Method and apparatus for guiding and centering a rolled metal material in a rolling mill

Abstract

The present invention relates to a method and an apparatus for guiding and aligning a metal stock (2) in a rolling mill (1) having at least one unit arranged in the rolling line and at least one roll stand (3) for shaping the stock (2), the method comprising the use of lateral guide means (8, 9, 10) for applying lateral forces to the moving stock (2) at different locations of the rolling line, the method further comprising an entrance aligning process of the stock (2) in front of a first unit and / or a first roll stand (3) of the rolling mill (1) by a first lateral guide means (8) and downstream a positioning process of the stock (2) transverse to the rolling line by a second lateral guide means (9), characterized in that the entrance aligning process comprises a funnel-shaped surface guiding of the stock (2) and a point-shaped guiding of the stock (2).

Description

Technical Field

[0001] The present invention relates to a method for guiding and centering a metal rolled material in a rolling mill having a unit arranged in a rolling line and a roll stand for shaping the rolled material, the method including the use of lateral guide means for applying a lateral force to the moving rolled material at different locations in the rolling line, the method further including an inlet centering process of the rolled material in front of a first unit and / or a first roll stand of the rolling mill by a first lateral guide means, and a position adjustment process of the rolled material parallel to the rolling line by a second lateral guide means downstream in the conveying direction of the rolled material.

[0002] The present invention further relates to an apparatus for carrying out the method.

Background Art

[0003] Such a method is known, for example, from European Patent No. 2445659. The method described in European Patent No. 2445659 includes a process of finish rolling a slab into a strip in an apparatus comprising at least one furnace, at least one processing device arranged downstream of this furnace in the transfer direction of the slab, and a rolling mill arranged downstream of this at least one processing device in the transfer direction of the slab, and there are means for applying a force to the side surface of the slab in order to move the axis of the slab according to a predetermined position transverse to the transfer direction of the slab, in particular according to the axis of the rolling mill. The method includes a first means for applying a lateral force acting on the slab at a first location to the slab, and a second means for applying a lateral force acting on the slab at a second location to the slab, the second location being spaced apart from the first location in the transfer direction of the slab, the first location being located after the furnace, and the second location being located in front of, inside or after at least one processing device.

[0004] In the case of the embodiment specifically described in European Patent No. 2445659, the second location is located in front of the processing device in the form of a descaling device. Immediately before the first roll stand of the rolling mill, a mechanical side guide for the rolled material in the form of side guide rollers is provided. Such a roller guide at the inlet of the first forming device or the first roll stand must be formed so as not to contact the rolled material, because otherwise there is a risk of damaging the edge of the rolled material. Therefore, such a roller guide for the rolled material is usually moved at a distance from the rolled material. The side guide means according to European Patent No. 2445659 ensures the centering of the slab in front of the rolling mill, but the lateral position adjustment of the slab with respect to the rolling line is not possible with this device.

[0005] Devices and methods for laterally guiding rolled or cast products on a transport line are known, for example, from WO 2014 / 102189. The device includes first and second guide rollers, which are arranged opposite each other on both sides of the transport line and are each coupled to at least one actuator for movement in the width direction of the transport line, and the actuator is operable perpendicular to the transport direction of the rolled or cast product. The guide rollers can each position the associated longitudinal axis of the rolled or cast product at a predetermined angle and / or at different intervals with respect to the center of the transport line independently of each other by operation of the associated actuator, and they each include contact rollers that can move in contact with the side edges of the rolled or cast product by movement of the guide rollers in order to guide and / or compress the rolled or cast product. This configuration is complex. The accurate setting of the force acting on the rolled material from the side is difficult with this concept. Furthermore, from WO 2014 / 102189, no proposal can be read regarding how the rolled material can be held within the center of the rolling mill or the rolling line until the end of the forming process.

