FR2607035A1 - ROLLING MILL, ESPECIALLY COLD ROLLING MILL - Google Patents

Abstract

LAMINATOR, IN PARTICULAR A COLD ROLLER. THIS ROLLER IS CHARACTERIZED IN THAT IT INCLUDES AT LEAST TWO HYDROSTATIC BEARING ELEMENTS 11, 12 ACTING ON THE OUTER COAT OF EACH CYLINDER BOMB AS WELL AS HYDRAULIC CYLINDERS 17, 18 ARRANGED IN THE BOMB AREA OF THE LAMINATION CYLINDERS ABOVE THE UPPER PRESSURE CYLINDER AND IF NECESSARY ABOVE THE LOWER PRESSURE CYLINDER 9, A CONTROL PER COMPUTER IS CONNECTED ON THE ONE HAND TO THE SIGNAL EMITTERS, THE COMPUTER COMPARING THE SET VALUES FOR THE PRODUCT TO BE ROLLED WITH THE ACTUAL VALUES RECEIVED FROM THE EMITTERS OF SIGNALS OR ARRIVING SIGNALS, AND ON THE OTHER HAND TO HYDRAULIC CYLINDERS 17, 18, AND HYDRAULIC TRACTION OR PUSHING CYLINDERS 29, 30, ACT DIRECTLY ON THE BEARINGS OF THE ROLLING CYLINDERS 27, 28 OR ON THE JOURNALS OF THESE CYLINDERS, AND AT LEAST THE UPPER CYLINDER, ESPECIALLY THE UPPER SUPPORT CYLINDER.

Description

The invention relates to a rolling mill, in particular a cold rolling mill,

  mainly for metals or metallic materials, above all for heavy steel or nonferrous metals, particularly advantageous for rolling or pre-rolling or re-laminating webs or plates.

  with at least two, preferably four to ten,

  preferably arranged on top of one another, with, acting directly on the outer table of the cylinder crown, a hydraulic means, in particular at least one

  one, preferably at least two hydrostatic bearing elements

  and / or preferably hydraulic cylinders acting

  these bearing elements, preferably hydrostatic,

  on each cylinder crown.

  Usually, in cold rolling mills, the forces

  necessary for the rolling of sheets and strips are

  carried on the curved zone of the rolling rolls via the cylinder journals. As a result,

  produces elastic flexion lines of negative convexity

  tive. These bending lines are damaging because they lead, despite a restricted action and by the effect of convexities, to a shaping and a sharpening of the angles of

  the section of the rolled product which moves away from the

tangular desired.

  This disadvantage is, according to the invention, positively

  influenced by the fact that, for the purpose of adjusting the elastic flexion line (s) of the set of cylinders,

  less for the upper support cylinder, the lines of

  of the rolling forces and at least the forces of

  pressure or support acting on the upper support cylinder are offset, in particular in their entirety, from the zone of the bearings of the cylinder journals in the zone

  curved rolling cylinders and, by means of paragraphs

  depending on the state of the parts under the effect of

  mage of the laminated material and the state of this matter

  itself, the hydraulic means acting directly

  on the outer mantel of the crown of the upper cylinder and, possibly, the lower cylinder. For this purpose at least two hydrostatic bearing elements are provided

  acting on the outer mantle of each cylinder crown

  and hydraulic cylinders arranged in the region of the curvature of the rolling rolls above the upper support roll and, where appropriate, below the lower support roll, jacks on which signal transmitters are actuated. integrated in a flatness controller and / or in a web thickness controller and / or in the hydraulic cylinder (s), mainly the upper cylinder (s), and a computer control

  is connected on the one hand to signal transmitters, the calculation

  comparing the nominal values of the product to be rolled with the actual values received from transmitters of incoming signals or signals, and secondly to the hydraulic cylinders or their supply of pressurized fluid, or to the control components for these cylinders and, where appropriate, in particular indirectly, the hydrostatic bearing elements. In addition hydraulic jacks of traction or thrust, which are actuated by means of signals from the flatness controller to allow adjustment of the elastic flexion lines of the game

  rolling cylinders, in particular the cylinder of

  higher level act directly on the

  rolling cylinders. or on the trunnions of these cylinders

  dres, and at least the upper cylinder, especially the

upper support cylinder.

  Hydraulic cylinders are thus placed directly above and below the crown of the support rolls, controlled by computer by means of signals emitted by selected measuring stations; by these

  cylinders, for the purpose of adjusting the elastic flexion lines

  of the cylinder set, it is possible to exert the rolling forces along the axis of these cylinders, via

  the ends of the cylinder pistons and the hydrostatic bearings

  rolls of cylinders below or above

  these forces can be exercised all over the world.

  the product of the rolled product. It is advantageous to feed the hydrostatic bearings of the cylinders themselves with the oil

  rolling mill or rolling emulsion. The levels of

  rolling rolls known until now,

  with their expensive system of bearings, may be

  lants. On the other hand, if the provisions

  In the forms of the invention, the bending forces can be reduced and the diameters of the support rolls can be reduced in size. In addition, a set of cylinders

  of this type, according to the invention, can be

  height, which leads to a smaller mill column height and a more compact cage construction. By the control and transformation, according to the invention, elastic bending lines that had previously been, the shape of the rolled strip improves on

  all its width. This results in a decrease in the ef-

  on the edges of the rolled strip and reduces the risk of breakage of this strip during rolling. Intermediate interventions, such as trimming the edges of the web, also see their number decrease, allowing increased production and reduced costs. To optimize or obtain an exact parallelism of the shape of the strip, it is possible to regulate, as has already been explained, the hydrostatic bearings of rolling rolls placed below and above the curved lower or upper zones of the rolls of the roll. rolling. So,

  complementary improvements of up to four

  -lite by improving the shape of the laminate. With cages

  rolling mill construction lower in height is improved

  the module of the cage and we obtain an improvement if-

significant tolerances.

  In patent AT-339 854, it is well exposed that, by connecting the pressure elements to different pressure sources, one can act on the compressive force of the rolling rolls in the direction of their length. The present invention presents. among others, a new development of this state of the art. Indeed, an adjustment of the elastic bending line or lines, as well as the transfer of the lines of action of the rolling forces according to the invention, is not mentioned in this patent. On the other hand according to this publication, remains pending the way in which one must influence the elements of pressure and foremost. according to what. Moreover, according to this literature and as an optional additional feature extending

  the subject of the patent application, no regulation

  the defined measuring signals act directly on the roll roll journals to further influence the elastic flexion lines, if any.

rolling rolls.

  The present invention also does not relate to the state of the art if one also considers the patent

  EP-0152810, according to which only articles are considered

  concerning rolling mills using bending cylinders for support cylinders, for which it is

  It is known that hydrostatic pressure elements do not

  do not lie on the outer mantle of the support cylinders but on the inner surfaces of hollow cylinders. This is thus, in the case of this known embodiment, a type of mill construction fundamentally different from that of the invention. In the sense of the invention, it is not necessary to look for additional characteristics

  concerning rolling mill improvements of a different nature

  ferent. Moreover, in this patent, it is purely and simply

  alleged that, for the adjustment of the average in-line force on the rolled strip, a controller is

  thickness which controls a thickness adjuster which itself

  same, transmits an adjustment signal to a pressure control device. This device controls the arrival of a

  fluid under pressure to the hydrostatic pressure

  in such a way that the average in-line force reaches a set value. In addition, the thickness adjuster can also control the speed of the rolled strip, and thickness sensors and tension sensors can be provided.

  of traction, which command adjusters, who themselves

  my influence, to obtain the desired profile, on

  pressure control devices, in particular with regard to pressure, in the pressure

upper.

