JP2018176252A - Shape control device and shape control method of material to be rolled, and manufacturing method of metal thin plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shape control device and a shape control method of a material to be rolled and a manufacturing method of a metal thin plate which can suppress shape failure caused by misalignment of rolls arranged in the outlet side of a rolling mill.SOLUTION: A shape control device 1 comprises: a target shape correction part 2 calculating an elongation difference rate Δε between one side of a material S to be rolled in a plate width direction and the other side thereof on the basis of levelness and orthogonality of rolls 21-21and tension reels 22a, 22b measured in advance and correcting a target shape of the material S to be rolled set in advance on the basis of the calculated elongation difference rate Δε; a shape meter 3 measuring the shape of the material S to be rolled; a shape deviation calculation unit 4 calculating a shape deviation of the material to be rolled which is a deviation between the shape measurement value measured by the shape meter 3 and the target shape corrected by the target shape correction part 2; and a controller 5 controlling operation amount of a work roll bender 13a, 13b and leveling amount of a rolling device 14 on the basis of the calculated shape deviation of the material S to be rolled.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shape control device and a shape control method of a material to be rolled such as a thin metal plate, and a method of manufacturing a thin metal plate using the shape control method.

  Conventionally, in the cold rolling process of a material to be rolled such as a thin metal plate, the shape of the material to be rolled during cold rolling is controlled in order to suppress shape defects such as ear waves and medium elongation of the material to be rolled. There is. In the shape control of the material to be rolled during cold rolling, the material to be rolled is attached by a shape gauge attached between a cold rolling mill for cold rolling the material to be rolled and a tension reel for winding the material to be rolled. Measure the shape of Then, feedback control of the operation amount and the leveling amount of the work roll bender is generally performed so as to eliminate the deviation between the measured shape and the target shape of the measured material to be rolled.

  Here, the work roll bender is an apparatus provided for each work roll of a cold rolling mill, and bending the work roll to change the ear wave and the medium elongation of the material to be rolled. In addition, leveling is a method of changing the elongation of the material to be rolled by applying a load difference to both ends of the backup roll in a hydraulic pressure reduction device that applies a load to both ends of the backup roll of a cold rolling mill to apply rolling load. It is. In addition, a shape meter is often a contact type in which rolls in which load cells are embedded are combined at intervals of several tens of mm, and utilizing the fact that the load on the shape meter changes due to the elongation of the material to be rolled, The shape of the material to be rolled in the plate width direction is detected.

Here, as a conventional plate shape control method of thin plate rolling, for example, the method shown in Patent Document 1 is known.
The plate shape control method of thin plate rolling shown in Patent Document 1 calculates the operation amount that minimizes the deviation between the target shape and the actual shape, and controls the distribution of the shape deviation in the plate width direction, in the plate width direction. It is intended not to generate a local location where the difference in elongation rate is large.

JP 2001-314909 A

However, in the plate shape control method of thin plate rolling shown in the conventional Patent Document 1, there are the following problems.
That is, it is general that many rolls, such as a deflector roll and a pass line roll, are arranged at the exit side of the cold rolling mill which cold-rolls the material to be rolled. In the case of the plate shape control method of thin plate rolling shown in Patent Document 1, when misalignment occurs in these rolls, that is, when the rolls are inclined in the vertical and horizontal directions with respect to the rolling line direction, the target shape and the actual shape Even when there was no deviation of the shape of the material to be rolled, a defect in shape occurred. When the roll is inclined in the direction perpendicular and horizontal to the rolling line direction, the pass line lengths at both ends in the width direction of the material to be rolled differ and the end of the material to be rolled on the side with the longer pass line length is elastic. Thus, the tension at the end with the long pass line length is high. As a result, the load received from the material to be rolled of the shape meter becomes high at the end on the side where the pass line length is long, and it is recognized that the shape meter does not extend further. According to the plate shape control method of thin plate rolling shown in Patent Document 1, by controlling the work roll bending mechanism based thereon, even if there is no deviation between the target shape and the actual shape, the shape after control becomes the target shape Since the shape is different, a shape defect has occurred.

  Therefore, the present invention has been made to solve the conventional problems, and its object is to suppress shape defects caused by misalignment of rolls disposed on the outlet side of a rolling mill. An object of the present invention is to provide a shape control device and a shape control method of a material to be rolled, and a method of manufacturing a thin metal sheet using the shape control method.

