EP1454680A1 - Aluminium lamination process - Google Patents
Aluminium lamination process Download PDFInfo
- Publication number
- EP1454680A1 EP1454680A1 EP03380047A EP03380047A EP1454680A1 EP 1454680 A1 EP1454680 A1 EP 1454680A1 EP 03380047 A EP03380047 A EP 03380047A EP 03380047 A EP03380047 A EP 03380047A EP 1454680 A1 EP1454680 A1 EP 1454680A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- aluminum
- thickness
- sheet
- subjected
- 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.)
- Withdrawn
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000004411 aluminium Substances 0.000 title 1
- 238000003475 lamination Methods 0.000 title 1
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 238000005097 cold rolling Methods 0.000 claims abstract description 10
- 238000000137 annealing Methods 0.000 claims abstract description 7
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 238000005098 hot rolling Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Definitions
- the present invention refers to a new aluminum rolling process in which, preferably starting from scraps of this material as raw material, an aluminum strip is obtained with thickness in the range of 0.25 mm.
- the object of the invention is to obtain this result with a drastic reduction in process time, which could be placed in the range of 40%.
- the first system consists of hot-mill rolling, plus cold rolling and thermal treatments. More specifically, this system starts from rectangular aluminum blocks in the range of 50 cm high and 6 m long, the width of which is variable based on the width of the sheet intended to be obtained in the end, blocks commonly referred to as slabs, which on both their upper and lower face typically have slag and harmful elements for rolling, due to which an initial milling phase is carried out on both sides, after which the heating thereof ensues to a temperature comprised between 400 and 450°C. Then, they are introduced into a rolling mill which is provided with a roller table for transporting the strip in the longitudinal direction, and four rolling rollers, two working rollers and two support rollers, such that, upon clamping of the slab, the latter becomes thinner and longer.
- cold rolling follows in which the sheet undergoes three more passes through the corresponding rolling mill, attaining a 2 mm thickness for the aluminum sheet, but with a considerable increase in metal hardness, being thus necessary to carry out an annealing phase so that the cold rolling may proceed, the sheet undergoing two more passes until reaching the 0.6 mm thickness.
- the aluminum undergoes a new annealing and two new cold rolling passes in order to attain the definitive thickness intended to be obtained, 0.25 mm, with suitable mechanical properties.
- the different operative phases of this process consume a time which can be placed in the range of 41 hours.
- the second system which has been previously mentioned consists of a continuous casting process in which the liquid metal is obtained from melting scraps or ingots, urging said cast metal to pass between two rollers where, concurrently to its cooling and solidification, a continuous, 8 mm-thick sheet is produced.
- the rolling process proposed by the invention constitutes a significant technological advance in this field as it achieves, as previously mentioned, a new and drastic reduction in the process time, which can be placed in the range of 19 hours.
- said process also starts from an initial continuous casting phase for obtaining the cast metal which, immediately after exiting the furnace and, through the corresponding runner, is urged to pass through a twin-belt rolling machine where its solidification occurs, outputting a 19 mm-thick sheet at a speed of 8 or 9 m/min.
- the obtained strip is urged to pass in tandem through three successive hot rolling towers, in each one of which the aluminum sheet thickness is gradually reduced, reaching a level of 1.5 mm and at a speed of 100 m/min.
- the aluminum sheet is subjected to two cold rolling passes by which its 1.5 mm thickness becomes 0.54 mm, afterwards a conventional annealing phase is carried out, and it is finally subjected to a new pass through a cold roller where the 0.54 mm-thick aluminum sheet attains the definitive 0.25 mm thickness.
- a roller platform (7) is assembled at the machine (5) outlet connecting said machine to a first rolling tower (8), specifically hot rolling, with the classic support roller (9) and clamping roller (10) pair.
- a first rolling tower (8) specifically hot rolling
- the classic support roller (9) and clamping roller (10) pair Immediately after the rolling tower (8), there is another rolling tower (8') having identical features, and immediately after, a third tower (8"), such that at the outlet of the latter, the aluminum sheet has reached 1.5 mm thickness and advances at a speed of 100 m/min.
- two winding machines (9-9') are assembled, alternatively collecting the material in respective coils (10-10') whose parity is determined by the continuous character of the process, since the coils (10-10') are normally in the range of 5,000 kg compared to said 90 t furnace (1) load, being thus necessary that, in order not to interrupt the process, when the coil (10) reaches its maximum capacity, the winding machine (9) stops operating, winding machine (9') starting while the full coil (10) is removed from the first one.
