CN115815340A - Method for improving same-plate difference of silicon steel - Google Patents
Method for improving same-plate difference of silicon steel Download PDFInfo
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- CN115815340A CN115815340A CN202211254611.XA CN202211254611A CN115815340A CN 115815340 A CN115815340 A CN 115815340A CN 202211254611 A CN202211254611 A CN 202211254611A CN 115815340 A CN115815340 A CN 115815340A
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Abstract
The invention relates to the technical field of silicon steel production, in particular to a method for improving the same-plate difference of silicon steel, which reduces the quality problem caused by the same-plate difference, greatly improves the product quality, increases the product competitiveness, reduces the production cost and improves the use economy; the method comprises the following steps: s1, analyzing the strip shape regulation and control performance of a rolling mill, and establishing a coupling model of rolling mill roll system elastic deformation based on a two-dimensional variable thickness finite element and rolled piece plastic deformation based on a three-dimensional difference; s2, calculating the thickness distribution at the outlet of the rolled piece through a roller system elastic deformation model, operating the rolled piece plastic deformation calculation model according to the obtained transverse thickness distribution, then comparing the calculated rolling force distribution in the bandwidth direction with the assumed rolling force distribution, outputting a final result if the deviation meets the requirement, and otherwise, correcting the rolling force distribution; and S3, inputting the hot rolling convexity of the hot rolled steel coil and the target transverse same-plate difference of the cold rolled steel plate into a calculation model.
Description
Technical Field
The invention relates to the technical field of silicon steel production, in particular to a method for improving the same-plate difference of silicon steel.
Background
The cold rolling convexity is obtained according to the equal proportion of the total deformation rate of the hot rolling convexity, but in the actual situation, the cold rolling convexity does not have the genetic hot rolling convexity of 100 percent, but only inherits about 70 percent, in addition, 30 percent of factors such as the cold rolling roll shape, the hot convexity, edge drop caused by harmful contact of edges and the like cause the actual cold rolling convexity to be larger than the theoretical convexity under the equal proportion of the hot rolling convexity, the current cold rolling convexity is larger, the level of the same plate difference of the silicon steel is influenced to a certain extent, meanwhile, the section shape of the steel plate is asymmetrical, the thickness of one side is a wedge, the thickness of the other side is a thin side, and the section shape of the steel plate is determined by the shape of an on-load roll gap during steel rolling, so the convexity and the wedge are improved by improving the same plate difference of the silicon steel. The poor quality of the same silicon steel plate affects the product competitiveness, causes the defective rate to be increased, affects the production benefit and increases the production cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for improving the same-plate difference of silicon steel, which can reduce the quality problems caused by the same-plate difference, greatly improve the product quality, increase the product competitiveness, reduce the production cost and improve the use economy.
The invention relates to a method for improving the same-plate difference of silicon steel, which comprises the following steps: s1, analyzing the strip shape regulation and control performance of a rolling mill, and establishing a coupling model of rolling mill roll system elastic deformation based on a two-dimensional variable thickness finite element and rolled piece plastic deformation based on a three-dimensional difference;
s2, calculating the thickness distribution at the outlet of the rolled piece through a roller system elastic deformation model, operating the rolled piece plastic deformation calculation model according to the obtained transverse thickness distribution, then comparing the calculated rolling force distribution in the bandwidth direction with the assumed rolling force distribution, outputting a final result if the deviation meets the requirement, and otherwise, correcting the rolling force distribution;
and S3, inputting the hot coil convexity of the hot rolled steel coil and the target transverse same-plate difference of the cold rolled steel sheet into a calculation model, and determining the roll shape insertion amount of the working roll and the intermediate roll play value under the minimum total trimming amount of the cold rolled steel coil.
According to the method for improving the same-plate difference of the silicon steel, the calculation of the plastic deformation of the rolled piece is controlled by the calculating unit, and the calculating method comprises a finite element method, a finite difference method and a strip element method.
According to the method for improving the same-plate difference of the silicon steel, the plate shape regulation and control performance comprises the transverse rigidity of a bearing roller gap, the roller gap regulation area, the roller bending force regulation and control effect and the contact pressure distribution between rollers.
The invention discloses a method for improving the same-plate difference of silicon steel.
According to the method for improving the same-plate difference of the silicon steel, the detector is used for detecting the hot coil convexity of the hot-rolled steel coil.
The invention relates to a method for improving the same-plate difference of silicon steel, which is used for inputting a target transverse same-plate difference of a cold-rolled steel plate.
The method for improving the same-plate difference of the silicon steel is characterized in that all calculation methods in the step 2 are integrated in the computer.
According to the method for improving the same-plate difference of the silicon steel, the display screen is used for outputting the roll shape insertion amount of the working roll and the play value of the intermediate roll.
The invention has the beneficial effects that: the quality problem caused by the same plate difference is reduced, the product quality is greatly improved, the product competitiveness is increased, the production cost is reduced, and the use economy is improved.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The method comprises the following steps: s1, analyzing the strip shape regulation and control performance of a rolling mill, and establishing a coupling model of rolling mill roll system elastic deformation based on a two-dimensional variable thickness finite element and rolled piece plastic deformation based on a three-dimensional difference;
s2, calculating the thickness distribution at the outlet of the rolled piece through a roller system elastic deformation model, operating the rolled piece plastic deformation calculation model according to the obtained transverse thickness distribution, comparing the calculated rolling force distribution in the bandwidth direction with the assumed rolling force distribution, outputting a final result if the deviation meets the requirement, and otherwise, correcting the rolling force distribution;
and S3, inputting the hot coil convexity of the hot rolled steel coil and the target transverse same-plate difference of the cold rolled steel sheet into a calculation model, and determining the roll shape insertion amount of the working roll and the intermediate roll play value under the minimum total trimming amount of the cold rolled steel coil.