  In order to achieve the above object, a shape control device of a material to be rolled according to an aspect of the present invention is a tension reel that rolls a material to be rolled rolled by a rolling mill via a roll disposed on the outlet side of the rolling mill. The shape control device of a material to be rolled applied to a rolling line wound up with one side, and one side of the material to be rolled in the width direction of the material based on the level and orthogonality of the roll and the tension reel measured in advance. And a target shape correction unit for calculating a target difference between a predetermined value of the material to be rolled, which is calculated based on the calculated differential elongation difference, and the above-mentioned rolled by the rolling mill. A shape gauge for measuring the shape of the material to be rolled, and a shape deviation for calculating the shape deviation of the material to be rolled which is the deviation between the shape measurement value measured by the shape meter and the target shape corrected by the target shape correction unit Calculation unit and calculation of the shape deviation And summarized in that and a control unit for controlling the leveling amount by the operation amount and the reduction device of a work roll bender provided in the rolling mill on the basis of the shape deviation of the rolled material calculated by.

Moreover, the shape control method of the material to be rolled according to another aspect of the present invention is a rolling line in which the material to be rolled rolled by a rolling mill is wound by a tension reel via a roll disposed on the outlet side of the rolling mill. The shape control method of a material to be rolled applied to the present invention, the elongation of one side and the other side of the material to be rolled in the plate width direction based on the levelness and orthogonality of the roll and the tension reel measured in advance. Difference ratio difference is calculated, and based on the calculated difference in elongation difference ratio, the target shape of the material to be rolled set in advance is corrected, and the difference between the shape measurement value measured by the shape meter and the corrected target shape Calculating the shape deviation of the material to be rolled, and controlling the operation amount of the work roll bender provided in the rolling mill and the leveling amount by the reduction device based on the calculated shape deviation of the material to be rolled. Do.
Moreover, the manufacturing method of the thin metal plate which concerns on another aspect of this invention makes it a summary to use the shape control method of the said to-be-rolled material.

  According to the shape control device and shape control method of a material to be rolled according to the present invention, shape control of a material to be rolled which can suppress shape defects caused by misalignment of rolls disposed on the outlet side of a rolling mill An apparatus and a shape control method can be provided. Moreover, according to the method of manufacturing a thin metal plate according to the present invention, a method of manufacturing a thin metal plate closer to a target shape can be provided.

It is a schematic block diagram of a part of cold rolling line to which the shape control device of the material to be rolled concerning one embodiment of the present invention is applied. Explains the levelness and orthogonality of the roll, and the height difference and distance difference of the roll, and (A) explains the levelness and height difference of the roll viewed from the front side of the traveling material to be rolled FIG. 6B is a view for explaining the degree of orthogonality of the rolls and the difference in distance, as viewed from the flat side of the material to be rolled. The pass line of the to-be-rolled material which passes the n-1st roll and the n-th roll in the cold-rolling line shown in FIG. 1 is shown, (A) shows that the to-be-rolled material is the upper side of the n-1st roll and n The pass line passing below the second roll, (B) is the pass line where the rolled material passes above the n-1st roll and above the nth roll, (C) is the rolled material where the rolled material is n Pass line passing below the -1st roll and above the nth roll, (D) is a pass where the rolled material passes below the n-1st roll and below the nth roll Line is shown. It is a flowchart which shows the arithmetic processing flow of the arithmetic processing unit which comprises the target shape correction | amendment part of a shape control apparatus, a shape deviation calculation part, and a control part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, although a cold-rolling line is illustrated as an example of a rolling line below, this invention is not limited by this Embodiment. In addition, it should be noted that the drawings are schematic, and the dimensional relationship of each element, the ratio of each element, etc. may be different from the realistic one. Even between the drawings, there may be a case where portions having different dimensional relationships and ratios from one another are included.

