Electric screwdown device and method for a reversing hot rolling mill

Abstract

The application provides a reversible hot rolling mill electric screwdown device and method, which comprises a driving side screwdown device, an operating side screwdown device and a synchronization mechanism, the driving side screwdown device and the operating side screwdown device are parallel to the rolling direction, the synchronization mechanism is perpendicular to the rolling direction, one side of the synchronization mechanism is connected with the driving side screwdown device, and the other side is connected with the operating side screwdown device, which is used for realizing mechanical synchronization of the driving side screwdown device and the operating side screwdown device; the driving side screwdown device comprises a first driving mechanism, a first screwdown screw, a first screwdown nut and a first AGC cylinder; and the operating side screwdown device comprises a second driving mechanism, a second screwdown screw, a second screwdown nut and a second AGC cylinder. The application increases the three-dimensional space of the rolling mill maintenance, facilitates the crane to carry out lifting operation, solves the lifting dead angle problem, improves the operability and safety of the workshop operation, reduces the equipment failure point, reduces the equipment failure rate, and improves the mechanism synchronization precision.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, and more particularly to an electric pressing device and method for a reversible hot rolling mill. Background Technology

[0002] Choosing the right motor and reducer configuration for the pressing device is crucial in the design. This is because the pressing mechanism design must not only meet the pressing process requirements but also consider other factors, such as: space constraints for the motor and reducer placement; lifting space for roller changes, maintenance guides, and accident handling; and the operability of equipment maintenance.

[0003] Electric roll reduction is the most commonly used upper roll adjustment device. In reversible hot rolling mills, the electric roll reduction device is installed on the mill stand and is divided into drive-side and operator-side electric roll reduction devices. The structure of the electric roll reduction device is closely related to the roll's travel distance, reduction speed, and operating frequency. The technological characteristics of the electric roll reduction device in reversible hot rolling mills are: 1) During operation, the upper roll requires rapid, large-stroke, and frequent adjustments; 2) During roll adjustment, no rolling load is applied, i.e., roll reduction is not performed with "steel" on it. To adapt to these characteristics, the requirements for the roll reduction device are: 1) Use a transmission system with low inertia to facilitate frequent starting and braking; 2) High transmission efficiency and reliability.

[0004] Traditional electric pressing devices (such as) Figure 1 The following problems and shortcomings exist:

[0005] (1) Due to mechanical structure limitations, traditional electric pressing devices require a large space, resulting in a complex structure, heavy weight, and high manufacturing cost for the equipment base and platform. At the same time, they occupy a large amount of vertical space, affecting the crane's lifting operations during equipment maintenance.

[0006] (2) Traditional electric pressing devices generally use a cylindrical gear-worm gear combined reducer with two-stage cylindrical gears and one-stage worm gear. The reducer has a complex structure, heavy weight, and high manufacturing cost.

[0007] (3) The electric reduction device of the reversible hot rolling mill consists of a drive-side reduction device and an operating-side reduction device. During the rolling process, it is necessary to ensure that the reduction devices on both sides operate synchronously to ensure consistent roll gap. Traditional electric reduction systems use electrical synchronization control or flexible couplings to achieve synchronous reduction.

[0008] Therefore, it is necessary to develop an electric pressing device for reversible hot rolling mills to solve the above-mentioned problems of traditional technologies. Summary of the Invention

[0009] In response to the aforementioned technical problems, an electric pressing device and method for a reversible hot rolling mill are provided.

[0010] The technical means employed in this invention are as follows:

[0011] An electric pressing device for a reversible hot rolling mill includes: a drive-side pressing device, an operating-side pressing device, and a synchronization mechanism. The drive-side pressing device and the operating-side pressing device are parallel to the rolling direction, and the synchronization mechanism is perpendicular to the rolling direction. One side of the synchronization mechanism is connected to the drive-side pressing device, and the other side is connected to the operating-side pressing device, for realizing the mechanical synchronization of the drive-side pressing device and the operating-side pressing device.