- the elements corresponding to the end phases of the process have not been shown, in other words, the two cold rollers, the annealing furnace and also the cold end roller, as they constitute elements which structurally and functionally correspond to those with which a conventional continuous casting process also ends.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
Starting from a continuous casting furnace (1), fed with scraps, ingots
or any other aluminum presentation, the cast metal is urged to pass through
a solidification and rolling machine (5), a 19 mm-thick aluminum sheet being
obtained. Then, this sheet is subjected to three successive hot rolling phases
in respective rolling towers (8-8'-8"), attaining at its outlet a 1.5 mm
thickness. Then, the aluminum sheet is subjected to two cold rolling phases
until attaining a 0.54 mm thickness and, after intermediate annealing, it is
subjected to a final cold rolling phase in which the definitive 0.25 mm
thickness is obtained. The process achieves cutting the time of 34 hours
corresponding to a classic continuous casting process down to 19 hours.
Description
- The present invention refers to a new aluminum rolling process in which, preferably starting from scraps of this material as raw material, an aluminum strip is obtained with thickness in the range of 0.25 mm.
- The object of the invention is to obtain this result with a drastic reduction in process time, which could be placed in the range of 40%.
- For manufacturing rolled aluminum, in the form of coils, two systems are currently used.
- The first system consists of hot-mill rolling, plus cold rolling and thermal treatments. More specifically, this system starts from rectangular aluminum blocks in the range of 50 cm high and 6 m long, the width of which is variable based on the width of the sheet intended to be obtained in the end, blocks commonly referred to as slabs, which on both their upper and lower face typically have slag and harmful elements for rolling, due to which an initial milling phase is carried out on both sides, after which the heating thereof ensues to a temperature comprised between 400 and 450°C. Then, they are introduced into a rolling mill which is provided with a roller table for transporting the strip in the longitudinal direction, and four rolling rollers, two working rollers and two support rollers, such that, upon clamping of the slab, the latter becomes thinner and longer.
- After approximately 16 passes through said rolling mill, a strip with thickness in the range of 8 mm is obtained.
- After said hot rolling, cold rolling follows in which the sheet undergoes three more passes through the corresponding rolling mill, attaining a 2 mm thickness for the aluminum sheet, but with a considerable increase in metal hardness, being thus necessary to carry out an annealing phase so that the cold rolling may proceed, the sheet undergoing two more passes until reaching the 0.6 mm thickness. At this time and because of the same hardness problem, it is necessary that the aluminum undergoes a new annealing and two new cold rolling passes in order to attain the definitive thickness intended to be obtained, 0.25 mm, with suitable mechanical properties.
- The different operative phases of this process consume a time which can be placed in the range of 41 hours.
- The second system which has been previously mentioned consists of a continuous casting process in which the liquid metal is obtained from melting scraps or ingots, urging said cast metal to pass between two rollers where, concurrently to its cooling and solidification, a continuous, 8 mm-thick sheet is produced.
- In this case and in order to achieve the definitive 0.25 mm thickness, 5 passes through a cold rolling mill are carried out, subsequently the aluminum sheet is subjected to annealing, and it finally undergoes two new cold rolling passes.
- With this second system, the time of 41 hours of the previous system is reduced to 34 hours.
- The rolling process proposed by the invention constitutes a significant technological advance in this field as it achieves, as previously mentioned, a new and drastic reduction in the process time, which can be placed in the range of 19 hours.
- In order to do so, said process also starts from an initial continuous casting phase for obtaining the cast metal which, immediately after exiting the furnace and, through the corresponding runner, is urged to pass through a twin-belt rolling machine where its solidification occurs, outputting a 19 mm-thick sheet at a speed of 8 or 9 m/min.
- Afterwards, the obtained strip is urged to pass in tandem through three successive hot rolling towers, in each one of which the aluminum sheet thickness is gradually reduced, reaching a level of 1.5 mm and at a speed of 100 m/min.
- Then, the aluminum sheet is subjected to two cold rolling passes by which its 1.5 mm thickness becomes 0.54 mm, afterwards a conventional annealing phase is carried out, and it is finally subjected to a new pass through a cold roller where the 0.54 mm-thick aluminum sheet attains the definitive 0.25 mm thickness.
