CN108526223B - Method for determining roller surface curve and roller - Google Patents
Method for determining roller surface curve and roller Download PDFInfo
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- CN108526223B CN108526223B CN201810297774.3A CN201810297774A CN108526223B CN 108526223 B CN108526223 B CN 108526223B CN 201810297774 A CN201810297774 A CN 201810297774A CN 108526223 B CN108526223 B CN 108526223B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/18—Roll crown; roll profile
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- Control Of Metal Rolling (AREA)
Abstract
The application provides a method for determining a roller surface curve and a roller, wherein the method for determining the roller surface curve comprises the following steps: determining the convexity of the cold hard coil of the acid rolling; determining convexity of the roller in the axial direction according to the convexity of the plate of the acid rolling chilled coil; determining convexity of the roller in the radial direction according to the ratio of the radial dimension of the roller before the acid rolling chilled coil after rolling annealing to the radial dimension of the roller after the acid rolling chilled coil after rolling annealing; and determining a roller surface curve according to the convexity in the axial direction and the convexity in the radial direction. By the technical scheme, the roll shape of the cold rolling leveling production line is correspondingly modified, the cold rolling shape is effectively improved, and the steel plate with good shape is obtained.
Description
Technical Field
The application relates to the technical field of metallurgy, in particular to a method for determining a roller surface curve and a roller.
Background
In the production process of steel plates, in order to obtain the steel plates with good plate shapes, which are flat and uniform in thickness, the original plate shapes of raw materials are generally required to be ensured to be flat, roll gaps of rolls are uniform in the rolling process, and the steel plates with good plate shapes can be obtained after the rolls are cooled uniformly.
The raw materials mainly refer to acid rolling hard coils required by cold rolling production. The external dimension of the acid-rolling chilled coil is mainly determined by upstream casting equipment and upstream cold rolling technology. The actual shape of the raw materials deviates from the theoretical value due to the installation precision of the basic construction equipment, the maintenance precision of the later equipment, the habitual operation of operators and the like. Once this defect occurs, it can only be ameliorated, but not completely eliminated, by downstream steps.
In order to obtain a flat and uniform thickness steel sheet, the distance between the two rolls should be equal in the rolling process, i.e. the roll gap is kept uniform, but in the actual rolling process there are many factors affecting the distance between the two rolls. The rolls must therefore be designed in a shape, known as the roll shape, which is predetermined according to the circumstances, to ensure a uniform roll gap during rolling. The change in shape of the roll gap will directly cause the change in the cross-sectional shape and planar shape of the steel sheet. The main factors influencing the shape of the roll gap are: the original roll shape of the roll, the control of the thermal convexity of the roll and the control of the roll shape. Wherein the original roll shape of the roll substantially determines the roll gap shape of the roll. The control of the thermal convexity of the roller mainly refers to the larger influence of the cooling mode and the cooling strength of the roller on the roller. The control of the roll shape refers to various roll shape control methods such as hydraulic roll bending modes, axial movement of rolls, crossing of rolls and the like, and can obviously improve the plate shape defect.
According to experience in actual production, the sheet convexity of the acid-rolled chilled coil can be directly inherited to the cold-rolled sheet, wherein the main reason is that the roll profile curve of the cold-rolled roll cannot be effectively adjusted according to the acid-rolled chilled coil convexity. The convexity of the acid rolling chilled rolls is poor, and the acid rolling chilled rolls have no influence on small stamping parts of low-end building materials, but have larger influence on middle-end and high-end users. In the cold rolling production process, for various reasons, a steel plate with perfect shape and convexity rarely appears, and great difficulty is brought to the production of downstream cold rolling.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art or related art.
In view of the above, an object of the present application is to provide a method for determining a roll surface curve.
Another object of the application is to provide a roll.
In order to achieve the above object, according to a first aspect of the present application, there is provided a method for determining a surface profile of a roll for cold rolling an annealed acid-rolled hard coil, comprising: determining the convexity of the cold hard coil of the acid rolling; determining convexity of the roller in the axial direction according to the convexity of the plate of the acid rolling chilled coil; determining convexity of the roller in the radial direction according to the ratio of the radial dimension of the roller before the acid rolling chilled coil after rolling annealing to the radial dimension of the roller after the acid rolling chilled coil after rolling annealing; and determining a roller surface curve according to the convexity in the axial direction and the convexity in the radial direction.
