WO2013121891A1 - ローラレベラおよび板材の矯正方法 - Google Patents
ローラレベラおよび板材の矯正方法 Download PDFInfo
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- WO2013121891A1 WO2013121891A1 PCT/JP2013/052262 JP2013052262W WO2013121891A1 WO 2013121891 A1 WO2013121891 A1 WO 2013121891A1 JP 2013052262 W JP2013052262 W JP 2013052262W WO 2013121891 A1 WO2013121891 A1 WO 2013121891A1
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- roll
- leveling
- pressing
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- 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
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- 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
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- 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 correcting a plate material such as a metal plate such as a steel plate and a method for correcting the plate material.
- a roller leveler in which a plurality of leveling rolls are arranged in a zigzag manner in the vertical direction is used for the purpose of flattening the plate material by correcting such warpage and wave shape deformation (for example, Patent Document 1).
- the roller leveler passes the plate to be corrected in a state where a plurality of upper leveling rolls are pushed into a plurality of lower leveling rolls or a state where a plurality of lower leveling rolls are pushed into a plurality of upper leveling rolls. Is repeatedly bent to flatten the warpage and wave shape of the plate material.
- the pitch between rolls of the leveling roll is determined by the maximum required yield stress of the plate material to be corrected and the maximum required plate thickness at that time, and the maximum correction force (pressing force) is determined by the determined pitch between the rolls. ) And maximum torque are determined.
- the diameter of the leveling rolls are set as large as possible, more than 0.9 times the roll pitch It is assumed that it is less than 1.0.
- the maximum required yield stress and the maximum required plate thickness mean the maximum value of the yield stress and the maximum value of the plate thickness that are required by the user as the specifications of the plate material, but these terms are used in the following explanation in a simplified manner. To do. The reason why the pitch between rolls is determined by the yield stress and the plate thickness of the plate to be corrected will be described in detail in the section “Description of Embodiment”.
- the present invention has been made in view of such a situation, and provides a roller leveler and a plate material correcting method capable of leveling correction even for a thin metal plate having a high yield stress, such as a plate material such as a steel plate. Is an issue.
- a roller leveler that corrects a plate material through a threading line, arranged in a zigzag pattern above and below the threading line line, and correcting the sheet material with the plate material interposed therebetween.
- a leveling roll unit having a plurality of leveling rolls rotating so as to pass the plate material, and provided on the entrance side and the exit side of the plate material in the leveling roll unit, respectively, and press the plate material via the leveling roll A pressing cylinder; a plurality of backup rolls for backing up the leveling roll; and a drive mechanism for rotating the leveling roll to pass the plate material, the plurality of leveling rolls having a diameter D Of the leveling roll determined by the maximum required yield stress and the maximum required thickness of the plate.
- To pitch P between Lumpur provides a roller leveler is obtained by a value satisfying 0.5 ⁇ D / P ⁇ 0.9.
- the apparatus further includes a control device that controls an amount of pressing of the plate material by the pressing cylinder so that the plate material is engaged between upper and lower leveling rolls of the leveling roll unit.
- the biting limit pushing amount which is the pushing amount of the limit that the plate material bites between the upper and lower leveling rolls of the leveling roll unit, and the plate material to be controlled to the biting limit pushing amount
- a biting correction table in which a biting correction control distance, which is a moving distance of the tip, is set, and the control device has a setting push amount required for correcting the plate material of the entry side pressing cylinder is set to the biting limit pushing If the amount is larger than the amount, based on the biting correction table, the pushing amount of the pressing cylinder on the entry side is determined until the tip of the plate reaches the biting correction control distance.
- the biting correction table further includes a pressing speed when the pressing amount of the pressing cylinder on the entry side is set to the set pressing amount when the front end of the plate material reaches the biting correction control distance.
- the control device is configured to control a pressing speed when the pressing amount of the entry-side pressing cylinder is changed from the biting limit pressing amount to the setting pressing amount based on the biting correction table. preferable.
- a roller leveler that corrects a plate material through a passing plate line, and is arranged in a zigzag manner above and below the passing plate line so as to pass the plate material while correcting the plate material.
- a leveling roll unit having a plurality of leveling rolls that rotate, a plurality of backup rolls that back up the plurality of leveling rolls up and down, a pair of roll frames that support the leveling roll and the backup roll above and below, a pair of frames for supporting the pair of roll frame up and down, the input side and respectively provided on the outlet side of the plate in the leveling roll unit, towards one in which actuation frame of the pair of frames in the through plate line Press forward through the corresponding one of the roll frames Between the pressing cylinder that presses the plate material between leveling rolls, the drive mechanism that rotates the leveling roll, and the corresponding one of the operating frame and the roll frame, the width perpendicular to the plate passing direction of the plate material.
- a plurality of hydraulic crowning cylinders mounted along a direction, and a control device that controls correction of the plate material, wherein the plurality of leveling rolls have a diameter D that is a maximum required yield stress and a maximum value of the plate material.
- the control device eliminates the compression deformation based on the compression deformation information of the pressing cylinder, the hydraulic crowning cylinder, the pair of roll frames, the backup roll, and the leveling roll. Calculate the necessary tightening amount of each of the hydraulic crowning cylinders necessary, and based on the total value of the necessary tightening amounts and the necessary tightening amounts to eliminate the deflection amount of the pair of frames.
- Each of the crowning cylinders can be controlled to be tightened.
- the control device is configured so that the biting limit pushing amount that is a pushing amount of a limit that the plate material bites between the upper and lower leveling rolls of the leveling roll unit according to the thickness of the plate material.
- a biting correction table in which a biting correction control distance that is a moving distance of the tip of the plate material to be controlled to the biting limit pushing amount is set, and the control device includes the biting correction table.
- the pushing amount of the pressing cylinder is limited to the biting limit pushing amount so that the pushing amount of the pressing cylinder on the entry side becomes the set pushing amount when the front end of the plate material reaches the biting correction control distance.
- the biting correction table further includes a pressing speed when the pressing amount of the pressing cylinder on the entry side is set to the set pressing amount when the front end of the plate material reaches the biting correction control distance.
- the control device is configured to control a pressing speed when the pressing amount of the entry-side pressing cylinder is changed from the biting limit pressing amount to the setting pressing amount based on the biting correction table. preferable.
- the diameter D and the pitch P satisfy 0.55 ⁇ D / P ⁇ 0.8.
- the drive mechanism includes: an upper leveling roll drive motor for driving the upper leveling roll; and an upper leveling roll power transmission unit that transmits the power of the upper leveling roll drive motor to the upper leveling roll.
