EP2815817A1 - Niveleuse à cylindres et procédé pour le dressage de matériau en feuille - Google Patents

Niveleuse à cylindres et procédé pour le dressage de matériau en feuille Download PDF

Info

Publication number
EP2815817A1
EP2815817A1 EP13749297.1A EP13749297A EP2815817A1 EP 2815817 A1 EP2815817 A1 EP 2815817A1 EP 13749297 A EP13749297 A EP 13749297A EP 2815817 A1 EP2815817 A1 EP 2815817A1
Authority
EP
European Patent Office
Prior art keywords
sheet material
leveling
roll
pressing amount
catch
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Withdrawn
Application number
EP13749297.1A
Other languages
German (de)
English (en)
Other versions
EP2815817A4 (fr
Inventor
Keizo Abe
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.)
JP Steel Plantech Co
Original Assignee
JP Steel Plantech Co
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 JP Steel Plantech Co filed Critical JP Steel Plantech Co
Publication of EP2815817A1 publication Critical patent/EP2815817A1/fr
Publication of EP2815817A4 publication Critical patent/EP2815817A4/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • 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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by 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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/06—Removing local distortions

Definitions

  • the present invention relates to a roller leveler for flattening metal sheet material, such as steel sheet material, and a sheet-material flattening method.
  • the sheet material is subjected to rolling and cooling steps, in which the sheet material undergoes deformation, such as warping and/or waving. Accordingly, in order to remedy the deformation, such as warping and/or waving, and thereby to flatten the sheet material, a roller leveler including a plurality of leveling rolls disposed on upper and lower sides in a staggered manner, is used (Patent Document 1, for example).
  • the roller leveler passes sheet material to be flattened, with the upper leveling rolls being caused to penetrate between the lower leveling rolls or the lower leveling rolls being caused to penetrate between the upper leveling rolls, to repeatedly bend the sheet material, and thereby to planarize the warping and/or waving of the sheet material.
  • the roll pitch of the leveling rolls is determined from the maximum requirement yield stress and the corresponding maximum requirement sheet-material thickness of the sheet material to be flattened.
  • the maximum flattening force (pressing force) and the maximum torque are determined from the determined roll pitch.
  • the diameter of the leveling rolls is set as large as possible, that is, set equal to or greater than 0.9 times of the roll pitch and smaller than the roll pitch, in order to make it sufficiently easy to pass the sheet material and to transmit sufficient torque.
  • the maximum requirement yield stress and the maximum requirement sheet-material thickness mean the maximum values of the yield stress and the sheet-material thickness that are required as specifications of the sheet material by a user.
  • JP 2009-255148 A Japanese Patent Application Publication No. 2009-255148 ( JP 2009-255148 A )
  • the present invention has been made under such circumstances and an object of the present invention is to provide a roller leveler and a sheet-material flattening method, with which it is possible to perform leveling or flattening of metal sheet material, such as steel sheet material, that is thin and has a high yield stress.
  • a first aspect of the present invention provides a roller leveler for flattening sheet material by passing the sheet material through a pass line
  • the roller leveler including: a leveling roll unit that has a plurality of leveling rolls arranged on upper and lower sides of the pass line in a staggered manner and configured to rotate so as to pass the sheet material while flattening the sheet material interposed therebetween; a pushing cylinder configured to press the sheet material via the leveling rolls and provided on each of an entrance side and a discharge side of the leveling roll unit, on which the sheet material enters and is discharged into and from the leveling roll unit, respectively; a plurality of backup rolls that back up the leveling rolls; and a driving mechanism configured to rotate the leveling rolls to pass the sheet material, wherein the plurality of leveling rolls are designed so that a diameter D thereof satisfies a relation, 0.5 ⁇ D/P ⁇ 0.9, in relation to a roll pitch P of the leveling rolls that is determined from a maximum requirement yield stress and a
  • the roller leveler further include a control unit that is configured to control an amount of pressing of the sheet material performed by the pushing cylinder so that the sheet material is caught between the upper and lower leveling rolls of the leveling roll unit, wherein the control unit has a catch correction table, in which a catch limit pressing amount and a catch correction control distance depending on thickness of the sheet material are entered, the catch limit pressing amount being a pressing amount, at or under which the sheet material is caught between the upper and lower leveling rolls of the leveling roll unit, the catch correction control distance being an amount of travel of a leading edge of the sheet material, at which the pressing amount should be brought to the catch limit pressing amount, and the control unit be configured so that when a specified pressing amount, required to flatten the sheet material, of the pushing cylinder on the entrance side is greater than the catch limit pressing amount, the control unit performs control based on the catch correction table so that the pressing amount of the pushing cylinder on the entrance side is limited to the catch limit pressing amount until the leading edge of the sheet material reaches
  • pressing speed at which the pressing amount of the pushing cylinder on the entrance side is brought to the specified pressing amount when the leading edge of the sheet material reaches the catch correction control distance, be entered in the catch correction table, and the control unit control the pressing speed, at which the pressing amount of the pushing cylinder on the entrance side is changed from the catch limit pressing amount to the specified pressing amount, based on the catch correction table.
  • a second aspect of the present invention provides a roller leveler for flattening sheet material by passing the sheet material through a pass line
  • the roller leveler including: a leveling roll unit that has a plurality of leveling rolls arranged on upper and lower sides of the pass line in a staggered manner and configured to rotate so as to pass the sheet material while flattening the sheet material interposed therebetween; a plurality of backup rolls that back up the plurality of leveling rolls from upper and lower sides; a pair of roll frames that support the leveling rolls and the backup rolls from upper and lower sides; a pair of frames that support the pair of roll frames from upper and lower sides; a pushing cylinder provided on each of an entrance side and a discharge side, at which the sheet material enters and is discharged into and from the leveling roll unit, respectively, and configured to push a working frame, which is one of the pair of frames, toward the pass line so as to press the sheet material between the leveling rolls via a corresponding one of the pair of roll frames; a driving mechanism configured to rotate the leveling
