JP6248956B2 - Metal strip winding method and metal strip winding device - Google Patents

Description

  The present invention relates to a metal band winding method and a metal band winding apparatus.

  Conventionally, when a metal strip is wound in a coil shape by a winding device, a scratch may be generated on the surface of the metal strip.

  This scratch is caused by the coil swaying around the drive shaft end of the winding shaft due to poor winding of the metal strip around the winding shaft of the winding device or the cross-sectional shape of the metal strip. Is considered to be caused by being wound while rubbing each other.

  When such a scratch is generated on the surface of the metal strip, the yield is greatly reduced due to the removal of the scratched portion or the like.

  On the other hand, Patent Document 1 discloses that a metal belt winding device includes a first laser sensor (laser distance meter) that detects a winding diameter on the driving side of the winding shaft, and a working side of the winding shaft. A second laser sensor (laser distance meter) is installed to detect the winding diameter of the coil, and the amount of coil swinging is detected using information on the winding diameter of the coil output from these laser sensors. A technique for performing pass / fail determination (determining whether or not a scratch has occurred) has been proposed.

JP 2004-130362 A

  However, the technique for determining whether or not to wind a metal strip described in Patent Document 1 has the following problems.

  That is, when performing the winding / non-rolling determination for the entire length of the metal band, a specification is required that allows the winding / unwinding determination to be performed immediately before winding the metal band on the winding shaft until the coil diameter reaches the maximum diameter. Is done. When trying to satisfy this required specification, the laser sensor must be installed near the take-up shaft, but the vicinity of the take-up shaft has a pit structure in order to install a coil take-up mechanism and a coil transfer device. This causes problems in terms of maintainability, such as the need for a temporary scaffold when inspecting and repairing the laser sensor.

  Further, since the laser sensor is an optical device, in order to maintain its performance, it is necessary to install a dust prevention function such as an air purge in the projector and the light receiver, resulting in a disadvantage in terms of cost.

  The present invention has been made in view of the circumstances as described above, and when winding a metal strip into a coil shape, the winding of the metal strip can be performed with a superiority in maintenance and cost. It is an object of the present invention to provide a method and a metal band winding device.

  The inventors of the present invention pay attention to the fact that a tension meter for measuring the winding tension is installed as an auxiliary device on the entrance side of the winding device, and the tension meter is determined to determine whether or not to take up (scratch) We conducted intensive studies to determine whether it could be used for the occurrence or non-occurrence). As a result, there is a deviation (differential tension) between the work side tension (tension on the side where the drive motor is not installed) and the drive side tension (tension on the side where the drive motor is installed) when winding the metal strip around the coil. It was found that there was a strong correlation with the amount of vibration of the coil, and the idea was to determine whether or not scratching occurred based on the value of the differential tension.

  The present invention is based on the above idea and has the following features.

  [1] In a winding method in which a metal strip is wound in a coil shape by a winding device, the working side tension and the driving side tension of the metal strip are measured using a tension meter installed on the entry side of the winding device, and measured. When the differential tension between the working side tension and the driving side tension is less than a predetermined threshold, it is determined that the winding has passed, and when the differential tension is greater than or equal to the threshold, it is determined that the winding has failed. The winding method of the metal band.

  [2] The winding method of the metal strip according to [1], wherein when it is determined that the winding has failed, the winding speed of the metal strip is reduced.

  [3] In a winding device for winding a metal strip in a coil shape, a tension meter installed on the entry side of the winding device to measure the working side tension and the driving side tension of the metal strip, and the tension meter When the differential tension between the applied work side tension and the drive side tension is less than a predetermined threshold value, it is determined that the winding has passed, and when the differential tension is greater than or equal to the threshold value, the winding is determined to be unsuccessful. A metal strip take-up device comprising a pass / fail judgment means.

  [4] The metal band winding device according to [3], further including means for reducing a winding speed of the metal band when it is determined that the winding is unsuccessful.

  In the present invention, normally, a tension meter installed as an auxiliary device on the entry side of the winding device is utilized to determine whether or not to take up (scratch occurrence determination). This eliminates the need for a temporary scaffold for inspections and repairs and a dust prevention function for maintaining performance, and makes a winding / non-rolling determination that is superior in terms of maintainability and cost. be able to.

It is a figure which shows the structure of the winding apparatus in one Embodiment of this invention. It is a figure which shows the whirling of the coil at the time of winding. It is a flowchart of the winding acceptance / rejection determination in one Embodiment of this invention.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a winding device according to an embodiment of the present invention.

  As shown in FIG. 1, the winding device 10 in this embodiment winds the metal strip 1 as a coil 2, and includes a winding shaft 11, a deflector roll 12 installed on the entry side, and a winding shaft. 11, a tension meter 13 installed between the deflector roll 12, a differential tension calculator 14 connected to the tension meter 13, a rotation detector 15 installed on the winding shaft 11, and a rotation speed detector 15. A pulse transmitter 16, a differential tension calculator 14, and a winding up / down calculator 17 connected to the pulse transmitter 16.

  Here, the tension meter 13 measures the work side tension (tension on the side where the drive motor is not installed) and the drive side tension (tension on the side where the drive motor is installed) of the metal band 1, and calculates the differential tension. The device 14 calculates the differential tension (absolute value of the difference between the work side tension and the drive side tension) based on the work side tension and the drive side tension measured by the tension meter 13, Output. The working side tension and the driving side tension may be the tension acting on the entire cross section on the working side and the tension acting on the entire cross section on the driving side, with the center line in the width direction of the metal band 1 as a boundary. It is good also as the tension | tensile_strength which acts on the predetermined | prescribed cross section of the drive side, and the tension | tensile_strength which acts on the predetermined cross section of a drive side by making 1 width direction center line into a symmetrical axis. In this case, the absolute amount of tension may be used, or the tension per unit cross-sectional area may be used.

