WO2016185583A1 - Dispositif de réglage de largeur de tôle aux extrémités avant et arrière - Google Patents

Dispositif de réglage de largeur de tôle aux extrémités avant et arrière Download PDF

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Publication number
WO2016185583A1
WO2016185583A1 PCT/JP2015/064453 JP2015064453W WO2016185583A1 WO 2016185583 A1 WO2016185583 A1 WO 2016185583A1 JP 2015064453 W JP2015064453 W JP 2015064453W WO 2016185583 A1 WO2016185583 A1 WO 2016185583A1
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WIPO (PCT)
Prior art keywords
edger
leading end
width
pass
rolling
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PCT/JP2015/064453
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English (en)
Japanese (ja)
Inventor
真康 関本
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東芝三菱電機産業システム株式会社
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Application filed by 東芝三菱電機産業システム株式会社 filed Critical 東芝三菱電機産業システム株式会社
Priority to PCT/JP2015/064453 priority Critical patent/WO2016185583A1/fr
Priority to CN201580080162.3A priority patent/CN107614134B/zh
Priority to JP2017518685A priority patent/JP6428932B2/ja
Priority to TW104125074A priority patent/TWI587936B/zh
Publication of WO2016185583A1 publication Critical patent/WO2016185583A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling

Definitions

  • This invention relates to a leading edge plate width control device.
  • the present invention relates to a leading end plate width control device for controlling a reversible rolling mill equipped with an edger.
  • a metal slab that is a material to be rolled is rolled in a hot rolling line so as to have a desired product size and material.
  • the hot rolling line includes a reversible rolling mill and a finish rolling mill.
  • the reversible rolling mill rolls the material to be rolled to a size required for finish rolling in a downstream finish rolling mill.
  • the finish rolling mill rolls the material to be rolled to the target product size.
  • a reversing rolling mill of a hot rolling line is a pair of vertical rolls (Vertical Roll) that performs width rolling on a material to be rolled, and an edger roll that is provided downstream of the edger roll and is horizontal to the material to be rolled. It has a pair of horizontal rolls (HorizontalHorizonRoll) for rolling.
  • the reversible rolling mill has a forward path for passing the material to be rolled from the upstream side (continuous casting machine side, heating furnace side) to the downstream side (finishing mill side) and the material to be rolled from the downstream side to the upstream side. Repeat the reverse path to pass. By repeating the forward pass and the reverse pass alternately, width rolling by a vertical roll (hereinafter also referred to as edger roll) and horizontal roll horizontal rolling are performed on the material to be rolled.
  • Width rolling by edger rolls is the uniform temperature of the material to be rolled before the finish rolling process, the realization of width dimensions corresponding to various target plate widths, and the temperature formed in the heating stage of the material to be rolled in the heating furnace. This is performed to suppress fluctuations in the plate width due to differences (skid marks) and unsteady deformation of the leading end.
  • the active processing in the width direction (short direction) of the material to be rolled is performed only by a reversible rolling mill, it is one of important processes. In general, a reversible rolling mill repeats multiple times that width rolling and horizontal rolling are performed only in the forward pass and only horizontal rolling is performed in the reverse pass.
  • the longitudinal cross-section in the width direction (short direction) of the rolled material is a dog-shaped bone (dogbone) that is raised in the thickness direction at the end in the width direction. Shape).
  • this dogbone is rolled back in the thickness direction to return in the width direction (width return due to the dogbone), and spread in the width direction by horizontal rolling (width expansion by horizontal rolling) ).
  • a material to be rolled wider than the gap between the pair of edger rolls is formed.
  • Non-Patent Document 1 is directed to a steady portion (a portion other than the leading end portion of the material to be rolled) that does not rapidly change in the longitudinal direction.
  • sheet width control (edgeer opening degree change control of edger) that widens edger roll gap compared to steady part other than the leading edge only for the leading edge of the material to be rolled ) Is done.
  • the edger roll gap opening / closing operation amount (edger leading edge opening changing amount) in the conventional edger leading edge opening changing control is the edger positive path leading edge opening changing pattern.
  • the generation unit 16 sets the value based on a mathematical expression or a pattern stored as a numerical table (edge edge opening degree change pattern of the edger). When setting based on the pattern stored as a numerical table, the stored pattern is searched using the steel type, sheet width, width reduction amount, sheet thickness, and the like as search keys.
  • the number table is generally determined by trial and error.
