Rolling stand and method for operating this rolling stand

Abstract

The invention relates to a rolling stand 20 for rolling stock, comprising a rolling stand frame 3 at a drive side AS; and a rolling stand frame 3 at an operating side BS, in which in both rolling stand frames the roll necks of the work rolls 1 are rotatably mounted in chocks 13; a screw down device 4 in both rolling stand frames 3 for applying a rolling force via the chocks 13 to the work rolls of the rolling stand 20; at least one measuring device 6 for generating a measuring signal, assigned to one of both rolling stand frames 3; and an evaluation device 8 for evaluating the measuring signal taking into account the rolling force exerted by the screw down device 4 on the work rolls. In order to better protect the measuring device 6 from contamination and corrosion and, as a result, to achieve more accurate measurement signals and control results, the roll stand according to the invention has in at least one frame support 3a, 3b of at least one of the roll stand frames 3 at least one bore 7; and the measuring device 6 is inserted into the bore 7 and is configured for detecting a deformation of the bore 7 upon the action of the rolling force and for generating the measurement signal representative of the detected deformation of the bore 7.

Description

Technical Field

[0001] The present invention relates to a rolling stand for rolling a rolled material and a method for operating this rolling stand. In particular, the present invention relates to the measurement of rolling force in a rolling stand.

Background Art

[0002] For this purpose, basically various solutions are well known in the prior art. Thus, Patent Document 1 discloses an apparatus and a method for measuring rolling force in a rolling stand using an ultrasonic transmitter-receiver device (Ultraschall-Sender-Empfaenger-Anordnung). By this apparatus, a length change in the strut of the rolling stand frame based on the applied rolling force is measured, and then this measured length change is converted into the rolling force to be determined.

[0003] Furthermore, Patent Document 2 discloses a sensor for measuring rolling force, wherein this sensor is assembled outside the frame strut of the rolling stand frame, and therefore, the length change of this frame strut under load, i.e., at the applied rolling force, is measured by the strain of a coil, and then the measured length change is converted into the rolling force to be determined.

[0004] This rolling force is used for a plurality of controls during the operation of the rolling stand, and therefore, it is desirable that this rolling force can be accurately measured even in a high dynamic state.

[0005] In rolling operations, however, inaccurate or unreliable rolling force measurements often occur. The causes of this may include, for example, frictional forces between the rolling stand frame and the chocks for the backup rolls within the rolling stand, or the introduction of non-uniform forces within traditional force measuring devices, such as due to corroded or deformed surfaces. These imprecise force measurements can, in such cases, lead to quality problems in the rolled material to be rolled, or to instability in the rolling process, for example, in the form of lateral movement of the ends of the rolled material.

[0006] In both of these patent documents, the measuring instruments are mounted on the outside of the rolling stand frame, and these instruments are therefore delivered without protection from harsh conditions in the surrounding environment of the rolling stand, such as contaminants and dust. This also results in a risk of some degree of inaccuracy in the measurement results. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] International Publication No. 2007 / 147766 A1 [Patent Document 2] Chinese Patent Application Publication No. 101695717, Specification A [Overview of the project] [Problems that the invention aims to solve]

[0008] The fundamental problem of the present invention is to provide a selective rolling stand for rolling a rolled material that enables accurate measurement of rolling force, as well as a selective method for operating the rolling stand. [Means for solving the problem]

[0009] This problem is solved with respect to the rolling stand by the subject of claim 1. Accordingly, the rolling stand according to the present invention is At least one perforation is formed in at least one frame support of at least one of the rolling stand frames. The measuring instrument is inserted into the hole, and It is formed for the purpose of detecting the deformation of the perforation during the application of the rolling force, and for generating the measurement signal that represents the detected deformation of the perforation. It is characterized by the following. [Effects of the Invention]

[0010] The deformation of the perforations detected by the measuring instrument essentially represents the support forces within each rolling stand frame. These support forces, however, are directly proportional to the rolling force acting on the rolls. These support forces are converted to the actual rolling force using an evaluation device.

[0011] It is fundamental that each rolling stand has two rolling stand frames; that is, one rolling stand frame on the drive side and one rolling stand frame on the operating side. Each rolling stand frame typically has two frame supports. The perforations according to the present invention are formed within each of the frame supports.

[0012] From this, we can approximately infer the following: In other words, The measuring instruments 6 inside the boreholes 7 each measure the frame support force, or simply the support force. 2 × support force = frame force; 2 × frame force = rolling force of the rolling stand

[0013] Within the borehole, the measuring instrument is advantageously protected, in particular, from contaminants in the surrounding environment of the rolling stand and from corrosion, so that the measuring signal of the instrument is not tampered with as a result. Rather, the measurement signals from the measuring instrument detected in accordance with this invention provide a highly reliable basis for the evaluation device to calculate the rolling force to be sought.

