EP0121811B1 - Multi-roll housing - Google Patents

Description

The invention relates to a multi-roll stand with two back-up rolls and two work rolls mounted in each case by means of chocks in windows of the roll stand, in which the work rolls are carried by the driven back-up rolls by friction drive and are shifted to their horizontal support from the vertical axis plane of the back-up rolls, with in the roll gap between the bales of the two work rolls, the rolling strip underlying the rolling process is arranged - four-roll stand -.

In addition, the invention also relates to a multi-roll stand with two backup rolls, two intermediate rolls and two work rolls, each mounted by means of chocks in the windows of the roll stand, in which the work rolls are driven by friction from the intermediate rolls, which are either driven directly or by the driven support rolls Friction drive are taken along and are shifted to their horizontal support from the vertical axis plane of the backup rolls and the intermediate rolls, the rolling strip underlying the rolling process being arranged in the roll gap between the bales of the two work rolls - six-roll stand -.

Such multi-roll stands are mainly used in the cold forming of strip material because they advantageously allow the use of work rolls with a small bale diameter.

In practice, it has turned out to be disadvantageous in the case of multi-roll stands of the type specified that additional rolls in the form of intermediate rolls and lateral support rolls, which extend over the entire bale length, must be used to support the work rolls having the small bale diameter. This type of construction allows extremely quiet, vibration-stable operation of the multi-roll stands. However, in addition to the wear to which these additional intermediate rollers and backup rollers are subject, there is also the considerable risk that malfunctions and / or damage may occur in the event of belt breaks.

Another major disadvantage of known multi-roll stands, such as those disclosed in DE-B-17 77 054 and DE-B-25 22 213 and DE-A-3212 070, is that on that side of the stand on which there are the support bridges for the support rollers, the roller lubrication and / or cooling is very inadequate because there is no free supply for the lubricant or cooling medium due to the support provided over the entire length of the bale.

If lateral support is dispensed with, the horizontal forces exerted on the work rolls by the friction drive during the rolling process must be compensated for only by a certain, suitable lateral offset of the work rolls.

There are, however, other significant disadvantages if, for the purpose of maintaining the necessary balance, the lateral offset of rapidly changing operating states of the multi-roll stand would be tracked. For example, when the roll gap is closed, the rolling force initially occurs alone, while the torque on the back-up or intermediate rolls and thus the peripheral force on the work rolls can only arise when the movement occurs, i.e. when starting up, but which does not occur when the machine is stopped.

However, these conditions of equilibrium cannot be met when strip breaks occur, so that in these cases malfunctions of such roll stands and also damage to the rolls cannot be avoided.

The invention aims on the one hand to eliminate the disadvantages peculiar to the known multi-roll stands of the type specified at the outset. On the other hand, it should also overcome the disadvantages of roll stands that are only compensated by lateral force and without lateral support. The object on which the invention is based is therefore to create a multi-roll stand of the generic type for the use of slim work rolls, which counteracts the occurrence of malfunctions and roll damage with minimal technical effort, even if belt breaks occur.

According to the characterizing part of claim 1, this object is achieved in a four-roll mill stand in that the bales of the work rolls with their wide end sections protrude beyond the longitudinal edges of the rolled strip and the bale ends of the backup rolls, so that these end sections of the bale of the work rolls are at least on that side , according to which the axis plane of the work rolls is offset with respect to the axis plane of the support rolls, support rolls or rolls or also hydrostatic support saddles are assigned, and that each support roll or roll or also each support saddle is essentially horizontal and parallel to the rolling direction outside the Rolling width can be adjusted against the end sections of the bales of the work rolls.

In a six-roll mill stand, however, the object is achieved in that the bales of the work rolls with their two end sections protrude beyond the longitudinal edges of the rolled strip and at least also over the bale ends of the support rolls, that these end sections of the bale Work rolls at least on the side towards which the axis plane of the work rolls is opposite the axis plane of the backup rolls and the intermediate rolls is arranged offset, support rollers or rollers or hydrostatic support saddles are assigned, and that each support roller or roller or also each support saddle can be adjusted essentially horizontally and parallel to the rolling direction outside the rolling band width against the end sections of the bales of the work rolls.

