CN108543813B - Process control method for improving coil shape of hot-rolled coil box - Google Patents
Process control method for improving coil shape of hot-rolled coil box Download PDFInfo
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- CN108543813B CN108543813B CN201810260319.6A CN201810260319A CN108543813B CN 108543813 B CN108543813 B CN 108543813B CN 201810260319 A CN201810260319 A CN 201810260319A CN 108543813 B CN108543813 B CN 108543813B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
The invention discloses a process control method for improving the coil shape of a hot-rolled coil box, which comprises the following steps: when the steel coil intermediate blank enters a bending roller, obtaining the roundness condition of a half circle of the head of the steel coil intermediate blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller; when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank; when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control; and when the intermediate steel coil blank enters the pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape. The technical problems that the inner ring of the rolled strip steel is not round, loose, cannot be coiled, the head of the steel coil deviates after uncoiling and the finishing mill is not aligned are solved, and the technical effects that the coil shape is good and the uncoiling is stable during coiling, the load of the finishing mill is reduced and the surface quality of a product is improved are achieved.
Description
Technical Field
The invention relates to the technical field of rolling processes, in particular to a process control method for improving the coil shape of a hot-rolling coil box.
Background
When the finishing mill rolls wide and thin specifications, the rolling performance is outstanding, and the problems are that the load of the rolling mill is large, the vibration of the rolling mill is serious, the rolling stability is poor, and particularly, the tail part temperature of strip steel is low, so tail drifting, rolling instability and the like are easily caused. The hot coil box rolling process can well solve the problems, in the coiling process of the hot coil box, strip steel is pre-formed by heads of an inlet roller, a bending roller, a 1# cradle roller, a forming roller and the like in sequence, and after coiling is finished, the strip steel is uncoiled by a 2# stabilizer, a pinch roller and the like, and an intermediate blank is gradually sent to a finishing mill set.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventor of the present application finds that the above prior art has at least the following technical problems:
the prior art has the technical problems that the inner ring of the rolled strip steel is not round, loose and cannot be coiled, the head part deviates after uncoiling, and the finish rolling mill has non-centering rolling.
Disclosure of Invention
The embodiment of the invention provides a process control method for improving the coil shape of a hot rolling hot coil box, which solves the technical problems of non-roundness of an inner ring of a rolled strip steel, coil loosening, coil loosing and non-coiling, deviation of the head after uncoiling and non-centering rolling of a finishing mill in the prior art, and achieves the technical effects of good coil shape and stable uncoiling during coiling, reduction of the load of the finishing mill and improvement of the surface quality of a product.
In order to solve the above problem, an embodiment of the present invention provides a method for improving a process control of a hot-rolled coil form, where the method includes: when the steel coil intermediate blank enters a bending roller, obtaining the roundness condition of a half circle of the head of the steel coil intermediate blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller; when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank; when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control; and when the intermediate steel coil blank enters the pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape.
Preferably, the method further comprises: the speed of the upper bending roll is adjusted on line, and the advance rate modification range is-1% -5%.
Preferably, the method further comprises: and lifting the lower limit position of the forming roller and fixing the forming roller.
Preferably, the method further comprises: the speed of the upper bending roll is adjusted on line, and the advance rate modification range is 1-5%.
Preferably, the method further comprises: and lowering the lower limit position of the forming roller and fixing the forming roller.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
1. the embodiment of the invention provides a process control method for improving the coil shape of a hot-rolled coil box, which comprises the following steps: when the steel coil intermediate blank enters a bending roller, obtaining the roundness condition of a half circle of the head of the steel coil intermediate blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller; when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank; when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control; and when the intermediate steel coil blank enters the pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape. By the method, the technical problems that the inner ring of the rolled strip steel is not round, loose, not coiled and off-centered after uncoiling are solved, and the finish rolling mill is not centered, so that the technical effects of good coil shape and stable uncoiling during coiling, reducing the load of the finish rolling mill and improving the surface quality of products are achieved.
2. The speed of the upper bending roll is adjusted on line, the advance rate modification range is-1% -5%, and the technical effect of improving the large curvature of the inner ring when the hot coil box coils the strip steel is further achieved.
