Single-machine reversible rolling mill and strip steel rolling system

Abstract

The utility model discloses a single-machine reversible rolling mill and a strip steel rolling system, which are applied to the field of strip steel rolling. A roller assembly; a first code disc and a second code disc; the thickness gauge is installed on the rack, located on the first side of the roller assembly and used for obtaining the thickness of the strip steel on the first side; the control system is connected with the roller assembly, the first code disc, the second code disc and the thickness gauge and used for determining the thickness of the strip steel on the second side according to the moving speed of the strip steel on the first side, the moving speed of the strip steel on the second side and the thickness of the strip steel on the first side. And the roller gap width of the roller assembly is controlled according to the thickness of the strip steel on the first side or the thickness of the strip steel on the second side. According to the single-machine reversible rolling mill, one thickness gauge is omitted, and the single-machine reversible rolling mill is simple in structure, low in investment, high in thickness precision and high in reliability and can be applied to the field of cold rolling single-machine reversible rolling mill systems.

Description

Technical Field

[0001] The utility model relates to the field of strip steel rolling, in particular to a single-machine reversible rolling mill and a strip steel rolling system. Background Art

[0002] During the rolling process of a single-machine reversing rolling mill, a dual thickness gauge rolling production mode is often used, that is, thickness gauges are arranged before and after the roll assembly, and the thickness of the strip before and after rolling is obtained through the thickness gauge.

[0003] However, in the related art, during the rolling production process of strip steel, the thickness gauge is very likely to malfunction and fail due to factors such as the service life of the equipment and the equipment operating conditions, which can easily affect the production rhythm, resulting in a high cost of thickness gauge spare parts, and will affect the rolling processing accuracy of the strip steel.

[0004] Therefore, how to effectively improve the thickness accuracy requirements of the finished product of cold-rolled strip during the rolling process while reducing costs is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0005] The purpose of the utility model is to provide a single-machine reversible rolling mill and a strip steel rolling system, which are used to reduce the cost pressure of thickness gauge spare parts and improve reliability.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A single-machine reversible rolling mill, comprising:

[0008] frame;

[0009] A roller assembly is installed on the frame, for allowing the strip steel to pass through and for rolling the strip steel;

[0010] a first code disc and a second code disc, wherein the first code disc is mounted on a first side of the roll assembly and is used to obtain a moving speed of the steel strip on the first side, and the second code disc is mounted on a second side of the roll assembly and is used to obtain a moving speed of the steel strip on the second side, the first side and the second side being located at an entrance and an exit of the roll assembly, respectively;

[0011] a thickness gauge, mounted on the frame and located on a first side of the roll assembly, for obtaining the thickness of the steel strip on the first side;

[0012] A control system is connected to the roll assembly, the first code disc, the second code disc and the thickness gauge, and is used to determine the thickness of the strip on the second side based on the moving speed of the strip on the first side, the moving speed of the strip on the second side, and the thickness of the strip on the first side, and to control the roll gap width of the roll assembly based on the thickness of the strip on the first side or the thickness of the strip on the second side.

[0013] On the other hand, the rolling roller assembly includes a feed roller, a working roller and a discharge roller, the working roller is located between the feed roller and the discharge roller, and the first code disc and the second code disc are respectively installed on the transmission shafts of the feed roller and the discharge roller.

[0014] On the other hand, it also includes a first traction assembly located on a first side of the roll assembly, and a second traction assembly and a third traction assembly located on a second side of the roll assembly, wherein the second traction assembly is located between the roll assembly and the third traction assembly.

[0015] On the other hand, the first traction assembly, the second traction assembly and the third traction assembly are all mounted on the frame and connected to the control system.

[0016] On the other hand, the thickness gauge is installed between the first traction assembly and the roller assembly.

[0017] On the other hand, it also includes a tension detection component for obtaining the tension of the strip; the tension detection component is connected to the control system, and the control system is also used to control the start-up of the roller assembly when the tension of the strip reaches the target tension range.

