JP2014172059A - Vertical looper facility and metal plate meandering suppressing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical looper facility and a metal plate meandering suppressing method, capable of suppressing effectively meandering of a passing metal plate, even when using a metal plate having a part (specific shape part) having locally a shape different from the periphery such as a weld zone.SOLUTION: A vertical looper facility to be used can adjust the gradient of a roll 11 based on a relation between shape information of a specific shape part and the inclination for suppressing meandering of a metal plate 2 generated when the specific shape part is moved on the rolls 10, 11, when the specific shape part of the metal plate is moved on the rolls.

Description

  The present invention relates to a vertical looper facility and a metal plate meandering suppression method.

  In continuous processing lines such as continuous annealing equipment for steel sheets, hot dip galvanizing equipment, electrogalvanizing equipment, etc., the leading and trailing plates are connected by welding, so that the production line does not stop during welding. A vertical looper equipment is preferably used in a line for continuously processing metal plates such as the above.

  In recent years, there has been a problem that a metal plate being conveyed meanders in a continuous processing line. As a technique for preventing the meandering of the metal plate in the vertical looper equipment, in Patent Document 1, a vertical guide column is erected at the center of the front entrance side and the rear exit side of the looper. A horizontal moving horizontal axis, and a blanket at the center of the front and back of the looper carriage on which horizontal horizontal upper rolls are arranged and the center of the horizontal horizontal weighing rod. It has been proposed to connect to the right and left ends of a carriage up / down chain and a balance bar provided along the four pillars.

  In the technique described in Patent Document 2, first, when the looper carriage is tilted, an inclinometer measures the tilt angle. Next, the measured tilt angle signal is input to the looper carriage tilt correction command means. In this looper carriage inclination correction command means, the allowable inclination angle of the looper carriage is set in advance, and when the difference between the measured inclination angle and the allowable inclination angle exceeds a certain value, the looper carriage inclination correction instruction A command is sent from the means to the looper carriage tilt correcting means, and the tension of the left and right drive chains of the looper carriage is adjusted by the looper carriage tilt correcting means. Further, it has been proposed to maintain the tension of the driving chain in that state when the difference between the measured inclination angle and the allowable inclination angle becomes less than a certain value as a result of adjusting the tension of the driving chain.

  Further, in Patent Document 3, a steel band meandering amount detection device is provided on at least one of the entrance side and the exit side of the vertical looper equipment, and four wire ropes for hanging the looper carriage are provided as separate winding drums and There has been proposed a method of correcting meandering by connecting to a motor and making the length adjustable individually.

Japanese Patent Laid-Open No. 05-263297 Japanese Patent Application Laid-Open No. 08-168819 JP 08-267139 A

  When passing a metal plate through the continuous processing facility, the rear end portion of the preceding metal plate and the front end portion of the subsequent metal plate are connected by welding. If there is a part with a different shape from the surroundings, such as this welded part, large meandering occurs, impeding productivity. In addition, when the preceding process, size, steel type composition, strength level, and the like of the preceding metal plate and the succeeding metal plate are different, very large meandering occurs depending on conditions. In the metal plate meandering suppression methods described in Patent Documents 1 to 3 and the like, meandering caused by a welded portion connecting the preceding metal plate and the succeeding metal plate cannot be effectively suppressed.

  In addition, the tip and rear ends of the metal plate often have poor shapes. Even when the shape of the metal plate is bad, the contact state of the metal plate with the roll is different in the width direction, and meandering is likely to occur.

  When meandering occurs due to a welded portion or the like, the amount of meandering increases and rollout causes the continuous processing line to stop, greatly impairing productivity. Although it is possible to suppress the rollout by slowing the line speed, this method impedes productivity by slowing the line speed. Further, it is possible to suppress meandering by cutting off the defective shape portion at the tip of the subsequent metal plate, but the yield is reduced.

  The present invention has been made in order to solve the above-described problems, and the object thereof is to provide a metal plate having a portion having a locally different shape (hereinafter sometimes referred to as a unique shape portion) such as a welded portion. Even if it is a case where it uses, it is providing the vertical looper installation and the metal plate meandering suppression method which can suppress effectively the meandering of the metal plate passed.

  The inventors of the present invention have made extensive studies to solve the above problems. As a result, when the singular shape part moves on the roll based on the relationship between the shape information of the singular shape part and the inclination to suppress the meandering of the metal plate when the singular shape part moves on the roll. In addition, the present inventors have found that the above problem can be solved by adopting a method of adjusting the degree of inclination of the roll based on the above relationship, and have completed the present invention. More specifically, the present invention provides the following.

