EP0234739A1 - The manufacture of metal strip - Google Patents
The manufacture of metal strip Download PDFInfo
- Publication number
- EP0234739A1 EP0234739A1 EP87300677A EP87300677A EP0234739A1 EP 0234739 A1 EP0234739 A1 EP 0234739A1 EP 87300677 A EP87300677 A EP 87300677A EP 87300677 A EP87300677 A EP 87300677A EP 0234739 A1 EP0234739 A1 EP 0234739A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- mill
- spreading
- width
- stand
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/466—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 metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
Definitions
- a continuously cast metal workpiece is hot rolled between the rolls of a spreading mill to roll a groove in each of a pair of opposite faces of the workpiece and thereafter the workpiece is rolled in a multi-stand finishing mill to reduce the thickness and increase the width of the workpiece to form strip of a predetermined gauge and width.
- the required change in width is brought about by first forming the grooves in the opposite faces of the workpiece, which causes the width of the workpiece to be increased and thereafter by rolling the grooves out of the workpiece in the finishing mill to increase the width of the workpiece further.
- the workpiece may be passed directly from the continuous caster to the multi-stand spreading mill but it is likely to be more convenient to coil the output from the continuous caster and, at a later stage, to re-heat the coil, uncoil it and pass the workpiece between the stands of the multi-stand spreading mill.
- the workpiece leaving the spreading mill may be passed directly into the finishing mill but it is likely to be more convenient if the workpiece leaving the spreading mill is coiled and subsequently, after being re-heated if necessary, it is uncoiled into the finishing mill.
- Thin metal slabs are cast in a continuous casting machine 1.
- the thin slab 3 passes through the stands of a multi-stand spreading mill 5 where the width of the slab is increased and, on leaving the spreading mill, the slab is rolled to strip 7 of the required gauge and of still further increased width in a finishing mill 9.
- the uncoiler 15 carries a coil of metal slab 3 previously produced in one of the continuous casters.
- the coil is uncoiled and passed into the spreading mill 5, shown as having five two-roll stands.
- the pair of rolls 3A constituting the first stand of the spreading mill are each provided with a collar and the collars are shaped to form respective grooves 17 in the opposite faces of the slab.
- the provision of the grooves 17 cause the width of the slab to be increased slightly.
- the grooves 17 are progressively widened and thereby increase the width of the slab.
- reference 19 indicates the section of the grooved slab as it leaves the last stand of the spreading mill.
- the slab then either passes directly into the stands of the multi-stand finishing mill 9 where first the thickened edge portions of the slab are reduced in thickness thereby widening the slab still further and thereafter the slab is progressively reduced to the required gauge.
- the grooved slab leaving the spreading mill 5 is coiled in a coiler 21 and subsequently re-heated in a furnace 23 and uncoiled by an uncoiler 25 into the finishing mill 9.
- a typical example of the process of the invention is for the or each continuous casting machine 1 to produce a workpiece of 50 mm thickness and 1000 mm width.
- This workpiece is passed through the spreading mill and, when it leaves the spreading mill, it is still 50 mm thick at the edges and reduced to 25 mm at its center.
- the workpiece is reduced to a gauge (thickness) of 2 mm and its width is 1150 mm.
- the workpieces as cast in the continuous casting machines may have a width of between 600 -1900 mm and a thickness of between 30 - 75 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Bipolar Transistors (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
- This invention relates to a method of manufacturing metal strip by a rolling technique during which the width of the workpiece is increased.
- According to the present invention, in a method of manufacturing metal strip, a continuously cast metal workpiece is hot rolled between the rolls of a spreading mill to roll a groove in each of a pair of opposite faces of the workpiece and thereafter the workpiece is rolled in a multi-stand finishing mill to reduce the thickness and increase the width of the workpiece to form strip of a predetermined gauge and width.
- The required change in width is brought about by first forming the grooves in the opposite faces of the workpiece, which causes the width of the workpiece to be increased and thereafter by rolling the grooves out of the workpiece in the finishing mill to increase the width of the workpiece further.
- The workpiece may be passed directly from the continuous caster to the multi-stand spreading mill but it is likely to be more convenient to coil the output from the continuous caster and, at a later stage, to re-heat the coil, uncoil it and pass the workpiece between the stands of the multi-stand spreading mill.
- The workpiece leaving the spreading mill may be passed directly into the finishing mill but it is likely to be more convenient if the workpiece leaving the spreading mill is coiled and subsequently, after being re-heated if necessary, it is uncoiled into the finishing mill.
- In order that the invention may be more readily understood, it will now be described, by way of example only, with reference to the accompanying drawing, in which:-
- Figure 1 shows diagramatically the stages of the invention;
- Figure 2 shows diagramatically a workpiece being passed through a multi-stand spreading mill; and
- Figure 3 is an exaggerated plan of the workpiece as it passes through the spreading mill.
