A Method for Preventing Flat Twisting of Cold-rolled Steel Strip on-line
A technology for flattening twill and cold-rolled strip steel, applied in the field of cold-rolling in the metallurgical industry, can solve the problem that the elastic deformation of strip steel cannot be ignored, and achieve the effect of improving the shape and surface quality, and improving the level of efficiency.
Inactive Publication Date: 2016-06-01
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Both the rolling mill and the strip steel have elastic deformation during the rolling process, while the strip steel has elastic deformation and plastic deformation at the same time, and the elastic deformation of the strip steel cannot be ignored. There is currently no mature mathematical model for the rolling process of the temper mill. Make simulations and forecasts
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0038] Embodiment 1, rolling aluminum killed steel DC03, the specification is 1341×0.7mm, and the rolled length is 3258.36m. By fitting the shape defects of the current shape, the coefficients of formula (1) are A=0.089, B=-0.278, D=0.211. By recording the current rolling force difference Div=-50.4KN, then in the formula (2) ε=|-50 / 1341 / 0.089|=0.41≤1.7, it can be judged that flat twill will not occur; 1.7 is related to steel type and specification related to a constant.
Embodiment 2
[0039] Example 2, aluminum killed steel DC01 is rolled, the specification is 2016×1.45mm, and the rolled length is 416m. By fitting the shape defect of the current shape, the coefficients of formula (1) are A=-0.128, B=-0.092, D=0.153. By recording the current rolling force difference Div=-78.8.4KN, then in formula (2) ε=|-78.8 / 2016 / 0.128|=0.305≤1.7, it can be judged that flat twill will not occur. 1.7 is a constant related to steel types and specifications.
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 relates to a method for preventing flat cross grain of cold-rolled strip steel in an online way, and belongs to the technical field of cold rolling of metallurgical industry. The method adopts the technical scheme that when the cross section area is not matched with a roll gap, the flat cross grain is generated; the wedge shape of the cross section of the steel strip must be matched with the wedge shape of the roll gap, so the factor of matching degree of the shape of the cross section of the steel strip and the shape of the roll gap exists, and the generation of the flat cross grain is controlled by the calculation value sigma of a formula. The method has the beneficial effects that the value sigma has corresponding relationship with the strength of steel grade, the corresponding table of the value sigma and the strength of steel grade is drawn, the normal production of steel strip can be guaranteed by only controlling the value sigma not to exceed the lookup value no matter how a rolling machine is adjusted in the control process, and the flat cross grain is avoided, so the generation of flat cross grain can be prevented by looking up the table in the actual production process; by controlling the generation rate of the flat cross grain to be less than 0.001%, the plate shape and surface quality of the steel strip are improved, and the benefit level of steel and iron enterprises is improved.
Description
technical field [0001] The invention relates to an online method for preventing the occurrence of flat twill lines in cold-rolled strip steel, and belongs to the technical field of cold-rolling in the metallurgical industry. Background technique [0002] Flat twill is a kind of defect that is easy to occur on the annealed steel strip. Due to the uneven surface of the flat twill, the strip steel is degraded or even scrapped. The flat twill defect has a serious impact on the benefits of iron and steel enterprises. It is A cold rolling defect that should be avoided. In the background technology, there is currently no common method for solving the flat twill, and there is no unified understanding of the flat twill, which increases the difficulty of solving this cold rolling defect. Leveling is an important process in the production of annealed steel strip, and its function is to eliminate the yield platform of the annealed steel strip and further improve the strip shape after a...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/28
Inventor 郭景瑞何方刘守显王丽峰刘素英孙电强杜艳玲贾贵兴张龙柱
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY