FR2607032A1 - ROLLER, ESPECIALLY COLD ROLLER - Google Patents

Abstract

THE INVENTION CONCERNS A ROLLING ROLLER, IN PARTICULAR A COLD ROLLING ROLLER, PREFERRED FOR METAL MATERIALS OR METALS, PRIMARILY STEEL OR HEAVY NON-FERROUS, ADVANTAGEOUSLY FOR ROLLING, OR PRE-ROLLING OR RE-ROLLING STRIPS OR STRIPS. TOLES, WITH AT LEAST TWO, OR BETTER FOUR TO TEN, CYLINDERS ARRANGED ON TOP OF THE OTHERS. FOLLOWING THE INVENTION, THE PLAN OF SYMMETRY S, ESPECIALLY VERTICAL, OF THE CARRIING CONSTRUCTION OF THE LAMINATOR OR OF THE CAGE OR COLUMNS OF THE LAMINATOR, ESPECIALLY OF ITS MAIN STRUCTURE 19, 20, 21, 22, PROVIDED WITH AT LEAST ONE WINDOW IN THE ZONE OF THE BOMB OF THE CYLINDERS OR OF THE ROLLING INTERVAL, COINCIDES WITH THE SYMMETRY PLAN S OF THE CYLINDER SYSTEM 1 TO 10 OR OF THE ARRANGEMENT OF THE CYLINDERS, ESPECIALLY VERTICAL, EITHER FULLY OR AT LEAST ESSENTIAL, AND IS THEREFORE ROTATED OF 90 COMPARED TO THE TRADITIONAL EXECUTION.

Description

The invention relates to a 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 laminating or pre-laminating or relaminating strips or sheets

  them, with at least two, preferably four to ten, cylin-

  dres preferably arranged one above the other, with acting directly on the outer table of the convexity of the cylinder, hydraulic means, in particular at least

  one, preferably at least two elements of hydroseal bearings

  static and / or preferably hydraulic cylinders

  on bearing elements, preferably hydrostati-

  ques, and this on each bulging cylinder.

  In known methods, the rolling mill stands each have lateral rolling mill columns for services and training, intended to install the adjustment devices. bearing sets and various installations. By the position of the rolling mill columns placed parallel to the rolled products and normally or perpendicular to the axis of the rolling mill rolls,

  construction widths are required, making it

  up to now possible a short distance between the strip thickness controller and the rolling mill grip and

  thus being in the space of the regulation systems

  opening of the rolling mill intended to improve tolerances

thick rancid.

  The present invention aims to remedy this inconvenience.

  comes by making the plane of symmetry coincide, in part

  vertical base, of the structure (s) carrying lami-

  black or frame or rolling mill columns, especially

  their main load-bearing structures, comprising

  dres carriers arranged on either side of the rolling mill cylinders parallel to their axes, and provided with a window at least in the area of the convexity of the rolls or

  the opening of the rolling mill, with the plane of symmetry, in par-

  vertical particular, the cylinder system or the

  sition of the rolls, of the rolling mill roll system or of all the rolls, completely or at least essentially, while for this purpose the supporting frames provided with a window, arranged on either side and at

  proximity to the rolling mill and parallel cylinder system

  ment to their axes, are connected to each other, with the greatest flexural rigidity, above and / or below the cylinders by connections perpendicular to the

cylinder axes.

  By this arrangement of the supporting structure of the rolling mill turned by 900 compared to the previous executions, in particular by the arrangement of the rolling mill columns taking up the main forces, the width of

  construction of rolling mill stands can be considerable-

  compared to the known types of construction, there is no loss of strength or

  load carrying capacity, but on the contrary

  tit to savings in materials and weight. The advantages of the 900 rotation of the supporting frame of the cylinders

  of rolling mill, according to the invention, are particular-

  enhanced when acting directly on the curved

  rolling mill cylinders hydraulically, in particular

  link at least one and advantageously at least two elements of hydrostatic bearings and / or hydraulic cylinders

  acting on bearing elements, preferably hydros-

  and especially on each bulge of a rolling mill. In

  the case of rolling mill stands for strips of small width

  yenne, the effect indicated above becomes completely effi-

  cace because then the diameters of the corresponding support cylinders

  lay, in the case of the usual quarto cages, about

  the width of the bulge. The window width of the columns

  90o turns can be matched. In addition, this arrangement

  tion makes it possible to reduce the window height of the columns appreciably, by which the result is, with shorter column caps, a reduction in the elasticity of

the cage.