[0006] Another prior art is known from JP-A-05-293526.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0008] Accordingly, the underlying problem of the present invention is to provide a method and an apparatus of the type described at the beginning that enable the rolled material to be centered and position-adjusted laterally with respect to the conveying direction within the rolling mill or in the conveying line of the rolling mill, and at the same time, wear and / or damage of the guide and the rolled material should be avoided. In particular, the method and apparatus according to the present invention should also be capable of holding the rolled material within the center of the rolling mill or in the rolling line until the end of the rolling process.

Means for Solving the Problems

[0009] The underlying problem of the present invention is solved by the method according to claim 1 and the apparatus according to claim 11. Another advantageous form of the present invention can be seen from the respective dependent claims.

[0010] According to one aspect of the present invention, there is provided a method for guiding and centering a metallic rolled material in a unit arranged in a rolling line and in a rolling mill having a roll stand for forming the rolled material or in a conveying line of the rolling mill, the method including the use of lateral guide means for applying a lateral force to the moving rolled material at different locations in the rolling line, the method further including an inlet centering process of the rolled material in front of a first unit of the rolling mill and / or a first roll stand by a first lateral guide means and a position adjustment process of the rolled material transverse to the rolling line by a second lateral guide means downstream. The method is characterized in that, in particular, the inlet centering process includes a funnel-shaped planar guide of the rolled material and a point guide of the rolled material.

[0011] The units in the meaning of the present invention are shears, scale washers, edgers, coil boxes, etc. The term "unit" is used in the meaning of the present invention to distinguish from the roll stands of the rolling mill used for forming the rolled material. As the rolled material, slabs, thin slabs or rough strips may be contemplated. The rolling mill may be formed as a hot rolling mill.

[0012] The method first includes capturing the rolled material when entering the rolling mill by an inlet centering process, i.e., in front of at least the first unit, preferably setting a suitable funnel with a first lateral guide means having a relatively small inclination angle, for example from 1° to 30°, preferably 5° to 20°, for more reliable strip conveyance at the time of entry, and adjusting the position of the rolled material to the center for the next process step, for example for a shear step. Next, the method contemplates feeding the center of the rolled material head and adjusting the position of the rolled material transverse to the rolling line to start the subsequent forming process. The relatively narrow guiding of the rolled material by the second lateral guide means enables the rolled material to be held centered during forming, so that the forming process is carried out at the expected center position of the roll stand of the rolling mill.

[0013] The rolling mill according to the present invention can be, for example, a finishing train arranged downstream of a rough train. However, the rolling line can also be a roughing mill having one or more rough stands.

[0014] The multi-stage method according to the present invention has the advantage that the engagement with the edge of the rolled material is carried out gently with little wear, which is ensured in particular by the point-shaped guide and centering of the rolled material.

[0015] The combination of the planar guide and the point-shaped guide by the inlet centering process has the advantage that the head or foot of the rolled material entering or exiting obliquely or off-center is gently turned by a suitable funnel structure until the end of the inlet centering process, and at the same time is reliably guided. The addition of the point-shaped guide is less, the guiding is more reliable, and at the same time the addition of components is limited.

[0016] In the case of a preferred variation of the method, it is contemplated that a third lateral guide means is further used for the inlet centering process of the rolled material. A unit such as a heating and separating device can be arranged between the first lateral guide means and the third lateral guide means. The two-stage inlet centering process has the advantage that the force applied to the edge of the rolled material can be applied particularly gently. The first lateral guide means and the third lateral guide means can be arranged directly one behind the other downstream in the rolling direction with a relatively small first interval, while the first lateral guide means and the second lateral guide means and / or the third lateral guide means are arranged downstream in the rolling direction with a relatively large interval from each other. Therefore, in order to laterally position the rolled material or the hot strip with respect to the transfer direction when entering the rolling mill, a relatively large displacement torque can be introduced into the rolled material or the hot strip with a relatively small force action.

[0017] Preferably, the first side guide means and the second side guide means are arranged one behind the other in the rolling direction with a large interval of 6 to 20 m, while the first side guide means and the third side guide means are arranged directly one behind the other with a small second interval of, for example, 1 m to 6 m.

