JP6028496B2 - Winding device and control method of steel plate tail end stop position - Google Patents

Description

  The present invention relates to a winding device that forms a coil by winding a steel plate and a method for controlling a steel plate tail end stop position.

  Generally, when a coil is formed by winding a steel sheet rolled in a hot rolling factory with a mandrel, the tail end of the steel sheet is used to suppress damage to the equipment and satisfy the coil transport conditions and the requirements of the next process. It is necessary to stop the rotation of the mandrel so that the position stops at a predetermined position. Specifically, in order to facilitate handling of coil binding and conveyance, it is necessary to stop the rotation of the mandrel so that the tail end position of the steel plate stops at a predetermined position below the coil. For this reason, conventionally, there is a technique for detecting the tail end position of a steel plate using a load sensor disposed between the pinch roll and the mandrel, and controlling the tail end stop position of the steel plate based on the detection result. Proposed. Patent Document 1 discloses a technique for detecting the tail end position of a steel plate based on a change in the position of a wrapper roll that presses the steel plate from the outer peripheral side of the coil, and controlling the tail end stop position of the steel plate based on the detection result. Proposed.

JP 2001-179333 A

  However, in the technology using the stock sensor, the tail end position of the steel sheet may not be detected with high accuracy depending on the specification and number of stock sensors and the shape of the tail end. Specifically, when the in-stock sensor detects the center position in the width direction of the steel plate, as shown in FIG. The in-stock sensor recognizes the position P2 near the center in the width direction as the tail end position, even though the position P1 near both ends in the width direction is originally the tail end position. End up. In order to solve such a problem, a method of cutting the fishtail shape in advance is conceivable. However, when the fishtail shape is cut, the yield decreases. On the other hand, in the technique described in Patent Document 1, when the thickness of the steel plate is thin, the change in the position of the wrapper roll becomes small, and the ratio of noise such as vibration of equipment in the change in the position of the wrapper roll becomes large. The tail end position cannot be detected with high accuracy. For this reason, according to the prior art, the tail end stop position may deviate from the target stop position. From such a background, it has been expected to provide a technique capable of controlling the tail end stop position of the steel plate to the target position with high accuracy.

  This invention is made | formed in view of the said subject, The objective provides the winding device which can control the tail end stop position of a steel plate to a target position with high precision, and the control method of a steel plate tail end stop position. There is.

  In order to solve the above-described problems and achieve the object, a winding device according to the present invention includes a mandrel that winds and rotates a steel plate in a coil shape by winding and rotating a tip portion of the steel plate, and a coil shape wound around the mandrel. Detected by the wrapper roll for applying a pressing force to the outer peripheral surface of the steel plate, a pressing force detecting unit for detecting the pressing force applied by the wrapper roll to the outer peripheral surface of the coiled steel plate, and the pressing force detecting unit It is determined whether or not the applied pressing force has changed, and when the pressing force has changed, it is determined that the tail end portion of the steel sheet has passed through the wrapper roll, and the rotation of the mandrel is stopped to stop the mandrel. And a tail end stop position control part for stopping the tail end part at a predetermined position.

  In the winding device according to the present invention as set forth in the invention described above, the tail end stop position control unit determines whether or not the pressing force detected by the pressing force detection unit is equal to or less than a predetermined value. When the force is less than or equal to the predetermined value, it is determined that the pressing force has changed.

  In order to solve the above-described problems and achieve the object, a method for controlling the steel plate tail end stop position according to the present invention includes a mandrel that winds and rotates the tip of the steel plate to wind the steel plate in a coil shape, and the mandrel. A wrapper roll for applying a pressing force to the outer circumferential surface of a coiled coiled steel sheet, and a method for controlling a steel sheet tail end stop position in a winding device, wherein the wrapper roll is an outer circumferential surface of the coiled steel sheet. And determining whether or not the pressing force detected in the pressing force detection step has changed, and when the pressing force has changed, the tail end of the steel plate A tail end stop position control step that stops the tail end portion of the steel sheet at a predetermined position by stopping the rotation of the mandrel by determining that the portion has passed the wrapper roll. And features.

  According to the winding device and the control method of the steel plate tail end stop position according to the present invention, the tail end position of the steel plate is detected using the fluctuation of the pressing force applied to the outer peripheral surface of the coiled steel plate by the wrapper roll. Therefore, the tail end stop position of the steel plate can be accurately controlled to the target position.

FIG. 1 is a schematic diagram showing a configuration of a winding device to which a steel plate tail end stop position control device according to an embodiment of the present invention is applied. FIG. 2 is a schematic diagram showing the movement of the wrapper roll before and after the tail end of the steel plate passes. FIG. 3 is a diagram showing the pressing force of the wrapper roll before and after the tail end portion of the steel plate passes. FIG. 4 is a flowchart showing the flow of tail end stop position control processing according to an embodiment of the present invention. FIG. 5 is a diagram showing a change in the tail end detection rate with a change in the thickness of the steel plate. FIG. 6 is a schematic diagram showing a fishtail shape of a steel plate.

