Method and device for guiding and centring a metal rolling stock in a rolling mill train

Abstract

The present invention relates to a method and apparatus for guiding and centering a metal workpiece (2) in a rolling mill unit (1) having at least one assembly arranged in a rolling line and at least one mill stand (3) for forming the workpiece, wherein the method includes using lateral guide devices (8, 9, 10) that apply lateral forces to the moving workpiece (2) at different locations on the rolling line, wherein the method further includes guiding and centering the workpiece (2) with a first lateral guide device (8) before a first assembly of the rolling mill unit (1) and / or before a first mill stand (3), and oriented the workpiece (2) transversely to the rolling line downstream with a second lateral guide device (9), wherein guiding and centering includes guiding the workpiece (2) in a funnel-shaped manner, a surface manner, and a point manner.

Description

Technical Field

[0001] The present invention relates to a method for guiding and centering a metal workpiece in a rolling mill unit having an assembly arranged in a rolling line and a mill stand for forming the workpiece, wherein the method includes using lateral guiding devices that apply lateral forces to the moving workpiece at different locations on the rolling line, wherein the method further includes guiding and centering the workpiece with a first lateral guiding device before a first assembly of the rolling mill unit and / or before a first mill stand, and oriented the workpiece parallel to the rolling line downstream along the transport direction of the workpiece with a second lateral guiding device.

[0002] The present invention also relates to apparatus for performing the method. Background Technology

[0003] This method is known, for example, from patent document EP 2 445 659 B1. The method described in patent document EP 2 445 659 B1 includes final rolling a slab into strip in an apparatus having at least one furnace, at least one processing device arranged after the furnace along the slab's transport direction, and a rolling mill arranged after the at least one processing device along the slab's transport direction. A device is provided by which a force can be applied to the side of the slab to move its axis such that it aligns with a predetermined position transverse to the slab's transport direction, particularly with the axis of the rolling mill. The method includes a first device for applying a lateral force to the slab and a second device for applying a lateral force to the slab. The first device acts on the slab at a first position, and the second device acts on the slab at a second position, wherein the second position is spaced apart from the first position along the slab's transport direction. The first position is located after the furnace, and the second position is located before, within, or after the at least one processing device.

[0004] In the embodiment specifically described in patent document EP 2 445 659 B1, the second position is located before the processing device in the form of a descaling device. A mechanical lateral guide for the rolled piece, in the form of a lateral guide plate, is disposed immediately before the first mill stand of the rolling mill unit. This linear guide at the entrance of the first forming equipment, more precisely the first mill stand, must be designed not to contact the rolled piece, otherwise there is a risk of damaging the edges of the rolled piece. Therefore, this linear guide for the rolled piece is typically positioned at a certain distance from the rolled piece. The lateral guide device according to patent document EP 2 445 659 B1 ensures that the slab is centered before the rolling mill unit, but it is not possible to align the slab transversely to the rolling line with this device.

[0005] For example, an apparatus and method for laterally guiding rolled or cast articles on a transport unit is known from patent document WO 2014 / 102189 A1. The apparatus includes a first guide plate and a second guide plate, wherein the guide plates are arranged opposite each other on both sides of the transport unit and are each connected to at least one adjusting drive for movement along the width of the transport unit, wherein the adjusting drive can be manipulated perpendicular to the transport direction of the rolled or cast article. By manipulating the correspondingly associated adjusting drive, the guide plates can be positioned independently such that they are at a predetermined angle to the associated longitudinal axis of the rolled or cast article and / or at different distances from the center of the transport unit, wherein the guide plates respectively have contact rollers that can move by the movement of the guide plates while in contact with the side edge of the rolled or cast article, so as to guide and / or laterally press the rolled or cast article. This structure is complex. It is difficult to precisely set the forces acting laterally on the rolled article using this approach. Furthermore, no advice is found in patent document WO 2014 / 102189 on how to keep the rolled piece in the middle of the rolling mill, or more precisely, in the rolling line until the forming process is finished.

