Heart-shaped roll defect treatment method for cold-rolled steel roll
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A cold-rolled steel and coil core technology is applied in the field of treatment of cold-rolled steel coil defects.
Inactive Publication Date: 2013-05-08
唐山市榕泽钢材加工有限公司
View PDF5 Cites 2 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
For the prevention and treatment of "heart-shaped coil" defects, the use of measures such as coiling tension optimization can certainly reduce the incidence of defects, but due to the constraints of "loose coil" and other defect prevention and control, the range of coiling tension optimization cannot be too large. This method cannot achieve the goal of eradicating the defect of "heart-shaped roll"
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
[0042] Such as figure 1 As shown, firstly, in step 1, relevant parameters of on-site coiling equipment are collected, the number of on-site sleeves is 1000, and the outer diameter r of the 1000 sleeves is collected bi , sleeve wall thickness t i , Sleeve material yield limit σ si , i=1,2,...,1000;
[0043] Subsequently, in step 2, relevant parameters of on-site product specifications are collected. There are 100 types of products with different specifications in the on-site product outline, and the specification range and process parameters of the 100 types of products with different specifications are collected, mainly including: strip steel thickness h i , strip width B i , strip elastic modulus E, strip Poisson's ratio v, i=1,2,...,100;
[0044] Subsequently, in step 3, considering the sleeve wall thickness and the yield limit of the sleeve material, the 1000 sleeves on site were divided into three grades of "high", "medium" and "low";
[0045] Then, in step 4, calcula...
Embodiment 2
[0060] First, in step 1, collect the relevant parameters of the on-site coiling equipment. The number of on-site sleeves is 2000, and the outer diameter r of the 2000 sleeves is collected bi , sleeve wall thickness t i , Sleeve material yield limit σ si , i=1,2,...,2000;
[0061] Subsequently, in step 2, relevant parameters of on-site product specifications are collected. There are 200 types of products with different specifications in the on-site product outline, and the specification range and process parameters of the 200 types of products with different specifications are collected, mainly including: strip steel thickness h i , strip width B i , strip elastic modulus E, strip Poisson's ratio v, i=1,2,...,200;
[0062] Subsequently, in step 3, considering the sleeve wall thickness and the yield limit of the sleeve material, the 2000 sleeves on site were divided into three grades of "high", "medium" and "low";
[0063] Then, in step 4, calculate the radial pressure betwe...
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 discloses a heart-shaped roll defect treatment method for a cold-rolled steel roll. The method comprises the following steps executed by a computer of: 1. collecting relevant parameters of site winding equipment and specification of a product; 2. classifying site sleeves; 3. calculating radial stress of steel rolls of all specifications at each moment during cooling; 4. calculating unstability critical stress sigmag0i and steel roll unstability factor value etami under a normal production condition; 5. sequencing and defining unstability factors and calculating a reference steel roll unstability factor etamomin; 6. performing feature parameter optimization on the sleeves of the product; and 7. calculating the unstability factor eta of a steel roll to be treated. By the method, on the premise of reducing the disposable equipment modifying cost and the equipment transferring cost to the maximum extent, the defects of a heart-shaped roll can be effectively overcome, and the good steel roll quality can be effectively guaranteed.
Description
technical field [0001] The invention belongs to the technical field of cold rolling in the metallurgical industry, and in particular relates to a technology for treating defects of cold rolled steel coils. Background technique [0002] In recent years, with the rapid development of the strip industry, users have put forward higher and higher requirements for the quality of strip products. During the unloading and cooling process of the cold-rolled strip after coiling, for steel coils with small thickness and many layers, due to the withdrawal of the coil, the strength or rigidity of the sleeve in the steel coil is insufficient. The sudden instability of the inner ring of the steel coil will cause partial or large-scale collapse, resulting in the so-called "heart-shaped coil" defect problem. The occurrence of the "heart-shaped coil" defect will seriously affect the quality of the strip, resulting in the degradation of the quality of the finished strip, or even being sentence...
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