  The invention differs from the known state of the art.

  mainly by the rotation of 900 columns.

  According to patent AT-PS-339,854 for example, the plane of symmetry of the frame consisting of bearing supports and crosspieces arranged perpendicularly to the axis of the rolling mill rolls is perpendicular to the plane of

  symmetry of the rolling mill cylinder system.

  We obtain an almost very favorable realization

  maple if the supporting structure of the cylinders is made up

  by rolling mill columns forming a frame arranged laterally

  relatively to the tables or the bulges of the rolling mill cylinders, made with hot-rolled steel slabs, cut to the desired length, and cut to create a window, while at least the horizontal spans

  of these steel slabs forming frames are re-

  linked by spacers with the highest flexural rigidity. Thus the construction costs for the supporting structure of the rolling mill can be reduced by one

  significantly. This variant is also not suitable

  approached by the state of the art although the patent DE-OS5-31 32 339 only shows side constructions

  C-shaped but not as a column column frame

black.

  The constitution of the supporting structure of the cylinders

  dres of rolling mill according to the present invention allows that, on the side from which the rolled product leaves the load-bearing structure

  cylinders, immediately against or almost immediately-

  against, be arranged a bank thickness controller

  from, in the area of the laminate outlet, preferably as much as possible at a distance of 125 to 150% of the diameter of the

  larger rolling cylinders or near the opening

  Rolling ture, the strip thickness controller having for this purpose an emitter to allow the adjustment of the rolling opening height, and more especially to allow the adjustment of the hydrostatic bearing elements and / or the hydraulic cylinders. The pivoting, according to the present invention, of the rolling mill columns thus makes it possible to

  move the tape thickness controllers closer to the opener

  ture of the rolling mill, which allows faster entry of

  thickness tolerances and adjustment, faster than up to

  that now, total tolerances with respect to the straight line O. On the other hand, by reducing the module of the cage, we can count on an improvement in tolerance

  total thickness in the rolled product.

  According to the invention, the same rendering can be obtained.

  lamination with a smaller and more compact rolling stand. This makes training possible by

  smaller gables and smaller bevel gears.

  We can also be satisfied with a smaller main engine with less expenditure and investment costs for the power supply as well as for the regulation;

  the width of the rolling stand in accordance with the invention

  tion can be reduced significantly compared to the width of previous executions, for example by more than a third, which allows the arrangement explained above of the tape thickness controller near the opening

of the rolling mill.

  EP-PS-O 152 810 LBDS-O 52 810 shows a thickness controller, but this is another type

  rolling mill cylinder, i.e. rolling cylinders

  black with elastic bending adjustment, for which hydrostatic pressure elements do not act on the external tire of the cylinder but on the internal tire. On the other hand, the position of the thickness controller cannot be compared with the case of the rolling stand of this patent. This modification of arrangement differs fundamentally from that published by patent DE-OS-31 45

  526. These are indeed rolling mill cylinders with adjustable

  by elastic bending which have fixed cylinder support ends on which the jacks act

  but not the ends of cylinder bearing trunnions

  rotating dres which are placed under the action of lifting or traction cylinders. The other bending devices according to this stage of the technique in no way act on the support cylinders but on the contrary on the cylinders of

job.