First, FIG. 1 shows a part of a cold rolling line to which a shape control device of a material to be rolled according to an embodiment of the present invention is applied, and in the cold rolling line, a payoff reel (not shown) is shown. The material to be rolled S is dispensed from the mounted coil. Then, the material to be rolled S discharged from the coil is held by a plurality of rolls (not shown) and conveyed, and after being rolled by a cold rolling mill (rolling mill) 10, to the outlet side of the cold rolling mill 10 A plurality of (i) rolls are wound on the first tension reel 22a via a plurality of (i) rolls 21 _{1 to} 21 _i (path 1), or a plurality of (i) arranged on the outlet side of the cold rolling mill 10 The second tension reel 22b is configured to be taken up via +1) rolls 21 _{1 to} 21 _{i + 1} (path 2).

  Here, the cold rolling mill 10 includes a pair of upper and lower work rolls 11a and 11b that sandwich and hold the material S from above and below, and backup rolls 12a and 12b that support the work rolls 11a and 11b, respectively. There is. And in the cold rolling mill 10, a work roll is provided for each work roll 11a, 11b, and the work roll 11a, 11b is bent in the thickness direction to change the ear wave and middle elongation of the material S to be rolled. Vendors 13a and 13b are provided. The cold rolling mill 10 is a pressure reduction device that applies a load to both ends in the width direction of the backup rolls 12a and 12b, and provides a load difference at both ends in the width direction of the backup rolls 12a and 12b. A pressure reduction device 14 is provided which controls the gap 11 a and 11 b in the width direction and changes the elongation of the material S to be rolled.

The shape control device 1 of the material to be rolled S applied to the cold rolling line is disposed on the outlet side of the cold rolling mill 10 when the material to be rolled S is wound up along the path 1 In order to suppress shape defects caused by misalignment of the _first roll 21 _{1 to the} i-th roll 21 _i , when the material to be rolled S is taken up along the path 2, the outlet side of the cold rolling mill 10 The target shape correction unit 2 and the rolling performed by the cold rolling mill 10 in order to suppress shape defects caused by misalignment of the first rolls 21 _{1 to} i + 1st rolls 21 _{i + 1} arranged. A shape meter 3 for measuring the shape of the material to be rolled S, a shape deviation calculation unit 4, a control unit 5, and an input unit 6 are provided. The target shape correction unit 2, the shape deviation calculation unit 4, and the control unit 5 are configured by an arithmetic processing unit including a CPU, a ROM, a RAM, and the like.

Here, when the material to be rolled S is taken up along the path of the path 1, the target shape correction unit 2 measures the horizontalities α _{1 to} α _i of the _first roll 21 _{1 to} i-th roll 21 _i measured in advance. The plate of the material to be rolled S based on the orthogonality β _{1 to} β _i , the horizontality α _{TR 1} and orthogonality β _TR 1 of the first tension reel 22 a measured in advance, and other elongation difference percentage difference calculation conditions described later The difference in elongation difference rate Δε between one side and the other side in the width direction is calculated, and a preset target shape is corrected based on the calculated difference in elongation rate difference Δε. The target shape correction unit 2, when the rolled material S is wound in the path of the path 2, the first roll 21 1 _{through i} + 1 th 21 i _{+ 1} of the horizontal degree alpha ₁ to? Measured in advance _{Based on i + 1} and orthogonality β _{1 to} β _i , the horizontality α _{TR 2} and orthogonality β _{TR 2} of the second tension reel 22 b measured in advance, and other elongation difference percentage difference calculation conditions described later The difference in elongation difference ratio Δε between one side and the other side in the sheet width direction of the material S is calculated, and a preset target shape is corrected based on the calculated difference in elongation difference ratio Δε.

If this elongation difference percentage difference Δε is described, even if the material to be rolled S is completely flat, the shape difference 3 due to the elongation difference percentage difference Δε resulting from the misalignment of each of the rolls 21 _{1 to} 21 _{i + 1} The difference in elongation difference rate Δε is erroneously recognized as being a single extension from the actual shape. Therefore, the actual shape can be made closer to the target shape by correcting the difference in elongation percentage Δε from the target shape (the shape to be obtained).

A specific method of calculating the difference in elongation difference Δε between one side and the other side in the plate width direction of the material to be rolled S will be described below.
First, when misalignment each roll _{21 1 ~21 i +} 1 occurs, the rolls _{21 1 ~21 i +} 1 is inclined. As a result, the degree of horizontality and the degree of orthogonality of each of the rolls 21 _{1 to} 21 _{i + 1} that were initially set to zero become the degree of horizontality α _{1 to} α _{i + 1} and the degree of orthogonality β _{1 to} β _{i + 1} .

