JP6035999B2 - Steel plate meander control method and meander control device - Google Patents

Description

  The present invention relates to a meander control method and a meander control device for passing a steel plate through a process line.

  In the processing line of steel plates (steel strips), when passing steel plates, the center of the width of the steel plates may meander from the line center due to the influence of the camber or shape of the steel plates, and the amount of meandering is large. Then, operational troubles and quality troubles such as occurrence of rolling out in which the steel sheet deviates from the width direction of the sheet passing roll and narrowing in which the steel sheets overlap locally occur.

  In particular, in a continuous processing line after hot rolling (for example, a cold rolling line, an annealing line, a plating line), the tail end of the preceding steel plate and the tip of the succeeding steel plate are welded and continuously passed, so the preceding steel plate If the meandering occurs, there is a high possibility of affecting the subsequent steel plate.

  Therefore, in such a continuous processing line, a meandering control device and a meandering prevention mechanism are provided to perform meandering control (meandering correction).

  As such a meandering control device and meandering prevention mechanism, as described in Patent Documents 1 and 2, generally, a through-plate roll having a crown or a taper that achieves a self-correcting effect of the roll (hereinafter referred to as “ It is also referred to as a “through plate roll with crown”). At that time, the through-plate roll with the crown is fixed in the width direction.

  The meandering correction effect of the threading roll depends mainly on the size of the crown and taper of the threading roll and the winding angle of the steel sheet on the threading roll, and is therefore mainly applied to the deflector roll.

  As modeled in FIG. 7, the meandering correction effect of the steel sheet 1 by the crowned sheet-passing roll 2 is assumed to be the influence of the tension distribution in the roll width direction. At the center in the width direction on the entry side (0 point in FIG. 7), a moment M is generated in the steel sheet due to the tension distributed in the width direction of the steel sheet, deviating from the center in the width direction of the steel sheet. In this case, as apparent from FIG. 7, the meandering correction effect depends on the contact area between the crown-passing plate roll 2 and the steel plate 1, but depending on the shape of the steel plate 1 (ear extension, etc.) Since the contact areas of the steel plates 1 are different, the meandering correction effect is different even with the same steel plate size and the same meandering amount.

  Therefore, in order to cope with the above-described problem, in Patent Document 3, a pressing mechanism 90 (auxiliary roll 91, auxiliary roll 91, as shown in FIG. 8) is provided so that the steel plate 1 can be sufficiently wound around the crown passing plate roll 2. A meandering control method using a pressing device 92, a slack amount detection sensor 93, and a control device 94) has been proposed. An auxiliary roll 91 having a pressing device 92 and a looseness detection sensor 93 are installed in front of the through-plate roll 2 with a crown, and the auxiliary roll 91 is operated according to the looseness amount of the looseness sensor 93 so that the steel plate 1 is passed through. By being pushed into the plate roll 2 side, meandering correction can be performed by sufficient winding without being affected by the shape (such as ear extension) of the steel plate 1.

Japanese Patent Laid-Open No. 01-172527 JP 09-085324 A JP 05-277536 A

  However, in Patent Document 3, a through-plate roll with a crown fixed in the width direction is used, and a steel plate having the same width is always in contact with a position in the same width direction of the roll. Therefore, roll wear is severe and it is difficult to maintain the initial crown amount. If the amount of crown decreases due to wear, the meandering is not corrected even if the steel plate is sufficiently wound around the crowned plate roll by the auxiliary roll. Therefore, the through-plate roll with a crown whose rotational axis is fixed in the width direction must be periodically replaced.

  In addition, the corrugated sheet roll with the crown exerts the meandering correction effect when the steel sheet is wound around the sheet passing roll. As a result, only the roll that changes the traveling direction of the steel sheet (deflector roll) corrects the meandering. It will not be able to have a function. Therefore, when the steel plate is meandering in the width direction when the steel plate passes in a certain direction, the meandering cannot be corrected even with a support roll having a crown or taper.