  The rotation speed detector 15 detects the rotation of the winding shaft 11, and the pulse transmitter 16 winds a pulse indicating the rotation speed of the winding shaft 11 based on the rotation signal detected by the rotation speed detector 15. The result is output to the pass / fail calculator 17.

  Then, the winding / unmatching determination unit 17 determines whether or not the metal plate 1 is winding (scratch occurrence determination) based on information from the differential tension calculator 14 and the pulse transmitter 16.

  FIG. 2 shows that the coil 2 swings around the drive shaft end of the winding shaft 11 due to the winding failure of the metal strip 1 around the winding shaft 11 or the cross-sectional shape of the metal strip 1. A state in which scratches are generated on the surface is shown.

  On the other hand, the winding device 10 according to this embodiment performs the winding / non-winding determination (scratch occurrence determination) of the metal plate 1 according to the procedure shown in FIG.

  (S1) First, since the start of winding of the metal band 1 is affected by fluctuations in tension at the time of winding, vibration of the metal band 1, and the like, the determination of whether or not to wind is not performed.

  In other words, the winding / unmatching determination unit 17 determines whether or not the number of pulses received from the pulse generator 16 (the number of rotations of the winding shaft 11) is equal to or greater than the predetermined number n. Then, when the rotational speed of the winding shaft 11 is not equal to or greater than the predetermined number n, the winding acceptance / rejection determination is not performed. On the other hand, when the rotation speed of the winding shaft 11 is equal to or more than the predetermined number n, the winding acceptance / rejection determination is started. The predetermined number n is 3 to 5 rotations, for example.

  (S2) When the winding acceptance / rejection determination is started, the tension meter 13 measures the working side tension and the driving side tension of the metal strip 1, and the differential tension calculator 14 measures the working side tension and the driving side tension measured by the tension meter 13. The differential tension (= | working side tension−driving side tension |) is calculated based on.

  (S3) The winding / unwinding calculator 17 determines whether or not the differential tension is equal to or greater than a predetermined threshold value. If the differential tension is not greater than or equal to the threshold value (if the differential tension is less than the threshold value), it is determined that there is no concern about the occurrence of scratches and it is determined that the winding has passed. If the differential tension is greater than or equal to the threshold value, it is determined that there is a concern about the occurrence of scratches, and it is determined that winding has failed.

  When it is determined that the winding has failed, the winding control device (not shown) immediately lowers the winding speed of the metal strip 1 within a range that does not hinder the winding operation itself. For example, the winding speed is lowered within a range in which the winding tension acts on the metal band 1. Thereby, the rubbing force between the surfaces of the metal strip 1 is reduced, and the generation of scratches is suppressed. At that time, the winding efficiency is reduced, but the yield reduction due to scratching can be minimized.

  In addition, what is necessary is just to set the threshold value of differential tension | tensile_strength for every component composition and dimension of the metal strip 1 based on the operation performance.

  The tension meter 13 may be any tension meter as long as it can measure the work-side tension and the drive-side tension as well as the entire winding tension. For example, a roll type in which a plurality of load cells are embedded in the roll surface layer portion in the width direction. A tensiometer or the like may be used.

  In this way, in this embodiment, normally, the tension meter 13 installed as an accessory device on the entry side of the winding device is utilized to determine whether to take up or not (scratch occurrence determination). Therefore, there is no need to provide a temporary scaffold for inspection / repair as in Patent Document 1 or a dust prevention function for maintaining performance, and it is possible to determine whether or not to take up the coil with excellent maintainability and cost. It can be carried out.

DESCRIPTION OF SYMBOLS 1 Metal strip 2 Coil 10 Winding device 11 Winding shaft 12 Deflector roll 13 Tension meter 14 Differential tension calculator 15 Rotation detector 16 Pulse transmitter 17 Winding acceptance / rejection determination calculator

Claims (4)

In the winding method of winding a metal strip in a coil shape with a winding device, the coil is swung around the drive side shaft end of the winding shaft, and the surface of the metal strip is wound while rubbing each other. For a certain scratch, the work side tension and drive side tension of the metal band are measured using a tension meter installed on the entrance side of the winding device, and the differential tension between the measured work side tension and drive side tension is determined in advance. If it is less than the threshold value, it is determined that there is no concern about the occurrence of scratches, and it is determined that the winding has passed. A method of winding a metal strip, characterized by determining.   The winding method of the metal strip according to claim 1, wherein the winding speed of the metal strip is reduced when it is determined that the winding has failed. In a winding device that winds a metal strip in a coil shape, the coil swings around the drive shaft end of the winding shaft, and the scratch that is caused by the winding of the metal strip while rubbing the surfaces of each other A tension meter installed on the entrance side of the winding device for measuring the working side tension and the driving side tension of the metal strip, and the differential tension between the working side tension and the driving side tension measured by the tensiometer in advance. If it is less than the set threshold value, it is judged that there is no concern about the occurrence of scratches, and it is judged that the winding has passed. A winding device for winding a metal band, characterized in that it comprises means for determining whether or not to take up or not.   4. The metal band winding device according to claim 3, further comprising means for reducing the winding speed of the metal band when it is determined that the winding has failed.

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