  • the control unit calculate a required amount of tightening of each of the hydraulic crowning cylinders that is required to compensate for the compressive deformation and perform the tightening control of each of the hydraulic crowning cylinders based on a total value obtained by summing both this required amount of tightening and the required amount of tightening that is required to compensate for the amounts of lateral deflection of the pair of frames.
  • the control unit have a catch correction table, in which a catch limit pressing amount and a catch correction control distance depending on thickness of the sheet material are entered, the catch limit pressing amount being a pressing amount, at or under which the sheet material is caught between the upper and lower leveling rolls of the leveling roll unit, the catch correction control distance being an amount of travel of a leading edge of the sheet material, at which the pressing amount should be brought to the catch limit pressing amount, and the control unit be configured so that when a specified pressing amount, required to flatten the sheet material, of the pushing cylinder on the entrance side is greater than the catch limit pressing amount, the control unit performs control based on the catch correction table so that the pressing amount of the pushing cylinder on the entrance side is limited to the catch limit pressing amount until the leading edge of the sheet material reaches the catch correction control distance and, when the leading edge of the sheet material reaches the catch correction control distance, the pressing amount of the pushing cylinder on the entrance side is brought to the specified pressing amount.
  • pressing speed at which the pressing amount of the pushing cylinder on the entrance side is brought to the specified pressing amount when the leading edge of the sheet material reaches the catch correction control distance, be entered in the catch correction table, and the control unit control the pressing speed, at which the pressing amount of the pushing cylinder on the entrance side is changed from the catch limit pressing amount to the specified pressing amount, based on the catch correction table.
  • the diameter D and the pitch P satisfy a relation, 0.55 ⁇ D/P ⁇ 0.8.
  • the driving mechanism include: an upper leveling roll-driving section that has upper leveling roll-driving motors for driving the upper leveling rolls and upper leveling roll power-transmitting part for transmitting power of the upper leveling roll-driving motors to the upper leveling rolls; and a lower leveling roll-driving section that has lower leveling roll-driving motors for driving the lower leveling rolls and lower leveling roll power-transmitting part for transmitting power of the lower leveling roll-driving motors to the lower leveling rolls, wherein the upper leveling roll power-transmitting part and the lower leveling roll power-transmitting part are disposed so as not to interfere with each other.
  • a third aspect of the present invention provides a sheet-material flattening method of flattening sheet material via a roller leveler for flattening the sheet material by passing the sheet material through a pass line
  • the roller leveler includes: a leveling roll unit that has a plurality of leveling rolls arranged on upper and lower sides of the pass line in a staggered manner and configured to rotate so as to pass the sheet material while flattening the sheet material interposed therebetween; a pushing cylinder configured to press the sheet material via the leveling rolls and provided on each of an entrance side and a discharge side of the leveling roll unit, on which the sheet material enters and is discharged into and from the leveling roll unit, respectively; a plurality of backup rolls that back up the leveling rolls; and a driving mechanism configured to rotate the leveling rolls to pass the sheet material, the method including: determining a roll pitch P of the plurality of leveling rolls from a maximum requirement yield stress and a maximum requirement sheet-material thickness of the sheet material to be flattened; and setting a value of diameter
  • a fourth aspect of the present invention provides a sheet-material flattening method of flattening sheet material via a roller leveler for flattening the sheet material by passing the sheet material through a pass line
  • the roller leveler includes: a leveling roll unit that has a plurality of leveling rolls arranged on upper and lower sides of the pass line in a staggered manner and configured to rotate so as to pass the sheet material while flattening the sheet material interposed therebetween; a plurality of backup rolls that back up the plurality of leveling rolls from upper and lower sides; a pair of roll frames that support the leveling rolls and the backup rolls from upper and lower sides; a pair of frames that support the pair of roll frames from upper and lower sides; a pushing cylinder provided on each of an entrance side and a discharge side, at which the sheet material enters and is discharged into and from the leveling roll unit, respectively, and configured to push a working frame, which is one of the pair of frames, toward the pass line so as to press the sheet material between the leveling rolls via a corresponding one
  • the method further include: based on information on compressive deformation of the pushing cylinders, the hydraulic crowning cylinders, the pair of roll frames, the backup rolls, and the leveling rolls, calculating a required amount of tightening of each of the hydraulic crowning cylinders that is required to compensate for the compressive deformation; and controlling tightening of each of the hydraulic crowning cylinders based on a total value obtained by summing both this required amount of tightening and the required amount of tightening that is required to compensate for the amounts of lateral deflection of the pair of frames.
  • the catch limit pressing amount being a pressing amount, at or under which the sheet material is caught between the upper and lower leveling rolls of the leveling roll unit, the catch correction control distance being an amount of travel of a leading edge of the sheet material, at which the pressing amount should be brought to the catch limit pressing amount, the following be further performed: limiting the pressing amount of the pushing cylinder on the entrance side to the catch limit pressing amount until the leading edge of the sheet material reaches the catch correction control distance when a specified pressing amount, required to flatten the sheet material, of the pushing cylinder on the entrance side is greater than the catch limit pressing amount; and bringing the pressing amount of the pushing cylinder on the entrance side to the specified pressing amount when the leading edge of the sheet material reaches the catch correction control distance.
  • the method further include: entering into the catch correction table pressing speed, at which the pressing amount of the pushing cylinder on the entrance side is brought to the specified pressing amount when the leading edge of the sheet material reaches the catch correction control distance; and controlling the pressing speed, at which the pressing amount of the pushing cylinder on the entrance side is changed from the catch limit pressing amount to the specified pressing amount, based on the catch correction table.
