CN114762867A - Online treatment method for surface rolling defects - Google Patents
Online treatment method for surface rolling defects Download PDFInfo
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- CN114762867A CN114762867A CN202110051363.8A CN202110051363A CN114762867A CN 114762867 A CN114762867 A CN 114762867A CN 202110051363 A CN202110051363 A CN 202110051363A CN 114762867 A CN114762867 A CN 114762867A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 82
- 230000007547 defect Effects 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 239000010959 steel Substances 0.000 claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims abstract description 8
- 238000003672 processing method Methods 0.000 abstract description 6
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses an online processing method of surface rolling defects, which is characterized in that an online rolling change judgment model is established in a secondary process computer system, after the primary process computer system controls the current online steel coil to be rolled completely, all rolling production process data are sent to the secondary process computer system, the secondary process computer system judges whether the online steel coil is non-final rolled coil, if not, the coil is unloaded, if so, the online steel coil is recalculated through the online rolling change judgment model to judge whether the online steel coil can be rolled again, the rolling mark defects are eliminated, if not, the coil unloading process is carried out, rolling process parameters are sent to the primary process computer system, and the primary process computer system controls the online steel coil to be rolled again. The invention solves the degradation problem of the defects of roll marks and the like on the surface of the rolled strip steel.
Description
Technical Field
The invention relates to a method for processing surface defects after rolling by a single-stand rolling mill, in particular to an online processing method for surface rolling defects.
Background
At present, products such as oriented silicon steel, high-grade non-oriented silicon steel, stainless steel, special steel, high-strength steel, ultrathin strips and the like rolled in the world mainly adopt a single stand for rolling, namely one stand and a plurality of rollers are used for carrying out reciprocating rolling, and the requirements are mainly related to the performance requirements and the dimensional accuracy requirements of the products.
When a single-stand rolling mill is adopted, the following two methods are adopted for checking the surface defects of each rolled steel coil:
1) in the process of rolling the strip steel, the surface quality is detected on line by an on-line surface defect detector, a detection result system automatically records and automatically judges according to the defect grade;
2) after the steel coil is rolled, the online surface quality is manually checked by naked eyes and judged manually.
However, when the two surface defect inspection methods find that the defects such as the roll marks and the like which are not releasable in a point shape are detected, the information is closed, and the information is submitted to a professional quality inspection processing department for processing, wherein the common processing mode is to degrade or release the product.
Referring to fig. 1, the present manual quality inspection process flow includes: rolling a steel coil, finishing the rolling of the steel coil, unloading the steel coil, manually checking the surface quality of the steel coil at a saddle, recording and submitting the quality information of the steel coil, processing by a quality checking department, and degrading or releasing.
Referring to fig. 2, the recording process of the present surface defect detector includes: steel coil rolling- (steel coil pass rolling completion-steel coil unloading)/online surface defect detector automatic detection record-steel coil quality information record automatic submission-quality inspection department processing-degradation or release.
The roll mark defect is the most important defect in the production process of the single-stand rolling mill, accounts for more than 60% of the total amount of the defects of the unit, is not only treated and controlled from the source, but also is a means for reducing the cost by eliminating the defects after the occurrence on line, and at present, no better method exists for eliminating the roll mark defect of the whole roll on line.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an online processing method for surface rolling defects, which solves the degradation problem of the defects such as roll marks on the surface of the rolled strip steel.
In order to achieve the purpose, the invention adopts the following technical scheme:
an on-line treatment method for surface rolling defects, comprising the steps of:
1) establishing an online rolling change judgment model in a secondary process computer system;
2) the first-stage process computer system controls the current on-line steel coil rolling, and after the rolling is finished, all rolling production process data are sent to the second-stage process computer system;
3) Judging whether the online steel coil is a non-final-rolled coil or not by the secondary process computer system, if not, entering a coil unloading process, and if so, entering a step 4);
4) and recalculating and judging whether the online steel coil can be rolled again or not through the online rolling change judging model, eliminating the roll mark defect, if not, entering the coil unloading process, and if so, sending the rolling process parameters to the primary process computer system, and controlling the online steel coil to be rolled again by the primary process computer system.
Preferably, the online processing method further comprises:
5) repeating the steps 2) to 4) to judge the surface quality of the online steel coil after the secondary rolling again;
6) after finishing the rolling of the online steel coil, recording and sending quality information to a computer system, wherein in the step 2), after finishing the rolling of the online steel coil, an online surface detector or a manual work is adopted to detect the surface quality of the online steel coil;
in the step 3) and the step 4), the primary process computer system performs automatic coil stripping operation in the coil stripping process.