  • Width reduction in hot rolling includes width reduction by a sizing press that performs width reduction by a pair of press tools, in addition to width rolling by edger rolls.
  • the width reduction by the sizing press has been increasingly adopted due to the feature that the reduction efficiency is good because the contact length with the material to be rolled can be increased during the width reduction, and that a large width reduction can be expected, and the demand in the steel industry in recent years.
  • the introduction and installation of the sizing press requires a space and a financial margin, there is a demand for realizing a significant reduction only by the width rolling by the edger roll.
  • Patent Document 1 discloses that, in a reversible rolling mill having a configuration in which two vertical rolls are arranged with a horizontal roll interposed therebetween, significant reduction is realized by repeating width rolling in a forward pass and a reverse pass. Yes.
  • Patent Document 1 is a technique for suppressing the occurrence of a fishtail in which the tip end of the material to be rolled has a fish-tail shape, and no mention is made of improving the accuracy of the tip end plate width.
  • Patent Document 1 requires two vertical rolls across a horizontal roll, and does not support width rolling in the forward pass and the reverse pass using only one vertical roll.
  • width rolling in the forward pass width rolling in the forward pass, and horizontal rolling in the forward pass (that is, horizontal rolling after continuous width rolling in the reverse pass and the forward pass)
  • the edger opening degree change control of the edger is applied only in the width rolling in the forward pass, and the edger opening degree change control of the edger is not applied in the width rolling in the reverse pass.
  • the tail end plate width after width rolling in the reverse path without applying the edger tip end opening change control is almost equal to the plate width of the steady portion, but the tip plate width is narrower than the steady portion. (This is referred to as width reduction). That is, the tip plate width of the material to be rolled is formed unevenly.
  • the width rolling is performed while the dog bone formed by the width roll in the reverse pass and the width drop of the tip portion remain.
  • the width rolling is performed by applying the conventional edge end opening change pattern of the edger, the width of the leading end plate of the material to be rolled is formed more unevenly. That is, when width rolling is continuously performed in the reverse pass and the forward pass, it is necessary to perform some correction on the leading edge opening change pattern of the edger.
  • the present invention has been made to solve the above-described problems.
  • the edge end opening change pattern of the edger is rationally determined, and the optimum edger is determined. It is an object of the present invention to provide a leading end plate width control device capable of performing width control by a leading end opening change pattern.
  • the leading edge plate width control device is configured as follows.
  • the leading end plate width control device controls the reversible rolling mill.
  • the reversible rolling mill includes an edger having a pair of vertical rolls that perform width rolling on a material to be rolled on a rolling line, and a pair of horizontal rolls that are provided downstream of the vertical roll and perform horizontal rolling on the material to be rolled. Is provided.
  • the reversible rolling mill repeats a forward path through which the material to be rolled passes from the upstream side to the downstream side of the reversible rolling mill and a reverse path through which the material to be rolled passes from the downstream side to the upstream side. Perform both rolling and horizontal rolling.
  • the leading end plate width control device includes a tracking unit, a path schedule calculating unit, a reverse path leading end opening changing pattern generating unit, a normal path leading end opening changing pattern generating unit, a reverse path distribution ratio calculating unit, an edger normal correcting unit.
  • a path leading end opening changing pattern correcting unit and an edger leading end opening controlling unit are provided.
  • the tracking means tracks the position of the material to be rolled on the rolling line.
  • the pass schedule calculation means calculates the width reduction amount that is the difference between the edger entry side plate thickness, edger entry side plate width, edger exit side plate width, edger entry side plate width and edger exit side plate width in each pass.
  • the roll gap of a pair of vertical rolls is calculated.
  • the reverse path leading end opening change pattern generating means Based on the calculated value calculated by the path schedule calculating means, the reverse path leading end opening change pattern generating means generates an edger reverse path leading edge in the i-1th path (i is an odd number of 3 or more) as a reverse path.
  • the end opening change pattern is output.
  • the edger reverse path leading end opening change pattern the roll gap of the vertical roll at the leading end of the material to be rolled is set wider than the roll gap at the steady portion other than the leading end.
  • the edger reverse pass leading end opening change pattern is set so that the plate width of the leading end portion of the material to be rolled after reverse pass rolling is not smaller than the plate width of the steady portion.
  • the positive path leading end opening change pattern generating unit outputs an edger positive path leading end opening changing pattern in the i-th pass, which is the normal path, based on the calculated value calculated by the path schedule calculating unit.