  • the value of the diameter D of the plurality of leveling rolls is set so as to satisfy the relation, 0.5 ⁇ D/P ⁇ 0.9, in relation to the roll pitch P of the leveling rolls that is determined from the maximum requirement yield stress and the corresponding maximum requirement sheet-material thickness of the sheet material to be flattened. For this reason, it is possible to strongly bend the sheet material by increasing the pressing amount. Consequently, it is made possible to perform leveling or flattening of sheet material that is thin and has a high yield stress and a higher degree of flatness is achieved.
  • FIG. 1 is a side view of a roller leveler according to an embodiment of the present invention
  • FIG. 2 is a front view thereof.
  • the roller leveler 100 of the present embodiment includes a housing 1, an upper frame 2 provided inside the housing 1, and a lower frame 3 provided so as to support the housing 1.
  • An upper roll frame 5 is hung under the upper frame 2 via upper roll gripping cylinders (not shown).
  • a lower roll frame 10 is provided above the lower frame 3.
  • the upper frame 2 is vertically pushed and moved with the use of pushing cylinders (also referred to as "pressing cylinders") as described later and therefore, the upper frame 2 can be called "working frame".
  • the working frame is not limited to the upper frame 2.
  • a configuration may be adopted, in which the lower frame 3 is configured as the working frame and the lower frame 3 is vertically pushed and moved with the use of pushing cylinders provided under the lower frame 3.
  • a leveling roll unit 20 including a plurality of upper leveling rolls 6 and a plurality of lower leveling rolls 8 that are arranged on upper and lower sides in a staggered manner so as to form a pass line of sheet material S, which is metal sheet material, such as steel sheet material, between the upper and lower leveling rolls 6 and 8.
  • sheet material S which is metal sheet material, such as steel sheet material
  • Guide rolls 14 for guiding the sheet material S are provided on the upstream side and the downstream side of the leveling roll unit 20 with respect to the transfer direction, in which the sheet material S is transferred.
  • the upper leveling rolls 6 and the lower leveling rolls 8 are configured to be rotated by a driving mechanism 15 and can perform leveling operation while passing the sheet material S in one of the direction indicated by an arrow A and the direction indicated by an arrow B in FIG. 1 , for example.
  • a plurality of short-length upper backup rolls 7 for backing up the upper leveling rolls 6 are arranged along the axial direction of the upper leveling rolls 6 above the upper leveling rolls 6 so as to be supported by the upper roll frame 5.
  • a plurality of short-length lower backup rolls 9 for backing up the lower leveling rolls 8 are arranged along the axial direction of the lower leveling rolls 8 below the lower leveling rolls 8 so as to be supported by the lower roll frame 10.
  • the roll pitch of both the upper and lower leveling rolls 6 and 8 is determined from the maximum requirement yield stress and the corresponding maximum requirement sheet-material thickness of the sheet material S to be flattened (the maximum value of the yield stress and the maximum value of the sheet-material thickness required in the specifications of the sheet material by a user). This is because leveling force required of the roller leveler 100 is calculated using the following equation (1) from the sheet-material thickness and the yield stress required by the user.
  • F 2 x 3 - 1 - ⁇ 2 x W x ⁇ y x T 2 / 3000 x L x ⁇
  • F leveling force
  • ⁇ plastification ratio
  • W sheet-material width (mm)
  • ⁇ y yield stress (kgf/mm 2 )
  • T sheet-material thickness (mm)
  • L roll pitch (mm)
  • ⁇ a coefficient obtained by actual measurement.
  • the leveling force is proportional to the yield stress ⁇ y, proportional to the square of the sheet-material thickness T, and inversely proportional to the roll pitch L.
  • F K 1 x T 2 x ⁇ y / L, where K 1 is a coefficient.
  • the leveling force achieved by the roller leveler increases as the diameter of the backup rolls (corresponding to the upper and lower backup rolls 7 and 9) disposed outside the leveling rolls increases.
  • the maximum diameter of the backup rolls is almost equal to the roll pitch L because it is impossible for the backup rolls to have a diameter greater than the roll pitch L.
  • Equation (2) K 1 x T 2 x ⁇ y / L, from which the following equation (4) is derived.
  • the equation (4) indicates that the roll pitch L of both the upper and lower leveling rolls 6 and 8 is determined from the yield stress ⁇ y and the sheet-material thickness T of the sheet material S to be flattened.
  • L K 1 ⁇ x T 2 x ⁇ y / K 2 1 / 2
  • the diameter of the leveling rolls is set as large as possible, that is, set equal to or greater than 0.9 times of the roll pitch and smaller than the roll pitch.
  • the roll pitch P (corresponding to the pitch L in the equation (4)) and the roll diameter D of both the upper and lower leveling rolls 6 and 8 are arranged so as to satisfy the relation, 0.5 ⁇ D/P ⁇ 0.9.
  • the roll diameter D is set smaller than the conventional range, 0.9 ⁇ D/P ⁇ 1.0.
  • the value of D/P is preferably within a range, 0.55 ⁇ D/P ⁇ 0.8, and is more preferably within a range, 0.6 ⁇ D/P ⁇ 0.7.
  • Pressing cylinders (also referred to as “pushing cylinders”) 4a and 4b for applying pressing force (also referred to as “pushing force”) to flatten the sheet material S are arranged at end portions of the leveling roll unit 20 in the transfer direction of the sheet material S, between the housing 1 and the upper frame 2.
  • the pressing cylinders 4a and 4b, each including two cylinders, are provided at two ends (driving side and working side) in the width direction of the sheet material S (see FIG. 2 , in which, however, only the pressing cylinders 4a are shown).
  • the term “press” is intended to include not only a case where the pressure is applied downward as shown in FIG. 1 but also a case where the pressure is applied upward as explained later in a modification.
  • the term “press” can be replaced with the term “push” in this specification.
  • the pressing cylinders 4a and 4b are configured to press down the sheet material S via the upper roll frame 5, the upper backup rolls 7, and the upper leveling rolls 6 toward the lower leveling rolls 8 provided on the lower roll frame 10 in a stationary manner.
  • the upper leveling rolls 6 and the lower leveling rolls 8 are configured to be rotated by the driving mechanism 15.
  • the driving mechanism 15 is illustrated as if the driving mechanism 15 is connected to the whole of each of the rows of the upper and lower leveling rolls 6 and 8 for the sake of convenience. In actuality, however, the driving mechanism 15 is configured to individually rotate the upper leveling rolls 6 and the lower leveling rolls 8 as described later.
  • the sheet material S is passed between the upper leveling rolls 6 and the lower leveling rolls 8 with the use of the driving mechanism 15 and is pressed down by the pressing cylinders 4a and 4b via the upper leveling rolls 6 to level or flatten the sheet material S.
  • the pressing cylinder 4a functions as the entrance-side pressing cylinder and the pressing cylinder 4b functions as the discharge-side pressing cylinder.
  • the pressing cylinder 4b functions as the entrance-side pressing cylinder and the pressing cylinder 4a functions as the discharge-side pressing cylinder.
  • the upper leveling rolls 6 may be provided in a stationary manner and the lower leveling roll 8 may be pressed by the pressing cylinders.