[0014] According to the first embodiment, the measuring instrument is inserted into the borehole under preload. The preload of the measuring instrument must be large enough that it is still in contact with the borehole even under the maximum rolling force. This preload, in that case, defines the operating point for the measuring instrument. The deformation of the bore can, in that case, be measured in the form of a change in the preload around the aforementioned operating point. Depending on the configuration of the measuring instrument, changes in preload compared to the operating point can be detected in the form of changes in the force acting on the measuring instrument within the borehole, or in the form of changes in the mechanical load acting on the measuring instrument within the borehole. Selectively, changes in preload can be detected in the form of changes in compressive displacement, to the extent that the measuring instrument within the bore is compressed relative to its relaxed state or to its compression at the operating point. Suitable measuring instruments for insertion into boreholes under preloading include, for example, piezoelectric sensors or resistance wire strain gauges.

[0015] Selectively or additionally, other measuring instruments may be inserted into the borehole without preloading. For this purpose, for example, an inductive displacement detector is suitable, which detects deformation caused by the rolling force of drilling by a change in voltage induced within the inductive displacement detector, or A laser-based displacement detector is suitable, and this laser-based displacement detector is configured to detect the deformation of the drilling under a rolling load, for example, by evaluating the required time difference in the optical signal output from the laser-based displacement detector.

[0016] To compare the frame forces acting on the drive and operating sides of the rolling stand, In each of the rolling stand frames of both rolling stand frames, advantageously, in each of the four support columns of both rolling stand frames, It is advantageous if each has at least one measuring instrument and at least one perforation formed in each. Except in cases of special requirements, it is generally advantageous when the frame forces on the operating and driving sides are of the same magnitude.

[0017] The concept of "drive side" refers to the side of a rolling stand where the drive mechanism for the rolls of that rolling stand is located. The operating side is located opposite the drive side in the axial direction of the rolls and is freely accessible to operators, for example, for roll changes.

[0018] The arrangement of multiple measuring instruments within the borehole offers the advantage of allowing for overlapping measurements, which improves the accuracy of the calculated rolling force. Multiple measuring instruments inserted into a borehole can be based on the same or different physical principles. Incorporating measuring instruments based on different physical principles is a further measure to improve measurement accuracy.

[0019] Basically, the deformation of the drilling within the frame columns of the rolling stand frame, on the operating and driving sides of the rolling stand, and / or on the entry and exit sides of the rolling stand frame, can be measured at the respective heights of the rolling stand frame columns. Drilling at the height of the horizontal rolling line, and attaching measuring instruments located within these drillings, however, offers the advantage that the force to be measured there is not affected by the frictional force between the chock and the frame support. The perforations should, advantageously, be positioned perpendicular to the rolling line, within a range of 200 mm above to 200 mm below the rolling line.

[0020] The incorporation of measuring instruments at the same height on all the support columns of the rolling stand frame in which the rolling stand is involved improves the comparability of the deformations measured within individual frames, because these deformations at the same height on the frame columns should be the same or at least similar.

[0021] If each of the perforations for the measuring instrument is formed in a plane perpendicular to the rolling force applied by the reduction device, that is, in a horizontal plane within the support columns of the rolling stand frame, this provides the advantage that the deformation to be detected by the perforation acts, at least fundamentally, similarly perpendicular to the measuring instrument. This is advantageous because it does not depend on whether the perforation is formed in the rolling direction, or perpendicular to this rolling direction, or at an appropriate acute angle to this rolling direction, within the frame support columns of the rolling stand frame. In a rolling force acting vertically, the horizontal alignment of the perforations prevents the deformation of these perforations from acting on the measuring instrument at an inclined angle, which advantageously eliminates the need for coordinate transformation of the resulting measurement signal.

[0022] Each of them enters the frame within the frame support on the entry side. beside The arrangement of perforations for measuring instruments within each rolling stand frame, within the frame support on the running side and within the running side of the rolling stand frame, The advantage is that the frame force of each rolling stand frame can be calculated by simply adding up the support forces of both columns, which are measured by a measuring instrument.

[0023] The support force detected according to the present invention can be used for strip thickness control. For this purpose, the support force detected within the frame support of the rolling stand frame on the entry and exit sides is first and foremost integrated into the frame force of the rolling stand frame. This is done separately for the rolling stand frame on the entry and operation sides. The resulting drive and operating frame forces are added to the rolling force of the rolling stand. This rolling force is then converted into the actual thickness for the rolled material at the exit side of the rolling stand. The actual thickness calculated in this way is then adjusted to a predetermined target thickness for the rolled material, within the range of strip thickness control. By outputting a position adjustment signal appropriately modified for the reduction device, Similarly, these are output to and advantageously controlled on both the drive and operating sides, particularly to each of the pressure adjustment cylinders. To more precisely define the results of strip thickness control, additional frame force measuring devices are provided within each of the rolling stand frames of both rolling stand frames, for example, below the chock of the lower backup roll of the rolling stand, for direct measurement of the frame forces within both rolling stand frames of the rolling stand. The evaluation device described above is designed to calculate the rolling force, in that case, even with additional consideration of the additionally measured frame force.

