A dynamic adjustable descaling pressure control method for strip surface grading
What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
A technology of pressure control and strip steel, applied in rolling mill control device, workpiece surface treatment equipment, manufacturing tools, etc., can solve the problem of surface quality improvement of hot-rolled strip, large loss of rolling line shutdown, and inability to adjust the pressure of 2# descaling box and other problems to achieve accurate results, improve strip surface quality, and enhance product competitiveness.
Active Publication Date: 2020-06-23
BAOSHAN IRON & STEEL CO LTD
View PDF7 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] Traditional surface inspection systems are only used for surface rating and are not linked to any other rolling process control systems
In the actual production process of 2050 hot rolling, it was found that there were unremoved sporadic iron sheet defects on the surface of the strip, combined with image 3 , the pressure of the original 2# descaling box cannot be adjusted, which limits the improvement of the surface quality of hot-rolled strip steel
At the same time, the loss of the rolling line shutdown caused by the defect search process is also relatively large
At present, the hot-rolled strip online detection system classifies the defects, and the operator judges according to the classification and defect degree, but the combination of the defect degree and the actual control system has not been realized
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0046] The dynamic and adjustable descaling pressure control method for strip surface classification includes the following steps:
[0047] S1. For steel grade A, the carbon content is 0.15%, the silicon content is 0.12%, and the FT design is 870℃;
[0048] S2, steel grade A, before rolling the i-th strip, the process machine will read the descale pressure of the 3003 layer and set the initial value P according to the composition of steel grade A and the FT quality design layer. i =18MPa;
[0049] S3. In the production process of strip steel, the surface of the strip is detected on-line to count the strip steel defects. After rolling, the strip steel has a total of 227 defect pictures. According to the surface grading system, the corresponding surface quality defect level is obtained as 5, and the surface grading pressure correction is read The coefficient is 1.1;
[0050] S4. For the steel grade A of the 3003 layer, the pressure setting of the descaling box is based on the self-learn...
Embodiment 2
[0054] The dynamic and adjustable descaling pressure control method for strip surface classification includes the following steps:
[0055] S1. For steel grade B, the carbon content is 0.68%, the silicon content is 0.17%, and the FT design is 850°C;
[0056] S2, steel grade B, before rolling the i-th strip, the process machine designs the layer according to the composition of steel grade B and the FT quality, and reads the descale pressure of the 3017 layer to set the initial value P i =28MPa;
[0057] S3. For steel grade B, after rolling the i-th strip, the surface of the strip is detected on-line to count the strip defects. After rolling, the strip has a total of 563 defect pictures. According to the surface grading system, the corresponding surface quality defect level is 9 , Read the surface classification pressure correction coefficient as 1.2;
[0058] S4. For the steel grade B of the 3017 layer, the pressure setting of the descaling box is based on the self-learning function, a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a classified and dynamic adjustable descaling pressure control method for the surface of strip steel. The layered descaling water pressure is set as Pi according to the currentstrip steel compositions and FT quality design, strip steel defects are counted through online detection surface, the corresponding surface quality defect grades are obtained through a surface classifying system, the respective pressure amending coefficient Ka of the surface is read, the descaling pressure set initial value of a next block of strip steel is updated, the initial value Pi +1 is Ka*Pi, and the quality defects of the strip steel surface are improved through classified and dynamic adjustment of the descaling pressure of the surface of the strip steel. The surface defects of the hot-rolled strip steel are detected in a full-continuous online mode through a surface detection system, a detection result is accurate, complete and stable, and the strip steel surface quality and product competiveness are effectively improved.
Description
Technical field [0001] The invention relates to the technical field of descaling control for hot tandem rolling mill units, and in particular to a method for controlling a dynamically adjustable descaling pressure for strip steel surface classification. Background technique [0002] Hot rolling production line process combination figure 1 There are roughly heating furnace 1, rough rolling 2, finishing rolling 3, layer cooling 4, and coiling 5 processes. The hot rolling process is as follows: 210-250mm thick continuous casting slab is heated to about 1200 degrees in the hot rolling heating furnace, 1# high pressure water descaling box 6 is descaled, and then it enters the first rack 7 of rough rolling for one pass After that, it is rolled five times in the second rack 8 of the rough rolling, and the third rack 9 and the fourth rack 10 are roughed each time, and finally rolled into an intermediate billet with a thickness in the range of 36-65mm. According to the target value of di...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More