- a lower leveling roll drive unit consisting of a the upper leveling rolls power transmission part and the lower leveling rolls power transmission unit is preferably disposed so as not to interfere with each other.
- a plate material correcting method for correcting the plate material by a roller leveler that corrects the plate material through a passing plate line, the roller levelers being arranged in a staggered manner above and below the passing plate line, A leveling roll unit having a plurality of leveling rolls rotating so as to pass the plate material while correcting the plate material, and provided on the entry side and the exit side of the plate material in the leveling roll unit, respectively.
- a pressing cylinder that presses the plate material, a plurality of backup rolls that back up the leveling roll, and a drive mechanism that rotates the leveling roll to pass the plate material, and the method includes the plurality of methods.
- the maximum required drop of the plate material to correct the pitch P between rolls of leveling rolls Determined by stress and maximum required thickness, the diameter D of the leveling rolls, to provide a method of correcting plate for correcting the plate as a value satisfying 0.5 ⁇ D / P ⁇ 0.9.
- a plate material correcting method for correcting the plate material by a roller leveler that corrects the plate material through a passing plate line, the roller levelers being arranged in a staggered manner above and below the passing plate line,
- a leveling roll unit having a plurality of leveling rolls that rotate to pass the plate material while correcting the plate material, a plurality of backup rolls that back up the plurality of leveling rolls up and down, the leveling roll, and the backup a pair of roll frame supporting the roll in these upper and lower, and a pair of frames for supporting the pair of roll frame up and down, respectively provided on the inlet side and the outlet side of the plate in the leveling roll unit, the pair The operating frame which is one of the frames is connected to the through-plate line.
- a pressing cylinder that presses the plate material between the leveling rolls via a corresponding one of the roll frames, a drive mechanism that rotates the leveling rolls, and the corresponding ones of the operating frame and the roll frame.
- a plurality of hydraulic crowning cylinders mounted along a width direction perpendicular to the sheet passing direction of the plate material, and the method corrects the pitch P between the rolls of the plurality of leveling rolls. determining a maximum requested yield stress and the maximum required thickness of the plate to be, the diameter D of the leveling rolls, a value satisfying 0.5 ⁇ D / P ⁇ 0.9, and the width of the pair of frame The lateral deflection amount in the direction is calculated, and the necessary tightening amount of each hydraulic crowning cylinder necessary to eliminate this deflection amount is calculated. Provides a method of correcting plate for controlling tightening of each of said hydraulic crowning cylinders based on the required tightening amount.
- the hydraulic type necessary to eliminate this compression deformation Calculate the required tightening amount of each of the crowning cylinders, and calculate each of the hydraulic crowning cylinders based on the total value of the necessary tightening amounts and the necessary tightening amounts to eliminate the bending amount of the pair of frames. It is preferable to perform tightening control.
- a biting limit push amount that is a limit push amount that the plate material bites between the upper and lower leveling rolls of the leveling roll unit, and the meshing Based on the biting correction table in which the biting correction control distance, which is the moving distance of the plate material tip to be controlled to the biting limit pressing amount, is set, the set pressing amount necessary for correcting the plate material of the entry side pressing cylinder is When it is larger than the biting limit pushing amount, the pushing amount of the pressing cylinder on the entry side is limited to the biting limit pushing amount until the tip of the plate material reaches the biting correction control distance, It is preferable that when the front end reaches the biting correction control distance, the pressing amount of the entry-side pressing cylinder becomes the set pressing amount.
- the biting correction table further includes a pressing speed when the pressing amount of the pressing cylinder on the entry side is set to the set pressing amount when the front end of the plate material reaches the biting correction control distance. It is preferable to control the pressing speed when the pressing amount of the entry-side pressing cylinder is changed from the biting limit pressing amount to the setting pressing amount based on the biting correction table.
- the plurality of leveling rolls has a diameter D of 0. 0 to the pitch P between the rolls of the leveling roll determined by the maximum required yield stress of the plate material to be corrected and the maximum required plate thickness at that time. Since the value satisfies 5 ⁇ D / P ⁇ 0.9, the plate material can be strongly bent by increasing the amount of pressing. For this reason, even if it is a thin board
- FIG. 1 is a side view showing a roller leveler according to an embodiment of the present invention
- FIG. 2 is a front view thereof.
- the roller leveler 100 according to 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 suspended below the upper frame 2 by an upper roll grip cylinder (not shown).
- a lower roll frame 10 is installed on the lower frame 3.
- the upper frame 2 moves up and down by being pressed by a pressing cylinder (also referred to as a reduction cylinder), and therefore can be called an operation frame.
- the operation frame is not limited to the upper frame 2, and the lower frame 3 may be configured as an operation frame and moved up and down by being pushed by a pressing cylinder provided below the operation frame.
- a leveling roll unit 20 having a roll 6 and a plurality of lower leveling rolls 8 is provided.
- the upper leveling roll 6 is supported by the upper roll frame 5 below the upper roll frame 5
- the lower leveling roll 8 is supported by the lower roll frame 10 on the lower roll frame 10.
- Guide rolls 14 for guiding the plate material S are provided on the upstream side and the downstream side in the conveyance direction of the plate material S of the leveling roll unit 20.
- the upper leveling roll 6 and the lower leveling roll 8 are rotated by a drive mechanism 15 and can correct the plate material S by moving it in either the arrow A direction or the arrow B direction in FIG. It has become.
- a plurality of short upper backup rolls 7 for backing up the upper leveling roll 6 are arranged on the upper leveling roll 6 so as to be supported by the upper roll frame 5 along the axial direction of the upper leveling roll 6.
- a plurality of short lower backup rolls 9 for backing up the lower leveling rolls 8 are arranged below the lower leveling rolls 8 so as to be supported by the lower roll frame 10 along the axial direction of the lower leveling rolls 8. .
- the pitch between the rolls of the upper and lower leveling rolls 6 and 8 is the maximum required yield stress of the plate S to be corrected and the maximum required plate thickness at that time (the yield stress required by the user as the specification of the plate). Maximum value and maximum plate thickness). This is because the correction reaction force required for the roller leveler 100 is calculated by the following equation (1) from the plate thickness and yield stress required by the user.
- F 2 ⁇ (3- (1- ⁇ ) 2 ) ⁇ (W ⁇ ⁇ y ⁇ T 2 ) / (3000 ⁇ L) ⁇ ⁇ (1)
- F is the correction reaction force
- ⁇ is the yield rate
- W is the plate width (mm)
- ⁇ y is the yield stress (kgf / mm 2 )
- T is the plate thickness (mm)
- L is the pitch between rolls (mm)
- ⁇ is an actual measurement coefficient.