  In the configuration according to this anteriority, it

  this is the dimensioning of the clamping forces or the

  these in lines and this mainly in the sense of a

  constant reduction of the thickness. A setting according to the in-

  of the elastic flexion line (s) of the set of

  Rolling cylinders are not mentioned in this literature.

  ture. Similarly, it is not mentioned in this patent deportation

  lines of action of the rolling forces according to the invention

  for a setting described above according to the invention

  nor is there any mention of an adjustment referred to above.

  above or an offset with the aid of hydrostatic

  statics controlled by the computer and acting on the outer mantle of the cylinder crown and, where appropriate, on the bearing journals of the cylinders. The execution according to DE-AS-21 38 894 has even fewer points

  common with the invention: this is indeed a matter of

  bending spool disposed outside the rolling stand, the cross member being arranged against the cage in an independent manner and without possibility of height adjustment under the effect of its bending, with a bending stress roll, acting on the curved of the upper support cylinder and which is adjustable in height by means of an adjustment device placed against the bending beam. Apart from the fact that by a single bending stress roll which extends over a large part of the length of the support roll, it is not possible to achieve efficiency

  comparable to that of at least two

  according to the invention, the evocation of the adjustment of the elastic bending line (s) of the set of rolling rolls by means of the offset of the lines of action of the rolling forces and for

  this, the control by calculator serving, according to the in-

  vention, to obtain this offset and dependent on

  the measures provided, it being understood, however, that the

  The optional tick of the bending of the trunnions or of the roller bearings is not comparable, according to the invention, with the deformation of the extension of such

  trunnions. DE-OS-31 45 526 speaks of more

  flexibly adjustable, so that what has been said above about this is valid because it is a

  invention concerning an absolutely different type of rolling mill.

  rent. According to this prior art, the bearing forces of the bearing elements acting internally on the bearing cylinders are concentrated along a line S1. The route

  of a support force line S2, alternatively, with moduli

  Bending elements applied to the ends of the work rolls is presented as possible. This is an automatic adjustment of the magnitudes of the support forces, among others

  considering their size in the case of

  may be superimposed along a vertical line, in which case large forces may be concentrated. The adjustment of the elastic bending lines of the set of rolls by shifting the lines of action of the rolling forces within the meaning of the present invention is not mentioned in this literature, in particular not a control command by means of

defined measuring stations.

  A particularly favorable execution of the invention

  is obtained by making the plane of symmetry, in particular vertical, of the one or more of the rolling mill carriers or the frame or the columns of the rolling mill coincide with

  particular their main supporting structures,

  both carrier frames arranged on either side of the rolling rolls parallel to their axes, and provided

  with at least one window in the area of the cylinder crown

  the rolling mill, with the plan of symmetry

  sorting, in particular vertical, the roll system or the arrangement of the rolls, the rolling roll system or the set of rolls, completely or at least essentially, while for this purpose the support frames provided with a window , arranged on both sides

  and close to the system of rolling and parallel rolls

  parallel to their axes, are connected to each other, with

  the greatest flexural rigidity, above and / or

  below the cylinders by links perpendicular to the axes of the cylinders. The bearing structure of the rolls may also consist of frame-forming mill columns arranged laterally with respect to the tables or the curvatures of the rolling rolls, made with slabs of steel cut to form a window, while less the upper horizontal bays of these steel slabs forming frames are connected by spacers with

  the greatest bending stiffness.

  In this context, it can be particularly advantageous that, on the side where the rolled product leaves the bearing structure of the rolls, immediately against or almost immediately against, is arranged a strip thickness controller, in the area of the laminate outlet. preferably as far as possible at a distance of 125 to 150%

  diameter of the largest rolling rolls or close to

  of the rolling aperture, the tape thickness controller having for this purpose an emitter to allow adjustment of the rolling pressure, and more especially

  to allow adjustment of the hydrostatic bearing elements

  ticks and / or hydraulic cylinders.

  According to the variants of the invention set out below

  above, a particular combination effect in the sense of a particularly advantageous configuration of the rolling stand can be obtained. In particular one can improve the measurement accuracy and, what is above all very important here, the possibilities of adjustment and this in a remarkable way. Additional features

  according to these variants of the invention, in particular the

  tape thickness testers

  against the opening of rolling and the possibility of

  advantageous formation of the roll stand, allow,

  in a particular way, to carry out, according to the

  vention, precise adjustment of elastic flexion lines

  of the set of rolling rolls. With regard to the

  According to US Pat. No. 3,517,531, moreover, it

  that in this embodiment the pivoting of 900, the carrier frames disposed on either side of the axis of the rolling cylinders and parallel thereto and the clearly defined above approximation of the device of

  tape thickness control against the opening of lamina-

  ge. Another particularly effective improvement of the one or more variants for adjusting the elastic bending line (s) of the set of rolling rolls can be obtained in that a corner adjusting device is provided with a parallel displaceable contact surface. to the axis of the rolling rolls, below the elements of

  hydrostatic bearings, preferably at least two,

  on the one or more bulges of the lower cylinder or cylinders, this also having the ancillary purpose of making up for the wear of the set of lower rollers or of the lower roll, a wedge device on which a hydraulic jack having

  its axis arranged parallel to the axis of the cylinders of the-

  the actuator or its adjustment components or the feed-

  tion of fluid under pressure which can be actuated, for the purpose of adjusting the elastic bending lines of the lower cylinder or cylinders, by signal emitters, in

  particularly indirectly, preferably through a

  by calculator, this calculator comparing the values

  instructions for the laminated material.

  with the actual values of the signal transmitters or

  signals reaching it, the signal transmitters being inte-

  in the bearing elements indicated above and / or in the flatness controller. On the other hand

  can be associated with an adjustment of the hydraulic jacks

  or thrust acting directly on the bearings of cylinders or on the journals of support cylinders. It is thus possible to obtain a particularly efficient adjustment of the

  elastic bending lines of the roll set.

  According to US Pat. No. 3,517,531, the wedge device is placed perpendicular to the axis of the rolling rolls so that there is only a much less space available than in the case of the invention. The installation is particularly economical if the oil or

  the rolling emulsion available as cooling means

  for the establishment of the hydrostatic oil film of the bearing elements for the upper or lower rolls, in particular for the support rolls and / or, where appropriate, for the working rolls on

hydrostatic bearings.

  As a nonlimiting example, various embodiments of the present invention will be described hereinafter with reference to the accompanying drawing in which: FIGS. 1 to 4 show a ten-roll compact cold rolling mill stand according to the invention, FIG. 1 being a sectional view along the line CC of FIG. 3, FIG. 2 a partial representation of a sectional view along line BB of FIG. 1, FIG. face and Figure 4 a partial view of a section

along the line AA of Figure 3.

  FIGS. 5 to 8 show a quarto compact cold rolling mill stand, according to the invention, with the views in FIG.

  corresponding cut, as for the rolling mill stand

  cedente. Figure 9,9a and 10, 10a show cages of

Duo compact cold rolling mill.

  Figure 11 is a schematic diagram of the installation

lation.

  The 10-cylinder rolling mill represented on the

  gures 1 to 4 shows working cylinders of small dia-

  1 and 2, lateral bearing rolls 3 to 6, intermediate rolls 7 and 8 and bearing rolls 9 and 10. The lateral bearing rolls 3 to 6 are

  mounted, in the usual way, in hydrostatic bearings

  ticks. The large support cylinders 9 and 10 are here supported

  naked, in the area of their curved tables 15,16, by four

  hydrostatic bearing elements 11 to 14. To obtain the hydrostatic support oil film of these bearing elements, as well as for working cylinders 1,2

  mounted on hydrostatic bearings or for their

  it is advantageous to use the cooling fluid

  available, ie rolling oil or rolling emulsion. On the bearing elements 11, 12 act hydraulic jacks 17, 18 controlled by a computer, jacks which are mounted on a spacer 19, which connects together with a second spacer 20, steel slabs 21, 22 and thus forms the main framework of the rolling mill. The hydraulic cylinders 17, 18 which are advantageously controlled by the computer, as well as the bearing elements 11, 12, are actuated by signals delivered by transmitters which are integrated in a flatness controller and in a controller 24 of the thickness. laminated located near the opening of

  rolling 23, or which are integrated in the hydraulic cylinders

  17,18. The computer installed for the adjustment

  above compares the theoretical values given to it for the thickness of the rolled strip or the desired flatness of the laminate, with the actual value of the signals communicated to it by the various emitters, and then controls the pressure supply. or the components of

  adjustment for the various hydraulic cylinders.

  Due to the arrangement of the bearing elements

  hydrostatic 11,12 acting on the convex tables of the cy-

  linders and hydraulic cylinders 17,18, the

  lines of action are also deported from the area,

  until now, journal pins 15

  in the area of axes 25,26 of the hydrostatic bearing elements

  11,12 that is to say hydraulic cylinders 17,18 or merged with these axes 25,26. This situation, as well as the existing link described above, and in particular

  median, hydraulic cylinders controlled by the calculation

  With the above-mentioned emitters, it is possible to provide a particularly advantageous adjustment of the elastic bending lines of the cylinder set, in particular of the cylinder.

9.

  It is visible that the plane of symmetry S, in par-

  vertical, of the frame or frames carrying the mill, forming a frame, and provided with a window at least in the region of the curvature of the rolls or the rolling aperture, or the plane of symmetry of the roll stand or the plane of symmetry of the spacers, in particular of their main carrier construction 19 to 22, coincides, totally or at least essentially, with the plane of symmetry S, in particular vertical, of the cylinder system

  1 to 10 or the set of rolling rolls.

  The computer control described above is connected on the one hand with the emitters and on the other hand with the hydraulic cylinders 17, 18, possibly with their

  means of hydraulic control, and also with the

  hydrostatic bearings 11,12.

  Here, in addition, on the journals or on the bearings 27, 28 of the upper support cylinder 9, hydraulic thrust or traction cylinders 29, 30 themselves are

  actuated by signals from the planet controller

  for adjusting the elastic flexion lines of the cylinder set, in particular the upper support cylinder 9. These hydraulic cylinders 29,30 are arranged above the

  trunnions or above the bearings, practically

  trunnion bearings, preferably articulated roller bearings 27,28, of the at least one upper cylinder,

  or the highest, in particular the upper support cylinder

  9, in the upper lateral zone of the bearing frame of the cylinders, advantageously on both sides of the upper spacer 19 in the free space between the steel slabs 21,22 forming, in this case ,

  the main supporting structure, the assembly being oscil-

  lant. Their piston rods 33,34 are in solidarity with the

  the upper rolling cylinder (s) 9 via pulling pieces 35, 36, in particular

  through a ball joint advantageously

  on an upwardly extending extension, 35,36, of the trunnion bearing housing 27,28, these piston rods 33,34 thus being integral with the cylinder or trunnion journals.

their housings.

  Furthermore there is provided a wedge adjusting device 31 already known. This shim setting device is

  disposed below the two hydrostatic bearing elements

  13,14 of the lower support cylinder 10 and

  among other things, to compensate for the wear of the cylinder set

  2 or lower cylinder 10. In this adjusting shim device, a hydraulic actuating jack or a raising-lowering jack 32 which can be actuated for adjustment of the elastic bending lines of the or lower cylinders 2,8,10, by signal emitters, in particular by computer control

  previously described, or by adjusting components

  by him. These are arranged in the control

  their flatness mentioned above. We can also

  combine with this device an adjustment of the hydraulic cylinders

lifting lugs 29,30.

