EP3068553A1 - Multiroll rolling mill incorporating a hatch - Google Patents
Multiroll rolling mill incorporating a hatchInfo
- Publication number
- EP3068553A1 EP3068553A1 EP14809930.2A EP14809930A EP3068553A1 EP 3068553 A1 EP3068553 A1 EP 3068553A1 EP 14809930 A EP14809930 A EP 14809930A EP 3068553 A1 EP3068553 A1 EP 3068553A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gate
- rolling mill
- rolls
- main door
- cylinders
- 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
- 238000005096 rolling process Methods 0.000 title claims abstract description 80
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 230000000284 resting effect Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
- B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/18—Adjusting or positioning rolls by moving rolls axially
Definitions
- the present invention relates to the field of rolling mills, and relates more particularly to cold rolling mills.
- the present invention thus finds an advantageous application for multicylinder mills, such mills being typically "Sendzimir” mills.
- Cold rolling makes it possible to obtain the final thickness of a metal strip by successive passes of this strip between rolls in the presence of high forces simultaneously in pressure and in tension.
- a "Sendzimir” type mill has a plurality of rolls, or rolls, which are arranged relative to each other to allow the change of the mechanical characteristics of a metal strip and to obtain a strip thickness which may be less than 3 millimeters. .
- a "Sendzimir” rolling mill which can comprise twenty cylinders is known; an exemplary embodiment of such a twenty-roll mill is illustrated in US 5 193 377 and US 5 471 859.
- This Figure 1 shows a schematic view of a cross section of a rolling mill with twenty cylinders.
- the cylinders are distributed in a lower group Gi and an upper group Gs; more precisely, these groups Gi and Gs have a symmetrical structure and each comprise ten cylinders including: a working cylinder 12, two first intermediate cylinders 13, three second intermediate cylinders 14 and 15, and four support cylinders, or rollers of support, which are outside the arrangement and which are denoted A, B, C and D for the upper group Gs and E, F, G, H for the lower group Gi.
- this truck can make its approach run of the rolling mill after full opening of the main door; Conversely, the main door can not start closing until the cylinder change carriage has moved away from the area swept by the main door.
- FIG. 2a there is a solution consisting in equipping the main door PP of the LA mill with a simple PT gate located in the center of the latter: such a PT gate allows a quick and secure change of the cylinders of 12 and the first intermediate cylinders 13, this without requiring the opening of the main door PP.
- the opening and closing of such a gate PT (lighter and less cumbersome than the main door) are much faster and less dangerous than the opening and closing of the main door PP.
- the opening and closing of the simple gate accept the presence of the cylinder disassembly carriage near the roll stand.
- the PT gate therefore allows the operator to perform the replacement of the cylinders 12 and 13 safely, because the main door PP LA rolling mill remains closed during maintenance operations.
- the device for lateral displacement of the first intermediate cylinders can only be a "push-pull” type system (or in English "push-pull”).
- Such a “push-pull” system illustrated in FIG. 2b, comprises an arrangement of hydraulic cylinders VH configured to "push” and “pull” alternately the first intermediate cylinders 13; such a system is installed in the bottom of the roll stand.
- This "push-pull" system requires the use of an AT coupling arrangement to securely assemble the hydraulic cylinders VH with the first intermediate cylinders 13.
- the push-pull system uses complex parts and SA suspension cylinders, which are subject to rapid wear and breakage during rolling incidents.
- rolling mills incorporating a device for lateral displacement of the first cylinders of "rickshaw” type (or in English “push-push”), such a system illustrated in FIG. 3 being described in document EP 1 213,060.
- the "rickshaw” system consists of an arrangement of hydraulic cylinders at the front VH_AV and at the rear VH_AR, each of these hydraulic cylinders VH_AV and VH_AR being configured to adjust the position of the first intermediate cylinders 13 by exerting only a thrust force on the bearing surfaces of the cylinder stops 13.
- the rickshaw system is therefore more robust than the push-pull system.
- the arms of this one should be lengthened, but in this case the pivots of the gate would be located at the edge of the main door and would hinder the complete opening of the main door necessary for the disassembly of the second intermediate cylinders and bearing rollers.
- the Applicant submits that the state of the art offers no satisfactory solution to combine, on a Sendzimir type mill, a "rickshaw" system with a gate, while maintaining the opening capabilities of the machine. gate and the main gate.
- the present invention aims to improve the situation described above.