Preferably, in the step 3), the rolling production process data includes information of the defect level of the online steel coil, and when the included roll mark defect level reaches a degree of degradation of three or more levels, the secondary process computer system determines that the online steel coil is a non-final rolled coil.
Preferably, in the step 4), the online rerouting judgment model has the following judgment rule:
the thickness of the current online steel coil is HaAutomatically judging the thickness of the steel coil to be rolled again to be H according to the maximum rolling thickness of the online steel coil contained in the secondary process computer systema-1The maximum rolling thickness specification of the computer system in the second-stage process is Hmin<Hmin+1<……<Ha<Ha+1<……<HmaxIn which H isminFor the minimum thickness, H, of the coil of on-line steel allowable to be rolled in the secondary process computer systemmaxIs the maximum thickness, H, of the coil of steel allowed to be rolled in the secondary process computer systemmin、Hmin+1、……Ha、Ha+1、……HmaxA gauge thickness usable by a user;
when H is presenta＝HminThen, the secondary process computer system judges that the online steel coil is final rolling information, the online steel coil is automatically sealed, and the quality information is uploaded after being recorded;
when H is presenta≠HminThen, the second-level process computer system automatically calls the on-line steel coil rolling Ha-1And the rolling process parameters of the last pass in the thickness specification are sent to the primary process computer system, and the primary process computer system controls the on-line steel coil to be rolled again.
The invention provides an online processing method of surface rolling defects, which is suitable for the application that when a single-stand rolling mill rolls back and forth, surface roll marks can eliminate the defects through rolling again. The invention can eliminate the discovered defects of common roll marks and the like of the single-stand rolling mill on line in real time, realize the elimination of the defects, greatly reduce the quality cost, simultaneously control the computer to arrange the rolling in real time after the on-line real-time judgment, save the auxiliary operation time required by arranging the rolling again after coil stripping, and greatly improve the efficiency. The on-line treatment method is simple and easy to implement, and has good popularization and application prospects in the production process of non-oriented silicon steel rolling.
Drawings
FIG. 1 is a schematic diagram of a prior art manual inspection quality process flow;
FIG. 2 is a schematic diagram of a recording process flow of a conventional surface defect detector;
FIG. 3 is a schematic flow diagram of the on-line processing method of the present invention.
Detailed Description
In order to better understand the technical solutions of the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
Referring to fig. 3, the method for online processing of surface rolling defects provided by the present invention specifically includes the following steps:
1) establishing an online rolling change judgment model in a secondary process computer system;
2) after the online steel coil is rolled, an online surface detector or a manual work is adopted to detect the surface quality of the online steel coil, if the unreleasable roll marks are found, the primary process computer system does not perform coil unloading operation on the online steel coil;
3) adding a steel coil final rolling judgment function in a display picture of a secondary process computer system, after the primary process computer system controls the current online steel coil to be rolled, sending all rolling production process data to the secondary process computer system, wherein the rolling production process data comprises the current online steel coil defect grade condition, and when the contained defect grade such as roll mark reaches three-grade or more degradation degree, the secondary process computer system judges that the online steel coil is a non-final rolled coil and arranges to roll again; if the current online steel coil defect grade condition received by the secondary process computer system does not reach the degradation defect, the secondary process computer system judges that the online steel coil is rolled completely, and information is sent to the primary process computer system to perform automatic coil stripping operation;
4) When the secondary process computer system judges that the on-line steel coil is not the final rolled coil, recalculating the on-line steel coil by the on-line rolling change judgment model to judge whether the on-line steel coil can be rolled again or not, and eliminating the roll mark defect; the defects can be eliminated through the friction grinding effect of the roller and the compression deformation in the thickness direction of the steel coil in the rolling process;
the thickness of the current on-line steel coil is HaAutomatically judging the thickness of the steel coil to be rolled again to be H according to the maximum rolling thickness of the steel coil containing the online steel coil in the secondary process computer systema-1The maximum rolling thickness specification of the computer system in the second-stage process is Hmin<Hmin+1<……<Ha<Ha+1<……<HmaxIn which H isminMinimum thickness, H, allowable for rolling of on-line coil in secondary process computer systemmaxMaximum thickness, H, of allowable rolling for on-line coil in a two-stage process computer systemmin、Hmin+1、……Ha、Ha+1、……HmaxA gauge thickness usable by a user;
when H is presenta＝HminWhen the steel coil is finished, the secondary process computer system judges the on-line steel coil to be final rolling information, the on-line steel coil is automatically closed, and the quality information is uploaded after being recorded;
when H is presenta≠HminThen the secondary process computer system automatically calls the on-line steel coil rolling Ha-1And the rolling process parameters of the last pass in the thickness specification are sent to the primary process computer system, and the primary process computer system controls the on-line steel coil to be rolled again.
