A control method for a rolling device

Abstract

An embodiment of the present application provides a control method for a rolling device, where the rolling device includes a working side vertical roll and a driving side vertical roll, and the method includes: before the slab enters the rolling device, obtaining the width change data of the slab; if the width change data meets the width control condition, determining the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data; after triggering a width control signal for the slab, controlling the working side vertical roll and the driving side vertical roll to move according to the corresponding action stroke and action speed. The technical solution of the embodiment of the present application can, to a certain extent, strengthen the opening degree control of the rolling device and reduce the occurrence of the situation where the actual width change of the slab does not match.

Description

Technical Field

[0001] This application relates to the field of rolling technology, and more particularly, to a control method for rolling equipment. Background Art

[0002] During the slab rolling process, due to reasons such as slippage between the slab and the tunnel furnace roller table and the inlet roller table of the rolling equipment, there is a difference between the actual width change position of the produced slab and the calculated tracking position data, resulting in a mismatch between the opening control of the rolling equipment and the actual width change of the slab. The control state of the rolling equipment for the slab is poor, causing deviation, and problems such as width tolerance exceeding of the produced strip steel.

[0003] Based on this, those skilled in the art urgently need a control method for rolling equipment that can strengthen the opening control of the rolling equipment and reduce the occurrence of mismatch in the actual width change of the slab. Summary of the Invention

[0004] An embodiment of this application provides a control method for rolling equipment, which can, at least to a certain extent, strengthen the opening control of the rolling equipment and reduce the occurrence of mismatch in the actual width change of the slab.

[0005] Other features and advantages of this application will become apparent through the following detailed description, or be learned in part through the practice of this application.

[0006] According to one aspect of the embodiments of this application, a control method for rolling equipment is provided. The rolling equipment includes a working side vertical roll and a driving side vertical roll. The method includes: before the slab enters the rolling equipment, obtaining the width change data of the slab; if the width change data meets the width control condition, determining the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data; after triggering the width control signal for the slab, controlling the working side vertical roll and the driving side vertical roll to move according to the corresponding action stroke and action speed.

[0007] In some embodiments of this application, the width change data includes a width change value, a width change start position, a width change end position, and a width change interval length.

[0008] In some embodiments of this application, the width control condition includes: the width change value is greater than or equal to a predetermined change value.

[0009] In some embodiments of the present application, determining the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data includes: determining the action stroke according to the width change value; obtaining the rotational speeds of the working side vertical roll and the driving side vertical roll, and determining the action speed according to the width change interval length, the rotational speeds, and the action stroke.

[0010] In some embodiments of the present application, determining the action stroke according to the width change value includes: determining half of the width change value as the action stroke.

[0011] In some embodiments of the present application, determining the action speed according to the width change interval length and the rotational speed includes: determining the action time according to the width change interval length and the rotational speed; determining the action speed according to the action stroke and the action time.

[0012] In some embodiments of the present application, triggering the width control signal for the slab includes: continuously obtaining the actual rolling force of the working side vertical roll and the actual rolling force of the driving side vertical roll; if the first difference between the actual rolling force of the working side vertical roll and the first locked rolling force is greater than a predetermined difference and the second difference between the actual rolling force of the driving side vertical roll and the second locked rolling force is greater than the predetermined difference, then triggering the width control signal for the slab.

[0013] In some embodiments of the present application, the working side vertical roll and the driving side vertical roll include corresponding width adjustment hydraulic cylinders, and the method further includes: if the action stroke of the width adjustment hydraulic cylinder reaches the action stroke of the width adjustment hydraulic cylinders of the working side vertical roll and the driving side vertical roll, controlling the width adjustment hydraulic cylinder to stop acting.

[0014] In some embodiments of the present application, the working side vertical roll and the driving side vertical roll include corresponding width adjustment hydraulic cylinders, and the method further includes: if the actual rolling force of the working side vertical roll is greater than or equal to the product of the first locked rolling force and a predetermined ratio, controlling the corresponding width adjustment hydraulic cylinder to stop acting; if the actual rolling force of the driving side vertical roll is greater than or equal to the product of the second locked rolling force and the predetermined ratio, controlling the corresponding width adjustment hydraulic cylinder to stop acting.