[0024] Additionally, a position control device may be provided for controlling the position adjustment signal output to the reduction device to the target position represented by the position adjustment signal output from the strip thickness control device.

[0025] The advantages of the rolling stand according to the present invention, as previously mentioned, are equally valuable for the solution according to this method to the problem of the invention according to claim 14.

[0026] Further advantageous embodiments of a rolling stand according to the present invention and a method according to the present invention for operating the rolling stand are subject to the dependent claims.

[0027] Four figures are attached to the specification. [Brief explanation of the drawing]

[0028] [Figure 1] The following are individual illustrations of a rolling stand and a rolling stand frame belonging thereto, relating to a first embodiment of the present invention concerning the alignment of perforations for a measuring instrument. [Figure 2] Figure 1 shows a rolling stand and individual rolling stand frames, similar to Figure 1, but relating to a second embodiment for aligning drilling according to the present invention. [Figure 3] This is a diagram of individual rolling stand frames relating to a first embodiment for controlling strip thickness. [Figure 4] Figure 3 shows a diagram of an individual rolling stand frame with regard to selective strip thickness control. [Modes for carrying out the invention]

[0029] The present invention will be described in detail below in relation to the above-mentioned figures in the form of embodiments. In all figures, the same technical elements are indicated by the same reference numerals.

[0030] Figure 1 shows a rolling stand 20 according to the present invention for rolling a rolled material, in the right-hand view of the rolling stand. The rolling stand 20 consists of a rolling stand frame 3 on the drive side AS and a rolling stand frame 3 on the operating side BS, in which both of these rolling stand frames are connected to each other via a lateral head. Within both rolling stand frames, the roll necks of the backup roll 2 and the work roll 1 are rotatably supported within chocks. These chocks can be seen in the left-hand view of Figure 1, where they are indicated by reference numeral 13.

[0031] A reduction device 4 for applying frame force to work roll 1 via chock 13 and backup roll 2 is shown. The sum of the frame force of the driving side rolling stand frame and the operating side frame force is the so-called rolling force of the rolling stand.

[0032] In the right-hand diagram of Figure 1, perforations 7 according to the present invention can be recognized, and one measuring instrument 6 is inserted into each of these perforations 7. Each measuring instrument 6 is formed to generate one measurement signal, which represents the deformation of the perforations within the frame supports 3a and 3b of each rolling stand frame 3 in accordance with the frame force or rolling force applied to each by the reduction device 4.

[0033] As can be seen from the left-hand diagram in Figure 1, the reduction device 4 operates in the vertical direction. In order to enable the measuring instrument 6 to detect the maximum effect of the change in length of the rolling stand frame, conditioned by the rolling force, and the resulting deformation of the perforations 7, it is advantageous when these perforations are formed in a plane perpendicular to the acting rolling force, that is, in a horizontal plane as shown in the embodiment in the figure.

[0034] In the first embodiment shown in Figure 1, the perforations 7 are positioned horizontally within this horizontal plane and are oriented perpendicular to the longitudinal axes of the rolls 1 and 2, i.e., perpendicular to the rolling direction (see the figure on the right). Within each of the rolling stand frames 3 of both rolling stand frames, and within each of the frame supports 3a and 3b of one of the rolling stand frames, one measuring instrument 6 is positioned within the hole 7; and, In general, it can be seen that, in the rolling stand shown in Figure 1, four measuring instruments 6 are positioned for measuring the deformation of the holes, and that each of these measuring instruments is inserted into one of these holes.

[0035] The measuring instrument 6 shown in Figure 1 is positioned within the perforations 7, and each of these perforations is mounted at the same height, and at the height of the rolling roll gap defined by the work roll 1. This also applies to the special case shown in Figure 1, in which the work rolls exceptionally do not define any rolling roll gap; and the perforation 7 and measuring instrument 6 are positioned, however, within the rolling stand frame at a height at which both work rolls 1 are in contact with each other.

[0036] The diagram on the left shows one of these rolling stand frames 3, and this rolling stand frame is configured similarly for the drive side AS and the operating side BS, respectively.

[0037] Figure 2 differs from Figure 1 only in that the perforations 7 for the measuring instrument 6 are aligned and extend in the rolling direction. In the case of the second embodiment shown in Figure 2, regarding the alignment of the perforations 7, it can be recognized that these perforations are located in a single horizontal plane, which is oriented perpendicular to the acting rolling force, and that the measuring instrument 6 is positioned inside the rolling stand frame 3 at a height where both work rolls 1 are in contact.