[0012] The transmission-side pressing device includes a first transmission mechanism, a first pressing screw, a first pressing nut, and a first AGC cylinder. The first transmission mechanism is connected to a synchronization mechanism. The upper part of the first pressing screw is connected to the first transmission mechanism, and the lower part is connected to the first pressing nut. The bottom end of the first pressing screw is connected to the first AGC cylinder.

[0013] The operating side pressing device includes a second transmission mechanism, a second pressing screw, a second pressing nut, and a second AGC cylinder. The second transmission mechanism is connected to a synchronization mechanism. The upper part of the second pressing screw is connected to the second transmission mechanism, and the lower part is connected to the second pressing nut. The bottom end of the second pressing screw is connected to the second AGC cylinder.

[0014] Furthermore, the first transmission mechanism includes a first motor, a first base, a first coupling, a first reducer, a second coupling, a second reducer, a first brake, and a second base. The first motor is mounted on the first base. The first motor is connected to the first reducer via the first coupling. The first reducer is connected to the second reducer via the second coupling. The second reducer is connected to the first brake and a synchronization mechanism. The first brake is mounted on the second base. The first pressing screw is connected to the first reducer above it.

[0015] Furthermore, the first motor is equipped with an encoder, the first base is a welded structural component, and both the first and second couplings are flexible couplings; the first reducer is a worm gear reducer with a speed ratio of 20, and both ends of the worm gear reducer are connected to the first and second couplings; the second reducer is a single-input dual-output reducer with a speed ratio of 1, which realizes a 90° rotation in the transmission direction and transmits torque to the first brake.

[0016] Furthermore, the first pressing screw and the first pressing nut form a threaded pair, which converts the rotational motion into linear motion, and the thread is a double-threaded thread;

[0017] The first pressing screw is equipped with a built-in displacement sensor; a first protective cover is provided on the outside of the first pressing screw, and the first protective cover is located below the first pressing nut;

[0018] The first AGC cylinder is equipped with a built-in displacement sensor with a position resolution of 0.001 mm.

[0019] Furthermore, the second transmission mechanism includes a second motor, a third base, a third coupling, a third reducer, a fourth coupling, a fourth reducer, a second brake, and a fourth base. The second motor is mounted on the third base. The second motor is connected to the third reducer via the third coupling. The third reducer is connected to the fourth reducer via the fourth coupling. The fourth reducer is connected to the second brake and a synchronization mechanism. The second brake is mounted on the fourth base. The upper part of the second pressing screw is connected to the third reducer.

[0020] Furthermore, the second motor is equipped with an encoder, the third base is a welded structural component, and the third and fourth couplings are both flexible couplings; the third reducer is a worm gear reducer with a speed ratio of 20, and both ends of the worm gear reducer are connected to the third and fourth couplings; the fourth reducer is a single-input dual-output reducer with a speed ratio of 1, which realizes a 90° rotation in the transmission direction and transmits torque to the second brake.

[0021] Furthermore, the second pressing screw and the second pressing nut form a threaded pair, which converts the rotational motion into linear motion, and the thread is a double-threaded thread;

[0022] The second pressing screw is equipped with a built-in displacement sensor; a second protective cover is provided on the outside of the second pressing screw, and the second protective cover is located below the second pressing nut;

[0023] The second AGC cylinder is equipped with a built-in displacement sensor with a position resolution of 0.001 mm.

[0024] Furthermore, the synchronization mechanism includes a fifth coupling, an intermediate shaft, and a sixth coupling. The fifth coupling and the sixth coupling are respectively connected to the two ends of the intermediate shaft. The fifth coupling is connected to the second reducer of the transmission-side pressing device, and the sixth coupling is connected to the fourth reducer of the operation-side pressing device.

[0025] Furthermore, the fifth coupling is a flexible coupling, the intermediate shaft is a hollow shaft, and the sixth coupling is a rigid clamp coupling.

