CN110639951A - Method for preventing annealing heat drum on surface of double-zero aluminum foil - Google Patents
Method for preventing annealing heat drum on surface of double-zero aluminum foil Download PDFInfo
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- CN110639951A CN110639951A CN201910898300.9A CN201910898300A CN110639951A CN 110639951 A CN110639951 A CN 110639951A CN 201910898300 A CN201910898300 A CN 201910898300A CN 110639951 A CN110639951 A CN 110639951A
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- aluminum foil
- roller
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- B21B2267/19—Thermal crown
Abstract
The invention discloses a method for preventing annealing heat drum on the surface of a double-zero aluminum foil, which belongs to the technical field of nonferrous metal processing and comprises the following steps: selecting an aluminum foil blank, wherein the convexity of the aluminum foil blank is within 5 per thousand, and the thickness of the aluminum foil blank is 0.26 mm; step 2) rolling the blank into a finished product in four passes, wherein the four passes are divided into two cogging passes, one middle pass and one finish rolling pass; wherein, the cogging pass uses a roller with the roughness of 0.4Cr, the roller convexity is 20 per mill, and the target plate shape curve is-17; the roll grinding curve for the four passes was sin90 °. By using the method, the aluminum foil strength performance meeting the oil removal performance and market requirements of the aluminum foil is ensured, the side effect of the heat drum caused in the annealing and temperature rising process of the double-zero aluminum foil is reduced, the amount of waste materials caused by the annealing heat drum of the aluminum foil is greatly reduced, and the yield is improved. Especially, the aluminum foil packaging market tends to be wider and lower in price competition period, so that the production efficiency is improved, and the production cost is reduced.
Description
Technical Field
The invention relates to an annealing process, in particular to a process method for preventing aluminum foil from being hot-rolled during surface annealing, and belongs to the technical field of nonferrous metal processing.
Background
In china, an aluminum foil with an aluminum foil thickness of less than 0.01mm, i.e., two zeros behind a decimal point (e.g., 0.0055-0.009 mm) is generally called a double-zero aluminum foil, and internationally called a thin foil (light gauge foil); aluminum foil products are generally classified into aluminum foils for cigarettes, aluminum foils for flexible packages (applicable to packaging of foods, medicines, and the like), aluminum foils for capacitors, and the like according to the final use thereof, but various aluminum foils require good plate shapes regardless of the final use thereof in any field.
At present, the international aluminum foil production generally adopts a roller type rolling process, and rolling oil is used as lubricating oil in the rolling process. The key of the plate shape control is to control the shape of the working roller well. The control panel shape mainly includes: the original roll shape control, the thermal crown control and the automatic control system of the rolling mill plate shape of the roller. The roll profile just ground is called the original roll profile and is mainly determined by the grinding curve and the grinding set crown at the time of roll grinding. The heated roll shape is called a work roll shape and is mainly affected by temperature. The rolling mill plate shape control system corrects the actual plate shape through a set target plate shape curve, and the main modes comprise roll sectional cooling, roll bending, inclination and the like.
The gap between the rollers is called as the roller gap, and the shape of the roller gap is effectively adjusted, so that the rolling shape is improved. The purpose of strip shape control is to make the rolled stock extend uniformly throughout, i.e., to make the inlet cross-sectional shape similar to the outlet cross-sectional shape. Different roll gap shapes correspond to different rolled piece cross section shapes, so that the shape of the rolled piece inlet cross section can be well controlled when the roll gap shape is adjusted to be similar to the rolled piece inlet cross section shape.
If the defective portion of the aluminum foil is cut off due to defective shape, the cutting width is generally 0.2 m, and in a serious case, the cutting width is 0.4 m. An aluminum foil production plant with an annual output of 2 ten thousand tons has an average aluminum foil width of 1m, a cut-off portion of 0.2 m on average, and 2% defective plate-shaped products, and the amount of aluminum foil cut off per year is about 80 tons. Meanwhile, the bad plate shape affects the delivery of the product, and brings great problems to production and operation.