[0038] Figure 3 shows a first embodiment of strip thickness control according to the invention for controlling the actual thickness h REF of the rolled material to a pre - given target thickness (indicated by reference numeral h in Figure 3). ACT The strip thickness control according to the invention is intended for the measurement of the support force F Pf by four preferably such measuring devices 6 according to the invention in the perforations 7 belonging to those measuring devices at the entry side E and the exit side A of the rolling stand frame 3 on the drive side AS and the operating side BS (the latter not shown). Then, the actual rolling force F WACT is calculated using the evaluation device 8 as the sum of the four measured support forces F Pf : namely, F PfAS and F PfBS . If the support force F Pf can be measured in only two of the four supports, these two support forces F Pf are added and their sum is multiplied by 2 in order to calculate at least approximately the actual rolling force. From the actual rolling force F WACT , then, taking into account the actual cylinder positions s ACTAS , s ACTBS in the screwdown devices 4 in both rolling stand frames 3 on the drive side AS and the operating side BS, the actual thickness h ACT of the rolled material at the exit of the rolling stand is calculated using the conversion device 9 as follows:

[0039] The current actual strip thickness h ACT in the roll gap is from the sum of the calibration positions s 0AS , s 0BS , subtracting the sum of the cylinder positions s ACTAS , s ACTBS of the screwdown devices 4 on the drive side AS and the operating side BS respectively, and the elongation g ATC of the rolling stand (F WACTThe calculation is performed by subtracting ).

[0040] h ACT =(s 0AS +s 0BS ) / 2-(s ACTAS +s ACTBS ) / 2-g ATC (F WACT ) Here, h ACT Actual thickness of rolled material s ACTAS , s ACTBS Actual position of the pressure reducing device on the drive and operating sides. s 0AS , s 0BS Calibration position of the reduction device during calibration by calibration rolling force on the drive side and operating side. F WACT Actual rolling force g ATC Actual extension of the rolling stand

[0041] The specific strip thickness control device 10 then calculates the difference between the target thickness and the actual thickness of the rolled material as a control deviation for the thickness of the rolled material, based on the target thickness h described above. REF However, the actual thickness h of the rolled material was calculated using the method described above. ACT The intention is for them to be compared sequentially. Based on this control deviation, the strip thickness control device 10 then issues appropriate position adjustment signals s for the reduction device 4 of the rolling stand frame 3 at the drive side AS and the operating side BS. REFAS , s REFBS Calculate.

[0042] In order to accurately ensure the adjustment to a suitable position predetermined by the strip thickness control device 10 for the reduction device 4, it is advantageous to monitor and ensure this position adjustment using a position control device.

[0043] Finally, Figure 4 shows a second embodiment of the strip thickness control shown in Figure 3. The only difference from the strip thickness control shown in Figure 3 is that an additional frame force measuring device 5 is provided, for example, below the chock 13 of the lower backup roll 2, in at least one of the rolling stand frames, and advantageously, in the operating rolling stand frame as well as in the driving rolling stand frame. Similarly, the necessary evaluation device 8, as shown in Figure 3, is also required in that case, and the actual rolling force F WACT Advantageously, the frame force F measured by the force measuring device 5 on both the drive side and the operating side. StaenderAS F StaenderBS It is designed to perform calculations more accurately, taking into account the additional considerations of the following factors. This means, for example, that the frame force calculated from the measured support force is the same as the directly measured frame force F on the drive side and the operating side. StaenderAS F StaenderBS This can be done by averaging the values ​​for further calculation of the rolling force. The thickness control to be achieved for the rolled material at the exit of the rolling stand is thus further refined or defined with greater precision.

[0044] The method for operating the rolling stand 20 is as follows: Applying rolling force to the work rolls of a rolling stand via chocks for rolling the rolled material. Generation of measurement signals, and, The actual rolling force F acting on the work roll WACT Considering this, the evaluation of this measurement signal, It has the following steps. For this purpose, at least one perforation 7 is formed within at least one frame support of at least one rolling stand frame 3, and the deformation of this perforation 7 during the application of rolling force is detected using a measuring instrument. The measurement signal represents the detected deformation of the perforation 7.

[0045] The measuring instrument 6 can be a piezoelectric sensor or a resistance wire strain gauge, and is advantageously inserted into the borehole 7 with a preload. The deformation of the borehole 7 is detected in the form of a change in the preload, and this preload indicates that the measuring instrument 6 has been inserted into the borehole 7. Changes in preload manifest as changes in force or stress acting on the measuring instrument within the borehole 7, or as changes in compressive displacement. of This is detected by shape, and by this amount of compression displacement, the measuring instrument 6 within the borehole 7 is compressed relative to its relaxed state or to the compression at the operating point of the measuring instrument 6.

[0046] Selectively, the measuring instrument 6 can be formed as a laser-based displacement detector and can be inserted into the borehole 7 without preloading. In this case, deformation of the borehole is detected in the form of a measured displacement difference / time difference optical signal, which is emitted from the laser-based displacement detector within the borehole.

