Control method for dynamically adjusting slab separation point in temperature waiting area of wide and thick plate

Abstract

The invention discloses a control method for dynamically adjusting plate blank separation points in a temperature waiting area of a wide and thick plate. A dynamic separation point is arranged at the outlet end of each group of roller ways in the temperature waiting area; a detection device used for obtaining the actual position of the plate blank on the roller way is installed in the temperature waiting area; during production, the number and length of the plate blanks on the temperature waiting area are obtained through an automatic control system; if the number of the plate blanks is equal to 1, the plate blanks are directly conveyed to a rolling area; if the number of the plate blanks is larger than 1, calculating and determining a dynamic separation point of the plate blank at the foremost end in the advancing direction of the roller way; in the conveying process, the position of the foremost plate blank is monitored, when the tail end of the foremost plate blank crosses the dynamic separation point, separation control is executed, and the foremost plate blank is conveyed to a rolling area; the remaining plate blanks are controlled to continuously swing in the temperature waiting area; and repeating the operation. By the adoption of the method, the optimal plate blank separation point position can be selected according to the actual length of the plate blank and the position of the plate blank occupying the roller way, energy consumption of back-and-forth transportation of the plate blank is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to an automated control technology for medium and thick plates in the metallurgical field, and in particular to a control method for dynamically selecting a slab separation point in a waiting area of ​​a wide and thick plate finishing mill. Background Art

[0002] In the automatic rolling production process of wide and heavy plates in domestic and foreign thick plate production lines, when the slab rolling in the current rolling mill area is completed, the slab in the waiting area needs to be transported to the rolling mill area for rolling. When the number of slabs in the waiting area exceeds 1, the front slab needs to be separated from the back slabs, and only the front slab ( Figure 1 The slabs in the middle are sent to the rolling mill area, and the remaining slabs need to be returned to the waiting area to continue waiting for temperature.

[0003] Currently, slab separation uses a fixed separation point control method, relying primarily on hot metal detectors to detect a fixed position. When a slab moves to a fixed position, a signal is triggered, triggering slab separation. Specifically, during slab separation, slabs exceeding one in the holding area are initially transported forward simultaneously. When the leading slab exceeds S2 (entering the FE4 zone), the speed is reduced, and all slabs in the holding area continue to move forward. When the tail of a slab exceeds S1 (entering the FE3 zone), separation occurs, and the slab continues to accelerate forward to the rolling area. The remaining slabs are then accelerated in the opposite direction and returned to the holding area. This separation control method has the following disadvantages: Because slab separation occurs at a fixed separation point, all slabs must be transported forward simultaneously before separation, regardless of which roller set the leading slab is on. After separation, the remaining slabs return, wasting energy. Furthermore, the deceleration before separation significantly impacts the rolling rhythm. Summary of the Invention

[0004] The purpose of the present invention is to provide a control method for dynamically adjusting the slab separation point in the waiting area for wide and thick plates. When there is more than one slab in the waiting area for temperature during the production process of wide and thick plates, the position of the nearest separation point can be selected according to the actual position and length of the specific slabs, thereby reducing the energy consumption of transporting the slabs back and forth and improving production efficiency.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solution: a control method for dynamically adjusting the slab separation point in the temperature-waiting area of ​​a wide and thick plate, characterized by comprising the following steps: S1: A dynamic separation point is set at the exit end of each roller conveyor in the temperature-holding area; a slab position detection device based on machine vision is installed in the temperature-holding area to obtain the actual position of the slab on the roller conveyor; S2: During the production process, the number and length of slabs in the waiting area are obtained through the automatic control system; If the number of slabs = 1, the slab is directly sent to the rolling area; If the number of slabs is greater than 1, the dynamic separation point of the leading slab in the roller conveyor's forward direction is calculated and determined; during the conveying process, the position of the leading slab is monitored by the hot metal detector and the slab position detection device. When the tail end of the leading slab crosses the nearest dynamic separation point, separation control is executed to convey the leading slab to the rolling area; the remaining slabs are controlled to continue swinging in the waiting area; S3: Repeat step S2.

[0006] Furthermore, the slab position detection device is an industrial camera installed above one side of the roller in the temperature-waiting area.

[0007] Furthermore, the process of calculating and determining the dynamic separation point of the frontmost slab in the roller conveyor's forward direction is as follows: 1) Collect the dimensions of each set of rollers from the start and end to the starting point of the temperature waiting area, and establish a roller size range data table; 2) Calculate the distance Ly from the front end of the second slab to the starting point of the temperature waiting area, and determine which group of roller dimensions Ly is within. The roller outlet corresponding to the Ly dimension is the dynamic separation point of the front slab.