[0026] The present invention also provides a method for operating an electric pressing device for a reversible hot rolling mill, comprising:

[0027] The working method of the transmission-side pressing device is as follows: the first motor drives the first reducer to rotate through the first coupling to achieve the required speed; the first pressing screw completes the vertical displacement with the cooperation of the first pressing nut, driving the first AGC cylinder to complete the pressing operation; the transmission-side pressing device completes the braking operation through the first brake; when the first motor reverses, the transmission-side pressing device achieves the upward action of the transmission-side pressing device.

[0028] The operating method of the operating side pressing device is as follows: the second motor drives the third reducer to rotate through the third coupling to achieve the required speed; the second pressing screw completes the vertical displacement with the cooperation of the second pressing nut, driving the second AGC cylinder to complete the pressing operation; the operating side pressing device completes the braking operation through the second brake; when the second motor reverses, the operating side pressing device will rise.

[0029] During synchronous adjustment, the transmission-side pressing device and the operating-side pressing device achieve mechanical synchronization through a synchronization mechanism.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. This invention relates to a novel electric pressing device consisting of a transmission-side pressing device and an operation-side pressing device. The motor output shaft of the pressing device is arranged parallel to the production line, simplifying the base structure of the pressing device and freeing up vertical space above the rolling mill. On the one hand, the structure of the equipment base and platform is relatively simple, lightweight, and low in manufacturing cost, improving the economic efficiency of the equipment. On the other hand, it increases the vertical space for rolling mill maintenance, facilitates overhead crane lifting operations, solves the problem of blind spots in lifting, and improves the operability and safety of workshop operations.

[0032] 2. The novel electric pressing device of this invention uses a worm gear reducer instead of a cylindrical gear-worm gear combined reducer. The weight of a single reducer is reduced from 4.426 tons to 2.488 tons, and the reducer base is reduced from 0.87 tons to 0.66 tons, resulting in a 42% reduction in equipment weight. Simultaneously, the worm gear reducer in the novel electric pressing device is a single-stage transmission, resulting in high transmission efficiency. This simplifies the reducer structure, reduces potential failure points, lowers the equipment failure rate, and improves operational reliability.

[0033] 3. The novel electric pressing device of this invention employs mechanical synchronization through a composite synchronization mechanism of a flexible coupling, an intermediate shaft, and a rigid coupling. The flexible coupling can compensate for deformation and errors caused by axial, angular, and misalignment, achieving elastic synchronous rotation. However, when the transmission-side pressing device or the operation-side pressing device needs to operate independently, the rigid coupling can allow for arbitrary adjustment of the relative angle. This improves the operability of the equipment and enhances the synchronization accuracy of the mechanism.

[0034] 4. The novel electric pressing device of the present invention is equipped with brakes on the transmission side and the operation side respectively, and has an independent braking function to meet the production needs of equipment debugging, roll gap zeroing and normal rolling.

[0035] Based on the above reasons, this invention can be widely promoted in fields such as reversible hot rolling mills. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a traditional electric pressing device.

[0038] Figure 2 This is a top view of the electric pressing device in this invention.

[0039] Figure 3 This is a left view of the electric pressing device in this invention.

[0040] Figure 4 This is a top view of the transmission-side pressing device in this invention.

[0041] Figure 5 This is a left view of the transmission-side pressing device in this invention.

[0042] Figure 6 This is a top view of the operating side pressing device in this invention.

[0043] Figure 7 This is a left view of the operating side pressing device in this invention.

[0044] Figure 8 This is a top view of the synchronization mechanism in this invention.