Here, levelness alpha _n of n-th roll 21 _n after leaving the cold rolling mill 10 is an n-th gradient in a direction perpendicular with respect to the rolling line direction of the roll 21 _n, in FIG. 2 (A) As shown, it can be expressed by the levelness α _n = δ _{1 n} / roll cylinder length. δ1 _n is the amount of vertical deviation of the end of the roll in the length direction, and the direction in which the DR side (drive side) of the roll 21 _n becomes higher is positive.
Also, direct degree beta _n of the n th roll 21 _n after leaving the cold rolling mill 10 is the slope of the horizontal direction with respect to the rolling line direction of the n-th roll 21 _n, shown in FIG. 2 (B) Thus, it can be expressed by orthogonality β _n = δ 2 _n / roll cylinder length. δ2 _n is the deviation of the roll length direction end of the roll in the rolling line direction, and the exit side in the rolling line direction is positive.

Levelness alpha ₁ to? _{I + 1} and direct degree beta ₁ ～Beta _{i + 1} from the first of these i + 1 th each roll ₂₁ of 1 through 21 _{i + 1} in advance before operating the cold rolling It is measured and input to the target shape correction unit 2 from the input unit 6 described later.
In addition, the horizontality α _TR1 and α _TR2 and the orthogonality β _TR1 and β _{TR2 of} the first and second tension reels 22a and 22b are also the difference in elongation difference ratio Δε between one side and the other side in the plate width direction of the material S Since it is necessary for calculation, it measures beforehand.

Here, the degree of _flatness α _TR1 and α _TR2 of the first and second tension reels 22a and 22b is the inclination in the direction perpendicular to the rolling line direction of the first and second tension reels 22a and 22 b, and the degree of _flatness α _TR1 = .delta.1 _TR1 / first tension reel body length, expressed in levelness α _TR2 = δ1 _TR2 / second tension reel body length. δ 1 _TR 1 is the amount of vertical deviation of the end of the first tension reel 22 a in the longitudinal direction, and the direction in which the DR side (drive side) of the first tension reel 22 a becomes higher is positive. Also .delta.1 _TR2 is shift amount in the vertical direction of the body length direction end portion of the second tension reel 22b, and a direction DR of the second tension reel 22b (drive side) is higher positive.

The orthogonalities β _TR1 and β _TR2 of the first and second tension reels 22a and 22b are inclinations in the horizontal direction with respect to the rolling line direction of the first and second tension reels 22a and 22b, and the orthogonality β _TR1 = δ 2 _TR 1 / The first tension reel cylinder length, orthogonality β _{TR 2} = δ _{2 TR 2} / The second tension reel cylinder length. beta _TR1 is the amount of deviation of the rolling line direction of the body length direction end portion of the first tension reel 22a, the outlet side of the rolling line direction is positive. Further, _βTR2 is a deviation amount in the rolling line direction of the end in the cylinder length direction of the second tension reel 22b, and the exit side in the rolling line direction is positive.

The horizontality α _TR1 and α _TR2 and orthogonality β _TR1 and β _TR2 of the first and second tension reels 22a and 22b are measured in advance before the cold rolling is operated, and the target shape is obtained from the input unit 6 described later. It is input to the correction unit 2.
Then, misalignment occurs in each roll _{21 1 ~21 i +} 1, by the roll _{21 1 ~21 i +} 1 is inclined, the height of the rolled material One end of each roll _{21 1 ~21 i +} 1 to be While height differences Δa ₁ to Δa _{i +1} occur between the height of the other end of the rolled material and the line direction position of one end of the rolled material of each roll 21 _{1 to} 21 _{i + 1} and the line of the other end of the rolled material Distance differences Δb _{1 to} Δb _{i + 1} occur between the directional positions.

Here, the height difference .DELTA.a _n of n-th roll 21 _n after leaving the cold rolling mill 10, as shown in FIG. 2 (A), using the levelness alpha _n described above, the height difference .DELTA.a _n = horizontal degree α _n × plate width
Further, as shown in FIG. 2 (B), the distance difference Δb _{n of the nth} roll 21 _n after leaving the cold rolling mill 10 is the distance difference Δb _n = directly using the aforementioned orthogonality β _n It can be expressed by degree β _n × plate width.

