CN113210437A - Production process of high-precision cold-rolled sheet - Google Patents
Production process of high-precision cold-rolled sheet Download PDFInfo
- Publication number
- CN113210437A CN113210437A CN202110552594.7A CN202110552594A CN113210437A CN 113210437 A CN113210437 A CN 113210437A CN 202110552594 A CN202110552594 A CN 202110552594A CN 113210437 A CN113210437 A CN 113210437A
- Authority
- CN
- China
- Prior art keywords
- precision
- control
- control range
- requirement
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a production process of a high-precision cold-rolled sheet, which comprises the following steps: the convexity control range of the hot rolling raw material is 30 +/-20 mu m, and the wedge shape does not exceed the convexity control range; judging other low-precision products exceeding the control requirement; rolling by a cold rolling mill according to the thickness control precision of +/-1%; printing a thickness curve graph to confirm the control precision after the steel coil is produced, cutting off the part which cannot meet the requirement, and judging the steel coil which cannot be cut off into a product with low precision requirement; the elongation control range of the temper mill is 1.0 +/-0.1 percent, and steel coils out of the control range are changed to judge products with low precision requirements; the elongation control range of the recoiling withdrawal and straightening machine is 0.8 +/-0.1 percent, and the steel coil out of the control range is changed and judged into a product with low precision requirement; and measuring the thicknesses of the head and the tail, and cutting off the part exceeding the target control precision.
Description
Technical Field
The invention relates to a production process of a high-precision cold-rolled sheet. In particular to a high thickness precision production process for common cold rolled coils.
Background
With the development of modern processing industry, the automation level of a processing production line is continuously improved, the thickness precision requirement of downstream users on cold-rolled steel plates of a steel mill is higher and higher, the thickness precision of the cold-rolled steel plates is gradually improved to +/-2 percent or even +/-1 percent from +/-10 percent of the initial target thickness, and the thickness precision of the cold-rolled steel plates with the target thickness of 1.0mm must reach +/-0.01 mm.
The invention discloses a method for monitoring AGC (automatic gain control) in rapid high-precision plate strip rolling, which is mainly used for carrying out the thickness precision of a cold-rolled steel plate by an online feedback iterative control method, for example, a northeast university patent CN200610045735.1, and comprises the following steps: firstly, inputting relevant data of a rolling system and strip steel, wherein the data comprises the following data: the rigidity coefficient M of the rolling mill, the plasticity coefficient Q of the strip steel and the distance Lg of the thickness gauge from the central line of the rolling mill roll; determining a proportional coefficient K of the thickness control object, wherein K = M/M + Q; setting a sample tracking length Ls = Ls/n; fourthly, the elimination rate a of the integral regulator is taken; the computer collects the thickness gauge at multiple points to the thickness difference delta h measured value of each designated sample length ls (i), and determines the average thickness difference delta h (i) of the sample at the moment i by calculation; sixthly, calculating the additional value of the roll gap of the rolling mill, wherein the control rate delta S (i) at the ith moment is calculated by the following recursion formula: Δ s (i) ((1-a)) Δ s (i-1) + a Δ s (i-n-1) + a/K Δ h (i). The invention has very fast response speed and higher static control precision, and the thickness control precision is higher than 1% on the premise that the measurement precision of the thickness gauge meets the requirement.
At present, the practical situation of cold rolling production is that the thickness precision of the automatic control of the cold rolling thickness has a relatively accurate problem, the thickness precision fluctuates along with the fluctuation of the thickness of the incoming material, and the fluctuation relates to the change of convexity and wedge shape, so the process control of key processes from hot rolling incoming material to the upstream and downstream of cold rolling rewinding is needed to achieve the result that the thickness precision of the product is controllable, and the defects in the prior art are overcome.
Disclosure of Invention
The invention aims to develop a production process of a high-precision cold-rolled sheet, which controls the thickness precision of the cold-rolled sheet within a target range.
