CN104550254A - Method for correcting second flow on head part of strip steel - Google Patents
Method for correcting second flow on head part of strip steel Download PDFInfo
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- CN104550254A CN104550254A CN201410647612.XA CN201410647612A CN104550254A CN 104550254 A CN104550254 A CN 104550254A CN 201410647612 A CN201410647612 A CN 201410647612A CN 104550254 A CN104550254 A CN 104550254A
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- Prior art keywords
- flow
- band steel
- described band
- steel
- strip steel
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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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- 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
- B21B2037/002—Mass flow control
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- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a method for correcting the second flow on the head part of strip steel, which is used for controlling the threading stability of the head part of hot continuous rolling thin gauge strip steel. The method comprises the steps of obtaining the second flow Fn of the strip steel on an upstream rack; obtaining the second flow Fn+1 of the strip steel on a downstream rack; comparing the second flow Fn with the second flow Fn+1 to obtain a correction factor K; correcting the second flow Fn of the strip steel on the upstream rack according to the correction factor K to obtain the corrected second flow Fm of the strip steel on the upstream rack, wherein the corrected second flow Fm is equal to K times of Fn. According to the method disclosed by the invention, the technical defects in the traditional technology that since the second flow change between every two adjacent racks is larger, the threading of the head part of the strip steel is extremely unstable, and expansion development and stable and continuous production of thin gauge branded steel are limited to a larger extent are overcome; the method is suitable for stable tension setting control on the head part of the hot continuous rolling strip steel, and the threading stability of the head part of the hot continuous rolling thin gauge strip steel during hot continuous rolling is increased.
Description
Technical field
The invention belongs to hot continuous rolling technical field, particularly a kind of method for correction tape steel head second flow.
Background technology
In prior art, strip steel head threading stability affects larger by head sideslip, head roll force setting accuracy, when threading sideslip, head roll force setting accuracy are not high, kink is often caused to lift too high, very easily occur that head threading is unstable, cause head roll rotten, roll the situation such as useless and occur; Especially for when rolling Thin Specs, because roll-force is larger, mill speed is very fast, under identical rolling force setup deviation, second flow between adjacent rack (upstream stand, downstream frame) can be caused to change greatly, thus causing head threading extremely unstable, the Expansion development and the steady and continuous that limit Thin Specs variety steel are largely produced.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method for correction tape steel head second flow, the method achieve and frame second flow is revised, when reaching tandem rolling, adjacent rack second flow is constant or keep necessary second flow difference to control object, overcome in conventional art because second flow between adjacent rack changes greatly, thus cause strip steel head threading extremely unstable, the Expansion development of upper restriction Thin Specs variety steel and the steady and continuous technological deficiency of producing largely.
For solving the problems of the technologies described above, the invention provides a kind of method for correction tape steel head second flow, be applied to and control hot continuous rolling thin specification strip steel head threading stability, described method comprises: obtain the second flow F of described band steel at upstream stand
n; Obtain the second flow F of described band steel in downstream frame
n+1; By described second flow F
nwith described second flow F
n+1contrast, obtain adjusted coefficient K; According to described adjusted coefficient K to the second flow F of described band steel at upstream stand
nrevise, show that described band steel is at the revised second flow F of upstream stand
m, wherein, described revised second flow F
mequal K F doubly
n; Wherein n be more than or equal to 1 integer.
Further, the described band steel of described acquisition is at the second flow F of upstream stand
ncomprise: measure the outlet initial velocity of described band steel at upstream stand; Measure the export goal thickness of described band steel at upstream stand; The second flow F of described band steel at upstream stand is drawn at the outlet initial velocity of upstream stand and export goal thickness according to measured described band steel
n.
Further, the described band steel of described acquisition is at the second flow F of downstream frame
n+1comprise: measure the outlet initial velocity of described band steel in downstream frame; Measure the export goal thickness of described band steel in downstream frame; The second flow F of described band steel in downstream frame is drawn at the outlet initial velocity of downstream frame and export goal thickness according to measured described band steel
n+1.