Therefore, the target shape correction unit 2, the first of these i + 1 th each roll ₂₁ 1 through 21 _{i + 1} of the height difference .DELTA.a ₁ ～Derutaei _{i + 1} levelness entered the alpha ₁ to? _I and it calculates ₊₁ is calculated from the first from the (i + 1) -th distance difference [Delta] b ₁ of each roll ₂₁ 1 through 21 _{i + 1} of ～Derutabi _{i + 1} orthogonal degrees beta ₁ is input to ～Beta _{i + 1} .
In addition, the height of one end of the material to be rolled of the first and second tension reels 22a and 22b and the height of the other end of the material to be rolled due to the degree of _flatness α _TR1 and α _TR2 of the first and second tension reels 22a and 22b. the height difference .DELTA.a _TR1 during, .DELTA.a _TR2 occurs, also, the first and second tension reel 22a, 22b of the orthogonal degrees beta _TR1, due to the beta _TR2 first and second tension reel 22a, and 22b to be distance difference [Delta] b _TR1 between the line direction position and the line direction position of the rolled material and the other end of the rolled material at one _end, [Delta] b _TR2 is generated.

Here, the height difference .DELTA.a _TR1 of the first tension reel 22a, using the levelness alpha _TR1 described above, represented by the height difference .DELTA.a _TR1 = levelness alpha _TR1 × strip width. Further, the height difference Δa _TR2 of the second tension reel 22b can be expressed by the height difference Δa _TR2 = horizontality α _TR2 × plate width using the above-mentioned horizontality α _TR2 .
Further, the distance difference Δb _TR1 of the first tension reel 22a can be expressed by the distance difference Δb _TR1 = the orthogonality β _TR1 × the plate width using the above-described orthogonality β _TR1 . Further, the distance difference Δb _TR2 of the second tension reel 22b can be expressed by the distance difference Δb _TR2 = the orthogonality β _TR2 × the plate width using the above-described orthogonality β _TR2 .

Accordingly, the target shape correction unit 2 sets the height difference Δa _TR1 of the first tension reel 22a and the height difference Δa _TR2 of the second tension reel 22b to the horizontal direction of the first tension reel 22a and the second tension reel 22b. degrees alpha _TR1, and calculates the respective alpha _TR2, first and second tension reel 22a the distance difference [Delta] b _TR2 range difference [Delta] b _TR1 and the second tension reel 22b of the first tension reel 22a, is inputted, 22b of It is calculated from each of the orthogonality β _TR1 and β _TR2 .

Next, height differences Δa ₁ to Δa _{i +1} occur between the height of one end of the rolled material of each roll 21 _{1 to} 21 _{i + 1} and the height of the other end of the rolled material, and each roll 21 ₁ to 21 A distance difference Δb _{1 to} Δb _{i + 1} is generated between the line direction position of one end of the material to be rolled 21 _{i + 1} and the line direction of the other end of the material to be rolled, and the first and second tension reels 22 a, A height difference Δa _TR1 , Δa _TR2 occurs between the height of one end of the material to be rolled 22b and the height of the other end of the material to be rolled, and the line direction of the one end of the material to be rolled of the first and second tension reels 22a and 22b If distance differences Δb _TR1 and Δb _TR2 occur between the position and the line direction position of the other end of the material to be rolled, the first to i-th rolls 21 _{1 to} 21 _i on the outlet side of the cold rolling mill 10 A material S to be rolled (rolled on a tension reel 22a (path In the case (1), a pass line length difference Δd shown in the equation (1) is generated in total between both ends in the plate width direction of the material to be rolled S, and the first to i + 1 th on the outlet side of the cold rolling mill 10 In the material to be rolled S (in the case of path 2) taken up on the second tension reel 22b via the rolls 21 _{1 to} 21 _{i + 1} of (2) in total between both ends in the plate width direction of the material to be rolled S The pass line length difference Δd shown in the equation is generated.

In (1) and (2), [Delta] d _{n over 1~n} the both ends of the plate width direction of the rolled material S, the outlet-side (n-1) th roll _{21 n-1} from the outlet side n-th roll It is the pass line length difference up to 21 _n . Further, in the equation (1), Δd _{i to TR} 1 are the pass line length differences from the i-th roll 21 _i on the outlet side to the first tension reel 22 a at both ends in the plate width direction of the material to be rolled S . Further, in the equation (2), Δd _{i + 1 to TR 2} are from the _{i +} 1th roll 21 _{i + 1} of the rolled material S in the plate width direction to the second tension reel 22 b It is a pass line length difference.

