, the shape of a circle from which two circular segments extending from each other by means of central symmetry at the center of the circle are cut. As a result, the spindle head 11 and the end of the neck 16 of the work roll are connected to each other in a form-fitting manner.

At the other end of the spindle head 11 protrudes the end of the drive spindle 27. This end of the drive spindle 27 has an external gear rim 29, which is matched with an internal gear rim 31 on the inner surface of the spindle head 11, so that the rotations of the drive spindle 27 about its longitudinal axis are transmitted to the spindle head 11 and through the spindle head 11 onto the work roll neck 16 and drive the work roll 7, 8. The rotations of the drive spindle 27 are generated by a (not shown) work roll drive unit, such as a motor.

The wall thickness, outer diameter and inner ring gear 31 of the spindle head 11 are designed for the maximum torque of the drive of the work rolls to drive the work roll 7, 8, with which the spindle head 11 is matched. Further, the spindle head 11 is made in such a way that the angle between the longitudinal the axes of the drive spindle 27 and the spindle head 11 can be adjusted in order to compensate for the change in the position of the work roll 7, 8, for example, after grinding the work roll 7, 8.

Fig. 4 shows the work roll chock 9 of a further embodiment of the rolling device 1. The work roll chock 9 has, on the side 33 facing the rolled stock 3, a minimum wall thickness W1 which is smaller than the minimum wall thickness W2 on the side 34 turned away from the rolled stock 3. For example, the minimum wall thickness W1 on the side 33 facing the rolled material 3 is less than six percent of the outer diameter D1 of the work roll support 17 of the work roll chock 9. When such a work roll chock 9 is used, a bending limit is preferably set for positive bending of the work rolls 7, 8 depending on the minimum wall thickness W1 of the work roll chocks 9 on the sides 3 facing the rolled material, and the work rolls 7, 8 positively bend no more than bend limit.

Fig. 5 schematically shows a rolling mill 35 with four rolling devices 1 according to the invention. The rolling devices 1 are arranged one behind the other in the rolling direction 37, in which the rolling material 3 passes the rolling mill 35. Preferably, all rolling devices 1 of the rolling mill 35 are identical with respect to the drive spindles. 27, spindle heads 11, work roll necks 16 7, 8 and work roll chocks 9, so that these components can be exchanged between rolling devices 1. This advantageously simplifies the maintenance of spare parts and increases the profitability of the rolling mill 35.

According to the invention, the rolling stand 5 of the rolling device 1 is equipped with a tooling set, which is selected depending on the rolling material 3, in particular on its strength, width b, entry thickness and/or exit thickness, and also on the position of the rolling device 1 in the rolling mill 35. For example, in the case shown in FIG. 5 of a four-stand rolling mill 35, the rolling stands 5 of both rear rolling devices 1 are equipped for the production of thin rolled material 3 of high and maximum strength, for example strip of electric steel with silicon content, work rolls 7, 8, the diameters D of which are smaller than the diameters D of the work rolls 7 , 8, with which the rolling stands 5 of both front rolling devices 1 are equipped. For example, both rear rolling devices 1 are equipped with work rolls 7, 8 with work roll diameters D of max. The front rolling devices 1 are equipped with work rolls 7, 8 with work roll diameters D of a maximum of 400-490 mm (depending on the width b of the rolled material 3).

LIST OF REFERENCES

1 rolling device

3 rolling material

5 rolling stand

7, 8 work roll

9 work roll chock

11 spindle head

13 middle area

15 chamfer

16 work roll neck

17 support/bearing

19 holder

21, 22 direction of bending force

23, 34 load zone

25 backup roll

27 drive spindle

29 outer ring gear

31 internal ring gear

33, 34 side

35 rolling mill

37 rolling direction

A height

b width

D work roll diameter

d neck diameter

D1 outside diameter

d1 inside diameter

W1, W2 minimum wall thickness

Claims (22)