[0006] Other prior art is known from patent document JP H05293526 A. Summary of the Invention

[0007] Therefore, the objective of this invention is to provide a method and apparatus of the type mentioned at the beginning, which enables the centering and transverse orientation of the rolled piece within the rolling mill unit, more precisely within the transport unit of the rolling mill, wherein wear and / or damage at the guide section and at the rolled piece should be avoided simultaneously. In particular, the method and apparatus according to the invention also enable the holding of the rolled piece in the middle of the rolling mill unit, more precisely in the rolling line, until the end of the rolling process.

[0008] The objective of this invention is achieved by the method and apparatus according to the invention. Other advantageous designs of the invention are also described below.

[0009] According to one aspect of the invention, a method is provided for guiding and centering a metal workpiece in a rolling mill unit, more specifically in the transport unit of the rolling mill unit, the rolling mill unit having an assembly arranged in a rolling line and a mill stand for forming the workpiece, wherein the method includes using lateral guiding devices that apply lateral forces to the moving workpiece at different locations on the rolling line, wherein the method further includes at least guiding and centering the workpiece with a first lateral guiding device before a first assembly of the rolling mill unit and / or before a first mill stand, and oriented the workpiece transversely to the rolling line downstream with a second lateral guiding device. The method is particularly characterized in that the guiding and centering includes guiding the workpiece in a funnel-shaped manner, a surface manner, and a point manner.

[0010] In the context of this invention, an assembly includes a shearing machine, a descaling machine, a side press (Staucher), a strip roll box, etc. In the context of this invention, the term "assembly" is used to distinguish it from the mill stand of a rolling mill unit, which is used to shape the rolled product. Flat slabs, thin flat slabs, or pre-formed strip can be provided as rolled products. The rolling mill unit can be configured as a hot strip rolling mill unit.

[0011] The method first includes capturing the rolled piece by induction centering (i.e., at least before the first assembly) as it enters the rolling mill, preferably using a suitable funnel with a first lateral guide having a relatively small tilt angle, such as 1° to 30°, preferably 5° to 20°, for reliable transport of the strip during induction. The method also includes centering and oriented the rolled piece for the next process step, such as shearing. The method then includes centering and transporting the rolled piece head and oriented it transversely to the rolling line for initiating subsequent forming processes. Guiding the rolled piece relatively narrowly with a second lateral guide allows for centering and holding the rolled piece during forming, such that the forming process occurs in a desired centered position within the mill stand of the rolling mill unit.

[0012] The rolling mill unit according to the invention can be, for example, a finishing mill unit following a roughing mill unit. The rolling mill unit can also be a roughing mill unit comprising one or more roughing stands.

[0013] The multi-stage method according to the invention has the advantage of engaging the edges of the rolled piece without damage and with low wear, which is ensured in particular by point guidance and centering of the rolled piece.

[0014] The advantage of combining surface and point guidance for centering is that, until the centering is completed, the roll is risk-free and reliably guided into or out of the roll head or roll foot at an angle or eccentricity by a suitable funnel structure. Point guidance has a lower load, thus not only guiding more reliably but also limiting the load on the component.

[0015] In a preferred variation of the method, a third lateral guide is also used for centering the rolled piece. An assembly, such as a heating device and a separating device, can be arranged between the first and third lateral guides. The advantage of this two-stage centering is that forces applied to the edges of the rolled piece can be applied particularly without damage. Alternatively, the first and third lateral guides can be arranged immediately after each other downstream along the rolling direction with a relatively small first distance, while the first and second lateral guides and / or the third lateral guides can be arranged downstream along the rolling direction with a relatively large distance between each other. This allows a relatively large moving torque to be introduced into the rolled piece, more specifically the hot-rolled strip, with a relatively small force, so that it is oriented transversely to the conveying direction upon entering the mill.

[0016] Preferably, the first lateral guide device and the second lateral guide device are arranged successively along the rolling direction at a large distance between 6 m and 20 m, while the first lateral guide device and the third lateral guide device are arranged close to each other at a smaller second distance, for example, 1 m to 6 m.