  • the roll gap of the vertical roll at the leading end of the material to be rolled is set wider than the roll gap at the stationary part other than the leading end.
  • the reverse path distribution ratio calculation means calculates the reverse path distribution ratio by dividing the width reduction amount of the i-1th path calculated by the path schedule calculation means by the width reduction amount of the i th path.
  • the edger forward path leading end opening change pattern correcting means includes a calculated value calculated by the path schedule calculating means, a reverse path distribution ratio calculated by the reverse path distribution ratio calculating means, and a material to be rolled calculated by the tracking means. Based on the position tracking information, the edger positive path leading end opening change pattern is corrected.
  • the edger leading end opening control means is configured to calculate the leading end of the material to be rolled based on the edger reverse path leading end opening changing pattern, the corrected edger forward path leading end opening changing pattern, and the position tracking information.
  • the roll gap of a pair of vertical rolls in the section is output.
  • the edger changes the roll gap of the vertical roll based on the roll gap output from the edger leading end opening control means.
  • the leading end plate width control device includes learning means.
  • a tracking means acquires the board width actual value which the board width meter provided in the downstream of the reversible rolling mill measured for every position of the to-be-rolled material.
  • the learning means corrects the corrected edger positive path leading end opening change pattern so that the deviation between the actual board width value measured by the board width meter and the target board width value becomes zero.
  • the edge end opening change pattern of the edger in a reversible rolling mill provided with a vertical roll only upstream of a horizontal roll, can be rationally determined for width rolling in the forward pass after the reverse pass, It is possible to perform width control by an optimum edger leading end opening change pattern. As a result, the accuracy of sheet width control in continuous width rolling in the reverse pass and the forward pass is improved, and a significant reduction is possible, and products with various target dimensions can be manufactured with high product dimensional accuracy. Moreover, the frequency
  • FIG. It is a figure for demonstrating the outline of the reversible rolling mill of a hot rolling line, and the structure of the leading end board width control apparatus which controls an edger roll gap. It is a figure for demonstrating the edger positive path front end opening degree change pattern correction means 19.
  • FIG. It is a top view for demonstrating the example which applied the edger reverse path leading end opening change pattern at the time of width rolling by a reverse path. It is a top view for demonstrating the example which applied the edger normal path leading end opening change pattern after correction
  • FIG. 1 is a diagram for explaining the outline of a reversible rolling mill for a hot rolling line and the configuration of a leading end plate width control device for controlling an edger roll gap.
  • the hot rolling line includes a reversible rolling mill 1.
  • the hot rolling line includes a continuous casting machine and a heating furnace on the upstream side of the reversible rolling mill 1, and a finish rolling mill on the downstream side of the reversible rolling mill 1 (not shown).
  • the continuous casting machine casts a metal slab according to the set width dimension.
  • the metal slab that is the material to be rolled 5 is rolled in a hot rolling line so as to have a desired product size and material.
  • the reversible rolling mill 1 rolls the material to be rolled 5 to a size necessary for finish rolling by a downstream finish rolling mill.
  • the finish rolling mill rolls the material to be rolled 5 to a target product size.
  • the reversible rolling mill 1 includes an edger 2 and a horizontal mill 3.
  • the edger 2 includes a pair of vertical rolls (edger rolls) that perform width rolling on the material to be rolled 5.
  • FIG. 1 shows the edger roll of the edger 2.
  • the horizontal mill 3 is provided downstream of the edger 2 and includes a pair of horizontal rolls that perform horizontal rolling on the material to be rolled 5.
  • FIG. 1 shows a horizontal roll of the horizontal mill 3.
  • the edger 2 includes a hydraulic cylinder controlled by a hydraulic control device (HPC) 4.
  • the roll gap (edger roll gap) of the pair of edger rolls of the edger 2 can be opened and closed (wide or narrow) in the width direction of the material to be rolled 5 according to the operation of the hydraulic cylinder.
  • HPC hydraulic control device
  • the reversible rolling mill 1 has a forward path 7 (in the same direction as the conveying direction 6) that allows the material to be rolled 5 to pass from the upstream side (continuous casting machine side, heating furnace side) to the downstream side (finishing mill side) of the reversible rolling mill 1. ), And the reverse path 8 (the reverse direction to the normal path 7) for passing the material to be rolled 5 from the downstream side to the upstream side is repeated.