[0018] In another aspect, the control system comprises:

[0019] an acquisition module, connected to the roll assembly, the first code disc, the second code disc, and the thickness gauge, for acquiring a moving speed of the steel strip on the first side, a moving speed of the steel strip on the second side, and a thickness of the steel strip on the first side to determine the thickness of the steel strip on the second side;

[0020] a calculation module, configured to determine the thickness of the steel strip on the second side based on a moving speed of the steel strip on the first side, a moving speed of the steel strip on the second side, a thickness of the steel strip on the first side, and a principle of constant volume of deformed metal;

[0021] a judgment module, configured to judge whether the thickness of the steel strip on the first side exceeds a first target thickness, and further configured to judge whether the thickness of the steel strip on the second side exceeds a second target thickness;

[0022] The AGC thickness control module is configured to adjust the roll gap width of the roll assembly when the thickness of the steel strip on the first side exceeds a first target thickness or the thickness of the steel strip on the second side exceeds a second target thickness.

[0023] On the other hand, the AGC thickness control module includes a feedforward AGC thickness control module and a monitoring AGC thickness control module; the feedforward AGC thickness control module is used to control the roll gap width of the roll assembly according to the thickness of the strip on the second side when the strip is rolled from the first side to the second side of the roll assembly; the monitoring AGC thickness control module is used to control the roll gap width of the roll assembly according to the thickness of the strip on the first side when the strip is rolled from the second side to the first side of the roll assembly.

[0024] On the other hand, the control system further includes: a rolling speed control module, which is used to adjust the rolling speed of the roll assembly to 0.8-1.2 m / s when the roll gap width of the roll assembly is pressed down to the target roll gap width.

[0025] A strip steel rolling system comprises a single-machine reversible rolling mill, wherein the single-machine reversible rolling mill is the above-mentioned single-machine reversible rolling mill.

[0026] The single-machine reversible rolling mill provided by the present invention includes: a frame; a roll assembly, mounted on the frame, for allowing strip steel to pass through and rolling the strip steel; a first code disc and a second code disc, the first code disc being mounted on the first side of the roll assembly, for obtaining the moving speed of the strip steel on the first side, and the second code disc being mounted on the second side of the roll assembly, for obtaining the moving speed of the strip steel on the second side, the first side and the second side being located at the entrance and exit of the roll assembly, respectively; a thickness gauge, mounted on the frame, and located on the first side of the roll assembly, for obtaining the thickness of the strip steel on the first side; a control system, connected to the roll assembly, the first code disc, the second code disc and the thickness gauge, for determining the thickness of the strip steel on the second side according to the moving speed of the strip steel on the first side, the moving speed of the strip steel on the second side and the thickness of the strip steel on the first side, and controlling the roll gap width of the roll assembly according to the thickness of the strip steel on the first side or the thickness of the strip steel on the second side. The present invention provides a single-unit reversible rolling mill. The thickness gauge is disposed on the first side of the roll assembly to obtain the thickness of the steel strip on the first side. The first and second code discs are used to respectively obtain the moving speeds of the steel strip on the first and second sides. The thickness of the steel strip on the first side and the moving speeds of the steel strip on the first and second sides are then calculated based on the principle of constant volume of deformed metal using the thickness of the steel strip on the first side and the moving speeds of the steel strip on the first and second sides. This configuration requires only one thickness gauge, i.e., a single-side thickness gauge configuration reduces investment costs, reduces the cost burden of thickness gauge spare parts, and can reduce the cost of handling radioactive hazardous waste after the thickness gauge fails. Furthermore, the use of one thickness gauge is saved, which facilitates the structural layout of the rolling mill, making it more compact and space-saving, improving the rolling yield rate of the steel strip, and significantly improving the thickness accuracy requirements of the finished steel strip. The single-unit reversible rolling mill has a simple structure, low investment, high thickness accuracy, and high reliability, and can be applied in the field of cold rolling single-unit reversible rolling mill systems.