From US-A-19 05 129 a roll stand is already known, in which the two work rolls in the direction of their vertical axis plane each have with their bale ends a support system of a role interacting with the adjusting devices. However, it is not important here to support the work rolls at least over their length corresponding to the maximum rolling stock width.

In the known roll stand, the rollers are also not suitable for driving the work rolls. Rather, the work rolls are driven directly here. From this it can be deduced that in the known roll stand the work rolls must have a certain minimum diameter in order to be able to absorb the driving force safely over the entire length.

In addition, in the known roll stand, the work rolls are arranged in a common vertical axis plane with the support rollers, which in turn is an obstacle to the use of very slim work rolls.

In the known roll stand, the work rolls are also not stored in the windows of the roll stands by means of chocks. Rather, the support rollers arranged in the common axial plane with these support rollers interact with additional rollers, which only act on the roller journals which are turned away from the drive side thereof with a horizontal direction of action. With their help, however, the work rolls cannot be bent horizontally.

A multi-roll stand according to the invention has the advantage that malfunctions or roll damage cannot occur either in the case of belt breakers, or in the event of operating errors, start-up errors or incorrect connection of belt pulls.

A further training feature exists after. Characteristic of claim 3 still in that each. Support roller or roller or each support saddle can be displaced essentially horizontally both transversely to the rolling direction along the bale of the work rolls and can be adjusted parallel to the rolling direction against them.

These measures ensure that the work rolls are optimally supported with different rolling strip widths and at the same time can be subjected to a defined, horizontal bend.

An essential development feature of the invention is also seen in claim 4 in that each work roll, at least on the side towards which the axis plane of the work rolls is offset with respect to the axis plane of the backup rolls or also the intermediate rolls, two support rolls or rolls or support saddles are also assigned, and that the side distance between these support rollers can be adjusted over a range that extends at least from the maximum rolling strip width to the minimum rolling strip width. In this way, the work rolls are supported on their circumference of the bale in the vicinity of the strip edges of the rolled strip, preferably where there is no contact between the bales of the work rolls and the rolled strip.

So that, for example in the case of coarse roll passes, reliable side support of the work rolls is obtained, the possibility according to the invention is provided according to claim 5 that the support rolls or rolls or support saddles can be displaced transversely to the rolling direction along the bale of the work roll up to the roll contact area thereof to the roll belt .

In any case, the construction of a multi-roll stand according to the invention has the advantage that the work rolls can be easily lubricated and cooled from both sides.

The invention also provides according to claim 6 that the support rollers or rollers or support saddles are adjustable by means of guide crossbars parallel to the rolling direction against the bales of the work rolls and / or are displaceable along the same transverse to the rolling direction. Here, each guide crossmember can carry the two support rollers or rollers or support saddles assigned to a work roll.

The features of claim 8 amount to the fact that both support rollers or rollers or support saddles can be adjusted together via their guide crossbar parallel to the rolling direction against the bale of the associated work roll, and also jointly, but can be displaced in opposite directions along the bale of the work roll in question transversely to the rolling direction .

Finally, a multi-roll stand according to the invention is also characterized in that the adjusting drive for the guide cross members is formed by hydraulic cylinders, while mechanical drives with threaded spindles and adjusting nuts are provided on the guide cross members for longitudinal adjustment of the support rollers or rolls or support saddles.

It should also be mentioned that the structure of a multi-roll stand according to the invention can not only be used for normal four-roll and six-roll roll stands, but can also be used when such multi-roll stands are equipped with so-called bottle rolls. They can not only be used as single-use and reversing scaffolding, but can also be used in tandem streets.

The multi-roll stands according to the invention can also be used when working with positive and negative vertical work roll bending. When used as a six-roll stand, the back-up rolls do not have to be driven, but the intermediate rolls can also receive this drive, whereby then not only the work rolls but also the backup rolls are taken along by these intermediate rolls by friction drive.

Finally, multi-roll stands according to the invention can also be used with work rolls, back-up rolls and, if appropriate, which can be moved transversely to the rolling direction. also equip intermediate rollers.