[0018] In particular, the first side guide means and the third side guide means can be designed to receive different robustness or different magnitudes of force. For example, it can be contemplated that the first side guide means is designed to receive a larger force than the third side guide means.

[0019] In the case of a preferred variation of the method according to the invention, it is contemplated that all side guide means engage and disengage with the rolled material with a controllable variable adjustment force. For this purpose, the side guide means can be adjustable, for example, via a hydraulic cylinder having a position sensor and a pressure sensor. For this reason, it is advantageous if the method includes the force and / or position adjustment of the side guide means. Furthermore, the control and / or adjustment of the side guide means can be performed depending on the position of the rolled material in the rolling mill.

[0020] The method advantageously contemplates another funnel-shaped, planar and punctiform guiding of the rolled material by the third side guide means.

[0021] In another advantageous variation of the method according to the invention, it is contemplated that the position adjustment of the rolled material by the second side guide means is performed immediately before the first roll stand of the rolling mill. The "directly" in the sense of this application means without the intervention of another unit or roll stand.

[0022] Preferably, the lateral guide means is actively adjusted with respect to the rolled material with a contact force that is preferably smaller than the plastic deformation ability of the rolled material. This contact force is, for example, 5 to 50 kN when the rolled material does not push against the lateral guide means due to its inherent dynamics. The adjustment of the lateral guide means with respect to the rolled material is further preferably carried out such that both sides of the lateral guide means are in contact with the rolled material. The contact force applied by the lateral guide means is in any case dimensioned such that compression of the rolled material at the edges is not induced.

[0023] The edger is not a lateral guide means within the meaning of the present invention.

[0024] Preferably, the guiding of the rolled material includes a guide that is narrower than the guide of the entry centering process in order to position the rolled material laterally with respect to the rolling line, thereby ensuring the retention of the rolled material within the rolling line.

[0025] Furthermore, it is advantageous if the first lateral guide means is partially disengaged from the rolled material by the second or third lateral guide means or at least one other lateral guide means after the first contact with the rolled material and before the second contact with the rolled material. This has the advantage that the strip head moved towards the rolling mill center by the first lateral guide means is further conveyed at the center of the rolling mill until the next contact with another lateral guide means.

[0026] According to another advantageous variation of the method, it can be contemplated that the alignment and position of the rolled material with respect to the rolling line are detected by sensors and the adjustment movement and / or adjustment force of the lateral guide means are controlled depending on the position and / or alignment of the rolled material. The alignment of the rolled material with respect to the rolling line can be detected via a pressure sensor within the adjustment cylinder of the lateral guide means or by a separate sensor.

[0027] The position of the rolled material with respect to the rolling line is preferably detected by a strip tracking system, and the current positions of the strip head and the strip sides are detected.

[0028] The first, second and / or third lateral guiding means can each be designed to receive different forces and / or adjusted to the strip edge with different forces, thereby having a positive influence on the strip edge in this way, for example achieving pre-hardening of the strip edge before a first processing step if necessary, or preventing edge hardening.

[0029] Furthermore, the problem underlying the present invention is solved by an apparatus that is particularly suitable and configured for carrying out a method of the above type.

[0030] According to one aspect of the invention, there is provided an apparatus for guiding and centering a metal strip in a rolling mill, the rolling mill including a unit arranged in a rolling line and a roll stand for shaping the strip, and including at least first and second lateral guiding means arranged at different spaced-apart locations in the rolling line, at least the first lateral guiding means constituting an inlet centering device for the strip and being arranged in front of the first roll stand at a large first spacing, and at least the second lateral guiding means being arranged in front of the first roll stand at a small second spacing and being provided for adjusting the position of the strip parallel and centered with respect to the rolling line.

[0031] The apparatus is characterized in that at least the first lateral guiding means comprises a planar guide for the strip and additionally a point guide for the strip, the point guide preferably being formed as a roller-type lateral guide.