- Thin metal slabs are cast in a continuous casting machine 1. The
thin slab 3 passes through the stands of a multi-stand spreadingmill 5 where the width of the slab is increased and, on leaving the spreading mill, the slab is rolled to strip 7 of the required gauge and of still further increased width in a finishing mill 9. - As the capacities of the spreading and finishing mills are likely to be greater than that of a single continuous caster, it is envisaged that a number of casters 1 would be employed and the slabs produced by these casters would be coiled by
separate coilers 11. These coils would be re-heated in afurnace 13 and then passed to the mill where they would be unwound in turn by anuncoiler 15 and passed through the spreading mill into the finishing mill. - Referring to Figure 2, the
uncoiler 15 carries a coil ofmetal slab 3 previously produced in one of the continuous casters. The coil is uncoiled and passed into the spreadingmill 5, shown as having five two-roll stands. The pair of rolls 3A constituting the first stand of the spreading mill are each provided with a collar and the collars are shaped to form respective grooves 17 in the opposite faces of the slab. The provision of the grooves 17 cause the width of the slab to be increased slightly. As the slab passes through the succeeding stands of the spreading mill, the rolls of which have collars of increased width, the grooves 17 are progressively widened and thereby increase the width of the slab. In Figure 3,reference 19 indicates the section of the grooved slab as it leaves the last stand of the spreading mill. The slab then either passes directly into the stands of the multi-stand finishing mill 9 where first the thickened edge portions of the slab are reduced in thickness thereby widening the slab still further and thereafter the slab is progressively reduced to the required gauge. Alternatively the grooved slab leaving the spreadingmill 5 is coiled in acoiler 21 and subsequently re-heated in afurnace 23 and uncoiled by anuncoiler 25 into the finishing mill 9. - A typical example of the process of the invention is for the or each continuous casting machine 1 to produce a workpiece of 50 mm thickness and 1000 mm width.
- This workpiece is passed through the spreading mill and, when it leaves the spreading mill, it is still 50 mm thick at the edges and reduced to 25 mm at its center.
- Finally, after passing through the multi-stand finishing mill, the workpiece is reduced to a gauge (thickness) of 2 mm and its width is 1150 mm.
- In alternative forms, the workpieces as cast in the continuous casting machines may have a width of between 600 -1900 mm and a thickness of between 30 - 75 mm.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87300677T ATE57481T1 (en) | 1986-01-29 | 1987-01-27 | MANUFACTURE OF METAL STRIP. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8602163 | 1986-01-29 | ||
GB868602163A GB8602163D0 (en) | 1986-01-29 | 1986-01-29 | Metal strip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0234739A1 true EP0234739A1 (en) | 1987-09-02 |
EP0234739B1 EP0234739B1 (en) | 1990-10-17 |
Family
ID=10592148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87300677A Expired - Lifetime EP0234739B1 (en) | 1986-01-29 | 1987-01-27 | The manufacture of metal strip |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0234739B1 (en) |
AT (1) | ATE57481T1 (en) |
DE (1) | DE3765553D1 (en) |
FI (1) | FI82619C (en) |
GB (1) | GB8602163D0 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2056473A1 (en) * | 1969-11-19 | 1971-05-27 | Boehler & Co Ag Geb | Device for making strands |
EP0164265A2 (en) * | 1984-06-08 | 1985-12-11 | DAVY McKEE (SHEFFIELD) LIMITED | Method of rolling metal slab |
-
1986
- 1986-01-29 GB GB868602163A patent/GB8602163D0/en active Pending
-
1987
- 1987-01-27 DE DE8787300677T patent/DE3765553D1/en not_active Expired - Lifetime
- 1987-01-27 EP EP87300677A patent/EP0234739B1/en not_active Expired - Lifetime
- 1987-01-27 AT AT87300677T patent/ATE57481T1/en not_active IP Right Cessation
- 1987-01-28 FI FI870364A patent/FI82619C/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2056473A1 (en) * | 1969-11-19 | 1971-05-27 | Boehler & Co Ag Geb | Device for making strands |
EP0164265A2 (en) * | 1984-06-08 | 1985-12-11 | DAVY McKEE (SHEFFIELD) LIMITED | Method of rolling metal slab |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN, vol. 4, no. 154 (M-38)[636], 28th October 1980; & JP - A - 55 106 601 (NIPPON KOKAN) 15-08-1980 * |
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 47 (M-196)[1192], 24th February 1983; & JP - A - 57 195 509 (SUMITOMO KINZOKU KOGYO) 01-12-1982 * |
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 64 (M-285)[1501], 27th March 1984; & JP - A - 58 215 201 (KAWASAKI SEITETSU) 14-12-1983 * |
Also Published As
Publication number | Publication date |
---|---|
FI82619C (en) | 1991-04-10 |
DE3765553D1 (en) | 1990-11-22 |
GB8602163D0 (en) | 1986-03-05 |
FI870364A (en) | 1987-07-30 |
FI82619B (en) | 1990-12-31 |
FI870364A0 (en) | 1987-01-28 |
ATE57481T1 (en) | 1990-11-15 |
EP0234739B1 (en) | 1990-10-17 |
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