A guide device for a reversible continuous rolling mill for rolling flat steel

Abstract

The application discloses a guide device of a reversible continuous rolling mill for rolling square flat steel, which comprises a guide frame, a double-row guide roller system, a turbine box, a servo motor and import and export guide plates; the double-row guide roller system is installed in the guide frame, the guide frame is connected with a rolling mill guide beam through dovetail grooves at the bottom and is fixed through a pressing plate; the turbine box for adjusting the opening degree of the guide roller is installed at the outer side of the guide frame, the turbine box is connected with the double-row guide roller system through four pull rods; the input power of the turbine box is the servo motor, the servo motor is driven in the forward and reverse directions, the opening degree of the guide roller is quickly and accurately adjusted, and the reversible rolling requirement is met; the import and export guide plates are used for guiding the rolling piece to enter and exit the guide device. The guide device has strong impact resistance and straightening capacity, can be well matched with the reversible rolling rhythm of the rolling mill, is suitable for the production of square flat steel with multiple varieties, multiple specifications and small batches, and can effectively improve the production efficiency and reduce the production cost.

Description

Technical Field

[0001] This invention relates to the field of profile rolling technology in steel rolling production lines in the metal processing industry, and particularly to a reversible continuous rolling mill guide device for rolling square flat steel. Background Technology

[0002] A mill guide device is installed at the inlet and outlet of a mill. It closely follows the rolls, correctly guiding the workpiece between the rolls for rolling and correctly exiting the rolls. Currently, there are generally two methods for producing square and flat steel: One is a continuous rolling mill, where the finishing mill consists of 8-10 stands (horizontal and vertical), with 3-4 stands arranged vertically. This type of mill uses a perforated rolling mill, and large-sized products are rolled using a skip-stand rolling method. This method involves a variety of perforated rolls and guides, a large number of spare parts, complex management, long roll and guide replacement times when changing product types, low mill operating rate, and high labor intensity for workers. The second method uses a 3- or 5-stand reversible continuous rolling mill, with a mill arrangement of horizontal-vertical-horizontal or horizontal-vertical-horizontal-vertical-horizontal. This type of mill uses non-perforated rolls, and the workpiece is deformed by adjusting the roll gap during each reversible rolling cycle. The guide opening is also adjusted randomly and in real-time according to changes in workpiece size.

[0003] Currently, domestic reversible continuous rolling mills include the five-stand reversible continuous rolling mill from GFM of Austria, imported by Fushun Special Steel, and the three-stand reversible continuous rolling mill from DANIELI of Italy, imported by Sichuan Liuhe Special Materials. These types of reversible continuous rolling mills offer convenient product specification changes. Since both the rolls and guide rolls are flat rolls, no replacement is needed; only the roll gap and guide opening can be adjusted to meet rolling requirements. Furthermore, the number of spare parts is small, management is simple, production costs are low, the labor intensity of workers is reduced, and the mill's operating rate is improved. The characteristics of square and flat steel products—a wide variety of specifications and small batches—fully demonstrate the advantages of reversible continuous rolling mills. However, reversible continuous rolling mills have particularly high requirements for guides; without good guide devices, it is difficult to produce high-quality products.

[0004] Because it uses a non-perforated rolling process, the characteristics are twofold: first, the rolled piece is prone to bending, resulting in significant impact on the guide; second, the rolled piece is prone to lateral bending. Therefore, the guide needs to have strong impact resistance and straightening ability. Summary of the Invention

[0005] In view of the problems existing in the guides of current reversible continuous rolling mills, the purpose of this invention is to provide a guide device for reversible continuous rolling mills for rolling square and flat steel. The guide device is designed to be impact-resistant, has strong straightening ability, and can be well matched with the reversible rolling rhythm of the rolling mill. It is suitable for the production of square and flat steel of multiple varieties, specifications, and small batches, and can effectively improve production efficiency and reduce production costs.

[0006] To address the aforementioned technical problems, embodiments of the present invention provide the following solutions:

[0007] A reversible continuous rolling mill guide device for rolling square flat steel includes a guide frame (1), a double-row guide roll system (2), a turbine box (3), a servo motor (4), and inlet / outlet guide plates (5). The double-row guide roll system (2) is installed inside the guide frame (1). The guide frame (1) is connected to the mill guide beam through a dovetail groove at the bottom and fixed by a pressure plate. A turbine box (3) for adjusting the opening degree of the guide rolls is installed on the outside of the guide frame (1). The turbine box (3) is connected to the double-row guide roll system (2) through four tie rods (6). The input power of the turbine box (3) is the servo motor (4). The opening degree of the guide rolls is adjusted by the forward and reverse drive of the servo motor (4) to meet the requirements of reversible rolling. The inlet / outlet guide plates (5) are used to guide the workpiece into and out of the guide device.