[0017] Specifically, the first lateral guide and the third lateral guide can be designed to have different robustness, or more precisely, to withstand different magnitudes of force. For example, it can be specified that the first lateral guide is designed to withstand greater forces than the third lateral guide.

[0018] In a preferred variation of the method according to the invention, all lateral guides are engaged and disengaged from the workpiece using a controllable, variable adjustment force. For this purpose, the lateral guides can be adjusted, for example, by a hydraulic cylinder having a position sensor and a pressure sensor. Advantageously, the method includes force and / or position adjustment of the lateral guides. Furthermore, the control and / or adjustment of the lateral guides can be set according to the position of the workpiece within the rolling mill unit.

[0019] The method appropriately specifies the use of a third lateral guide device to guide the rolled piece in another funnel-shaped, surface, and point-like manner.

[0020] In another suitable and advantageous variation of the method according to the invention, the orientation of the rolled piece is specified by a second lateral guide immediately preceding the first mill stand of the rolling mill unit. "Immediately preceding" in the sense of this application means without the insertion of any additional assembly or mill stand.

[0021] Preferably, the lateral guide device is actively adjusted toward the workpiece, preferably with a contact force less than the workpiece's plastic deformation capacity. If the workpiece does not press against the lateral guide device due to its own kinetic energy, this contact force can be, for example, between 5 kN and 50 kN. Adjusting the lateral guide device toward the workpiece is also preferably done in such a way that both sides of the lateral guide device contact the workpiece. The magnitude of the contact force applied by the lateral guide device is always determined such that it does not cause lateral pressure on the workpiece at the edges.

[0022] The side press is not a lateral guiding device in the sense of this invention.

[0023] To ensure that the workpiece is oriented transversely to the rolling line, the guide for the workpiece preferably includes a narrower guide than the guide for centering, so as to ensure that the workpiece remains in the rolling line.

[0024] Furthermore, it is advantageous that the first lateral guide temporarily disengages from the workpiece after its initial contact with the workpiece and before its second contact with the workpiece by means of a second lateral guide, a third lateral guide, or at least one additional lateral guide. This has the advantage that the strip head, which is moved into the middle of the mill by the first lateral guide, is also transported in the middle of the mill until it subsequently contacts another lateral guide.

[0025] According to another advantageous variation of the method, sensors are used to detect the orientation and position of the workpiece relative to the rolling line, and the adjusting movement and / or adjusting force of the lateral guide device are controlled based on the position and / or orientation of the workpiece. The orientation of the workpiece relative to the rolling line can be detected by a pressure sensor in the adjusting cylinder of the lateral guide device or by a separate sensor.

[0026] The position of the rolled piece relative to the rolling line is advantageously detected by a strip tracking system, which detects the current position of the head and foot of the rolled piece.

[0027] The first lateral guide device, the second lateral guide device, and / or the third lateral guide device may be designed to withstand different forces and / or be able to abut against the edge of the rolled piece with different forces, so as to have a positive effect on the edge of the rolled piece in this way, so as to achieve, for example, pre-hardening of the rolled edge before the first processing step if necessary, or to prevent edge hardening.

[0028] The objective of this invention is also achieved by means of means particularly suited to and determined for performing methods of the type described above.

[0029] According to one aspect of the invention, an apparatus is provided for guiding and centering a metal workpiece in a rolling mill unit, wherein the rolling mill unit includes an assembly arranged in a rolling line and a rolling mill stand for forming the workpiece, the apparatus including at least a first lateral guide device and a second lateral guide device, the lateral guide devices being arranged at different positions spaced apart from each other on the rolling line, wherein at least the first lateral guide device forms an inlet centering portion of the workpiece and is arranged at a large first distance before the first rolling mill stand, and at least the second lateral guide device is arranged at a smaller second distance before the first rolling mill stand and configured to orient the workpiece parallel to and centered relative to the rolling line.

[0030] The device is characterized in particular by having at least a first lateral guide with a surface guide for the rolled piece and additionally with a point guide for the rolled piece, wherein the point guide is preferably configured as a roll-side guide.

