EP4368306A1 - Deflector roll and method for manufacturing steel sheet using said deflector roll - Google Patents

Deflector roll and method for manufacturing steel sheet using said deflector roll Download PDF

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Publication number
EP4368306A1
EP4368306A1 EP22841833.1A EP22841833A EP4368306A1 EP 4368306 A1 EP4368306 A1 EP 4368306A1 EP 22841833 A EP22841833 A EP 22841833A EP 4368306 A1 EP4368306 A1 EP 4368306A1
Authority
EP
European Patent Office
Prior art keywords
roll
metal strip
main body
deflector roll
plate
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.)
Pending
Application number
EP22841833.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Shinichiro Aoe
Masashi Oka
Tetsuya Arakawa
Yukihiro Matsubara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP4368306A1 publication Critical patent/EP4368306A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
    • B21B41/08—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters without overall change in the general direction of movement of the work
    • B21B41/10—Loop deflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs

Definitions

  • the present invention relates to a deflector roll used to change the travelling direction of a metal strip being threaded by wrapping the metal strip on an outer surface of a roll, and to a method of producing a steel sheet using this deflector roll.
  • deflector rolls In a steel sheet continuous production facility, a large number of deflector rolls are installed on a threading route for the purpose of changing the travelling direction of a metal strip being threaded.
  • the significance of using deflector rolls lies in making the steel sheet continuous production facility compact and reducing the building cost of the facility.
  • the use of deflector rolls causes an undesirable effect that the metal strip meanders due to a frictional force generated between the metal strip and the deflector rolls.
  • a CPC meandering control device To prevent the meandering of a metal strip on a deflector roll, a CPC meandering control device has been hitherto commonly used. However, it has often been impossible to install a CPC meandering control device due to restrictions in terms of the cost, the installation place, etc. For example, in a horizontal looper device, it is difficult to install a CPC meandering control device in a deflector roll that is installed in a moving looper car for cost reasons as well as due to restrictions in terms of the space to dispose electrical components, etc.
  • a crown roll having a convex roll profile is used.
  • the crown roll can use a frictional force generated between itself and the metal strip as a centering force, and thus, if not as effective as a CPC meandering control device, can hinder the metal strip from meandering to some extent.
  • hot-rolled steel sheets produced in a hot rolling step which is an upstream step, are becoming more prone to shape defects and camber at a leading end part or a tail end part of a coil.
  • a situation is arising frequently where, when metal strips in which shape defects or camber has occurred are connected to each other and threaded, meandering at the joint cannot be hindered.
  • Another known method for reducing meandering of a metal strip on a deflector roll is to use a guide roll that comes into contact with the edges of the metal strip in the width direction.
  • the guide roll exerts a large colliding force to restrain meandering. This colliding force inevitably causes a defect such as the metal strip becoming chipped at the edge, and thus the method using a guide roll is not perfect.
  • Patent Literature 1 proposes a device in which a belt pulley is movable relative to the thrust direction
  • Patent Literature 2 proposes a device in which upper and lower rolls are movable relative to the thrust direction.
  • Patent Literature 1 there is a concern that when significant meandering of the belt occurs, movement of the belt pulley may cause an end portion of the belt to collide with a support part that supports the belt pulley.
  • damper resistance is applied to at least one of the upper roll and the lower roll, which puts a limit on reducing such a frictional force that guides meandering of the steel strip.
  • neither of these techniques is suitable for application to deflector rolls.
  • An object of the present invention is to propose a deflector roll that enables efficient production of a steel sheet while mitigating meandering of a metal strip due to a frictional force occurring in an axial direction of the roll, without involving structural complication, and a method of producing a steel sheet using this deflector roll.
  • the present invention is a deflector roll that changes a travelling direction of a metal strip being threaded, characterized in that: the deflector roll comprises a roll main body that is rotatably supported by a roll frame, and a sliding member that is provided so as to be movable relative to an outer surface of the roll main body; and the sliding member is configured to have the metal strip wrapped thereon and to be movable along an axial direction of the roll main body while maintaining that wrapped state.
  • the present invention is a method of producing a steel sheet using a deflector roll that produces a steel sheet by transferring a metal strip having undergone an upstream-side production process to a downstream-side production process so as to pass through a looper device in which at least one deflector roll having the above-described configuration is installed.
  • This method is characterized in that, while the metal strip is passing through the looper device, the sliding member of the deflector roll, along with the metal strip wrapped on the deflector roll, is moved along the axial direction of the roll main body using a frictional force attributable to meandering of the metal strip.
  • the sliding member provided on the outer surface of the roll main body is movable in the axial direction of the roll main body, generation of such a frictional force as to amplify the meandering of the metal strip is avoided.
  • the roll main body does not move in the axial direction, a problem such as coming into contact with the roll frame does not occur, either.
  • FIGs. 1 (a) to 1(c) are views schematically showing an embodiment of a deflector roll according to the present invention, with FIG. 1(a) being a plan view, FIG. 1(b) a front view, and FIG. 1(c) a side view.
  • FIG. 2 is a view showing section A-A of FIG. 1
  • FIG. 3 is a view showing section B-B of FIG. 1 .
  • reference sign 1 denotes a roll frame
  • reference sign 2 denotes a roll main body that is rotatably supported by the roll frame 1 through a bearing