[0015] According to one aspect of the embodiments of the present application, a control device for a rolling equipment is provided. The device includes: a material tracking unit configured to obtain width change data of a slab before the slab enters the rolling equipment; a control unit configured to determine the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data if the width change data meets the width control condition, and is further configured to control the working side vertical roll and the driving side vertical roll to move according to the corresponding action stroke and action speed after a width control signal for the slab is triggered.

[0016] Based on the above solution, the technical solution provided by the present application has at least the following advantages and improvements:

[0017] In the technical solutions provided by some embodiments of the present application, it is possible to provide a relatively accurate opening degree control for the rolling equipment after a large change in the width of the produced slab, solving the problem that due to reasons such as slipping between the slab and the tunnel furnace roller table and the mill inlet, there is a deviation between the actual width change position of the produced slab and the calculated slab tracking position data, resulting in a mismatch between the opening degree control of the rolling equipment and the actual width of the slab, and the control state of the rolling equipment for the slab is not good, causing deviation and width out-of-tolerance of the produced strip steel.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts. In the drawings:

[0020] Figure 1 shows a flowchart of a control method for a rolling equipment according to an embodiment of the present application;

[0021] Figure 2 shows a flowchart of a control method for a rolling equipment according to an embodiment of the present application;

[0022] Figure 3 shows a flowchart of a control method for a rolling equipment according to an embodiment of the present application;

[0023] Figure 4 shows a structural diagram of a control device for a rolling equipment in an embodiment of the present application;

[0024] Figure 5The schematic diagram of the control principle of the rolling equipment in an embodiment of the present application is shown. Detailed implementation manners

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0026] The flowcharts shown in the accompanying drawings are merely illustrative and not necessarily include all the contents and operations / steps, nor are they necessarily executed in the order described. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may be changed according to the actual situation.

[0027] Please refer to Figure 1 。

[0028] Figure 1 The flowchart of the control method of the rolling equipment according to an embodiment of the present application is shown. The rolling equipment includes a working side vertical roll and a driving side vertical roll. The method may include steps S101 - S103:

[0029] Step S101, before the slab enters the rolling equipment, obtain the width change data of the slab.

[0030] Step S102, if the width change data meets the width control condition, determine the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data.

[0031] Step S103, after triggering the width control signal for the slab, control the working side vertical roll and the driving side vertical roll to move according to the corresponding action stroke and action speed.

[0032] In this embodiment, the width change data may include a width change value, a width change start position, a width change end position, and a width change interval length. Among them, the width change interval length can be determined according to the width change start position and the width change end position.

[0033] In this embodiment, the width control condition may include: the width change value is greater than or equal to a predetermined change value.

[0034] In the present application, control intervention is required only when the width change of the slab reaches a certain degree to reduce the occurrence of the phenomenon that the slab width exceeds the tolerance. For example, the predetermined change value can be set to ±20 mm, that is, when the width change value of the slab exceeds the range of ±20 mm, the control method provided by the present application intervenes in the control. On the premise of reducing the usual consumption, the control can be intervened in a timely manner, and the timeliness of the opening degree control of the rolling equipment can be improved.

[0035] Please refer to Figure 2 。

[0036] Figure 2 Fig. shows a flow diagram of a control method for a rolling equipment according to an embodiment of the present application. The method for determining the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data may include steps S201 - S202:

[0037] Step S201, determining the action stroke according to the width change value.

[0038] Step S202, obtaining the rotational speeds of the working side vertical roll and the driving side vertical roll, and determining the action speed according to the width change interval length, the rotational speed, and the action stroke.

[0039] In this embodiment, the method for determining the action stroke according to the width change value may include: determining half of the width change value as the action stroke.

[0040] In this embodiment, the method for determining the action speed according to the width change interval length and the rotational speed may include: determining the action time according to the width change interval length and the rotational speed; determining the action speed according to the action stroke and the action time.

[0041] In the present application, since the rotational speeds of the working side vertical roll and the driving side vertical roll are basically stable and unchanged, and the width change interval length of the slab can also be accurately obtained, it is easy to calculate the time for the width change interval of the slab to pass through the two vertical rolls, and this time can be used as the action time of the two vertical rolls. The two vertical rolls need to complete the action stroke within the action time, and it is also easy to calculate the action speeds of the working side vertical roll and the driving side vertical roll.