In addition, in the material S to be rolled (in the case of path 1) wound on the first tension reel 22a via the first to i-th rolls 21 _{1 to} 21 _i on the outlet side of the cold rolling mill 10, a total pass line The length d is expressed by the equation (3), and is wound onto the second tension reel 22b via the _first to _{i + 1st} rolls 21 _{1 to} 21 _{i + 1} on the outlet side of the cold rolling mill 10 In the rolled material S (in the case of path 2), the total pass line length d is as shown in equation (4).

(3) In the formula, and (4), d _{n over 1~n} is the rolled material in the plate width direction center of the S, the outlet-side (n-1) th roll ₂₁ side out of the _n-1 n-th roll 21 It is a pass line length up to _n . Further, in _{(3), d I～TR1} is pass line length of the plate width direction center of the rolled material S, from the output side the i-th roll 21 _i until the first tension reel 22a. Furthermore, in the equation (4), _{di + 1 to TR2} are the paths from the _{i + 1st} roll 21 _{i + 1 at the} center in the plate width direction of the material to be rolled S to the second tension reel 22b. It is a line length.

Here, up to the (1) and in (2), at both ends of the plate width direction of the rolled material S, the outlet-side (n-1) th roll 21 _n-1 from the outlet side n-th roll 21 _n The pass line length differences Δd _{n-1 to n} differ depending on the case where the form of the pass line of the material to be rolled S is shown in each of FIGS. 3A to 3D, and the pass line length differences Δd _{n-1 to n} When + is, it means that the pass line length on the OP side is long. (3) and (4) in the formula, the pass line length up to the material to be rolled in the plate width direction center of the S, the outlet-side (n-1) th roll 21 from _n-1 exit side n-th roll 21 _n Also, d _n- 1 to _n differ depending on the case where the form of the pass line of the material to be rolled S is shown in each of FIGS. 3 (A) to (D).

(A) When the form of the pass line of the material to be rolled S is shown in FIG. 3 (A) In this case, the above-mentioned pass line length difference Δdn- _{1 to n} can be expressed as the following equation (5).

Further, the above-mentioned pass line lengths d _{n-1 to n} can be expressed as the following equation (6).

here,
.Delta.a _n-1, .delta.a _n: the height of the height and the material to be rolled and the other end of the rolled material at one end of the calculated exit side (n-1) th roll 21 n as described _above, the delivery side n-th roll 21 _n Height difference between,
Δ b _n-1 , Δ b _n : Positions in the line direction of one end of the material to be rolled in the n-th roll 21 _{n on} the delivery side and n-th roll 21 _{n on} the delivery side calculated as described above and the other end of the material to be rolled Distance difference between line direction position,
r _{n -1} , r _n : roll radius of the n-1st roll on the discharge side 21 _n , the n-th roll on the discharge side 21 _n ,
l _n- 1 to _n : Line direction distance between roll centers at the plate center of the _n-1st roll 21 _n-1 on the discharge side to the n-th roll 21 _{n on} the discharge side
H _{n-1 to n} : height difference between roll centers at the plate center of the _n-1st roll on the discharge side 21 _n-1 to the _n- th roll on the discharge side 21 _n . These _{Δa n-1, Δa n,} Δb n-1, Δb n, r n-1, r n, l n-1~n, and H _{n-1 to n,} the following (7) to (12 ) In the formula.

(B) When the form of the pass line of the material to be rolled S is shown in FIG. 3 (B) In this case, the above-mentioned pass line lengths Δd _{n-1 to n} can be expressed as the following equation (7).

Further, the above-mentioned pass line lengths d _{n-1 to n} can be expressed as the following equation (8).

(C) When the form of the pass line of the to-be-rolled material S is shown in FIG. 3 (C) In this case, the above-mentioned pass line length Δdn- _{1 to n} can be expressed as the following equation (9).

Further, the above-mentioned pass line lengths d _{n-1 to n} can be expressed as the following equation (10).

(D) In the case where the form of the pass line of the material to be rolled S is shown in FIG. 3D In this case, the above-mentioned pass line lengths Δd _{n-1 to n} can be expressed as the following equation (11).