- One of the objectives of the present invention is to easily access the working rolls (and possibly the intermediate rolls) on a "Sendzimir” type mill incorporating a “rickshaw” system, without opening the main door.
- the object of the present invention relates to a rolling mill, for example a "Sendzimir” type mill, which advantageously comprises a roll stand containing a plurality of rolls, preferably twenty rolls.
- rolls of the rolling mill there are at least two working rolls and two pairs of rolls, called intermediate rolls; these intermediate rolls are arranged together to support the two working rolls in the rolling direction.
- Such a mill may for example be a twenty-roll mill type "Sendzimir” as described above and illustrated in Figure 1.
- the rolling mill according to the present invention comprises a main door on the front of the rolling mill, this main door being able to open to allow access to all cylinders.
- This main door has an opening.
- the rolling mill according to the present invention further comprises a device for lateral displacement of the intermediate rolls.
- lateral displacement it should be understood here a lateral displacement with respect to the direction of rolling.
- the lateral displacement device is of the "rickshaw" type: thus, the lateral displacement device comprises a first pair of two hydraulic cylinders positioned at the bottom of the rolling mill stand and a second pair of two hydraulic cylinders positioned in position. facade of the rolling mill cage.
- each hydraulic cylinder has a portion intended to bear on one end of the intermediate cylinders, and is configured to exert a thrust force to allow lateral displacement of the intermediate cylinders.
- the rolling mill comprises a removable gate adapted to have at least one open position and one closed position.
- the gate closes the opening in the main door and serves as a lateral stop for the working rolls and possibly the intermediate rolls.
- the gate In the open position, the gate allows access to the working cylinders and possibly to the intermediate cylinders.
- the gate is configured to integrate the second pair of the two hydraulic cylinders.
- the opening and closing of the gate do not impede the opening and closing of the main door.
- the kinematics relating to the opening and closing of the gate is made independently of the opening and closing of the main door.
- the opening of the gate is complete: it is possible to remove and replace the working rolls and possibly the first intermediate rolls.
- the gate according to the present invention comprises motorization means to allow opening and / or motorized closure of the gate.
- the rolling mill comprises control means configured to remotely control the drive means.
- the gate according to the present invention further comprises at least one detector connected to the motorization means and configured to control the opening and closing of the gate.
- the detector detects an obstacle on the path of opening or closing the gate, then, in this case, the detector can prevent the opening or closing of the gate.
- the gate comprises fixing means.
- these fixing means are fixed on the main door and are configured to integrally assemble the door with the main door, in particular in the closed position.
- the fixing means are fixed on the roll stand and are configured to integrally assemble the door with the roll stand, especially in the closed position.
- the main door in the closed position is sandwiched between the door and the cage.
- the main door is removable and is able to be temporarily disconnected from the roll stand.
- the fixing means are configured such that, in the open position, the gate is disengaged from the main door.
- the rolling mill further comprises a carriage which is able to be positioned near the gate and which has rails on which, when the gate is detached from the main door, the gate is able to translate up to a stop to reach the open position and allow access to the work rolls and possibly to the intermediate rolls.
- this translation is instrumented by a motorization and gearing system to drive the gate in a controlled manner to the stop.
- This clever embodiment facilitates the work of the operators because it limits the manipulations of the gate, and allows to completely free the field of work in front of the opening of the main door and thus release access to the work rolls and possibly to intermediate cylinders when the gate is in the open position.
- the carriage comprises a treadmill.
- a treadmill allows the lift of the rolls and thus promotes the removal and introduction of the working rolls and possibly the intermediate rolls of the roll stand, when the gate is in the open position.
- the carriage further comprises height adjustment means to allow the height adjustment of the conveyor belt with respect to the working rolls and the intermediate rolls that it is desired to extract from the roll stand.
- these adjustment means comprise at least one hydraulic cylinder.
- the gate is equipped with a clamp which has gripping means for holding at least one cylinder and which is configured to drive said at least one cylinder in a translation movement when the gate is opened until in the open position to at least partially extract said at least one cylinder from the roll stand (10).
- the fixing means comprise fixing clamps.
- Such fastening means secures the attachment of the door with the main door (or with the roll stand) in the closed position, and thus avoids opening of the door under the transverse rolling forces.
- Those skilled in the art will understand here that other equivalent fastening means may also be considered in the context of the present invention to allow a closed position in which the door is fixed integrally with the main door (or with the roll stand) , and an open position in which the gate is disengaged from the main door (or the roll stand) and can thus be positioned against the stop of the carriage.