In the technical scheme, through the sampling research on the acid rolling chilled rolls, the acid rolling chilled rolls of a specific steel mill are generally regular and circulated. Through rule summarization, the roller shape of the downstream cold rolling leveling production line is correspondingly modified, so that the cold rolling plate shape can be effectively improved, and a steel plate with good plate shape is obtained. Specifically, firstly, determining the convexity of the acid rolling chilled roll, and determining the convexity of the roller in the axial direction according to the convexity of the acid rolling chilled roll; then determining convexity of the roller in the radial direction according to the ratio of the radial dimension of the roller before the acid rolling chilled coil after rolling and annealing to the radial dimension of the roller after the acid rolling chilled coil after rolling and annealing; the curve of the roller surface can be determined according to the convexity in the axial direction and the convexity in the radial direction, and after the roller with the curve of the roller surface is pressed, a steel plate with good plate shape can be obtained, thereby being convenient for downstream processing manufacturers to process.
Further, the convexity of the axial direction of the roller is determined according to the plate convexity of the acid-rolled chilled coil, and the method specifically comprises the following steps: measuring the thickness of the acid rolling chilled rolls at intervals of a preset length, and drawing a convexity curve of the acid rolling chilled rolls; and determining the plate convexity of the acid-rolling chilled roll according to the change value of the radial dimension of the roller before the acid-rolling chilled roll is rolled and annealed and the radial dimension of the roller after the acid-rolling chilled roll is rolled and annealed and the convexity curve of the acid-rolling chilled roll.
In the technical scheme, after the thickness of the acid rolling chilled roll is measured at intervals of a preset length, a convexity curve is drawn, and as the roller is worn during rolling of the acid rolling chilled roll, the convexity curve drawn is combined with the radial dimension of the roller before rolling the acid rolling chilled roll and the change value of the radial dimension of the roller after rolling the acid rolling chilled roll, so that the convexity condition of the acid rolling chilled roll can be obtained. After the convexity of the acid rolling chilled coil is obtained, the axial roller convexity of the cold rolling roller is correspondingly set, so that the rolling is more stable.
Further, the maximum value of convexity in the radial direction of the roll was 0.1mm.
Further, the convexity curve in the radial direction of the roll satisfies the relation: y=x 2 Wherein Y is the distance between the convexity curve and the axis of the roller, X is the curve length, and the origin is the critical point of the convexity curve and the convexity-free curve of the roller surface.
In the technical scheme, after the curve height of Y is determined, the value of X can be inversely deduced through a power function formula.
The second aspect of the present application provides a roll having the surface profile of the roll determined by the method for determining a surface profile of the roll of any one of the first aspect.
In the technical scheme, the curve of the roller can be designed according to the actual convexity condition of the acid-rolled chilled coil, and the rolled steel plate has good plate shape by using the roller, so that the processing of downstream processing factories is facilitated.
The beneficial effects of the application are as follows:
the curve of the roller can be designed according to the actual convexity condition of the acid rolling chilled coil, and the rolled steel plate has good plate shape by using the roller, thereby being convenient for downstream processing manufacturers to process.
Additional aspects and advantages of the application will be set forth in part in the description which follows, or may be learned by practice of the application.
Drawings
FIG. 1 shows a flow diagram of a method of determining a roll surface profile according to an embodiment of the application;
FIG. 2 shows a schematic representation of convexity of an ideal acid rolled chilled roll;
FIG. 3 shows a schematic representation of convexity of an acid rolled chilled roll in a real case;
fig. 4 shows a schematic view of the surface profile of the roll.
Detailed Description
The application is described in further detail below with reference to the drawings and the detailed description. It should be noted that the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
Some embodiments according to the present application are described below with reference to fig. 1 to 4.
Example 1:
as shown in fig. 1, according to a method for determining a surface curve of a roll according to an embodiment of the present application, the roll is used for cold rolling an annealed acid-rolled hard coil, and includes:
step S102, determining the plate convexity of the acid rolling chilled rolls;
step S104, determining convexity of the roller in the axial direction according to the plate convexity of the acid rolling chilled coil;
step S106, determining convexity of the roller in the radial direction according to the ratio of the radial dimension of the roller before the acid rolling chilled coil after the rolling annealing to the radial dimension of the acid rolling chilled coil after the rolling annealing;
and S108, determining a roller surface curve according to the convexity in the axial direction and the convexity in the radial direction.