- To complement the description being made and for the purpose of helping to better understand the features of the invention according to a preferred practical embodiment thereof, a single sheet of drawings is attached to said description as an integral part thereof, which, with an illustrative and non-limiting character, shows a schematic side elevational view of a facility for putting into practice the aluminum rolling process constituting the object of the present invention.
- In view of the indicated figure, it can be seen how, for putting the process of the invention into practice, it starts with a furnace (1), for example with a 90 ton capacity, which will be fed with aluminum scraps, ingots or any other presentation form of this raw material, said furnace (1) being assembled on a rocking shaft (2) which, with the cooperation of a hydraulic system (3), allows the rocking thereof for dumping the cast aluminum into a runner (4) which carries it in the liquid phase to the twin-belt rolling machine (5) where the material's solidification occurs and a 19 mm-thick aluminum sheet (6) is obtained, a machine (5) which works at a speed of 8/9 m/min, as previously mentioned.
- A roller platform (7) is assembled at the machine (5) outlet connecting said machine to a first rolling tower (8), specifically hot rolling, with the classic support roller (9) and clamping roller (10) pair. Immediately after the rolling tower (8), there is another rolling tower (8') having identical features, and immediately after, a third tower (8"), such that at the outlet of the latter, the aluminum sheet has reached 1.5 mm thickness and advances at a speed of 100 m/min.
- Beyond the three hot rolling towers (8-8'-8"), two winding machines (9-9') are assembled, alternatively collecting the material in respective coils (10-10') whose parity is determined by the continuous character of the process, since the coils (10-10') are normally in the range of 5,000 kg compared to said 90 t furnace (1) load, being thus necessary that, in order not to interrupt the process, when the coil (10) reaches its maximum capacity, the winding machine (9) stops operating, winding machine (9') starting while the full coil (10) is removed from the first one.
- In the indicated figure, the elements corresponding to the end phases of the process have not been shown, in other words, the two cold rollers, the annealing furnace and also the cold end roller, as they constitute elements which structurally and functionally correspond to those with which a conventional continuous casting process also ends.
Claims (1)
- An aluminum rolling process in which aluminum scrap, aluminum ingots or any other presentation form thereof is used as the raw starting material, raw material which is melted in a furnace and which, by means of a continuous casting process, is fed into a stepped rolling facility, until attaining the definitive thickness in the range of 0.25 mm, characterized in that the following operative phases are established therein:After exiting the casting furnace (1), the cast metal is passed through a solidification-rolling machine (5) in which a 19 mm-thick sheet is obtained.Said 19 mm-thick sheet is subjected to three successive hot rolling phases in three rolling towers (8-8'-8") arranged in alignment, until reaching a thickness for the aluminum sheet in the range of 1.5 mm.After the winding of said sheet, the sheet is subjected to two passes through a cold roller until attaining a 54 mm thickness.Then, the aluminum sheet is subjected to an annealing phase.Finally, the annealed aluminum is subjected to a cold rolling phase in which the definitive 25 mm thickness is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03380047A EP1454680A1 (en) | 2003-03-04 | 2003-03-04 | Aluminium lamination process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03380047A EP1454680A1 (en) | 2003-03-04 | 2003-03-04 | Aluminium lamination process |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1454680A1 true EP1454680A1 (en) | 2004-09-08 |
Family
ID=32799166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03380047A Withdrawn EP1454680A1 (en) | 2003-03-04 | 2003-03-04 | Aluminium lamination process |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1454680A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4238248A (en) * | 1978-08-04 | 1980-12-09 | Swiss Aluminium Ltd. | Process for preparing low earing aluminum alloy strip on strip casting machine |
US5104465A (en) * | 1989-02-24 | 1992-04-14 | Golden Aluminum Company | Aluminum alloy sheet stock |
US5496423A (en) * | 1992-06-23 | 1996-03-05 | Kaiser Aluminum & Chemical Corporation | Method of manufacturing aluminum sheet stock using two sequences of continuous, in-line operations |
-
2003
- 2003-03-04 EP EP03380047A patent/EP1454680A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4238248A (en) * | 1978-08-04 | 1980-12-09 | Swiss Aluminium Ltd. | Process for preparing low earing aluminum alloy strip on strip casting machine |
US5104465A (en) * | 1989-02-24 | 1992-04-14 | Golden Aluminum Company | Aluminum alloy sheet stock |
US5496423A (en) * | 1992-06-23 | 1996-03-05 | Kaiser Aluminum & Chemical Corporation | Method of manufacturing aluminum sheet stock using two sequences of continuous, in-line operations |
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