- the fixing means comprise retraction means which are fixed on the main door; these means are located beyond the main door opposite the means of retraction of the main door, the retraction means of the main door being fixed integrally on the roll stand.
- the opening and closing of the gate does not hinder the opening and closing of the main door.
- the retraction means of the gate and / or the main door consist of a hinge system.
- Such hinge systems extend substantially in the height of the rolling mill.
- the means of retraction of the gate are positioned closer to the edge of the main door opposite the edge on which are fixed the means of retraction of the main door.
- the kinematics relating to the opening and closing of the gate does not hinder the kinematics relating to the opening and closing of the main door.
- the means for retracting the door are fixed to the door by a pair of arms.
- the fastening means comprise a locking mechanism coupled to the retraction means, such a locking mechanism comprising a lever-operable hook to permit locking of the door in the closed position.
- a locking mechanism coupled to the retraction means, such a locking mechanism comprising a lever-operable hook to permit locking of the door in the closed position.
- other equivalent locking mechanisms may also be contemplated within the scope of the present invention to allow a closed position in which the fastening of the door relative to the main door is locked.
- the subject of the present invention described above makes it possible to solve the various disadvantages identified in the state of the art presented in the preamble; the object of the present invention makes it possible in particular to combine, on a rolling mill, a "rickshaw" type system, appreciated for its robustness, and a gate, which is appreciated for securing maintenance operations and avoiding cylinder replacement time. too long, such a combination is not possible so far with the current configurations.
- FIGS. 4 to 8a-8b illustrate several non-restrictive embodiments thereof and in which:
- Figure 4 shows a schematic cross-sectional view of a rolling mill according to a first advantageous embodiment of the present invention
- Figures 5a-5b-5c each show a schematic perspective view of the front of a rolling mill according to Figure 4;
- Figures 6a-6b-6c each show a schematic perspective view of the front facade of a rolling mill according to a second advantageous embodiment of the present invention
- Figure 7 shows a schematic perspective view of a variant in which the main door is removable.
- Figures 8a-8b each show a schematic perspective view of the front facade of a rolling mill according to a third advantageous embodiment of the present invention.
- the mill 100 comprises a roll stand 10 in which are distributed a lower group Gi and an upper group Gs each composed of a working cylinder 12, two first intermediate cylinders 13 , three second intermediate cylinders 14 and 15, and four support rollers, or support rollers, which are outside the arrangement and which are denoted by A, B, C and D for the upper group Gs and E, F, G, H for the lower group Gi.
- the rolling mill 100 is equipped with a "rickshaw" system, such as that illustrated in FIG. 3, to set in motion the first intermediate cylinders 13.
- the rolling mill 100 is a rolling mill with twenty cylinders: it thus comprises two pairs of first intermediate cylinders 13.
- the rolling mill 100 comprises a "rickshaw" system which has a lateral displacement device 20 intermediate cylinders 13 consisting of an arrangement of two pairs of hydraulic cylinders at the front 21 and 2 and two pairs of hydraulic cylinders at the rear 22 and 22 '.
- the lateral displacement device 20 comprises two front double hydraulic cylinders 21-21 'and two double rear hydraulic cylinders 22-22' which are configured together to adjust the position of the first intermediate cylinders 13 using only a thrust force P on the bearing faces of the cylinder stops 13.
- each hydraulic cylinder 21-21 'and 22-22' respectively has a portion 21a-21a 'and 22a-22a' which is supported on one of the ends 13a-13b of the intermediate cylinders 13, and is configured to exert a thrust force P alternately on these ends 13a-13b to allow lateral displacement of the intermediate cylinders 13.
- the rolling mill 100 comprises a motorized main gate 30 which is on the front facade of the rolling mill 100 and which makes it possible to access all the rolls 12, 13, 14, 15 and A, B, C, D, E, F, G and H when this main door 30 is open.
- the rolling mill 100 has a gate 40 which, according to a first advantageous characteristic, is removable: it therefore has a closed position PF (illustrated in FIG. 5a) and an open position PO (illustrated in FIG. 5b); this open position PO allows access to the working cylinders 12 and the intermediate cylinders 13.
- the gate 40 closes the opening in the main door 30.
- the gate 40 integrates the front hydraulic cylinders 21-21 '.