[0032] The first and second lateral guiding means can be arranged at a relatively large distance from each other, so that when adjusting the position of the strip transversely with respect to the center line of the rolling mill, a large torque can be introduced into the strip with a contact force that is as small as possible.

[0033] Preferably, further, at least a third lateral guiding means is provided. The third lateral guiding means can be arranged at a relatively short interval after the first lateral guiding means. The second lateral guiding means and / or the third lateral guiding means each include a planar guide and additionally at least one point guide for the rolled material. Optionally, it can be contemplated that the second lateral guiding means and / or the third lateral guiding means each preferably comprise only a point guide for the rolled material in the form of at least one roller-type lateral guide.

[0034] According to this variation, the method according to the invention and the concept of the device according to the invention include an arrangement of at least two lateral guiding means arranged directly one behind the other, having adjustable rollers for contacting the guided rolled material that are individually movable and flexibly adjustable without edge damage. These guides are each composed of a combination of a planar guide and a point guide. The first and third lateral guiding means form a kind of double funnel. By means of this double funnel, first, the rolled material is centered and guided to the next unit before the forming step, and is centered and enters this unit.

[0035] As described above, the planar guide is substantially formed as a funnel-shaped guide.

[0036] In the case of an advantageous variation of the device according to the invention, it is contemplated that the roller-type lateral guide is arranged on the outlet side and / or the inlet side of the funnel-shaped guide. For example, in the first and third lateral guiding means, it can be contemplated that the roller-type lateral guide or the point guide is arranged on the outlet side of the funnel-shaped guide. The second lateral guiding means can advantageously be provided on the inlet side of the roller-type lateral guide for a narrower guide and alignment of the rolled material transverse to the rolling line.

[0037] The lateral guide means can advantageously be adjusted with a predetermined force, preferably at different angular positions, on both sides of the rolled material. The alignment of the lateral guide means to different angular positions relative to the center of the rolling mill or the rolling line and thus relative to the side edges of the rolled material is particularly advantageous for the funnel-shaped arrangement of the first and third lateral guide means.

[0038] Advantageous forms of the present invention will be exemplified below with reference to the accompanying drawings.

Brief Description of the Drawings

[0039]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0040] Referring to FIGS. 1 and 2, which are a plan view of the inlet region of the rolling mill 1 to which the strip-shaped rolled material 2 is supplied from an upstream process such as a heating furnace, a casting machine or a rough stand to the forming section. The rolling mill 1 according to the present invention is a finishing train, which preferably includes a number of roll stands, among which the first roll stand 3 is implicitly illustrated. The rolled material 2 is, for example, a hot strip, and this hot strip passes through the shear 4 and the scale washer 5 in the rolling mill 1, for example, before being supplied to the first roll stand 3 in the rolling mill 1. In this case, the rolled material 2 in the form of a hot strip is supplied to the first unit of the rolling mill 1 in the form of a shear 4 formed as a drum shear via the roller table 6. The rolled material 2 passes through the rolling mill 1 from left to right in the figure. FIG. 1 shows the rolled material 2, and the head 7 (strip head) of the rolled material is present in the region of the first lateral guide means 8 on the roller table 6.

[0041] Immediately behind the first lateral guide means 8 in the conveying direction of the rolled material 2, a third lateral guide means 10 formed substantially corresponding to the first lateral guide means 8 is arranged. At an interval A1 from the first lateral guide means 8, a second lateral guide means 9 is arranged immediately before the first roll stand 3. In the illustrated embodiment, the first and third lateral guide means 8, 10 are arranged directly one behind the other with a small interval A2 of, for example, 1 m to 6 m, which is significantly smaller than the interval A1 of, for example, 6 m to 20 m between the third lateral guide means 10 and the second lateral guide means 9. The first lateral guide means 8 is arranged in front of the first roll stand 3 with a large interval, while the second lateral guide means 9 is arranged immediately before the roll stand 3. The first lateral guide means 8 and the third lateral guide means 10 are deviated from parallel by, for example, 1° to 30° and are formed in the form of a suitable funnel that tapers in the conveying direction. The angular position of the funnel can be set to be variable and different.