[0027] The strip rolling system provided by the present invention is provided with the above-mentioned single-machine reversible rolling mill. Since the single-machine reversible rolling mill has the above-mentioned technical effects, the strip rolling system provided with the single-machine reversible rolling mill should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of a specific embodiment of a single-machine reversible rolling mill provided by the utility model;

[0030] Figure 2 This is a schematic diagram of the rolling structure of a single reversible rolling mill provided by the present invention in a cardinal number of passes;

[0031] Figure 3 This is a schematic diagram of the rolling structure of a single reversible rolling mill provided by the present invention in an even-numbered pass;

[0032] Figure 4 This is a connection diagram of the control system in a single-machine reversible rolling mill provided by the present invention.

[0033] Reference numerals:

[0034] Roll assembly 1; working roll 11; first code disc 2; second code disc 3; thickness gauge 4; control system 5; acquisition module 51; calculation module 52; judgment module 53; AGC thickness control module 54; first traction assembly 6; second traction assembly 7; third traction assembly 8. DETAILED DESCRIPTION

[0035] The core of the utility model is to provide a single-machine reversible rolling mill and a strip steel rolling system, which can effectively reduce the cost of strip steel rolling processing and improve reliability and processing accuracy.

[0036] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0037] Please refer to Figures 1 to 4 , Figure 1 This is a structural diagram of a specific embodiment of a single-machine reversible rolling mill provided by the utility model; Figure 2 This is a schematic diagram of the rolling structure of a single reversible rolling mill provided by the present invention in a cardinal number of passes; Figure 3 This is a schematic diagram of the rolling structure of a single reversible rolling mill provided by the present invention in an even-numbered pass; Figure 4 This is a connection diagram of the control system in a single-machine reversible rolling mill provided by the present invention.

[0038] In this embodiment, the single-machine reversing rolling mill includes:

[0039] frame;

[0040] Roller assembly 1, mounted on a frame, for the strip to pass through and for rolling the strip;

[0041] A first code disc 2 and a second code disc 3, wherein the first code disc 2 is mounted on a first side of the roll assembly 1 and is used to obtain the moving speed of the strip on the first side, and the second code disc 3 is mounted on a second side of the roll assembly 1 and is used to obtain the moving speed of the strip on the second side. The first side and the second side are located at the entrance and exit of the roll assembly 1, respectively;

[0042] a thickness gauge 4, mounted on the frame and located on a first side of the roll assembly 1, for obtaining the thickness of the strip on the first side;

[0043] The control system 5 is connected to the roll assembly 1, the first code disc 2, the second code disc 3 and the thickness gauge 4, and is used to determine the thickness of the strip on the second side based on the moving speed of the strip on the first side, the moving speed of the strip on the second side, and the thickness of the strip on the first side, and to control the roll gap width of the roll assembly 1 based on the thickness of the strip on the first side or the thickness of the strip on the second side.

[0044] The single-machine reversible rolling mill provided by the utility model obtains the thickness of the strip on the first side by disposing a thickness gauge 4 on the first side of the roll assembly 1, and obtains the moving speed of the strip on the first and second sides respectively by using the setting of the first code disc 2 and the second code disc 3. Then, the thickness of the strip on the first side and the moving speed of the strip on the first and second sides are calculated based on the principle of constant volume of deformed metal. With this arrangement, only one thickness gauge 4 is required, that is, the method of disposing the thickness gauge 4 on a single side reduces investment costs, reduces the cost pressure of spare parts for the thickness gauge 4, and can reduce the cost of handling radioactive hazardous waste after the thickness gauge 4 fails. In addition, the use of one thickness gauge 4 is saved, and the structural layout of the rolling mill is facilitated, making it more compact and space-saving, improving the rolling yield rate of the strip, and significantly improving the thickness accuracy requirements of the finished strip. The single-machine reversible rolling mill has a simple structure, low investment, high thickness accuracy, and high reliability, and can be applied to the field of cold rolling single-machine reversible rolling mill systems. Specifically, the present invention provides a rolling mill with a single thickness gauge 4 on the finished product side, based on the principle of constant volume of deformed metal. The speed data is measured by the entry and exit code disks, namely the first V1 of the strip and the moving speed V2 of the strip on the second side, and the thickness H of the strip on the first side of the roller assembly 1 measured by the thickness gauge 4. Because in the cold rolling process, due to tension rolling and a large width-to-thickness ratio, the width change before and after rolling can be ignored; therefore, on the second side without the thickness gauge 4, that is, the calculation side, the thickness h of the strip should satisfy: V2*h=V1*H. Through logical calculation, the thickness h of the strip on the calculation side without the thickness gauge 4 is obtained. The data are then fed back to the thickness control system 5 to achieve thickness control through monitoring AGC and feedforward AGC. The present invention can meet the requirements of cold-rolled strip thickness precision control and can be widely used in production systems with the same working conditions.