[0008] Preferably, the double-row guide roller system (2) adopts a short stress line structure, the guide roller bearing is arranged in the bearing seat, and the guide roller adopts a double support structure to avoid direct impact on the workpiece. The double-row guide roller design meets the requirements of impact resistance and strong straightening process.

[0009] Preferably, the four pull rods (6) adjust the opening of the guide roller by rotating in both directions. The pull rods (6) are connected to the two bearing seats on the same side by positive and negative threads to achieve symmetrical adjustment of the opening of the guide roller, ensuring that the rolling center line remains unchanged, thereby ensuring that the rolled product is straight.

[0010] Preferably, the guide roller opening of the double-row guide roller system (2) is adjusted to adapt to the reversible rolling of products of different specifications; when the forward rolling is used as the inlet guide, the guide roller opening is reduced to guide the rolled piece into the rolling mill; when the reverse rolling is used as the outlet guide, the guide roller opening is enlarged to guide the rolled piece out of the rolling mill.

[0011] Preferably, the guide roller opening degree adjustment of the double-row guide roller system (2) is driven by the servo motor (4), and the control system of the servo motor (4) communicates with the rolling mill control system through PLC to coordinate the control of the reversible rolling process.

[0012] Preferably, the guide device is connected to the external pipelines by plugs. When the guide device is replaced, the external plugs, including the electricity, oil and water plugs, are unplugged, and the pressure plate fixed between the guide frame (1) and the mill guide beam is loosened. The entire device can then be lifted out for quick replacement, and the replaced guide device can be maintained outside the line.

[0013] The beneficial effects of the technical solutions provided by the embodiments of the present invention include at least the following:

[0014] Compared with existing technologies, the present invention provides a reversible continuous rolling mill guide device for rolling square and flat steel, which can be well coordinated with the reversible rolling rhythm of the rolling mill. The process is simple and suitable for the production of various varieties, specifications, and small batches of square and flat steel. This guide device is impact-resistant, has strong straightening capabilities, and automatically centers to ensure the straightness of the rolled products. It can effectively improve production efficiency, reduce production costs, and alleviate the labor intensity of workers. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figures 1a-1c This is an assembly schematic diagram of a reversible continuous rolling mill guide device for rolling square and flat steel provided in an embodiment of the present invention, wherein... Figure 1a This is the main view. Figure 1b It is a side view. Figure 1c It is a top view;

[0017] Figure 2 This is a schematic diagram of the structure of the double-row guide roller system provided in an embodiment of the present invention;

[0018] Figures 3a-3b These are product outline drawings of the square and flat steel rolled out according to embodiments of the present invention;

[0019] Figure 4 This is a schematic diagram of the production line process layout provided in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1-Guide frame; 2-Double row guide roller system; 3-Turbine box; 4-Servo motor; 5-Inlet and outlet guide plates; 6-Tie rod.

[0021] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the protection scope of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Embodiments of the present invention provide a reversible continuous rolling mill guide device for rolling square flat steel. Figures 1a-1c This is an assembly diagram of the guide device, wherein... Figure 1a This is the main view. Figure 1b It is a side view. Figure 1c It is a top view. Figure 2 This is a schematic diagram of the double-row guide roller system in the guide device.

[0024] The guide device includes a guide frame (1), a double-row guide roll system (2), a turbine box (3), a servo motor (4), and inlet / outlet guide plates (5). The double-row guide roll system (2) is installed inside the guide frame (1), which is connected to the mill guide beam via a dovetail groove at its bottom and fixed by a pressure plate. A turbine box (3) for adjusting the guide roll opening is installed on the outside of the guide frame (1), and the turbine box (3) is connected to the double-row guide roll system (2) via four tie rods (6). The turbine box (3) is powered by a servo motor (4), which drives the guide rolls in both directions to achieve rapid and precise adjustment of the guide roll opening to meet the requirements of reversible rolling. The inlet / outlet guide plates (5) guide the workpiece in and out of the guide device.

[0025] Furthermore, such as Figure 2 As shown, the double-row guide roller system (2) adopts a short stress line structure, the guide roller bearing is arranged in the bearing seat, and the guide roller adopts a double support structure to avoid direct impact on the rolled piece. The double-row guide roller design can achieve a straightening force of 10 tons, which meets the requirements of impact resistance and strong straightening process.

[0026] Four tie rods (6) adjust the opening of the guide rollers by rotating them forward and backward. The tie rods (6) are connected to the two bearing seats on the same side by forward and reverse threads, so as to achieve symmetrical adjustment of the opening of the guide rollers, ensure that the rolling center line remains unchanged, and thus ensure that the rolled product is straight. Figure 3a and Figure 3b The figures shown are schematic diagrams of the rolled square steel and flat steel.