  • the driving mechanism 15 includes: an upper leveling roll-driving section 30 having a driving motor 32 and a universal spindle 31 serving as a power-transmitting part connected to a protruding portion 6a of the shaft of each of the upper leveling rolls 6; and a lower leveling roll-driving section 40 having a driving motor 42 and a universal spindle 41 serving as a power-transmitting part connected to a protruding portion 8a of the shaft of each of the lower leveling rolls 8.
  • the universal spindles 31 and 41 each transmit power to a portion that is not coaxial with the driving side.
  • the universal spindle 31 has a pair of cross-pin units 33 and 34 and an intermediate shaft 35 interposed therebetween.
  • the universal spindle 41 has a pair of cross-pin units 43 and 44 and an intermediate shaft 45 interposed therebetween.
  • the shaft of the motor 32 and the cross-pin unit 34 on the motor 32-side are connected via a shaft 32a.
  • the shaft of the motor 42 and the cross-pin unit 44 on the motor 42-side are connected via a shaft 42a.
  • the universal spindles 31 and 41 are arranged so as not to interfere with each other in order to avoid the situation where the universal spindles 31 and 41 of the upper leveling roll 6 and the lower leveling roll 8 that are next to each other interfere with each other, the universal spindles 31 and 41 serving as power-transmitting parts of the upper leveling roll 6 and the lower leveling roll 8.
  • the length of the protruding portion 6a of the upper leveling roll 6 and the length of the protruding portion 8a of the lower leveling roll 8 are set different from each other so that the cross-pin units 33 and 43 are staggered.
  • a plurality of hydraulic crowning cylinders 12 are coupled to the upper frame 2 and the upper roll frame 5 between these frames, lined up in the sheet-material-width direction. As shown in FIG. 2 , the crowning cylinders 12 are installed with even pitches so as to correspond to the upper leveling rolls 6 and the lower leveling rolls 8 along the width direction perpendicular to the direction, in which the sheet material S is passed.
  • the hydraulic crowning cylinders 12 are installed in two rows as shown in FIG. 1 .
  • the number of rows of the crowning cylinders may be one or may be three or more.
  • each of the hydraulic crowning cylinders 12 has a cylinder body 51 and a piston 52.
  • the upper end of the piston 52 is coupled to the upper frame 2 via a spherical coupling member 53 and the bottom of the cylinder body 51 is coupled to the upper roll frame 5 via a slide coupling 54.
  • a position sensor 55 is built in each of the hydraulic crowning cylinders 12.
  • Each of the hydraulic crowning cylinders 12 is configured to be telescoped hydraulically and is connected to an oil feed line 56 for feeding oil to an extending-side oil chamber (now shown) for extending operation and to a release line 57 for releasing the hydraulic pressure.
  • a pressure sensor 58 for detecting the hydraulic pressure in the extending-side oil chamber and a control valve 59 for controlling the amount of oil to be fed are connected to the oil feed line 56.
  • a servo valve or a proportional control valve is used as the control valve 59.
  • deflection-detecting sensors 21 for detecting the lateral deflection of the upper frame 2 are provided at central positions with respect to the lateral direction, above the upper frame 2.
  • two deflection-detecting sensors 21 are provided along the pass line of the sheet material S.
  • the deflection-detecting sensors 21 continuously detect the distances to the bottom portion of the upper frame 2, based on which distances the amount of deflection of the upper frame 2 is calculated.
  • Deflection-detecting sensors 22 are installed in the inner space in the lower frame 3.
  • two deflection-detecting sensors 22 are provided along the pass line of the sheet material S at central positions with respect to the lateral direction.
  • the deflection-detecting sensors 22 continuously detect the distances to the ceiling portion of the lower frame 3, based on which distances the amount of deflection of the lower frame 3 is calculated.
  • a configuration may be adopted, in which one of the upper and lower frames 2 and 3 is provided with deflection-detecting sensors and the amount of deflection of the other frame is determined with the use of proportion.
  • a load cell (or hydraulic pressure converter) 23 is installed between the housing 1 and each of the pressing cylinders 4a and 4b. By doing so, it is made possible to detect the compressive deformation of the pressing cylinders 4a and 4b, the hydraulic crowning cylinders 12, the upper roll frame 5, the upper backup rolls 7, the upper leveling rolls 6, the lower leveling rolls 8, the lower backup rolls 9, and the lower roll frame 10.
  • the roller leveler 100 of this embodiment is configured so that components of the roller leveler 100 are controlled by a control unit 60.
  • the control unit 60 includes a process controller having a central processing unit (CPU).
  • the control unit 60 further includes a user interface, such as a keyboard and a display, and a memory, in which recipes containing, for example, processing condition data and control programs (software) are stored, the user interface and the memory being connected to the CPU.
  • a selected recipe is called from the memory in accordance with the instructions from the user interface, for example, and is executed by the process controller. In this way, desired processes (a sequence of operations) are performed by the roller leveler 100 under the control of the process controller.
  • the recipes, containing control programs, processing condition data, etc., that are stored in a computer-readable storage medium can be used.
  • a computer-readable storage medium such as a magnetic disk (flexible disk, hard disk, etc.), an optical disk (CD, DVD, etc.), a magneto-optical disk (MO etc.), and a semiconductor memory
  • the recipes that are transmitted from another device via a dedicated line, for example, as needed may be used online.
  • the control unit 60 is configured to control the driving mechanism 15 and the amounts of penetration of the leveling rolls 6 and 8 by the pressing cylinders 4a and 4b for the purpose of flattening (leveling) of the sheet material S according to the control programs stored in a computer-readable storage medium. Moreover, the control unit 60 is configured to perform the lateral deflection compensation and the compression compensation of the frames by controlling the tightening of the hydraulic crowning cylinders 12. Furthermore, the control unit 60 is configured to perform pressing control, correction control for catching in particular, of the pressing cylinders 4a and 4b.
  • FIG. 6 shows a block diagram of control performed by the control unit 60. Crowning control, pressing control, and correction control for catching will mainly be described hereinafter.
  • the control unit 60 includes an upper controller 62, a crowning controller 64, and a pressing-and-catching controller 66, each having a microprocessor.
  • the upper controller 62 is configured to control the entire system of the roller leveler 100.
  • the crowning controller 64 is configured to control operation of the hydraulic crowning cylinders 12 based on the instruction from the upper controller 62.
  • the pressing-and-catching controller 66 is configured to perform pressing control, correction control for catching in particular, of the pressing cylinders 4a and 4b.