[0031] The first and second lateral guide devices can be arranged at a relatively large distance from each other so that when the workpiece is oriented transversely to the centerline of the mill, a large torque can be introduced into the workpiece with the lowest possible contact force.

[0032] Preferably, at least a third lateral guide device is also provided. The third lateral guide device may be arranged at a relatively short distance after the first lateral guide device. The second lateral guide device and / or the third lateral guide device each include a surface guide portion and additionally include at least one point guide portion of the rolled piece.

[0033] According to a variant, the method and apparatus according to the invention include at least two lateral guides arranged close to each other, each lateral guide having adjustable rollers for guiding the rolled piece into contact without edge damage; the rollers move independently and are flexibly adjustable. These guides are correspondingly formed by a combination of surface guides and point guides, wherein a first and a third lateral guide form a double funnel through which the rolled piece is first centrally guided into subsequent assemblies prior to the forming step, and centrally enters these assemblies.

[0034] As described above, the surface guide is essentially constructed as a funnel-shaped guide.

[0035] In an advantageous variation of the device according to the invention, the roller lateral guide is arranged on the departing side and / or the inlet side of the funnel-shaped guide. For example, it may be specified that the roller lateral guide, more precisely, the point-type guide, is arranged on the departing side of the funnel-shaped guide at the first and third lateral guide devices. To guide and oriented the rolled piece more narrowly across the rolling line, the second lateral guide device may advantageously have a roller lateral guide on the inlet side.

[0036] Lateral guides can be advantageously adjusted on both sides of the rolled piece using a pre-given force, preferably at different angular positions. Orienting the lateral guides at different angular positions relative to the center of the mill, more precisely relative to the rolling line, and therefore relative to the side edges of the rolled piece, is particularly advantageous for funnel-shaped arrangements of the first and third lateral guides. Attached Figure Description

[0037] Advantageous design features of the present invention are illustrated below with reference to the accompanying drawings. Wherein:

[0038] Figure 1 A schematic top view of a portion of a rolling mill unit having a device for guiding and centering rolled pieces according to the invention is shown;

[0039] Figure 2 It shows the relationship with Figure 1 The corresponding view, in which the rolled piece is in another position;

[0040] Figure 3 Enlarged views of the guide portions of the rolled piece at multiple locations are shown; and

[0041] Figure 4 A schematic diagram showing multiple locations of the rolled piece in a rolling mill unit according to the method of the present invention is shown. Detailed Implementation

[0042] The following is a reference. Figure 1 and Figure 2 The illustration shows a top view of the entrance area of ​​a rolling mill unit 1, to which a strip 2 from a previous process (e.g., a heating furnace, casting machine, or roughing stand for a forming process) is fed. The rolling mill unit 1 according to the invention is a finishing mill unit, which preferably comprises multiple rolling stands, of which a first rolling stand 3 is roughly shown. The strip 2 is, for example, hot-rolled strip, which passes through a shearing machine 4 and a descaling machine 5 in the rolling mill unit 1 before being conveyed to the first rolling stand 3. The strip 2, in the form of hot-rolled strip, is here conveyed via a roller conveyor 6 in a known manner to the first assembly of the rolling mill unit 1, which is in the form of a shearing machine 4, currently constructed as a drum shearing machine. In the illustration, the strip 2 passes through the rolling mill unit 1 from left to right, wherein… Figure 1 The rolled piece 2 is shown, and the head 7 of the rolled piece (strip head) is located on the roller table 6 in the area of ​​the first lateral guide device 8.

[0043] Immediately following the first lateral guide device 8 along the transport direction of the rolled piece 2 is the third lateral guide device 10, which is configured to roughly correspond to the first lateral guide device 8. At a distance A1 from the first lateral guide device 1, the second lateral guide device 9 is arranged close to the first mill stand 3. In the illustrated embodiment, the first lateral guide device 8 and the third lateral guide device 10 are arranged close to each other at a small second distance A2, for example, 1 m to 6 m, which is significantly smaller than the distance A1 between the third lateral guide device 10 and the second lateral guide device 9, for example, 6 m to 20 m. The first lateral guide device 8 is arranged at a large distance before the first mill stand 3, while the second lateral guide device 9 is arranged close to the first mill stand 3. The first lateral guide device 8 and the third lateral guide device 10 are configured in a suitable funnel shape, forming a funnel shape that deviates from the parallel line by, for example, 1° to 30° and gradually tapers along the transport direction. The angular positions of the funnels can be varied and different.