  The present invention has been made in view of the above circumstances, and can perform meandering control in consideration of the wear of a threaded plate roll with a crown in a steel sheet processing line, and the processing line is constant. It is an object of the present invention to provide a meandering control method and meandering control device for a steel plate that enables meandering control regardless of the direction or the direction.

  In order to solve the above problems, the present invention has the following features.

  [1] In the passage of the steel plate, the relative width direction position of the single roll and the steel plate is changed by shifting the single roll having a crown or taper in the width direction while being in contact with one surface of the steel plate, A meandering control method for a steel sheet, wherein meandering correction is possible.

  [2] In the sheet passing of the steel plate, it has a mechanism for shifting the single roll having a crown or a taper in the width direction while being in contact with one surface of the steel plate, and the relative width direction position of the single roll and the steel plate is determined. A meandering control device for a steel sheet, wherein the meandering correction is made possible by making the change possible.

  According to the present invention, meandering control can be performed in consideration of the wear of the threading roll in the steel sheet processing line, and meandering control is possible regardless of whether the line threading is in a certain direction or the direction is changed. .

It is a figure which shows the meandering control apparatus in one Embodiment of this invention. It is a figure which shows the system configuration | structure of the meandering control apparatus in one Embodiment of this invention. It is a figure which shows meandering amount (DELTA) X, winding angle | corner (theta), and crown amount (DELTA) r. It is a figure which shows the influence of the meandering amount (DELTA) X and the winding angle | corner (theta) which have on the meandering correction moment M. FIG. It is a figure which shows the procedure which corrects the meander of a steel plate in one Embodiment of this invention. It is a figure which shows the state by which the meander of a steel plate is corrected in one Embodiment of this invention. It is the figure which modeled the meandering correction effect. It is the figure which showed the prior art (patent document 3).

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

  FIG. 1 is a schematic diagram of a meandering control apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the meandering control device according to one embodiment of the present invention is configured to control a meandering of a steel plate 1 in a processing line of the steel plate (steel strip) 1. Threading plate roll) 2 and crowned threading plate roll bearing mechanism 3 (pressing mechanism 4, width) which moves crowned threading plate roll 2 in the width direction (perpendicular to the paper surface) while abutting against one surface of steel plate 1 Direction shift mechanism 5) and the other surface of the steel plate 1 on the upstream side and the downstream side of the cross plate roll 2 with the crown so as to support when the through plate roll 2 with the crown is pressed against one surface of the steel plate 1. Are provided with two support rolls 6 that come into contact with each other, and a meandering sensor 7 installed on the downstream side of the crown passing plate roll 2.

  Then, the meandering amount of the steel plate 1 with respect to the line center (displacement in the center in the width direction of the steel plate 1 with respect to the line center) is measured by the meandering sensor 7. The roll 2 is shifted in the width direction, and the relative meandering amount of the through-plate roll 2 with crown and the steel plate 1 (displacement of the width center of the steel plate 1 with respect to the roll center (center in the roll width direction) of the through-plate roll 2 with crown) ) Is changed to perform meandering control and meandering correction.

  Thus, in this embodiment, the width direction shift mechanism 5 which moves the threading plate roll 2 with a crown in the width direction is provided, and the relative width direction position (relative) between the threading plate roll 2 with a crown and the steel plate 1 is provided. The meandering correction is made possible by changing the meandering amount.

  In addition, although the through-plate roll 2 with a crown is a single roll (the roll in which the roll which opposes on both sides of the steel plate 1 is not installed), only one through-plate roll 2 with a crown is described in FIG. There may be a plurality of the steel plates 1 in the traveling direction. Moreover, although it may be made to contact | abut on either the upper and lower surfaces of the steel plate 1, at least two support rolls 6 are required on the other surface.

  Moreover, in FIG. 1, although the process line in which the plate-feeding direction of the steel plate 1 is a straight line is shown, it is not restricted to this, The process line by which the plate-feeding direction of the steel plate 1 is changed in the middle may be sufficient.

