CN112893478A - Hot-rolled steel coil nominal width derivation method considering both cold rolling yield and production stability - Google Patents
Hot-rolled steel coil nominal width derivation method considering both cold rolling yield and production stability Download PDFInfo
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- CN112893478A CN112893478A CN202110251900.3A CN202110251900A CN112893478A CN 112893478 A CN112893478 A CN 112893478A CN 202110251900 A CN202110251900 A CN 202110251900A CN 112893478 A CN112893478 A CN 112893478A
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- cold rolling
- trimming
- nominal width
- rolled steel
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- 238000005097 cold rolling Methods 0.000 title claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000009795 derivation Methods 0.000 title description 3
- 238000009966 trimming Methods 0.000 claims abstract description 50
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 13
- 239000002436 steel type Substances 0.000 claims abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000137 annealing Methods 0.000 description 7
- 238000005246 galvanizing Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 2
Classifications
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention relates to a method for deducing the nominal width of a hot-rolled steel coil considering both the cold rolling yield and the production stability, belonging to the technical field of steel rolling. The technical scheme of the invention is as follows: firstly, determining the necking quantities of different procedures in a cold rolling area according to different steel types and different specifications so as to obtain the total necking quantity of the cold rolling procedure; considering that the trimming capabilities of the trimming shears of the cold rolling post-treatment line and the acid rolling line are different, and taking the minimum trimming amount of the trimming shears according to the change of trimming positions when the nominal width of the hot rolled steel coil is deduced; the nominal width of the hot-rolled steel coil considering the cold rolling delivery tolerance = the nominal width of the cold rolling + the total necking amount of the cold rolling process + the minimum trimming amount of the trimming shears + the cold rolling delivery tolerance. The invention has the beneficial effects that: the total necking quantity and the minimum trimming quantity of the trimming shears in the cold rolling procedure are comprehensively considered, so that the cold rolling yield can be improved, and the production stability of a cold rolling production line can be ensured.
Description
Technical Field
The invention relates to a method for deducing the nominal width of a hot-rolled steel coil considering both the cold rolling yield and the production stability, belonging to the technical field of steel rolling.
Background
At present, cold rolled products are all trimmed and delivered, and are required to be guaranteed within a tolerance range required by standards. A reasonable derivation method is needed for the nominal width of the hot rolled steel coil for cold rolling, the cold rolling yield is reduced if the nominal width of the hot rolled steel coil is too large, and the trimming edge cannot be cut or the trimming edge is not clean in the production process if the nominal width of the hot rolled steel coil is too small, so that the production stability of the whole production line is influenced.
Disclosure of Invention
The invention aims to provide a method for deducing the nominal width of a hot-rolled steel coil, which considers both the cold rolling yield and the production stability, comprehensively considers the total necking quantity and the minimum trimming quantity of trimming shears in the cold rolling process, can improve the cold rolling yield, can ensure the production stability of a cold rolling production line, and effectively solves the problems in the background art.
The technical scheme of the invention is as follows: the method for deducing the nominal width of the hot-rolled steel coil considering both the cold rolling yield and the production stability comprises the following steps: firstly, determining the necking quantities of different procedures in a cold rolling area according to different steel types and different specifications so as to obtain the total necking quantity of the cold rolling procedure; considering that the trimming capabilities of a cold rolling post-treatment line (galvanization or continuous annealing) and an acid rolling line trimming shear are different, and taking the minimum trimming amount of different trimming shears according to the change of trimming positions when the nominal width of the hot rolled steel coil is deduced; the nominal width of the hot-rolled steel coil considering the cold rolling delivery tolerance = the nominal width of the cold rolling + the total necking amount of the cold rolling process + the minimum trimming amount of the trimming shears + the cold rolling delivery tolerance.
