Abstract
A meandering amount detection method for a metal strip that detects a meandering amount of a metal strip traveling in a state of being overlapped in a plurality of stages at intervals, the meandering amount detection method includes: measuring a distance from a mounting position of a distance meter in a direction intersecting a width direction of a metal strip, using a plurality of distance meters provided side by side in the width direction of the metal strip on at least one side in a width direction of the metal strips overlapped in the plurality of stages; and detecting a stage of a metal strip in which meandering occurs and a meandering amount, using the mounting position of a distance meter and the measurement value.
Claims
1.-3. (canceled)
4. A meandering amount detection method for a metal strip that detects a meandering amount of a metal strip traveling in a state of being overlapped in a plurality of stages at intervals, the method comprising: measuring a distance from a mounting position of a distance meter in a direction intersecting a width direction of a metal strip, using a plurality of distance meters provided side by side in the width direction of the metal strip on at least one side in a width direction of the metal strips overlapped in the plurality of stages; and detecting a stage of a metal strip in which meandering occurs and a meandering amount, using the mounting position of a distance meter and the measurement value.
5. A meandering control method for a metal strip, comprising controlling meandering of a metal strip based on a meandering amount of the metal strip detected by using the meandering amount detection method for the metal strip according to claim 4.
6. The method according to claim 5, comprising correcting meandering of a metal strip in another stage when meandering of a metal strip in another stage is detected after meandering of a metal strip in a stage in which meandering is detected is corrected.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a side view illustrating a configuration of a looper to which a meandering control device for a metal strip, which is an example, is applied.
[0014] FIG. 2 is a block diagram illustrating a configuration of a meandering control device for a metal strip, which is an example.
[0015] FIG. 3 is a diagram explaining parameters detected by a distance meter illustrated in FIG. 2.
[0016] FIG. 4 is a diagram explaining a meandering control method for a metal strip, which is an example.
[0017] FIG. 5 is a diagram explaining a meandering control method for a metal strip, which is an example.
[0018] FIG. 6 is a diagram explaining a meandering control method for a metal strip, which is an example.
[0019] FIG. 7 is a diagram explaining a meandering control method for a metal strip, which is an example.
[0020] FIG. 8 is a diagram explaining a meandering control method for a metal strip, which is an example.
[0021] FIG. 9 is a diagram explaining a meandering control method for a metal strip, which is an example.
[0022] FIG. 10 is a diagram explaining a meandering control method for a metal strip, which is an example.
REFERENCE SIGNS LIST
[0023] 1 LOOPER [0024] 2, 2a, 2b, 2c, 2d METAL STRIP [0025] 3 STEERING ROLL [0026] 4 LOOPER CAR [0027] 10 MEANDERING CONTROL DEVICE FOR METAL STRIP [0028] 11, 11_1, 11_2, 11_3, 11_n DISTANCE METER [0029] 12 MEANDERING DETECTOR [0030] 13 CONTROL DEVICE
DETAILED DESCRIPTION
[0031] A configuration of a meandering control device for a metal strip, which is an example, will be described below with reference to the drawings.
Configuration of Looper
[0032] A configuration of a looper to which a meandering control device for a metal strip, which is an example, is applied will be first described with reference to FIG. 1.
[0033] FIG. 1 is a side view illustrating a configuration of a looper to which a meandering control device for a metal strip is applied. As illustrated in FIG. 1, in a looper 1 to which a meandering control device for a metal strip is applied, a metal strip 2 is passed through to reciprocate between a steering roll 3 and a looper car 4. Therefore, metal strips 2 (2a, 2b, 2c, and 2d) in a plurality of stages are present at intervals in the looper 1. In this example, the meandering control device for a metal strip detects the meandering amount of the metal strip 2 in the looper 1, in any stage, in a space-saving and cost-saving manner, and corrects the meandering of the metal strip 2.
Configuration of Meandering Control Device for Metal Strip
[0034] A configuration of a meandering control device for a metal strip will now be described with reference to FIGS. 2 and 3.
[0035] FIG. 2 is a block diagram illustrating a configuration of a meandering control device for a metal strip. As illustrated in FIG. 2, a meandering control device 10 for a metal strip includes n (n≥2) distance meters 11, a meandering detector 12, and a control device 13.
[0036] As illustrated in FIG. 3, the distance meter 11 is constituted by one-dimensional distance meters provided side by side in the width direction of the metal strip 2 on at least one side in the width direction of the metal strips 2 overlapped in a plurality of stages. The distance meter 11 detects values of parameters h and l, and outputs electric signals indicating the detection values to the meandering detector 12. The parameter h indicates the height of the distance meter 11 (11_j (j=1 to n)) from a ground F, and the parameter l indicates the measurement value of the distance meter 11 (11_j (j=1 to n)). Note that, in the drawing, C.sub.j (j=1 to n) indicates a width-direction mounting position of the distance meter 11. The mounting position of the distance meter 11 is changed according to the meandering amount of the metal strip 2 acceptable by a user, and the fineness of the control amount can be determined by the number of distance meters 11. By setting the distance meters 11 on both the load side and the anti-load side in the width direction of the metal strip 2, meandering of the metal strip 2 in either direction can be detected.