[0045] In some embodiments, the rolling mill assembly 1 includes a feed roller, a working roller 11 and a discharge roller, the working roller 11 is located between the feed roller and the discharge roller, and the first code disc 2 and the second code disc 3 are respectively installed on the drive shafts of the feed roller and the discharge roller; the first code disc 2 and the second code disc 3 are used to obtain the angular velocity of the drive shafts of the feed roller and the discharge roller, and convert it into a linear velocity, which is used as the moving speed of the strip.

[0046] In some embodiments, the rolling mill further includes a first traction assembly 6 located on a first side of the roll assembly 1, and a second traction assembly 7 and a third traction assembly 8 located on a second side of the roll assembly 1, with the second traction assembly 7 located between the roll assembly 1 and the third traction assembly 8. Specifically, the first traction assembly 6, the second traction assembly 7, and the third traction assembly 8 are used to control the tension of the steel strip. During the first and second rolling passes, since there are no jaws, the second traction assembly 7 is used to pull the steel strip, and the hydraulic cylinder is used to secure the steel strip. That is, except for the transition between the first and second passes, which requires stopping the machine and opening the roll gap of the roll assembly 1, this operation does not need to be repeated for subsequent passes.

[0047] In some embodiments, the first traction assembly 6 , the second traction assembly 7 and the third traction assembly 8 are all installed on the frame and connected to the control system 5 for controlling the tension of the strip.

[0048] In some embodiments, the thickness gauge 4 is installed between the first traction assembly 6 and the roll assembly 1 to detect the thickness of the strip located on the first side of the roll assembly 1. The thickness gauge 4 can be installed on the frame or fixed by other supporting structures.

[0049] In some embodiments, a tension detection component is further included for obtaining the tension of the strip; the tension detection component is connected to the control system 5, and the control system 5 is also used to control the roller assembly 1 to start when the tension of the strip reaches the target tension range.

[0050] In some embodiments, the control system 5 includes:

[0051] An acquisition module 51 is connected to the roll assembly 1, the first code disc 2, the second code disc 3, and the thickness gauge 4, and is used to acquire the moving speed of the strip on the first side, the moving speed of the strip on the second side, and the thickness of the strip on the first side to determine the thickness of the strip on the second side;

[0052] a calculation module 52 for determining the thickness of the steel strip on the second side based on a moving speed of the steel strip on the first side, a moving speed of the steel strip on the second side, a thickness of the steel strip on the first side, and a principle of constant volume of deformed metal;

[0053] a judgment module 53, configured to judge whether the thickness of the steel strip on the first side exceeds a first target thickness, and further configured to judge whether the thickness of the steel strip on the second side exceeds a second target thickness;

[0054] The AGC thickness control module 54 is configured to adjust the roll gap width of the roll assembly 1 when the strip thickness on the first side exceeds a first target thickness or when the strip thickness on the second side exceeds a second target thickness. Specifically, the acquisition module 51, calculation module 52, determination module 53, and AGC thickness control module 54 may be integrated into the same device or provided separately.