The method is characterized in that the harmful contact area between the rolls is increased along with the increase of the roll shifting amount of the intermediate roll, the transverse rigidity of the roll gap is gradually reduced, the regulation and control efficiency of the intermediate roll bending roll on the secondary convexity is not changed greatly, the regulation and control efficiency on the quartic convexity is slightly reduced, the regulation and control efficiency of the working roll on the secondary convexity is gradually reduced, the regulation and control efficiency on the quartic convexity is not influenced greatly, and the contact pressure between the working roll and the intermediate roll, and between the intermediate roll and the supporting roll is more uniform. Along with the increase of the bending roll of the working roll, the transverse rigidity of the roll gap is reduced to a certain extent, the regulation and control effects of the secondary convexity and the fourth convexity caused by the roll shifting of the middle roll are increased to a certain extent, the contact pressure between the rolls is more uneven, and the influence of the bending roll of the middle roll on the regulation and control effects of the secondary convexity and the fourth convexity is small.
The plate shape adjusting means configured for the rolling mill is more, and comprises a middle roll bending roll, a middle roll shifting roll, a working roll positive and negative bending roll, the plate shape adjusting capability of the rolling mill is very strong, after all the plate shape adjusting means are used, the secondary convexity can be 200-300 gm, and the quartic convexity can be changed within 15-20um, so that the plate shape control requirement under most conditions can be met. In order to increase the transverse rigidity of the roll gap, to increase the resistance of the rolling mill to sheet-form disturbances and to reduce the crown of the roll gap, the roll shifting of the intermediate rolls must be minimized.
Example 2
The calculation of the plastic deformation of the rolled piece is controlled by a calculation unit, and the calculation method comprises a finite element method, a finite difference method and a strip element method.
Example 3
The shape regulation and control performance comprises transverse rigidity of a bearing roller gap, a roller gap regulation area, a roller bending force regulation and control effect and contact pressure distribution between rollers.
Example 4
The computing unit comprises a detector, an input device, a computer and a display screen.
Example 5
The detector is used for detecting the hot rolling convexity of the hot rolled steel coil.
Example 6
The input device is used for inputting the target transverse same-plate difference of the cold-rolled steel plate.
Example 7
And (3) integrating all calculation methods in the step (2) in the computer.
Example 8
The display screen is used for outputting the roll shape insertion amount of the working roll and the play value of the intermediate roll.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A method for improving the same-plate difference of silicon steel is characterized by comprising the following steps: s1, analyzing the strip shape regulation and control performance of a rolling mill, and establishing a coupling model of rolling mill roll system elastic deformation based on a two-dimensional variable thickness finite element and rolled piece plastic deformation based on a three-dimensional difference;
s2, calculating the thickness distribution at the outlet of the rolled piece through a roller system elastic deformation model, operating the rolled piece plastic deformation calculation model according to the obtained transverse thickness distribution, then comparing the calculated rolling force distribution in the bandwidth direction with the assumed rolling force distribution, outputting a final result if the deviation meets the requirement, and otherwise, correcting the rolling force distribution;
and S3, inputting the hot coil convexity of the hot rolled steel coil and the target transverse same-plate difference of the cold rolled steel sheet into a calculation model, and determining the roll shape insertion amount of the working roll and the intermediate roll play value under the minimum total trimming amount of the cold rolled steel coil.
2. The method for improving the same-plate difference of the silicon steel as set forth in claim 1, wherein the calculation of the plastic deformation of the rolled piece is controlled by a calculation unit, and the calculation method comprises a finite element method, a finite difference method and a strip element method.
3. The method for improving the same-plate difference of silicon steel as set forth in claim 1, wherein the plate shape control performance comprises transverse rigidity of bearing roll gap, roll gap control area, roll bending force control efficiency and contact pressure distribution between rolls.
4. The method for improving the same-plate difference of silicon steel as set forth in claim 2, wherein the calculation unit comprises a detector, an input device, a computer and a display screen.
5. The method for improving the same-grade difference of silicon steel as set forth in claim 4, wherein the detector is used for detecting the hot coil crown of the hot-rolled steel coil.
6. The method for improving the silicon steel sheet-to-sheet difference as set forth in claim 4, wherein the input unit is used for inputting the target transverse sheet-to-sheet difference of the cold-rolled steel sheet.
7. The method for improving the same-plate difference of silicon steel according to claim 4, wherein all calculation methods in the step 2 are integrated in the computer.
8. The method for improving the same-plate difference of silicon steel as set forth in claim 4, wherein the display screen is used for outputting the roll profile insertion amount of the working roll and the shifting value of the intermediate roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211254611.XA CN115815340A (en) | 2022-10-13 | 2022-10-13 | Method for improving same-plate difference of silicon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211254611.XA CN115815340A (en) | 2022-10-13 | 2022-10-13 | Method for improving same-plate difference of silicon steel |
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| Publication Number | Publication Date |
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| CN115815340A true CN115815340A (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211254611.XA Pending CN115815340A (en) | 2022-10-13 | 2022-10-13 | Method for improving same-plate difference of silicon steel |
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- 2022-10-13 CN CN202211254611.XA patent/CN115815340A/en active Pending
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