- the gate 40 comprises a plate (preferably made of a rigid and resistant material) having in its central part an opening.
- the front hydraulic cylinders 21-21 ' are fixed on the gate on either side of this opening. More particularly, as illustrated in FIG. 4, in the closed position PF, the driving portion of the hydraulic cylinders 21-21 'lies outside the rolling mill cage 10 and the functional portion of the hydraulic cylinders 21-21' is located at the inside of the roll stand 10. This reduces the size of the cylinders 21-2, and prevents the opening of the gate is partial and / or is blocked by the roll stand.
- the gate 40 is retractable, and opens and closes conventionally as a door.
- the fixing means 41 comprise retraction means 42 such as hinges which are fixed directly or indirectly to the main door 30 ; these retraction means 42 protruding from the main door are positioned opposite the retraction means 31 of the main door 30.
- the retraction means 42 are positioned closer to the edge 30a of the main door 30 which is opposite the edge 30b on which are fixed the retraction means 31 of the main door 30.
- the gate 40 is positioned substantially in the center of the main door 30.
- the gate 40 comprises a pair of arms 44 extending radially to the edge 30a of the main door 30. These arms 44 thus form a pivot joint with the retraction means 42 for allow the opening and closing of the main door 30.
- the kinematics related to the opening and closing of the gate 41 is in mirror with the kinematics related to the opening and closing of the main door.
- the retraction means 42 of the gate consist of two hinges.
- the fixing means 41 further comprise a locking mechanism 43 coupled to the retraction means 42 and comprising a hook actuated by a lever to allow the locking of the door 40 in the closed position.
- the operator who wishes to open the gate 40 only has to unlock the mechanism 43 by operating the lever. Due to the configuration described above, the opening of the gate 40 is simple: the cylinders hydraulics 21-2 integrated in the gate 40 indeed allow an opening gate sufficient to allow full access to the cylinders 12 and / or 13.
- Figures 6a to 6c show an alternative to the embodiment of Figures 5a to 5c.
- the rolling mill 100 has characteristics in common with the embodiment of FIGS. 5a to 5c.
- the rolling mill according to these FIGS. 6a to 6c is a twenty-roll mill of the "Sendzimir" type which comprises in the same way:
- a main door 30 allowing access to all of these cylinders, and a removable gate 40 which, in the closed position, is fixed integrally to the main door 30 by fixing means 41.
- the fastening means 41 consist of a set of four fixing clamps 45 positioned at the four corners of the gate and configured in such a way that the gate 40 is able to be temporarily separated from the door main 30.
- the operator positions a carriage 50 close to the gate 40.
- the gate opens, it disengages the locks 45 to separate the door 40 from the main door 30.
- the carriage 50 has a pair of rails 51 on which, when the gate 40 is disengaged from the main door 30, the gate 40 can translate to a stop 52 to reach the open position PO.
- the operator can actuate the height adjustment means 53 to adjust the height of the conveyor belt 54 so as to allow the extraction of the working cylinders 12 and / or the cylinders intermediate 13 desired.
- the operator can easily carry out his maintenance operation on the rolls by removing these rolls from the roll stand.
- the extraction of these cylinders can be facilitated by a specially adapted clamp for this purpose and for extracting one or more cylinders by opening the gate.
- the carriage 50 can then move the carriage 50 to free space around the mill 100 to allow the opening of the main door 30.
- the carriage slides on rails embedded in the ground (not shown here).
- FIG. 7 represents an alternative embodiment in which, alternatively, the main door 30 is able to be temporarily disconnected from the roll stand 100.
- This variant can be adapted in particular to the second embodiment described above.
- the main door is fixed to the rolling mill cage 100 by fastening means allowing the temporary fixing of the main door with the roll stand.
- This variant is interesting to allow good access to all cylinders when the main door is in the open position as shown in Figure 7.
- the gate 40 has a width substantially smaller than the width of the main gate 30.
- the opening formed in the main door 30 which allows access to the cylinders 12 and 13 is wide; the gate 30 in the closed position PF covers this opening.
- the gate 40 has fastening means 41 'which are mounted directly on the roll stand 10.
- the gate 40 in the closed position PF is no longer fastened integrally to the main door 30, but to the roll stand 10, which in particular prevents the main door 30 from withstanding the stresses exerted by the weight of the gate 40.
- This mode can be combined with the previous mode.
- the main door 30 is sandwiched between the gate 40 and the cage 10 when the gate 40 is closed.