  Hereinafter, a control device and a control method for a steel plate tail end stop position, which is an embodiment of the present invention, will be described with reference to the drawings.

[Configuration of winding device]
First, a configuration of a winding device to which a steel plate tail end stop position control device according to an embodiment of the present invention is applied will be described with reference to FIG.

  FIG. 1 is a schematic diagram showing a configuration of a winding device to which a steel plate tail end stop position control device according to an embodiment of the present invention is applied. As shown in FIG. 1, the winding device 1 includes a pair of pinch rolls 2a, 2b, a mandrel 3, and wrapper rolls 4a, 4b, 4c, 4d. The pair of pinch rolls 2a and 2b is configured to feed the steel sheet S to the mandrel 3 by rotating the steel sheet S while sandwiching the upper and lower surfaces of the steel sheet S to suppress the flapping of the steel sheet S while applying an appropriate tension to the steel sheet S. is there. The mandrel 3 winds and rotates the steel sheet S in a coil shape by winding and rotating the front end portion of the steel sheet S fed from the pair of pinch rolls 2a and 2b. The wrapper rolls 4 a to 4 d guide the tip of the steel plate S along the outer peripheral surface of the mandrel 3, press the steel plate S against the mandrel 3, generate a frictional force, and wind the steel plate S around the mandrel 3.

[Concept of the present invention]
Next, the concept of the present invention will be described with reference to FIGS.

  FIG. 2 is a schematic diagram showing the movement of the wrapper roll before and after the tail end of the steel plate passes. FIG. 3 is a diagram showing the pressing force of the wrapper roll before and after the tail end portion of the steel plate passes. In the winding device 1 described above, the steel sheet S is wound in a coil shape by rotating the mandrel 3 while applying a pressing force to the outer peripheral surface of the coiled steel sheet S by the wrapper rolls 4a to 4d. Therefore, as shown in FIGS. 2A and 2B, the pressing force of the wrapper roll 4a maintains a constant value F until the tail end portion SB of the steel sheet S passes through the wrapper roll 4a ( Time T = 0 to T1 shown in FIG.

  However, as shown in FIG. 2 (c), immediately after the tail end portion SB of the steel sheet S passes through the wrapper roll 4a, a step corresponding to the thickness of the steel sheet S is generated, and the roll SR of the wrapper roll 4a and the steel sheet S is produced. Are in a non-contact state, the pressing force of the wrapper roll 4a is rapidly reduced (time T = T1 shown in FIG. 3). Thereafter, since the wrapper roll 4a moves so as to contact the roll SR in order to maintain the pressing force, the pressing force of the wrapper roll 4a returns to a constant value F (after time T = T1 shown in FIG. 3). In the above description, the change in the pressing force of the wrapper roll 4a has been described. However, the change in the pressing force accompanying the passage of the tail end portion SB of the steel plate S also occurs in the other wrapper rolls 4b to 4d.

  As described above, in the winding device 1 described above, when the tail end portion SB of the steel sheet S passes through the wrapper rolls 4a to 4d, the pressing force of the wrapper rolls 4a to 4d is rapidly reduced. Therefore, the control device for the steel plate tail end stop position, which is an embodiment of the present invention, measures the pressing force of the wrapper roll 4a and detects a decrease in the pressing force of the wrapper roll 4a, thereby detecting the tail end portion of the steel plate S. SB was detected with high accuracy, and the tail end stop position of the steel sheet S was controlled to the target position with high accuracy. In the present embodiment, the change in the pressing force of the wrapper roll 4a is measured, but the wrapper roll for measuring the change in the pressing force is not limited to the wrapper roll 4a.

[Configuration of control device]
Next, with reference to FIG. 1, the structure of the control apparatus of the steel plate tail end stop position which is one Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the steel plate tail end stop position control device according to an embodiment of the present invention includes a load sensor 11, a pressing force detection unit 12, and a tail end stop position control unit 13. The stock sensor 11 detects the presence or absence of the steel sheet S using laser light, gamma rays, or the like. The pressing force detection unit 12 is configured by, for example, a load cell. The pressing force detection unit 12 detects the pressing force of the wrapper roll 4 a and outputs an electrical signal indicating the detected pressing force to the tail end stop position control unit 13. The tail end stop position control unit 13 is configured by an information processing device such as a microcomputer, and controls the tail end stop position of the steel sheet S to a target position by executing tail end stop position control processing described later.

[Tail end stop position control process]
Next, with reference to FIG. 4, the flow of the tail end stop position control process for the steel sheet S by the control device will be described.

  FIG. 4 is a flowchart showing the flow of tail end stop position control processing according to an embodiment of the present invention. The flowchart shown in FIG. 4 starts at the timing when the leading edge of the steel sheet S is detected by the stock sensor 11, and the tail end stop position control process proceeds to the process of step S1.

  In the process of step S <b> 1, the pressing force detection unit 12 measures the pressing force of the wrapper roll 4 a and outputs an electrical signal indicating the measured pressing force to the tail end stop position control unit 13. Thereby, the process of step S1 is completed and the tail end stop position control process proceeds to the process of step S2.