The invention has the beneficial effects that: the total necking quantity and the minimum trimming quantity of the trimming shears in the cold rolling procedure are comprehensively considered, so that the cold rolling yield can be improved, and the production stability of a cold rolling production line can be ensured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the following describes technical solutions of the embodiments of the present invention clearly, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The method for deducing the nominal width of the hot-rolled steel coil considering both the cold rolling yield and the production stability comprises the following steps: firstly, determining the necking quantities of different procedures in a cold rolling area according to different steel types and different specifications so as to obtain the total necking quantity of the cold rolling procedure; considering that the trimming capabilities of a cold rolling post-treatment line (galvanization or continuous annealing) and an acid rolling line trimming shear are different, and taking the minimum trimming amount of different trimming shears according to the change of trimming positions when the nominal width of the hot rolled steel coil is deduced; the nominal width of the hot-rolled steel coil considering the cold rolling delivery tolerance = the nominal width of the cold rolling + the total necking amount of the cold rolling process + the minimum trimming amount of the trimming shears + the cold rolling delivery tolerance.
Example 1: taking a galvanized product as an example, the order information is as follows: nominal cold rolled thickness 1.0mm, nominal cold rolled width 1250mm, steel grade DX51D + Z, execution standard EN10346:2015, acid rolling cut.
Firstly, respectively determining the necking quantity of acid rolling and galvanizing according to the steel type and specification, wherein the necking quantity of the acid rolling is 1mm, the necking quantity of the galvanizing is 2mm, and the total necking quantity of a cold rolling procedure is 3 mm.
The order is acid rolling edge cutting, so the minimum trimming amount of the acid rolling edge cutting shear is 14mm (single edge 7 mm) when the nominal width of the hot rolled steel coil is deduced.
The cold rolling delivery tolerance of the order can be checked according to the steel type, specification and execution standard and is 0mm-6 mm. In order to ensure the controllable precision of the cold rolling width, the cold rolling delivery tolerance is taken to be 3mm when the nominal width of the hot rolled steel coil is deduced.
The nominal width of the hot-rolled steel coil deduced by the method = the nominal width of the cold rolling + the total necking amount of the cold rolling procedure + the minimum trimming amount of the trimming shears + the delivery tolerance of the cold rolling =1250+3+14+3=1270 mm.
Example 2: taking a galvanized product as an example, the order information is as follows: nominal cold rolling thickness 1.0mm, nominal cold rolling width 1250mm, steel grade DX51D + Z, execution standard EN10346:2015, galvanising trim.
Firstly, respectively determining the necking quantity of acid rolling and galvanizing according to the steel type and specification, wherein the necking quantity of the acid rolling is 1mm, the necking quantity of the galvanizing is 2mm, and the total necking quantity of a cold rolling procedure is 3 mm.
The order is galvanized trimming, so the minimum trimming amount of the galvanized trimming shears is 10mm (single side 5 mm) when the nominal width of the hot rolled steel coil is deduced.
The cold rolling delivery tolerance of the order can be checked according to the steel type, specification and execution standard and is 0mm-6 mm. In order to ensure the controllable precision of the cold rolling width, the cold rolling delivery tolerance is taken to be 3mm when the nominal width of the hot rolled steel coil is deduced.
The nominal width of the hot-rolled steel coil deduced by the method = the nominal width of the cold rolling + the total necking amount of the cold rolling procedure + the minimum trimming amount of the trimming shears + the delivery tolerance of the cold rolling =1250+3+10+3=1266 mm.
Example 3: taking a continuous annealing product as an example, the order information is as follows: the nominal thickness of the cold rolling is 2.0mm, the nominal width of the cold rolling is 1200mm, the steel grade is Q235, the execution standard is GB/T11253-2007, and the continuous annealing and trimming are carried out.
Firstly, respectively determining the necking quantity of acid rolling and galvanizing according to the steel type and specification, wherein the necking quantity of the acid rolling is 0mm, the continuous annealing necking quantity is 1mm, and the total necking quantity of a cold rolling procedure is 1 mm.