A kind of method for correction tape steel head second flow provided by the invention, first by obtaining the second flow F of band steel at upstream stand
n; Then the second flow F of band steel in downstream frame is obtained
n+1; Again by second flow F
nwith second flow F
n+1contrast, obtain adjusted coefficient K; Last foundation adjusted coefficient K is to the second flow F of band steel at upstream stand
nrevise, show that band steel is at the revised second flow F of upstream stand
mrealize revising the initial velocity of frame setting, when reaching tandem rolling, adjacent rack second flow is constant or keep necessary second flow difference to control object, overcome in conventional art because second flow between adjacent rack changes greatly, thus cause strip steel head threading extremely unstable, the Expansion development of upper restriction Thin Specs variety steel and the steady and continuous technological deficiency of producing largely, the present invention is applicable to hot-continuous-rolling strip steel head steady and builds and control, and improves head threading stability when hot rolling connects thin gauge strip tandem rolling.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic flow sheet of a kind of method for correction tape steel head second flow that Fig. 1 provides for the embodiment of the present invention; And
The another schematic flow sheet of a kind of method for correction tape steel head second flow that Fig. 2 provides for the embodiment of the present invention; And
A schematic flow sheet again of a kind of method for correction tape steel head second flow that Fig. 3 provides for the embodiment of the present invention; And
The working state schematic representation of adjacent two frames that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, all belongs to the scope of protection of the invention.
In the embodiment of the present invention, elaborating for ease of technical scheme, spy makes an explanation to alphabetical implication involved in following embodiment, specific as follows:
N, represents shelf number; H
n, representative band steel is at the export goal thickness of the n-th frame; H
n+1, representative band steel is at the export goal thickness of the (n+1)th frame; V
n, representative band steel is at the outlet initial velocity of the n-th frame; V
n+1, representative band steel is at the outlet initial velocity of the (n+1)th frame; F
n, representative is with steel at the second flow of the n-th frame, F
n+1, representative band steel is at the second flow of the (n+1)th frame; Wherein, the n-th frame relative to the (n+1)th frame as upstream stand, the (n+1)th frame relative to the n-th frame as downstream frame.
Refer to Fig. 1, a kind of method for correction tape steel head second flow that the embodiment of the present invention provides, the initial velocity of frame setting is revised, reach tandem rolling second of time constant flow or keep necessary second flow difference to control object, be applicable to hot-continuous-rolling strip steel head steady and build a control, to improve head threading stability when hot rolling connects thin gauge strip tandem rolling, the method comprises the steps:
Step 101: obtain the second flow F of described band steel at upstream stand
n;
Refer to Fig. 2, specifically, pair hot rolling of this step 101 connects the second flow F of thin gauge strip at upstream stand
nobtain, for showing that hot rolling connects the second flow of thin gauge strip at upstream stand, connect for heavy gauge steel strip relative to hot rolling, when rolling think gauge, because roll-force is less, and mill speed is lower, even if when little deviation appears in roll-force, it is also less to the interference of second flow between adjacent rack, generally can not have influence on hot rolling connect think gauge head threading stablize; But when rolling Thin Specs, because roll-force is larger, mill speed is very fast, under identical rolling force setup deviation, second flow between adjacent rack can be caused to change greatly, thus cause head threading extremely unstable, the Expansion development and the steady and continuous that limit Thin Specs variety steel are largely produced, therefore this step 101 is directed to hot rolling and connects thin gauge strip, obtains its second flow F at upstream stand
n, this step 101 specifically comprises following sub-step: step 101a, measures the outlet initial velocity of described band steel at upstream stand; Step 101b, measures the export goal thickness of described band steel at upstream stand; Step 101c, draws the second flow F of described band steel at upstream stand according to measured described band steel at the outlet initial velocity of upstream stand and export goal thickness
n.Wherein, band steel can be set at the outlet initial velocity of upstream stand as V
n, band steel is at the export goal thickness H of upstream stand
n, then F
n=V
n* H
n;
Step 102: obtain the second flow F of described band steel in downstream frame
n+1;
Refer to Fig. 3, specifically, this step 102 is similar with above-mentioned steps 101 principle, namely connects the second flow F of thin gauge strip in downstream frame for hot rolling
n+1obtain, for showing that hot rolling connects the second flow of thin gauge strip in downstream frame, for correction tape steel head second flow provides hot rolling to connect basic data (the second flow F of thin gauge strip in downstream frame
n+1), this step 102 specifically comprises following sub-step: step 102a, measures the outlet initial velocity of described band steel in downstream frame; Step 102b, measures the export goal thickness of described band steel in downstream frame; Step 102c, draws the second flow F of described band steel in downstream frame according to measured described band steel at the outlet initial velocity of downstream frame and export goal thickness
n+1.Wherein, band steel can be set at the outlet initial velocity of downstream frame as V
n+1, band steel is at the export goal thickness H of downstream frame
n+1, then F
n+1=V
n+1* H
n+1.
