JP4644047B2 - Meander detection device and method - Google Patents

Description

  The present invention relates to a meandering detection apparatus and method.

  The meandering detection device is installed in various places on the continuous rolling line and detects meandering of the rolled material being conveyed. In the production of rolled material, it is important to control the meandering of the rolled material in order to improve the sheet feeding efficiency and the product yield. The causes of the occurrence include roll alignment, roll wear, and roll There are equipment-like things due to one-sided reduction, etc., and material-like things due to poor flatness (end elongation or medium elongation) of the rolled material. Accordingly, there are various detection methods, and various methods are provided for detecting electromagnetically or optically and for detecting the meandering amount from the moment applied to the detection roll.

  Such conventional meandering detection devices are disclosed in, for example, Patent Documents 1 to 4.

Japanese Patent Publication No. 6-79733 Japanese Patent Publication No.62-44202 JP-A-2-107723 JP-A-6-265302

  However, in the conventional meandering detection device, for example, in the case of electromagnetic or optical detection, the configuration of the device is complicated and there are restrictions on the installation location, while dust, water vapor, etc. float in the atmosphere. As a result, there is a problem in durability under a bad environment, and it is difficult to detect with high accuracy. In addition, since the configuration of the apparatus is complicated, the initial investment cost may be high. Further, even if a detection roll is used, it is difficult to accurately detect or calculate the moment due to the influence of the defective plate shape, and similarly, it cannot be detected with high accuracy.

  Accordingly, an object of the present invention is to provide a meandering detection apparatus and method capable of detecting the meandering of a strip with high accuracy.

A meandering detection device according to a first aspect of the present invention for solving the above-mentioned problem is a plurality of divided rolls provided in the width direction of the traveling strip,
A table that guides the strip and is rotatably supported;
A fixing member supported by the table;
When the plate end of the strip is in contact with the divided roll, and the reaction force detector for detecting a reaction force acting on both ends of the divided roll the plate end of the strip is in contact individually,
A support arm having one end rotatably supporting the split roll and the other end supported by the fixing member via the reaction force detector;
After calculating the position of the end of the strip on the split roll based on the reaction force detected by the reaction force detector, the amount of meandering of the strip is calculated based on the position of the end of the strip. And a meandering amount calculation unit for calculating.

A meandering detection apparatus according to a second invention for solving the above-mentioned problems is as follows.
In the meandering detection apparatus according to the first invention,
A support shaft is provided on the fixing member, the support shaft is passed through the reaction force detector with a gap, and the support shaft is supported by the support arm via a bearing.

A rolling mill according to a third invention for solving the above-described problem is
A plurality of divided rolls provided in the width direction of the rolled material to travel;
A table that guides the rolled material and is rotatably supported;
A fixing member supported by the table;
When the plate end of the rolled material comes into contact with the split roll, a reaction force detector that individually detects the reaction force acting on both ends of the split roll with which the plate end of the rolled material comes in contact ;
A support arm having one end rotatably supporting the split roll and the other end supported by the fixing member via the reaction force detector;
After calculating the position of the plate end of the rolled material on the split roll based on the reaction force detected by the reaction force detector, the meandering amount of the rolled material is calculated based on the position of the plate end of the rolled material. A meandering amount calculation unit to calculate,
And a control actuator for controlling the meandering of the rolled material based on the meandering amount calculated by the meandering amount calculation unit.

A meandering detection method according to a fourth invention for solving the above-mentioned problem is as follows.
A plurality of divided rolls provided in the width direction are brought into contact with the plate end of the traveling strip, and reaction forces acting on both ends of the divided roll contacted with the plate ends of the strip are individually detected for each divided roll. Then, after calculating the position of the plate end of the strip on the split roll based on the individually detected reaction force, the meandering amount of the strip is obtained based on the position of the plate end of the strip. Features.

The rolling method according to the fifth invention for solving the above problem is as follows:
A plurality of divided rolls provided in the plate end of the traveling rolling material in the width direction in contact, detected for each of the divided rolls reaction force individually acting on both ends of the divided roll the plate end of the rolled material is in contact And after calculating the position of the plate end of the rolled material on the split roll based on the individually detected reaction force, the meandering amount of the rolled material is obtained based on the position of the plate end of the rolled material, The meandering of the rolled material is controlled based on the meandering amount.

According to the meandering detection apparatus according to the first aspect of the present invention, the plurality of split rolls provided in the width direction of the traveling strip, the table that guides the strip and is rotatably supported, and the table is supported. a fixing member that, when the plate end of the strip is in contact with the divided roll, and the reaction force detector for detecting a reaction force acting on both ends of the divided roll the plate end of the strip is in contact individually a support arm the other end with one end rotatably supports the divided roll are supported by the fixing member via the reaction force detector, on the basis of the reaction force detected by the reaction force detector A belt meandering unit for calculating the meandering amount of the strip based on the position of the strip end of the strip after computing the position of the strip end of the strip on the split roll; Can be detected with high accuracy .

According to the meandering detection device according to the second invention, in the meandering detection device according to the first invention, the fixing member is provided with a support shaft, and the reaction force detector is caused to pass through the support shaft with a gap. By supporting the support shaft on the support arm via a bearing, even if the strip plate contacts the split roll, no shear force acts on the reaction force detector. be able to. In addition, since no preload is applied to the reaction force detector, hysteresis can be prevented.

According to the rolling mill which concerns on 3rd invention, the several division | segmentation roll provided in the width direction of the rolling material to drive | work, the table supported rotatably while guiding the said rolling material, and the said table are supported. a fixing member, when the plate end of the rolled material is in contact with the divided roll, and the reaction force detector for detecting a reaction force acting on both ends of the divided roll the plate end of the rolled material are in contact individually, One end rotatably supports the split roll and the other end is supported by the fixing member via the reaction force detector, and the split based on the reaction force detected by the reaction force detector. After calculating the position of the plate end of the rolled material on the roll, the meandering amount calculating unit for calculating the meandering amount of the rolled material based on the position of the plate end of the rolled material, and the meandering amount calculating unit Based on the amount of meandering By a control actuator for controlling the meandering of the serial rolled material, since the meandering amount of the rolled material can be detected and controlled with high precision, it is possible to prevent the diaphragm accidents.

According to the meandering detection method according to the fourth aspect of the present invention, a plurality of divided rolls provided in the width direction are brought into contact with the plate end of the traveling strip, and the two ends of the divided roll contacted with the plate ends of the strip are contacted. The reaction force acting is detected individually for each of the divided rolls, and after calculating the position of the plate end of the strip on the split roll based on the individually detected reaction force, By calculating the meandering amount of the strip based on the position, the meandering of the strip can be detected with high accuracy.

According to the rolling method according to the fifth aspect of the present invention, a plurality of divided rolls provided in the width direction are brought into contact with the plate end of the rolling material to travel, and the plate ends of the rolled material are in contact with both ends of the divided roll. The reaction force to be detected individually for each of the split rolls, and after calculating the position of the plate end of the rolled material on the split roll based on the individually detected reaction force, the position of the plate end of the rolled material The meandering amount of the rolled material is obtained based on the meandering amount, and the meandering of the rolled material can be controlled with high accuracy by controlling the meandering of the rolled material based on the meandering amount, thereby preventing a drawing accident. be able to.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 is a schematic view of a rolling mill according to an embodiment of the present invention, FIG. 2 (a) is a plan view of a meandering detector, FIG. 2 (b) is a side view of FIG. 1 (a), and FIG. 4 (a) is a plan view showing the detector mounting structure, FIG. 4 (b) is a cross-sectional view taken along the line AA of FIG. 4 (a), and FIG. 6A is a front view showing the cooling structure of the split roll, FIG. 6B is a side view of FIG. 7A, and FIG. 7A shows another cooling structure of the split roll. FIG. 7B is a side view of the front view and FIG. In addition, the arrow in a figure has shown the rolling direction.

  As shown in FIG. 1, the rolling mill 1 includes a front rolling stand 2, a rear rolling stand 3, and a meandering detection device 4, and the meandering detection device 4 includes an outlet side of the front stage rolling stand 2 and an entrance of the rear stage rolling stand 3. It is provided between the side. The first stage rolling stand 2 is provided with rolling rolls 5a and 5b and the rolls 6a and 6b that support the rolling rolls 5a and 5b. Similarly, the second stage rolling stand 3 includes the rolling rolls 7a and 7b. , Rolls 8a and 8b for supporting the rolling rolls 7a and 7b are provided. A meandering amount calculator 41 and a rolling controller 43 are sequentially connected to the meandering detection device 4, and the rolling controller 43 is a rolling reduction cylinder 44 (control actuator) for the rolling rolls 5a and 5b and the rolling rolls 7a and 7b. )It is connected to the. In addition, S shows a rolling material and the arrow has shown the rolling direction.

  That is, the rolling material S rolled between the rolling rolls 5a and 5b of the former stage rolling stand 2 is passed over the meandering detection device 4 and rolled between the rolling rolls 7a and 7b of the latter stage rolling stand 3, and then a predetermined amount. It is transported to the device.