[0047] More selectively, the measuring instrument 6 can be formed as an inductive displacement detector and can be inserted into the borehole 7 without preloading. In this case, deformation of the borehole is detected in the form of a voltage induced in the inductive displacement detector as a result of the deformation.

[0048] The target thickness h is given in advance. REF The actual thickness h of the rolled material ACT The control is performed by outputting a position adjustment signal that is appropriately varied to the reduction device, particularly the reduction adjustment cylinder. At that time, the actual thickness h of the rolled material ACT The actual rolling force F detected by the evaluation device 8 is... WACT It is calculated from.

[0049] The position of the reduction device 4, in particular the reduction adjustment cylinder, is advantageously controlled by the position adjustment signal s. REF It is controlled to the target position represented by [the symbol / symbol].

[0050] Finally, the strip thickness control is due to the rolling stand frame 3 on the operating side, Operation For the rolling stand frame 3 on the side, this may be done separately. In that case, it is recommended that both strip thickness control devices 10 be synchronized to the same target thickness for the rolled material. While this application relates to the invention described in the claims, it may also encompass the following other embodiments. 1. A rolling stand (20) for rolling a rolled material, wherein this rolling stand is The rolling stand frame (3) is located on the drive side (AS); and the rolling stand frame (3) is located on the operating side (BS), wherein the roll necks of the work rolls (1) are rotatably supported within the chocks (13) within both of the rolling stand frames; The rolling stand (20) has reduction devices (4) within both rolling stand frames (3) for applying rolling force to the work rolls via the chocks (13); It has at least one measuring instrument (6) for generating a measurement signal, which is assigned to one of the rolling stand frames (3) of both rolling stand frames; and, The device includes an evaluation device (8) for evaluating the measurement signal, taking into account the rolling force applied to the work roll by the reduction device (4); In the above rolling stand, At least one perforation (7) is formed in at least one frame support (3a, 3b) of at least one of the rolling stand frames (3); and, The measuring instrument (6) is inserted into the perforation (7), and It is formed for the purpose of detecting the deformation of the perforation (7) during the application of the rolling force, and for generating the measurement signal that represents the detected deformation of the perforation (7). A rolling stand (20) characterized by the following. 2. The measuring instrument (6) is inserted into the hole (7) under preload; The measuring instrument (6) is formed to detect the deformation of the perforation (7) in the form of a change in the preload of the measuring instrument; and, The measuring instrument (6) is formed to detect changes in the preload of the measuring instrument in the form of changes in force or mechanical stress acting on the measuring instrument within the bore (7), or in the form of changes in compressive displacement. This compressive displacement indicates that the measuring instrument (6) inside the borehole (7) is compressed compared to its relaxed state. The rolling stand (20) described in item 1 above, characterized by the above. 3. The rolling stand (20) according to paragraph 2, characterized in that the measuring instrument (6) is formed in the form of a piezoelectric sensor or a resistance wire strain gauge. 4. The measuring instrument (6) is inserted into the hole (7) without preloading; and, The measuring instrument (6) is formed in the form of an inductive or laser-based displacement detector for detecting the deformation of the perforation. The rolling stand (20) described in item 1 above, characterized by the above. 5. In each of the four frame supports (3a, 3b) of both rolling stand frames (3), at least one perforation (7) is formed; and, Each of the rolling stand frames (3) has at least one measuring instrument (6) inserted into the perforations (7) within each rolling stand frame. A rolling stand (20) as described in any one of the above 1 to 4, characterized by the above. 6. A rolling stand (20) according to any one of claims 1 to 5, characterized in that a plurality of measuring instruments (6) are inserted into at least one of the perforations (7) within at least one of the frame supports (3a, 3b). 7. The perforation (7) and the measuring instrument (6) are, Within the frame support columns (3a, 3b) of both rolling stand frames (3) on the operating side and / or driving side (BS, AS) of the rolling stand frame, and, On the entry side and / or exit side (E, A) of one of the rolling stand frames (3), A rolling stand (20) according to any one of items 1 to 6 above, characterized in that it is fitted with a rolling stand. 8. The holes (7) for the measuring instrument (6) are each mounted within the frame supports (3a, 3b) at the same height, preferably at the height of the rolling roll gap defined by the work roll (1). The rolling stand (20) described in item 7 above, characterized in that it is a rolling stand (20). 9. The perforation (7) for the measuring instrument (6) is Each of the rolling forces applied by the reduction device (4) is preferably in a plane perpendicular to the vertical direction. Advantageously, in the rolling direction, or perpendicular to the rolling direction, and / or at an appropriate acute angle to the rolling direction, A rolling stand (20) according to any one of the above 1 to 8, characterized in that it is formed within the rolling stand frame (3). 10. A position adjustment signal (s) that is appropriately varied to the reduction device (4), preferably on the drive side and the operating side, and especially to the reduction adjustment cylinder of the reduction device. REF The output of ) determines the predetermined target thickness (h REF At least one strip thickness control device (10) is provided for controlling the actual thickness of the rolled material; and, The actual rolling force (F) detected by the evaluation device (8) WACT ) from the actual thickness (h ACT A conversion device (9) is provided for the calculation of ) A rolling stand (20) as described in any one of the above 7 to 9, characterized by the above. 