JP4192116B2 - Metal strip shape controller - Google Patents

Description

  The present invention relates to a metal band shape control apparatus that measures the shape of a metal band, such as warp, in a non-contact manner and corrects the shape of the metal band in a non-contact manner.

    Maintaining the shape of the metal band in a metal band production line without warping is an important factor that not only improves the quality of the metal band, but also improves the efficiency of the production line. is there.

  FIG. 12 is a diagram showing a configuration of a production line for a molten zinc-plated metal strip.

  The metal strip 70 conveyed from the previous process is first annealed and reduced in the heating furnace 71, and then passed through the molten zinc pot 72 while being immersed in the molten zinc.

  And the amount of plating adhesion is adjusted by squeezing the plating adhering to the metal band with the gas ejected from the wiping nozzle 73 installed after the molten zinc pot 72.

  In the alloying furnace 74, which is a subsequent process, an alloying layer of Fe and zinc of a metal strip is formed, cooled in a cooling zone 75, subjected to special rust prevention and corrosion resistance treatment in a chemical conversion treatment 76, and wound around a coil. Shipped. In addition, when alloying, chemical conversion treatment is often not performed.

  FIG. 13 is a diagram illustrating a positional relationship between the wiping nozzle and the metal band as viewed from the upstream side of the metal band.

  A wiping gas 77 is ejected from the wiping nozzle 73 in the form of a slit so that pressure is uniformly applied to the front and back of the metal strip 70 in the plate width direction. Therefore, when the metal band 70 is warped as shown in FIG. 13, the pressure of the wiping gas is not uniform because the distance from the metal band is different, and unevenness in the amount of adhesion occurs in the width direction of the metal band. Will do.

  As a method for solving this problem, a technique for correcting the shape of a metal band in a non-contact manner using an electromagnet is known.

  FIG. 14 is a diagram illustrating the configuration of a conventional metal band shape control device.

  In this technology, the shape of the metal band is measured by a non-contact position sensor 78 installed in the width direction of the metal band 70, and the electromagnet 79 installed in the width direction of the metal band 70 is used to measure the metal band 70. By applying the suction force 80, it is intended to correct shape defects such as warping of the metal band 70 (see, for example, Patent Document 1).

  FIG. 15 is a diagram showing another configuration example of a conventional metal strip shape control device.

  In this embodiment, a plurality of electromagnets 79 are arranged on a gantry 81, and the gantry 81 is moved in the width direction of the metal strip 70 so as to correspond to the meandering of the metal strip 70 (for example, Patent Document 2).

  FIG. 16 is a diagram showing another configuration example of a conventional metal band shape control device.

In this embodiment, a plurality of paired front and back electromagnets 79 are arranged in a region including the maximum width of the metal strip 70 to be passed, and the electromagnet 79 that controls the metal strip 70 is switched and used according to meandering and width change. (For example, refer to Patent Document 3).
JP-A-6-25814 Japanese Utility Model Publication No. 5-30148 JP-A-7-256341

  However, when the technique described in Patent Document 1 is applied to shape control of a metal strip of an actual machine, when the width of the metal strip 70 to be controlled is changed in the production line or the processing line, The control device must be configured to cope with the case of meandering while passing through the plate.

  Further, in the configuration of the technique described in Patent Document 2, a moving mechanism for the gantry 81 and a control device for the moving mechanism are required, and costs are required for the installation.

  Further, by moving the electromagnet 79, Zn powder generated in this environment and deposited on the apparatus is scattered, and as a result, the Zn powder adheres to the metal strip 70 and the quality of the metal strip 70 is deteriorated (defective product). Occurrence).

  Furthermore, the provision of the moving mechanism in an environment where molten zinc of 400 to tens of degrees is present has a problem that the moving mechanism is likely to break down due to the influence of heat.

  In the configuration of the technique described in Patent Document 3, since a large number of electromagnets 79 are installed, not only the installation cost of the electromagnets 79 but also an installation table having a structure capable of withstanding the weight of the electromagnets 79 must be provided, which requires a large amount of cost. There is a problem.

  Thus, when it is going to apply a prior art to an actual machine, it is necessary to reduce the expense required for installation of an electromagnet.

  The present invention has been made in view of such circumstances, and an object thereof is to provide an inexpensive metal band shape control apparatus that can cope with meandering and width change of the metal band 70.