  Next, the meandering detection device 4 will be described with reference to FIGS.

  As shown in FIGS. 2A and 2B, the meandering detection device 4 includes a support shaft 12 connected to the drive motor 11 and extending in the width direction of the rolled material S. The table 13 is supported. The table 13 includes a guide member 14 that guides the rolled material S and a guide support member 15 that supports the guide member 14, and a roll unit 16 and both sides thereof are provided on the surface of the guide support member 15 on the downstream side in the rolling direction. The detector 17 installed in the is supported. The support shafts 12 on both sides of the table 13 are provided with bearings 18 that are supported by a frame (not shown).

  The roll unit 16 includes a split roll 20 that is rotated when the rolled material S contacts, a pair of support arms 21a and 21b that rotatably support the split roll 20 between one end, and the support arms 21a and 21b. And a fixing member 22 that supports the end and is supported by the guide support member 15 of the table 13.

  On the other hand, as shown in FIG. 3, the detector 17 includes a split roll 23 that is rotated when the rolling material S comes into contact, a pair of support arms 24 a and 24 b that support the split roll 23 between one end, and the support. A fixing member 25 that supports the other ends of the arms 24 a and 24 b and is supported by the guide support member 15 of the table 13 is provided.

  The split roll 23 is rotatably supported between the support arms 24a and 24b via self-aligning bearings 26a and 26b (or other bearings that can rotate in a spherical shape) provided at one end of the support arms 24a and 24b. ing. Further, a support shaft 27 is penetrated through the fixing member 25, and one end 27a and the other end 27b of the support shaft 27 are self-aligning bearings 28a and 28b (on bearings) provided at the other ends of the support arms 24a and 24b. Others are also acceptable). Ring-shaped torque detectors 29a and 29b are interposed between the other ends of the support arms 24a and 24b and the fixing member 25, and a support shaft 27 is formed at the openings of the torque detectors 29a and 29b. It is penetrated. The torque detectors 29a and 29b are connected to the meandering amount calculator 41 described above.

  Next, the mounting structure of the detector 17 will be described with reference to FIGS. As shown in FIGS. 4A and 4B, the detector 17 has a fixing member 25 fitted in a groove 30 formed in the guide support member 15, and is fixed by two fixing bolts 31. A liner 32 is sandwiched between the guide support member 15 and the fixing member 25. Further, a support plate 33 is supported on the bottom surface of the guide support member 15, and height adjusting bolts 34 are fastened so as to penetrate from the bottom surface side of the support plate 33 to the top surface side.

  That is, the detector 17 can be easily detached by removing the fixing bolt 31 and can be prevented from rattling with the table 13 by being fitted into the groove portion 30 of the guide support member 15. Thereby, the division | segmentation roll 23 can always be hold | maintained horizontally. The rolling direction of the rolled material S can be adjusted by changing the liner 25 to a predetermined thickness, and the vertical direction can be adjusted by adjusting the tightening amount of the height adjusting bolt 27. It has become. Such a mounting structure of the detector 17 can also be applied to a mounting structure of the roll unit 16.

  Therefore, when the rolling material S contacts the split roll 23, the load acts on the split roll 23 and is transmitted to the torque detectors 29a and 29b. In the torque detectors 29 a and 29 b, the input load is detected as a moment acting on both ends of the split roll 23 and is output to the meandering amount calculator 41. The meandering amount calculator 41 calculates the position of the plate end of the rolled material S on the split roll 23 from the input moment, and the meandering amount of the rolled material S (rolling stand 2, 2) from the plate end position of the rolled material S. 3), the meandering amount is output to the rolling controller 43. In the rolling controller 43, the rolling cylinder 44 is controlled based on the input meandering amount, and the rolling rolls 7a and 7b are adjusted so as to reduce the meandering amount of the rolled material S to perform rolling. This control is repeatedly performed.

  Here, the calculation process in the meandering amount calculator 41 will be described with reference to FIG. In the drawing, the side on which the drive motor 11 is disposed is indicated as a drive side, and the opposite side is indicated as an operation side.

  As shown in FIG. 5, the rolling material S is passed through the split rolls 20 and 23 in the direction of the arrow. A plate end Sd of the rolled material S is disposed on the drive-side split roll 23, and a plate end Sw of the rolled material S is disposed on the operation-side split roll 23. In addition, while the center of the division | segmentation roll 20 is shown as O, the center position of the plate width W of the rolling material S is shown as Y. The center O coincides with the traveling center position in the rolling stands 2 and 3. The meandering amount of the rolled material S is indicated as Yc (shift amount in the plate width direction X between the center O and the center Y).