[0042] Between the third lateral guide means 10 and the second lateral guide means 9, in the conveying direction of the rolled material 2, first, the shear 4 is arranged, and immediately thereafter, the scale washer 5 is arranged. The arrangement of other configurations can also be considered within the scope of the present invention. For example, the first and third lateral guide means 8, 10 can be provided in front of a coil box and a shear arranged thereafter in the conveying direction. The distance A1 between the second lateral guide means 9 and the third lateral guide means 10 is relatively large so that the maximum lever arm can act on the rolled material 2 between these two contact points spaced apart from each other with the rolled material 2, thereby enabling lateral position adjustment and displacement of the rolled material in the conveying direction with respect to the target position to the ideal line or the center line 11 of the rolling mill 1 on the roller table 6. The respective actual alignment of the rolled material 2 is schematically indicated by the dashed line 12 in the figure.

[0043] As can be particularly seen from FIG. 3, the first, second, and third lateral guide means 8, 9, 10 each include two guide legs 13, and these guide legs are each pivotable by an adjustment cylinder 14 and displaceable laterally with respect to the center line 11 of the rolling mill. The adjustment cylinder 14 is preferably formed as a hydraulic cylinder supported by a corresponding abutment. Each guide leg 13 constitutes a guide surface oriented in the direction of the side edge of the rolled material 2, and in the case of the first and third lateral guide means 8, 10, a dot-shaped support portion in the form of a guide roller 15 follows on this guide surface. The guide legs 13 of the first and third lateral guide means 8, 10 are each oriented or adjusted in a funnel shape, so the first and third lateral guide means 8, 10 constitute a double funnel that causes centering at the inlet of the rolled material 2.

[0044] As shown in FIG. 1, the rolled material 2 arranged off-center on the roller table 6 first contacts the guide legs 13 of the first lateral guide means 8. In this case, the first lateral guide means 8 first satisfies the function of capturing the rolled material 2, which can be formed, for example, as a slab, a thin slab, or a rough strip.

[0045] The method includes the setting of a suitable funnel with a certain inclination angle, so that the rolled material 2 first contacts the first lateral guiding means 8 as gently as possible. Next, further centering is performed by the third lateral guiding means 10. Thereafter, the guide rollers 15 of the first and third lateral guiding means 8, 10 only contact the edge of the rolled material 2 at points. Therefore, the rolled material 2 is roughly centered and supplied to the shear 4 and the subsequent scale washer 5.

[0046] Subsequently, the rolled material head 7 reaches the guide area of the third lateral guiding means 10 formed according to the first lateral guiding means 8.

[0047] The second lateral guiding means 9 is arranged immediately in front of the roll stand 3 of the die 1 of the rolling mill 1. The second lateral guiding means 9 also includes two guide legs 13. In these guide legs, different from the case of the first and third lateral guiding means 8, 10, the guide rollers 15 are arranged upstream in the conveying direction of the rolled material 2, that is, on the inlet side of the guide formed by the guide legs 13. Upstream of the guide rollers of the second lateral guiding means 9, there is a funnel that can move together with the guide rollers 15 and ensures the entry of the rolled material head 7 between the guide rollers of the second lateral guiding means 9. The width of the opening between the guide legs 13 of the second lateral guiding means 9 is smaller than the width of the funnel opening of the first and third lateral guiding means 8, 10. Ideally, the guide legs 13 of the second lateral guiding means 9 are aligned parallel to each other. As shown in FIG. 4d, the guide rollers 15 cause the rolled material 2 to be held within the center line 11 of the rolling mill 1 throughout the entire rolling process even when the rolled material foot 16 of the rolled material 2 has already left the guide areas of the first and third lateral guiding means 8, 10. When the rolled material foot 16 of the rolled material 2 has already left the guide rollers 15 of the second lateral guiding means 9, the guide legs 13 can still hold the rolled material.