Most of the advantages can be achieved if multi-roll stands according to the invention are used in continuously operating rolling plants; because there are no difficulties with the gripping conditions on the rolled strip or the threading and unthreading processes for the rolled strip.

• Figur 1 in Seitenansicht einen Ausschnitt aus einem mit einem Stützwalzenpaar und einem Arbeitswalzenpaar arbeitenden Mehrwalzengerüst,
• Figur 2 eine der Figur 1 entsprechende Darstellung eines Mehrwalzengerüstes, welches jedoch außer dem Arbeitswalzenpaar und dem Stützwalzenpaar noch ein Zwischenwalzenpaar aufweist,
• Figur 3 in der Draufsicht und teilweise im Schnitt entlang der Linie 111-111 in den Figuren 1 und 2 den erfindungswesentlichen Bereich eines Mehrwalzengerüstes,
• Figur 4 in schematischer Seitenansicht die Walzenanordnung eines Mehrwalzengerüstes einer gegenüber Figur 1 abgewandelten Bauart,
• Figur 5 in schematischer Draufsichtdarstellung das Mehrwalzengerüst nach Figur 4,
• Figur 6 in größerem Maßstab und etwas ausführlicherer Darstellung den in Figur 4 mit VI gekennzeichneten Ausschnittbereich des Mehrwalzengerüstes und
• Figur 7 in größerem Maßstab und ausführlicherer Darstellung den in Figur 5 mit VII gekennzeichneten Ausschnittbereich des Mehrwalzengerüstes.

The subject matter of the invention is explained in detail below using exemplary embodiments shown in the drawing. Show here.

• FIG. 1 shows a side view of a section of a multi-roll stand working with a pair of backup rolls and a pair of work rolls,
• FIG. 2 shows a representation of a multi-roll stand corresponding to FIG. 1, but which, in addition to the pair of work rolls and the pair of backup rolls, also has a pair of intermediate rolls,
• 3 shows a top view and partly in section along the line 111-111 in FIGS. 1 and 2, the area of a multi-roll stand essential to the invention,
• FIG. 4 shows a schematic side view of the roller arrangement of a multi-roll stand of a type modified compared to FIG. 1,
• FIG. 5 shows a schematic top view of the multi-roll stand according to FIG. 4,
• Figure 6 on a larger scale and somewhat more detailed representation of the section of the multi-roll stand marked VI in Figure 4 and
• Figure 7 on a larger scale and in more detail, the section of the multi-roll stand marked VII in Figure 5.

The multi-roll stand according to FIG. 1 has - for the sake of simplicity only partially shown roll stand 1, in the windows 2 of which - in the usual way - not shown - chocks are guided, in each of which an upper support roll 3 'and a lower support roll 3 "of a support roll set on one common vertical axis plane 4-4. Both support rollers 3 'and 3 "of the support roller set 3 are driven in rotation and each take with them by friction drive work rollers 5' and 5" of a work roller set 5, which are likewise arranged on a common, vertical axis plane 6-6 are.

The axis plane 6-6 of the work roll set 5 consisting of the two work rolls 5 'and 5 "is offset in the rolling direction with respect to the axis plane 4-4 of the two support rolls 3', 3" of the support roll set 3, with each work roll 5 'and 5 " in two chocks 7 ', 7 ", as can be seen from FIGS. 1 and 2. The bale diameters of the two work rolls 5 'and 5 "are significantly smaller than the bale diameters of the two support rolls 3' and 3". However, the bales of the two work rolls 5 'and 5 "have a greater length than the bales of the two support rolls 3' and 3".

While the bale length of the two support rollers 3 'and 3 "needs to be dimensioned only slightly larger than the maximum roll width, the bale length of the two work rolls 5' and 5" is dimensioned such that it projects beyond the maximum roll width on both sides.

The roll bales of the two work rolls 5 'and 5 "of the work roll set 5 are each assigned special support rollers 8' or 8" in the area of the two bale sections protruding beyond the maximum roll width, at least on that side, according to which the axis plane 6-6 of the work roll pair 5 are offset from the axis plane 4-4 of the support roller pair 3.

On the circumferential side opposite the support rollers 8 'and 8 ", the bale sections of the two work rollers 5' and 5" projecting beyond the maximum rolling band width can also be assigned "support rollers 9 'and 9".