- the correction reaction force is proportional to the yield stress ⁇ y, proportional to the square of the sheet thickness T, and inversely proportional to the pitch L between the rolls. If this is simplified, it can be expressed by the equation (2)
- F K 1 ⁇ T 2 ⁇ ⁇ y / L (K 1 is a coefficient).
- the correction reaction force obtained by the roller leveler increases as the diameter of the backup rolls (corresponding to the upper and lower backup rolls 7, 9) arranged outside the leveling roll increases.
- Formula (4) represents that the pitch L between the rolls of the upper and lower leveling rolls 6 and 8 is determined by the yield stress ⁇ y and the thickness T of the plate material S to be corrected.
- L [(K 1 ⁇ T 2 ⁇ ⁇ y) / K 2 ] 1/2 (4)
- the diameter of the leveling roll is set to be as large as possible from the viewpoint of ensuring sufficient sheet passing and sufficient transmission torque with respect to the pitch between the rolls determined in this way, and 0.9 times or more the pitch between the rolls. It is assumed that it is less than 1.0.
- the leveling roll unit 20 according to the embodiment of the present invention, as shown in FIG.
- the pitch P between the rolls in each of the upper and lower leveling rolls 6 and 8 (corresponding to the pitch L of the formula (4)). ) And the roll diameter D are arranged so as to satisfy the relationship of 0.5 ⁇ D / P ⁇ 0.9. That is, the roll diameter D is smaller than the conventional case of 0.9 ⁇ D / P ⁇ 1.0.
- the value of D / P is preferably in the range of 0.55 ⁇ D / P ⁇ 0.8, particularly in the range of 0.6 ⁇ D / P ⁇ 0.7.
- the sheet S at both ends in the conveying direction of the leveling roll unit 20 between the housing 1 and the upper frame 2, (also referred to as a pressure cylinder) down cylinder to provide respective rolling force for correcting plate S (also referred to as pressure) 4a and 4b are arranged.
- Two rolling-down cylinders 4a and 4b are provided on both ends (drive side and workpiece side) in the width direction of the plate material S (see FIG. 2, but only the rolling-down cylinder 4a is shown in FIG. 2).
- the term “reducing” is intended to encompass not only the case where pressure is applied downward as shown in FIG. 1, but also the case where pressure is applied upward as described later as a modified example. To do.
- the term “pressing” can be replaced with the term “pressing”.
- the reduction cylinders 4 a and 4 b are configured to reduce the plate material S via the upper roll frame 5, the upper backup roll 7, and the upper leveling roll 6 with respect to the lower leveling roll 8 fixedly provided on the lower roll frame 10. It has become.
- the upper leveling roll 6 and the lower leveling roll 8 are rotated by a drive mechanism 15.
- the drive mechanism 15 is drawn so as to be connected to the entire row of the upper and lower leveling rolls 6, 8, but actually, the upper leveling roll 6 and the lower leveling roll 8 are individually provided as described later. It is designed to be rotationally driven. Then, while the plate material S is passed between the upper leveling roll 6 and the lower leveling roll 8 by the drive mechanism 15, the plate material S is leveled down by the reduction cylinders 4a and 4b via the upper leveling roll 6. to correct.
- the reduction cylinder 4a When transporting the plate material S in the direction A in FIG. 1, the reduction cylinder 4a functions as an inlet-side reduction cylinder, and the reduction cylinder 4b functions as an outlet-side reduction cylinder.
- the reduction cylinder 4b When conveying the plate material S in the direction B, the reduction cylinder 4b functions as an entry-side reduction cylinder, and the reduction cylinder 4a functions as an exit-side reduction cylinder.
- the upper leveling roll 6 may be fixedly provided, and the lower leveling roll 8 may be reduced by a reduction cylinder.
- the drive mechanism 15 includes an upper leveling roll drive unit 30 including a universal spindle 31 and a drive motor 32 as a power transmission unit connected to the protruding portion 6a of the shaft of the upper leveling roll 6, and a lower leveling roll drive unit 30.
- the leveling roll 8 includes a universal spindle 41 as a power transmission unit connected to the protruding portion 8 a of the shaft of the leveling roll 8 and a lower leveling roll driving unit 40 including a driving motor 42.
- the universal spindles 31 and 41 are for transmitting power to a portion whose axis does not coincide with the driving side.
- the universal spindle 31 has a pair of cross pin units 33 and 34 and an intermediate shaft 35 provided therebetween.
- the universal spindle 41 has a pair of cross pin units 43 and 44 and an intermediate shaft 45 provided therebetween.
- the shaft of the motor 32 and the cross pin unit 34 on the motor 32 side are connected by a shaft 32a, and the shaft of the motor 42 and the cross pin unit 44 on the motor 42 side are connected by a shaft 42a.
- the universal spindles 31 and 41 that are the power transmission portions of the adjacent upper leveling roll 6 and lower leveling roll 8 are the same. From the viewpoint of avoiding the possibility of interference, they are arranged so as not to interfere with each other. Specifically, from the viewpoint of avoiding the possibility that the cross-pin units 33 and 43 on the roll side of the universal spindles 31 and 41 interfere with each other, the protruding portion 6a of the shaft of the upper leveling roll 6 and the protruding of the shaft of the lower leveling roll 8 are used. The position of the cross pin units 33 and 43 is shifted by changing the length of the portion 8a.
- a plurality (seven in this embodiment) of hydraulic crowning cylinders 12 are connected between the upper frame 2 and the upper roll frame 5 in the plate width direction. As shown in FIG. 2, each crowning cylinder 12 is installed at an equal pitch so as to correspond to the upper leveling roll 6 and the lower leveling roll 8 along the width direction orthogonal to the plate passing direction of the plate material S.
- the hydraulic crowning cylinders 12 are installed in two rows as shown in FIG. In addition, the row
- the hydraulic crowning cylinder 12 has a cylinder body 51 and a piston 52, and the upper end of the piston 52 is connected to the upper frame 2 via a spherical joint member 53, and the bottom of the cylinder body 51 is It is connected to the upper roll frame 5 via a slide joint 54.
- This hydraulic crowning cylinder 12 has a built-in position detection sensor 55.
- the hydraulic crowning cylinder 12 expands and contracts by hydraulic pressure, and an oil supply line 56 that supplies oil to an extension-side oil chamber (not shown) for extension operation, and a release line 57 that releases hydraulic pressure, Is connected.
- the oil feed line 56 is connected to a pressure detector 58 for detecting the oil pressure in the extension side oil chamber and a control valve 59 for controlling the oil feed amount.
- a control valve 59 a servo valve or a proportional control valve is used.