11. Advantageously, an additional frame force measuring device (5) is provided for direct measurement of the frame force within the rolling stand (20) on the drive side and the operating side; and, The evaluation device (8) is formed in order to calculate the actual rolling force on the rolled material, even taking into account the additionally measured frame force. A rolling stand (20) as described in item 10 above, characterized by the above. 12. Advantageously, on the driving side and the operating side, A position control device (12) is provided for controlling the position of the reduction device (4), particularly the position of the reduction adjustment cylinder, to a target position represented by a position adjustment signal output from the strip thickness control device (10). A rolling stand (20) according to the above 10 or 11, characterized in that it is a rolling stand (20). 13. A strip thickness control device (10) for the rolling stand frame (3) on the operating side (BS), and yet another strip thickness control device for the rolling stand frame (3) on the driving side (AS); and, Both of the strip thickness control devices (10) are synchronized to the same target thickness for the rolled material. A rolling stand (20) as described in any one of the above 10 to 12, characterized by the above. 14. A method for operating a rolling stand (20) as described in any one of items 1 to 13 above, wherein the method comprises the following steps: namely, Applying rolling force to the work roll (1) of the rolling stand (20) for rolling the rolled material via the chock (13); Generation of measurement signals; and, The actual rolling force (F) acting on the work roll WACT Evaluation of the measurement signal, taking into consideration the above; In the method having steps, At least one perforation (7) is formed within the frame support columns (3a, 3b) of the rolling stand frame (3); The deformation of the perforation (7) during the application of the rolling force is detected; and, The measurement signal represents the detected deformation of the perforation (7), A method characterized by the following. 15. The measuring instrument (6) is a piezoelectric sensor or a resistance wire strain gauge. The measuring instrument is preferably inserted into the hole by preloading; The deformation of the perforation (7) is detected in the form of a change in preload, and this preload indicates that the measuring instrument (6) has been inserted into the perforation; and, The change in the preload is detected in the form of a change in force or stress acting on the measuring instrument within the borehole (7), or in the form of a change in compressive displacement. This compressive displacement is such that the measuring instrument (6) within the borehole (7) is compressed relative to the relaxed state of the measuring instrument, or relative to the compression at the operating point of the measuring instrument (6) for the force, stress, or compressive displacement. The method described in item 14 above, characterized by the above. 16. The measuring instrument (6) is formed in the form of a laser-based displacement detector, and, It is inserted into the perforation (7) without preloading; and, The deformation of the drilling is detected in the form of a measured displacement difference / time difference of optical signals, and these optical signals are emitted from the laser-based displacement detector within the drilling. The method described in item 14 above, characterized by the above. 17. The measuring instrument (6) is formed as an inductive displacement detector and is inserted into the hole (7) without preloading; and, The deformation of the perforation is detected in the form of a voltage induced in an inductive displacement detector associated with the deformation. The method described in 14 above, characterized by the features described above. 18. A position adjustment signal (s) that is appropriately varied for the reduction device, particularly the reduction adjustment cylinder. REF ) output, The target thickness (h) is given in advance. REF The actual thickness (h) of the rolled material to ) ACT ) control; and, The actual rolling force (F) detected by the evaluation device (8) WACT ) from the actual thickness (h ACT ) calculation, A method according to any one of the above 14 to 17, characterized by the above. 19. The actual rolling force (F WACT )but, The column force (F) detected by the measuring instrument (6) within the frame columns (3a, 3b) of both the rolling stand frame (3) on the operating side and / or the driving side (BS, AS) of the rolling stand, and on the entry side and / or exit side (E, A) of one of the rolling stand frames (3) Pf )from, If four support forces are detected, these support forces are added to the actual rolling force; or, if only two support forces are detected, these support forces are added together and this sum is multiplied by 2. The method according to any one of the above 14 to 18, characterized by detection. 20. The frame force within the rolling stand frame shall be measured directly, in addition; and, The actual rolling force (F) of the rolled material WACT ) and the actual thickness (h ACT ) and, The calculation is also performed with additional consideration of the frame forces that have been additionally measured. The method described in 18 or 19 above, characterized by the above. 21. The position adjustment signal (s REF Control of the position of the reduction device (4), particularly the position of the reduction adjustment cylinder, to the target position represented by ). The method described in 18, 19, or 20 above, characterized by the above. 22. The strip thickness control is performed for the operating side of the rolling stand frame (3) and for the driving side of the rolling stand frame (3); and, Both of the strip thickness control devices (10) are synchronized to the same target thickness for the rolled material. A method according to any one of the above 18 to 21, characterized by the above. [Explanation of Symbols]

