Detection method and device of multi-roll mill, multi-roll mill and storage medium

Abstract

The embodiment of the invention provides a detection method and device of a multi-roll mill, the multi-roll mill and a storage medium, and relates to the technical field of rolling. The method comprises the steps that the target edge thickness and the target center thickness of strip steel are obtained after the strip steel passes through a target rolling pass; based on the target edge thickness and the target edge thickness, the edge reduction rate and the center reduction rate of the strip steel are determined; and when the difference value obtained by subtracting the center reduction rate from the edge reduction rate is larger than a preset threshold value, it is determined that the rolling edge crack risk exists in the rack. According to the embodiment of the invention, the detection of the rack of the multi-roll mill is realized, and the rolling edge crack risk of the rack can be found in time, so that early warning is carried out in advance, the strip breakage problem caused by the rolling edge crack is improved, and the yield and the production efficiency are effectively improved.

Claims

1. A method for detecting a multi-roll mill, wherein the multi-roll mill comprises a plurality of adjacent stands, each of the stands corresponding to a rolling pass of a strip steel, characterized in that: The method comprises: The following detection operations are performed on each of the racks: Obtaining a target edge thickness and a target center thickness of the strip after a target rolling pass; wherein the target rolling pass is a rolling pass corresponding to the stand; determining an edge reduction rate and a center reduction rate of the strip based on the target edge thickness and the target edge thickness; When the difference between the edge reduction rate and the center reduction rate is greater than a preset threshold, it is determined that the stand has a risk of rolling edge cracking.

2. The method according to claim 1, characterized in that Determining the edge reduction rate and the center reduction rate of the strip steel includes: Determine the initial edge thickness and initial center thickness of the strip; determining an edge reduction rate of the strip based on the initial edge thickness and the target edge thickness; The center reduction ratio of the steel strip is determined based on the initial center thickness and the target center thickness.

3. The method according to claim 2, characterized in that When the target rolling pass is the first pass, the initial edge thickness and the initial center thickness are the strip thicknesses obtained before the strip is rolled; When the target rolling pass is not the first pass, the initial edge thickness and the initial center thickness are the thickness of the strip after the preceding rolling pass; wherein the difference between the target rolling pass and the preceding rolling pass is 1.

4. The method according to claim 1, wherein After determining that the stand has a risk of rolling edge cracking, the method includes at least one of the following: adjusting the roller gap of the frame; The reduction ratio and rolling force of the target rolling pass are increased.

5. The method according to claim 4, characterized in that The adjusting of the roller gap of the frame includes at least one of the following: reducing the bending force of the working rolls corresponding to the frame; The movement of the working rolls corresponding to the frame is reduced.

6. The method according to claim 1, characterized in that After determining the edge reduction rate and the center reduction rate of the strip steel, the method includes: When the difference between the edge reduction rate and the center reduction rate is less than or equal to a preset threshold, it is determined that there is no risk of rolling edge cracking in the stand.

7. The method according to claim 1, characterized in that After determining that the stand has a risk of rolling edge cracking, the method includes: Sending an early warning message for the rack.

8. A detection device for a multi-roll mill, wherein the multi-roll mill comprises a plurality of adjacent stands, each of the stands corresponding to a rolling pass of a strip steel, characterized in that: The device is used to: The following detection operations are performed on each of the racks: Obtaining a target edge thickness and a target center thickness of the strip after a target rolling pass; wherein the target rolling pass is a rolling pass corresponding to the stand; determining an edge reduction rate and a center reduction rate of the strip based on the target edge thickness and the target edge thickness; When the difference between the edge reduction rate and the center reduction rate is greater than a preset threshold, it is determined that the stand has a risk of rolling edge cracking.

9. A multi-roll rolling mill, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 7 when executing the computer program.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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