  The following are examples of non-limiting examples.

  tifs, various embodiments of the present invention, with reference to the accompanying drawing in which: Figures 1 to 4 show a compact cold rolling mill cage with ten rollers, according to the invention, Figure 1 being a sectional view along line CC of Figure 3, Figure 2 a partial representation of a sectional view along line BB of Figure 1, Figure 3 a front view and Figure 4 a partial view of a section

along line AA in Figure 3.

  Figures 5 to 8 show a quarto compact cold rolling stand, according to the invention, with the views in

  corresponding cuts, as for the pre-rolling stand

  cedent. Figure 9.9a and 10, lo0a or 11 and 12 show

  Duo compact cold rolling mill stands.

  Figure 13 is a block diagram of the installation

lation.

  The rolling mill with ten rollers according to FIGS. 1 to 4 has working rolls 1 and 2, lateral support rollers 3 to 6, intermediate rolls 7 and 8

  as well as support cylinders 9 and 10. The support cylinders

  then lateral 3 to 6 are, in the usual way, in hydrostatic bearings. The large support cylinders 9 and 10 are here supported, in the region of their curved tables, 16, by four hydrostatic bearing elements 11 to 14. To obtain the hydrostatic support oil film of these bearing elements, likewise that for the working cylinders 1,2 mounted on hydrostatic bearings or for their boxes, it is advantageous to use the available cooling fluid, that is to say the rolling oil or the rolling emulsion. On the bearing elements 11,12 act the hydraulic jacks 17,18 controlled by a computer, jacks which are mounted on a spacer 19, which connects together, jointly with a second spacer 20 the steel slabs 21,22 and thus forms the main frame 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 adjusted by

  signals delivered by transmitters integrated in a control

  their flatness and in a laminar thickness controller

  born 24, which leans here against the rolling opening 23,

  or integrated in the hydraulic cylinders 17,18. The calcu-

  reader installed for the above-mentioned adjustment compares the theoretical values given to it for the thickness of the laminate strip or the flatness of the laminate desired, with the actual value of the signals communicated to it

  by the various transmitters and then controls the power

  pressure or the control components for the

various hydraulic cylinders.

  Due to the arrangement of the bearing elements

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

  lindres and that of the hydraulic cylinders 17,18, the

  lines of action are also deported from the area,

  tuelle until now, cylinder trunnions

  in the axis area 25.26 of the hydroseal bearing elements--

  static 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

  center, hydraulic cylinders controlled by the calcula-

  tor with the above-mentioned transmitters makes possible a particularly advantageous adjustment of the elastic bending lines of the cylinder set, in particular of the cylinder

support 9.

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

  vertical particular, of the supporting structure (s) of the rolling mill, forming a frame, and provided with a window at least in the region of the convexity of the rolls or the rolling opening, or the plane of symmetry of the rolling mill stand or else the plane of symmetry of the spacers, in particular of their main load-bearing 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 mill rolls.

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

  hydraulic control means, and also with the

  hydrostatic bearing elements 11.12.

  Here, in addition, act on the trunnions or on the bearings 27, 28 of the upper support cylinder 9, hydraulic push or pull cylinders 29, 30 themselves

  actuated by signals from the flatness controller

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

  trunnions or above the bearings, practically sim-

  ples journal bearings, advantageously articulated roller bearings 27,28, of the upper cylinder or cylinders,

  or higher, in particular from the upper support cylinder

  laughing 9, in the upper lateral zone of the supporting structure of the cylinders, advantageously on both sides of the upper spacer 19 in the free space between the steel slabs 21, 22 forming, in the present case ,

  the main load-bearing structure, the assembly being oscil-

  lant. Their piston rods 33, 34 are integral with the

  grooves of the upper rolling mill cylinder (s) 9 by means of traction parts 35, 36, in particular

  through a ball joint being advantageously

  ment on an upwardly directed extension 35,36 of the housing of the journal bearings 27,28, these piston rods 33,34 therefore being integral with the cylinder journals or

their housing.

  On the other hand, an already known wedge adjustment device 31 is provided. This shim device is

  arranged below the two hydrostatic bearing elements

  ticks 13,14 of the lower support cylinder 10 and it aims, among other things, to compensate for the wear of the set of lower cylinders 2,8,10 or of the lower cylinder 10. On this device with adjusting shim acts a jack hydraulic actuator or an ascent / descent cylinder 32 which can be actuated in order to adjust the elastic flexion lines of the lower cylinder or cylinders 2,8,10 by signal transmitters, in particular by computer control

  previously exposed, or by active adjustment components

  keen on 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 lifts 29.30.

  The shim adjustment device 31 is in the form of a wedge arranged substantially in the direction of the length of the rolling cylinder and the contact plane of which

  39.40 forms an angle with the horizontal. The actuating cylinder

  vre indicated above 32 is centered on this corner and arranged both below and on the side of the set of cylinders. The piston rod 41 of this jack is connected to the base 42 of the movable corner 38, in particular upper, in particular with an articulation, the other corner 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 structure of the rolling mill rolls,

  actually comprising two steel slabs 21,22 and spacers

19.20 toises connecting them.

  Figures 5 to 8 show another example of an example

  cution of the invention, namely a quarto compact cold rolling stand, FIG. 5 being a section view

  along line CC of FIG. 7, FIG. 6 a representation

  partial feeling of a section along line BB of FIG. 5, FIG. 7 a front view and FIG. 8 a view

  partial view of a section along line AA in Figure 7.

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

  refer to the description of figures 1 to 4.

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

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

  black and Figure lOa a partial view of a section along the line AA of Figure 10. This rolling mill comprises only two cylinders 49.50 whose tables are designated by

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

will lead to the first example.

  The compact duo rolling mill according to Figures 11 and 12 which are, for Figure 11, a sectional view along the line AA of Figure 12 and, for Figure 12, a front view of the rolling mill, differs from the previous examples in which, in the field of cylinder tables 51, 52, the hydrostatic bearing elements acting directly on them as well as the corresponding hydraulic jacks have been eliminated. The construction of the main frame,

  analogously to the type of execution presented previously

  ment, includes steel slabs 21,22 and spacers 19 ', 19 ", 20', 20". Here also the main load-bearing structure

  is turned 900 compared to the type of execution of the

  cold miners known until now. The chair 53 for a combined radial-axial bearing and the embedding chair

  54 for a radial bearing carry or contain all

  of the rolling mill cylinder 51. These parts are solid

  daires hydraulic cylinders 55,56, which themselves are pre-positioned via pins 57,58, so can be raised or lowered. These spindles are acted on by worm gears 59.60. Furthermore, a hydraulic cylinder 61 is also provided, acting on the chairs 53, 54 by means of a suspension 62 and a cross-member 63. The adjustment device with wedge 31

  works in a similar way to the previous examples.

  Figure 13 is a modular block diagram of the servos exposed above of the hydraulic device

  and hydraulic cylinders 17,18,29,30,32 acting in par-

  particular on hydrostatic bearing elements 11,12

  support cylinders, mainly in bom-

  open 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 real values with the set values provided by the control panel 66 and causes, by means of appropriate signals, the intervention of the various hydraulic cylinders 17, 18, 29, 30 or 32 by means of means of hydraulic or servo valve controls 67. The other parts of the rolling mill shown are indicated with

  the same references as in the previous examples.

he

Claims (4)

