Method for displaying deviation of hot continuous rolling plate and strip through guide and guard device

Abstract

The invention relates to a method for displaying deviation of a hot continuous rolling plate strip through a guide and guard device, which comprises the following steps of: respectively adding guide and guard display symbols in the inlet direction and the outlet direction of an operation picture of a rolling mill to form an inlet guide and guard display symbol and an outlet guide and guard display symbol; and if the actual value of the position of the current rack inlet guide and guard and the actual value of the non-threading state exceed the threshold value, marking the guide and guard display symbol on the deviation side. By adding the guide display symbols, the deviation condition of the strip steel can be monitored in real time, meanwhile, an operator is reminded to horizontally adjust the roller, and the purposes of improving the product quality and reducing defective products are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling mills, and particularly to a method for displaying the deviation of a hot continuous rolling strip through a guide device. Background Art

[0002] Main layout of the operation screen of modern hot continuous rolling strip mills Figure 1 Generally as Figure 1 Shown: The frame graphic is composed of backup rolls and work rolls, equipped with a loop mechanism displayed by circular symbols. The graphic of the entrance guide device of each rolling mill consists of two upper and lower line segments with slightly upturned tails, representing the drive side and the operation side respectively. The main function of the guide device of the strip mill is to guide the direction and shape of the rolled strip. The guide device is installed on both the front and rear sides of the rolling mill. It is divided into an entrance guide and an exit guide, which are used to guide the direction of the rolled strip, ensure that the strip enters and exits the rolling mill at the set position, direction and state, and avoid the rolled piece from winding around the roll, and serious deviation of the head and tail of the strip. Generally, the width of the entrance guide changes according to the width of the strip (completed by a width-adjusting hydraulic cylinder). The exit guide has a fixed opening and does not change with the change of the strip width.

[0003] Since a position sensor is installed in the width-adjusting hydraulic cylinder of the entrance guide of the rolling mill. Therefore, the opening degree of the entrance guide can, according to the rolling requirements, drive the guides on the drive side and the operation side respectively to open symmetrically on both sides along the rolling center line direction to reach the required position for rolling. Since there is a position sensor in the width-adjusting hydraulic cylinder of the entrance guide, then during the threading and tail-off processes of the strip, if deviation occurs, there will be friction and impact with the guide device, causing the position of the guide to change. However, during this process, the operator can only rely on visual observation and it is difficult to capture the small deviation of the guide position in a timely and accurate manner, which affects the quality of the rolled product. Summary of the Invention

[0004] To solve the above problems, the purpose of the embodiments of the present invention is to provide a method for displaying the deviation of a hot continuous rolling strip through a guide device.

[0005] A method for displaying the deviation of a hot continuous rolling strip through a guide device includes:

[0006] Step 1: Add a group of guide display symbols respectively in the entrance direction and the exit direction of the operation screen of the rolling mill to form an entrance guide display symbol and an exit guide display symbol; the guide display symbol is used to record the deviation situation of the strip in each rolling mill;

[0007] Step 2: When the rolling mill is operating in the threading stage, if the actual value of the position of the entrance guide of the current stand exceeds the threshold value compared with the actual value when not threading, mark the entrance guide display symbol on the deviation side;

[0008] Step 3: When the rolling mill is operating in the stable rolling stage, if the actual position of the entry guide of the current stand exceeds the threshold value compared with the actual position when not loaded, the display symbol of the entry guide on the deviated side will flash.

[0009] Step 4: When the rolling mill is operating in the tail-out stage, if the actual value of the entry guide of the current stand exceeds the threshold value compared with the actual value when not threading, the display symbol of the exit guide on the deviated side will be marked.

[0010] Preferably, in Step 2, when the rolling mill is operating in the threading stage, if the actual position deviation of the entry guide of the current stand exceeds +0.1 mm compared with the actual position when not threading, the display symbol of the entry guide on the deviated side will turn red.

[0011] Preferably, in Step 3, when the rolling mill is operating in the stable rolling stage, if the actual position deviation of the entry guide of the current stand exceeds +0.1 mm compared with the actual position when not loaded, the display symbol of the entry guide on the deviated side will flash in orange / green colors to remind the operator to make adjustments until the operator reduces the deviation value to 0 through adjustment.

[0012] Preferably, in Step 4, when the rolling mill is operating in the tail-out stage, if the actual position deviation of the entry guide of the current stand exceeds +0.1 mm compared with the actual position when not threading, the display symbol of the exit guide on the deviated side will turn red.

[0013] The present invention also provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor. The transceiver, the memory, and the processor are connected through the bus. It is characterized in that when the computer program is executed by the processor, it realizes the steps in the above method for displaying the deviation of the hot continuous rolling strip through the guide device.

[0014] The present invention also provides a computer-readable storage medium, on which a computer program is stored. It is characterized in that when the computer program is executed by a processor, it realizes the steps in the above method for displaying the deviation of the hot continuous rolling strip through the guide device.