In the steel plate production process, in order to obtain a steel plate with flatness and uniform thickness, namely good plate shape, it is generally required to ensure that the original plate shape of the acid rolling chilled roll is flat, the original plate shape convexity of the ideal acid rolling chilled roll is shown in fig. 2, and then deviation exists between the actual shape of the raw material and the theoretical value due to the reasons of installation precision of basic building equipment, maintenance precision of later equipment, habitual operation of operators and the like, and the original plate shape convexity of the actual acid rolling chilled roll is shown in fig. 3, so that the cold rolling plate shape can be effectively improved by correspondingly modifying the roller shape of a downstream cold rolling production line, and the steel plate with good plate shape is obtained. Specifically, firstly, determining the convexity of the acid rolling chilled roll, and determining the convexity of the roller in the axial direction according to the convexity of the acid rolling chilled roll; then determining convexity of the roller in the radial direction according to the ratio of the radial dimension of the roller before the acid rolling chilled coil after rolling and annealing to the radial dimension of the roller after the acid rolling chilled coil after rolling and annealing; the curve of the roller surface can be determined according to the convexity in the axial direction and the convexity in the radial direction, and after the roller with the curve of the roller surface is pressed, a steel plate with good plate shape can be obtained, thereby being convenient for downstream processing manufacturers to process.
Wherein, the convexity in the axial direction of the roll is determined according to the plate convexity of the acid rolling chilled roll, and the method specifically comprises the following steps: measuring the thickness of the acid rolling chilled rolls at intervals of a preset length, and drawing a convexity curve of the acid rolling chilled rolls; and determining the plate convexity of the acid-rolling chilled roll according to the change value of the radial dimension of the roller before the acid-rolling chilled roll is rolled and annealed and the radial dimension of the roller after the acid-rolling chilled roll is rolled and annealed and the convexity curve of the acid-rolling chilled roll.
In this embodiment, the thickness value of an acid rolling chilled roll is measured every 5cm, and the measuring instrument is a micrometer, and because the roller will wear during rolling the acid rolling chilled roll, the convexity condition of the acid rolling chilled roll can be obtained by considering the combination of the radial dimension of the roller before the acid rolling chilled roll is rolled and annealed and the change value of the radial dimension of the roller after the acid rolling chilled roll is rolled and annealed. After the convexity of the acid rolling chilled coil is obtained, the axial roller convexity of the cold rolling roller is correspondingly set, so that the rolling is more stable.
In this embodiment, as shown in fig. 4, the maximum value of convexity of the roll in the radial direction is 0.1mm, and the convexity curve of the roll in the radial direction satisfies the relation: y=x 2 Wherein Y is the distance between the convexity curve and the axis of the roller, X is the curve length, and the origin is the critical point of the convexity curve and the convexity-free curve of the roller surface.
After the curve height of Y is determined, the value of X can be deduced by a power function formula.
Example 2:
a roll according to an embodiment of the present application has a surface profile of the roll determined by the method of determining a surface profile of the roll in embodiment 1.
The curve of the roller can be designed according to the actual convexity condition of the acid rolling chilled coil, and the rolled steel plate has good plate shape by using the roller, thereby being convenient for downstream processing manufacturers to process.
The technical scheme of the application is described in detail above with reference to the accompanying drawings, and by using the roller, the rolled steel plate has good plate shape, thereby being convenient for downstream processing manufacturers to process.
The present application is not limited to the preferred embodiments, and any person skilled in the art will recognize that many modifications and variations can be made to the embodiments without departing from the scope of the application.
Claims (3)
1. A method of determining a surface profile of a roll for cold rolling an annealed acid-rolled chilled roll, comprising:
determining the convexity of the cold hard coil of the acid rolling;
determining convexity of the roller in the axial direction according to the plate convexity of the acid rolling chilled roll;
determining convexity of the roller in the radial direction according to the ratio of the radial dimension of the roller before the acid rolling chilled coil after rolling and annealing to the radial dimension of the roller after the acid rolling chilled coil after rolling and annealing; wherein the maximum value of convexity of the roller in the radial direction is 0.1mm, and the convexity curve of the roller in the radial direction satisfies the relation:
Y=X 2 ，
wherein Y is the distance between the convexity curve and the axis of the roller, X is the curve length, and the origin is the critical point of the convexity curve and the convexity-free curve on the surface of the roller;
and determining the roller surface curve according to the convexity in the axial direction and the convexity in the radial direction.