The direction of passage of the rolled strip through the multi-roll stand is indicated by the arrows 10 in FIG. 1. This shows that the axis plane 6-6 of the two work rolls 5 ', 5 "of the work roll set is offset from the axis plane 4-4 of the two support rolls 3', 3" of the support roll set 3 to the outlet side and that the support rolls 8 'and 8 "interact on the outlet side of the multi-roll stand with the bale ends of the work roll 5 ', 5", while the support rollers 9', 9 "are assigned to the bale ends of the two work rolls 5 'and 5" on the entry side.

In Fig. 1 and 3 of the drawing it can be seen that the support rollers 8 'and 8 "and / or 9', 9" relative to the work rolls 5 'and 5 "have such an arrangement that they are not actively involved in the rolling process , but act on those bale sections of the work rolls 5 'and 5 "in which no rolling work takes place.

Whether the support rollers 8 ', 8 "or 9', 9" are only brought into action on the outlet side, only on the inlet side or both the inlet side and the outlet side in such a way that they act on the relevant bale end sections of the work rolls 5 'and 5 "in such a way that they run continuously depends essentially on the bale diameter of these work rolls 5 'and 5 "and / or also on the multi-roll stand being operated as a one-way stand or as a reversing stand.

Because of the support rollers 8 ', 8 "and 9', 9" acting laterally outside the maximum width of the roller on the bale circumference of the work rolls 5 'and 5 ", a definite fixation of the position of the work rolls 5' and 5" also becomes the case Back-up rollers 3 'and 3 "are also ensured if tape breakers occur or operating and start-up errors occur as well as incorrect connection of tape pulls gene takes place. In all these cases, the special assignment of the support rollers 8 ', 8 "or 9', 9" to the work rolls 5 'and 5 "prevents operational malfunctions from occurring on the multi-roll stand or damage to the work rolls 5', 5" .

The support rollers 8 ', 8 "or 9', 9" acting on the bale sections of the work rolls 5 'and 5 "lying outside the maximum roll band width can not only avoid malfunctions of the multi-roll stand and damage to the work rolls 5', 5", but they can also be used to force the work rolls 5 'and 5 "in the area between the chocks 7' and 7" supporting them to have a substantially horizontal bending deformation over the length of the roll bales. In order that the bending of the work rolls 5 'and 5 "in the longitudinal direction of their roll balls is made possible via the support rolls 8', 8" or 9 ', 9 ", each individual support roll 8', 8" or 9 is shown in FIGS ', 9 "assigned a horizontal adjusting device 11, which can be acted upon by hydraulic cylinders with the necessary bending forces, for example.

2 basically has the same structure and the same mode of operation as the multi-roll stand according to FIG. 1. The only difference is that the multi-roll stand according to FIG. 2 each between the support roll 3 'or 3 "and the associated work roll 5 'or 5 "still has an intermediate roll 12' or 12". The two intermediate rolls 12 'and 12 "are preferably arranged on the same vertical axis plane 4-4 as the two support rolls 3' and 3", while the work rolls 5 'and 5 "lie on the vertical axis plane 6-6, which is offset towards the outlet side of the stand.

1 in the case of the multi-roll stand according to FIG. 1, the work rolls 5 'and 5 "are taken along by frictional drive from the rotationally driven support rolls 3' and 3", it is also possible with the multi-roll stand according to FIG. 2, instead of the support rolls 3 'and 3 " To drive intermediate rollers 12 'and 12 ", such that they take the work rolls 5' and 5" on the one hand and the support rollers 3 'and 3 "on the other hand each by friction drive.

With regard to the arrangement and design of the functional elements shown in FIG. 3, the multi-roll stand according to FIG. 2 completely corresponds to that according to FIG. 1.

1 to 3, the side distance 13 between the two support rollers 8 ', 8 "or 9' or 9" assigned to the same work roll 5 'or 5 "is fixed, and corresponds approximately to the maximum roll width 4 to 7 show an embodiment of a multi-roll stand, the basic structure of which corresponds to the multi-roll stand according to FIG. 1.

