EP1527830B1 - Rolling mill and method for manufacturing helically shaped metal strips - Google Patents
Rolling mill and method for manufacturing helically shaped metal strips Download PDFInfo
- Publication number
- EP1527830B1 EP1527830B1 EP04077892A EP04077892A EP1527830B1 EP 1527830 B1 EP1527830 B1 EP 1527830B1 EP 04077892 A EP04077892 A EP 04077892A EP 04077892 A EP04077892 A EP 04077892A EP 1527830 B1 EP1527830 B1 EP 1527830B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conveyor track
- trolley
- rolling mill
- rolling
- rollers
- 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.)
- Not-in-force
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
Definitions
- the invention relates to a rolling mill for milling helically shaped metal strips, comprising a frame, provided with at least three rollers of which at least one roller is mounted adjustable, drive means for driving at least one of the rollers and with supply means for the supply of metal strip to be rolled towards the rollers.
- a rolling mill is known from FR-A-1219379 .
- the rolling mill known from FR-A-1219379 is used for the production of metal cylinders.
- the metal strip is rolled so that successive windings fit together, after which the seam is closed by welding.
- the sidewards directed force, generated by the rolls, will now result in a sidewards movement of the first trolley together with the metal strip, which results in a qualitatively better end product, because the metal strip will not wriggle or slide between the rolls and its surface will remain practically undamaged. Moreover, the dimensions of the end product turn out to correspond better to the desired dimensions. Finally, during the rolling process, the metal strip may easily be moved with the aid of the first trolley after the adjustable roller has been disengaged, whereupon the rolling process can be resumed. In this way, relatively long helically shaped metal strips can be manufactured.
- a preferred embodiment of the invention with which the direction of the metal strip may be determined more accurately, without significantly increasing the friction in the conveyor track, is characterised in that the second conveyor track is at least near the frame provided with guiding means, for guiding the metal strip.
- a conveyor system comprising a first conveyor track, provided with a first slidable trolley, a second conveyor track, hingedly mounted to the first trolley and provided with a second slidable trolley with a clamping arrangement mounted onto it, suitable to be mounted as part of a rolling mill in accordance with claims 1 or 2.
- a preferred embodiment of the method of the invention is characterised in that the rolling of a strip is periodically interrupted, after which a mutual distance between at least two rollers of the system of rollers is increased, after which the material is moved in a direction parallel to the rollers, after which the distance between the at least two rolls is decreased to the starting position, after which the rolling is resumed.
- the rolling of a strip is periodically interrupted, after which a mutual distance between at least two rollers of the system of rollers is increased, after which the material is moved in a direction parallel to the rollers, after which the distance between the at least two rolls is decreased to the starting position, after which the rolling is resumed.
- Fig. 1 schematically represents a possible embodiment of a spiral staircase 1, provided with a stringboard 2 and a newel 3, between which steps 4 can be mounted. It may be noted that newel 3 may be lacking.
- the production of a stringboard is difficult, time consuming and usually there is quite a lot of scrap-iron and rejects.
- As a stringboard must be placed in or onto a finished building the demands with regard to the accuracy of the dimensions are high. For that reason, parts of the stringboard are usually cut out of a solid steel plate which has previously been rolled, after which these parts are welded together.
- Fig. 2A schematically represents a solid steel plate 4, which is rolled in a rolling mill according to the state of the art in a direction indicated by an arrow, with a diameter that corresponds with the diameter of stringboard 2, after which for example parts 5a,5b,5c may be cut out of steel plate 4 and welded together in a longitudinal direction. Obviously, much material is spilled, while welding together the relatively short parts may have a negative effect on the accuracy.
- Fig. 2B schematically represents a composite steel plate 6, consisting of a strip-shaped part 7 which will become part of stringboard 2 and which is welded inside a frame 8, also put together of strips made of steel plate.
- Composite steel plate 6 is rolled in a rolling mill according to the state of the art in a direction indicated by an arrow, with a diameter that corresponds with the diameter of stringboard 2, after which strip-shaped part 7 is cut out of composite steel plate 6 and used.
- the presence of strip-shaped part 7 will generate a force perpendicular to the rolling direction.
- the aim of frame 8 is to prevent this force from causing composite steel plate 6 to make unwanted movements, which could negatively influence the accuracy, in fact by imitating a solid steel plate.
- a strip-shaped part 7 is guided between the rolls of the rolling mill, of which the rolls have been adjusted such that strip-shaped part 7 will be rolled to a diameter which corresponds to the diameter of stringboard 2.
- the direction of strip-shaped part 7 is stabilised with mechanical means.
- the force acting onto strip-shaped part 7 in a direction rectangular to the rolling direction results in a sidewards movement of strip-shaped part 7, which movement is according to the invention permitted and even not opposed at all.
- Fig. 3 schematically represents a possible embodiment of a rolling mill according to the invention, consisting of a frame 9 in which two driven, adjustable rolls 10a, 10b are placed and one non-adjustable possibly driven roll 11.
- a first conveyor track 12 is mounted, in this embodiment consisting of a steel profile, onto which a first trolley 13 may ride or slide freely.
- a second conveyor track 15 is hingedly mounted round a hinge point 16. The angle between first conveyor track 12 and second conveyor track 15 may be selected with the aid of an adjusting rod 17, mounted between mounting plate 14 and second conveyor track 15.
- Via second conveyor track 15 a strip, not shown here, is supplied to the rolling mill, in the process of which the strip is clamped in a clamp 18 which is mounted onto a second trolley 19 which may ride or slide freely over second conveyor track 15. Close to the rolling mill, the strip is sidewards supported with the aid of two rolls 20a,20b.
- the rolls 10a, 10b, 11 can pull the strip inwards, with the angle being completely determined, while the strip is free to move in a sidewards direction.
- a free end of second conveyor track 15 is supported, for example with the aid of a leg 22 mounted onto a swivelling wheel 21.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
- The invention relates to a rolling mill for milling helically shaped metal strips, comprising a frame, provided with at least three rollers of which at least one roller is mounted adjustable, drive means for driving at least one of the rollers and with supply means for the supply of metal strip to be rolled towards the rollers. Such a rolling mill is known from
FR-A-1219379 - The rolling mill known from
FR-A-1219379 - It is well known in the art that while rolling a helically shaped strip, a sidewards directed force will be generated, which tends to wriggle and slide the metal strip, which in turn may deteriorate the surface structure of the end product.
- This problem is solved by the rolling mill according to
claim 1. - The sidewards directed force, generated by the rolls, will now result in a sidewards movement of the first trolley together with the metal strip, which results in a qualitatively better end product, because the metal strip will not wriggle or slide between the rolls and its surface will remain practically undamaged. Moreover, the dimensions of the end product turn out to correspond better to the desired dimensions. Finally, during the rolling process, the metal strip may easily be moved with the aid of the first trolley after the adjustable roller has been disengaged, whereupon the rolling process can be resumed. In this way, relatively long helically shaped metal strips can be manufactured.
- From
DE-B-1022445 an arrangement for winding helically shaped springs is known, provided with a mandrel, drive means for rotating and shifting the mandrel and a conveyor track which is hingedly mounted to the frame for adjusting a pitch of the spring. It is also provided with a trolley, slidably mounted onto the conveyor track and provided with a clamping arrangement for clamping the material to be wound. - A preferred embodiment of the invention with which the direction of the metal strip may be determined more accurately, without significantly increasing the friction in the conveyor track, is characterised in that the second conveyor track is at least near the frame provided with guiding means, for guiding the metal strip.
- The problem is also solved by a conveyor system comprising a first conveyor track, provided with a first slidable trolley, a second conveyor track, hingedly mounted to the first trolley and provided with a second slidable trolley with a clamping arrangement mounted onto it, suitable to be mounted as part of a rolling mill in accordance with
claims - Lastly, a method for rolling helically shaped metal strips, like for example stringboards of staircases, is claimed, using a rolling mill according to
claim 1. - A preferred embodiment of the method of the invention is characterised in that the rolling of a strip is periodically interrupted, after which a mutual distance between at least two rollers of the system of rollers is increased, after which the material is moved in a direction parallel to the rollers, after which the distance between the at least two rolls is decreased to the starting position, after which the rolling is resumed. In this way, relatively long helically shaped strips can be rolled, because the metal strip can be shifted sidewards in case it approaches an end of the rolls.
- The invention will now be further explained with a reference to the following figures, in which:
- Fig. 1
- schematically represents a possible embodiment of a spiral staircase, provided with a stringboard;
- Fig. 2A
- schematically represents a solid steel plate, out of which parts of the stringboard may be cut after it has been rolled;
- Fig. 2B
- schematically represents a composite steel plate, out of part of the stringboard may be cut after it has been rolled;
- Fig. 3
- schematically represents a possible embodiment of a rolling mill according to the invention.
-
Fig. 1 schematically represents a possible embodiment of aspiral staircase 1, provided with astringboard 2 and anewel 3, between whichsteps 4 can be mounted. It may be noted thatnewel 3 may be lacking. The production of a stringboard is difficult, time consuming and usually there is quite a lot of scrap-iron and rejects. As a stringboard must be placed in or onto a finished building, the demands with regard to the accuracy of the dimensions are high. For that reason, parts of the stringboard are usually cut out of a solid steel plate which has previously been rolled, after which these parts are welded together. -
Fig. 2A schematically represents asolid steel plate 4, which is rolled in a rolling mill according to the state of the art in a direction indicated by an arrow, with a diameter that corresponds with the diameter ofstringboard 2, after which forexample parts 5a,5b,5c may be cut out ofsteel plate 4 and welded together in a longitudinal direction. Obviously, much material is spilled, while welding together the relatively short parts may have a negative effect on the accuracy. -
Fig. 2B schematically represents a composite steel plate 6, consisting of a strip-shaped part 7 which will become part ofstringboard 2 and which is welded inside a frame 8, also put together of strips made of steel plate. Composite steel plate 6 is rolled in a rolling mill according to the state of the art in a direction indicated by an arrow, with a diameter that corresponds with the diameter ofstringboard 2, after which strip-shaped part 7 is cut out of composite steel plate 6 and used. During rolling, the presence of strip-shaped part 7 will generate a force perpendicular to the rolling direction. The aim of frame 8 is to prevent this force from causing composite steel plate 6 to make unwanted movements, which could negatively influence the accuracy, in fact by imitating a solid steel plate. - With the rolling mill according to the invention, only a strip-shaped part 7 is guided between the rolls of the rolling mill, of which the rolls have been adjusted such that strip-shaped part 7 will be rolled to a diameter which corresponds to the diameter of
stringboard 2. During rolling, the direction of strip-shaped part 7 is stabilised with mechanical means. The force acting onto strip-shaped part 7 in a direction rectangular to the rolling direction results in a sidewards movement of strip-shaped part 7, which movement is according to the invention permitted and even not opposed at all.Fig. 3 schematically represents a possible embodiment of a rolling mill according to the invention, consisting of aframe 9 in which two driven,adjustable rolls roll 11. Parallel to rolls 10a, 10b, 11, afirst conveyor track 12 is mounted, in this embodiment consisting of a steel profile, onto which afirst trolley 13 may ride or slide freely. To a mounting plate 14, connected tofirst trolley 13, asecond conveyor track 15 is hingedly mounted round ahinge point 16. The angle betweenfirst conveyor track 12 andsecond conveyor track 15 may be selected with the aid of an adjusting rod 17, mounted between mounting plate 14 andsecond conveyor track 15. Via second conveyor track 15 a strip, not shown here, is supplied to the rolling mill, in the process of which the strip is clamped in aclamp 18 which is mounted onto asecond trolley 19 which may ride or slide freely oversecond conveyor track 15. Close to the rolling mill, the strip is sidewards supported with the aid of tworolls rolls second conveyor track 15 is supported, for example with the aid of aleg 22 mounted onto aswivelling wheel 21. As soon as the strip approaches due to the sidewards movement an end of a roll, one slightly lowersrolls first trolley 13 andsecond conveyor track 15. Thenrolls
Claims (5)
- Rolling mill for milling helically shaped metal strips, like for example stringboards (2) of staircases (1), comprising a frame (9), provided with at least three rollers (10a, 10b, 11),of which at least one roller (10a,10b) is mounted adjustable, drive means for driving at least one of the rollers (10a,10b) and with supply means for the supply of metal strip to be rolled towards the rollers (10a,10b,11), whereby the supply means comprise a first conveyor track (12), mounted to the frame (9) of the rolling mill at least substantially parallel to a non-adjustable roll (11), which first conveyor track (12) is provided with a first trolley (13) slidably mounted thereon, and a second conveyor track (15), having a second trolley (19) slidably mounted thereon and provided with a clamping arrangement (18) for clamping the metal strip, the second conveyor track (15) being hingedly connected to the first trolley (13).