  • reference sign 3 is a sliding member that is provided on an outer surface of the roll main body 2, and that has a metal strip S wrapped thereon and is movable along an axial direction of the roll main body 2 while maintaining that wrapped state.
  • the sliding member 3 can be composed of a plurality of plate-shaped bodies 3a of a rectangular shape that is arrayed over an entire circumference of the roll main body 2, with end surfaces 3a1 in a longitudinal direction located on the sides of roll end surface 2a of the roll main body 2 and end surfaces 3a2 in a width direction facing one another. Between the plate-shaped bodies 3a and the roll main body 2, linear guides 4 each formed by a combination of a plurality of rollers are provided such that the plate-shaped bodies 3a are held on the roll main body 2 so as to be unable to come off and that the plate-shaped bodies 3a are individually movable in the axial direction of the roll main body 2. While the sliding member 3 composed of the plurality of plate-shaped bodies 3a has been shown as an example, the sliding member 3 may be formed by a single member.
  • a member preferably used as the plate-shaped body 3a is, for example, a metal member, a wooden member, or a synthetic resin member (including rubber or the like) that has an arc surface e forming a part of a wrapping circumferential surface of a circular shape in a state where the plate-shaped bodies 3a are arrayed over the entire circumference of the roll main body 2, and that has a cross-sectional profile in which a central part 3a3 in the longitudinal direction protrudes outward relative to both end portions as shown in section C-C of FIG. 4 (b) .
  • Reference sign 5 in the drawings denotes a centering guide that is provided facing the end surfaces 3a1 of the plate-shaped bodies 3a in the longitudinal direction, in a region of the roll main body 2 except for a wrapping region of the metal strip S, and that is hit by the end surfaces 3a1 in the longitudinal direction of the plate-shaped bodies 3a in a moving state such that the plate-shaped bodies 3a are returned to their original positions.
  • the centering guide 5 allows the central parts 3a3 of the plate-shaped bodies 3a in the longitudinal direction to be centered to a threading center O of the metal strip S.
  • the wrapping region L of the metal strip S is denoted by L and the region except for that region L is denoted by L1
  • the wrapping region L of the metal strip S and the region L1 except for the region L refer to the regions shown in FIG. 5 .
  • a member including a base 5a that has a crescent-shaped side surface and is fixed and held on the roll frame 1, and a pair of left and right guide plates 5b that are supported at one end on upper and lower leading end portions of the base 5a can be used.
  • the guide plate 5b is provided with a guide surface g of which a free end 5b 1 is farthest away from the roll end surface 2a of the roll main body 2, and to which the distance from the roll end surface 2a of the roll main body 2 decreases gradually toward a fixed end 5b2.
  • the case has been shown as an example in which two pairs of guide plates 5b are provided at the upper and lower leading ends of the base 5a such that the plate-shaped bodies 3a having moved can be reliably centered also when the roll main body 2 rotates in the reverse direction.
  • the shape of the side surface and the arrangement of the centering guide 5 can be changed as appropriate and are not limited to those shown in the drawings.
  • reference sign 6 in the drawings denotes guide rolls that are provided on the roll frame 1 and respectively located on both sides of the metal strip S to prevent the metal strip S from rolling out while being threaded.
  • a non-driven roller supported at one end that rotates by coming into contact with the metal strip S can be used.
  • the end surfaces 3a1 in the longitudinal direction hit the guide plates 5b of the centering guide 5 and are guided along the guide surfaces g, so that the plate-shaped bodies 3a having moved in the axial direction of the roll main body 2 are returned to their original positions and centered to the threading center O of the metal strip S.
  • the colliding force is only a colliding force attributable to a shearing force of the metal strip S and therefore its magnitude is significantly reduced.
  • the deflector roll according to the present invention does not require electrical components and control means, and it is relatively easy to replace an existing deflector roll with this deflector roll. Thus, there is an advantage in that the cost of conversion can be reduced.
  • the movement of the plate-shaped bodies 3a may be controlled by means of an actuator or the like that uses pneumatic pressure or hydraulic pressure, and in that case, the centering guide 5 is omitted.
  • FIG. 6 is a view schematically showing a schematic overall view of a horizontal looper device to which the deflector roll according to the present invention is suitably applied.
  • a looper device is generally a device that functions to temporarily store a metal strip S in the process of being transferred so as to maintain a constant transfer speed of the metal strip S in a downstream-side production process.
  • Reference sign 7 in FIG. 6 denotes a deflector roll provided on a most upstream side in a line
  • reference signs 8 and 9 denote steering rolls.
  • the steering rolls 8, 9 are rolls that function also as deflectors and are equipped with a CPC meandering control device (the rolls do not move), and can sense the position (an amount of meandering) of the metal strip S relative to the roll and tilt a rotational axis of the roll such that this amount of meandering of the metal strip S becomes zero, i.e., the center of the metal strip S in the width direction passes through the threading center O.
  • Reference signs 10 and 11 in FIG. 6 denote looper cars including a deflector roll.
  • the looper cars 10, 11 are moved in the left-right direction of the drawing along a track to thereby change the length of the metal strip S in a threading line as appropriate.
  • Reference sign 12 in FIG. 6 denotes support rolls that support the metal strip S at a 2.5 m pitch, for example.
  • Reference sign 13 denotes separator rolls that function to support the metal strip S as well as to open and close when the looper cars 10, 11 pass. The separator rolls 13 are disposed at about 15 m intervals, for example.
  • FIG. 7 shows a result of simulating how a metal strip S meanders when threaded under the following conditions: the metal strip S had a sheet width of 1250 mm and a sheet thickness of 2.2 mm; the line speed was 60 mpm; the tensile force was 0.51 kgf/mm 2 ; the coefficient of friction was 0.3; the length from the steering roll 8 to the looper car 10 and the length from the looper car 10 to the steering roll 9 were both 30 m; and a shape defect portion started to flow 50 seconds after the start of calculation.