[0042] Please refer to Figure 3 。

[0043] Figure 3 Fig. shows a flow diagram of a control method for a rolling equipment according to an embodiment of the present application. The method for triggering the width control signal for the slab may include steps S301 - S302:

[0044] Step S301, continuously obtain the actual rolling force of the working side vertical roll and the actual rolling force of the driving side vertical roll.

[0045] Step S302, if the first difference between the actual rolling force of the working side vertical roll and the first locked rolling force is greater than a predetermined difference and the second difference between the actual rolling force of the driving side vertical roll and the second locked rolling force is greater than the predetermined difference, then trigger a width control signal for the slab.

[0046] In the present application, the first locked rolling force can be the rolling force of the working side vertical roll when the width change range of the slab has not entered the rolling equipment, and the second locked rolling force can be the rolling force of the driving side vertical roll when the width change range of the slab has not entered the rolling equipment.

[0047] In the present application, the predetermined difference can be 100 kN. Whether the difference between the actual rolling force of the working side vertical roll or the actual rolling force of the driving side vertical roll and the corresponding locked rolling force is greater than 100 kN, it can be determined that the width change range of the slab has entered the rolling equipment, and the control of the widening phenomenon of the slab width can be started.

[0048] In this embodiment, the working side vertical roll and the driving side vertical roll include corresponding width adjustment hydraulic cylinders, and the method further includes: if the action stroke of the width adjustment hydraulic cylinder reaches the action stroke of the width adjustment hydraulic cylinders of the working side vertical roll and the driving side vertical roll, control the width adjustment hydraulic cylinder to stop acting.

[0049] In this embodiment, the working side vertical roll and the driving side vertical roll include corresponding width adjustment hydraulic cylinders, and the method further includes: if the actual rolling force of the working side vertical roll is greater than or equal to the product of the first locked rolling force and a predetermined ratio, control the corresponding width adjustment hydraulic cylinder to stop acting; if the actual rolling force of the driving side vertical roll is greater than or equal to the product of the second locked rolling force and the predetermined ratio, control the corresponding width adjustment hydraulic cylinder to stop acting.

[0050] Next, a device embodiment of the present application will be described in conjunction with the drawings.

[0051] Please refer to Figure 4 .

[0052] Figure 4 The structural schematic diagram of the control device of the rolling equipment in an embodiment of the present application is shown. The device 400 may include: a material tracking unit 401 and a control unit 402.

[0053] Among them, the specific configuration can be as follows:

[0054] The material tracking unit 401 is used to obtain the width change data of the slab before the slab enters the rolling equipment;

[0055] The control unit 402 is used to determine the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data if the width change data meets the width control condition, and is also used to control the working side vertical roll and the driving side vertical roll to move according to the corresponding action stroke and action speed after triggering the width control signal for the slab.

[0056] To enable those skilled in the art to understand the present application more deeply, a complete embodiment will be described below.

[0057] Please refer to Figure 5 。

[0058] Figure 5 It shows a simplified diagram of the control principle of the rolling equipment in an embodiment of the present application.

[0059] Combined with Figure 5 , the caster control device 501, the material tracking control device 502, the rolling mill control device 503, the slab 504 with a changed width, the working side vertical roll width adjustment hydraulic cylinder valve platform 505, the linear position sensor 506, the working side vertical roll width adjustment hydraulic cylinder 507, the working side vertical roll 508, the driving side vertical roll width adjustment hydraulic cylinder valve platform 509, the linear position sensor 510, the driving side vertical roll width adjustment hydraulic cylinder 511, and the driving side vertical roll 512.