3. According to the invention, the speed of the upper bending roll is adjusted on line, the advance rate modification range is 1% -5%, and the technical effect of improving the small curvature of the inner ring when the hot coil box coils the strip steel is further achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method for improving process control of hot-rolled coil form in accordance with an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a process control method for improving the coil shape of a hot-rolled hot coil box, which solves the technical problems of out-of-round, loose coil, non-up coiling, off-tracking of coil heads after uncoiling and non-centering of a finishing mill of rolled strip steel.
The technical scheme in the embodiment of the invention comprises the following steps: when the steel coil intermediate blank enters a bending roller, obtaining the roundness condition of a half circle of the head of the steel coil intermediate blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller; when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank; when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control; and when the intermediate steel coil blank enters the pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape. The technical problems that the inner ring of the rolled strip steel is not round, loose, cannot be coiled, the head of the steel coil deviates after uncoiling and the finishing mill is not aligned are solved, and the technical effects that the coil shape is good and the uncoiling is stable during coiling, the load of the finishing mill is reduced and the surface quality of a product is improved are achieved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment of the invention provides a process control method for improving the coil shape of a hot-rolled coil box, which comprises the following steps:
step 110, when the intermediate steel coil blank enters a bending roller, obtaining the roundness of a half circle of the head of the intermediate steel coil blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller;
specifically, the middle blank head half-circle is formed by bending a roll gap between an upper bending roll and a lower bending roll, the factor influencing the roundness of the head half-circle is mainly the linear speed of the roll gap and the roll surface, and the linear speed compensation function of the upper bending roll is developed according to the roundness condition of the head half-circle. After the steel coil intermediate blank enters the bending rollers, the roller gaps of the upper bending roller and the lower bending roller are properly adjusted according to the roundness condition of the half circle of the head of the steel coil intermediate blank, so that the half circle curvature of the head of the steel coil intermediate blank is consistent with the curvature of the steel coil.
Step 120, when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank;
specifically, the profile roller can continuously and transversely bend metal plate strips such as coiled materials, strips and the like to manufacture a section bar with a specific section, when the steel coil intermediate blank enters the forming roller, the position of the forming roller is adjusted up and down according to the roundness condition of the half circle of the head part in the middle of the steel coil, so that different positions of head part impact are changed, and the roundness of the head circle of the intermediate blank is further improved.
Step 130: when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control;
specifically, in the uncoiling process after coiling is completed, the steel coil intermediate blank enters the No. 2 stabilizer, and the No. 2 stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank; the short stroke when 2# stabilizer is opened a book is changed into whole dynamic patting formula by head, well, tail three-break formula, has improved the board book and has opened a book centering effect, and wherein step distance, step length can carry out different assignments according to actual need.
Step 140: and when the intermediate steel coil blank enters the pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape.
Specifically, when the intermediate steel coil blank enters the pinch roll, the roll shape of the pinch roll is designed, and the intermediate steel coil blank is controlled by adopting a trapezoidal negative roll shape, so that the uncoiling self-centering function is enhanced, and the problem of deviation of an uncoiling head is avoided; the ladder-shaped negative roll shape can solve the defect that the bad section of the hot rolled steel strip is left to the cold rolled steel strip to cause the local protrusion of the steel strip, thereby effectively controlling the flatness and centering degree of the steel strip and preventing the steel strip from deviating.
Further, the method further comprises: and (3) carrying out online adjustment on the speed of the upper bending roller, wherein the advance rate modification range is-1% -5%, lifting the lower limit position of the forming roller, and fixing the forming roller.
Specifically, the speed of an upper bending roller is adjusted on line, and the advance rate modification range is-1% to-5%; and lifting the lower limit position of the forming roller, and fixing the forming roller, so that the problem of overlarge half-circle bending rate of the steel coil head can be effectively solved.
Further, the method further comprises: and (3) adjusting the speed of the upper bending roller on line, wherein the advance rate modification range is 1% -5%, reducing the lower limit position of the forming roller, and fixing the forming roller.
Specifically, the speed of an upper bending roller is adjusted on line, and the advance rate modification range is 1% -5%; and lowering the lower limit position of the forming roller and fixing the forming roller. The problem that the half-circle bending rate of the steel coil head is too small can be effectively solved.