  • the detection values from the above described deflection-detecting sensors 21 and 22, the load cells 23, the position sensors 55, and the pressure sensors 38 are input to the crowning controller 64.
  • the crowning controller 64 continuously determines the amounts of lateral deflection of the upper and lower frames 2 and 3 based on the detection values from the deflection-detecting sensors 21 and 22 and calculates the amount of extension, that is, the tightening amount of each of the hydraulic crowning cylinders 12 that is required to compensate for the lateral deflection of the frames.
  • the crowning controller 64 continuously determines the compressive deformation of the pressing cylinders 4, the hydraulic crowning cylinders 12, the upper roll frame 5, the upper backup rolls 7, the upper leveling rolls 6, the lower leveling rolls 8, the lower backup rolls 9, and the lower roll frame 10 based on the detection values from the load cells 23 provided between the housing 1 and the pressing cylinders 4a and 4b and calculates the amount of extension, that is, the tightening amount of each of the hydraulic crowning cylinders 12 that is required to compensate for the compressive deformation of these components.
  • the crowning controller 64 sums up these tightening amounts and calculates output signals set so as to feed the pressurized oil having the corresponding pressure to each of the hydraulic crowning cylinders 12.
  • the output signals are fed-back to the control valves 59 to control the hydraulic crowning cylinders 12 so as to minimize the lateral deflection and the compressive deformation.
  • Pressing amounts (penetration amounts) of the pressing cylinders 4a and 4b required to perform leveling (flattening) of the sheet material S, depending on the thickness of the sheet material S, etc., are set in the pressing-and-catching controller 66.
  • the pressing amount (specified pressing amount) specified, or set, for the entrance-side pressing cylinders (pressing cylinders 4a when the transfer direction of the sheet material S is the direction A) exceeds the pressing amount (catch limit pressing amount) that is a limit value, at or under which the sheet material S is caught, a failure in catching the sheet material S between the upper leveling rolls 6 and the lower leveling rolls 8, that is, a catch failure occurs.
  • a catch correction table that is a table for correction control for catching as illustrated in FIG. 7 is input in the pressing-and-catching controller 66.
  • the catch correction table is input via a touch panel of an operating section (not shown) or read from a storage medium storing the catch correction table.
  • catch limit pressing amount ⁇ L (mm), catch correction control distance Lb (mm), and pressing correction speed IV (mm/sec) are set for each of the ranges of the sheet-material thickness.
  • the catch correction control is performed using the catch correction table shown in FIG. 7 .
  • the pressing-and-catching controller 66 performs control to keep the pressing amount at the catch limit pressing amount ⁇ L until the sheet material S is caught and the leading edge of the sheet material S reaches a distance of Lb from the peak of the reference leveling roll (the leftmost leveling roll when the transfer direction is the direction A), and the pressing-and-catching controller 66 performs control to bring the pressing amount (penetration amount) of the entrance-side pressing cylinders to the specified pressing amount at the pressing correction speed IV entered in the catch correction table after the leading edge of the sheet material S is caught by a distance of Lb from the reference leveling roll.
  • a plurality of optical sensors (not shown) for detecting the position of the leading edge of the sheet material S are disposed along the pass line in the leveling roll unit 20, so that the position information of this sheet material S is obtained by detecting the leading edge of the sheet material S with the use of these sensors and tracking the leading edge of the sheet material S with the use of a pulse generator (not shown).
  • the sheet material S is transferred from the upstream side of the leveling roll unit 20 of the roller leveler 100 to the leveling roll unit 20, with the sheet material S being guided by the guide roll 14, and is inserted between the upper leveling rolls 6 and the lower leveling rolls 8.
  • the sheet material S is transferred to the leveling unit 20 from the left side in FIG. 1 , that is, the pressing cylinders 4a are the entrance-side pressing cylinders.
  • the pressing amounts (penetration amounts) of the pressing cylinders 4a and 4b that are required to level (flatten) the sheet material S, depending on the thickness of the sheet material S, etc., are set in the control unit 60.
  • the sheet material S is passed between the upper leveling rolls 6 and the lower leveling rolls 8 by the driving force applied by the driving mechanism 15 while pressing the sheet material S at the specified pressing amount (penetration amount), whereby the sheet material S is flattened.
  • the roll pitch P of both the upper and lower leveling rolls 6 and 8 is determined from the maximum requirement yield stress and the corresponding maximum requirement sheet-material thickness of the sheet material to be flattened.
  • the roll diameter D is determined so as to satisfy the relation, 0.5 ⁇ D/P ⁇ 0.9, in relation to the determined pitch P.
  • the maximum torque corresponding to the roll pitch P of both the upper and lower leveling rolls 6 and 8 is determined and the load conditions are then determined.
  • the diameter D of the leveling rolls is set as large as possible relative to the roll pitch P of both the upper and lower leveling rolls 6 and 8, that is, set equal to or greater than 0.9 times of the roll pitch and smaller than the roll pitch, satisfying the relation, 0.9 ⁇ D/P ⁇ 1.0.
  • it becomes possible to use a large universal joint which makes it easy to obtain a large maximum torque. For this reason, it has been a common practice to employ the setting satisfying the relation, 0.9 ⁇ D/P ⁇ 1.0.
  • the plastification ratio is required to be equal to or greater than 0.7, that is, it is required to satisfy the following relation (6).
  • the present inventor has found that, despite the conventional common practice, it is possible to perform leveling or flattening even when leveling rolls with small diameter satisfying the relation, D/P ⁇ 0.9, in relation to the roll pitch P that is determined from the maximum requirement yield stress and the corresponding maximum requirement sheet-material thickness of the sheet material to be flattened, and use of leveling rolls having such a small diameter increases the pressing amount, which makes it possible to level or flatten sheet material that is so thin and high in yield stress that it could not be sufficiently flattened by conventional method.
  • the roll diameter D is determined so as to satisfy the relation, 0.5 ⁇ D/P ⁇ 0.9, in relation to the roll pitch P because the sheet material does not bend along the rolls, that is, the radius of bending of the sheet material does not decrease according to the roll diameter when the value of D/P is equal to or smaller than 0.5.
  • the roll pitch P of both the upper and lower leveling rolls 6 and 8 is determined from the maximum requirement yield stress and the corresponding maximum requirement sheet-material thickness of the sheet material to be flattened, and the maximum torque is also determined from the pitch P. For this reason, the cross-pin units 33, 34, 43, and 44 of the universal spindles 31 and 41 that have the size corresponding to the maximum torque are used.