  Next, FIG. 2 shows a system configuration of the meandering control apparatus in this embodiment.

As shown in FIG. 2, the system configuration of this meandering control device is that the meandering sensor 7 and the shift amount of the passing plate roll 2 with crown (roll shift amount: the amount of movement of the roll center of the passing plate roll 2 with crown relative to the line center). ), The meandering correction moment M for calculating the meandering correction moment M based on the setting value (actual value) of the roll shift amount. The calculation device 14, the result collection database 13 for collecting the results of the calculated value of the meandering correction moment M, and the O / C 12 in which information such as the steel type and dimensions of the steel plate are recorded.

  With this system configuration, the roll shift amount is set from the meandering amount measured by the meandering sensor 7 and the meandering correction moment M derived from the steel type and dimensions of the steel plate 1.

  At that time, the calculation value of the roll shift amount in the information processing apparatus 14 is calculated using a model formula. In the model shown in FIG. 7, as shown in the following formula (1), the meandering correction moment M to be generated is the meandering amount ΔX, winding angle θ, crown amount (or taper amount) as shown in FIG. It becomes a function of Δr.

      M = f (ΔX, θ, Δr) (1)

  The relationship between each parameter (ΔX, θ, Δr) and the meandering correction moment M, as shown in FIG. 4, the meandering that occurs as the meandering amount ΔX increases and the winding angle θ increases. The correction moment M increases. On the other hand, when the crown amount Δr decreases due to roll wear or the like, the generated meander correcting moment M decreases.

  FIG. 5 shows a procedure for correcting the meandering of the steel sheet 1 using the relationship of the expression (1).

  (S1) The meandering amount ΔX of the steel sheet 1 is measured by the meandering sensor 7.

  (S2) Data (steel type / dimension) of the steel plate being processed is extracted from the O / C 12, and the meandering is performed in the same steel type / dimension as the steel plate being processed from the past result data stored in the result collection database 13. Data that matches or approximates the amount ΔX and the crown amount (considering the amount of roll wear) Δr is searched, and the moment M necessary for correcting the meandering of the steel plate being processed is determined from the data.

  (S3) The information processing apparatus 11 calculates a set value of the roll shift amount ΔXs so that the determined meandering correction moment M is generated.

  (S4) The set value of the calculated roll shift amount ΔXs is output from the information processing apparatus 11 to the width direction shift mechanism 5 of the through-plate roll bearing mechanism 3 with crown. The crown passing plate roll bearing mechanism 3 shifts the crown passing plate roll 2 by the roll shift amount ΔXs.

  (S5) The meandering sensor 7 confirms that the meandering of the steel sheet 1 has been corrected (detects the meandering amount ΔX = 0).

  (S6) The through-plate roll 2 with crown is returned to the origin (position of roll shift amount ΔXs = 0).

As shown in FIG. 2, the actual value of the roll shift amount ΔXs is output to the meandering correction moment calculation device 14, and the meandering correction moment M when the relative meandering amount is ΔXr (= ΔX + ΔXs) is calculated. Output to the results collection database 13. In the result collection database 13, the meandering amount ΔX, the crown amount Δr considering roll wear, and the calculated meandering correction moment M are stored in association with each other.

  In the meandering control method according to the above procedure, when the center of the width of the steel plate 1 deviates from the line center, the through-plate roll 2 with the crown and the steel plate 1 are shifted in the direction opposite to the removed width direction. In this equation (1), the meandering amount ΔXr (= ΔX + ΔXs) with respect to the crown passing plate roll 2 is apparently increased. As a result, the generated meandering correction moment M increases, and it becomes easy to correct the meandering of the steel sheet 1.

  FIG. 6 is a schematic view showing the state, and FIG. 6A shows a state in which the crowned sheet passing roll 2 is shifted by ΔXs corresponding to the meandering amount ΔX of the steel plate 1. b) shows a state where the meandering of the steel plate 1 has been corrected and the through-plate roll 2 with crown has returned to the origin.