- This embodiment is particularly advantageous because it avoids the use of hydraulic means to ensure the closure of the main door.
- the rolling mill described according to the various embodiments above allows, by its different technical characteristics, structural and functional, to overcome the drawbacks identified in the state of the art.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Adjustment And Processing Of Grains (AREA)
- Power-Operated Mechanisms For Wings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1361171A FR3013242B1 (en) | 2013-11-15 | 2013-11-15 | MULTI-YELLOW ROLLER INCORPORATING A PORTILLON |
PCT/FR2014/052913 WO2015071608A1 (en) | 2013-11-15 | 2014-11-14 | Multiroll rolling mill incorporating a hatch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3068553A1 true EP3068553A1 (en) | 2016-09-21 |
EP3068553B1 EP3068553B1 (en) | 2018-03-28 |
Family
ID=49876909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14809930.2A Active EP3068553B1 (en) | 2013-11-15 | 2014-11-14 | Multiroll rolling mill incorporating a hatch |
Country Status (6)
Country | Link |
---|---|
US (1) | US10124379B2 (en) |
EP (1) | EP3068553B1 (en) |
CN (1) | CN105764622B (en) |
ES (1) | ES2674871T3 (en) |
FR (1) | FR3013242B1 (en) |
WO (1) | WO2015071608A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3056422B1 (en) * | 2016-09-27 | 2019-06-28 | Fives Dms | SPRAYING RAMP OF A LUBRICATING AND / OR REFRIGERATING FLUID |
CN108015110B (en) * | 2017-12-27 | 2024-04-09 | 中重科技(天津)股份有限公司 | Axial positioning device for intermediate roll system of twenty-high rolling mill |
CN114054503B (en) * | 2021-10-08 | 2023-04-28 | 中冶南方工程技术有限公司 | Multi-roller mill with multifunctional front door and operation method thereof |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5548413A (en) * | 1978-09-29 | 1980-04-07 | Hitachi Ltd | Rolling mill |
DE3221346C2 (en) * | 1982-06-05 | 1984-03-15 | Sundwiger Eisenhütte Maschinenfabrik Grah & Co, 5870 Hemer | Multi-high roll stand with flying, conical intermediate rolls |
DE3631171A1 (en) * | 1986-09-11 | 1988-03-24 | Mannesmann Ag | Multi-roller rolling mill with axially displaceable intermediate rolls |
US5193377A (en) | 1991-08-23 | 1993-03-16 | T. Sendzimir, Inc. | Crown adjustment systems on cluster mills |
US5471859A (en) * | 1992-07-20 | 1995-12-05 | T. Sendzimir, Inc. | Cluster mill crown adjustment system |
US6688151B2 (en) | 2000-03-27 | 2004-02-10 | Mitsubishi Heavy Industries, Ltd. | Device and method for shifting work roll of cluster mill |
CN102228904B (en) * | 2011-04-15 | 2013-11-20 | 天津冶金规划设计院 | Novel twenty-roller cold-rolling mill |
CN202984288U (en) * | 2012-11-19 | 2013-06-12 | 上海山弈冶金技术有限公司 | Driving device for motion of intermediate roller of twenty-high rolling machine |
CN202990682U (en) * | 2012-11-19 | 2013-06-12 | 上海山弈冶金技术有限公司 | Twenty-high rolling machine |
-
2013
- 2013-11-15 FR FR1361171A patent/FR3013242B1/en not_active Expired - Fee Related
-
2014
- 2014-11-14 CN CN201480062585.8A patent/CN105764622B/en active Active
- 2014-11-14 EP EP14809930.2A patent/EP3068553B1/en active Active
- 2014-11-14 US US15/035,343 patent/US10124379B2/en active Active
- 2014-11-14 WO PCT/FR2014/052913 patent/WO2015071608A1/en active Application Filing
- 2014-11-14 ES ES14809930.2T patent/ES2674871T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20160288179A1 (en) | 2016-10-06 |
EP3068553B1 (en) | 2018-03-28 |
FR3013242A1 (en) | 2015-05-22 |
WO2015071608A1 (en) | 2015-05-21 |
CN105764622A (en) | 2016-07-13 |
ES2674871T3 (en) | 2018-07-04 |
US10124379B2 (en) | 2018-11-13 |
FR3013242B1 (en) | 2016-05-06 |
CN105764622B (en) | 2019-04-02 |
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