[0055] In some embodiments, the AGC thickness control module 54 includes a feedforward AGC thickness control module 54 and a monitoring AGC thickness control module 54; the feedforward AGC thickness control module 54 is used to control the roll gap width of the roll assembly 1 according to the thickness of the strip on the second side when the strip is rolled from the first side to the second side of the roll assembly 1; the monitoring AGC thickness control module 54 is used to control the roll gap width of the roll assembly 1 according to the thickness of the strip on the first side when the strip is rolled from the second side to the first side of the roll assembly 1; the feedforward AGC thickness control module 54 and the monitoring AGC thickness control module 54 are both integrated in the AGC thickness control module 54, which are existing control modules in the relevant technology. Automatic control is performed with the help of the existing control modules, which facilitates operation and ensures processing accuracy.

[0056] In some embodiments, the control system 5 further includes: a rolling speed control module, which is used to adjust the rolling speed of the roll assembly 1 to 0.8-1.2 m / s, which can be 1 m / s, when the roll gap width of the roll assembly 1 is pressed down to the target roll gap width.

[0057] The rolling method using the above-mentioned single-machine reversible rolling mill comprises the following steps:

[0058] Obtaining the moving speed of the steel strip on the first side, the moving speed of the steel strip on the second side, and the thickness of the steel strip on the first side to determine the thickness of the steel strip on the second side;

[0059] for determining the thickness of the steel strip on the second side based on the moving speed of the steel strip on the first side, the moving speed of the steel strip on the second side, the thickness of the steel strip on the first side, and the principle that the volume of the deformed metal remains unchanged;

[0060] When the thickness of the steel strip on the first side exceeds the first target thickness or the thickness of the steel strip on the second side exceeds the second target thickness, the roll gap width of the roll assembly 1 is adjusted.

[0061] The single-machine reversible rolling mill rolling method provided by the utility model calculates the thickness of the strip on the second side of the roll assembly 1 by obtaining the moving speed of the strip on the first side of the roll assembly 1, the moving speed of the strip on the second side of the roll assembly 1, and the thickness of the strip on the first side of the roll assembly 1, and automatically adjusts the roll gap width of the roll assembly 1 according to the thickness of the strip on the first side or the thickness change of the strip on the second side, thereby saving the use of the thickness gauge 4 on one side and saving costs; the above-mentioned parameter model is easy to obtain and convenient to operate, which is conducive to realizing automatic control with high efficiency and good reliability.

[0062] In some embodiments, the steps are further included:

[0063] The strip is tensioned and the thickness gauge 4 is put into operation to measure the thickness H of the strip on the first side. The roll gap width of the roll assembly 1 is controlled to decrease. When the rolling force is preloaded to the prescribed setting value, the roll assembly 1 is started.

[0064] measuring the moving speed v1 and the moving speed v2 of the strip on the first side and the second side of the roll assembly 1, calculating the thickness h of the strip on the second side based on the thickness H, the moving speed v1 and the moving speed v2, and transmitting the thickness H, the moving speed v1, the moving speed v2 and the thickness h of the strip on the second side to the AGC control module;

[0065] The roll gap of the roll assembly 1 is manually controlled to be pressed down to the thickness set in the specification table, and the speed is increased. When the rolling speed increases to 0.8-1.2 m / s, the monitoring AGC thickness control module 54 or the feedforward AGC thickness control module 54 is automatically activated; the speed is increased to the speed set in the specification and rolling is continued until the first rolling pass is completed and the strip is discharged from the coiler;

[0066] In addition, the rolling direction of the strip is determined, and when the strip is rolled from the second side to the first side of the roll assembly 1, the monitoring AGC thickness control module 54 is put into use, and when the strip is rolled from the first side to the second side of the roll assembly 1, the feedforward AGC thickness control module 54 is put into use.

[0067] In some embodiments, the steps are further included:

[0068] When the strip is rolled from the second side to the first side of the roll assembly 1 and the AGC thickness control module 54 is activated, the difference ΔH between the thickness H of the strip on the first side and the first target thickness fluctuates. At this time, the thickness H of the strip on the first side and the moving speed v1 are transmitted to the AGC thickness control module 54. The AGC thickness control module 54 outputs a corresponding adjustment of the roll gap to achieve automatic control of the roll gap thickness.