The multi-roll stand according to FIGS. 4 to 7 is thus - like the multi-roll stand according to FIG. 1 - designed as a four-roll stand, i. H. it has two driven support rollers 3 'and 3 "as well as two work rollers 5' and 5" carried along by friction drive. The two backup rolls 3 'and 3 "are in turn on a common vertical axis plane 4-4, while the work rolls 5' and 5" have a common vertical axis plane 6-6, which is offset from the axis plane 4-4 towards the outlet side of the multi-roll stand , as can be seen from the arrow 10, which indicates the direction of the rolling stock. On the outlet side of the multi-roll stand according to FIGS. 4 to 7, the work roll 5 'is assigned two support rollers 8' and the work roll 5 "two support rolls 8", as is indicated in FIGS. 4 and 5. On the inlet side, the work roll 5 'can also be assigned two support rollers 9' and the work roll 5 "two support rolls 9", as can also be seen in FIGS. 4 and 5 by dashed lines.

In FIG. 5 it can clearly be seen from the work roll 5 "that the work rolls 5 'and 5" have a much larger bale length than the associated support rolls 3', 3 ", of which only the support roll 3" in FIG. 5 is through dash-dotted lines - is indicated.

The bale length of the two support rolls 3 'and 3 "is matched to the maximum roll width, i.e. it is preferably dimensioned somewhat larger than the maximum roll width. In contrast, the bale length of the work rolls 5' and 5" is designed to be considerably larger than the maximum roll width.

It is important in the multi-roll stand according to FIGS. 4 to 7 that the lateral distance between the support rollers 8 'or 8 "and 9" and 9' or 9 "assigned to the same work roll 5 'or 5" is between a maximum dimension 13' and a minimum dimension 13 "can be changed continuously. The maximum dimension 13 'of this lateral distance corresponds at least to the maximum strip width, while the minimum dimension 13 "of this lateral distance is approximately equal to the minimum rolling band width, but may also be somewhat smaller than the minimum rolling band width.

Since the side distance can be varied within the limits given by the maximum dimension 13 'and the minimum dimension 13 ", it is possible to always support the support rollers 8', 8" or 9 'or 9 "relative to the work rolls 5', 5" so that they support the bale sections of the work rolls 5 'and 5 "protruding beyond the respective rolling band width on the outlet side and / or also on the inlet side. In the event of belt breakers, operating and start-up errors or even incorrect connection of belt tensioners, thereby preventing malfunctions of the multi-roll stand and / or damage to the work rolls 5 'and 5 "even better than with multi-roll stands of the type illustrated and described with reference to FIGS. 1 to 3.

The horizontal bending of the work rolls 5 'and 5 "can be done by the in their Seitenab stand variable support rollers 8 ', 8 "or 9' or 9" influence better than when there is a fixed lateral distance between them.

5 in the area of the chocks 7 "indicates that vertical work roll bending devices can also be installed in the multi-roll stand, so that it is possible to impart a spatial curvature to the work rolls 5 'and 5" , namely by working simultaneously with the horizontal bending devices 11 acting on the support rollers 8 ', 8 "or 9', 9" and the vertical bending devices 14 acting on the chocks 7 ', 7 ".

Due to the fact that in the multi-roll stand according to FIGS. 4 to 7 the lateral distance between the support rollers 8 ', 8 "or 9', 9" can be varied between the maximum dimension 13 'and the minimum dimension 13 ", there is also the possibility, adjust these support rollers if necessary so that they can also act on the bales of the work rolls 5 'and 5 "in the area of the belt travel zone. This option is particularly advantageous if coarse pre-stitches are to be carried out on the rolled strip using the multi-roll stand.

It is advantageous with all of the above-described multi-roll stands that they can be equipped with work rolls 5 'and 5 "in which the bale length to the bale diameter can easily have a ratio that is between 5: 1 and 15: 1. The bending stiffness of this relative to Bale length working rolls 5 'and 5 "having a small diameter are achieved on the one hand in that their common vertical axis plane 6-6 is offset from the common vertical axis plane 4-4 of the support rolls 3', 3" and / or the intermediate rolls 12 ', 12 "and on the other hand in that the bales these work rolls 5 'and 5" the support rollers 8', 8 "and 9 ', 9" are assigned.