2. The method for determining a roll surface profile according to claim 1, characterized in that said determining convexity of the roll in the axial direction from the plate convexity of the acid rolled chilled roll comprises in particular:
measuring the thickness of the acid rolling chilled rolls at intervals of a preset length, and drawing a convexity curve of the acid rolling chilled rolls;
and determining the plate convexity of the acid rolling chilled roll according to the change value of the radial dimension of the roller before the acid rolling chilled roll is rolled and annealed and the radial dimension of the roller after the acid rolling chilled roll is rolled and annealed and the convexity curve of the acid rolling chilled roll.
3. A roll having the surface profile of the roll determined by the method for determining a surface profile of a roll according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810297774.3A CN108526223B (en) | 2018-04-04 | 2018-04-04 | Method for determining roller surface curve and roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810297774.3A CN108526223B (en) | 2018-04-04 | 2018-04-04 | Method for determining roller surface curve and roller |
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| CN108526223A CN108526223A (en) | 2018-09-14 |
| CN108526223B true CN108526223B (en) | 2023-08-25 |
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| CN113231479B (en) * | 2021-05-13 | 2022-07-08 | 鞍钢联众(广州)不锈钢有限公司 | Method for reducing plate shape defects of dry type leveling machine |
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| DE2815892A1 (en) * | 1978-03-02 | 1979-09-06 | Sumitomo Metal Ind | SLEEVE-SHAPED WORK ROLLER WITH ADJUSTABLE CLEARANCE FOR A ROLLING MILL |
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| JPH08108207A (en) * | 1994-10-06 | 1996-04-30 | Nippon Steel Corp | Method for learing/calculating roll profile of rolling roll |
| CN1640571A (en) * | 2004-01-12 | 2005-07-20 | 鞍钢集团新钢铁有限责任公司 | Continuous variable-convexity working roll and plate form control method using it |
| JP2005262312A (en) * | 2004-03-22 | 2005-09-29 | Jfe Steel Kk | Method for estimating thermal crown of rolling roll in hot rolling and method for manufacturing hot-rolled steel sheet |
| CN101214501A (en) * | 2007-12-27 | 2008-07-09 | 武汉钢铁(集团)公司 | Working roll consideration to strip steel convexity, edge drop control and abrasion control and using method |
| CN101559437A (en) * | 2009-05-20 | 2009-10-21 | 燕山大学 | Roll shape curve design method for 4-high tandem cold rolling mill by taking complex wave control as target |
| CN102847721A (en) * | 2011-06-29 | 2013-01-02 | 宝山钢铁股份有限公司 | Method for determining thermal crown of hot rolled strip roller |
| CN103736735A (en) * | 2013-12-25 | 2014-04-23 | 烨辉（中国）科技材料有限公司 | Intermediate roller for cold-roll steel sheet |
| CN108435797A (en) * | 2018-03-19 | 2018-08-24 | 包头钢铁（集团）有限责任公司 | The determination method and roll of roller surface curve |
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2018
- 2018-04-04 CN CN201810297774.3A patent/CN108526223B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2815892A1 (en) * | 1978-03-02 | 1979-09-06 | Sumitomo Metal Ind | SLEEVE-SHAPED WORK ROLLER WITH ADJUSTABLE CLEARANCE FOR A ROLLING MILL |
| CN2084397U (en) * | 1990-10-16 | 1991-09-11 | 青岛建筑工程学院 | Integral pressing cold rolling machine frame |
| JPH08108207A (en) * | 1994-10-06 | 1996-04-30 | Nippon Steel Corp | Method for learing/calculating roll profile of rolling roll |
| CN1640571A (en) * | 2004-01-12 | 2005-07-20 | 鞍钢集团新钢铁有限责任公司 | Continuous variable-convexity working roll and plate form control method using it |
| JP2005262312A (en) * | 2004-03-22 | 2005-09-29 | Jfe Steel Kk | Method for estimating thermal crown of rolling roll in hot rolling and method for manufacturing hot-rolled steel sheet |
| CN101214501A (en) * | 2007-12-27 | 2008-07-09 | 武汉钢铁(集团)公司 | Working roll consideration to strip steel convexity, edge drop control and abrasion control and using method |
| CN101559437A (en) * | 2009-05-20 | 2009-10-21 | 燕山大学 | Roll shape curve design method for 4-high tandem cold rolling mill by taking complex wave control as target |
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| CN103736735A (en) * | 2013-12-25 | 2014-04-23 | 烨辉（中国）科技材料有限公司 | Intermediate roller for cold-roll steel sheet |
| CN108435797A (en) * | 2018-03-19 | 2018-08-24 | 包头钢铁（集团）有限责任公司 | The determination method and roll of roller surface curve |
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| CN108526223A (en) | 2018-09-14 |
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