  (1) A vertical looper facility in which a metal plate having a unique shape portion is spanned between a plurality of rolls arranged in an upper stage and a lower stage, and the inclination of at least one of the plurality of rolls is adjusted. The meandering control unit for controlling the meandering of the metal plate to be passed, the shape information of the unique shape portion, and the metal plate for suppressing the meandering of the metal plate when the unique shape portion moves on the roll. A vertical looper facility that operates when the singularly shaped portion moves on a roll based on the relationship.

  (2) A meander of a metal plate passed through a vertical looper facility that spans a metal plate between a plurality of rolls arranged in an upper stage and a lower stage, and an inclination of at least one of the plurality of rolls. A method for suppressing meandering of a metal plate that is adjusted and suppressed, based on the relationship between the shape information of the singular shape part and the inclination for suppressing the meandering of the metal plate when the singular shape part moves on the roll. And the metal plate meandering suppression method of adjusting the inclination of the roll based on the relationship when the singular shape portion is moving on the roll.

  According to the present invention, even when a metal plate having a unique shape portion such as a welded portion is used, meandering of the metal plate to be passed can be effectively suppressed.

It is a schematic diagram which shows an example of a peculiar shape part. It is a schematic diagram which shows a mode that the metal plate which does not have a specific shape part moves on a crown roll. It is a schematic diagram which shows a mode that the metal plate which has a specific shape part moves on a crown roll. It is a front view which shows typically the vertical looper installation of this embodiment. It is a side view which shows typically the vertical looper equipment of this embodiment. It is a figure which shows typically the steepness of a metal plate. It is a figure which shows typically the steel plate used by the Example and the comparative example.

  Hereinafter, embodiments of the present invention will be described. In addition, this invention is not limited to the following embodiment.

  The vertical looper equipment and the metal plate meandering suppression method of the present invention are characterized in that the meandering of the metal plate to be passed can be effectively suppressed even if the metal plate has a unique shape part such as a welded part. One.

  The metal plate having a unique shape portion is a metal plate having a convex portion or a concave portion that is swollen from the periphery of a welded portion, a defective shape portion or the like. Here, the defective shape portion means a portion such as an ear extension, a belly extension, or a quarter extension. As a typical welded portion, a welded portion between the rear end portion of the metal plate of the preceding coil and the front end portion of the subsequent coil as shown in FIG. Further, a defective shape portion as shown in FIG. 1 often occurs. Therefore, it is difficult to adjust in advance so that the metal plate does not have the unique shape portion. And when such a convex part and a recessed part exist on a metal plate, as a result of the contact state of a roll and a metal plate becoming non-uniform | heterogenous, the problem that a moving metal plate meanders largely arises.

  This problem will be described more specifically with reference to FIGS. 2 and 3 are diagrams schematically showing a metal plate moving on a roll. The metal plate shown in FIG. 2 is not a metal plate having a unique shape portion, but the metal plate shown in FIG. It is a metal plate which has. Moreover, in the vertical looper equipment of the continuous processing equipment, in order to suppress meandering, a crown roll having an inclined surface as shown in FIGS. 2 and 3 is often used as a roll. When the metal plate meanders, the crown roll prevents the meandering by a force (arrow in the figure) that brings the metal plate toward the center (FIG. 2). However, when the shape of the metal plate is poor, the contact area with each roll is different in the width direction, the balance of the forces is lost, and meandering occurs (FIG. 3). And depending on the case, big problems, such as roll-out of a metal plate, arise.

  According to the following vertical looper equipment and metal plate meandering suppression method of the present invention, meandering of the metal plate can be suppressed even when the metal plate having the unique shape portion as described above is passed.

  The vertical looper facility of this embodiment will be described. FIG. 4 is a side view schematically showing the vertical looper facility of the present embodiment. FIG. 5 is a front view schematically showing the vertical looper facility of the present embodiment.

  The vertical looper facility 1 of the present embodiment includes a fixed roll 10, a looper roll 11, a looper carriage 12, a wire rope 13, a carriage tilting device 14, a storage unit 15, and a shape detection device 16. . In the vertical looper facility 1 of the present embodiment, the steel plates 2 are alternately passed between the fixed roll 10 and the looper roll 11. In the present embodiment, the steel plate 2 corresponds to the metal plate of the present invention.