The order is continuous annealing trimming, so the minimum trimming amount of the continuous annealing trimming shears is measured when the nominal width of the hot rolled steel coil is deduced, and is 10mm (5 mm on one side).
The cold rolling delivery tolerance of the order can be checked according to the steel type, specification and execution standard and is 0mm-4 mm. In order to ensure the controllable precision of the cold rolling width, the cold rolling delivery tolerance is 2mm when the nominal width of the hot rolled steel coil is deduced.
The nominal width of the hot-rolled steel coil deduced by the method = the nominal width of the cold-rolling + the total necking amount of the cold-rolling procedure + the minimum trimming amount of the trimming shears + the delivery tolerance of the cold-rolling =1200+1+10+2=1213 mm.
Claims (1)
1. The method for deducing the nominal width of the hot-rolled steel coil considering both the cold rolling yield and the production stability is characterized by comprising the following steps of: firstly, determining the necking quantities of different procedures in a cold rolling area according to different steel types and different specifications so as to obtain the total necking quantity of the cold rolling procedure; considering that the trimming capabilities of the trimming shears of the cold rolling post-treatment line and the acid rolling line are different, and taking the minimum trimming amount of the trimming shears according to the change of trimming positions when the nominal width of the hot rolled steel coil is deduced; the nominal width of the hot-rolled steel coil considering the cold rolling delivery tolerance = the nominal width of the cold rolling + the total necking amount of the cold rolling process + the minimum trimming amount of the trimming shears + the cold rolling delivery tolerance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251900.3A CN112893478A (en) | 2021-03-08 | 2021-03-08 | Hot-rolled steel coil nominal width derivation method considering both cold rolling yield and production stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251900.3A CN112893478A (en) | 2021-03-08 | 2021-03-08 | Hot-rolled steel coil nominal width derivation method considering both cold rolling yield and production stability |
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| CN112893478A true CN112893478A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110251900.3A Pending CN112893478A (en) | 2021-03-08 | 2021-03-08 | Hot-rolled steel coil nominal width derivation method considering both cold rolling yield and production stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985478A (en) * | 2022-05-31 | 2022-09-02 | 马鞍山钢铁股份有限公司 | A dynamic optimization method for width target value and trimming amount between strip products |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912874A (en) * | 2010-07-14 | 2010-12-15 | 宁波钢铁有限公司 | Production method of preventing from coiling and pulling narrow of hot-rolled low carbon strip steels used for cold-rolled base plates |
| CN109940047A (en) * | 2019-03-28 | 2019-06-28 | 首钢智新迁安电磁材料有限公司 | A kind of method and device of silicon steel size Collaborative Control |
| CN112371730A (en) * | 2020-10-19 | 2021-02-19 | 马鞍山钢铁股份有限公司 | Control method for dimensional tolerance of continuous hot-dip galvanized finished product strip steel |
-
2021
- 2021-03-08 CN CN202110251900.3A patent/CN112893478A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912874A (en) * | 2010-07-14 | 2010-12-15 | 宁波钢铁有限公司 | Production method of preventing from coiling and pulling narrow of hot-rolled low carbon strip steels used for cold-rolled base plates |
| CN109940047A (en) * | 2019-03-28 | 2019-06-28 | 首钢智新迁安电磁材料有限公司 | A kind of method and device of silicon steel size Collaborative Control |
| CN112371730A (en) * | 2020-10-19 | 2021-02-19 | 马鞍山钢铁股份有限公司 | Control method for dimensional tolerance of continuous hot-dip galvanized finished product strip steel |
Non-Patent Citations (1)
| Title |
|---|
| 张明金等: "热轧宽带钢头尾拉窄的原因与控制措施 ", 《重型机械》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114985478A (en) * | 2022-05-31 | 2022-09-02 | 马鞍山钢铁股份有限公司 | A dynamic optimization method for width target value and trimming amount between strip products |
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Application publication date: 20210604 |