[0008] The beneficial effect of the present invention is: by adopting the method of the present invention, by setting a dynamic separation point at the outlet end of each group of rollers, when there is more than one slab in the temperature-waiting area, the optimal slab separation point position can be selected according to the actual length of the slab and the position occupied by the rollers, thereby reducing the energy consumption of transporting the slabs back and forth and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0010] Figure 1 This is a schematic diagram of separating two slabs at a fixed separation point in the prior art.

[0011] Figure 2 This is a schematic diagram of the separation of two slabs at a dynamic separation point in the present invention.

[0012] Figure 3 This is a schematic diagram of the separation of three slabs at a dynamic separation point in the present invention. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0014] like Figure 1 As shown, a control method for dynamically adjusting the slab separation point in the temperature-waiting area of ​​a wide and thick plate includes the following steps.

[0015] S1: Set a dynamic separation point at the exit of each roller conveyor in the waiting area; Figure 2 As shown, the dynamic separation points corresponding to the first group of rollers RX5, the second group of rollers FE7, the third group of rollers FE6, the fourth group of rollers FE5 and the fifth group of rollers FE4 are A1, A2, A3, A4 and A5 respectively.

[0016] In addition, a machine vision-based slab position detection device is installed in the warming area to detect the actual position of the slab on the roller conveyor. Specifically, the slab position detection device is an industrial camera installed above the roller conveyor in the warming area. It works in conjunction with the existing automated tracking system to track the actual position of the slab and make timely corrections to ensure tracking accuracy.

[0017] S2: During the production process, the number and length of the slabs in the temperature waiting area are obtained through the automatic control system.

[0018] If the number of slabs = 1, no separation operation is required and the slab is directly sent to the rolling area.

[0019] If the number of slabs is greater than 1, the dynamic separation point of the frontmost slab in the roller conveyor's forward direction is calculated and determined; specifically: Collect the distance between the beginning and end of each set of rollers and the starting point of the waiting area, such as Figure 2 As shown, a roller size range data table is established, as shown in Table 1.

[0020]

[0021] Table 1 2) Calculate the distance Ly from the front end of the front slab 2 to the starting point of the temperature waiting area, and determine which group of roller dimensions Ly is within. The roller outlet corresponding to the Ly dimension is the dynamic separation point of the front slab 1. Figure 2 As shown, Ly is within the size range of roller group RX5, that is, the dynamic separation point corresponding to slab 1 is A1. Figure 3 As shown in the figure, Ly is within the size range of roller group FE7, that is, the dynamic separation point corresponding to slab 1 is A2. The dynamic separation point of the slab can be determined by analogy.

[0022] During the conveying process, the hot metal detector and the slab position detection device cooperate to monitor the position of the front slab 1. When the tail end of the front slab 1 crosses the nearest dynamic separation point, separation control is executed to convey the front slab 1 to the rolling area; the remaining slabs are controlled to continue swinging in the waiting area; S3: Repeat step S2 until the production plan is completed.

[0023] Compared to existing separation control methods, the method of the present invention enables separation at the nearest separation point, effectively reducing the time it takes to transport the slab back and forth. Furthermore, because separation is always performed at the nearest separation point, there is no need to set a deceleration time, allowing the leading slab to reach the rolling area more quickly, improving production efficiency.

[0024] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A control method for dynamically adjusting the slab separation point in the temperature waiting area of ​​a wide and thick plate, characterized in that: The steps include: S1: A dynamic separation point is set at the exit end of each roller conveyor in the temperature-holding area; a slab position detection device based on machine vision is installed in the temperature-holding area to obtain the actual position of the slab on the roller conveyor; S2: During the production process, the number and length of slabs in the heating area are obtained through the automatic control system; If the number of slabs = 1, the slab is directly sent to the rolling area; If the number of slabs is greater than 1, the dynamic separation point of the leading slab in the roller conveyor's forward direction is calculated and determined; during the conveying process, the position of the leading slab is monitored by the hot metal detector and the slab position detection device. When the tail end of the leading slab crosses the dynamic separation point, separation control is executed to convey the leading slab to the rolling area; the remaining slabs are controlled to continue swinging in the waiting area; S3: Repeat step S2.

2. The control method for dynamically adjusting the slab separation point in the wide and thick plate waiting area according to claim 1 is characterized in that: The slab position detection device is an industrial camera installed above one side of the roller in the temperature waiting area.

3. The control method for dynamically adjusting the slab separation point in the wide and thick plate waiting area according to claim 1 or 2, characterized in that: The process of calculating and determining the dynamic separation point of the frontmost slab in the roller conveyor's forward direction is as follows: 1) Collect the dimensions of each set of rollers from the start and end to the starting point of the temperature waiting area, and establish a roller size range data table; 2) Calculate the distance Ly from the front end of the second slab to the starting point of the temperature waiting area, and determine which group of roller dimensions Ly is within. The roller outlet corresponding to the Ly dimension is the dynamic separation point of the front slab.

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