[0027] In this embodiment of the invention, the guide roller opening degree of the double-row guide roller system (2) is adjusted to adapt to the reversible rolling of products of different specifications. Specifically, when the forward rolling is used as the inlet guide, the guide roller opening degree is reduced to guide the rolled piece into the rolling mill; when the reverse rolling is used as the outlet guide, the guide roller opening degree is increased to guide the rolled piece out of the rolling mill.

[0028] Furthermore, the guide roll opening degree adjustment of the double-row guide roll system (2) is driven by the servo motor (4). The control system of the servo motor (4) communicates with the rolling mill control system through the PLC to coordinate the control of the reversible rolling process, thereby coordinating well with the reversible rolling rhythm of the rolling mill and being able to quickly adapt to the reversible rolling rhythm of the rolling mill.

[0029] like Figure 4 As shown in the figure, this is a schematic diagram of the process layout of a typical reversible continuous rolling mill for rolling square and flat steel. The finishing mill consists of three mills, and the guide device is installed at the inlet and outlet of each mill. A total of 6 guide devices are installed on the three-stand reversible continuous rolling mill.

[0030] Furthermore, the guide device is connected to the external pipelines via plugs. When the guide device is replaced, the external plugs, including the electrical, oil, and water plugs, are unplugged, and the pressure plate that fixes the guide frame (1) to the mill guide beam is loosened. The entire device can then be lifted out for quick replacement, and the replaced guide device can be maintained outside the line.

[0031] The guide device provided by this invention has been put into use. It has improved upon the original random guide device provided by the three-stand reversible continuous rolling mill of DANIELI, Italy, which has significantly improved production efficiency and has been successfully applied.

[0032] Compared with existing technologies, this invention adopts a double-row guide roller system design, which has strong impact resistance and straightening ability; through the forward and reverse drive of the servo motor, the guide roller opening degree can be quickly and accurately adjusted, which can quickly adapt to the reversible rolling rhythm of the rolling mill; automatic centering ensures that the rolled products are straight, which is suitable for the production of square and flat steel of multiple varieties, specifications and small batches, and can effectively improve production efficiency, reduce production costs and reduce the labor intensity of workers.

[0033] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0034] The use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0035] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0036] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0037] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A guide device for a reversible continuous rolling mill for rolling square and flat steel, characterized in that, The guide device includes a guide frame (1), a double-row guide roll system (2), a turbine box (3), a servo motor (4), and inlet / outlet guide plates (5). The double-row guide roll system (2) is installed inside the guide frame (1). The guide frame (1) is connected to the mill guide beam through a dovetail groove at the bottom and fixed by a pressure plate. A turbine box (3) for adjusting the opening degree of the guide rolls is installed on the outside of the guide frame (1). The turbine box (3) is connected to the double-row guide roll system (2) through four tie rods (6). The input power of the turbine box (3) is the servo motor (4). The opening degree of the guide rolls is adjusted by the forward and reverse drive of the servo motor (4) to adapt to the requirements of reversible rolling. The inlet / outlet guide plates (5) are used to guide the workpiece into and out of the guide device. The double-row guide roller system (2) adopts a short stress line structure, the guide roller bearing is arranged in the bearing seat, and the guide roller adopts a double support structure to avoid direct impact on the workpiece. The double-row guide roller design meets the requirements of impact resistance and strong straightening process. The four tie rods (6) adjust the opening of the guide roller by reversing the direction of rotation. The tie rods (6) are connected to the two bearing seats on the same side by reversing the direction of rotation, so as to realize the symmetrical adjustment of the opening of the guide roller, ensure that the rolling center line remains unchanged, and thus ensure that the rolled product is straight. The guide roller opening of the double-row guide roller system (2) is adjusted to adapt to the reversible rolling of products of different specifications; when the forward rolling is used as the inlet guide, the guide roller opening is reduced to guide the rolled piece into the rolling mill; when the reverse rolling is used as the outlet guide, the guide roller opening is enlarged to guide the rolled piece out of the rolling mill.

2. The reversible continuous rolling mill guide device for rolling square and flat steel according to claim 1, characterized in that, The opening degree of the double-row guide roller system (2) is adjusted by the servo motor (4). The control system of the servo motor (4) communicates with the rolling mill control system through PLC to coordinate the control of the reversible rolling process.

3. The reversible continuous rolling mill guide device for rolling square and flat steel according to claim 1, characterized in that, The guide device is connected to the external pipelines by plugs. When the guide device is replaced, the external plugs, including the electric, oil and water plugs, are unplugged, and the pressure plate fixed between the guide frame (1) and the mill guide beam is loosened. The whole device can be lifted out to achieve quick replacement. The replaced guide device is maintained on-line.

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