- Rolling mill according to claim 1, characterised in that the second conveyor track (15) is at least near the frame (9) provided with guiding means (20a,20b), for guiding the metal strip.
- Conveyor system, comprising a first conveyor track (12), provided with a first slidable trolley (13), a second conveyor track (15), hingedly mounted to the first trolley (13) and provided with a second slidable trolley (19) with a clamping arrangement (18) mounted onto it, suitable to be mounted as part of a rolling mill in accordance with claims 1 or 2.
- Method for rolling helically shaped metal strips, like for example stringboards (2) of staircases (1), using a rolling mill according to claim 1.
- Method according to claim 4, characterised in that the rolling of a strip is periodically interrupted, after which a mutual distance between at least two rollers of the system of rollers (10a,10b,11) is increased, after which the material is moved in a direction parallel to the rollers, after which the distance between the at least two rolls is decreased to the starting position, after which the rolling is resumed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1024637 | 2003-10-28 | ||
NL1024637A NL1024637C2 (en) | 2003-10-28 | 2003-10-28 | Rolling device and method for rolling helical metal frames. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1527830A1 EP1527830A1 (en) | 2005-05-04 |
EP1527830B1 true EP1527830B1 (en) | 2008-04-23 |
Family
ID=34420829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04077892A Not-in-force EP1527830B1 (en) | 2003-10-28 | 2004-10-22 | Rolling mill and method for manufacturing helically shaped metal strips |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1527830B1 (en) |
AT (1) | ATE392961T1 (en) |
DE (1) | DE602004013251T2 (en) |
NL (1) | NL1024637C2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105499382B (en) * | 2014-10-16 | 2017-11-28 | 五冶集团上海有限公司 | A kind of roll bending angle control mould and preparation method thereof |
CN106001207A (en) * | 2016-08-17 | 2016-10-12 | 江苏机机械科技有限公司 | Large three-roller plate rolling machine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT186954B (en) * | 1953-08-13 | 1956-10-10 | Steirische Gussstahlwerke | Device for winding coil springs |
FR1219379A (en) * | 1958-12-26 | 1960-05-17 | Metaux Inoxydables Ouvres | Improvements in the manufacture of metal cylinders |
DE3524940C2 (en) * | 1985-07-12 | 1995-06-01 | Blohm Voss Ag | Device for producing short, thick-walled pipe sections |
-
2003
- 2003-10-28 NL NL1024637A patent/NL1024637C2/en not_active IP Right Cessation
-
2004
- 2004-10-22 DE DE602004013251T patent/DE602004013251T2/en active Active
- 2004-10-22 AT AT04077892T patent/ATE392961T1/en not_active IP Right Cessation
- 2004-10-22 EP EP04077892A patent/EP1527830B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
ATE392961T1 (en) | 2008-05-15 |
EP1527830A1 (en) | 2005-05-04 |
NL1024637C2 (en) | 2005-05-02 |
DE602004013251T2 (en) | 2009-06-25 |
DE602004013251D1 (en) | 2008-06-05 |
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