[0048] Figs. 4a) to 4c) show a schematic sequence of the rolled material entering the rolling mill 1, and Fig. 4d) shows a state where the rolled material foot portion 16 of the rolled material 2 still exists between the second side guide means 9 and the next portion of the rolled material already exists on the roller table 6 of the rolling mill 1.

[0049] In the case of the method according to the present invention, the rolling head portion 7 first reaches the funnel opening of the first side guide means 8. When the rolled material 2 is misaligned, the rolled material head portion 7 first contacts one of the guide legs 13 of the first side guide means 8 and captures the rolled material 2. Thereafter, the rolled material 2 reaches the inlet region of the third side guide means 10. By the third side guide means 10, the alignment of the rolled material 2 to the center is performed for the next process step, for example, the shearing by the shear 4 arranged downstream of the third side guide means 10.

[0050] Fig. 4b) shows the state of the rolled material 2 where the rolled material head portion 7 just reaches the inlet region of the second side guide means 9. At this position of the rolled material 2, since reliable guiding and alignment of the rolled material 2 are ensured by all the side guide means 8, 9, 10, the rolled material head portion 7 can be centrally supplied to the forming process by the first roll stand 3 and can be held at this position throughout the entire rolling process. Fig. 4d) shows the state of the rolled material 2 where the rolled material foot portion 16 still just exists in the guiding region by the second side guide means 9. Note that this application relates to the invention described in the claims, but may also include the following as other aspects. 1. A method for guiding and centering a metallic rolled material (2) in a rolling mill (1) having at least one unit arranged in a rolling line and at least one roll stand (3) for shaping the rolled material (2), the method including the use of lateral guide means (8, 9, 10) for applying a lateral force to the moving rolled material (2) at different locations in the rolling line, the method further including an inlet centering process of the rolled material (2) in front of a first unit of the rolling mill (1) and / or a first roll stand (3) by a first lateral guide means (8), and a position adjustment process of the rolled material (2) transverse to the rolling line by a second lateral guide means (9) downstream in the conveying direction of the rolled material (2), wherein the inlet centering process includes a funnel-shaped planar guide of the rolled material (2) and a point guide of the rolled material (2), characterized by the method. 2. For the inlet centering process of the rolled material (2), a third lateral guide means (10) is further used, characterized by the method according to 1 above. 3. The first lateral guide means (8) and the third lateral guide means (10) are arranged directly one behind the other downstream in the rolling direction with a relatively small first interval (A2), and the first lateral guide means (8) and the second lateral guide means (9) and / or the third lateral guide means (10) are arranged downstream in the rolling direction with a relatively large interval (A1) from each other, characterized by the method according to 2 above. 4. The lateral guide means (8, 9, 10) engage and disengage from the rolled material (2) with a controllable variable adjustment force, characterized by the method according to any one of 1 to 3 above. 5. Another funnel-shaped, planar and point guide of the rolled material (2) by the third lateral guide means (10) is provided, characterized by the method according to any one of 1 to 4 above. 6. The position adjustment of the rolled material (2) by the second lateral guide means (9) is performed immediately before the first roll stand (3) of the rolling mill (1), characterized by the method according to any one of 1 to 5 above. 7. The lateral guide means (8, 9, 10) are actively adjusted with respect to the rolled material (2) preferably with a contact force smaller than the plastic deformation ability of the rolled material (2), characterized by the method according to any one of 1 to 6 above. 8. The guide of the rolled material (2) includes, for adjusting the position of the rolled material (2) parallel to the rolling line (11), preferably being narrower than at least the guide of the entrance centering process, and more preferably being a guide of the rolled material (2) that is adjusted in contact with the rolled material, and the method according to any one of the above 1 to 7 is characterized thereby. 9. The first lateral guide means (8) is partially disengaged from the rolled material (2) by the second or third lateral guide means (9, 10) or at least one other lateral guide means after the first contact with the rolled material (2) and before the second contact with the rolled material (2), and the method according to any one of the above 1 to 8 is characterized thereby. 10. The alignment and position of the rolled material (2) with respect to the rolling line (11) are detected by a sensor, and the adjustment movement and / or adjustment force of the lateral guide means (8, 9, 10) are controlled depending on the position and / or alignment of the rolled material (2), or the position of the lateral guide means is set at a selectable interval with respect to the rolling line, and the method according to any one of the above 1 to 9 is characterized thereby. 11. An apparatus for guiding and centering a metallic rolled material (2) in a rolling mill (1), in particular for implementing the method according to any one of the above 1 to 10, wherein the rolling mill (1) includes at least one unit arranged in a rolling line (11) and at least one roll stand (3) for shaping the rolled material (2), and includes at least first and second lateral guide means (8, 9) arranged at different spaced-apart locations of the rolling line (11), and at least the first lateral guide means (8) constitutes an entrance centering device for the rolled material (2), and at least the second lateral guide means (9) is arranged in front of the first roll stand (3) and is provided for adjusting the position of the rolled material parallel and centered with respect to the rolling line. At least the first lateral guide means includes a planar guide for the rolled material and additionally a point guide for the rolled material, and the point guide is preferably formed as a roller-type lateral guide, and the apparatus is characterized thereby. 12. The first lateral guide means (8) and the second lateral guide means (9) are arranged at a large first interval A1 from each other, and the second lateral guide means is preferably arranged immediately before the first roll stand (3), and the apparatus according to the above 11 is characterized thereby. 13. The apparatus according to claim 11 or 12, characterized in that third lateral guide means (10) are provided. 14. The apparatus according to any one of claims 11 to 13, characterized in that the second lateral guide means (9) and / or the third lateral guide means (10) each comprise a planar guide for the rolled material (2) and additionally at least one point guide for the rolled material (2). 15. The apparatus according to any one of claims 11 to 13, characterized in that the second lateral guide means (9) and / or the third lateral guide means (10) each preferably comprise only a point guide for the rolled material (2) in the form of at least one roller-type lateral guide. 16. The apparatus according to any one of claims 11 to 15, characterized in that the planar guide is at least partially formed as a funnel-shaped guide. 17. The apparatus according to claim 16, characterized in that the roller-type lateral guide is arranged on the outlet side and / or the inlet side of the funnel-shaped guide. 18. The apparatus according to any one of claims 11 to 17, characterized in that the lateral guide means (8, 9, 10) are adjustable with a predetermined force on both sides of the rolled material (2), preferably at different angular positions.