[0045] In the diagram: 1. Transmission-side pressing device; 2. Operation-side pressing device; 3. Synchronization mechanism;

[0046] 101. First electric motor; 102. First base; 103. First coupling; 104. First reducer; 105. Second coupling; 106. Second reducer; 107. First brake; 108. Second base; 109. First pressing screw; 110. First pressing nut; 111. First protective cover; 112. First AGC cylinder;

[0047] 201. Second motor; 202. Third base; 203. Third coupling; 204. Third reducer; 205. Fourth coupling; 206. Fourth reducer; 207. Second brake; 208. Fourth base; 209. Second press-down screw; 210. Second press-down nut; 211. Second protective cover; 212. Second AGC cylinder;

[0048] 301, Fifth coupling; 302, Intermediate shaft; 303, Sixth coupling. Detailed Implementation

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0053] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0056] This invention provides an electric reduction device and method for a reversible hot rolling mill, specifically a novel electric reduction device and method for a reversible hot rolling mill, belonging to the metallurgical industry and applicable to the reduction system of hot rolling mills in the metallurgical industry. It particularly relates to the reduction system of a reversible hot rolling mill, and more specifically to an electric reduction system for a reversible hot rolling mill.

[0057] The roll reduction device of this invention is applied to the electric roll reduction system of a reversible hot rolling mill, mainly for adjusting the roll gap. This invention provides a novel electric roll reduction device for a reversible hot rolling mill (e.g., Figure 2 , Figure 3 It mainly includes a transmission-side pressing device 1, an operating-side pressing device 2, and a synchronization mechanism 3. The detailed structure is as follows:

[0058] In this invention, the transmission-side pressing device 1 (such as...) Figure 4 , Figure 5 It mainly consists of a first motor 101, a first base 102, a first coupling 103, a first reducer 104, a second coupling 105, a second reducer 106, a first brake 107, a second base 108, a first pressing screw 109, a first pressing nut 110, a first protective cover 111, and a first AGC cylinder 112. The first motor 101 is mounted on the first base 102. The first motor 101 is connected to the first reducer 104 via the first coupling 103. The first reducer 104 is connected to the second reducer 106 via the second coupling 105. The second reducer 106 is connected to the first brake 107 and the synchronization mechanism 3. The first brake 107 is mounted on the second base 108. The upper part of the first pressing screw 109 is connected to the first reducer 104, and the lower part is connected to the first pressing nut 110. The bottom end of the first pressing screw 109 is connected to the first AGC cylinder 112. A first protective cover 111 is provided on the outside of the first pressing screw 109, located below the first pressing nut 110. The first motor 101 provides power to the transmission-side pressing device 1. This motor is equipped with an encoder, which provides closed-loop data feedback to the control system when the roll gap undergoes large stroke adjustment. The first base 102 is a welded structure used to bear the working load of the first motor 101. The first coupling 103 is a flexible coupling used to transmit torque. It also compensates for deformation and errors caused by axial, angular, and misalignment, achieving elastic synchronous rotation. The first reducer 104 is a worm gear reducer with a speed ratio of 20, reducing the rotational speed of the first motor 101 to the required speed. Both ends of this worm gear reducer are connected to the first coupling 103 and the second coupling 105. The second coupling 105 is a flexible coupling, achieving elastic synchronous rotation. The second reducer 106 is a single-input, dual-output reducer with a speed ratio of 1, achieving a 90° rotation in the transmission direction and simultaneously transmitting torque to the first brake 107. The first brake 107 is mounted on the second base 108. The first pressing screw 109 and the first pressing nut 110 form a threaded pair, converting rotational motion into linear motion. Its thread is a double-start thread; on the one hand, the two leads of the double-start thread generate a self-locking effect, preventing the first pressing nut 110 from loosening under vibration or load. On the other hand, the double-threaded design improves mechanical efficiency and meets the needs of rapid adjustment. The first pressing screw 109 is equipped with a built-in displacement sensor to monitor its accurate stroke in real time. The first protective cover 111 prevents lubricating oil leakage, improving the environmental friendliness and safety of the equipment. The first AGC cylinder 112 is equipped with a built-in displacement sensor, providing high roll gap adjustment speed and acceleration. Simultaneously, it offers high adjustment accuracy with a position resolution of 0.001 mm.

[0059] In this invention, the operating side pressing device 2 (such as...) Figure 6, Figure 7 It mainly consists of a second motor 201, a third base 202, a third coupling 203, a third reducer 204, a fourth coupling 205, a fourth reducer 206, a second brake 207, a fourth base 208, a second pressing screw 209, a second pressing nut 210, a second protective cover 211, and a second AGC cylinder 212. The second motor 201 is mounted on the third base 202. The second motor 201 is connected to the third reducer 204 via the third coupling 203. The third reducer 204 is connected to the fourth reducer 206 via the fourth coupling 205. The fourth reducer 206 is connected to the second brake 207 and the synchronization mechanism 3. The second brake 207 is mounted on the fourth base 208. The upper part of the second pressing screw 209 is connected to the third reducer 204, and the lower part is connected to the second pressing nut 210. The bottom end of the second pressing screw 209 is connected to the second AGC cylinder 212. A second protective cover 211 is installed on the outside of the second pressing screw 209, located below the second pressing nut 210. The second motor 201 provides power to the operating side pressing device 2. This motor is equipped with an encoder, which provides closed-loop data feedback to the control system when the roll gap is adjusted over a large stroke. The third base 202 is a welded structure used to bear the working load of the second motor 201. The third coupling 203 is a flexible coupling used to transmit torque. It also compensates for deformation and errors caused by axial, angular, and misalignment, achieving elastic synchronous rotation. The third reducer 204 is a worm gear reducer with a speed ratio of 20, reducing the rotational speed of the second motor 201 to the required speed. Both ends of this worm gear reducer are connected to the third coupling 203 and the fourth coupling 205. The fourth coupling 205 is a flexible coupling, achieving elastic synchronous rotation. The fourth reducer 206 is a single-input, double-output reducer with a speed ratio of 1. It achieves a 90° rotation in the transmission direction and simultaneously transmits torque to the second brake 207. The second brake 207 is mounted on the fourth base 208. The second pressing screw 209 and the second pressing nut 210 form a threaded pair, converting rotational motion into linear motion. Its thread is a double-start thread; on the one hand, the two leads of the double-start thread create a self-locking effect, preventing the second pressing nut 210 from loosening under vibration or load. On the other hand, the double-thread design improves mechanical efficiency and meets the requirements for rapid adjustment. The second pressing screw 209 is equipped with a built-in displacement sensor to monitor its accurate stroke in real time. The second protective cover 211 prevents lubricating oil leakage, improving the equipment's environmental friendliness and safety. The second AGC cylinder 212 is equipped with a built-in displacement sensor, providing high roll gap adjustment speed and acceleration. Simultaneously, it offers high adjustment accuracy with a position resolution of 0.001 mm.

[0060] In this invention, the synchronization mechanism 3 (such as...) Figure 8The system mainly consists of a fifth coupling 301, an intermediate shaft 302, and a sixth coupling 303. The fifth coupling 301 and the sixth coupling 303 are connected to the two ends of the intermediate shaft 302, respectively. The fifth coupling 301 is connected to the second reducer 106 of the transmission-side pressing device 1, and the sixth coupling 303 is connected to the fourth reducer 206 of the operating-side pressing device 2. The fifth coupling 301 is a flexible coupling, which can compensate for deformation and errors caused by axial, angular, and deviation errors, achieving elastic synchronous rotation. The intermediate shaft 302 is a hollow shaft, whose main function is to ensure the mechanical synchronization of the transmission-side pressing device 1 and the operating-side pressing device 2. The sixth coupling 303 is a rigid clamp coupling, which allows for arbitrary adjustment of the relative angle when the transmission-side pressing device 1 or the operating-side pressing device 2 needs to operate independently. This composite synchronization mechanism of flexible coupling + intermediate shaft + rigid coupling improves the operability of the equipment and enhances the synchronization accuracy of the mechanism.

[0061] Working method of electric pressing device for reversible hot rolling mill:

[0062] The operation of the transmission-side pressing device 1 is as follows: The first motor 101 drives the first reducer 104 to rotate through the first coupling 103 to achieve the required speed. The first pressing screw 109, in conjunction with the first pressing nut 110, completes vertical displacement, driving the first AGC cylinder 112 to complete the pressing operation. The transmission-side pressing device 1 completes the braking operation through the first brake 107. When the first motor 101 reverses, the transmission-side pressing device 1 rises.