  1.- Rolling mill, especially cold rolling mill, main   especially for metals or metallic materials, above all steel or heavy non-ferrous metals, particularly advantageous for laminating or pre-laminating or re-laminating strips or sheets, with at least two, preferably four to ten cylinders arranged preferably one above the other, with, acting directly on the   outer cylinder domed table, hydraulic means   that, in particular at least one, preferably at least two hydrostatic bearing elements and / or preferably hydraulic cylinders acting on bearing elements,   preferably hydrostatic, and this on each cylinder of cy-   lindre, characterized in that the plane of symmetry (S), in particular vertical, of the framework (s) carrying the   rolling mill, or rolling mill stand or columns of the   minoir, in particular of their main frameworks   teuses (19 to 22), provided with a window at least in the region of the bulge of the rolling mill rolls or the opening of   rolling, consisting of two supporting frames (21,22) dis-   placed on either side of the cylinders, parallel to   their axes, coincides with the plane of symmetry (S), in part   vertical base, of the rolling mill cylinder system (1 to 10) or of all the cylinders, completely or at least essentially, while for this purpose the supporting frames (21, 22), provided with a window, arranged on both sides   and close to the rolling mill and roller system   parallel to their axes, are connected to each other, with the greatest flexural rigidity, above and / or   below the cylinders by connections (19,20) perpendicular to the axes of the cylinders.   2.- rolling mill according to claim 1 characterized   in that the supporting structure of the cylinders is   killed by rolling mill columns forming a frame which are arranged laterally with respect to the tables or bulges (15,16) of the rolling mill cylinders and which are formed by hot-rolled steel slabs (21,22), cut to length desired, and cut to create a window, while at least the upper horizontal spans of these   steel slabs forming frames are connected by spacers   ses (19,20) with the highest flexural rigidity.   3.- Rolling mill according to any one of claims 1 and 2, characterized in that, on the side o the product   laminate comes out of the supporting structure of the cylinders, immediately   A tape thickness controller (24) is disposed against or almost immediately against, in the area of the   exit from the laminate, preferably as far as possible   tance from 125 to 150% of the diameter of the largest rolling rolls or near the rolling opening (23), the   tape thickness controller having for this purpose a transmitter   to allow the adjustment of the rolling opening height, and more specifically to allow the adjustment of the hydrostatic bearing elements (11,12) and / or the jacks hydraulics (17,18).   4.- Rolling mill according to any of the claims   cations 1 to 3, with, acting directly on the outer table of the convexity of the cylinders, a hydraulic means,   in particular at least one, preferably at least two elements   hydrostatic bearing elements and / or preferably   hydraulic rins acting on elements of bearings,   preferably hydrostatic, and this on each cylinder of cy-   lindre, characterized in that, in order to regulate the elastic bending line or lines of play of the rolling mill rolls, especially of the roll or rolls placed above   of the rolling opening, preferably from the roll   then upper, the lines of action of the rolling forces, in particular the pressure and / or support forces acting on the rolls, in particular the support rolls   are displaced, particularly in their totality   tee, from the bearing area of the cylinder trunnions to   the convex area of the cylinders, in that, by means of para-   meters depending on the state of the active parts of the rolling mill under the effect of the forming of the laminated material and dependent on   the condition of the material used, the hydraulic means are adjusted   lique acting directly on the outer mantle of the bulge of the rolling mill cylinder, in that, in particular, are   signal transmitters acting on the vehicle (s)   hydraulic rins arranged above the support cylinder   upper and similarly below the lower support cylinder   laughing in the area of their bulge, and actuating the element or elements of hydrostatic bearings, each acting on a   or better on at least two bearing elements, preferably   hydrostatic sensors, which signal transmitters are integrated in a flatness controller and / or in a band thickness controller and / or in the hydraulic cylinder (s) mainly the upper cylinder (s), in which advantageously a control by computer is connected on the one hand to the signal transmitters, the computer comparing set values for the product to be laminated with the actual values which reach it from the signal transmitters or signals themselves arriving, and on the other hand to the hydraulic cylinders (17,18), or to their supply of pressurized fluid, or to the adjustment components for   these cylinders and, where appropriate, in particular indirect-   ment, to the hydrostatic bearing elements (11,12), and in that, in addition, hydraulic traction or   lifting (29,30), which are actuated by means of pro-   coming from the flatness controller to allow adjustment of the elastic bending lines of the rolling roll set, in particular the upper support roll (9), act directly on the rolling roll bearings (27,28), or on the journals of these cylinders, and at least of the upper cylinder, especially of the support cylinder upper (9).