- a deflection detection sensor 21 for detecting the lateral deflection of the upper frame 2 is provided at the lateral center position.
- two bending detection sensors 21 are provided along the path line of the plate material S.
- the deflection detection sensor 21 always detects the distance to the lower end of the upper frame 2 and calculates the deflection amount of the upper frame 2 based on this distance.
- a deflection detection sensor 22 is attached to the inner space of the lower frame 3.
- Two deflection detection sensors 22 are provided along the pass line of the plate material S at the lateral center position.
- the deflection detection sensor 22 always detects the distance to the upper end of the lower frame 3 and calculates the deflection amount of the lower frame 3 based on this distance.
- a deflection detection sensor may be provided in only one of the upper frame 2 and the lower frame 3, and the deflection amount of the other frame may be obtained by proportional calculation.
- a load cell (or a hydraulic pressure converter) 23 is attached between the reduction cylinders 4a and 4b and the housing 1, whereby the reduction cylinders 4a and 4b, the hydraulic crowning cylinder 12, the upper roll frame 5, and the upper backup roll. 7, compression deformation of the upper leveling roll 6, the lower leveling roll 8, the lower backup roll 9, and the lower roll frame 10 can be detected.
- each component is controlled by the control device 60.
- the control device 60 includes a process controller including a CPU, a user interface including a keyboard and a display, and a recipe storing a control program (software), processing condition data, and the like. Part.
- a recipe storing a control program (software), processing condition data, and the like.
- an arbitrary recipe is called from the storage unit and executed in the process controller.
- a desired process (operation sequence) described later is performed by the roller leveler 100.
- Recipes such as control programs and processing condition data are stored in computer-readable storage media such as magnetic disks (flexible disks, hard disks, etc.), optical disks (CDs, DVDs, etc.), magneto optical disks (MOs, etc.), semiconductor memories, etc. It is possible to use the one that has been made. Alternatively, the recipe can be transmitted online from another device at any time, for example, via a dedicated line.
- the control device 60 controls the reduction amount of the leveling rolls 6 and 8 by the reduction cylinders 4a and 4b for correcting (leveling) the plate material S, as will be described later, according to a control program stored in a computer-readable storage medium.
- the drive mechanism 15 is controlled.
- control device 60 controls the hydraulic crowning cylinder 12 so as to perform lateral deflection correction and compression correction of the frame. Further, the control device 60 is configured to perform the pressure reduction control of the reduction cylinders 4a and 4b, particularly the biting correction control.
- FIG. 6 shows a control block diagram of the control device 60.
- the control device 60 has a host controller 62, a crowning controller 64, and a pressure reduction / biting controller 66, all of which are microprocessors.
- Upper controller 62 is adapted to control the entire roller leveler 100, crowning controller 64, based on a command upper controller 62, controls the operation of the hydraulic crowning cylinders 12, the controller 66 biting pressure-is
- the reduction control of the reduction cylinders 4a and 4b, particularly the biting correction control is performed.
- the detection values of the deflection detection sensors 21 and 22, the load cell 23, the position detection sensor 55, and the pressure detector 58 described above are input to the crowning controller 64.
- the crowning controller 64 constantly grasps the amount of lateral deflection of the upper frame 2 and the lower frame 3 from the detection values of the deflection detection sensors 21 and 22, respectively, and each hydraulic crowning cylinder 12 necessary for correcting the lateral deflection of the frame.
- the extension amount that is, the tightening amount is calculated. Further, the crowning controller 64 compresses the compression cylinders 4a and 4b, the hydraulic crowning cylinder 12, the upper roll frame 5, the upper backup roll 7, the upper leveling roll 6, the lower leveling roll 8, the lower backup roll 9, and the lower roll frame 10.
- the crowning controller 64 sums up these tightening amounts, and calculates an output signal so as to send the hydraulic oil having a pressure corresponding to the tightening amount to each hydraulic crowning cylinder 12.
- the output signal is fed back to the control valve 59 to control each hydraulic crowning cylinder 12 so that the lateral deflection and compressive deformation are minimized.
- the pressing amounts (reduction amounts) of the reduction cylinders 4a and 4b necessary for leveling (correcting) the plate material S are set according to the thickness of the plate material S and the like.
- the set push amount (set push amount) of the entry side reduction cylinder (the reduction cylinder 4a when the conveyance direction of the plate material S is the A direction) is the limit push amount (the bit limit). If the amount exceeds the pushing amount), the plate material S does not bite between the upper leveling roll 6 and the lower leveling roll 8, and a biting failure occurs. Therefore, so that the bite correction table as illustrated in FIG. 7 to the pressing-biting controller 66 in order to prevent such clipping position defects are input.
- the biting correction table is input by a touch panel of an operation unit (not shown) or by reading a storage medium storing the biting correction table.
- biting correction table of FIG. 7 the biting limit pushing amount ⁇ L (mm), the biting correction control distance Lb (mm), and the reduction correction speed IV (mm / sec) are obtained for each plate thickness category. Is set. Then, when the pushing amount (rolling amount) set value of the ingress reduction cylinder exceeds the biting limit pushing amount ⁇ L, the biting correction control is performed using the biting correction table of FIG. Specifically, the reduction / biting controller 66 is configured so that the front end of the plate S is bitten by a distance Lb from the apex of the reference leveling roll on the input side (left leveling roll when the transport direction is A).
- the pushing amount is controlled to the biting limit pushing amount ⁇ L, and after pushing the distance Lb from the entry side reference leveling roll, the pushing amount of the entry side reduction cylinder at the reduction correction speed IV set in the entry correction table. Control is performed so that the (rolling amount) becomes the set pushing amount.
- the position information of the plate material S at this time is provided with a plurality of optical sensors (not shown) for detecting the position of the front end of the plate material S along the pass line in the leveling roll unit 20, and thereby the plate material S Can be obtained by tracking the tip of the plate S using a pulse generator (not shown).
- the plate material S is conveyed toward the leveling roll unit 20 while being guided by the guide roll 14 from the upstream side of the leveling roll unit 20 of the roller leveler 100, and is inserted between the upper leveling roll 6 and the lower leveling roll 8. .
- the transport direction of the sheet S is A direction
- pressure cylinder 4a is pressure cylinder inlet side.
- the pressing amount (the pressing amount) of the reduction cylinders 4a and 4b necessary for leveling (correcting) the plate material S is set in the control device 60 according to the thickness of the plate material S, and the set pressing amount.
- the plate material S is corrected by causing the plate material S to pass between the upper leveling roll 6 and the lower leveling roll 8 by the driving force of the drive mechanism 15 while the plate material S is being reduced by the amount of reduction.