  In the process of step S2, the tail end stop position control unit 13 determines whether or not the pressing force of the wrapper roll 4a has decreased below a predetermined value based on the electrical signal output from the pressing force detection unit 12. As a result of the determination, when the pressing force of the wrapper roll 4a has not decreased below the predetermined value, the tail end stop position control unit 13 returns the tail end stop position control process to the process of step 1. On the other hand, when the pressing force of the wrapper roll 4a is reduced to a predetermined value or less, the tail end stop position control unit 13 advances the tail end stop position control process to the process of step 3.

  In the process of step S3, the tail end stop position control unit 13 detects and tracks the tail end position of the steel sheet S based on the time when the pressing force of the wrapper roll 4a is reduced below a predetermined value and the rotation speed of the mandrel 3. . Thereby, the process of step S3 is completed, and the tail end stop position control process proceeds to the process of step S4.

  In the process of step S4, the tail end stop position control unit 13 causes the tail end position of the steel sheet S to stop at a predetermined target position based on the tail end position of the steel sheet S detected by the process of step S3. Stop rotating. Thereby, the process of step S4 is completed and a series of tail end stop position control processes are complete | finished.

〔Example〕
FIG. 5 shows the result of detecting the tail end positions of a plurality of steel plates having different plate thicknesses by the tail end stop position control process. As shown in FIG. 5, according to the tail end stop position control process described above, the tail end detection rate is maintained at 98.6% or more even when the thickness of the steel sheet is reduced, and the tail end position of the steel sheet is accurately determined. Highly detected. Thereby, it was confirmed that the tail end stop position of the steel sheet S can be controlled to the target position with high accuracy by the tail end stop position control process.

  As is clear from the above description, according to the tail end stop position control process which is an embodiment of the present invention, the pressing force detection unit 12 is applied to the outer peripheral surface of the steel plate S in which the wrapper roll 4a is coiled. The tail end position control unit 13 determines whether or not the pressing force detected by the pressing force detection unit 12 has changed, and when the pressing force has changed, the tail end of the steel sheet S is detected. Is determined to have passed the wrapper roll 4a, and the tail end of the steel sheet S is stopped at a predetermined position by stopping the rotation of the mandrel 3. Thereby, the tail end stop position of the steel plate can be controlled with high accuracy to the target position. In addition, since the tail end position of the steel sheet can be detected with high accuracy by software processing without installing new equipment, the tail end stop position of the steel sheet can be accurately controlled to the target position without incurring capital investment and maintenance costs.

  Although the embodiment to which the invention made by the present inventor is applied has been described above, the present invention is not limited by the description and the drawings that form a part of the disclosure of the present invention according to this embodiment. That is, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Winding device 2a, 2b Pinch roll 3 Mandrel 4a, 4b, 4c, 4d Wrapper roll 11 Load sensor 12 Pushing force detection part 13 Tail end stop position control part

Claims (3)

A mandrel that winds and rotates the steel sheet into a coil by winding and rotating the tip of the steel sheet;
A pair of pinch rolls that feed the steel sheet into the mandrel;
A load sensor that is provided between the pair of pinch rolls and the mandrel, and detects a tip portion of the steel plate,
A wrapper roll for applying a pressing force to the outer peripheral surface of a coiled steel sheet wound around the mandrel;
At the timing when the tip of the steel plate is detected by the load sensor, a pressing force detection unit that starts a process of detecting the pressing force that the wrapper roll is applying to the outer peripheral surface of the coiled steel plate,
It is determined whether or not the pressing force detected by the pressing force detector has changed, and when the pressing force has changed, it is determined that the tail end portion of the steel sheet has passed the wrapper roll, and the mandrel is rotated. A tail end stop position control unit that stops the tail end of the steel sheet at a predetermined position by stopping
A winding device comprising:   The tail end stop position control unit determines whether or not the pressing force detected by the pressing force detection unit is equal to or less than a predetermined value. If the pressing force is equal to or less than the predetermined value, the pressing force varies. The winding device according to claim 1, wherein the winding device is determined to have performed. A steel plate in a winding device comprising: a mandrel that winds and rotates the tip of the steel plate in a coil shape; and a wrapper roll that applies a pressing force to the outer peripheral surface of the coiled steel plate wound around the mandrel. A control method of the tail end stop position,
At the timing when the leading edge of the steel sheet is detected by a load sensor that detects the leading edge of the steel sheet provided between the mandrel and a pair of pinch rolls that feeds the steel sheet to the mandrel, the wrapper roll A pressing force detection step for starting a process of detecting a pressing force applied to the outer peripheral surface of the coiled steel sheet;
It is determined whether or not the pressing force detected in the pressing force detection step has fluctuated. If the pressing force fluctuates, it is determined that the tail end portion of the steel sheet has passed through the wrapper roll, and the mandrel is rotated. A tail end stop position control step for stopping the tail end of the steel sheet at a predetermined position by stopping
A control method of a steel plate tail end stop position characterized by including.

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