  That is, in this embodiment, when the crown amount Δr becomes small due to roll wear and the generation amount of the meandering correction moment M obtained by the above equation (1) is insufficient, in order to compensate for this, The passage plate roll 2 with crown shifts by ΔXs in the opposite direction to the meandering amount ΔX which is the difference between and the relative meandering amount ΔXr (= ΔX + ΔXs) between the passage plate roll 2 with crown and the steel plate 1. By doing so, a meandering correction moment M sufficient to correct the meandering is generated.

  Similarly, compared with the case where the processing plate threading changes direction, the processing line threading is in a fixed direction, the winding angle θ is small, and the amount of generation of the meandering correction moment M obtained by the above equation (1) is small. In order to compensate for the shortage, the passing plate roll 2 with crown shifts by ΔXs in the direction opposite to the width of the meandering amount ΔX of the steel plate 1, and the relative meandering between the passing plate roll 2 with crown and the steel plate 1 is shifted. By giving the amount ΔXr (= ΔX + ΔXs), a meandering correction moment M sufficient to correct the meandering is generated.

  In this way, in this embodiment, meandering control can be performed in the processing line of the steel plate 1 in consideration of the wear of the passing plate roll 2 with the crown. Regardless of the change, meander control is possible.

1 Steel plate (steel strip)
2 Passing plate roll with crown 3 Passing plate roll bearing mechanism with crown 4 Pressing mechanism 5 Width direction shift mechanism 6 Support roll 7 Meander sensor 11 Information processing device 12 O / C
13 Results Collection Database 14 Meandering Correction Moment Calculation Device 90 Pressing Mechanism 91 Auxiliary Roll 92 Pressing Device 93 Looseness Detection Sensor 94 Control Device

Claims (2)

A meandering control method for a steel plate for controlling meandering of a steel plate,
A single roll with a crown or taper that abuts and passes through a steel plate on one side;
Before and after the place where the single roll is disposed, and support rolls disposed on the surface opposite to the one surface, respectively,
Measure the meandering amount of the steel sheet,
The steel type and dimensions of the steel plate being processed are extracted, and the data obtained by searching the past steel data for the same steel type and dimensions as the steel plate being processed, with the same or similar meandering amount and crown amount. To determine the meandering correction moment required to correct the meandering of the steel plate being processed ,
A set value of the shift amount of the single roll is calculated so as to generate the determined meandering correction moment, and the single roll is shifted in the width direction while being in contact with one surface of the steel plate based on the set value. A meandering control method for a steel sheet, wherein the relative position in the width direction of the single roll and the steel sheet is changed to enable meandering correction. A steel plate meander control device for controlling the meander of a steel plate,
A single roll with a crown or taper that abuts and passes through a steel plate on one side;
Support rolls arranged on the opposite side of the one side before and after the place where the single roll is arranged,
A meandering sensor for measuring the meandering amount of the steel sheet;
O / C in which information on the steel type and dimensions of the steel sheet is recorded,
A performance collection database for storing the actual results of the meandering amount, the crown amount in consideration of roll wear, and the calculated value of the meandering correction moment necessary for correcting the meandering;
From the data stored in the results collection database, search for data in which the meandering amount and the crown amount match or approximate in the same steel type and size as the steel type and size of the steel plate being processed extracted from the O / C. A meandering correction moment calculating device for determining a meandering correction moment necessary for correcting the meandering of the steel plate being processed from the retrieved data ;
An information processing device that calculates a set value of the shift amount of the single roll so as to generate the determined meandering correction moment;
A width direction shift mechanism that shifts the single roll in the width direction,
Based on the set value, the width direction shift mechanism shifts the single roll in the width direction while being in contact with one surface of the steel plate, thereby making it possible to change the relative width direction position of the single roll and the steel plate. Thus, a meandering control device for a steel sheet, which enables meandering correction.

Images