  • the reversible rolling mill 1 performs both width rolling and horizontal rolling in each of the forward pass and the reverse pass.
  • the material 5 to be rolled is rolled by the reversible rolling machine 1 (the total number of passes is N. N is an odd number equal to or greater than 3) and then provided on the downstream side (conveying direction 6) of the reversible rolling machine 1. It is conveyed to the finishing mill.
  • the front part of the advancing direction of the to-be-rolled material 5 is called a front-end
  • the left side of the edger 2 is referred to as an edger entry side
  • the right side is referred to as an edger exit side.
  • the right side of the edger 2 is referred to as the edger entry side, and the left side is referred to as the edger exit side.
  • the left side of the reversible rolling mill 1 is referred to as the upstream side and the right side is referred to as the downstream side, regardless of the normal path and the reverse path.
  • a roller table speed detector 9 and a hot piece detector (HMD) 10 are provided in front of the material to be rolled 5 entering the edger 2 and the horizontal mill 3 through the forward path 7 (upstream side of the edger 2). .
  • the roller table speed detector 9 detects the rotational speed of the roller table that conveys the material to be rolled 5 in the hot rolling line.
  • the hot piece detector 10 detects the material to be rolled 5 being conveyed.
  • the horizontal mill 3 is provided with a rotation speed detector 11 for detecting the rotation speed of the horizontal roll.
  • the tracking means 12 tracks the position of the material 5 to be rolled on the hot rolling line based on signals from the roller table speed detector 9, the hot piece detector 10, and the rotation speed detector 11. Specifically, the tracking unit 12 generates position tracking information including the traveling direction of the material to be rolled and the conveyance position.
  • a plate width gauge 13 is provided on the downstream side of the horizontal mill 3.
  • the sheet width meter 13 measures the actual sheet width after rolling (after rolling the N pass in the reversible rolling mill 1).
  • the tracking means 12 acquires the actual board width value measured by the board width meter 13.
  • the present invention is applicable even if the position and number of these sensors do not necessarily match those in FIG.
  • the edger 2 is controlled by the leading end plate width controller 21.
  • the leading edge plate width control device 21 includes a tracking means 12, a path schedule calculating means 14, an edger forward path leading edge opening change pattern generating means 16a, an edger reverse path leading edge opening changing pattern generating means 16b, and a reverse path.
  • the distribution ratio calculating means 18, the edger positive path leading and trailing edge opening changing pattern correcting means 19, the learning means 20, and the edger leading and trailing edge opening degree controlling means 17 are provided.
  • the leading end plate width control device 21 may include the HPC 4.
  • the pass schedule calculation means 14 determines the edger entry side plate thickness, the edger entry side plate width, the edger exit side plate width, the width reduction amount, and the gap between the pair of vertical rolls of the edger 2. (Edger roll gap) is calculated.
  • the width reduction amount [mm] is a difference between the edger entrance side plate width and the edger exit side plate width in each pass.
  • the size [mm] of the edger roll gap is a distance between rolls in a pair of edger rolls, and is also referred to as an opening degree in this specification.
  • the path schedule calculation unit 14 receives the hot rolling instruction information 15 from the host computer.
  • the hot rolling instruction information 15 includes information on the dimensions and steel types of the material to be rolled 5 before rolling, and information on target dimensions of the material to be rolled 5 after rolling (downstream of the reversible rolling mill 1 after N passes). .
  • the pass schedule calculating means 14 is based on the hot rolling command information 15 so that a product having a predetermined product size can be manufactured. Calculate the roll rotation speed and edger roll gap.
  • the pass schedule calculation means 14 calculates the target values of the edger entry side plate thickness, the edger entry side plate width, the edger exit side plate width, and the width reduction amount of the material 5 to be rolled for each pass.
  • the edger roll gap (opening degree) in each pass is based on, for example, the plate thickness and width of the material to be rolled 5 before rolling and the target plate width after rolling (after N passes). Is calculated.
  • the edger roll gap calculated by the pass schedule calculation unit 14 is a value corresponding to the target plate width of the steady portion (a portion other than the leading end) of the material 5 to be rolled in a predetermined pass.
  • the edger forward path leading end opening change pattern generating unit 16a generates an edger forward path leading end opening changing pattern to bring the leading end close to the target plate width, and the edger reverse path leading end opening degree pattern is generated.
  • the change pattern generation means 16b generates an edger reverse path leading end opening change pattern.