Explanation of Symbols

[0051] 1 Rolling mill 2 Rolled material 3 Roll stand 4 Shear 5 Scale washer 6 Roller table 7 Head of the rolled material 8 First lateral guide means 9 Second lateral guide means 10 Third lateral guide means 11 Center line of the rolling mill 12 Solid line of the rolled material 13 guide legs 14 adjustment cylinder 15 guide rollers 16 rolled material foot part A1 large first interval between the first and second side guide means A2 small second interval between the first and third side guide means

Claims

1. A method for guiding and centering a metallic rolled material (2) in a rolling mill (1) having at least one unit arranged in a rolling line and at least one roll stand (3) for shaping the rolled material (2), the method comprising the use of lateral guide means (8, 9, 10) for applying lateral forces to the moving rolled material (2) at different locations in the rolling line, the method further comprising an inlet centering process of the rolled material (2) in front of the first unit of the rolling mill (1) and / or the first roll stand (3) by the first lateral guide means (8), and a position adjustment process of the rolled material (2) transverse to the rolling line by the second lateral guide means (9) downstream in the conveying direction of the rolled material (2), wherein the inlet centering process includes a funnel-shaped planar guide of the rolled material (2) and a point guide of the rolled material (2), and for the inlet centering process of the rolled material (2), a third lateral guide means (10) is further used, the lateral guide means (8, 9, 10) each having a planar guide of the rolled material and additionally a point guide of the rolled material, the point guide being formed as a roller-type lateral guide, the planar guide being formed substantially as a funnel-shaped guide, the lateral guide means (8, 9, 10) being actively adjusted with respect to the rolled material (2), the third lateral guide means (10) being arranged directly downstream in the rolling direction with a relatively small first interval (A2) with respect to the first lateral guide means (8), and the second lateral guide means (9) being arranged downstream in the rolling direction with a relatively large interval (A1) with respect to the first lateral guide means (8). A method characterized by that.