[0015] According to the specific embodiments provided by the present invention, the following technical effects are disclosed by the present invention:

[0016] The present invention relates to a method for displaying the deviation of the hot continuous rolling strip through the guide device. Compared with the prior art, by adding a guide display symbol, the present invention can monitor the deviation of the strip in real time and at the same time remind the operator to adjust the roll level, so as to achieve the purpose of improving product quality and reducing the generation of defective products.

[0017] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following provides preferred embodiments in conjunction with the accompanying drawings and describes them in detail as follows. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is the main layout diagram of the operation screen of the modern hot strip mill provided by the present invention;

[0020] Figure 2 It is the improved operation screen diagram provided by the present invention;

[0021] Figure 3 It is the display screen diagram of the threading stage provided by the present invention;

[0022] Figure 4 It is the display screen diagram of the stable rolling stage provided by the present invention;

[0023] Figure 5 It is the display screen diagram of the tailing-off stage provided by the present invention;

[0024] Figure 6 It is the display screen diagram of the rolling interval provided by the present invention. Detailed Embodiments

[0025] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0027] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer to Figures 1-6 , a method for displaying the deviation of a hot-rolled strip through a guide device, comprising:

[0029] Step 1: Add a set of guide device display symbols respectively in the inlet direction and the outlet direction of the operation screen of the rolling mill to form an inlet guide device display symbol and an outlet guide device display symbol; the guide device display symbols are used to record the deviation conditions of the strip steel in each rolling mill;

[0030] Taking advantage of the fact that the inlet guide device of the rolling mill is equipped with a position sensor, if the strip steel deviates during the rolling stage, it will rub against and impact the inlet guide device, causing a change in the position of the guide device. Then, the color of the guide device symbol on the operation screen will change accordingly, giving a prompt to the operator to remind for timely adjustment. Ensure the high-quality and stable rolling of the strip steel. Because there is only a graphic display of the inlet guide device on the traditional operation screen. Therefore, if you want to use the position sensor installed in the inlet guide device to track and record the deviation conditions of the head and tail of the strip steel respectively, the graphic symbol display of the inlet guide device alone is far from enough. Therefore, as Figure 2 shown: Add a set of guide device display symbols (arrow 1) in the outlet direction of the operation screen rack. When used to record the deviation of the strip steel tail, if it has a pushing effect on the single-sided inlet guide device. When the position of the guide device changes, the color of the corresponding guide device will also change until the next strip steel enters the descaling machine. Arrow 2 similarly shows the position change of the strip steel head on the inlet guide device.

[0031] Step 2: When the rolling mill is working in the threading stage, if the actual value of the position of the inlet guide device of the current stand exceeds the threshold value compared with the actual value when no strip is threaded, mark the inlet guide device display symbol on the deviation side;

[0032] Step 3: When the rolling mill is working in the stable rolling stage, if the actual position of the inlet guide device of the current stand exceeds the threshold value compared with the actual position when not loaded, flash the inlet guide device display symbol on the deviation side;

[0033] Step 4: When the rolling mill is working in the tail-off stage, if the actual value of the inlet guide device of the current stand exceeds the threshold value compared with the actual value when no strip is threaded, mark the outlet guide device display symbol on the deviation side.

[0034] The method of the present invention will be further described below in conjunction with specific embodiments:

[0035] As Figure 2 shown, on the original operation screen, a set of guide guard display symbols are added one by one behind the rack. Arrow 1 is the newly added display symbol, which is used to record the influence of the strip tail deviation on the position of the entrance guide guard. Arrow 2 points to the entrance guide guard symbol originally carried on the operation screen. It is also used to record the influence of the strip deviation on the position of the entrance guide guard during the strip threading and stable rolling process.

[0036] Figure 3 For the threading stage display: During the process of threading the strip through each stand, when the actual value of the entrance guide guard position of the current stand deviates from the actual value when no strip is threaded by more than +0.1 mm, the entrance guide guard on the deviated side will turn red. As shown in Figure 3 below: It means that during the threading process, the head of the strip hits the operating side of the F2 stand and the driving side of the F3 stand, and causes the guide guard on this side to be displaced.

[0037] Figure 4 For the stable rolling stage: During the stable rolling process of the strip in the stand, the loading of the last stand is used as the trigger signal (the rolling force of the last stand exceeds 5 MN). If at this time, in the continuous rolling mill unit, the actual position of the entrance guide guard of a certain stand deviates from the actual position when not loaded by more than +0.1 mm, then the guide guard on the deviated side will flash in orange / green colors to remind the operator. The flashing will end until the deviation value decreases to 0, and it will return to the initial color of the screen.

[0038] Figure 5 Tail-off stage: During the process of the strip tail leaving the rolling mill stand by stand, if the actual value of the entrance guide guard of the current stand deviates from the actual value when no strip is threaded by more than +0.1 mm, the newly added guide guard display graphic will correspondingly turn the guide guard on the deviated side red. As Figure 5 shown: During the tail-off process, the operating sides of the entrance guide guards of the F2 and F4 stands are displaced, and the driving sides of the entrance guide guards of the F3 / F5 stands are displaced. This display scheme is retained until the next strip enters the descaling machine.