The technical scheme of the invention is as follows: a production process of a high-precision cold-rolled sheet comprises the following steps: 1. the convexity control range of the hot rolling raw material is 30 +/-20 mu m, and the wedge shape does not exceed the convexity control range; judging other low-precision products exceeding the control requirement; 2. rolling by a cold rolling mill according to the thickness control precision of +/-1%; printing a thickness curve graph to confirm the control precision after the steel coil is produced, cutting off the part which cannot meet the requirement, and judging the steel coil which cannot be cut off into a product with low precision requirement; 3. the elongation control range of the temper mill is 1.0 +/-0.1 percent, and steel coils out of the control range are changed to judge products with low precision requirements; 4. the elongation control range of the recoiling withdrawal and straightening machine is 0.8 +/-0.1 percent, and the steel coil out of the control range is changed and judged into a product with low precision requirement; 5. and measuring the thicknesses of the head and the tail, and cutting off the part exceeding the target control precision.
The invention has the beneficial effects that: by applying the high-thickness precision production process of the common cold-rolled sheet, the production of the high-precision cold-rolled sheet can be better realized, and the thickness precision of the product produced by adopting the process of the invention meets the target control requirement. By adopting the process, the common cold-rolled steel coil meeting the precision requirement of downstream users can be produced under the limited equipment precision on the premise of the traditional cold-rolling production line, and a new way for producing high-precision cold-rolled steel coils is developed.
Detailed Description
A production process of a high-precision cold-rolled sheet comprises the following steps: 1. the convexity control range of the hot rolling raw material is 30 +/-20 mu m, and the wedge shape does not exceed the convexity control range; judging other low-precision products exceeding the control requirement; 2. rolling by a cold rolling mill according to the thickness control precision of +/-1%; printing a thickness curve graph to confirm the control precision after the steel coil is produced, cutting off the part which cannot meet the requirement, and judging the steel coil which cannot be cut off into a product with low precision requirement; 3. the elongation control range of the temper mill is 1.0 +/-0.1 percent, and steel coils out of the control range are changed to judge products with low precision requirements; 4. the elongation control range of the recoiling withdrawal and straightening machine is 0.8 +/-0.1 percent, and the steel coil out of the control range is changed and judged into a product with low precision requirement; 5. and measuring the thicknesses of the head and the tail, and cutting off the part exceeding the target control precision.
Claims (1)
1. The production process of the high-precision cold-rolled sheet is characterized by comprising the following steps of: which comprises the following steps:
the convexity control range of the hot rolling raw material is 30 +/-20 mu m, and the wedge shape does not exceed the convexity control range; judging other low-precision products exceeding the control requirement;
rolling by a cold rolling mill according to the thickness control precision of +/-1%; printing a thickness curve graph to confirm the control precision after the steel coil is produced, cutting off the part which cannot meet the requirement, and judging the steel coil which cannot be cut off into a product with low precision requirement;
the elongation control range of the temper mill is 1.0 +/-0.1 percent, and steel coils out of the control range are changed to judge products with low precision requirements;
the elongation control range of the recoiling withdrawal and straightening machine is 0.8 +/-0.1 percent, and the steel coil out of the control range is changed and judged into a product with low precision requirement;
5) and measuring the thicknesses of the head and the tail, and cutting off the part exceeding the target control precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110552594.7A CN113210437A (en) | 2021-05-20 | 2021-05-20 | Production process of high-precision cold-rolled sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110552594.7A CN113210437A (en) | 2021-05-20 | 2021-05-20 | Production process of high-precision cold-rolled sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113210437A true CN113210437A (en) | 2021-08-06 |
Family