- the inter-roll pitch P in each of the upper and lower leveling rolls 6 and 8 is determined by the maximum required yield stress of the plate material to be corrected and the maximum required plate thickness at that time.
- the roll diameter D is determined so as to satisfy 5 ⁇ D / P ⁇ 0.9.
- the maximum torque is determined corresponding to the pitch P between the rolls of the upper and lower leveling rolls 6 and 8, and the load condition is determined.
- the diameter D of the leveling roll is set to be as large as possible from the viewpoint of ensuring sufficient sheet passing and sufficient transmission torque with respect to the pitch P between the rolls of the upper and lower leveling rolls 6 and 8. 0.9 times or more and less than 1.0 times, that is, 0.9 ⁇ D / P ⁇ 1.0.
- the larger the diameter of the leveling roll the smaller the bending radius of the plate material to be passed, and the smaller the maximum push-in amount, the easier it is to pass, and the larger the universal joint, the easier it is to secure the maximum torque. .
- the plate thickness of the plate material S is T (mm)
- the Young's modulus is E (N / mm 2 )
- the yield is increased.
- the stress is ⁇ y (N / mm 2 )
- the roll diameter is D (mm)
- the yield rate is ⁇
- 1 ⁇ ( ⁇ y ⁇ D) / (E ⁇ T) (5)
- the yield ratio needs to be 0.7 or more, and therefore, it is required to satisfy the following formula (6).
- the present inventor that, contrary to the conventional technical common sense, D / P against the roll pitch P determined by the maximum required yield stress and the maximum required thickness at that time the plate material to correct ⁇ 0 .9 can be leveled even if a small diameter leveling roll is used, and the leveling roll is made small so that the amount of push-in increases, and it has not been possible to correct sufficiently in the past. It was found that leveling correction of thin and high yield stress plate materials became possible.
- the inter-roll pitch P in each of the upper and lower leveling rolls 6 and 8 is determined by the maximum required yield stress of the plate material to be corrected and the maximum required plate thickness at that time, and the maximum torque is also determined by the pitch P. , 41 of the cross pin units 33, 34, 43, 44 are of a size corresponding to the maximum torque. If the conventional D / P is used a leveling roll having a 0.9 or more in diameter, the diameter of the cross-pin unit has been slightly smaller than the diameter of the leveling rolls.
- the value of D / P is 0.55 or less, there is a risk of interference between the protruding portions 6a, 8a of the shafts of the upper leveling roll 6 and the lower leveling roll 8 and the cross pin units 33, 43.
- the value of is preferably greater than 0.55, more preferably greater than 0.6.
- the value of D / P is preferably less than 0.8 and more preferably less than 0.7 from the viewpoint of obtaining the effect more reliably.
- FIG. 8 is a diagram showing a correctable region where the yield rate is 70% (0.7), with the horizontal axis representing the plate thickness and the vertical axis representing the yield stress.
- the correctable region is expanded in a range where the yield stress is thin and larger than when the roll diameter is 360 mm. .
- the maximum push amount when the roll diameter is 360 mm is 50 mm
- the maximum push amount when the roll diameter is 260 mm is expanded to 80 mm. It was confirmed that leveling correction in a range where the yield stress was thinner and larger was possible by obtaining such a large indentation amount.
- frame 2 component width direction or devices such as a lower frame 3 (which means the width direction of the frame or the like, but since these transverse direction is parallel to the width direction of the plate material, both the same in the broadest sense In such a case, the amount of pushing varies in the width direction of the plate material due to the influence of the lateral deflection.
- the deflection amounts of the upper frame 2 and the lower frame 3 are obtained based on the detection values of the deflection detection sensors 21 and / or 22, and this deflection amount is obtained.
- the necessary tightening amount of each hydraulic crowning cylinder 12 necessary to eliminate the above is calculated, and the crowning correction of the upper leveling roll 6 is performed based on the calculated amount.
- the lower frame 4a and 4b are mounted between the reduction cylinders 4a and 4b and the housing 1.
- Rolling cylinders 4a, 4b, hydraulic crowning cylinder 12, upper roll frame 5, upper backup roll 7, upper leveling roll 6, lower leveling roll 8, lower backup roll 9, lower roll by load cell (or hydraulic pressure converter) 23 Based on the compression deformation information of the frame 10, the required tightening amount of each hydraulic crowning cylinder 12 necessary to eliminate this compression deformation is calculated, and the upper leveling roll is based on the total value of both necessary tightening amounts. It is also possible to perform six crowning corrections. Thereby, the difference in the amount of reduction in the width direction of the plate material S that is the material to be corrected can be further reduced, and correction with higher flatness can be performed.
- biting correction control will be described.
- the pressing amount (the pressing amount) of the pressing cylinders 4a and 4b necessary for leveling (correcting) the plate material S is set, and the set pressing amount (the pressing amount) is set.
- the plate material S is corrected.
- the set pressing amount (the pressing amount) of the inlet-side reduction cylinder exceeds the biting limit pushing amount, the plate material S.
- a biting defect that does not bite between the upper leveling roll 6 and the lower leveling roll 8 occurs.
- the leveling roll diameter is made smaller than before and the push-in amount is increased as in the present embodiment, a biting failure tends to occur.
- biting correction control is performed based on the biting correction table of FIG. 7 to prevent such biting failure.
- biting correction table of FIG. 7 actual numerical values are actually entered.
- the reduction and biting controller 66 of the control device 60 is used according to the conditions such as the plate thickness.
- the set pushing amount ⁇ e1 of the ingress reduction cylinder is compared with the biting limit pushing amount ⁇ L corresponding to the plate thickness classification of the plate material S in the biting correction table of FIG.
- the mode shifts to the biting correction mode.
- the limit push amount ⁇ L is limited, and such a push amount limit is set in the correction table of FIG. 7 from the apex of the reference leveling roll (# 1 leveling roll in FIG. 9) where the front end of the plate S is the entry side.
- the reduction correction speed IV set in the biting correction table is reached.
- the pushing-in amount (crushing amount) of the inlet-side reduction cylinder is set up to the set pushing amount ⁇ e1.
- FIGS. 9 and 10 are designated by the most inlet-side reference leveling rolls of the # 1, # 2 to # 9 and number in order from the left for a subsequent leveling rolls to the right.
- the pushing amount is the biting limit pushing amount ⁇ L at the biting stage of the plate material S
- this biting limit pushing amount ⁇ L is the thickness of the plate material S. Is almost proportional to When the plate material S is bitten by a predetermined length, the biting failure does not occur even if the pushing amount is larger than the biting limit pushing amount ⁇ L.