6 and 7, the structure of the adjusting devices for the support rollers 8 ', 8 "and also the adjusting device for varying the lateral distance between them can be seen.

In each case two support rollers 8 'or 8 "or 9' or 9" assigned to the same work roll 5 'or 5 "are essentially parallel to the rolling direction against the bale of the work rolls 5' or 9" by means of a guide cross member 15 'or 15 " . 5 "can be adjusted. The guide cross members 15 'and 15" are held slightly against the horizontally inclined slideways 16', 16 "of the roller stand 1 and are acted upon by hydraulic cylinders 17 'and 17", of which in FIGS 7 only the piston rods are indicated.

The support rollers 8 'or 8 "or 9' or 9" can be continuously displaced along the guide cross member 15 'or 15 "by means of bearing blocks 18', 18". For this purpose, each bearing block 18 'or 18 "is equipped with an adjusting nut 19' or 19" which is in permanent engagement with a threaded spindle 20 'or 20 "and, for example, mechanically via a bevel gear from an electric motor or the like In this way, not only can the support of the work rolls 5 'and 5 "be optimally matched to the respective operating conditions, but it is also possible to force a precisely defined bending deformation onto these work rolls 5' and 5" but also that the construction of multi-roll stands shown in the drawing and described above ensures perfect lubrication of the work rolls 5 'and 5 "from both sides, because the spray nozzles for the lubricating and / or cooling medium also in the area of the support rollers 8', 8 "or 9 'and 9" can be brought up close to the circumference of the work rolls 5' and 5 ", as can be easily seen in FIGS. 1, 2 and 6.

Finally, it should also be mentioned that it is also within the scope of the invention to use supporting saddles instead of the supporting rollers 8 ', 8 "or 9', 9", if necessary hydrostatically interacting with the working rollers 5 'and 5 ", which then have the same Function like the support rollers.

The Anste! Izy) inder17 'and 17' for the guide trusses 15 ', 15 "can be equipped with a total and differential pressure control system working in parallel. It is also particularly expedient if the setting of the minimum side component is carried out automatically via a calculation, so that optimal operation of the multi-roll stands can be achieved at any time.

Claims (9)

1. Multi-roll stand with two backing rolls (3', 3") and two working rolls (5', 5") each borne by means of respective chocks (7', 7") in the windows (2) of the roll housing (1), in which the working rolls (5', 5") are entrained through frictional drive from the driven backing rolls (3', 3") as well as shifted (6-6) out of the vertical axial plane (4-4) of the backing rolls (3', 3") for their horizontal support, wherein the rolled strip (10) subject to the rolling process is arranged in the roll gap between the barrels of both the working rolls (5', 5"), characterised thereby, that the barrels of the working rolls (5', 5") project by both their end portions beyond the longitudinal edges of the rolled strip (10) and also beyond the barrel ends of the backing rolls (3', 3"), that backing rollers (8', 8" ; 9', 9") or rolls or also hydrostatic backing saddles are associated with these end portions of the barrels of the working rolls (5', 5") at least at that side, towards which the axial plane (6-6) of the working rolls (5', 5") is arranged to be displaced relative to the axial plane (4-4) of the backing rolls (3', 3"), and that each support roller (8', 8" ; 9', 9") or roll or also each support saddle is settable substantially horizontally and parallelly to the rolling direction and outside the rolled strip width (13 ; 13', 13") against the end portions of the barrels of the working rolls (5', 5") (11 ; Figs. 1 and 3 or 17', 17" ; Figs. 6 and 7).