ID=77093371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110552594.7A Pending CN113210437A (en) | 2021-05-20 | 2021-05-20 | Production process of high-precision cold-rolled sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113210437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443931A (en) * | 2023-12-22 | 2024-01-26 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054302A (en) * | 1989-04-07 | 1991-10-08 | Kawasaki Steel Corporation | Hardness compensated thickness control method for wet skin-pass rolled sheet |
| CN105689392A (en) * | 2016-04-01 | 2016-06-22 | 莱芜市泰山冷轧板有限公司 | Production method for ultra-thin cold-rolled enamelled steel strips |
| CN107442576A (en) * | 2016-05-31 | 2017-12-08 | 本钢板材股份有限公司 | A kind of control method of cold-rolled products dimensional accuracy |
| CN107649512A (en) * | 2017-09-08 | 2018-02-02 | 新余钢铁股份有限公司 | A kind of manufacturing process of 65Mn cold rollings wide strip |
| CN109702011A (en) * | 2019-03-12 | 2019-05-03 | 山东泰山钢铁集团有限公司 | A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide and its production method |
| CN111872122A (en) * | 2020-05-20 | 2020-11-03 | 江苏创泰特钢制品有限公司 | Production process of high-precision cold-rolled sheet |
-
2021
- 2021-05-20 CN CN202110552594.7A patent/CN113210437A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054302A (en) * | 1989-04-07 | 1991-10-08 | Kawasaki Steel Corporation | Hardness compensated thickness control method for wet skin-pass rolled sheet |
| CN105689392A (en) * | 2016-04-01 | 2016-06-22 | 莱芜市泰山冷轧板有限公司 | Production method for ultra-thin cold-rolled enamelled steel strips |
| CN107442576A (en) * | 2016-05-31 | 2017-12-08 | 本钢板材股份有限公司 | A kind of control method of cold-rolled products dimensional accuracy |
| CN107649512A (en) * | 2017-09-08 | 2018-02-02 | 新余钢铁股份有限公司 | A kind of manufacturing process of 65Mn cold rollings wide strip |
| CN109702011A (en) * | 2019-03-12 | 2019-05-03 | 山东泰山钢铁集团有限公司 | A kind of tape measure 50 steel cold-rolled strip of high-precision ultra-wide and its production method |
| CN111872122A (en) * | 2020-05-20 | 2020-11-03 | 江苏创泰特钢制品有限公司 | Production process of high-precision cold-rolled sheet |
Non-Patent Citations (1)
| Title |
|---|
| 蒋赞等: "防盗门专用冷轧板的生产实践", 《河北冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117443931A (en) * | 2023-12-22 | 2024-01-26 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
| CN117443931B (en) * | 2023-12-22 | 2024-02-20 | 冶科金属有限公司 | Austenitic stainless steel rolling equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104942019B (en) | A kind of cold rolling of strip steel process Automatic control method of width | |
| CN104096714B (en) | A kind of hot-strip convexity autocontrol method | |
| GB2059316A (en) | Temperature control in hot strip mill | |
| CN109013712B (en) | Reduction rate compensation method during cold continuous rolling dynamic specification changing | |
| CN110899338A (en) | Preparation method of hot-rolled strip steel | |
| CN112845613A (en) | Thickness control method and device for hot-rolled strip steel and terminal equipment | |
| CN113210437A (en) | Production process of high-precision cold-rolled sheet | |
| US7354492B2 (en) | Method for optimising the production technology of rolled products | |
| CN115335158B (en) | Method, control system and production line for controlling strip flatness of rolled material | |
| CN110586660B (en) | Self-adaptive single-stand rolling mill feedforward thickness control method | |
| CN111001772B (en) | Method and device for controlling roll gap under light pressing or heavy pressing | |
| CN113020319A (en) | Strip steel leveling process method and production line | |
| JP3930847B2 (en) | Thick plate rolling method | |
| CN113680829B (en) | Novel sickle elbow pre-control method | |
| CN110842024B (en) | Method and device for shearing strip steel | |
| JP3520868B2 (en) | Steel sheet manufacturing method | |
| KR101528690B1 (en) | Method for manufacturing steel sheet | |
| JP4671544B2 (en) | Sheet width control method in cold tandem rolling | |
| CN111451294B (en) | Method for improving strip shape precision of hot-rolled strip steel | |
| KR101442903B1 (en) | Method for dividing hot rolled strip and system thereof | |
| KR20050068252A (en) | Cooling control technique using dynamic preset updating | |
| KR100325335B1 (en) | Method for predicting roll force in cold rolling | |
| JP2979974B2 (en) | Control method of mechanical properties of cold rolled steel sheet | |
| CN118663699A (en) | Dynamic correction method for outlet thickness set value of cold continuous rolling mill | |
| CN115532831A (en) | Cold continuous rolling method and hot rolling maintenance device for high-strength steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210806 |