  • FIG. 8 is a graph modeling the shape defect of the metal strip S in this simulation by a camber curvature.
  • the solid line represents the amount of meandering of the metal strip S on the steering roll 8; the dotted line represents the amount of meandering of the metal strip S on the deflector roll of the looper car 10; and the dashed-dotted line represents the amount of meandering of the metal strip S on the steering roll 9.
  • FIG. 9 is a graph showing a result of simulating an amount of meandering of a metal strip S on the steering rolls 8, 9 and the looper car 10 in a case where the guide rolls 6 were installed in the support rolls 12 and the separator rolls 13 to hinder roll-out of the metal strip S due to meandering.
  • FIG. 10 is a graph modeling the shape defect of the metal strip S in this simulation by a camber curvature.
  • the solid line represents the amount of meandering of the metal strip S on the steering roll 8; the dotted line represents the amount of meandering of the metal strip S on the looper car 10; and the dashed-dotted line represents the amount of meandering of the metal strip S on the steering roll 9.
  • FIG. 12 is a graph showing a result of simulating an amount of meandering of a metal strip S in a case where the metal strip S was threaded with the deflector roll installed in the looper car 10 changed to the deflector roll according to the present invention.
  • FIG. 13 is a graph modeling the shape defect of the metal strip S in this simulation by a camber curvature.
  • FIG. 14 is a graph showing a colliding force occurring between the metal strip S and the guide rolls 6.
  • the solid line represents the amount of meandering of the metal strip S on the steering roll 8; the dotted line represents the amount of meandering of the metal strip S on the looper car 10; and the dashed-dotted line represents the amount of meandering of the metal strip S on the steering roll 9.
  • meandering of the metal strip S on the looper car 10 is about 0.15 m, which is far below the allowable range of ⁇ 0.175 m.
  • FIG. 14 it is clear that the colliding force occurring between the metal strip S and the guide rolls 6 is also substantially reduced compared with that in the conventional deflector roll.
  • the metal strip S is restricted from meandering significantly, so that the section where the transfer speed of the metal strip S is set to 50 mpm or lower can be shortened to about 30 m at the longest. As a result, efficient production of steel sheets becomes possible.
  • FIG. 16 is a view showing a facility in which a looper device is installed on each of an entry side of an annealing treatment step and a delivery side of a pickling treatment step. Such a facility is sometimes provided between the hot rolling step and the cold rolling step of the steel sheet production facility shown in FIG. 15 described above, and the deflector roll according to the present invention is also applicable to the looper device shown in FIG. 16 .
  • FIG. 17 is a view showing further another embodiment of the deflector roll according to the present invention in cross-section of a main part.
  • the plate-shaped bodies 3a of the sliding member 3 are each composed of an outer member 3b having an arc surface e and an inner member 3c placed on a lower surface of the outer member 3b so as to define and form an installation space of an elastic member 14 between the outer member 3b and the inner member 3c.
  • One end of the elastic member 14 disposed inside the installation space is coupled to an inner end of the outer member 3b, while the other end of the elastic member 14 is coupled to a protruding portion 2b provided at a body central part of the roll main body 2, such that the plate-shaped body 3a is elastically supported by the elastic member 14 so as to be movable along the axial direction of the roll main body 2 within the range of a notch 3d formed in the inner member 3c.
  • this deflector roll is provided with the linear guide 4 formed by a combination of a plurality of rollers between the inner member 3c of the plate-shaped body 3a and the roll main body 2. (In FIG. 17 , the linear guide 4 is not shown.)
  • the plate-shaped bodies 3a can be moved along the axial direction of the roll main body 2 as shown in FIGs. 18 (a) and 18(b) to thereby restrict the metal strip S from meandering more significantly.
  • the plate-shaped bodies 3a are returned to their original positions and centered by the urging force of the elastic member 14 such that the central parts 3a3 of the plate-shaped bodies 3a in the longitudinal direction and the threading center O of the metal strip S coincide with each other.
  • a deflector roll has the advantage of having a simple structure.
  • the metal strip S meandered between the looper car 10 and the steering roll 8 and came into contact with the guide rolls, but the metal strip S did not become chipped at the edge therebetween.
  • the guide rolls directly upstream of the looper car 10 collided hard with the metal strip S, causing a problem of the metal strip S becoming chipped at the edge.
  • the device including the deflector roll according to the present invention even when the metal strip S meandered significantly on the looper car 10 and the edge of the metal strip S came into contact with the guide rolls, a problem such as the metal strip S becoming chipped at the edge did not occur, and it was confirmed that the colliding force in this case was at a level equivalent to that of a colliding force that does not cause chipping of the edge of the metal strip S.
  • a non-oriented magnetic steel sheet was produced by performing hot rolling of rolling a 215 mm-thick slab to a finished sheet thickness of 2 mm and a finished sheet width of 1289 mm, and cold rolling of threading the sheet with a sheet thickness of 2 mm and a sheet width of 1280 mm through the looper device and further rolling the sheet to an entry-side sheet thickness of 2 mm, a finished sheet thickness of 0.245 mm, and a finished sheet width of 1289 mm.
  • the obtained non-oriented magnetic steel sheet was examined as to the state of occurrence of chipping of the edge.
  • the present invention can provide a deflector roll on which a metal strip can be threaded without significant meandering and which enables efficient production of a steel sheet, and a method of producing a steel sheet using this deflector roll.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP22841833.1A 2021-07-12 2022-06-02 Deflector roll and method for manufacturing steel sheet using said deflector roll Pending EP4368306A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021114785 2021-07-12
PCT/JP2022/022443 WO2023286486A1 (ja) 2021-07-12 2022-06-02 デフレクターロール及びそのデフレクターロールを用いた鋼板の製造方法