  • the diameter of the cross-pin unit is slightly smaller than the diameter of the leveling rolls.
  • the diameter D of the upper leveling rolls 6 and the lower leveling rolls 8 satisfies the relation, D/P ⁇ 0.9, that is, the diameter D is smaller as compared to the conventional cases.
  • the universal spindles 31 and 41 are arranged so as to overlap with each other as in the conventional cases, there is a possibility that the roll-side cross-pin units 33 and 43 of the adjacent upper and lower leveling rolls 6 and 8 interfere with each other.
  • the length of the protruding portions 6a of the shafts of the upper leveling rolls 6 and the length of the protruding portions 8a of the shafts of the lower leveling rolls 8 are set different from each other so that the cross-pin units 33 and 43 are staggered to be prevented from interfering with each other.
  • By staggering the upper and lower cross-pin units in this way it is made possible to reduce the roll diameter D only, while securing required maximum torque, so that it becomes easy to secure the required pressing amount.
  • the value of D/P is preferably greater than 0.55 and more preferably greater than 0.6.
  • the value of D/P is preferably less than 0.8 and more preferably less than 0.7.
  • FIG. 8 shows a diagram, in which the abscissa indicates sheet-material thickness and the the ordinate indicates yield stress, showing a region, in which flattening can be performed when the plastification ratio is 70% (0.7).
  • the region, in which flattening can be performed extends to the direction of thin thickness and high yield stress as compared to the case where the roll diameter is 360 mm. This is because the maximum pressing amount is 50 mm when the roll diameter is 360 mm, whereas the maximum pressing amount increases to 80 mm when the roll diameter is 260 mm. It has been found that, since such a large pressing amount is achieved, it becomes possible to perform leveling or flattening of sheet material that is thinner and greater in yield stress.
  • the deflection amounts of the upper and lower frames 2 and 3 are determined based on the detected values from the deflection-detecting sensors 21 and/or 22, and the required tightening amounts of the hydraulic crowning cylinders 12 that are required to compensate for the deflection amounts are calculated to perform crowning correction of the upper leveling rolls 6 based on the required tightening amounts.
  • the required tightening amounts of the hydraulic crowning cylinders 12 that are required to compensate for the deflection amounts are calculated to perform crowning correction of the upper leveling rolls 6 based on the required tightening amounts.
  • the required tightening amounts of the hydraulic crowning cylinders 12 that are required to compensate for the compressive deformation may be calculated in addition to the required tightening amounts of the hydraulic crowning cylinders 12 that are required to compensate for the amounts of lateral deflection of the upper frame 2 and the lower frame 3.
  • the crowning correction of the upper leveling rolls 6 may then be performed based on the total value obtained by summing both the required tightening amounts. In this way, it is made possible to further reduce variations in the penetration amounts in the width direction of the sheet material S to be flattened and it is therefore possible to perform flattening with a further higher degree of flatness.
  • the pressing amount (penetration amount) for the pressing cylinders 4a and 4b that is required to level (flatten) the sheet material S is set in the control unit 60 and the flattening of the sheet material S is performed according to the specified pressing amount (penetration amount).
  • the specified pressing amount (penetration amount) set for the entrance-side pressing cylinders (pressing cylinders 4a when the transfer direction of the sheet material S is the direction A) exceeds catch limit pressing amount that is a limit value, at or under which the sheet material is caught, a failure in catching the sheet material S between the upper leveling rolls 6 and the lower leveling rolls 8, that is, a catch failure occurs.
  • the diameter of leveling rolls is reduced as in the case of the present embodiment as compared to conventional cases to increase the pressing amount, a catch failure occurs more easily.
  • the pressing-and-catching controller 66 of the control unit 60 compares the specified pressing amount ⁇ e1 of the entrance-side pressing cylinders set according to conditions, such as sheet-material thickness, and the catch limit pressing amount ⁇ L corresponding to the range of the sheet-material thickness of the sheet material S in the catch correction table in FIG. 7 with each other before the sheet material S is caught between the upper leveling rolls 6 and the lower leveling rolls 8 of the leveling roll unit 20.
  • the specified pressing amount ⁇ e1 exceeds the catch limit pressing amount ⁇ L, catch correction mode is entered.
  • the pressing amount (penetration amount) of the entrance-side pressing cylinders is set to the specified pressing amount ⁇ e1 at the pressing correction speed IV entered in the catch correction table. Note that in FIGs. 9 and 10 , the reference leveling roll closest to the entrance side is numbered #1, and the remaining rolls are numbered #2 to #9 in order from left to right.
  • the sheet material S is caught between the upper and lower leveling rolls when the pressing amount is equal to the catch limit pressing amount ⁇ L, which is almost proportional to the thickness of the sheet material S.
  • the catch limit pressing amount ⁇ L is entered in the catch correction table and the above certain length is entered as the catch correction control distance Lb for each sheet-material thickness of the sheet material S, it is made possible to swiftly perform setup of the leveling rolls to the specified pressing amount ⁇ e1 to flatten the sheet material S while reliably preventing the catch failure. As a result, it is made possible to keep high the yield of the sheet material S after flattening.
  • the pressing correction speed IV is the speed of change from the catch limit pressing amount to the specified pressing amount ⁇ e1. Since an appropriate value of the pressing correction speed IV depending on the thickness of the sheet material S exists, it is possible to perform setup of the leveling rolls to the specified pressing amount ⁇ e1 at an optimum speed by entering the press correction speed IV in the correction table in advance.
  • the present invention is not limited to the above embodiment and various modifications can be made.
  • the form of the sheet material is flattened by pressing (pushing downward) the upper leveling rolls toward the pass line with the use of the pressing cylinders
  • the form of the sheet material may be flattened by pressing (pushing upward) the lower leveling rolls toward the pass line with the use of pressing cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Press Drives And Press Lines (AREA)
EP13749297.1A 2012-02-13 2013-01-31 Niveleuse à cylindres et procédé pour le dressage de matériau en feuille Withdrawn EP2815817A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012028973 2012-02-13
PCT/JP2013/052262 WO2013121891A1 (fr) 2012-02-13 2013-01-31 Niveleuse à cylindres et procédé pour le dressage de matériau en feuille