5) Repeating the steps 2) to 4) to judge the surface quality of the online steel coil after the secondary rolling again;
6) and after finishing the final rolling of the online steel coil, recording and sending the quality information to a secondary process computer system.
The primary computer is an execution control computer, receives parameters of the L2 computer, controls the field device, collects data and sends the data to the secondary computer.
The secondary computer is a model calculation, correction and adjustment computer, and is mainly used for receiving data in the L1 calculation production process, storing, analyzing and calculating the data, and simultaneously issuing parameters to the primary computer.
Example 1
When a certain rolling mill rolls a non-oriented silicon steel product with the specification of 0.30mm, after the non-oriented silicon steel product is rolled to the final thickness specification of 0.3mm on line, the rolling mark defect is found after the quality is manually checked, the grade is 4 (the grade of a degraded product), the system judges that rolling needs to be changed again, the secondary rolling thickness is 0.27mm, the system automatically calls rolling process parameters of 0.27mm, and the surface quality grade is judged to be a grade 1 product after secondary rolling, so that the rolling can be released, and the degradation of the coil is avoided.
Example 2
When a rolling mill rolls a new energy automobile brand product with the specification of 0.30mm, after the rolling mill rolls the new energy automobile brand product on line to the final thickness specification of 0.3mm, the rolling mark defect is found after the quality is manually checked, the grade is 4 (grade of degraded product), the system judges that the rolling is required to be changed again, the rolling thickness is 0.27mm again, the system automatically calls 0.27mm rolling process parameters, the surface quality grade is still judged to be a grade 3 product after the rolling is performed again, the system judges that the rolling is required to be performed again, calls 0.25mm rolling process parameters, and judges that the surface quality grade is 2 grade after the rolling is performed again, so that the rolling mill can be released, and the degradation of the roll is avoided.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that the changes and modifications of the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.
Claims (4)
1. An on-line treatment method for surface rolling defects, characterized by comprising the following steps:
1) establishing an online rolling change judgment model in a secondary process computer system;
2) the first-stage process computer system controls the current on-line steel coil rolling, and after the rolling is finished, all rolling production process data are sent to the second-stage process computer system;
3) the secondary process computer system judges whether the online steel coil is a non-final rolled coil, if not, the coil unloading process is carried out, and if so, the step 4) is carried out;
4) and recalculating and judging whether the online steel coil can be rolled again or not through the online rolling change judging model, eliminating the roll mark defect, entering the coil stripping process if the online steel coil can not be rolled again, and sending the rolling process parameters to the primary process computer system if the online steel coil can not be rolled again, wherein the primary process computer system controls the online steel coil to be rolled again.
2. The on-line treatment method of surface rolling defects according to claim 1, further comprising:
5) repeating the steps 2) to 4) to judge the surface quality of the online steel coil after the secondary rolling again;
6) after the on-line steel coil finish rolling is finished, the quality information record is sent to a computer system,
in the step 2), after the on-line steel coil is rolled, an on-line surface detector or a manual work is adopted to detect the surface quality of the on-line steel coil;
in the step 3) and the step 4), the primary process computer system performs automatic coil unloading operation in the coil unloading process.
3. The method for the on-line treatment of surface rolling defects according to claim 2, characterized in that: in the step 3), the rolling production process data includes the information of the defect grade of the online steel coil, and when the contained rolling mark defect grade reaches a degree of degradation of three or more grades, the secondary process computer system judges that the online steel coil is a non-final rolling coil.