  The fixed roll 10 is a roll for moving the steel plate 2 along a desired path together with the looper roll 11 and indicates a fixed one. In the present embodiment, the plurality of fixed rolls 10 are arranged so as to be aligned horizontally. The fixed roll 10 may be attached to, for example, a rectangular parallelepiped base frame (not shown) surrounding the looper facility 1. In the present embodiment, the fixed roll 10 corresponds to a roll disposed in the lower stage of the present invention.

  The looper roll 11 is a roll for moving the steel plate 2 along a desired path together with the fixed roll 10, and is attached to the looper carriage 12. In the present embodiment, the plurality of looper rolls 11 are arranged so as to be arranged horizontally. Since the looper roll 11 is attached to the looper carriage 12, the degree of inclination can be adjusted as will be described later. In addition, the looper roll 11 hits the roll arrange | positioned at the upper stage of this invention.

  The looper carriage 12 has a flat plate shape, and a plurality of looper rolls 11 are arranged on one side. In the looper carriage 12, wire ropes 13 are attached to the four corners of the surface on which the looper roll 11 is disposed. The looper carriage 12 is connected to the carriage tilting device 14 via the wire rope 13.

  Four wire ropes 13 are provided at four corners of the carriage tilting device 14, and connect the looper carriage 12 and the carriage tilting device 14. In the present embodiment, a part of the four wire ropes 13 can be accommodated in the carriage tilting device 14, and the distance between the looper carriage 12 and the carriage tilting device 14 can be adjusted by adjusting the accommodation amount. Is adjustable.

  The carriage tilting device 14 is provided at four positions directly above the four corners of the looper carriage 12 and changes the length of the four wire ropes 13 to displace the looper carriage 12. For example, the carriage tilting device 14 may have a winding drum that winds the wire rope 13, a motor that drives the winding drum, and a control unit that controls the motor to adjust the winding amount of the wire roll 13. Further, as described below, the carriage tilting device 14 selects an appropriate slope from the relationship stored in the storage unit 15 based on the shape information of the singular shape portion obtained from the shape detection device 16, and the singular shape portion When moving on the roll, the inclination of the roll can be adjusted. As described above, the carriage tilting device 14 winds the wire rope 13 and adjusts the degree of tilting of the roll, so that the carriage tilting device 14 corresponds to the meandering control unit of the present invention.

  The memory | storage part 15 points out what memorize | stored the relationship between the shape information of the specific shape part of the steel plate 2, and the inclination for suppressing the meandering of the steel plate 2 when a specific shape part moves on a roll. The storage unit 15 is connected to the carriage tilting device 14, and the data stored in the storage unit 15 is used when the carriage tilting device 14 adjusts the tilt of the roll.

  The “shape information of the singular shape portion” is preferably expressed by the same standard for all types of shapes. For example, as a preferable criterion, steepness can be mentioned. The steepness is an index representing the shape of the metal plate, and here refers to an observation of the state of waves generated in the steel plate 2 in the width direction of the steel plate 2. Specifically, as shown in FIG. 6, it can be expressed by steepness = H / L × 100.

  In the present embodiment, for example, the relationship between the steepness and the slope for reducing the meandering amount of the metal plate when having a predetermined steepness is obtained, and the storage unit 15 has this relationship. Here, the relationship between the steepness and the slope may be derived by actual measurement, or may be derived by calculation or simulation. Further, the steepness and the inclination may be made to correspond one-on-one, but the range of the steepness and a predetermined inclination may be made to correspond. By doing in this way, a relationship can be derived | led-out easily and the data amount which a memory | storage part memorize | stores can also be reduced.

  The shape detection device 16 detects the shape information of the unique shape portion existing on the steel plate 2 from the steel plate 2 to be passed. The shape detection device 16 is connected to the carriage tilting device 14, and the shape information detected by the shape detection device 16 is used by the carriage tilting device 14 to determine data to be used from the data stored in the storage unit 15. Is done.

  Next, the effect of the present invention will be described.

  In the present embodiment, shape information on the steel plate 2 to be passed is detected by the shape detection device 16, and the detected information is sent to the carriage tilting device 14. Next, the carriage tilting device 14 selects appropriate data from the storage unit 15 based on the shape information. Next, the carriage tilting device 14 adjusts the tilting degree of the looper roll 12 when the unique shape portion moves on the looper roll 11. Thus, in this embodiment, when the specific shape part of the steel plate 2 is moving the looper roll 11, the specific shape part moves the looper roll 11 in order to adjust the inclination of the looper roll 11. Suppresses the occurrence of meandering. As described above, according to the present embodiment, means for preventing meandering is taken before meandering, so that meandering of the steel plate 2 hardly occurs.