The present invention is provided in a production line for an alloyed hot-dip galvanized metal strip, and has a shape control for an alloyed hot-dip galvanized metal strip whose shape is controlled by passing a contact roll. A metal strip which is provided at a position after the molten zinc bath and is installed corresponding to the direction of warpage determined in advance by the characteristics of each line such as the arrangement of rolls, and has a maximum production width. When the maximum plateable area that is the area occupied in the width direction of the line is Wa, and the minimum plateable area that is the area that the metal strip having the minimum production width occupies in the width direction of the line is Wb. The first electromagnet group including one or more electromagnets provided in the vicinity of the central portion in the band width direction on the opposite side of the C-shaped protruding side and in the Wb region, and provided at a position after the molten zinc bath Roll placement Each is a thing which is installed corresponding to the direction of advance determined warping by the characteristics of the line, the side projecting into the substantially C-shaped, than the central portion excluding the Wb region from Wa region of the strip width direction and one or more electromagnets on the right side of the region, and a second electromagnet group than the center portion of Wb region provided so as to include a single electromagnet on the right position, the side projecting into the substantially C-shaped Thus, one or more electromagnets are included in a region on the left side of the central portion excluding the Wb region from the Wa region in the band width direction, and one electromagnet is included in a position on the left side of the central portion in the Wb region. and a third electromagnet group provided a control device for shape control of the metal strip so as to reduce the more warped of the substantially C-shaped in the first to third electromagnet group, wherein the metal strip is an electromagnet After passing, the metal strip is in a position before being charged into the alloying furnace. And a one or two vibration suppression role of making contact with one side or both sides that, in the side opposite to the side projecting the substantially C-shaped, and at two positions sandwiching the center of the strip width direction The shape control device for an alloyed hot-dip galvanized metal strip is characterized in that no electromagnet is disposed in a region excluding the Wb region from the Wa region .

  By applying the present invention, the number of correction devices installed can be reduced without newly providing special equipment, so that the metal band shape control device can be configured at low cost.

  FIG. 1 is a diagram showing a configuration of a metal strip shape control apparatus according to the first embodiment of the present invention.

  The metal band shape control device includes a position sensor 2 arranged in the width direction of a metal band 1 that moves upward in the figure, a controller 3 that receives a signal from the position sensor 2 and outputs a control signal, and a control signal. It is comprised of a plurality of electromagnets 5 that are selected by a switch 4 that switches the output destination and the switch 4 and corrects the shape of the metal strip by a control signal from the controller 3.

  FIG. 2 is a diagram showing the arrangement of the electromagnets 5 as viewed from the upstream side of the metal strip 1.

  The electromagnet 5 is mainly divided into three regions: a central region 6a on the concave side of the metal band 1, one end region 6b on the convex side of the metal band 1, and the other end region 6c on the convex side of the metal band 1. Has been placed.

  Now, let Wa be the maximum plateable area, which is the area occupied in the width direction of the line when the metal band 1 having the maximum production width passes through the line while meandering, and the metal band 1 having the minimum production width meanders. Let Wb be the minimum plateable area, which is the area occupied in the line width direction when the line is passed through.

  The central area 6a is provided in an area defined by Wb, and one or more electromagnet groups 5a are installed in the central area 6a. Further, the end regions 6b and 6c are provided in regions at both ends excluding the region defined by Wb from the region defined by Wa, and each of the end regions 6b and 6c is an electromagnet in which a plurality of electromagnets are arranged. Groups 5b and 5c are installed.

  Furthermore, in order to control the shape of the minimum plate width, one electromagnet 5d and 5e is respectively installed at both ends on the convex surface side of the metal band 1 in the region defined by Wb. In the following description, the electromagnet 5d is included in the electromagnet group 5b, and the electromagnet 5e is included in the electromagnet group 5c.

  FIG. 3 is a diagram for explaining the cause of warping of the metal strip 1.

  The metal strip 1 is bent at the time of roll contact by the roll 7 installed in the molten zinc pot, and then subjected to stress that is bent back when the metal strip 1 leaves the roll 7, so By bending and bending back, tensile stress and compressive stress are applied in both the longitudinal direction and the width direction.

  At a position 8 immediately before leaving the roll 7, a tensile stress 8 a acts on the surface of the metal strip 1 in contact with the roll 7, and a compressive stress 8 b acts on the opposite surface.