[0039] During the rolling interval time (after the previous strip is rolled and before the next strip enters the descaling machine), on the operation screen, the unilateral displacement of the guide guard caused by the strip deviation during threading and tail-off is respectively displayed through the entrance guide guard and the newly added guide guard symbol. As Figure 6As shown, it indicates that the driving-side guard rail is displaced when the strip tails off at F2 and F4 stands, and the head of the strip impacts the driving-side guard rail during the threading process at F3 and F5 stands, causing the guard rail to be displaced. Through this display screen, the operator can modify the leveling values of the corresponding stands to improve the centering of the strip during the threading and tailing-off processes, avoid the generation of the number of meters of defects such as the overlapping of the strip head and wavy defects, and at the same time reduce the occurrence of the strip tail whipping, avoid the generation of roll mark defects, improve the surface quality of the strip, and extend the service life of the rolls.

[0040] According to the specific embodiments provided by the present invention, the following technical effects are disclosed by the present invention:

[0041] The present invention relates to a method for displaying the deviation of a hot-rolled strip through a guard rail device. Compared with the prior art, the present invention can monitor the deviation of the strip in real time by adding a guard rail display symbol, and at the same time remind the operator to adjust the roll level, so as to achieve the purpose of improving the product quality and reducing the generation of defective products.

[0042] The present invention also provides an electronic device, including a bus, a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor. The transceiver, the memory, and the processor are connected through the bus. It is characterized in that when the computer program is executed by the processor, the steps in the above-mentioned method for displaying the deviation of a hot-rolled strip through a guard rail device are realized. Compared with the prior art, the beneficial effects of the electronic device provided by the present invention are the same as those of the above-mentioned method for displaying the deviation of a hot-rolled strip through a guard rail device, and will not be elaborated here.

[0043] The present invention also provides a computer-readable storage medium, on which a computer program is stored. It is characterized in that when the computer program is executed by a processor, the steps in the above-mentioned method for displaying the deviation of a hot-rolled strip through a guard rail device are realized. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as those of the above-mentioned method for displaying the deviation of a hot-rolled strip through a guard rail device, and will not be elaborated here.

[0044] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of technical solutions of changes or substitutions within the technical scope disclosed by the present invention, and all of them should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for displaying the deviation of a hot continuous rolling strip through a guiding device, characterized in that, Including: Step 1: Add a set of guide device display symbols respectively in the entrance direction and the exit direction of the operation screen of the rolling mill to form an entrance guide device display symbol and an exit guide device display symbol; the guide device display symbols are used to record the deviation situation of the strip steel in each rolling mill. Step 2: When the rolling mill is in the strip threading stage, if the actual value of the entrance guide device position of the current stand exceeds the threshold value compared with the actual value when there is no strip threading, mark the entrance guide device display symbol on the deviation side. Step 3: When the rolling mill is in the stable rolling stage, if the actual position of the entrance guide device of the current stand exceeds the threshold value compared with the actual position when not loaded, flash the entrance guide device display symbol on the deviation side. Step 4: When the rolling mill is in the strip tailing stage, if the actual value of the entrance guide device of the current stand exceeds the threshold value compared with the actual value when there is no strip threading, mark the exit guide device display symbol on the deviation side.

2. The method for displaying the deviation of a hot continuous rolling strip through a guide device according to claim 1, wherein, In the Step 2, when the rolling mill is in the strip threading stage, if the actual value of the entrance guide device position of the current stand exceeds the position deviation of +0.1 mm compared with the actual value when there is no strip threading, change the entrance guide device display symbol on the deviation side to red.

3. A method for displaying the deviation of a hot continuous rolling strip through a guide device according to claim 2, characterized in that, In Step 3, when the rolling mill is in the stable rolling stage, if the actual position of the entrance guide device of the current stand exceeds the position deviation of +0.1 mm compared with the actual position when not loaded, flash the entrance guide device display symbol on the deviation side in orange / green colors to remind the operator to make adjustments until the operator reduces the deviation value to 0 through adjustment.

4. A method for displaying the deviation of a hot-rolled strip through a guide device according to claim 3, characterized in that, In the Step 4, when the rolling mill is in the strip tailing stage, if the actual value of the entrance guide device of the current stand exceeds the position deviation of +0.1 mm compared with the actual value when there is no strip threading, change the exit guide device display symbol on the deviation side to red.

5. An electronic device, comprising a bus, a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the transceiver, the memory, and the processor are connected through the bus, characterized in that, When the computer program is executed by the processor, it realizes the steps in a method for displaying the deviation of hot continuous rolling strip through a guide device according to any one of claims 1 - 4.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it realizes the steps in a method for displaying the deviation of hot continuous rolling strip through a guide device according to any one of claims 1 - 4.

Images