  • the edger forward path leading end opening change pattern generating unit 16a and the edger reverse path leading end opening changing pattern generating unit 16b are predetermined parameters (for example, a steel type included in the hot rolling command information, a path schedule calculating unit 14).
  • a numerical table for storing the edge end opening change pattern of the edger corresponding to the calculated thickness (sheet thickness, sheet width, width reduction amount before rolling) of the material to be rolled 5 is stored.
  • the edger positive path leading end opening changing pattern generating unit 16a searches the edger for the leading edge opening changing pattern of the edger corresponding to the predetermined parameter from the numerical table, and sets it as the edger positive path leading end opening changing pattern.
  • the edger reverse path leading end opening change pattern generating unit 16b searches the edger leading end opening changing pattern corresponding to the predetermined parameter from the numerical table, and the edger reverse path leading end opening changing pattern is obtained.
  • the leading edge opening change pattern of the edger is not necessarily retrieved from the numerical table, and may be calculated based on a mathematical expression.
  • the roll gap of the vertical roll at the leading end of the material to be rolled is set wider than the roll gap at the stationary part other than the leading end.
  • the edger reverse pass leading end opening change pattern is set so that the plate width of the leading end portion of the material to be rolled after reverse pass rolling is not smaller than the plate width of the steady portion. That is, the width is set so as not to drop.
  • the roll gap of the vertical roll at the leading end of the material to be rolled is set wider than the roll gap at the stationary part other than the leading end.
  • the edger leading end opening control means 17 sends a control signal to the HPC 4 for each position of the material to be rolled 5 so that the edger roll gap is changed according to the edger leading end opening changing pattern.
  • the edger leading end opening control means 17 is a rolling material 5 obtained from the data obtained by adding the edger leading end opening changing pattern to the edger roll gap calculated by the path schedule calculating means 14 and the position tracking information. Based on this position, a control signal for changing the edger roll gap according to the position of the material to be rolled 5 is output.
  • the HPC 4 operates the hydraulic cylinder according to the control signal and changes the edger roll gap of the edger 2.
  • the leading end plate width control device 21 includes a reverse path distribution ratio calculating unit 18 and an edger forward path leading end opening changing pattern correcting unit 19 in addition to the above-described configuration.
  • FIG. 3 is a top view for explaining an example in which an edger reverse path leading end opening change pattern is applied during width rolling in the reverse path.
  • a broken line 31 shows a pattern in which the edger roll gap is constant (the edger roll gap is fixed to a value corresponding to the target plate width of the stationary part).
  • a solid line 32 shows an edger reverse path leading end opening change pattern. If the edger roll gap is constant during the width rolling in the reverse pass, as shown by the broken line 33, the plate width of the tail end after the reverse pass rolling is substantially equal to the plate width of the steady portion, but the tip portion Falls off.
  • edger reverse path leading end opening change pattern By applying the edger reverse path leading end opening change pattern, the width drop caused by width rolling in the reverse path is suppressed. However, an unsteady dogbone shape due to the spread of the material to be rolled 5 in the longitudinal direction still exists at the leading end.
  • the edger forward pass leading end opening change pattern is considered in consideration of the width reduction amount distribution ratio (reverse path distribution ratio) between the passes that are continuously subjected to width rolling in the reverse pass and the forward pass. to correct.
  • the pass schedule calculation unit 14 calculates the width reduction amount ratio (width reduction amount distribution ratio) of each pass using Equation 1.
  • ⁇ B Ei is the width reduction amount in the i-th path (1 ⁇ i ⁇ N, i is a natural number) by the edger 2
  • ⁇ Ei is the width reduction distribution ratio in the i path. It is.
  • ⁇ Ei is predetermined as a target ratio.
  • the reverse path distribution ratio calculation means 18 divides the width reduction amount of the i-1th path, which is the reverse path calculated by the path schedule calculation means 14, by the width reduction amount of the i-th path, which is the normal path, and reverse path distribution. Calculate the ratio. Specifically, the reverse path distribution ratio calculation unit 18 calculates the reverse path distribution ratio ⁇ rev_n using Equation 2.
  • the edger forward path leading end opening change pattern correcting unit 19 includes the reverse path distribution ratio calculated by the reverse path distribution ratio calculating unit 18 and the edger generated by the edger forward path leading end opening changing pattern generation unit 16a.