  The adjustment device by shim 31 is presented

  as a wedge arranged substantially in the direction of the

  the rolling cylinder and whose contact plane

  39,40 forms an angle with the horizontal. The actuating cylinder

  As shown above 32 is centered on this corner and disposed both below and to the side of the cylinder set. The piston rod 41 of this jack is connected to the base 42 of the movable wedge 38, in particular upper, in particular with one articulation, the other wedge 37 being fixed, without the possibility of sliding, on the lower spacer 20, directly or indirectly, on the part located on the foundation side of the supporting frame of the rolls of rolling mill,

  comprising two steel slabs 21,22 and

19.20 fountains connecting them.

  Figures 5 to 8 show another example of

  according to the invention, namely a quarto compact cold rolling mill stand, Fig. 5 being a sectional view made of

  along line CC of Figure 7, Figure 6 shows a

  partial view of a section along the line BB of Figure 5, Figure 7 a front view and Figure 8 a view

  partial section along the line AA of Figure 7.

  The four rolls of the rolling mill bear the reference numerals 43 to 46, the curved tables of the lower and upper bearing rolls 45 and 46 bear the numbers 47 and 48. The other parts of this mill are designed in the same way as in example corresponding to Figures 1 to 4. The operation is also identical. We can

  refer to the description of FIGS. 1 to 4.

260? 035S

  The same is true for FIGS. 9, 9a and 10a, 10a which show a duo compact cold rolling mill stand corresponding to the invention. FIG. 9 is again a sectional view along line CC of FIG. 10, FIG. 9a a partial representation of a section along line

  BB of Figure 9, Figure 10 a front view of this lami-

  FIG. 10A is a partial view of a section along the line AA of FIG. 10. This rolling mill comprises only two cylinders 49, 50, the tables of which are designated by FIG.

  51.52. For the description of the other parts, we refer to

will take to the first example. FIG. 11 is a block diagram of the servocontrols

  exposed above the hydraulic device

  and hydraulic cylinders 17,18,29,30,32 acting in particular

  especially on the hydrostatic bearing elements 11,12

  supporting cylinders, mainly in

  thrown cylinders. The computer 64 receives, from signal transmitters, the actual values measured in the thickness controller 24 and / or in the flatness controller 65 and / or in the hydraulic cylinder 17, 18. The computer compares these actual values with the set values provided by the control panel 66 and causes, with the appropriate signal means, the intervention of the various hydraulic cylinders 17, 18, 29, 30 or 32 via means of hydraulic control or servo-valves 67. The other parts of the rolling mill are indicated

  with the same references as in the previous examples.

Claims (6)