The process control method for improving the coil shape of the hot-rolled coil box effectively solves the problems of poor coil shape and unstable uncoiling of the coreless coiling hot-coil box during coiling, and fully exerts the functional advantages of reducing the temperature drop of an intermediate blank, reducing the load of a finishing mill and improving the surface quality of a product.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages:
1. the embodiment of the invention provides a process control method for improving the coil shape of a hot-rolled coil box, which comprises the following steps: when the steel coil intermediate blank enters a bending roller, obtaining the roundness condition of a half circle of the head of the steel coil intermediate blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller; when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank; when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control; and when the intermediate steel coil blank enters the pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape. By the method, the technical problems that the inner ring of the rolled strip steel is not round, loose, not coiled and off-centered after uncoiling are solved, and the finish rolling mill is not centered, so that the technical effects of good coil shape and stable uncoiling during coiling, reducing the load of the finish rolling mill and improving the surface quality of products are achieved.
2. The speed of the upper bending roll is adjusted on line, the advance rate modification range is-1% -5%, and the technical effect of improving the large curvature of the inner ring when the hot coil box coils the strip steel is further achieved.
3. According to the invention, the speed of the upper bending roll is adjusted on line, the advance rate modification range is 1% -5%, and the technical effect of improving the small curvature of the inner ring when the hot coil box coils the strip steel is further achieved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (1)
1. A process control method for improving a hot rolled coil form, the method comprising:
when the steel coil intermediate blank enters a bending roller, obtaining the roundness condition of a half circle of the head of the steel coil intermediate blank, and adjusting the roller gap and the roller surface linear velocity of an upper bending roller and a lower bending roller;
when the steel coil intermediate blank enters a forming roller, adjusting the position of the forming roller up and down according to the roundness of the half circle of the head of the steel coil intermediate blank;
when the steel coil intermediate blank enters a No. 2 stabilizer, the stabilizer performs whole-process dynamic flapping on the steel coil intermediate blank to enhance centering control;
when the intermediate steel coil blank enters a pinch roll, controlling the intermediate steel coil blank by adopting a ladder-shaped negative roll shape;
for the situation that the semi-circle bending rate of the head of the steel coil intermediate blank is too large, the speed of the upper bending roller is adjusted on line, the advance rate modification range is-1% -5%, the lower limit position of the forming roller is lifted, and the forming roller is fixed;
and for the situation that the semi-circle bending rate of the head of the steel coil intermediate blank is too small, the speed of the upper bending roller is adjusted on line, the advance rate modification range is 1% -5%, the lower limit position of the forming roller is reduced, and the forming roller is fixed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810260319.6A CN108543813B (en) | 2018-03-27 | 2018-03-27 | Process control method for improving coil shape of hot-rolled coil box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810260319.6A CN108543813B (en) | 2018-03-27 | 2018-03-27 | Process control method for improving coil shape of hot-rolled coil box |
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| CN108543813A CN108543813A (en) | 2018-09-18 |
| CN108543813B true CN108543813B (en) | 2021-03-09 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2377023Y (en) * | 1999-02-14 | 2000-05-10 | 中国第二重型机械集团公司 | Heat coiling drum |
| DE10014813B4 (en) * | 2000-03-27 | 2005-10-06 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Method and device for positionally winding a rolled hot strip in a coiler |
| CN2493328Y (en) * | 2001-05-16 | 2002-05-29 | 中国第二重型机械集团公司 | Coreless feeding type themal steel winding box |
| CN103056168B (en) * | 2013-01-10 | 2015-09-30 | 北京首钢股份有限公司 | A kind of method controlling deviation of intermediate billet of coil box |
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2018
- 2018-03-27 CN CN201810260319.6A patent/CN108543813B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| "热卷箱在迁钢2250热轧生产线的应用";刘文斌等;《重型机械》;20090531(第5期);正文第2-3页 * |
| "热卷箱弯曲辊控制浅析";白永昕;《冶金设备》;20060430(第2期);正文2-3页 * |
| "热卷箱弯曲辊辊缝及抬起速度探讨";王伟光等;《轧钢》;20061031;第23卷(第5期);正文第3页 * |
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