[0069] When the strip is rolled from the first side to the second side of the roll assembly 1 and the feedforward AGC thickness control module 54 is put into operation, the difference Δh between the thickness h of the strip on the second side and the second target thickness fluctuates. At this time, the thickness H of the strip on the first side and the moving speed v1 are transmitted to the AGC thickness control module 54, and the feedforward AGC thickness control module 54 outputs the corresponding adjustment of the roll gap to realize automatic control of the thickness of the roll gap.

[0070] In a specific embodiment, the single-machine reversible rolling mill and strip rolling system adopts the automatic AGC thickness control module 54 and only applies the monitoring AGC thickness control module 54 and the feedforward AGC thickness control module 54. Because the thickness on the side other than the thickness gauge 4 is a calculated value based on the law of constant volume of deformed metal, the rolling mill cannot apply the flow AGC control module; and it is suitable for odd-numbered rolling passes, and the first pass is rolling from the second side to the first side of the roll assembly 1. It is suitable for odd-numbered passes in order to ensure that the final strip product is rolled out from the direction where the thickness gauge 4 is provided, so as to ensure the accuracy of the thickness of the strip product.

[0071] The specific application steps are:

[0072] The strip is rolled in the first pass from the second side of the roll assembly 1 to the first side;

[0073] The uncoiler uncoils and loads the strip, inserts the strip, enters the jaws of the coiler for clamping, starts the machine, establishes tension, and puts the thickness gauge 4 into use to measure the thickness H of the strip on the first side. The roll gap is pressed down. When the rolling force is pre-pressed to the value set in the specification, the rolling mill is started. At this time, the measurement speed data of the first code disk 2 and the second code disk 3 are quickly obtained to obtain the moving speed v1 and the moving speed v2 of the strip on the first side and the second side of the roll assembly 1. According to the thickness H, the moving speed v1 and the moving speed v2, the thickness h of the strip on the second side is calculated, and the thickness H, the moving speed v1, the moving speed v2 and the thickness h of the strip on the second side are transmitted to the AGC control module; the roll gap of the roll assembly 1 is manually controlled to be pressed down to the thickness set in the specification table, and the rolling speed is increased. When the rolling speed increases to 0.8-1.2m / s, the monitoring AGC thickness control module 54 is automatically put into use; the speed is increased to the speed set in the specification and rolled until the first rolling pass is completed and the strip leaves the coiler.

[0074] The strip is rolled in a second pass from the first side to the second side of the roll assembly 1;

[0075] Open the roll gap, pull the remaining unrolled strip to the upper part of the right coiler by the left coiler, reverse the strip, and pass the head of the strip to the right coiler jaws for clamping; start the machine, establish tension, put the thickness gauge 4 into use, measure the thickness H, press the roll gap down, when the rolling force is pre-pressed to the set value of the regulation, start the rolling mill, and quickly start to obtain the measurement speed data of the first code disc 2 and the second code disc 3, so as to obtain the moving speed v1 and moving speed v2 of the strip on the first side and the second side of the roll assembly 1, and according to the thickness The thickness H, moving speed v1 and moving speed v2 are used to calculate the thickness h of the strip on the second side, and the thickness H, moving speed v1, moving speed v2 and the thickness h of the strip on the second side are transmitted to the AGC control module; the roll gap of the roll assembly 1 is manually controlled to be pressed down to the thickness set in the specification table, and the speed is increased for rolling. When the rolling speed is increased to 0.8-1.2m / s, the feedforward AGC thickness control module 54 is automatically put into operation; the speed is increased to the speed set in the specification and rolling is carried out until the second rolling pass is completed.