Publications (1)

Publication Number Publication Date
EP4368306A1 true EP4368306A1 (en) 2024-05-15

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ID=84919301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22841833.1A Pending EP4368306A1 (en) 2021-07-12 2022-06-02 Deflector roll and method for manufacturing steel sheet using said deflector roll

Country Status (5)

Country Link
EP (1) EP4368306A1 (ko)
JP (1) JP7332995B2 (ko)
KR (1) KR20240027039A (ko)
CN (1) CN117615862A (ko)
WO (1) WO2023286486A1 (ko)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559549Y2 (ko) * 1976-03-18 1980-03-01
JPS61176417A (ja) * 1985-01-31 1986-08-08 Mitsubishi Heavy Ind Ltd 移送用ロ−ラ
JPH0234496Y2 (ko) * 1986-03-20 1990-09-17
JPH07227605A (ja) * 1994-02-22 1995-08-29 Ube Ind Ltd スリーブロール
JP3815953B2 (ja) 2000-06-27 2006-08-30 中村物産株式会社 ベルトコンベヤ
JP5396931B2 (ja) 2009-03-11 2014-01-22 Ｊｆｅスチール株式会社 金属帯の巻き取り方法および巻き取り設備

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Publication number Publication date
JP7332995B2 (ja) 2023-08-24
KR20240027039A (ko) 2024-02-29
JPWO2023286486A1 (ko) 2023-01-19
CN117615862A (zh) 2024-02-27
WO2023286486A1 (ja) 2023-01-19

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