[0044] A shearing machine 4 is first arranged between the third lateral guide 10 and the second lateral guide 9 along the transport direction of the rolled piece 2, followed immediately by a descaling machine 5. Other configurations of this arrangement are conceivable within the scope of the invention. For example, the first lateral guide 8 and the third lateral guide 10 may be positioned before the coil box and the shearing machine arranged behind it along the transport direction. The distance A1 from the second lateral guide 9 to the third lateral guide 10 is chosen to be relatively large so that the maximum leverage arm can be applied to the rolled piece 2 between these two spaced-apart contact points, allowing the rolled piece to be oriented in the target position and moved along the ideal line, more precisely, along the centerline 11 of the mill unit 1, transverse to the transport direction on the roller table 6. The corresponding actual orientation of the rolled piece 2 is indicated by a thick dashed line 12 in the figure.

[0045] As can be especially from Figure 3 As can be seen, the first lateral guide device 8, the second lateral guide device 9, and the third lateral guide device 10 each include two guide legs 13. These guide legs can be pivotally adjusted or adjusted laterally to the centerline 11 of the rolling mill by means of adjusting cylinders 14. The adjusting cylinder 14 is preferably constructed as a hydraulic cylinder supported against a corresponding support. Each guide leg 13 forms a guide surface oriented toward the side edge of the workpiece 2. In the case of the first lateral guide device 8 and the third lateral guide device 10, a point support in the form of a guide roller 15 is attached to the guide surface. The guide legs 13 of the first lateral guide device 8 and the third lateral guide device 10 are respectively oriented or adjusted into a funnel shape, so that the first lateral guide device 8 and the third lateral guide device 10 form a double funnel, which realizes the centering of the workpiece 2.

[0046] like Figure 1As shown, the rolled piece 2, which is eccentrically arranged on the roller conveyor 6, first contacts the guide leg 13 of the first lateral guide device 8. In this case, the first lateral guide device 8 first performs the function of capturing the rolled piece 2, which may be constructed, for example, as a slab, a thin slab, or a pre-formed strip.

[0047] The method involves setting up a suitable funnel with a small inclination angle so that the workpiece 2 initially contacts the first lateral guide device 8 with minimal damage. Further centering is then achieved using a third lateral guide device 10. The guide rollers 15 of the first and third lateral guide devices 8 and 10 then only point-to-point contact the edge of the workpiece 2. Thus, the workpiece 2 is conveyed substantially centered to the shearing machine 4 and subsequently the descaling machine 5.

[0048] Then, the head 7 of the rolled piece reaches the guide region of the third lateral guide 10, which is configured to correspond to the first lateral guide 8.

[0049] The second lateral guide 9 is positioned directly above the first mill stand 3 of the mill unit 1. The second lateral guide 9 also includes two guide legs 13; however, unlike the first lateral guide 8 and the third lateral guide 10, when viewed along the transport direction of the rolled piece 2, the guide roll 15 is positioned upstream of the guide legs, i.e., at the entrance side of the guide portion formed by the guide legs 13. Upstream of the guide roll of the second lateral guide 9 is a funnel that passes through together with the guide roll 15, ensuring that the head of the rolled piece 7 enters between the guide rolls of the second lateral guide 9. The width of the opening between the guide legs 13 of the second lateral guide 9 is smaller than the width of the funnel openings of the first lateral guide 8 and the third lateral guide 10. Ideally, the guide legs 13 of the second lateral guide 9 are oriented parallel to each other. The guide roller 15 holds the workpiece 2 within the centerline 11 of the rolling mill unit 1 throughout the rolling process, even if the foot 16 of the workpiece 2 has left the guiding area of ​​the first lateral guide device 8 and the third lateral guide device 10. Figure 4 As shown in d. Even if the rolling foot 16 of the rolling piece 2 has left the guide roller 15 of the second lateral guide device 9, the guide leg 13 can still hold the rolling piece.