[0063] The operating method of the operating side pressing device 2 is as follows: the second motor 201 drives the third reducer 204 to rotate through the third coupling 203 to achieve the required speed. The second pressing screw 209, in cooperation with the second pressing nut 210, completes vertical displacement, driving the second AGC cylinder 212 to complete the pressing operation. The operating side pressing device 2 completes the braking operation through the second brake 207. When the second motor 201 reverses, it realizes the upward movement of the operating side pressing device 2.

[0064] During synchronous adjustment, the transmission-side pressing device 1 and the operation-side pressing device 2 achieve mechanical synchronization through the synchronization mechanism 3.

[0065] This invention comprises a transmission-side pressing device and an operating-side pressing device. The motor output shaft is arranged parallel to the production line, simplifying the base structure of the pressing device and freeing up vertical space above the rolling mill. A worm gear reducer is used instead of a cylindrical gear-worm gear combined reducer, simplifying the reducer structure, reducing the reducer failure rate, improving equipment transmission efficiency, and enhancing equipment operational reliability. Mechanical synchronization is employed through a composite synchronization mechanism of flexible coupling + intermediate shaft + rigid coupling, ensuring the synchronization accuracy of the pressing device. Brakes are installed on both the transmission and operating sides, providing independent braking functions to meet the production needs of equipment debugging, roll gap adjustment, and normal rolling.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric pressing device for a reversible hot rolling mill, characterized in that, include: The transmission-side pressing device (1), the operation-side pressing device (2), and the synchronization mechanism (3) are provided. The transmission-side pressing device (1) and the operation-side pressing device (2) are both parallel to the rolling direction. The synchronization mechanism (3) is perpendicular to the rolling direction. One side of the synchronization mechanism (3) is connected to the transmission-side pressing device (1), and the other side is connected to the operation-side pressing device (2). This mechanism is used to achieve mechanical synchronization between the transmission-side pressing device (1) and the operation-side pressing device (2). The transmission side pressing device (1) includes a first transmission mechanism, a first pressing screw (109), a first pressing nut (110), and a first AGC cylinder (112). The first transmission mechanism is connected to the synchronization mechanism (3). The upper part of the first pressing screw (109) is connected to the first transmission mechanism, and the lower part is connected to the first pressing nut (110). The bottom end of the first pressing screw (109) is connected to the first AGC cylinder (112). The operating side pressing device (2) includes a second transmission mechanism, a second pressing screw (209), a second pressing nut (210), and a second AGC cylinder (212). The second transmission mechanism is connected to the synchronization mechanism (3). The upper part of the second pressing screw (209) is connected to the second transmission mechanism, and the lower part is connected to the second pressing nut (210). The bottom end of the second pressing screw (209) is connected to the second AGC cylinder (212). The first transmission mechanism includes a first motor (101), a first base (102), a first coupling (103), a first reducer (104), a second coupling (105), a second reducer (106), a first brake (107), and a second base (108). The first motor (101) is mounted on the first base (102). The first motor (101) is connected to the first reducer (104) through the first coupling (103). The first reducer (104) is connected to the second reducer (106) through the second coupling (105). The second reducer (106) is connected to the first brake (107) and the synchronization mechanism (3). The first brake (107) is mounted on the second base (108). The first pressing screw (109) is connected to the first reducer (104) above it. The second transmission mechanism includes a second motor (201), a third base (202), a third coupling (203), a third reducer (204), a fourth coupling (205), a fourth reducer (206), a second brake (207), and a fourth base (208). The second motor (201) is mounted on the third base (202). The second motor (201) is connected to the third reducer (204) via the third coupling (203). The third reducer (204) is connected to the fourth reducer (206) via the fourth coupling (205). The fourth reducer (206) is connected to the second brake (207) and the synchronization mechanism (3). The second brake (207) is mounted on the fourth base (208). The upper part of the second pressing screw (209) is connected to the third reducer (204). The synchronization mechanism (3) includes a fifth coupling (301), an intermediate shaft (302) and a sixth coupling (303). The fifth coupling (301) and the sixth coupling (303) are respectively connected to the two ends of the intermediate shaft (302). The fifth coupling (301) is connected to the second reducer (106) of the transmission side pressing device (1), and the sixth coupling (303) is connected to the fourth reducer (206) of the operation side pressing device (2). The fifth coupling (301) is a flexible coupling, the intermediate shaft (302) is a hollow shaft, and the sixth coupling (303) is a rigid clamp coupling.