Disclosure of Invention
Aiming at the quality problem of poor plate shape of the double-zero aluminum foil, the invention aims to provide the method for preventing the annealing heat drum on the surface of the double-zero aluminum foil, which can effectively improve the plate shape of the double-zero aluminum foil, reduce the cutting waste generated by the poor plate shape, reduce the production cost and improve the order delivery capacity.
In order to realize the purpose, the invention adopts the following technical scheme:
a method for preventing annealing heat drum on the surface of a double-zero aluminum foil comprises the following steps:
1) selecting an aluminum foil blank, wherein the convexity of the aluminum foil blank is within 5 per mill, and the thickness of the aluminum foil blank is 0.26 mm;
2) rolling the blank into a finished product in four passes, wherein the four passes are divided into two cogging passes, one middle pass and one finish rolling pass; wherein the content of the first and second substances,
the cogging pass uses a roller with the roughness of 0.4Cr, the roller convexity is 20 per mill, and the target plate shape curve is-17;
the medium rolling pass process parameters are as follows:
the finish rolling pass process parameters are as follows:
the grinding curve of the roller used for four passes is sin90 degrees sine curve.
In a preferred embodiment, the roll crown and the target strip shape curve are controlled according to the thickness of the finished product, and the thicker the finished product is, the larger the roll crown and the larger the target strip shape curve are in the middle rolling pass and the finish rolling pass.
In the preferred embodiment, the roller convexity is specifically formulated according to the requirements of rolling speed and product pinholes, when the speed needs to be controlled to ensure the pinhole index, the roller with lower roughness is used, and the roller with higher roughness is used for normal products.
In the preferred embodiment, the rolling rolls must be pulled using a common roll for the sheet pass and the finishing pass, and the time for the pulling rolls is at least 30 minutes.
The invention has the beneficial effects that: the method for preventing the annealing heat drum on the surface of the double-zero aluminum foil ensures that the oil removal performance of the aluminum foil and the strength performance of the aluminum foil required by the market are met, reduces the heat drum side effect brought in the annealing temperature rise process of the double-zero aluminum foil to the maximum extent, provides high-quality aluminum foil for the market, greatly reduces the waste amount caused by the annealing heat drum of the aluminum foil, and improves the yield. Especially, the aluminum foil packaging market tends to be wider and lower in price competition period, so that the production efficiency is improved, and the production cost is reduced. The problem of puzzled the shape of the double-zero aluminum foil badly for a long time is solved, in particular to the problem that the shapes of aluminum foils with different finished product thicknesses are obviously different during production. The method directly and effectively reduces the trimming amount of the defective plate-shaped product, improves the yield of the aluminum foil, reduces the production cost, improves the order delivery rate, and has important significance for enhancing the credit and the competitiveness of enterprises.
Detailed Description
To more clearly illustrate embodiments of the present invention or solutions in the prior art, the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these examples provide those skilled in the art with an understanding of the teachings of the present invention.
Unless otherwise defined, terms (including technical and scientific terms) used herein should be construed to have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Inventive example 1
According to the process parameters disclosed by the invention, the aluminum foil with the blank thickness of 0.26mm is rolled, and the specific process parameters are as follows:
after rolling is finished, the plate shape is verified through a splitting machine and a rewinding machine, and no bad plate shape condition is found.
Comparative example 1
The convexity and target plate shape curves of the medium rolling and the finish rolling rollers are not rolled according to the process parameters disclosed by the invention, and the process parameters are as follows:
after rolling is finished, the plate shape is verified through a splitting machine and a rewinding machine, the phenomenon that the plate shape is poor occurs to different degrees of products, the edges of the thicker products are looser, and edge swinging is generated.
Comparative example 2
The roll grinding curve is set to be sin60 degrees for rolling, and the process parameters are as follows:
after rolling is finished, the plate shape is verified through a splitting machine and a rewinding machine, the bad plate shape condition occurs to different degrees of all products, the plate shape is embodied as rib part looseness, and two rib waves are generated during splitting and rewinding.
By analyzing the product condition obtained by rolling the aluminum foil under different process parameters through the embodiment, the method for preventing the annealing heat drum on the surface of the double-zero aluminum foil disclosed by the invention is proved to be capable of practically and effectively solving the problem of poor shape of the aluminum foil, reducing the amount of cutting waste materials generated by the poor shape and reducing the production cost of enterprises.