  Accordingly, at the position 9 where the metal band 1 is separated from the roll and the restraining force is lost, the tensile stress is released on the surface of the metal band 1 that is in contact with the roll 7 and a force 9a is applied to return to the original state. It is considered that a warp in which the cross section of the metal strip 1 is substantially C-shaped occurs due to the stress distribution because a force 9b is applied to release the compressive stress and return to the original surface.

  For this reason, in the process in which the metal band 1 conveyed in the metal band production line or the metal band processing line is bent and unbent by the roll, the above-described warpage may always occur, and the warp etc. may occur. In this case, considering the generation mechanism of the warp, the direction of the warp is often determined by the characteristics of each line such as the arrangement of the rolls.

  Therefore, when the electromagnet is arranged, it can be installed at a position suitable for a predetermined warp shape. The arrangement of the electromagnet is based on this knowledge and consideration.

  That is, the electromagnet does not need to be disposed on the entire surface of the metal band 1 and the entire back surface. The first electromagnet group is provided in the vicinity of the central portion in the band width direction on the opposite side of the substantially C-shaped protruding side. The second and third electromagnet groups are arranged at two positions sandwiching the central portion in the band width direction on the protruding side, and the attraction force of each electromagnet group is applied to the metal band 1 to form a substantially C-shaped warp. It becomes possible to control the shape to a flat shape.

  Next, the operation of the metal strip shape control apparatus having the above configuration will be described.

  When manufacturing the metal strip 1, the operator changes the position of the position sensor 2 in accordance with the width of the metal strip to be manufactured. Specifically, the position in the width direction of the position sensor 2 is adjusted so that the position sensor 2 is positioned at the center and both ends of the metal strip 1.

  Further, the operator selects one or more electromagnets for shape control from the electromagnet groups 5a, 5b, and 5c in accordance with the width of the metal strip to be manufactured. One or more units were selected in order to correct the warp so that the range where the electromagnetic force should be applied can be set appropriately according to the attributes such as the thickness of the target material. It is not limited to selecting. When the operator operates the switch 4 based on the selection result, the circuit inside the switch 4 is switched so that a control signal is sent to the selected electromagnet.

  In the apparatus configured as described above, the position signal of the metal strip 1 measured by the position sensor 2 is input to the controller 3 to perform control calculation, and the resulting control signal is selected via the switch 4. The shape is controlled by being sent to the electromagnet 5.

  When the metal band 1 meanders, the operator may confirm the meandering visually, etc., readjust the position sensor 2 and reselect the electromagnet 5, and then resume shape control.

  Here, the switching method of the switch 4 can be configured by either an automatic method or a manual method. For example, when switching automatically, it may be configured to automatically detect the width of the metal band or the occurrence of meandering, and select an electromagnet according to a predetermined pattern corresponding to the width.

  According to the metal strip shape control device having such a configuration, the number of installed electromagnets can be greatly reduced to about half or less of the conventional number.

  Note that the control of the electromagnet 5 can be realized by a manual operation by an operator, instead of an automatic process using the controller 3. In this case, the operator can obtain a desired result by operating the electromagnet 5 so as to correct the shape while monitoring the output of the position sensor 2 with a display (not shown).

  In the configuration of the prior art, the visual observation by the operator was hindered because the electromagnets 5 were arranged without gaps. However, in this configuration, the number of electromagnets decreased, so that monitoring can be easily performed and manual operation is possible. It has become.

  In the present embodiment, the shape of the metal strip is controlled using the electromagnet 5, but a fluid pressure pad may be used instead of the electromagnet 5. The fluid pressure pad has a structure for ejecting fluid from its outlet, and the metal band 1 is pressed by the pressure of the ejected fluid to correct the shape.

  The electromagnet 5 has an action of attracting the metal strip, whereas the fluid pressure pad is different only in that it exerts an action of pushing out the metal strip. Therefore, the installation position of the fluid pressure pad and the installation of the electromagnet 5 are different. The same shape control can be performed by arranging the fluid pressure pad at a position where the position is symmetrical with respect to the metal strip 1.

  By using the fluid pressure pad, the present control device can be applied even in an environment or object where the magnet cannot be used, for example, when the object is not a ferromagnetic material.

  However, when the electromagnet and the fluid pressure pad are compared, the electromagnet is preferable in realizing the present invention. The reason is as follows. (1) When an aerodynamic actuator is used on a molten metal bath, the metal band is unnecessarily cooled by the air flow, which may cause quality problems. (2) The apparatus is larger than the electromagnet, and it is difficult to install it directly above the wiping nozzle 11. Moreover, since the piping and the blower take up space, the actual implementation is difficult. (3) The required power is larger than the electromagnet and the running cost is increased.