1. Rolling device (1) for cold rolling of rolled material (3), including - rolling stand (5), - tooling kits for optionally equipping the rolling stand (5) with one of the specified tooling kits and - work roll drive, and - each set of equipment has two work rolls (7, 8) and for each work roll (7, 8) two work roll pads (9) matched with the work roll (7, 8), which in each case have at least one support (17) of the work roll for the work roll (7, 8), and a spindle head (11) matched with the work roll (7, 8), which is configured to be positively connected to the neck (16) of the work roll (7, 8) , moreover, the work rolls (7, 8) have a range of work roll diameters, which is determined in each case by the minimum diameter and the maximum diameter of the work roll (7, 8), and the work rolls (7, 8) of one set of equipment have the same range of work roll diameters , and work rolls (7, 8) of different sets of equipment have different ranges of work roll diameters, - the rolling stand (5) has holders (19) in each case for one chock (9) of the tooling set work roll, and - the drive of the work rolls has two drive spindles (27), which in each case are designed to drive the work roll (7, 8) through the spindle head (11) coordinated with the work roll (7, 8) by rotating around the longitudinal axis of the drive spindle (27). 2. Rolling device (1) according to claim 1, wherein the minimum diameter of the work roll of the work rolls (7, 8) of the set of equipment differs by 40-90 mm from the maximum diameter of the work roll. 3. Rolling device (1) according to claim 1 or 2, wherein the work rolls of one set of equipment have a minimum work roll diameter of 340 mm and a maximum work roll diameter of 385 mm, and work rolls of another set of equipment have a minimum work roll diameter of 375 mm and a maximum work roll diameter of 460 mm. 4. Rolling device (1) according to any one of claims 1 to 3, wherein the inner diameters (d1) of the work roll supports (17) of all sets of equipment differ from each other by a maximum of two percent. 5. Rolling device (1) according to any one of claims 1 to 4, wherein the necks (16) of the work rolls (7, 8) of all tool sets have identical neck diameters (d) and neck shapes. 6. Rolling device (1) according to any one of claims 1 to 5, wherein the ratio of the outer diameter (D1) to the inner diameter (d1) of the work roll support (17) decreases with a decrease in the range of diameters of the work roll of the tooling sets. 7. Rolling device (1) according to any one of claims 1 to 6, wherein the ratio of the outer diameter (D1) to the inner diameter (d1) of the supports (17) of the work roll of at least one set of equipment is a maximum of 1.41, and moreover, the ratio outer diameter (D1) to the inner diameter (d1) of the work roll supports (17) of at least one other tooling set is a maximum of 1.32. 8. Rolling device (1) according to any one of claims 1 to 7, wherein the ratio of the height (A) of the cushion (9) of the work roll to the outer diameter (D1) of the support (17) of the work roll of at least one set of equipment is less than 1.09 . 9. Rolling device (1) according to any one of claims 1 to 8, wherein the minimum thickness (W1) of the wall of the pillow (9) of the work roll of at least one set of equipment on the side (33) of the pillow (9) facing the rolling material (3) ) work roll is less than six percent of the outer diameter (D1) of the work roll support (17) of the work roll chock (9). 10. Rolling device (1) according to any one of claims 1 to 9, wherein the minimum thickness (W1) of the wall of the cushion (9) of the work roll of at least one set of equipment on the side (33) facing the rolling material (3) has a maximum of such dimension as the minimum wall thickness (W2) on the side (34) of the pad (9) of the work roll facing away from the rolled material (3). 11. Method for cold rolling a rolled material (3) with a rolling device (1) according to any one of claims 1 to 10, wherein the rolling stand (5) is equipped with a tooling set, which is selected depending on the rolled material (3). 12. The method according to claim 11, wherein the rolling stand (5) is equipped with a tooling set, which is selected depending on the position of the rolling device (1) in the rolling mill (35). 13. The method according to claim 11 or 12, moreover, for at least one set of equipment, a bending limit is set for positive bends of the work rolls (7, 8) depending on the minimum thickness (W1) of the wall of the pads (9) of the work roll on facing the rolling material (3) on the sides (33) of the work roll chocks (9), and the work rolls (7, 8) are positively bent no more than the bending limit. 14. Method according to any one of claims 11 to 13, wherein the work rolls (7, 8) of at least one tooling set are bent negatively depending on the barrel shape of the work rolls (7, 8). 15. The method according to any one of claims 11-14, wherein at least one set of equipment is set to axially offset the work rolls (7, 8) relative to each other depending on the width and thickness of the rolled material (3). 16. Rolling mill (35), containing at least one rolling device (1) according to any one of claims 1 to 10.

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