[0076] The strip is rolled in the first pass from the second side of the roll assembly 1 to the first side;

[0077] The tension is established to the set value in the specification, and the thickness gauge 4 is put into use to measure the thickness H of the strip on the first side. When the rolling force is pre-pressed to the set value in the specification, the measurement speed data of the first code disc 2 and the second code disc 3 are quickly obtained, so as to obtain the moving speed v1 and the moving speed v2 of the strip on the first side and the second side of the roll assembly 1. According to the thickness H, the moving speed v1 and the moving speed v2, the thickness h of the strip on the second side is calculated, and the thickness H, the moving speed v1, the moving speed v2 and the thickness h of the strip on the second side are transmitted to the AGC control module; the roll gap of the roll assembly 1 is manually controlled to be pressed down to the thickness set in the specification table, and the speed is increased. When the rolling speed is increased to 0.8-1.2m / s, the monitoring AGC thickness control module 54 is automatically put into use; the speed is increased to the speed set in the specification and rolling is carried out until the third rolling pass is completed;

[0078] The strip is rolled in the fourth pass from the first side to the second side of the roll assembly 1;

[0079] Establish tension to the program setting value, put the thickness gauge 4 into use, measure the thickness H of the strip on the first side, and when the rolling force is pre-pressed to the program setting value, quickly start to obtain the measurement speed data of the first code disc 2 and the second code disc 3, so as to obtain the moving speed v1 and moving speed v2 of the strip on the first side and the second side of the roll assembly 1, and calculate the thickness h of the strip on the second side according to the thickness H, moving speed v1 and moving speed v2, and transmit the thickness H, moving speed v1, moving speed v2 and the thickness h of the strip on the second side to the AGC control module; manually control the roll gap of the roll assembly 1 to be pressed down to the thickness set in the program table, increase the speed and roll. When the rolling speed increases to 0.8-1.2m / s, the feedforward AGC thickness control module 54 is automatically put into use; increase the speed to the program setting speed and roll until the fourth rolling pass is completed.

[0080] The strip is rolled in the fifth pass, i.e., the finishing pass, where the strip is rolled from the second side to the first side of the roll assembly 1;

[0081] Establish tension to the set value in the procedure, put the thickness gauge 4 into use, and measure the thickness H of the strip on the first side. When the rolling force is pre-loaded to the set value in the procedure, quickly start to obtain the measurement speed data of the first code disc 2 and the second code disc 3, so as to obtain the moving speed v1 and the moving speed v2 of the strip on the first side and the second side of the roll assembly 1. According to the thickness H, the moving speed v1 and the moving speed v2, calculate the thickness h of the strip on the second side, and transmit the thickness H, the moving speed v1, the moving speed v2 and the thickness h of the strip on the second side to the AGC control module; manually control the roll gap of the roll assembly 1 to be pressed down to the thickness set in the procedure table, increase the speed and roll. When the rolling speed increases to 0.8-1.2m / s, the monitoring AGC thickness control module 54 is automatically put into use; increase the speed to the set speed in the procedure and roll until the fifth rolling pass is completed, remove the tension, lift the roll gap, unload the rolled product, pack it and transport it to the next process.

[0082] The rolling mill and rolling method calculate and simulate the thickness data of the strip on the second side where the thickness gauge 4 is not provided, through the law of constant volume of deformed metal, and then realize precise control of the thickness through the monitoring AGC thickness control module 54 and the feedforward AGC thickness control module 54 in the thickness control system 5.

[0083] In addition to the above-mentioned single-machine reversible rolling mill, the present invention also provides a strip rolling system, including the above-mentioned single-machine reversible rolling mill. Other structures of the strip rolling system can refer to relevant technologies and will not be described in detail here.

[0084] The above is a detailed introduction to the stand-alone reversible rolling mill and strip rolling system provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the stand-alone reversible rolling mill rolling method and its core concept of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A single-machine reversible rolling mill, characterized in that: include: frame; A roller assembly (1) is mounted on the frame, for allowing the steel strip to pass through and for rolling the steel strip; a first code disc (2) and a second code disc (3), wherein the first code disc (2) is mounted on a first side of the roll assembly (1) and is used to obtain the moving speed of the steel strip on the first side, and the second code disc (3) is mounted on a second side of the roll assembly (1) and is used to obtain the moving speed of the steel strip on the second side, the first side and the second side being located at an inlet and an outlet of the roll assembly (1), respectively; a thickness gauge (4), mounted on the frame and located on a first side of the roll assembly (1), for obtaining the thickness of the steel strip on the first side; A control system (5) is connected to the roll assembly (1), the first code disc (2), the second code disc (3) and the thickness gauge (4), and is used to determine the thickness of the steel strip on the second side based on the moving speed of the steel strip on the first side, the moving speed of the steel strip on the second side and the thickness of the steel strip on the first side, and to control the roll gap width of the roll assembly (1) based on the thickness of the steel strip on the first side or the thickness of the steel strip on the second side.