[0050] Figure 4 a) to Figure 4 c) shows a schematic sequence of rolled pieces entering rolling mill unit 1, wherein, Figure 4 d) Depicts a state in which the foot 16 of the rolled piece 2 is still located between the second lateral guide devices 9, and the immediately following section of the rolled piece is located on the roller table 6 of the mill unit 1.

[0051] In the method according to the invention, the workpiece head 7 first enters the funnel opening of the first lateral guide device 8. In the event of workpiece 2 deviation, the workpiece head 7 will first contact one of the guide legs 13 of the first lateral guide device 8 and capture the workpiece 2. Then, the workpiece 2 reaches the entrance region of the third lateral guide device 10. The third lateral guide device 10 achieves the centering orientation of the workpiece 2 for use in the next process step, for example, shearing by means of a shearing machine 4 downstream of the third lateral guide device 10.

[0052] Figure 4 (b) illustrates a state in which the head 7 of the rolled piece 2 has just reached the entry region of the second lateral guide 9. In this position, reliable guidance and orientation of the rolled piece 2 are ensured by all the lateral guides 8, 9, and 10, allowing the head 7 to be centrally transported to the forming process through the first mill stand 3 and to remain in this position throughout the rolling process. Figure 4 d) shows the state of the rolled piece 2 in which the foot 16 of the rolled piece is still located in the guide region having the second lateral guide device 9.

[0053] List of reference numerals in the attached diagram:

[0054] 1. Rolling Mill Unit

[0055] 2 Rolled parts

[0056] 3 Rolling Mill Stand

[0057] 4. Shearing machine

[0058] 5. Descaling machine

[0059] 6 roller conveyors

[0060] 7. Head of rolled piece

[0061] 8 First lateral guiding device

[0062] 9 Second lateral guiding device

[0063] 10 Third lateral guiding device

[0064] 11. Centerline of the rolling mill unit

[0065] 12 Actual line of the rolled piece

[0066] 13. Guide the legs

[0067] 14 Adjusting cylinder

[0068] 15 Guide rollers

[0069] 16. Rolled part foot

[0070] A1 The large first distance between the first lateral guiding device and the second lateral guiding device

[0071] A2 The small second distance between the first lateral guiding device and the third lateral guiding device.

Claims

1. A method for guiding and centering a metal workpiece (2) in a rolling mill unit (1), said rolling mill unit having at least one assembly arranged in a rolling line and at least one rolling mill stand (3) for forming said workpiece (2), wherein, The method includes using lateral guide devices (8, 9, 10) that apply lateral forces to the moving workpiece (2) at different locations on the rolling line, wherein the method further includes using a first lateral guide device (8) to center the workpiece (2) before the first assembly of the rolling mill unit (1) and / or before the first rolling mill stand (3), and using a second lateral guide device (9) downstream along the transport direction of the workpiece (2) to orient the workpiece (2) transverse to the rolling line, characterized in that the centering includes guiding the workpiece (2) in a funnel-shaped, surface-shaped, and point-shaped manner, and a third lateral guide device (9) is also used for centering the workpiece (2). 10) The lateral guide devices (8, 9, 10) respectively have a surface guide portion of the rolled piece (2) and additionally a point guide portion of the rolled piece (2), wherein the point guide portion is configured as a roll-side guide portion, the surface guide portion is basically configured as a funnel-shaped guide portion, and wherein the lateral guide devices (8, 9, 10) are respectively actively adjusted toward the rolled piece (2), wherein the first lateral guide device (8) and the third lateral guide device (10) are arranged adjacent to each other at a relatively small first distance (A2) downstream along the rolling direction, and the first lateral guide device (8) and the second lateral guide device (9) are arranged at a relatively larger distance (A1) between each other downstream along the rolling direction.