When calculating the meandering amount Yc of the rolled material S, first, the load applied to each split roll 23 by the contact between the plate ends Sd and Sw is caused by the torque detectors 29a and 29b to generate moments Md ₁ , Mw ₁ and Md. ₂ and Mw ₂ are detected. Next, the coordinates (X direction) of the plate ends Sd, Sw are obtained from the moments Md ₁ , Mw ₁ and Md ₂ , Mw ₂ and the load position applied to each split roll 23 by a force balance equation. Then, the meandering amount Yc of the rolled material S is calculated from the coordinates of the plate ends Sd and Sw.

Therefore, when the rolled material S is simultaneously rolled in the former rolling stand 2 and the latter rolling stand 3 by making the above-described configuration, the meandering detection device 4 synchronizes the rolling speed between the rolling stands 2 and 3. For this purpose, the rolling material S has a loop by driving the drive motor 11 to swing the support shaft 12 and bringing the split rolls 20 and 23 into contact with the back surface of the rolling material S that passes over the guide member 14. It is possible to apply a constant tension. The meandering detection device 4 transmits the load of the rolling material S acting on the split roll 23 to the torque detectors 29a and 29b, and the moment Md ₁ acting on both ends of the split roll 23 detected by the torque detectors 29a and 29b. Mw ₁ and calculates the meandering amount Yc of the rolled material S from Md _2, Mw _2, the rolling rolls 5a on the basis of the meandering amount Yc, 5b or rolling rolls 7a, control the rolling force of 7b, i.e., of the rolled material S Control is performed so that the center Y coincides with the center O. Thereby, meandering of the rolling material S can be suppressed and a drawing accident at the rolling stands 2 and 3 can be prevented.

  Here, since the rolled material S is heated and rolled at a high temperature, the detector 17 is also heated excessively by heat transfer from the rolled material S. Therefore, as shown in FIGS. 6A and 6B, blades 35 are provided on both side surfaces of the split roll 23, and cooling water C is sprayed from the cooling device 36 toward the split roll 23 and the blades 35. . As a result, the split roll 23 can be cooled and the split roll 23 can be smoothly rotated by the momentum of the cooling water C, so that slip with the rolled material S can be reduced, and wrinkles and wear can also be reduced.

  Further, as shown in FIGS. 7A and 7B, a plurality of grooves 37 extending in the axial direction of the split roll 23 are formed on the surface of the split roll 23, and from the cooling device 36 toward the groove 37. The cooling water C may be sprayed. As a result, the split roll 23 can be cooled and the split roll 23 can be smoothly rotated by the momentum of the cooling water C, so that slip with the rolled material S can be reduced, and wrinkles and wear can also be reduced. Of course, the cooling structure shown in FIGS.

  Further, since the torque detectors 29a and 29b may be heated by heat transfer (heat conduction and radiation) from the rolled material S, a cooling passage (not shown) is formed in the fixing member 25 so that the cooling medium is circulated. It may be. As a result, the torque detectors 29a and 29b are not held at a high temperature, so that damage due to heat can be prevented and highly accurate detection can be performed.

  Further, a mixture of lubricating oil and air is fed into the self-aligning bearings 26a, 26b, 28a, 28b to prevent the self-aligning bearings 26a, 26b, 28a, 28b from running out of oil and dust. It doesn't matter.

  In this embodiment, the torque detectors 29a and 29b are provided between the support arms 24a and 24b and the fixing member 25 via the support shaft 27 and the self-aligning bearings 28a and 28b. In addition, a disk-shaped torque detector may be provided without using the self-aligning bearings 28a and 28b. In addition, when the difference between the maximum width and the minimum width of the sheet width W of the rolled material S is large, the detectors 17 adjacent to both sides of the roll unit 16 are increased to detect the difference in each sheet width. It is also possible to do.

Therefore, according to the rolling mill according to the present invention, the plurality of split rolls 23 provided in the width direction of the rolling material S traveling between the rolling stands 2 and 3 and the rolling material S are guided and rotatably supported. The load of the rolling material S acting on both ends of the table 13, the fixing member 25 supported by the table 13, and the rolling material S when contacting the dividing roll 23 is moments Md ₁ , Mw ₁ and Md _2. , Mw ₂ individually detecting torque detectors 29a, 29b, and a support arm 24a having one end rotatably supporting the split roll 23 and the other end supported by the fixing member 25 via the torque detectors 29a, 29b. , 24b and the torque detector 29a, meandering amount Starring for calculating the meandering amount Yc of the rolled material S based on the moment Md _1, Mw ₁ and Md _2, Mw ₂ detected by 29b Since the rolling device S and the rolling down cylinder 44 for controlling the meandering of the rolling material S based on the meandering amount Yc can be provided, the meandering of the rolling material S can be controlled with high accuracy. A squeezing accident can be prevented.