Further, the embodiment of the present invention obtains hot rolling successively by step 101, step 102 just and connects the second flow F of thin gauge strip at upstream stand
n, at the second flow F of downstream frame
n+1, owing to connecting thin gauge strip to thick hot rolling, roll-force is less, and mill speed is lower, even if when little deviation appears in roll-force, it is also less to the interference of second flow between adjacent rack, generally can not have influence on head threading and stablize; But for rolling thin gauge strip, because roll-force is larger, mill speed is very fast, under identical rolling force setup deviation, second flow between adjacent rack can be caused to change greatly, thus causing head threading extremely unstable, Expansion development and steady and continuous therefore for ensureing Thin Specs variety steel are produced, and are badly in need of connecting the second flow F of thin gauge strip in downstream frame according to hot rolling
n+1the second flow F of thin gauge strip at upstream stand is connected to hot rolling
nrevise, to overcome the impact caused rolling thin gauge strip because roll-force is comparatively large, mill speed is very fast.
Step 103: by described second flow F
nwith described second flow F
n+1contrast, obtain adjusted coefficient K; Wherein, F
n* K-F
n+1=0; This step 103 Following step 102, by connecting the second flow F of thin gauge strip in downstream frame by hot rolling
n+1the second flow F of thin gauge strip at upstream stand is connected with hot rolling
ncontrast, according to F
n* K-F
n+1=0 obtains adjusted coefficient K, and 104 couples of second flow F as follows
nrevise.
Step 104: according to described adjusted coefficient K to the second flow F of described band steel at upstream stand
nrevise, show that described band steel is at the revised second flow F of upstream stand
m, wherein, described revised second flow F
mequal K F doubly
n.
In more detail, refer to Fig. 4, generally speaking, a set angle of building of kink is 22 degree, when kink build subtended angle degree be greater than 22 degree time, all think the unstable phenomenon of a kind of threading; Be with steel crossing process schematic diagram between adjacent two milling trains when Fig. 4 is tandem rolling, band steel is at the outlet initial velocity V of upstream stand (the n-th frame)
n, export goal thickness H
n, band steel exports initial velocity V in downstream frame (the (n+1)th frame)
n+1, export goal thickness H
n+1, playing cover angle is α (standard is 22 degree), when rolling think gauge, roll-force is less, and mill speed is lower, even if when little deviation appears in roll-force, it is also less to the interference of second flow between adjacent rack, generally can not have influence on head threading and stablize; But when rolling Thin Specs, because roll-force is larger, mill speed is very fast, under identical rolling force setup deviation, second flow between adjacent rack can be caused to change greatly, thus causing head threading extremely unstable, the Expansion development and the steady and continuous that limit Thin Specs variety steel are largely produced; And a kind of method for correction tape steel head second flow provided by the invention, just for when rolling Thin Specs, the initial velocity of frame setting is revised, reach tandem rolling second of time constant flow or keep necessary second flow difference to control object, be applicable to hot-continuous-rolling strip steel head steady to build and control, to improve head threading stability when hot rolling connects thin gauge strip tandem rolling.Further, the present invention can carry out Speed Setting intervention to single or multiple frame second flow before the rolling, ensure that each kink plays cover angle, and stable when reaching high speed threading builds Zhang Xiaoguo, meets stability requirement during Thin Specs threading.Such as: all provide adjusted coefficient K=-1 to the correction of F1-F5 gantry speed, the second flow correction ratio of so each frame is as follows:
That is, the second flow of F1-F5 frame successively reduction be respectively 5%, 4%, 3%, 2%, 1%.