- the biting limit pushing amount ⁇ L in the biting correction table according to the plate thickness of the plate material S, and further setting the predetermined length as the biting correction control distance Lb,
- the plate material S can be corrected by setting it up to the set indentation amount ⁇ e1 promptly while preventing defects, and the correction yield of the plate material S can be kept high.
- the reduction correction speed IV is a speed from the biting limit pressing amount to the set pressing amount ⁇ e1, and the reduction correction speed IV also has an appropriate value according to the plate thickness of the plate material S.
- the biting correction control is particularly effective when the pushing amount is large as in the present embodiment.
- biting correction control first, a light reduction corresponding to the biting limit pushing amount ⁇ L is performed, and then the strong pressure corresponding to the set pushing amount ⁇ e1 is changed.
- the set pushing amount ⁇ e1 is large as described above, there is a concern that the uniformity of the roll gap in the width direction of the leveling roll is impaired due to the lateral deflection of the upper frame 2 and the lower frame 3 or the like.
- the crowning correction using the deflection sensors 21 and 22 and the hydraulic crowning cylinder 12
- the uniformity in the width direction of the roll gap can be maintained well, and the set pushing amount ⁇ e1 is large. Even in this case, the biting correction control can be reliably performed.
- the present invention is not limited to the above-described embodiment, and various modifications can be made.
- the case where the upper leveling roll is pressed down (pressed downward) toward the sheet passing line with the reduction cylinder to correct the shape of the plate material has been shown.
- the lower leveling roll is moved through the sheet passing line with the reduction cylinder. You may make it correct
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Abstract
Description
図1は本発明の一実施形態に係るローラレベラを示す側面図、図2はその正面図である。本実施形態のローラレベラ100は、ハウジング1と、ハウジング1の内側に設けられた上フレーム2と、ハウジング1を支持するように設けられた下フレーム3とを有している。上フレーム2の下方には上ロールフレーム5が上ロールグリップシリンダ(図示せず)で吊り下げられている。一方、下フレーム3上には下ロールフレーム10が設置されている。なお、上フレーム2は、後述するように、押圧シリンダ(圧下シリンダともいう)によって押すことによって上下に動作するため、作動フレームと呼ぶことができる。作動フレームは上フレーム2に限定されず、下フレーム3を作動フレームとして構成してその下に設けた押圧シリンダによって押すことによって上下に動作させることもできる。
F=2×(3-(1-η)2)×(W×σy×T2)/(3000×L)×α …(1)
ここで、Fは矯正反力、ηは降伏率、Wは板幅(mm)、σyは降伏応力(kgf/mm2)、Tは板厚(mm)、Lはロール間ピッチ(mm)、αは実測係数である。
換言すると、矯正反力は降伏応力σyに比例し、板厚Tの2乗に比例し、ロール間ピッチLに反比例する。これを簡易化すると式(2)F=K1×T2×σy/Lで表すことができる(K1は係数)。
一方、ローラレベラによって得られる矯正反力はレベリングロールの外側に配設されるバックアップロール(上下バックアップロール7、9に対応する)の直径が大きくなるほど大きくなる。しかし、バックアップロールの最大径はロール間ピッチLとほぼ同じとなり、何故ならバックアップロールがロール間ピッチLより大きな直径をもつことは不可能だからである。従って、ローラレベラによって得られる矯正反力の最大値は式(3)F=K2×Lで表すことができる(K2は係数)。
よって、式(2)、(3)を組み合わせるとK2×L=K1×T2×σy/Lとなり、下記の式(4)が導かれる。式(4)は、上下レベリングロール6、8の夫々におけるロール間ピッチLが矯正しようとする板材Sの降伏応力σyおよび板厚Tによって決定されることを表している。
L=[(K1×T2×σy)/K2]1/2 …(4)
従来は、このように決定されたロール間ピッチに対し、十分な通板性および十分な伝達トルクを確保する観点から、レベリングロールの直径は極力大きく設定され、ロール間ピッチの0.9倍以上1.0未満とされている。
これに対して本発明の実施形態に係るレベリングロールユニット20おいては、図3に示すように、上下レベリングロール6、8の夫々におけるロール間ピッチP(式(4)のピッチLに相当する)とロール直径Dとが、0.5<D/P<0.9の関係を満たすように配置されている。即ち、従来の0.9≦D/P<1.0の場合よりもロール直径Dが小径となっている。D/Pの値は、上記の範囲のうち、0.55<D/P<0.8の範囲が好ましく、特に、0.6<D/P<0.7の範囲が好ましい。