  Further, by providing a support shaft 27 that supports the torque detectors 29a and 29b on the fixed member 25, and having one end 27a and the other end 27b supported by self-aligning bearings 28a and 28b provided on the support arms 24a and 24b, Even if the rolling material S comes into contact with the split roll 23, the shear force does not act on the torque detectors 29a and 29b, so that it can be detected with high accuracy. Furthermore, since no preload is applied to the torque detectors 29a and 29b, hysteresis can be prevented.

  The present invention can be applied to a looper device provided between adjacent rolling mills.

It is the schematic of the rolling mill which concerns on one Example of this invention. (A) is a top view of a meandering detection apparatus, (b) is a side view of the same figure (a). It is an expanded sectional view of a detector. (A) is a top view which shows the attachment structure of a detector, (b) is AA arrow sectional drawing of the figure (a). It is a schematic diagram which shows the effect | action at the time of moment detection. (A) is a front view which shows the cooling structure of a division | segmentation roll, (b) is a side view of the figure (a). (A) is a front view which shows the other cooling structure of a division | segmentation roll, (b) is a side view of the figure (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling machine 2 Pre-stage rolling stand 3 Subsequent rolling stand 4 Meander detection apparatus 5a, 5b Roll roll 6a, 6b Roll 7a, 7b Roll roll 8a, 8b Roll 11 Drive motor 12 Support shaft 13 Table 14 Guide member 15 Guide support member 16 Roll Unit 17 Detector 18 Bearing 20, 23 Split roll 21a, 21b, 24a, 24b Support arm 22, 25 Fixing member 26a, 26b, 28a, 28b Self-aligning bearing 27 Support shaft 27a, 27b End 29a, 29b Torque detector 30 Groove part 31 Fixing bolt 32 Liner 33 Support plate 34 Height adjusting bolt 35 Blade 36 Cooling device 37 Groove part 41 Meander amount calculator 43 Rolling controller 44 Rolling cylinder 44

Claims (5)

A plurality of split rolls provided in the width direction of the traveling strip,
A table that guides the strip and is rotatably supported;
A fixing member supported by the table;
When the plate end of the strip is in contact with the divided roll, and the reaction force detector for detecting a reaction force acting on both ends of the divided roll the plate end of the strip is in contact individually,
A support arm having one end rotatably supporting the split roll and the other end supported by the fixing member via the reaction force detector;
After calculating the position of the end of the strip on the split roll based on the reaction force detected by the reaction force detector, the amount of meandering of the strip is calculated based on the position of the end of the strip. A meandering detection device comprising: a meandering amount computing unit for computing. The meandering detection apparatus according to claim 1,
A meandering detection device, wherein the fixing member is provided with a support shaft, the reaction force detector is passed through the support shaft with a gap, and the support shaft is supported by the support arm via a bearing. A plurality of divided rolls provided in the width direction of the rolled material to travel;
A table that guides the rolled material and is rotatably supported;
A fixing member supported by the table;
When the plate end of the rolled material comes into contact with the split roll, a reaction force detector that individually detects the reaction force acting on both ends of the split roll with which the plate end of the rolled material comes in contact ;
A support arm having one end rotatably supporting the split roll and the other end supported by the fixing member via the reaction force detector;
After calculating the position of the plate end of the rolled material on the split roll based on the reaction force detected by the reaction force detector, the meandering amount of the rolled material is calculated based on the position of the plate end of the rolled material. A meandering amount calculation unit to calculate,
A rolling mill comprising: a control actuator that controls meandering of the rolled material based on the meandering amount calculated by the meandering amount calculation unit. A plurality of divided rolls provided in the width direction are brought into contact with the plate end of the traveling strip, and reaction forces acting on both ends of the divided roll contacted with the plate ends of the strip are individually detected for each divided roll. Then, after calculating the position of the plate end of the strip on the split roll based on the individually detected reaction force, the meandering amount of the strip is obtained based on the position of the plate end of the strip. A characteristic meander detection method. A plurality of divided rolls provided in the plate end of the traveling rolling material in the width direction in contact, detected for each of the divided rolls reaction force individually acting on both ends of the divided roll the plate end of the rolled material is in contact And after calculating the position of the plate end of the rolled material on the split roll based on the individually detected reaction force, the meandering amount of the rolled material is obtained based on the position of the plate end of the rolled material, A rolling method characterized by controlling meandering of the rolled material based on the amount of meandering.

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