[0037] The meandering detector 12 detects a meandering amount s.sub.i of the metal strip 2 in the i-th (in this example, Ii=1 to 4) stage based on the electric signal output from the distance meter 11, and outputs an electric signal indicating the detected meandering amount s.sub.i to the control device 13.
[0038] The control device 13 performs control so that the meandering amount s.sub.i of the metal strip 2 in the i-th stage detected by the meandering detector 12 falls within a predetermined range. Specifically, the control device 13 corrects the meandering of the metal strip 2 in the i-th stage by tilting the steering roll directly connected to the metal strip 2 in the i-th stage.
[0039] A meandering amount detection method and a meandering control method for the metal strip 2 by the meandering detector 12 and the control device 13 will be described below in detail with reference to FIGS. 4 to 10.
[0040] As illustrated in FIG. 4, it is first assumed that only the metal strip 2c meanders. In this example, the measurement values l of the distance meter 11_1 and the distance meter 11_2 are h.sub.3, and the measurement value l of the distance meter 11_3 is h. Thus, the meandering detector 12 determines that no meandering occurs in the metal strip 2d and that the meandering amount c.sub.2 corresponding to the width-direction mounting position of the distance meter 11_2 occurs in the metal strip 2c. Therefore, the control device 13 corrects the meandering of the metal strip 2c by tilting the steering roll directly connected to the metal strip 2c so that the meandering amount c.sub.2 of the metal strip 2c is corrected. As a result, as illustrated in FIG. 5, the measurement values l of all the distance meters 11 become h, and it is detected that no meandering occurs in any of the metal strips 2a to 2d.
[0041] As illustrated in FIG. 6, it is then assumed that a plurality of metal strips (e.g., metal strip 2c and metal strip 2d) meanders, and that each meandering can be detected. In this example, the measurement value l of the distance meter 11_1 is h.sub.4, the measurement value l of the distance meter 11_2 is h.sub.3, and the measurement value l of the distance meter 11_3 is h. Thus, the meandering detector 12 determines that the meandering amount c.sub.1 corresponding to the width-direction mounting position of the distance meter 11_1 is generated in the metal strip 2d and that the meandering amount c.sub.2 corresponding to the width-direction mounting position of the distance meter 11_2 is generated in the metal strip 2c. Therefore, the control device 13 corrects the meandering of the metal strip 2d by tilting the steering roll directly connected to the metal strip 2d so that the meandering amount of each of the metal strip 2d and the metal strip 2c is corrected, while the control device corrects the meandering of the metal strip 2c by tilting the steering roll directly connected to the metal strip 2c. As a result, as illustrated in FIG. 7, the measurement values l of all the distance meters become h, and it is detected that no meandering occurs in any of the metal strips 2a to 2d.
[0042] As illustrated in FIG. 8, it is lastly assumed that, although a plurality of metal strips (e.g., metal strip 2b and metal strip 2d) meanders, only a part of the meandering is detected. In this example, the measurement values l of the distance meters 11_1 and 11_2 are h.sub.4, and the measurement value l of the distance meter 11_3 is h. Thus, the meandering detector 12 determines that the meandering amount c.sub.2 corresponding to the width-direction mounting position of the distance meter 11_2 is generated in the metal strip 2d. Therefore, the control device 13 corrects the meandering of the metal strip 2d by tilting the steering roll directly connected to the metal strip 2d so that the meandering amount of the metal strip 2d is corrected. As a result, as illustrated in FIG. 9, the measurement value l of the distance meter 11_1 becomes h.sub.2, and the measurement values l of the distance meters 11_2 and 11_3 become h. Thus, the meandering detector 12 determines that no meandering occurs in the metal strips 2c and 2d and that the meandering amount ci corresponding to the mounting position of the distance meter 11_1 occurs in the metal strip 2b. Therefore, the control device 13 corrects the meandering of the metal strip 2d by tilting the steering roll directly connected to the metal strip 2b so that the meandering amount of the metal strip 2b is corrected. As a result, as illustrated in FIG. 10, the measurement values l of all the distance meters become h, and it is detected that no meandering occurs in any of the metal strips 2a to 2d.
[0043] Although examples have been described above, this disclosure is not limited by the description and the drawings constituting a part of the disclosure according to the examples. For example, since my methods are characterized by being used in a place where metal strips are overlapped in a plurality of stages, they can also be applied to a place other than a looper (e.g., the vicinity of a joining portion of metal strips when a plurality of metal strip delivery devices is provided). As described above, other configurations, examples, operation techniques, and others implemented by those skilled in the art and others based on the examples are all included in the scope of this disclosure.
INDUSTRIAL APPLICABILITY
[0044] I made it possible to provide a meandering amount detection method for a metal strip that is capable of detecting a meandering amount of a metal strip in a looper, in any stage, in a space-saving and cost-saving manner. It is possible to provide a meandering control method for a metal strip, which is capable of detecting a meandering amount of a metal strip in a looper, in any stage, in a space-saving and cost-saving manner and correcting the meandering of the metal strip.