2. The electric pressing device for a reversible hot rolling mill according to claim 1, characterized in that, The first motor (101) is equipped with an encoder, the first base (102) is a welded structural component, and the first coupling (103) and the second coupling (105) are both flexible couplings; the first reducer (104) is a worm gear reducer with a speed ratio of 20, and the two ends of the worm gear reducer are connected to the first coupling (103) and the second coupling (105); the second reducer (106) is a single-input dual-output reducer with a speed ratio of 1, which realizes a 90° rotation in the transmission direction and transmits torque to the first brake (107).

3. The electric pressing device for a reversible hot rolling mill according to claim 1, characterized in that, The first pressing screw (109) and the first pressing nut (110) form a threaded pair, which converts the rotational motion into linear motion, and the thread is a double-threaded thread; The first pressing screw (109) is equipped with a built-in displacement sensor; a first protective cover (111) is provided on the outside of the first pressing screw (109), and the first protective cover (111) is located below the first pressing nut (110); The first AGC cylinder (112) is equipped with a built-in displacement sensor with a position resolution of 0.001 mm.

4. The electric pressing device for a reversible hot rolling mill according to claim 1, characterized in that, The second motor (201) is equipped with an encoder, the third base (202) is a welded structure, and the third coupling (203) and the fourth coupling (205) are both flexible couplings; the third reducer (204) is a worm gear reducer with a speed ratio of 20, and the two ends of the worm gear reducer are connected to the third coupling (203) and the fourth coupling (205); the fourth reducer (206) is a single-input double-output reducer with a speed ratio of 1, which realizes a 90° rotation in the transmission direction and transmits torque to the second brake (207).

5. The electric pressing device for a reversible hot rolling mill according to claim 1, characterized in that, The second pressing screw (209) and the second pressing nut (210) form a threaded pair, which converts the rotational motion into linear motion, and the thread is a double-threaded thread; The second pressing screw (209) is equipped with a built-in displacement sensor; a second protective cover (211) is provided on the outside of the second pressing screw (209), and the second protective cover (211) is located below the second pressing nut (210); The second AGC cylinder (212) is equipped with a built-in displacement sensor with a position resolution of 0.001 mm.

6. A method for operating the electric pressing device for a reversible hot rolling mill as described in any one of claims 1-5, characterized in that, include: The working method of the transmission side pressing device (1) is as follows: the first motor (101) drives the first reducer (104) to rotate through the first coupling (103) to achieve the required speed; the first pressing screw (109) completes the vertical displacement under the cooperation of the first pressing nut (110), driving the first AGC cylinder (112) to complete the pressing operation; the transmission side pressing device (1) completes the braking operation through the first brake (107), and the first motor (101) reverses to realize the upward action of the transmission side pressing device (1); The working method of the operating side pressing device (2) is as follows: the second motor (201) drives the third reducer (204) to rotate through the third coupling (203) to achieve the required speed; the second pressing screw (209) completes the vertical displacement with the cooperation of the second pressing nut (210), driving the second AGC cylinder (212) to complete the pressing operation; the operating side pressing device (2) completes the braking operation through the second brake (207), and the second motor (201) realizes the upward action of the operating side pressing device (2) when it reverses; During synchronous adjustment, the transmission side pressing device (1) and the operation side pressing device (2) achieve mechanical synchronization through the synchronization mechanism (3).

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