[0051] 1 Work Role 2. Backup Role 3. Rolling stand frame 3a Frame support 3b Frame support 4. Pressure reduction device 5 Force measuring device 6 Measuring instruments 7 perforation 8. Evaluation device 9 Conversion device 10 Strip Thickness Control Device 12 Position control device 13 Chock 20 Rolling Stands AS Rolling Stand Frame Drive Side Operating side of BS rolling stand frame E Entry side A Running side h REF Target thickness h ACT Actual thickness F WACT Actual rolling force s ACTAS The actual position of the pressure reduction device, particularly the pressure adjustment cylinder of this pressure reduction device, on the drive or operating side. s ACTBS The actual position of the pressure reduction device, particularly the pressure adjustment cylinder of this pressure reduction device, on the drive or operating side. s REFAS The target position of the reduction device, particularly the reduction adjustment cylinder of the reduction device, on the drive side or the operating side. s REFBS The target position of the reduction device, particularly the reduction adjustment cylinder of the reduction device, on the drive side or the operating side. F Pf Support force F PfAS Support force on the drive side F PfBS Support force on the operating side F StaenderAS Frame force directly measured on the drive side F StaenderBS Frame force directly measured on the operating side

Claims

1. A rolling stand (20) for rolling a rolled material, wherein this rolling stand is The rolling stand frame (3) is located on the drive side (AS); and the rolling stand frame (3) is located on the operating side (BS), wherein the roll necks of the work rolls (1) are rotatably supported within the chocks (13) within both of the rolling stand frames; The rolling stand (20) has reduction devices (4) within both rolling stand frames (3) for applying rolling force to the work rolls via the chocks (13); It has at least one measuring instrument (6) for generating a measurement signal, which is assigned to one of the rolling stand frames (3) of both rolling stand frames; and, The device includes an evaluation device (8) for evaluating the measurement signal, taking into account the rolling force applied to the work roll by the reduction device (4); In the above rolling stand, At least one perforation (7) is formed in at least one frame support (3a, 3b) of at least one of the rolling stand frames (3); and, The measuring instrument (6) is inserted into the perforation (7), and It is formed for the purpose of detecting the deformation of the perforation (7) during the application of the rolling force, and for generating the measurement signal that represents the detected deformation of the perforation (7). A rolling stand (20) characterized by the following.

2. The measuring instrument (6) is inserted into the hole (7) under preload; The measuring instrument (6) is formed to detect the deformation of the perforation (7) in the form of a change in the preload of the measuring instrument; and, The measuring instrument (6) is formed to detect changes in the preload of the measuring instrument in the form of changes in force or mechanical stress acting on the measuring instrument within the bore (7), or in the form of changes in compressive displacement. This compressive displacement indicates that the measuring instrument (6) inside the borehole (7) is compressed compared to its relaxed state. A rolling stand (20) according to claim 1, characterized by the above.

3. The rolling stand (20) according to claim 2 is characterized in that the measuring instrument (6) is formed in the form of a piezoelectric sensor or a resistance wire strain gauge.

4. The measuring instrument (6) is inserted into the hole (7) without preloading; and the measuring instrument (6) is formed in the form of an inductive or laser-based displacement detector for detecting the deformation of the hole. A rolling stand (20) according to claim 1, characterized by the above.

5. In each of the four frame supports (3a, 3b) of both rolling stand frames (3), at least one perforation (7) is formed within each frame support; and, Each of the rolling stand frames (3) has at least one measuring instrument (6) inserted into the perforations (7) within each rolling stand frame. A rolling stand (20) according to claim 1, characterized by the above.

6. The rolling stand (20) according to claim 1, characterized in that a plurality of measuring instruments (6) are inserted into at least one of the perforations (7) within at least one of the frame supports (3a, 3b).

7. The perforation (7) and the measuring instrument (6) are, Within the frame support columns (3a, 3b) of both rolling stand frames (3) on the operating side and / or driving side (BS, AS) of the rolling stand frame, and, On the entry side and / or exit side (E, A) of one of the rolling stand frames (3), The rolling stand (20) according to claim 1, characterized in that it is attached.

8. The holes (7) for the measuring instrument (6) are each mounted within the frame supports (3a, 3b) at the same height, or at the height of the rolling roll gap defined by the work roll (1). The rolling stand (20) according to feature 7.

9. The perforation (7) for the measuring instrument (6) is In each case, the rolling force applied by the reduction device (4) is in a plane perpendicular to the vertical direction, In the rolling direction, or perpendicular to the rolling direction, and / or at an appropriate acute angle to the rolling direction, The rolling stand (20) according to claim 1, characterized in that it is formed within the rolling stand frame (3).