  FIG. 4 is a block diagram showing a second embodiment of the shape control apparatus according to the present invention. In the figure, the same parts as those in FIG. 1 or 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

  This shape control device includes a shape sensor 10 disposed on a side surface of a metal strip 1 that moves upward in the figure, a controller 3 that receives a measurement signal from the shape sensor 10 and performs a control calculation and outputs a control signal, The switch 4 is configured to send a signal to the electromagnet 5 at a predetermined position, and a plurality of electromagnets 5 that correct the shape of the metal band by this control signal.

  FIG. 5 is a diagram showing the arrangement of the shape sensor and the electromagnet as viewed from the upstream direction of the metal strip.

  The shape sensor 10 includes a light projector 10 a installed on the side surface of the metal strip 1 and a light receiver 10 b installed on the side surface facing the light projector 10 a. Although not shown, if necessary, a gas purge device is provided to arrange the imaging optical path.

  Further, as described with reference to FIG. 2, the electromagnet 5 is disposed in three regions, that is, a central region 6 a on the concave surface side of the metal band 1 and both end regions 6 b and 6 c on the convex surface side of the metal band 1.

  Next, the operation of the shape control apparatus having the above configuration will be described.

  Parallel light is emitted from the projector 10a. Since the metal band 1 blocks this light, a shadow and light of the metal band 1 are generated on the light receiver 10b. As shown in FIG. 5, the width of the shadow is formed corresponding to the degree of warping of the metal strip 1, and this width is grasped by observing the position X1 and the position X2 which are both end points of the shadow on the light receiver 2b. can do.

  The light receiver 2b transmits the measured position X1 and the position X2 to the controller 3. The controller 3 corrects the shape of the metal strip 1 by controlling the plurality of electromagnets 5 based on the position X1 and the position X2.

  FIG. 6 is a flowchart showing the control contents of the controller.

  The controller 3 selects an electromagnet to be controlled first from a plurality of electromagnets 5 according to a predetermined order (S1). Next, it is checked whether or not the position X1 and the position X2 transmitted from the light receiver 10b are both within a predetermined range (S2). If both values are within a predetermined range, the amount of warping of the metal strip 1 is small and no correction is necessary, so that the control operation is not performed and the apparatus waits in the initial state. If any of the values is out of the predetermined range, the warping amount of the metal strip 1 is large and needs to be corrected, so the control operation of the next step is started.

  First, an output with a predetermined control signal added is performed on the selected electromagnet 5 (S3). In parallel with the output operation to the electromagnet 5, the output values of the shape sensor 2, that is, the position X1 and the position X2, are read, and whether the position X1 or the position X2 has moved in a direction to reduce the deviation from the predetermined target value. Check (S4).

  When the position of the metal strip 1 moves so as to reduce the deviation, a predetermined amount of control signal is added to the electromagnet 5 and output (S5).

  As a result of the output, when the position of the metal band 1 does not change or the position of the metal band 1 moves so that the deviation from the target position of the metal band 1 increases, the electromagnet 5 is fixed and changed at the current output. Is not performed (S6).

  It is checked whether or not the above procedure is performed for all the electromagnets 5 (S7). If not performed for all the electromagnets 5, the next electromagnet is processed (S8). If it is carried out for all the electromagnets 5, the process returns to the initial state, and processing is performed in the same procedure from the first electromagnet 5.

  Note that the control of the electromagnet 5 can be realized by a manual operation by an operator, instead of an automatic process using the controller 3.

  In this case, the operator operates the controller 3 according to the procedure described with reference to FIG. 6 while monitoring the position X1 and the position X2 transmitted from the light receiver 10b by a display (not shown), and switches each electromagnet 5 A desired result can be obtained by outputting a signal to be controlled.

  As described above, if the shape control device is configured to measure the warpage of the metal strip in a non-contact manner from the side of the metal strip and control based on the value, it could not be measured due to limitations on the conventional equipment. Since the warpage of the part to be controlled can be directly measured, the shape can be controlled with high accuracy. In the present embodiment, the combination of the projector 10a and the light receiver 10b is used as the shape sensor 10. However, an imaging camera may be used as an optical measuring device instead. An example of control when using an imaging camera is as follows. First, the imaging results are subjected to image processing to calculate the positions X1 and X2. The process of FIG. 6 is executed based on the positions X1 and X2. Alternatively, appropriate control is performed such that the distance between the positions X1 and X2 is shortened by adjusting the output of each electromagnet 5.