While the invention has been described herein with reference to specific aspects, features and illustrative embodiments of the invention, it will be appreciated that the invention is not thus limited in its application, but extends to and encompasses numerous other variations, modifications and alternative embodiments, as will suggest themselves to those of ordinary skill in the art to which the invention pertains, based on the disclosure herein. Accordingly, any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A method for preventing annealing heat drum on the surface of a double-zero aluminum foil is characterized by comprising the following steps:
1) selecting an aluminum foil blank, wherein the convexity of the aluminum foil blank is within 5 per mill, and the thickness of the aluminum foil blank is 0.26 mm;
2) rolling the blank into a finished product in four passes, wherein the four passes are divided into two cogging passes, one middle pass and one finish rolling pass; wherein the content of the first and second substances,
the cogging pass uses a roller with the roughness of 0.4Cr, the roller convexity is 20 per mill, and the target plate shape curve is-17;
the medium rolling pass process parameters are as follows:
the finish rolling pass process parameters are as follows:
the grinding curve of the roller used for four passes is sin90 degrees sine curve.
2. The method for preventing the surface annealing heat drum of the double-zero aluminum foil as claimed in claim 1, wherein: and controlling the roll convexity and the target plate shape curve according to the thickness of the finished product, wherein the thicker the finished product is, the larger the roll convexity and the larger the target plate shape curve are in the middle rolling pass and the finish rolling pass.
3. The method for preventing the surface annealing heat drum of the double-zero aluminum foil as claimed in claim 1, wherein: the convexity of the roller is set according to the requirements of rolling speed and product pinholes, and when the pinhole index is ensured by controlling the speed, the roller with lower roughness is used, and the roller with higher roughness is used for normal products.
4. The method for preventing the surface annealing heat drum of the double-zero aluminum foil as claimed in claim 1, wherein: and in the single-sheet pass and the finish rolling pass, the roller is pulled by using a common material roll, and the rolling time of the pulling roller is at least 30 minutes.
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| CN201910898300.9A CN110639951B (en) | 2019-09-23 | 2019-09-23 | Method for preventing annealing heat drum on surface of double-zero aluminum foil |
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| CN201910898300.9A CN110639951B (en) | 2019-09-23 | 2019-09-23 | Method for preventing annealing heat drum on surface of double-zero aluminum foil |
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| CN110639951B CN110639951B (en) | 2021-02-12 |
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| JP2004298938A (en) * | 2003-03-31 | 2004-10-28 | Kobe Steel Ltd | Aluminum sheet and aluminum foil and method for manufacturing them |
| CN101797584A (en) * | 2010-02-11 | 2010-08-11 | 山东南山铝业股份有限公司 | Four-pass aluminum foil rolling process |
| CN102744255A (en) * | 2012-07-07 | 2012-10-24 | 华北铝业有限公司 | Process for producing battery aluminium foil |
| EP2857114A1 (en) * | 2013-09-30 | 2015-04-08 | Alu-Vertriebsstelle Ag | Method of manufacturing aluminium foil and aluminium foil |
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| CN108723088A (en) * | 2018-04-23 | 2018-11-02 | 昆山铝业有限公司 | The method that drum has been eliminated in aluminium foil high-speed rolling |
| CN110000209A (en) * | 2019-03-11 | 2019-07-12 | 江苏鼎胜新能源材料股份有限公司 | 4 passes method of 0.005mm thickness aluminium foil |
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2019
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| JP2004298938A (en) * | 2003-03-31 | 2004-10-28 | Kobe Steel Ltd | Aluminum sheet and aluminum foil and method for manufacturing them |
| CN101797584A (en) * | 2010-02-11 | 2010-08-11 | 山东南山铝业股份有限公司 | Four-pass aluminum foil rolling process |
| CN102744255A (en) * | 2012-07-07 | 2012-10-24 | 华北铝业有限公司 | Process for producing battery aluminium foil |
| EP2857114A1 (en) * | 2013-09-30 | 2015-04-08 | Alu-Vertriebsstelle Ag | Method of manufacturing aluminium foil and aluminium foil |
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