Further, the above-mentioned pass line lengths d _{n-1 to n} can be expressed as the following equation (12).

Next, in the equation (1), the pass line length differences Δd _i to _TR from the i-th roll 21 _i on the outgoing side to the first tension reel 22 a at both ends in the plate width direction of the material to be rolled S are It can be expressed as equation (13) of

Further, in the equation (3), the pass line lengths _{di to TR} 1 from the i-th roll 21 _i on the exit side to the first tension reel 22 a at the center in the plate width direction of the material to be rolled S Can be expressed as a formula.

here,
Δa _i : height difference between the height of one end of the material to be rolled of the i-th roll 21 _{i on} the delivery side calculated as described above and the height of the other end of the material to be rolled,
Δa _TR1 : height difference between the height of the end of the material to be rolled of the first tension reel 22a calculated as described above and the height of the other end of the material to be rolled,
Δb _i : distance difference between the line direction position of one end of the material to be rolled of the i-th roll 21 _{i on} the delivery side calculated as described above and the line direction position of the other end of the material to be rolled,
Δb _TR1 : Difference in distance between the line direction position of one end of the material to be rolled of the first tension reel 22a calculated as described above and the line direction position of the other end of the material to be rolled,
r _i : roll radius of i-th roll 21 _{i on} the outgoing side,
r _TR1: first coil radius of the rolled material to be wound into a tension reel _22a l i~TR1: exit side i-th line direction distance between the rolls and the reel center from the roll 21 _i in the plate center of the first tension reel 22a ,
H i to _{TR 1} : The height difference between the roll and the reel center at the plate center of the first tension reel 22 a from the i-th roll 21 _i on the _delivery side.

Here, the coil radius r _{TR1 of the} material to be rolled that is wound around the first tension reel 22a changes as the length of the coil that is wound along with the rolling changes, so the thickness of the material to be rolled (coil) its coil length, a reel radius TR ₁ of the first tension reel 22a, in consideration of the sleeve thickness Prefecture, is calculated by the following equation (15).

The coil length is measured by tracking the material to be rolled S wound around the first tension reel 22 a, and the measured value is input to the target shape correction unit 2.
Further, in the equation (2), the pass line length difference Δd _{i + 1} from the _{i + 1st} roll 21 _{i + 1} of the rolled material S in the plate width direction to the second tension reel 22 b _{TR TR2} can be expressed as the following equation (16).

Further, pass line lengths d _{i +1 to TR} 2 from the _{i + 1st} roll 21 _{i + 1 at the} center in the plate width direction of the material to be rolled S to the second tension reel 22 b in the equation (4) Can be expressed as the following equation (17).

here,
Δa _{i + 1} : height difference between the height of one end of the material to be rolled of the _{i +} 1th roll 21 _{i + 1} calculated as described above and the height of the other end of the material to be rolled,
Δa _TR2 : height difference between the height of one end of the material to be rolled of the second tension reel 22b calculated as described above and the height of the other end of the material to be rolled,
Δb _{i + 1} : The difference in the distance between the line direction position of the end of the material to be rolled of the _{i +} 1th roll 21 _{i + 1 on} the delivery side calculated as described above and the position in the line direction of the other end of the material to be rolled
Δb _TR2 : Difference in distance between the line direction position of one end of the material to be rolled of the second tension reel 22 b and the line direction position of the other end of the material to be rolled, calculated as described above
r _{i + 1} : roll radius of the _{i +} 1th roll 21 _{i + 1 on} the outgoing side,
r _TR2 : Coil radius of the material to be rolled wound on the second tension reel 22 b l _{i +1 to TR 2} : Roll and reel at the plate center of the second tension reel 22 b from the _{i +} 1th roll 21 _{i + 1} on the outgoing side Line direction distance between centers,
H _{i + 1 to TR 2} : The height difference between the roll and the reel center at the plate center of the second tension reel 22 b from the _{i +} 1th roll 21 _{i of the output} side.

Here, the coil radius r _{TR2 of the} material to be rolled that is wound around the second tension reel 22b changes as the length of the coil that is wound up changes with rolling, so the thickness of the material to be rolled (coil) its coil length, a reel radius TR ₂ of the second tension reel 22b, in consideration of the sleeve thickness Prefecture, is calculated by the following equation (18).