  FIG. 7 is a block diagram showing a third embodiment of the shape control apparatus according to the present invention. In this figure, the installation position and the number of installation of the electromagnet 5 are different from those of the first and second embodiments.

  As described with reference to FIG. 3, considering the warp generation mechanism of the metal strip 1, the warp direction of the metal strip 1 is determined by the characteristics of each line such as the arrangement of the rolls. Both ends of the metal strip 1 warp in the direction of the roll 7 installed in the molten metal bath 12, and the central portion of the metal strip 1 becomes a substantially C shape warped in the opposite direction of the roll 7.

  In order to control this substantially C shape to a flat shape, as shown in FIG. 1, a first electromagnet group is provided in the vicinity of the central portion in the band width direction on the side opposite to the side protruding in a substantially C shape, What is necessary is just to arrange | position the 2nd and 3rd electromagnet group in two positions which pinch | interpose the center part of the band width direction of the side which protruded in the substantially C shape, and to make the attraction force of each electromagnet group act on the metal band 1.

  By the way, in the line shown in this figure, the metal band 1 moving in the vertical direction has a tension acting in the vertical direction which is the traveling direction thereof. In this case, a restoring force for returning the metal band 1 to the original position is applied.

  For this reason, the attractive force of the 2nd and 3rd electromagnet group arrange | positioned at the both ends of the metal strip 1 acts locally only on both ends of the metal strip 1, and as a result, it is arranged in the central portion. In many cases, the substantially C shape of the metal strip 1 can be made flat without operating one electromagnet group.

  The present embodiment is configured based on the characteristics of such lines, and as shown in FIG. 8, the electromagnet group is arranged only at both ends of the metal strip 1 on the protruding side of the substantially C shape. According to the present embodiment, the shape of the metal strip 1 can be controlled to be flat even with a configuration in which the number of electromagnets is further reduced as compared with the first and second embodiments.

  FIG. 9 is a block diagram showing a fourth embodiment of the shape control apparatus according to the present invention. This configuration is different from the third embodiment in that a touch roll 13 that presses the metal strip 1 from the surface opposite to the roll 7 is disposed downstream of the electromagnet 5.

  This touch roll 13 is installed for the purpose of suppressing the vibration of the metal strip 1 and stabilizing the pass line, and is not shown in the case of manufacturing an alloyed hot-dip galvanized material such as an automobile outer plate, for example. This equipment is often used with alloying furnaces. Normally, it is not preferable to arrange equipment that comes into contact with the metal strip 1 immediately after plating. However, in the production of an alloyed hot-dip galvanized material, an alloying process is performed at a later stage of plating. The influence of the contact level disappears to an invisible level by this alloying treatment.

  Here, the touch roll 13 is arranged only on the surface opposite to the roll 7 because the force is applied to the metal strip 1 from the roll 7 side to the electromagnet 5 side by the attractive force of the electromagnet 5. Therefore, the touch roll 13 is provided on the side receiving this force to restrain the metal strip 1 from vibration.

  In addition, the form which uses one touch roll 13 is not limited to this form. Even when only one touch roll 13 is provided on the side opposite to the electromagnet 5, the vibration suppressing effect can be exhibited by arranging the touch roll 13 so as to be pushed into the metal strip 1. This is because the contact point between the touch roll 13 and the metal band 1 becomes a vibration node, and the situation is the same as when pressing with the pair of front and back touch rolls 13. That is, the form which comprises the touch roll 13 by one is materialized even if it provides in any side of the surface of the metal strip 1, or a back surface.

  According to the present embodiment, since vibration of the metal strip 1 can be suppressed by the touch roll 13, a metal strip shape control device with higher stability can be provided.

  FIG. 10 is a block diagram showing a fifth embodiment of the shape control apparatus according to the present invention. This configuration differs in that the touch roll 13 is arranged on the front and back surfaces of the metal strip 1 in the fourth embodiment.

  In the present embodiment, there is a demerit that the touch roll 13 comes in contact with both the front and back surfaces of the metal band 1, but the metal band 1 can be more reliably restrained, so that in terms of vibration suppression, the fourth embodiment is more effective. Is also excellent.

  Thus, depending on the characteristics of the line, by using the touch roll 13 having the above-described configuration, it is possible to configure a more stable metal band shape control device that can also suppress the vibration of the metal band 1.