Publications (2)

Publication Number Publication Date
EP2815817A1 true EP2815817A1 (fr) 2014-12-24
EP2815817A4 EP2815817A4 (fr) 2015-11-18

Family

ID=48920369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13749297.1A Withdrawn EP2815817A4 (fr) 2012-02-13 2013-01-31 Niveleuse à cylindres et procédé pour le dressage de matériau en feuille

Country Status (8)

Country Link
US (1) US20150013418A1 (fr)
EP (1) EP2815817A4 (fr)
JP (1) JPWO2013121891A1 (fr)
KR (1) KR101559159B1 (fr)
CN (2) CN103240299A (fr)
CA (1) CA2864380A1 (fr)
IN (1) IN2014KN01742A (fr)
WO (1) WO2013121891A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2864380A1 (fr) * 2012-02-13 2013-08-22 Jp Steel Plantech Co. Niveleuse a cylindres et procede pour le dressage de materiau en feuille
US9815099B2 (en) * 2015-06-03 2017-11-14 The Bradbury Company, Inc. Methods and apparatus to determine a plunge depth position of material conditioning machines
JP6542708B2 (ja) * 2016-04-22 2019-07-10 株式会社Ｓｕｂａｒｕ 表示装置
JP6451696B2 (ja) * 2016-06-10 2019-01-16 Ｊｆｅスチール株式会社 ロールレベラによる鋼板矯正方法およびロールレベラ
JP2020508880A (ja) * 2017-03-13 2020-03-26 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング ローラー矯正機械を作動するための方法、および、ローラー矯正機械
DE102017110891B3 (de) * 2017-05-18 2018-07-12 Kohler Maschinenbau Gmbh Richtmaschine und Verfahren zum Betreiben einer solchen
EP3686311B1 (fr) * 2017-11-30 2021-06-23 Primetals Technologies Japan, Ltd. Dispositif de correction de gauchissement de plaque pour plaques métalliques et équipement de traitement de placage continu pour plaques métalliques
US11400502B2 (en) * 2018-09-13 2022-08-02 Fuelcell Energy, Inc. Edge leveler with offset rollers
CN111014351B (zh) * 2019-12-17 2021-07-30 江苏隆达超合金股份有限公司 多斜辊矫直控制镍管屈服强度的方法
CN111468543A (zh) * 2020-05-14 2020-07-31 中冶京诚工程技术有限公司 带钢除鳞生产线及带钢除鳞方法
CN114101386A (zh) * 2021-11-12 2022-03-01 山东吉祥歌建材科技有限公司 一种铝塑板四面修边整平设备
CN114472595B (zh) * 2022-01-11 2023-09-29 江苏雪隆智能装备有限公司 一种智能全自动式液压精密矫平机
CN114798814A (zh) * 2022-04-27 2022-07-29 江苏祺昌包装有限公司 一种马口铁开平机
CN115284398B (zh) * 2022-07-22 2023-04-18 绿盛环保材料(集团)有限公司 一种再生低碳木枋及其生产线
CN116456603B (zh) * 2023-05-19 2023-08-22 四川英创力电子科技股份有限公司 一种高效整平印制电路板的整平装置及方法
CN116984421B (zh) * 2023-09-25 2023-12-08 太仓庄正数控设备有限公司 一种矫平机的滚筒控制方法及系统