  Further, in the case of a specific shape portion that may cause a particularly large meandering such as a welded portion, the conventional method may cause a rollout immediately after the meandering occurs. However, according to the present embodiment, it is possible to prevent the meandering itself by taking a means for preventing meandering before meandering, so that serious problems such as rollout can be effectively suppressed.

  Further, even if the unique shape portion causes a small meander, it can be prevented in advance that a large meander is caused, for example, by a small meander continuously occurring many times.

  As described above, the looper facility of the present embodiment has been described, but the present invention may be a facility or method for adjusting the degree of inclination of the lower roll.

  Using the vertical looper facility shown in FIG. 4, the present invention was implemented and evaluated as follows.

  In FIG. 7, the steel plate of the front process used before Example 1 and 2 and the comparative example 1 before entering into the looper roll 11 was shown. A welded portion exists at the rear end of the steel plate. The welded portion of the steel plate used in Example 1 and Comparative Example 1 and the welded portion of the steel plate used in Example 2 have different shapes.

Before transporting the steel plate, first, the relationship between the shape information of the unique shape portion on the steel plate and the inclination to suppress meandering that occurs when the unique shape portion moves on the roll was estimated in a proportional relationship. . In the present embodiment, the shape information indicates a difference in steepness. For each steel plate, the measurement position of the steepness is a position of width × 1/4 in the width direction from the center in the width direction (see FIG. 7) (as shown in FIG. 7, from the rear end where the welded portion is present). Shape information up to 100 m was acquired toward the tip). As shown in FIG. 7, since shape information at two locations is acquired for each position in the width direction, the difference in steepness was calculated from the steepness at these two locations. Table 1 shows the difference in steepness. About the steel plate which has a welding part, the difference of the steepness in a welding part became large. In the facility in which the present embodiment was implemented, it has been found by prior investigation that if the difference in steepness is known, the slope can be obtained from the following equation.
Inclination (mm) = Steepness difference (%) × 100/3
About these steel plates, while conveying the steel plates, the shape information at the position of width × 1/4 in the width direction (see FIG. 7) was continuously acquired from the center in the width direction.

  For the examples, the inclination was determined based on the relationship derived in advance, and the inclination is shown in Table 1. In the example, when the welded part moves on the looper roll, the looper carriage is inclined to suppress meandering of the steel sheet. In Comparative Example 1, the looper carriage was not inclined. About the Example and the comparative example, the amount of meandering was measured with the meandering amount measuring apparatus. The results are shown in Table 1. Further, in the case of a steel plate having no welded portion, the difference in steepness was 0%, and the amount of meandering was 10 mm without tilting the looper carriage.

  In the present invention, even in the case of a steel plate having a poor width direction steepness difference of 0.6%, the meandering amount becomes 9 mm by setting the carriage inclination amount to 20 mm when the welded portion passes through the looper roll, and the welded portion is It was possible to obtain an effect of suppressing the amount of meandering below that in the case of no. Even when the width direction steepness difference was 0.3%, the effect of suppressing the meandering amount to 7 mm was obtained by setting the carriage inclination amount to 10 mm.

DESCRIPTION OF SYMBOLS 1 Vertical looper equipment 10 Fixed roll 11 Looper roll 12 Looper carriage 13 Wire rope 14 Carriage tilting device 15 Memory | storage part 16 Shape detection apparatus 2 Steel plate

Claims (2)

A vertical looper facility that spans a metal plate having a unique shape portion between a plurality of rolls arranged in an upper stage and a lower stage,
A meandering control unit that adjusts the inclination of at least one of the plurality of rolls to control the meandering of the metal plate to be passed through;
A storage unit that stores the relationship between the shape information of the singular shape part and the inclination to suppress the meandering of the metal plate when the singular shape part moves on a roll;
The meandering control unit is a vertical looper facility that operates when the unique shape part moves on a roll based on the relationship. Adjusting the inclination of at least one of the plurality of rolls, meandering the metal plate that is passed through a vertical looper facility that spans the metal plate between a plurality of rolls arranged in the upper stage and the lower stage A metal plate meandering suppression method
Based on the relationship between the shape information of the singular shape portion and the inclination for suppressing the meandering of the metal plate when the singular shape portion moves on the roll,
A metal plate meandering suppression method for adjusting the degree of inclination of the roll when the unique shape portion is moving on the roll.

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