  Regarding the configuration of the touch roll 13, an optimal form may be selected from both the viewpoint of the quality of the metal strip 1 and the viewpoint of operation stability. In general, in terms of quality, one touch roll is arranged on the electromagnet 5 side, two touch rolls are arranged, and one touch roll is arranged on the opposite side of the electromagnet 5 in this order. From the viewpoint of operational stability, two touch rolls are arranged, one touch roll is arranged on the electromagnet 5 side, and one touch roll is arranged on the side opposite to the electromagnet 5 in this order.

  The present invention can be applied under various combinations of the roll 7, the electromagnet 5, and the touch roll 13 as described above, and can be configured flexibly in accordance with the manufacturing form of the metal strip 1.

  FIG. 11 is a diagram showing an example in which the shape control device of the present invention is applied to a metal strip coating line.

  The metal strip 30 transported from the previous process is first subjected to combustion removal of oil and fat on the surface of the metal strip in the pretreatment furnace 31, and then coated on the front and back surfaces in the coater 32. Subsequently, in order to dry the paint, it is heated in an oven 33, and then wound around a coil and shipped.

  In the process of the above configuration, since the paint is not dried until it leaves the oven 33 after coating by the coater 32, a roll for supporting and guiding the moving metal strip is not provided. Accordingly, when the metal band is warped in the oven 33, the quality may be deteriorated due to drying unevenness. However, since the inside of the oven 33 is at a high temperature and an environmental measure is required to install a measuring instrument for measuring warpage of a metal strip according to the prior art in the oven, it has been difficult to implement.

  In this application example, a part of the oven 33 is made of a transparent heat-resistant material, the amount of warpage of the metal strip is measured from the side surface through the heat-resistant material, and a non-contact type installed before and after the oven 33 based on the measurement result. The shape correction device is configured to control the shape of the metal strip.

  As described above, the present invention is widely applied to metal strip production lines and processing lines such as continuous molten zinc plating lines, coating lines, continuous electric plating lines, continuous annealing lines, various preheating furnaces and heat treatment furnaces for metal bands. be able to.

  Moreover, according to the structure of each embodiment demonstrated above, a various effect can be acquired.

  By applying the present invention, the number of correction devices installed can be reduced without newly providing special equipment, so that the metal band shape control device can be configured at low cost.

  Further, since the number of correction devices installed can be reduced, the operator can easily visually confirm the portion of the metal band to be controlled and can directly operate the correction devices. For this reason, a metal strip shape control apparatus can be comprised further cheaply.

  In addition, if the apparatus is configured in combination with means for measuring the shape of the metal band from the side surface of the metal band, the portion of the metal band to be controlled can be measured with high accuracy, so that the shape of the metal band can be controlled with high accuracy. it can.

  In addition, this invention can also be specified as the following structures.

  The present invention provides a measuring device that is installed in a metal band manufacturing line or a processing line and measures a shape including warpage of a metal band that is running online without contact, and a metal band based on a measurement value of the measuring device. A metal band shape control apparatus comprising: a control device that outputs a signal for correcting a shape; and a correction device that corrects the shape of the metal band online based on a signal output from the control device. One or more units installed in the minimum plate-passable area, which is the area occupied in the width direction of the line when the metal band having the minimum production width passes through the line, facing the first surface of the metal band The first electromagnet group consisting of the electromagnets and the back surface of the first surface of the metal strip, and the metal strip having the maximum production width is the area occupied in the line width direction when the line passes through the line. Excludes the minimum plateable area from the plateable area A second electromagnet group composed of one or more electromagnets installed in the region and a back surface of the first surface of the metal strip, one each disposed at both end portions in the minimum plate-through region It is a metal strip shape control apparatus provided with the 3rd electromagnet group.

  The present invention also provides a measuring device that is installed in a metal band manufacturing line or processing line and measures the shape including warpage of the metal band that is running online without contact, and a metal band based on the measurement value of the measuring device. A metal band shape control apparatus comprising: a control device that outputs a signal for correcting the shape of the metal strip; and a correction device that corrects the shape of the metal band online based on a signal output from the control device. The device is installed in the minimum plate-passable area that is the area that occupies the width direction of the line when the metal band having the minimum production width passes through the line, facing the first surface of the metal band. The first fluid pressure pad group consisting of the above fluid pressure pads and the metal strip having the maximum production width facing the back surface of the first surface of the metal strip occupy in the line width direction when the line passes through the line. From the maximum area where the plate can be passed A second fluid pressure pad group composed of one or more fluid pressure pads installed in an area excluding the plate-passable area and the rear surface of the first surface of the metal strip, and within the minimum plate-passable area It is a metal strip shape control apparatus provided with the 3rd fluid pressure pad group arrange | positioned one each at the both ends.