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6030507A (ja) * 1983-07-27 1985-02-16 Mitsubishi Heavy Ind Ltd ロ−ル駆動装置
JP2761058B2 (ja) * 1989-11-13 1998-06-04 三菱重工業株式会社 近接回転軸の自在接手
US5255548A (en) * 1992-03-02 1993-10-26 Mesta International Method for roller levelling of heavy plate
JP3726146B2 (ja) 1997-10-22 2005-12-14 住友重機械工業株式会社 ローラレベラーのクラウニング装置およびロール横撓み補正方法
JP3308892B2 (ja) * 1998-04-20 2002-07-29 住友重機械工業株式会社 ローラレベラ
JP3443036B2 (ja) * 1999-05-20 2003-09-02 住友重機械工業株式会社 ローラレベラーのクラウニング補正方法およびクラウニング装置
JP2001252720A (ja) * 2000-03-09 2001-09-18 Nippon Steel Corp ローラ矯正方法とそのローラ矯正設備
JP2003117606A (ja) * 2001-10-09 2003-04-23 Nippon Steel Corp ローラ矯正方法
CN100374223C (zh) * 2006-03-02 2008-03-12 太原科技大学 一种15辊复合矫直机
JP2009255148A (ja) 2008-04-18 2009-11-05 Kohan Sendan Kikai Kk ローラレベラ
JP5168170B2 (ja) * 2009-01-29 2013-03-21 新日鐵住金株式会社 ローラ矯正における被矯正材の材料定数および矯正状態の推定方法ならびにローラレベラの操業方法
CN101856680B (zh) * 2010-06-21 2011-09-28 长治钢铁（集团）锻压机械制造有限公司 校平机
CA2864380A1 (fr) * 2012-02-13 2013-08-22 Jp Steel Plantech Co. Niveleuse a cylindres et procede pour le dressage de materiau en feuille

Also Published As

Publication number Publication date
WO2013121891A1 (fr) 2013-08-22
CN203245215U (zh) 2013-10-23
CA2864380A1 (fr) 2013-08-22
KR101559159B1 (ko) 2015-10-08
CN103240299A (zh) 2013-08-14
IN2014KN01742A (fr) 2015-10-23
EP2815817A4 (fr) 2015-11-18
JPWO2013121891A1 (ja) 2015-05-11
KR20140112051A (ko) 2014-09-22
US20150013418A1 (en) 2015-01-15

Similar Documents

Publication Publication Date Title
EP2815817A1 (fr) Niveleuse à cylindres et procédé pour le dressage de matériau en feuille
US9333546B2 (en) Roller leveler and metal sheet flattening method
JP4819202B1 (ja) 圧延機および圧延機の零調方法
US9387526B2 (en) Roller leveler and plate flattening method using the same
KR101574032B1 (ko) 금속 판재의 압연 장치
US8616034B2 (en) Method for controlling side guides of a metal strip
EP1607149B1 (fr) Procede et appareil de laminage de materiau de plaque metallique
JP3121471B2 (ja) 圧延機および圧延方法
KR20140036041A (ko) 롤러 레벨러 및 이를 이용한 판재의 교정 방법
US20060230804A1 (en) Method and device for rolling metal plate material
US20130327111A1 (en) Roller leveler and metal sheet flattening method
EP3205414A1 (fr) Procédé de production d'une plaque métallique à arêtes saillantes, plaque métallique à arêtes saillantes et composant structural
TWI380858B (zh) 板壓延機及板壓延方法
JP4267609B2 (ja) 金属板材の圧延方法および圧延装置
CN110382127B (zh) 交叉角识别方法、交叉角识别装置及轧机
JP5533754B2 (ja) 金属板材のタンデム圧延設備及び熱間圧延方法
US20100242566A1 (en) Method for a operating a rolling mill train with curvature recognition
JPS5942135A (ja) 薄板波加工装置
JP5041006B2 (ja) ゼンジミアミルのロールポジション設定方法
CN112437701B (zh) 轧机和轧机的设定方法
JP7067541B2 (ja) 圧延機の制御方法および制御装置
TWI505879B (zh) Roller straightening machine and plate correction method
CN113165034B (zh) 不等边角钢的长边前端面成形装置、长边前端面成形方法及制造方法、以及热精轧设备
KR20180129350A (ko) 냉간 압연기
JP2005161373A (ja) 冷間タンデム圧延機の形状制御方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140910

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
RA4 Supplementary search report drawn up and despatched (corrected)

Effective date: 20151015

RIC1 Information provided on ipc code assigned before grant

Ipc: B21D 1/05 20060101AFI20151009BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20160514