なお、本明細書において、「圧下」という用語は、図1に示すように圧力を下向きに加える場合だけでなく、後に変更例として説明するように圧力を上向きに加える場合も包含することを意図する。換言すれば、本明細書において、「圧下」という用語は、「押圧」という用語に置き換えることができる。
制御装置60は、コンピュータ読み取り可能な記憶媒体に記憶された制御プログラムに従って、後述するように、板材Sの矯正(レベリング)のための圧下シリンダ4a,4bによるレベリングロール6,8の圧下量の制御、駆動機構15の制御を行うようになっている。また、制御装置60は、油圧式クラウニングシリンダ12を絞り込み制御してフレームの横撓み補正および圧縮補正を行うようになっている。さらに、制御装置60は、圧下シリンダ4aおよび4bの圧下制御、特に噛込補正制御を行うようになっている。
制御装置60は、いずれもマイクロプロセッサからなる上位コントローラ62とクラウニングコントローラ64と圧下・噛込コントローラ66とを有している。上位コントローラ62は、ローラレベラ100の全体を制御するようになっており、クラウニングコントローラ64は、上位コントローラ62の指令に基づき、油圧式クラウニングシリンダ12の動作を制御し、圧下・噛み込みコントローラ66は、圧下シリンダ4aおよび4bの圧下制御、特に噛込補正制御を行う。
1-η=(σy×D)/(E×T) …(5)
ここで、十分に内部応力を低減するためには降伏率が0.7以上であることが必要であり、したがって、以下の式(6)を満足することが求められる。
0.3≧(σy×D)/(E×T) …(6)
これを変形すると以下の式(7)となる。
D≦0.3(E×T)/σy …(7)
すなわち、板厚Tが薄いほど、また降伏応力σyが大きいほど、レベリングロールの径を小さくする必要がある。しかし、従来は0.9≦D/Pを満たしたままDを小さくすることしか考えられず、そうするとトルクが小さくなってしまい板材を通板することができなくなる。
上述したように、制御装置60には、板材Sのレベリング(矯正)に必要な圧下シリンダ4aおよび4bの押込量(圧下量)が設定されており、その設定された押込量(圧下量)で板材Sの矯正が行われる。しかし、入側の圧下シリンダ(板材Sの搬送方向がA方向の場合には圧下シリンダ4a)の設定された押込量(圧下量)が、噛込限界押込量を超えている場合には板材Sが上レベリングロール6および下レベリングロール8間に噛み込まれない噛込不良が生じる。特に、本実施形態のようにレベリングロール直径を従来よりも小さくして、押し込み量を増加させる場合には、噛込不良が生じやすい。
2;上フレーム(作動フレーム)
3;下フレーム
4a,4b;圧下シリンダ(押圧シリンダ)
5;上ロールフレーム
6;上レベリングロール
6a,8a;軸の突き出し部分
7;上バックアップロール
8;下レベリングロール
9;下バックアップロール
10;下ロールフレーム
12;油圧式クラウニングシリンダ
15;駆動機構
21,22;撓み検出センサ
30;上レベリングロール駆動部
31,41;ユニバーサルスピンドル
32,42;駆動モータ
33,34,43,44;クロスピンユニット
35,45;中間シャフト
60;制御装置
64;クラウニングコントローラ
66;圧下・噛込コントローラ
100;ローラレベラ
S;板材(被矯正材)
Claims (16)
- 通板ラインを通して板材を矯正するローラレベラであって、
前記通板ラインの上下に千鳥状に配置され、前記板材を挟んで矯正しつつ前記板材を通板させるように回転する複数のレベリングロールを有するレベリングロールユニットと、
前記レベリングロールユニットにおける前記板材の入側および出側にそれぞれ設けられ、前記レベリングロールを介して前記板材を押圧する押圧シリンダと、
前記レベリングロールをバックアップする複数のバックアップロールと、
前記レベリングロールを回転させて前記板材を通板させる駆動機構と、
を具備し、
前記複数のレベリングロールは、その直径Dを、前記板材の最大要求降伏応力および最大要求板厚で決定される前記レベリングロールのロール間ピッチPに対し、0.5<D/P<0.9を満たす値としたものであるローラレベラ。 - 前記板材が前記レベリングロールユニットの上下のレベリングロール間に噛込むように前記押圧シリンダによる前記板材の押込量を制御する制御装置をさらに具備し、
前記制御装置は、前記板材の厚さに応じて、前記板材が前記レベリングロールユニットの上下のレベリングロール間に噛込む限界の押込量である噛込限界押込量と、前記噛込限界押込量に制御すべき前記板材の先端の移動距離である噛込補正制御距離とを設定した噛込補正テーブルを含み、
前記制御装置は、前記入側の押圧シリンダの前記板材の矯正に必要な設定押込量が前記噛込限界押込量よりも大きい場合に、前記噛込補正テーブルに基づいて、前記板材の先端が前記噛込補正制御距離に達するまでは前記入側の押圧シリンダの押込量を前記噛込限界押込量に制限し、前記板材の先端が前記噛込補正制御距離に達した際に前記入側の押圧シリンダの押込量が前記設定押込量になるように制御する請求項1に記載のローラレベラ。 - 前記噛込補正テーブルには、さらに前記板材の先端が前記噛込補正制御距離に達した際に前記入側の押圧シリンダの押込量を前記設定押込量にする際の押圧速度が設定され、前記制御装置は、前記噛込補正テーブルに基づいて、前記入側の押圧シリンダの押込量が前記噛込限界押込量から前記設定押込量に変更する際の押圧速度を制御する請求項2に記載のローラレベラ。
- 通板ラインを通して板材を矯正するローラレベラであって、
前記通板ラインの上下に千鳥状に配置され、前記板材を挟んで矯正しつつ前記板材を通板させるように回転する複数のレベリングロールを有するレベリングロールユニットと、
前記複数のレベリングロールを上下にバックアップする複数のバックアップロールと、
前記レベリングロールおよび前記バックアップロールをこれらの上下で支持する一対のロールフレームと、
前記一対のロールフレームを上下で支持する一対のフレームと、
前記レベリングロールユニットにおける前記板材の入側および出側にそれぞれ設けられ、前記一対のフレームの一方である作動フレームを前記通板ラインに向けて押圧し、前記ロールフレームの対応する一方を介して前記レベリングロール間で前記板材を押圧する押圧シリンダと、
前記レベリングロールを回転させる駆動機構と、
前記作動フレームと前記ロールフレームの前記対応する一方との間に、前記板材の通板方向に直交する幅方向に沿って複数取り付けられた油圧式クラウニングシリンダと、
前記板材の矯正を制御する制御装置と、
を具備し、
前記複数のレベリングロールは、その直径Dを、前記板材の最大要求降伏応力および最大要求板厚で決定される前記レベリングロールのロール間ピッチPに対し、0.5<D/P<0.9を満たす値としたものであり、
前記制御装置は、前記押圧シリンダによる押圧量を制御しつつ前記駆動機構により前記板材を前記レベリングロール間に通板させるように制御し、かつ、前記一対のフレームの幅方向における横撓み量を求め、この撓み量を解消するに必要な前記油圧式クラウニングシリンダのそれぞれの必要締め込み量を算出し、前記必要締め込み量に基づいて前記油圧式クラウニングシリンダのそれぞれを締め込み制御するローラレベラ。 - 前記制御装置は、前記押圧シリンダ、前記油圧式クラウニングシリンダ、前記一対のロールフレーム、前記バックアップロール、前記レベリングロールの圧縮変形情報に基づいて、この圧縮変形を解消するに必要な前記油圧式クラウニングシリンダのそれぞれの必要締め込み量を算出し、この必要締め込み量と前記一対のフレームの撓み量を解消するに必要な必要締め込み量の合計値に基づいて前記油圧式クラウニングシリンダのそれぞれを締め込み制御する請求項4に記載のローラレベラ。