A kind of method for correction tape steel head second flow provided by the invention, first by obtaining the second flow F of band steel at upstream stand
n; Then the second flow F of band steel in downstream frame is obtained
n+1; Again by second flow F
nwith second flow F
n+1contrast, obtain adjusted coefficient K; Last foundation adjusted coefficient K is to the second flow F of band steel at upstream stand
nrevise, show that band steel is at the revised second flow F of upstream stand
mrealize revising the initial velocity of frame setting, when reaching tandem rolling, adjacent rack second flow is constant or keep necessary second flow difference to control object, overcome in conventional art because second flow between adjacent rack changes greatly, thus cause strip steel head threading extremely unstable, the Expansion development of upper restriction Thin Specs variety steel and the steady and continuous technological deficiency of producing largely, the present invention is applicable to hot-continuous-rolling strip steel head steady and builds and control, and improves head threading stability when hot rolling connects thin gauge strip tandem rolling.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (3)
1., for a method for correction tape steel head second flow, be applied to and control hot continuous rolling thin specification strip steel head threading stability, described method comprises:
Obtain the second flow F of described band steel at upstream stand
n;
Obtain the second flow F of described band steel in downstream frame
n+1;
By described second flow F
nwith described second flow F
n+1contrast, obtain adjusted coefficient K;
According to described adjusted coefficient K to the second flow F of described band steel at upstream stand
nrevise, show that described band steel is at the revised second flow F of upstream stand
m, wherein, described revised second flow F
mequal K F doubly
n, wherein n be more than or equal to 1 integer.
2. according to method according to claim 1, it is characterized in that, the described band steel of described acquisition is at the second flow F of upstream stand
ncomprise:
Measure the outlet initial velocity of described band steel at upstream stand;
Measure the export goal thickness of described band steel at upstream stand;
The second flow F of described band steel at upstream stand is drawn at the outlet initial velocity of upstream stand and export goal thickness according to measured described band steel
n.
3. according to method according to claim 1, it is characterized in that, the described band steel of described acquisition is at the second flow F of downstream frame
n+1comprise:
Measure the outlet initial velocity of described band steel in downstream frame;
Measure the export goal thickness of described band steel in downstream frame;
The second flow F of described band steel in downstream frame is drawn at the outlet initial velocity of downstream frame and export goal thickness according to measured described band steel
n+1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410647612.XA CN104550254A (en) | 2014-11-14 | 2014-11-14 | Method for correcting second flow on head part of strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410647612.XA CN104550254A (en) | 2014-11-14 | 2014-11-14 | Method for correcting second flow on head part of strip steel |
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| Publication Number | Publication Date |
|---|---|
| CN104550254A true CN104550254A (en) | 2015-04-29 |
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| CN201410647612.XA Pending CN104550254A (en) | 2014-11-14 | 2014-11-14 | Method for correcting second flow on head part of strip steel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009018957A1 (en) * | 2007-08-04 | 2009-02-12 | Sms Siemag Ag | Method for the production of a strip made of steel |
| CN101716606A (en) * | 2009-12-31 | 2010-06-02 | 中冶南方（武汉）自动化有限公司 | Rolling mill AGC control system |
| CN102407240A (en) * | 2010-09-26 | 2012-04-11 | 鞍钢股份有限公司 | Method for controlling strip steel finishing elongation by second flow |
| CN102764771A (en) * | 2012-07-31 | 2012-11-07 | 中冶赛迪电气技术有限公司 | Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill |
| CN102950155A (en) * | 2012-10-16 | 2013-03-06 | 河北钢铁股份有限公司唐山分公司 | AGC (Automatic Gain Control) method capable of calculating thickness based on second flow |
| CN103639207A (en) * | 2013-12-19 | 2014-03-19 | 西南铝业（集团）有限责任公司 | Second-flow thickness control method and system for single-frame four-roll high-speed cold-rolling mill |
-
2014
- 2014-11-14 CN CN201410647612.XA patent/CN104550254A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009018957A1 (en) * | 2007-08-04 | 2009-02-12 | Sms Siemag Ag | Method for the production of a strip made of steel |
| CN101716606A (en) * | 2009-12-31 | 2010-06-02 | 中冶南方（武汉）自动化有限公司 | Rolling mill AGC control system |
| CN102407240A (en) * | 2010-09-26 | 2012-04-11 | 鞍钢股份有限公司 | Method for controlling strip steel finishing elongation by second flow |
| CN102764771A (en) * | 2012-07-31 | 2012-11-07 | 中冶赛迪电气技术有限公司 | Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill |
| CN102950155A (en) * | 2012-10-16 | 2013-03-06 | 河北钢铁股份有限公司唐山分公司 | AGC (Automatic Gain Control) method capable of calculating thickness based on second flow |
| CN103639207A (en) * | 2013-12-19 | 2014-03-19 | 西南铝业（集团）有限责任公司 | Second-flow thickness control method and system for single-frame four-roll high-speed cold-rolling mill |
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Application publication date: 20150429 |
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