2. The method according to claim 1, characterized in that the lateral guide means (8, 9, 10) engage and disengage from the rolled material (2) with a controllable variable adjustment force.

3. The method according to claim 1 or 2, characterized in that another funnel-shaped, planar and point guide of the rolled material (2) by the third lateral guide means (10) is provided.

4. The method according to any one of claims 1 to 3, characterized in that the position adjustment of the rolled material (2) by the second lateral guide means (9) is performed immediately before the first roll stand (3) of the rolling mill (1).

5. The method according to any one of claims 1 to 4, characterized in that the lateral guiding means (8, 9, 10) are adjusted with respect to the rolled material (2) with a contact force smaller than the plastic deformation ability of the rolled material (2).

6. The method according to any one of claims 1 to 5, characterized in that the guiding of the rolled material (2) includes a guide of the rolled material (2) that is narrower than at least the guide of the inlet centering process or is adjusted in contact with the rolled material to position the rolled material (2) parallel to the rolling line (11).

7. The method according to any one of claims 1 to 6, characterized in that the first lateral guiding means (8) is partially disengaged from the rolled material (2) by the second or third lateral guiding means (9, 10) or at least one other lateral guiding means after the first contact with the rolled material (2) and before the second contact with the rolled material (2).

8. The method according to any one of claims 1 to 7, characterized in that the alignment and position of the rolled material (2) with respect to the rolling line (11) are detected by a sensor, and the adjustment movement and / or adjustment force of the lateral guiding means (8, 9, 10) are controlled depending on the position and / or alignment of the rolled material (2), or the position of the lateral guiding means is set at a selectable distance from the rolling line.

9. An apparatus for guiding and centering a metallic rolled material (2) in a rolling mill (1), in particular for carrying out the method according to any one of claims 1 to 8, wherein the rolling mill (1) includes at least one unit arranged in a rolling line (11) and at least one roll stand (3) for shaping the rolled material (2), and includes first, second and third lateral guiding means (8, 9, 10) arranged at different spaced locations of the rolling line (11), at least the first lateral guiding means (8) constituting an inlet centering device for the rolled material (2), and at least the second lateral guiding means (9) being arranged in front of the first roll stand (3) and provided for positioning the rolled material parallel and centered with respect to the rolling line. First, second, and third side guide means (8, 9, 10) each comprise a planar guide for the rolled material and additionally a point guide for the rolled material, the point guide being formed as a roller-type side guide, the planar guide being formed substantially as a funnel-shaped guide, the side guide means (8, 9, 10) being adjustable with a predetermined force on both sides of the rolled material (2), the third side guide means (10) being arranged directly downstream in the rolling direction with a relatively small first interval (A2) with respect to the first side guide means (8), and the second side guide means (9) being arranged downstream in the rolling direction with a relatively large interval (A1) with respect to the first side guide means (8). An apparatus characterized by the above.

10. The apparatus according to claim 9, characterized in that the second side guide means is arranged immediately before the first roll stand (3).

11. The apparatus according to claim 9 or 10, characterized in that the second side guide means (9) and / or the third side guide means (10) each comprise a planar guide for the rolled material (2) and additionally at least one point guide for the rolled material (2).

12. The apparatus according to any one of claims 9 to 11, characterized in that the planar guide is at least partially formed as a funnel-shaped guide.

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

14. The apparatus according to any one of claims 9 to 13, characterized in that the side guide means (8, 9, 10) are adjustable to different angular positions on both sides of the rolled material (2).

Images