4. The method for online processing of surface rolling defects according to claim 2, wherein in the step 4), the online rerouting judgment model is determined according to the following rules:
The thickness of the current online steel coil is HaAutomatically judging the thickness of the steel coil to be rolled again to be H according to the maximum rolling thickness of the online steel coil contained in the secondary process computer systema-1The maximum rolling thickness specification of the secondary process computer system is as follows:
Hmin<Hmin+1<……<Ha<Ha+1<……<Hmax，
wherein HminFor the minimum thickness that the on-line coil of steel can be rolled in the secondary process computer system,
Hmaxfor the maximum thickness that the on-line coil of steel can be rolled in the secondary process computer system,
Hmin、Hmin+1、……Ha、Ha+1、……Hmaxa gauge thickness usable by a user;
when H is presenta＝HminThen, the second-level process computer system judges that the online steel coil is finish rolling information, the online steel coil is automatically closed, and the quality information is uploaded after being recorded;
when H is presenta≠HminThen, the second-level process computer system automatically calls the on-line steel coil rolling Ha-1And the rolling process parameters of the last pass in the thickness specification are sent to the primary process computer system, and the primary process computer system controls the on-line steel coil to be rolled again.
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| CN202110051363.8A CN114762867B (en) | 2021-01-15 | 2021-01-15 | Online treatment method for surface rolling defects |
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| CN202110051363.8A CN114762867B (en) | 2021-01-15 | 2021-01-15 | Online treatment method for surface rolling defects |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211512A (en) * | 1997-01-28 | 1998-08-11 | Sumitomo Metal Ind Ltd | Method for controlling thickness of material to be rolled and device therefor |
| JP2001162309A (en) * | 1999-12-06 | 2001-06-19 | Kawasaki Steel Corp | Method for removing foreign matter on auxiliary roll of reversible rolling mill |
| JP2005059059A (en) * | 2003-08-13 | 2005-03-10 | Jfe Steel Kk | Method for manufacturing steel strip with less surface defect |
| KR20130002236A (en) * | 2011-06-28 | 2013-01-07 | 현대제철 주식회사 | Multiple controlled rolling method |
| TW201311371A (en) * | 2011-09-14 | 2013-03-16 | China Steel Corp | Steel strip pulling-back method for re-rolling |
| JP2013075301A (en) * | 2011-09-29 | 2013-04-25 | Hitachi Ltd | Device, method and program for controlling rolling |
| CN107983773A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of again rolling mill practice of hot-rolled stainless steel |
| CN109332394A (en) * | 2018-09-30 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | Eliminate the method that stainless steel wide cut cold plate rolls local heat slid wound defect |
| CN109500084A (en) * | 2018-12-06 | 2019-03-22 | 南阳汉冶特钢有限公司 | A kind of production method of novel medium plate |
| CN111299318A (en) * | 2020-03-02 | 2020-06-19 | 马鞍山钢铁股份有限公司 | Automatic determination method for surface quality of hot-rolled plate strip product |
-
2021
- 2021-01-15 CN CN202110051363.8A patent/CN114762867B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211512A (en) * | 1997-01-28 | 1998-08-11 | Sumitomo Metal Ind Ltd | Method for controlling thickness of material to be rolled and device therefor |
| JP2001162309A (en) * | 1999-12-06 | 2001-06-19 | Kawasaki Steel Corp | Method for removing foreign matter on auxiliary roll of reversible rolling mill |
| JP2005059059A (en) * | 2003-08-13 | 2005-03-10 | Jfe Steel Kk | Method for manufacturing steel strip with less surface defect |
| KR20130002236A (en) * | 2011-06-28 | 2013-01-07 | 현대제철 주식회사 | Multiple controlled rolling method |
| TW201311371A (en) * | 2011-09-14 | 2013-03-16 | China Steel Corp | Steel strip pulling-back method for re-rolling |
| JP2013075301A (en) * | 2011-09-29 | 2013-04-25 | Hitachi Ltd | Device, method and program for controlling rolling |
| CN107983773A (en) * | 2016-10-27 | 2018-05-04 | 福建宏旺实业有限公司 | A kind of again rolling mill practice of hot-rolled stainless steel |
| CN109332394A (en) * | 2018-09-30 | 2019-02-15 | 山西太钢不锈钢股份有限公司 | Eliminate the method that stainless steel wide cut cold plate rolls local heat slid wound defect |
| CN109500084A (en) * | 2018-12-06 | 2019-03-22 | 南阳汉冶特钢有限公司 | A kind of production method of novel medium plate |
| CN111299318A (en) * | 2020-03-02 | 2020-06-19 | 马鞍山钢铁股份有限公司 | Automatic determination method for surface quality of hot-rolled plate strip product |
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