- 前記制御装置は、前記板材の厚さに応じて、前記板材が前記レベリングロールユニットの上下のレベリングロール間に噛込む限界の押込量である噛込限界押込量と、前記噛込限界押込量に制御すべき前記板材の先端の移動距離である噛込補正制御距離とを設定した噛込補正テーブルを含み、
前記制御装置は、前記入側の押圧シリンダの前記板材の矯正に必要な設定押込量が前記噛込限界押込量よりも大きい場合に、前記噛込補正テーブルに基づいて、前記板材の先端が前記噛込補正制御距離に達するまでは前記入側の押圧シリンダの押込量を前記噛込限界押込量に制限し、前記板材の先端が前記噛込補正制御距離に達した際に前記入側の押圧シリンダの押込量が前記設定押込量になるように制御する請求項4または請求項5に記載のローラレベラ。 - 前記噛込補正テーブルには、さらに前記板材の先端が前記噛込補正制御距離に達した際に前記入側の押圧シリンダの押込量を前記設定押込量にする際の押圧速度が設定され、前記制御装置は、前記噛込補正テーブルに基づいて、前記入側の押圧シリンダの押込量が前記噛込限界押込量から前記設定押込量に変更する際の押圧速度を制御する請求項6に記載のローラレベラ。
- 前記直径Dと前記ピッチPとが、0.55<D/P<0.8を満たす請求項1から請求項7のいずれか1項に記載のローラレベラ。
- 前記駆動機構は、前記上レベリングロールを駆動させるための上レベリングロール用駆動モータと、前記上レベリングロール用駆動モータの動力を前記上レベリングロールに伝達する上レベリングロール用動力伝達部とからなる上レベリングロール駆動部、および前記下レベリングロールを駆動させるための下レベリングロール用駆動モータと、前記下レベリングロール用駆動モータの動力を前記下レベリングロールに伝達する下レベリングロール用動力伝達部とからなる下レベリングロール駆動部とを有し、前記上レベリングロール用動力伝達部と前記下レベリングロール用動力伝達部とが、互いに干渉しないように配置されている請求項1から請求項8のいずれか1項に記載のローラレベラ。
- 前記上レベリングロール用動力伝達部は、前記上レベリングロール用駆動モータ側に接続される第1上クロスピンユニットと、前記上レベリングロールの軸の突き出し部分に接続される第2上クロスピンユニットと、これらの間をつなぐ中間シャフトとからなるユニバーサルスピンドルで構成され、前記下レベリングロール用動力伝達部は、前記下レベリングロール用駆動モータ側に接続される第1下クロスピンユニットと、前記下レベリングロールの軸の突き出し部分に接続される第2下クロスピンユニットと、これらの間をつなぐ中間シャフトとからなるユニバーサルスピンドルで構成され、前記上レベリングロールの軸の突き出し部分の長さと、前記下レベリングロールの軸の突き出し部分の長さとを変えて、前記第2上クロスピンユニットと、前記第2下クロスピンユニットとが干渉しないようにした請求項9に記載のローラレベラ。
- 通板ラインを通して板材を矯正するローラレベラにより前記板材を矯正する板材の矯正方法であって、前記ローラレベラは、前記通板ラインの上下に千鳥状に配置され、前記板材を挟んで矯正しつつ前記板材を通板させるように回転する複数のレベリングロールを有するレベリングロールユニットと、前記レベリングロールユニットにおける前記板材の入側および出側にそれぞれ設けられ、前記レベリングロールを介して前記板材を押圧する押圧シリンダと、前記レベリングロールをバックアップする複数のバックアップロールと、前記レベリングロールを回転させて前記板材を通板させる駆動機構と、を具備し、前記方法は、
前記複数のレベリングロールのロール間ピッチPを矯正すべき前記板材の最大要求降伏応力および最大要求板厚で決定し、前記レベリングロールの直径Dを、0.5<D/P<0.9を満たす値として前記板材を矯正する板材の矯正方法。 - 通板ラインを通して板材を矯正するローラレベラにより前記板材を矯正する板材の矯正方法であって、
前記ローラレベラは、
前記通板ラインの上下に千鳥状に配置され、前記板材を挟んで矯正しつつ前記板材を通板させるように回転する複数のレベリングロールを有するレベリングロールユニットと、
前記複数のレベリングロールを上下にバックアップする複数のバックアップロールと、
前記レベリングロールおよび前記バックアップロールをこれらの上下で支持する一対のロールフレームと、
前記一対のロールフレームを上下で支持する一対のフレームと、
前記レベリングロールユニットにおける前記板材の入側および出側にそれぞれ設けられ、前記一対のフレームの一方である作動フレームを前記通板ラインに向けて押圧し、前記ロールフレームの対応する一方を介して前記レベリングロール間で前記板材を押圧する押圧シリンダと、
前記レベリングロールを回転させる駆動機構と、
前記作動フレームと前記ロールフレームの前記対応する一方との間に、前記板材の通板方向に直交する幅方向に沿って複数取り付けられた油圧式クラウニングシリンダと、
を具備し、
前記方法は、
前記複数のレベリングロールのロール間ピッチPを矯正すべき前記板材の最大要求降伏応力および最大要求板厚で決定し、前記レベリングロールの直径Dを、0.5<D/P<0.9を満たす値とし、
かつ、前記一対のフレームの幅方向における横撓み量を求め、この撓み量を解消するに必要な前記油圧式クラウニングシリンダのそれぞれの必要締め込み量を算出し、前記必要締め込み量に基づいて前記油圧式クラウニングシリンダのそれぞれを締め込み制御する板材の矯正方法。 - 前記押圧シリンダ、前記油圧式クラウニングシリンダ、前記一対のロールフレーム、前記バックアップロール、前記レベリングロールの圧縮変形情報に基づいて、この圧縮変形を解消するに必要な前記油圧式クラウニングシリンダのそれぞれの必要締め込み量を算出し、この必要締め込み量と前記一対のフレームの撓み量を解消するに必要な必要締め込み量の合計値に基づいて前記油圧式クラウニングシリンダのそれぞれを締め込み制御する請求項12に記載の板材の矯正方法。
- 前記板材の厚さに応じて、前記板材が前記レベリングロールユニットの上下のレベリングロール間に噛込む限界の押込量である噛込限界押込量と、前記噛込限界押込量に制御すべき前記板材先端の移動距離である噛込補正制御距離とを設定した噛込補正テーブルに基づき、前記入側の押圧シリンダの前記板材の矯正に必要な設定押込量が前記噛込限界押込量よりも大きい場合に、前記板材の先端が前記噛込補正制御距離に達するまでは前記入側の押圧シリンダの押込量を前記噛込限界押込量に制限し、前記板材の先端が前記噛込補正制御距離に達した際に前記入側の押圧シリンダの押込量が前記設定押込量になるようにする請求項11から請求項13のいずれか1項に記載の板材の矯正方法。
- 前記噛込補正テーブルには、さらに前記板材の先端が前記噛込補正制御距離に達した際に前記入側の押圧シリンダの押込量を前記設定押込量にする際の押圧速度が設定され、前記噛込補正テーブルに基づいて、前記入側の押圧シリンダの押込量が前記噛込限界押込量から前記設定押込量に変更する際の押圧速度を制御する請求項14に記載の板材の矯正方法。
- 前記直径Dと前記ピッチPとが、0.55<D/P<0.8を満たすようにする請求項11から請求項15のいずれか1項に記載の板材の矯正方法。
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EP2815817A1 (en) | 2014-12-24 |
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