  1. Rolling mill, in particular a cold rolling mill, mainly for metals or metallic materials, above all for steel or heavy non-ferrous metals, particularly advantageous for rolling or pre-rolling or re-laminating strips or sheets , with at least two, preferably four to ten, cylinders preferably arranged one above the other, with, acting directly on   the outer table of the cylinder crown, a hydrau-   in particular at least one, preferably at least two hydrostatic bearing elements and / or preferably   hydraulic cylinders acting on these elements of pa-   1, preferably hydrostatic, on each cylinder crown, characterized in that, for the purpose of adjusting the elastic bending line (s) of the set of rolls, at least for the upper support roll, the   lines of action of the rolling forces and at least the   these pressure or support acting on the upper support cylinder are deported, in particular in their entirety, from the region of the bearings of the cylinder journals in the area of the curvature of the rolling mill rolls and, by means of the parameters dependent on the state of the parts under the effect of the forming of the laminated material and the state of this material   itself, the hydraulic means acting directly   on the outer mantle of the crown of the upper cylinder and possibly the lower cylinder, in that   two or more hydrostatic bearing elements are provided.   statics (11,12) acting on the outer mantle of each cylinder crown as well as hydraulic cylinders (17,18) disposed in the region of the curvature of the rolling rolls above the upper support roll and, where appropriate, above the lower support cylinder (9), cylinders on which the signal emitters, which are integrated in a flatness controller and / or in a web thickness controller and / or in the hydraulic cylinder or cylinders, are operated. the upper cylinders (17,18), in that a computer control is connected   on the one hand to the signal transmitters, the calculator   setting values for the rolling stock with the actual values received from the signal transmitters or incoming signals, and on the other hand with the hydraulic cylinders (17, 18), or h their supply of pressurized fluid, or to the adjusting components for these cylinders and, where appropriate, in particular indirectly, to the hydrostatic bearing elements (11, 12), and in addition that hydraulic traction or thrust cylinders (29, 30),   which are operated by means of signals from the controller   their flatness to allow adjustment of the lines of   elastic bending of the rolling roll set, in par-   of the upper support cylinder (9), act direc-   on the bearings of the rolling rolls (27,28),   or on the trunnions of these cylinders, and at least the   upper liner, especially the upper support cylinder laughing.   2. Rolling mill according to claim 1 characterized   in that the plane of symmetry (S), in particular vertical   cal, of the bearing frame (s) of the rolling mill, or of the rolling mill stand or rolling mill columns, in particular of their main supporting frameworks (19 to 22), provided   with at least one window in the area of the cylinder crown   rolling mills or rolling aperture, consisting of two supporting frames (21,22) arranged on either side of the cylinders, parallel to their axes, coincides with the plane of symmetry (S), in particular vertical, of the system   rolling cylinders (1 to 10) or of all cylinders   completely, or at least substantially, while   for this purpose the carrying cadres (21,22), provided with a   be placed on both sides and in the vicinity of the rolling roll system and parallel to their axes, are connected to each other with greater flexural rigidity, above and / or below cylinders by   connections (19,20) perpendicular to the axes of the cylinders ders. 26UU035   3. Rolling mill according to claim 2 characterized   in that the supporting structure of the cylinders is   killed by frame-forming mill columns which are arranged laterally with respect to the roll-sheet tables or bulges (15, 16) and which are formed by hot-rolled steel slabs (21, 22) cut at the length, and cut to create a window, while at least the upper horizontal spans of these   Steel slabs forming frames are connected by struts   its (19,20) with the greatest flexural rigidity.   4. Rolling mill according to any one of the claims   2 or 3, characterized in that, on the side where the product   laminate comes out of the bearing structure of the cylinders, immediately   against or almost immediately against, is arranged a tape thickness controller (24), in the area of the   out of the laminate, preferably as much as possible   from 125 to 150% of the diameter of the largest rolling rolls or close to the rolling aperture (23), the   band thickness controller having for this purpose a transmitter   to allow adjustment of the pressure or   opening roller, and more specifically to allow adjustment of the hydrostatic bearing elements   (11,12) and / or the hydraulic cylinders (17,18).   5. Rolling mill according to any one of the   1 to 4 characterized in that an adjusting device   wedge (31) is provided with a contact surface that is displaced   çable parallel to the axis of the rolling rolls, below the hydrostatic bearing elements (13,14), preferably at least two, acting on the bulge (s) of the lower cylinder (s), this also having the secondary purpose of making up the wear of the set of lower cylinders (2,5,6,8,10) or the lower cylinder (10), a wedge device on which a hydraulic cylinder (32) acts, having its axis arranged parallel to the axis rolling cylinders, the actuating cylinder or its actuating components or the pressurizable fluid supply, for the purpose of adjusting the elastic flexion lines of the cylinder or cylinders   (2,5,6,8,10), by one or more issuers of   in particular indirectly, preferably through a computer control, this computer comparing the set values which have been given to it for the material to be rolled with the actual values of the signal transmitters or signals reaching it, the signal emitters being integrated in the aforementioned bearing elements (13, 14) and / or   arranged in the flatness controller, and can be associated with   a setting of hydraulic traction or thrust cylinders (29,30) acting directly on the bearings of   cylinders (27,28) or on the cylinder journals pui.   6. Rolling mill according to any one of the   cations 1 to 5 characterized in that the oil or   the rolling emulsion available as cooling means   for setting the hydrostatic oil film of the bearing elements for the upper or lower rolls, in particular for the support rolls and / or, where appropriate for the small-diameter rolls mounted on hydrostatic bearings.