  Further, according to the present invention, in the metal band shape control device described above, the measuring device is disposed on one side surface of the metal band, and is disposed on the other side surface facing the light projector that emits parallel light and the metal band projector. A metal band shape control device including a light receiver that receives a projection shape that is a shadow of the metal band from a projector.

  The present invention is the metal band shape control device described above, wherein the control device outputs a signal for correcting the shape of the metal band by manual operation.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

1 is a configuration diagram of a metal strip shape control device according to a first embodiment of the present invention. FIG. The figure which shows arrangement | positioning of the electromagnet seen from the upstream direction of the metal strip. The figure explaining the cause which curvature generate | occur | produces in a metal strip. The block diagram which shows 2nd Embodiment of the shape control apparatus which concerns on this invention. The figure which shows arrangement | positioning of the shape sensor and electromagnet seen from the upstream direction of the metal strip. The flowchart which shows the control content of the metal strip shape control apparatus of this invention. The block diagram which shows 3rd Embodiment of the shape control apparatus which concerns on this invention. The figure which shows the structure of the electromagnet of the shape control apparatus which concerns on this invention. The block diagram which shows 4th Embodiment of the shape control apparatus which concerns on this invention. The block diagram which shows 5th Embodiment of the shape control apparatus which concerns on this invention. The figure which shows the example which applied the shape control apparatus of this invention to the coating line of the metal strip. The figure which shows the structure of the manufacturing line of a hot-dip galvanized metal strip. The figure which shows the positional relationship of the wiping nozzle and metal strip seen from the upstream direction of the metal strip. The figure explaining the structure of the conventional metal strip shape control apparatus. The figure which shows the other structure of the conventional metal strip shape control apparatus. The figure which shows the other structure of the conventional metal strip shape control apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Metal band, 2 ... Position sensor, 3 ... Controller, 4 ... Selector, 5 ... Electromagnet, 5a ... Electromagnet group, 5b ... Electromagnet group, 5c ... Electromagnet group, 10 ... Shape sensor, 10a ... Floodlight, 10b ... Light receiver, 11 ... wiping nozzle, 12 ... molten metal bath, 13 ... touch roll.

Claims (1)

A shape control device for an alloyed hot-dip galvanized metal strip that is provided in a production line for an alloyed hot-dip galvanized metal strip and that controls the shape of a metal strip whose cross section is curved in a substantially C shape by passing a contact roll. ,
The metal strip with the maximum production width is installed in the position in the width direction of the line. When the maximum plateable area that is the area occupied by Wa is defined as Wa, and the minimum plateable area that is the area occupied by the metal strip having the minimum production width in the width direction of the line is defined as Wb, the protrusion is substantially C-shaped. A first electromagnet group provided in the vicinity of the center in the width direction on the opposite side of the side and in the Wb region, and including one or more electromagnets;
Installed corresponding to the direction of warpage determined in advance by the characteristics of each line, such as the arrangement of rolls, provided at a position after the molten zinc bath,
The side which projects into the substantially C-shaped, and one or more electromagnets to the right of the region than in the central portion excluding the Wb region from Wa region of the strip width direction, the right-hand position than a central portion of Wb region a second electromagnet group provided to include a single electromagnet,
One or more electromagnets in a region on the left side of the central portion excluding the Wb region from the Wa region in the width direction on the side protruding in the substantially C shape, and a position on the left side of the central portion in the Wb region A third electromagnet group provided to include one electromagnet;
A control device for shape control of the metal strip so as to reduce the more warped of the substantially C-shaped in the first to third electromagnet group,
After the metal strip passes through the electromagnet, it is provided with one or two vibration suppression rolls that are in contact with one surface or both front and back surfaces of the metal strip at a position before being charged into the alloying furnace ,
An alloy characterized in that an electromagnet is not disposed in two regions on the opposite side of the substantially C-shaped projecting side and sandwiching the central portion in the band width direction and in a region excluding the Wb region from the Wa region. Shape control device for hot-dip galvanized metal strip.

Images