10. On the drive side and the operating side, A position adjustment signal (s) is appropriately changed for the reduction device (4), that is, for the reduction adjustment cylinder of the reduction device. ＲＥＦ The output of ) determines the predetermined target thickness (h ＲＥＦ At least one strip thickness control device (10) is provided for controlling the actual thickness of the rolled material; and, The actual rolling force (F) detected by the evaluation device (8) ＷＡＣＴ ) from the actual thickness (h) of the rolled material ＡＣＴ The rolling stand (20) according to claim 7, characterized in that a conversion device (9) for calculating ) is provided.

11. On the drive side and the operating side, An additional frame force measuring device (5) is provided for the direct measurement of frame force within the rolling stand (20); and, The evaluation device (8) is formed in order to calculate the actual rolling force on the rolled material, even taking into account the additionally measured frame force. A rolling stand (20) according to claim 10, characterized by the above.

12. On the drive side and the operating side, A position control device (12) is provided for controlling the position of the reduction device (4), i.e., the position of the reduction adjustment cylinder, relative to a target position represented by a position adjustment signal output from the strip thickness control device (10). The rolling stand (20) according to claim 10.

13. A strip thickness control device (10) for the rolling stand frame (3) on the operating side (BS) and another strip thickness control device for the rolling stand frame (3) on the driving side (AS) are provided; and, Both of the strip thickness control devices (10) are synchronized to the same target thickness for the rolled material. A rolling stand (20) according to claim 10, characterized by the above.

14. A method for operating a rolling stand (20) according to any one of claims 1 to 13, wherein the method comprises the following steps: namely, Applying rolling force to the work roll (1) of the rolling stand (20) for rolling the rolled material via the chock (13); Generation of measurement signals; and, The actual rolling force (F) acting on the work roll ＷＡＣＴ Evaluation of the measurement signal, taking into consideration the following: In the method having steps, At least one perforation (7) is formed within the frame support columns (3a, 3b) of the rolling stand frame (3); The deformation of the perforation (7) during the application of the rolling force is detected; and, The measurement signal represents the detected deformation of the perforation (7). A method characterized by the following.

15. The measuring instrument (6) is a piezoelectric sensor or a resistance wire strain gauge, and the measuring instrument is inserted into the borehole by preloading; The deformation of the perforation (7) is detected in the form of a change in preload, and this preload indicates that the measuring instrument (6) has been inserted into the perforation; and, The change in the preload is detected in the form of a change in force or stress acting on the measuring instrument within the borehole (7), or in the form of a change in compressive displacement. This compressive displacement is such that the measuring instrument (6) within the borehole (7) is compressed relative to the relaxed state of the measuring instrument, or relative to the compression at the operating point of the measuring instrument (6) for the force, stress, or compressive displacement. The method according to claim 14, characterized by the above.

16. The measuring instrument (6) is formed in the form of a laser-based displacement detector, and To be inserted into the perforation (7) without preloading; and, The deformation of the drilling is detected in the form of a measured displacement difference / time difference of optical signals, and these optical signals are emitted from the laser-based displacement detector within the drilling. The method according to claim 14, characterized by the above.

17. The measuring instrument (6) is formed as an inductive displacement detector and is inserted into the hole (7) without preloading; and, The deformation of the perforation is detected in the form of a voltage induced in an inductive displacement detector associated with the deformation. The method according to feature 14.

18. A position adjustment signal (s) that is appropriately changed for the reduction device. ＲＥＦ ) output, The target thickness (h) given in advance ＲＥＦ The actual thickness (h) of the rolled material to ) ＡＣＴ ) control; and, Calculation of the actual thickness (h ＷＡＣＴ ) of the rolled material from the actual rolling force (F ＡＣＴ ) detected by the evaluation device (8) The method according to claim 14, characterized by the above.

19. The actual rolling force (F ＷＡＣＴ )but, The column force (F) detected by the measuring instrument (6) within the frame columns (3a, 3b) of both the rolling stand frame (3) on the operating side and / or the driving side (BS, AS) of the rolling stand, and on the entry side and / or exit side (E, A) of one of the rolling stand frames (3) Ｐｆ If four support forces are detected, these support forces are added to the actual rolling force; or, if only two support forces are detected, these support forces are added together, and this sum is multiplied by 2. The method according to 14, characterized in that it is detected.

20. The frame forces within the rolling stand frame are to be measured directly, in addition; and, The actual rolling force (F) of the rolled material ＷＡＣＴ ) and the actual thickness (h ＡＣＴ ) and, The calculation also takes into account additionally measured frame forces. The method according to claim 18, characterized by the above.

21. The position adjustment signal (s ＲＥＦ Control of the position of the reduction device (4) to the target position represented by ), The method according to claim 18, characterized by the above.

22. Strip thickness control is performed for the rolling stand frame (3) on the operating side and for the rolling stand frame (3) on the driving side; and both strip thickness control devices (10) are synchronized to the same target thickness for the rolled material. The method according to claim 18, characterized by the above.

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