  • Front pass leading end opening change pattern (hereinafter also referred to as reference leading end opening changing pattern), strip width before rolling in the reverse pass (target value), strip width after rolling in the forward pass (target value) ) Based on the position tracking information of the material 5 to be rolled, the reference leading end opening change pattern is corrected.
  • FIG. 2 is a diagram for explaining the edger positive path leading end opening changing pattern correcting means 19.
  • the reverse / normal path determination processing 191 determines whether or not the width rolling is continuously performed in the reverse path and the normal path based on the calculated value calculated by the path schedule calculation unit 14 and the position tracking information. .
  • the reverse / normal pass total width reduction amount calculation processing 192 is performed when the width rolling is continuously performed in the reverse pass and the normal pass, and the width (target value) before rolling in the reverse pass and the width in the normal pass.
  • the total width reduction amount ⁇ B Total when the width rolling is continuously performed in the reverse pass and the normal pass is calculated from the sheet width (target value) after the rolling using the following formula 3.
  • B i-1 Sheet width before rolling in reverse pass
  • B Ei Sheet width after width reduction in forward pass
  • Edger forward pass leading end opening change pattern correction ratio calculation processing 193 is performed by discriminating between the reverse pass and the forward pass, the total width reduction amount ⁇ B Total, and the plate before reverse pass rolling calculated by the pass schedule calculation means 14. Using the reverse path distribution ratio ⁇ rev — n calculated by the width and reverse path distribution ratio calculation means 18, the edger forward path leading end opening change pattern correction ratio is calculated.
  • the edger forward pass leading end opening change pattern correction ratio ⁇ fwd is given by the following equation using the total width reduction amount ⁇ B Total , the reverse pass distribution ratio ⁇ rev — n , and the plate width B i-1 before reverse pass rolling as variables. It is done.
  • the edger positive path leading edge opening change pattern correction amount calculation processing 194 multiplies the reference leading edge opening changing pattern by the edger positive path leading edge opening changing pattern correction ratio ⁇ fwd to obtain the edger positive path opening A tail end opening change pattern correction amount is calculated.
  • the edger positive path leading end opening change pattern correction amount is corrected with the learning value.
  • the learning means 20 learns the deviation between the sheet width target value and the sheet width actual value at the leading end of the material to be rolled 5 based on the sheet width actual value and position tracking information measured by the sheet width meter 13.
  • Calculate as The edger positive path leading end opening change pattern correcting means 19 corrects the edger positive path leading end opening changing pattern correction amount using the learning value so that the deviation becomes zero.
  • the learning value is preferably stored for each combination of the total width reduction amount of the reverse path and the forward path and the plate width target value (learning value table).
  • the edger positive path leading end opening change pattern correction amount ⁇ S offset in which the learning value is reflected is expressed by Equation 7.
  • x Position of the material to be rolled (for example, each position where the material to be rolled 5 is divided in the longitudinal direction)
  • ⁇ S offset Edger positive path leading and trailing edge opening change pattern correction amount
  • ⁇ S basic Reference leading and trailing edge opening changing pattern
  • Z Act Learning value
  • the latest learning value Z Act NEW is calculated by updating the past learning value Z Act OLD using Equation 8.
  • the calculated edger positive path leading end opening change pattern correction amount is added to the reference leading end opening changing pattern to correct the edger positive path leading end opening changing pattern.
  • the corrected edger forward pass leading end opening change pattern after correction is a pattern suitable for horizontal rolling after width rolling continuously in the reverse pass and the forward pass.
  • the corrected edger positive path leading end opening change pattern is output to the edger leading end opening control means 17.
  • the edger leading end opening control means 17 sends a control signal to the HPC 4 for each position of the material to be rolled 5 so that the edger roll gap is changed according to the edger leading end opening changing pattern.
  • FIG. 4 is a top view for explaining an example in which an edger forward pass leading end opening change pattern after correction is applied during width rolling in the forward pass next to the reverse pass.
  • a broken line 41 indicates an edger positive path leading end opening change pattern before correction.
  • the solid line 42 shows the edger positive path leading end opening change pattern after correction.
  • a broken line 33 indicates the material to be rolled 5 that has been subjected to width rolling using a pattern in which the edger roll gap shown by the broken line 31 in FIG. 3 is constant.
  • width rolling using the pattern of the broken line 41 is performed on the material to be rolled 5 indicated by the broken line 33, the plate width of the leading end portion of the material to be rolled 5 becomes nonuniform as indicated by the broken line 43.
  • width rolling using the edger reverse path leading end opening change pattern is performed in the reverse path (solid line 34).