[0060] First, the continuous casting machine control device sends the slab width data produced by the slab continuous casting machine to the rolling mill control device. Before the slab width change, the width is 1218 mm, after the change, the width is 1180 mm. The starting position of the slab width change is 6600 mm, the interval length of the slab width change is 8500 mm, and the ending position of the slab width change is 15100 mm. The rolling mill control device calculates the slab width change as 1180 - 1218 mm = -38 mm through the received data. The change value exceeds the starting width change condition of ±20 mm set for the edger roll mill opening widening control. The rolling mill control device starts the edger roll mill opening widening control. The rolling mill control device memorizes the rolling force of 665 kN generated between the working side edger roll and the slab at this time as the locked rolling force of the working side edger roll, and memorizes the rolling force of 640 kN generated between the drive side edger roll and the slab as the locked rolling force of the drive side edger roll. When the interval where the slab width changes reaches the edger roll mill area, the rolling force generated between the working side edger roll and the slab is 565 kN, and the rolling force generated between the drive side edger roll and the slab is 620 kN. Since the actual rolling forces on both sides of the edger roll are less than the locked rolling force by 100 kN and there is a 1-second delay, the rolling mill control device takes half of the slab width change data of -38 mm and sets the action stroke target values of the width adjustment hydraulic cylinders for both the working side edger roll and the drive side edger roll to -19 mm. At this time, the rotational speeds of the working side edger roll and the drive side edger roll are 0.075 m / s. The rolling mill control device calculates that the time for the slab width change interval of 8500 mm to pass through the edger roll is 113 seconds, and calculates the speed of the width adjustment hydraulic cylinders of the working side edger roll and the drive side edger roll moving -19 mm within 113 seconds as -0.168 mm / s. Based on the above data, the rolling mill control device sends a control command for the edger roll mill opening widening with an action stroke of -19 mm and an action speed of -0.168 mm / s to the valve platforms of the width adjustment hydraulic cylinders of the working side edger roll and the drive side edger roll. The width adjustment hydraulic cylinders of the working side edger roll and the drive side edger roll act according to the command information. When the rolling mill control device calculates through the linear position sensors installed on the width adjustment hydraulic cylinders of the working side edger roll and the drive side edger roll that the actual action stroke reaches -19 mm, the rolling mill control device ends this edger roll mill opening widening control.

[0061] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application.

[0062] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A control method for a rolling equipment, characterized in that, the rolling equipment includes a working side vertical roll and a driving side vertical roll, and the method includes: Before the slab enters the rolling equipment, obtain the width change data of the slab; If the width change data meets the width control condition, determine the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data; After triggering the width control signal for the slab, control the working side vertical roll and the driving side vertical roll to move according to the corresponding action stroke and action speed; The width change data includes a width change value, a width change start position, a width change end position, and a width change interval length; The determining the action stroke and action speed of the working side vertical roll and the driving side vertical roll according to the width change data includes: Determine the action stroke according to the width change value; Obtain the rotation speeds of the working side vertical roll and the driving side vertical roll, and determine the action speed according to the width change interval length, the rotation speed, and the action stroke; The width control condition includes: the width change value is greater than or equal to a predetermined change value; The determining the action stroke according to the width change value includes: Determine half of the width change value as the action stroke; The determining the action speed according to the width change interval length and the rotation speed includes: Determine the action time according to the width change interval length and the rotation speed; Determine the action speed according to the action stroke and the action time.

2. The method according to claim 1, characterized in that, the triggering the width control signal for the slab includes: Obtain the first locked rolling force of the working side vertical roll, and obtain the second locked rolling force of the driving side vertical roll; Continuously obtain the actual rolling force of the working side vertical roll and the actual rolling force of the driving side vertical roll; If the first difference between the actual rolling force of the working side vertical roll and the first locked rolling force is greater than a predetermined difference and the second difference between the actual rolling force of the driving side vertical roll and the second locked rolling force is greater than the predetermined difference, trigger the width control signal for the slab.

3. The method according to claim 2, characterized in that, the working side vertical roll and the driving side vertical roll include corresponding width adjustment hydraulic cylinders, and the method further includes: If the action stroke of the width adjustment hydraulic cylinder reaches the action stroke of the width adjustment hydraulic cylinders of the working side vertical roll and the driving side vertical roll, control the width adjustment hydraulic cylinder to stop acting.

4. The method according to claim 2, characterized in that, the working side vertical roll and the driving side vertical roll include corresponding width adjustment hydraulic cylinders, and the method further includes: If the actual rolling force of the working side vertical roll is greater than or equal to the product of the first locked rolling force and a predetermined ratio, control the corresponding width adjustment hydraulic cylinder to stop acting; If the actual rolling force of the driving side vertical roll is greater than or equal to the product of the second locked rolling force and a predetermined ratio, control the corresponding width adjustment hydraulic cylinder to stop acting.

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