2. Multi-roll stand with two backing rolls (3', 3"), two intermediate rolls (12', 12") and two working rolls (5', 5") each borne by means of respective chocks (7', 7") in the windows (2) of the roll housings (1), in which the working rolls (5', 5") are entrained through frictional drive from the intermediate rolls (12', 12"), which are either driven directly or however entrained through frictional drive from the driven backing rolls (3', 3") as well as shifted (6-6) out of the vertical axial plane (4-4) of the backing rolls (3', 3") and the intermediate rolls (12', 12") for their horizontal support, wherein the rolled strip (10) subject to the rolling process is arranged in the roll gap between the barrels of both the working rolls (5', 5"), characterised thereby, that the barrels of the working rolls (5', 5") project by both their end portions beyond the longitudinal edges of the rolled strip (10) and at least also beyond the barrel ends of the backing rolls (3', 3"), that backing rollers (8', 8"; 9', 9") or rolls or also hydrostatic backing saddles are associated with these end portions of the barrels of the working rolls (5', 5") at least at that side, towards which the axial plane (6-6) of the working rolls (5', 5") is arranged to be displaced relative to the axial plane (4-4) of the backing rolls (3', 3") and the intermediate rolls (12', 12"), and that each support roller (8', 8" ; 9', 9") or roll or also each support saddle is settable substantially horizontally and parallelly to the rolling direction and outside the rolled strip width (13 ; 13', 13") against the end portions of the barrels of the working rolls (5', 5"), (11 ; Fig. 2).

3. Multi-roll stand according to claim 1 or 2, characterised thereby, that each backing roll (8', 8" ; 9', 9") or roller or each backing saddle is shiftable (13', 13" or 18', 18" ; 19', 19" ; 20', 20") substantially horizontally transversely to the rolling direction along the barrels of the working rolls (5', 5") as well as also settable (11 ; Figs. 1 to 3 or 17', 17"; Figs. 6 and 7) against these substantially horizontally and parallelly to the rolling direction.

4. Multi-roll according to one of the claims 1 and 3 or 2 and 3, characterised thereby, that two backing rolls (8', 8" ; 9', 9") or rollers or also backing saddles are associated (Figs. 3 and 5) with each working roll (5', 5") at least at that side, towards which the axial plane (6-6) of the working rolls (5', 5") is arranged to be displaced relative to the axial plane (4-4) of the backing rolls (3', 3") or also of the intermediate rolls (12', 12"), and that the lateral spacing (13 ; 13', 13") between these backing rolls (8' and 8"; 9' and 9") is in that adjustable over a range which extends at least from the maximum rolled strip width (13') to the minimum rolled strip width (13").

5. Multi-roll stand according to one of the claims 1, 3 and 4 or 2 to 4, characterised thereby, that the backing rolls (8', 8" ; 9', 9") or rollers or also backing saddles are shiftable transversely to the rolling direction along the barrel of the working rolls (5', 5") as far as into the rolling contact range of the same with the rolled strip (10).

6. Multi-roll stand according to one of the claims 1 and 3 to 5 or 2 to 5, characterised thereby, that the backing rolls (8', 8" ; 9', 9") or rollers or also backing saddles are settable (17', 17") by means of crossbeam guides (15', 15") parallelly to the rolling direction against the barrels of the working rolls (5', 5") and/or held (18', 18" ; Figs. 6 and 7) to be shiftable (19', 20' ; 19", 20") along the same transversely to the rolling direction.

7. Multi roll stand according to one of the claims 1 and 3 to 6 or 2 to 6, characterised thereby, that each crossbeam guide (15' or 15") carries both the backing rolls (8' and 8" ; 9' and 9") or rollers or also backing saddles respectively associated with each working roll (5' or 5").

8. Multi roll stand according to one of the claims 1 and 3 to 7 or 2 to 7, characterised thereby, that both the backing rolls (8' and 8" ; 9' and 9") or rollers or also backing saddles are settable together by way of their crossbeam guide (15' and 15") parallelly to the rolling direction against the barrel of the associated working roll (5' and 5") as well as shiftable likewise together, but one in opposite sense relative to the other transversely to the rolling direction along the barrel of the concerned working roll (5' and 5").

9. Multi roll stand according to one of the claims 1 and 3 to 8 or 2 to 8, characterised thereby, that the setting drive (17' and 17") for the crossbeam guides (15' and 15") is formed by hydraulic cylinders, whilst mechanical drives with threaded spindles (20' and 20") and adjusting nuts (19' and 19") are provided (Figs. 6 and 7) for the longitudinal adjustment of the backing rolls (8' and 8" ; 9' and 9") or rollers or also backing saddles on the crossbeam guides (15' and 15").

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