2. The single-machine reversing rolling mill according to claim 1, characterized in that: The roller assembly (1) comprises an infeed roller, a working roller (11) and an outfeed roller, wherein the working roller (11) is located between the infeed roller and the outfeed roller, and the first code disc (2) and the second code disc (3) are respectively mounted on the transmission shafts of the infeed roller and the outfeed roller.

3. The single-machine reversible rolling mill according to claim 1, characterized in that: The invention also comprises a first traction assembly (6) located on a first side of the roller assembly (1), and a second traction assembly (7) and a third traction assembly (8) located on a second side of the roller assembly (1), wherein the second traction assembly (7) is located between the roller assembly (1) and the third traction assembly (8).

4. The single-machine reversible rolling mill according to claim 3, characterized in that: The first traction assembly (6), the second traction assembly (7) and the third traction assembly (8) are all mounted on the frame and connected to the control system (5).

5. The single-machine reversing rolling mill according to claim 4, characterized in that: The thickness gauge (4) is installed between the first traction assembly (6) and the roller assembly (1).

6. The single-machine reversing rolling mill according to claim 4, characterized in that: It also includes a tension detection component for obtaining the tension of the strip steel; the tension detection component is connected to the control system (5), and the control system (5) is also used to control the roller assembly (1) to start when the tension of the strip steel reaches a target tension range.

7. The single-machine reversing rolling mill according to any one of claims 1 to 6, characterized in that: The control system (5) comprises: an acquisition module (51), connected to the roll assembly (1), the first code disc (2), the second code disc (3) and the thickness gauge (4), for acquiring the moving speed of the steel strip on the first side, the moving speed of the steel strip on the second side, the thickness of the steel strip on the first side, and determining the thickness of the steel strip on the second side; a calculation module (52) for determining the thickness of the steel strip on the second side based on the moving speed of the steel strip on the first side, the moving speed of the steel strip on the second side, the thickness of the steel strip on the first side, and the principle of constant volume of deformed metal; a judgment module (53), configured to judge whether the thickness of the steel strip on the first side exceeds a first target thickness, and further configured to judge whether the thickness of the steel strip on the second side exceeds a second target thickness; An AGC thickness control module (54) is used to adjust the roll gap width of the roll assembly (1) when the thickness of the steel strip on the first side exceeds a first target thickness or the thickness of the steel strip on the second side exceeds a second target thickness.

8. The single-machine reversible rolling mill according to claim 7, characterized in that: The AGC thickness control module (54) includes a feedforward AGC thickness control module (54) and a monitoring AGC thickness control module (54); the feedforward AGC thickness control module (54) is used to control the roll gap width of the roll assembly (1) according to the thickness of the strip on the second side when the strip is rolled from the first side to the second side of the roll assembly (1); and the monitoring AGC thickness control module (54) is used to control the roll gap width of the roll assembly (1) according to the thickness of the strip on the first side when the strip is rolled from the second side to the first side of the roll assembly (1).

9. The single-machine reversing rolling mill according to claim 7, characterized in that: The control system (5) further comprises: a rolling speed control module, wherein the rolling speed control module is used to adjust the rolling speed of the roll assembly (1) to 0.8-1.2 m / s when the roll gap width of the roll assembly (1) is pressed down to a target roll gap width.

10. A strip steel rolling system comprising a single reversing rolling mill, characterized in that: The single-machine reversible rolling mill is the single-machine reversible rolling mill according to any one of claims 1 to 9.

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