2. The method according to claim 1, characterized in that, The lateral guides (8, 9, 10) are engaged and disengaged from the rolled piece (2) by a controllable, variable adjustment force.

3. The method according to any one of claims 1 to 2, characterized in that, The third lateral guide device (10) is used to provide another funnel-shaped, surface and point-shaped guide for the rolled piece (2).

4. The method according to any one of claims 1 to 2, characterized in that, The orientation of the rolled piece (2) is achieved by the second lateral guide device (9) immediately preceding the first mill stand (3) of the mill unit (1).

5. The method according to any one of claims 1 to 2, characterized in that, The lateral guide device (8, 9, 10) is adjusted toward the rolled piece (2) by a contact force less than the plastic deformation capacity of the rolled piece (2).

6. The method according to any one of claims 1 to 2, characterized in that, The guide for oriented the rolled piece (2) parallel to the rolling line (11) includes a guide of the rolled piece (2) that is at least narrower than the guide in the inlet.

7. The method according to claim 6, characterized in that, The guidance of the rolled piece (2) for oriented parallel to the rolling line (11) includes the guidance of the rolled piece (2) to contact the rolled piece.

8. The method according to any one of claims 1 to 2, characterized in that, After the first lateral guide device (8) makes a first contact with the rolled piece (2) and before it makes a second contact with the rolled piece (2) by means of the second lateral guide device (9) or the third lateral guide device (10) or at least one other lateral guide device, it temporarily disengages from the rolled piece (2).

9. The method according to any one of claims 1 to 2, characterized in that, Sensors are used to detect the orientation and position of the workpiece (2) relative to the rolling line (11), and the adjustment movement and / or adjustment force of the lateral guide devices (8, 9, 10) are controlled according to the position and / or orientation of the workpiece (2), or the position of the lateral guide devices is adjusted at a selectable distance relative to the rolling line.

10. An apparatus for guiding and centering a metal workpiece (2) in a rolling mill (1), the apparatus being used to perform the method according to any one of claims 1 to 9, wherein, The rolling mill unit (1) includes at least one assembly arranged in the rolling line (11) and at least one mill stand for forming the rolled piece (2). The device includes at least a first lateral guide (8), a second lateral guide (9), and a third lateral guide (10), which are arranged at different spaced-apart positions on the rolling line (11). At least the first lateral guide (8) forms the center of the entry of the rolled piece (2), and at least the second lateral guide (9) is arranged before the first mill stand (3) and configured to orient the rolled piece parallel to and centered relative to the rolling line. The first lateral guide device, the second lateral guide device (9) and the third lateral guide device (10) respectively have a surface guide portion of the rolled piece and additionally have a point guide portion of the rolled piece, wherein the point guide portion is constructed as a roll-side guide portion, the surface guide portion is basically constructed as a funnel-shaped guide portion, and the lateral guide devices (8, 9, 10) can be adjusted accordingly on both sides of the rolled piece (2) with a predetermined force, wherein the first lateral guide device (8) and the second lateral guide device (9) are arranged at a first distance (A1) from each other, wherein the second lateral guide device is arranged close to the first mill stand (3).

11. The apparatus according to claim 10, characterized in that, The second lateral guide device (9) and / or the third lateral guide device (10) respectively have a surface guide portion of the rolled piece (2) and additionally have at least one point guide portion of the rolled piece (2).

12. The apparatus according to claim 10, characterized in that, The surface-type guide is at least partially constructed as a funnel-shaped guide.

13. The apparatus according to claim 11, characterized in that, The surface-type guide is at least partially constructed as a funnel-shaped guide.

14. The apparatus according to claim 12, characterized in that, The roller-side guide is arranged on the exit side of the funnel-shaped guide and / or the inlet side of the funnel-shaped guide.

15. The apparatus according to any one of claims 10 to 14, characterized in that, The lateral guide devices (8, 9, 10) can be adjusted at different angular positions on both sides of the rolled piece (2).

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