  • the rolled material 5 indicated by the solid line 34 is subjected to width rolling using a pattern that takes into account the reverse path distribution ratio indicated by the solid line 42.
  • the width dimension of the leading end of the material to be rolled 5 can be controlled with high accuracy.
  • the learning value Z Act calculated by the learning means 20 in Expression 7 is added, but the learning value Z Act may be excluded. That is, a configuration without the learning unit 20 may be used.
  • each part indicated by reference numerals 12 and 14 to 20 represents a function of the leading end plate width control device 21.
  • FIG. 5 is a diagram illustrating a hardware configuration of the leading end plate width control device 21.
  • the leading edge plate width control device 21 includes a circuit including, for example, a processor 50 and a memory 51 as hardware resources.
  • the leading end plate width control device 21 implements the functions of the units 12 and 14 to 20 by executing the program stored in the memory 51 by the processor 50.
  • the leading end plate width control device 21 may include a plurality of processors 50.
  • the leading end plate width control device 21 may include a plurality of memories 51. That is, a plurality of processors 50 and a plurality of memories 51 may cooperate to realize each function of each unit 12, 14 to 20. Some or all of the functions of the units 12, 14 to 20 may be realized by hardware.

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  • Control Of Metal Rolling (AREA)

Abstract

Selon la présente invention, un laminoir réversible (1) est pourvu de : une cage de refoulement (2) ayant une paire de rouleaux verticaux qui effectuent un laminage en largeur sur un matériau (5) à laminer disposé sur une ligne de laminage ; et une paire de rouleaux horizontaux qui sont disposés en aval des rouleaux verticaux et qui effectuent un laminage horizontal sur le matériau (5) à laminer. Le laminoir réversible (1) effectue un laminage en largeur et un laminage horizontal à la fois dans la passe vers l'avant et dans la passe inverse. Le dispositif de réglage de largeur de tôle aux extrémités avant et arrière (21) est pourvu d'un moyen de calcul (18) de taux de répartition sur la passe inverse, d'un moyen de correction (19) de profil de changement de niveau ouvert aux extrémités avant et arrière de la passe vers l'avant de la cage de refoulement et d'un moyen de réglage (17) de niveau ouvert aux extrémités avant et arrière de la cage de refoulement. Le moyen de calcul (18) de taux de répartition sur la passe inverse calcule un taux de répartition sur la passe inverse par division de la hauteur de la réduction de la largeur dans la passe inverse par la hauteur de la réduction de la largeur dans la passe vers l'avant suivante. Le moyen de correction (19) de profil de changement de niveau ouvert aux extrémités avant et arrière de la passe vers l'avant de la cage de refoulement corrige un profil de changement de niveau ouvert aux extrémités avant et arrière de la passe vers l'avant de la cage de refoulement sur la base du taux répartition sur la passe inverse. Le moyen de réglage (17) de niveau ouvert aux extrémités avant et arrière de la cage de refoulement règle un espace entre les rouleaux de la cage de refoulement (2) sur la base du profil de changement de niveau ouvert aux extrémités avant et arrière de la passe vers l'avant de la cage de refoulement corrigé.
PCT/JP2015/064453 2015-05-20 2015-05-20 Dispositif de réglage de largeur de tôle aux extrémités avant et arrière WO2016185583A1 (fr)

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PCT/JP2015/064453 WO2016185583A1 (fr) 2015-05-20 2015-05-20 Dispositif de réglage de largeur de tôle aux extrémités avant et arrière
CN201580080162.3A CN107614134B (zh) 2015-05-20 2015-05-20 前后端板宽度控制装置
JP2017518685A JP6428932B2 (ja) 2015-05-20 2015-05-20 先尾端板幅制御装置
TW104125074A TWI587936B (zh) 2015-05-20 2015-08-03 前尾端板寬控制裝置

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JP7215396B2 (ja) * 2019-11-06 2023-01-31 東芝三菱電機産業システム株式会社 圧延材の板幅設定装置
CN116806174A (zh) * 2021-12-24 2023-09-26 东芝三菱电机产业系统株式会社 尾端挤压抑制装置
CN114653759B (zh) * 2022-04-01 2023-12-12 浙江水利水电学院 基于轧制力控制的热轧带钢宽度调节装置及方法

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TWI587936B (zh) 2017-06-21
JP6428932B2 (ja) 2018-11-28

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