The coil length is measured by tracking the material to be rolled S wound around the second tension reel 22 b, and the measured value is input to the target shape correction unit 2.
As described above, when the material to be rolled S is wound up along the path 1, the target shape correction unit 2 sets the first to i-th rolls 21 on the outlet side of the cold rolling mill 10 based on the equation (1). _{In the case where the} total pass line length difference Δd between both ends in the plate width direction of the material to be rolled S taken up by the first tension reel 22a after _{1 to} 21 _i is calculated, and the material to be rolled S is wound up in path 2 , (2) based on equation from the first outlet side of the cold rolling mill 10 of the (i + 1) -th roll ₂₁ 1 through 21 _{i + 1} through the rolled material S is wound onto the second tension reel 22b A total pass line length difference Δd between both ends in the plate width direction is calculated.

In addition, when the material to be rolled S is wound up along the path 1, the target shape correction unit 2 sets the first to i-th rolls 21 _{1 to} 21 of the outlet side of the cold rolling mill 10 based on the equation (3). The total pass line length d of the material to be rolled S wound up on the first tension reel 22a via _i is calculated, and when the material to be rolled S is wound up along the path 2, it is cold based on equation (4) The total pass line length d of the material S to be rolled which is taken up on the second tension reel 22b via the 1st to (i + 1) th rolls 21 _{1 to} 21 _{i + 1} on the outlet side of the intermediate rolling mill 10 is calculated.

Then, in the target shape correction unit 2, when the material to be rolled S is taken up by the path 1, that is, the material to be rolled S is the first to i-th rolls 21 _{1 to} 21 _i of the outlet side of the cold rolling mill 10. The sheet of the material to be rolled S, based on the equations (1), (3), (5) to (15) and the following equation (19), when it is taken up on the first tension reel 22a through The difference in elongation percentage Δε between one side and the other side in the width direction is calculated.

The target shape correction unit 2, when the rolled material S is wound on the path 2, i.e. rolls 21 ₁ from the first output side (i + 1) th of the rolled material S is the cold rolling mill 10 to 21 _{In the} case where the second tension reel 22a is wound up through _{i + 1} , the following equations (19), (24), (5) to (12), (16) to (18) and the following (19) Based on the equation, the difference in elongation difference ratio Δε between one side and the other side in the plate width direction of the material to be rolled S is calculated.
Δε = Δd / d (19)

As described above, the target shape correction unit 2 calculates the difference in elongation difference ratio Δε between one side and the other side in the sheet width direction of the material to be rolled S as shown in the above-mentioned equations (1) to (19) upon, if the rolled material S is wound on the path 1, and levelness alpha ₁ to? _i and orthogonal degree β ₁ ~β _i of the first roll ₂₁ 1 through i-th roll 21 _i measured in advance, in advance The elongation difference ratio difference Δε is calculated based on the other measurement conditions of the elongation difference ratio difference shown below, in addition to the horizontality α _TR1 and the orthogonality β _TR1 of the first tension reel 22a measured.
1. Roll radius r ₁ to _r r of each roll 21 _{1 to} 21 _i
2. Adjacent roll ₂₁ 1 _{to 21 2,} 21 ₂ to 21 3, the line direction distance _l 1 to 2 between the rolls centers in the plate center _{··· 21 i-1 ~21 i,} l 2~3, ··· l _{i-1 to i}
3. Adjacent roll _{21 1 ~21 2, 21 2 ~21} 3, ··· 21 i-1 ~21 i height difference _H 1 to 2 between the rolls centers in the plate _{center, H 2~3,} ··· _{H i-1 to i}
4. 5. The coil thickness, coil length, reel radius TR ₁ of the first tension reel 22 a, sleeve thickness 5. for calculating the coil radius r _TR1 of the material to be rolled S wound around the first tension reel 22 a Line direction distance l _{i to TR} 1 between the roll and the reel center at the plate center of the first tension reel 22 a from the i-th roll 21 _i on the outgoing side
6. The height difference H _{i to TR 1} between the roll and the reel center at the plate center of the i-th roll 21 _i to the first tension reel 22 a

In addition, when the target shape correction unit 2 calculates the difference in elongation difference ratio Δε between one side and the other side in the plate width direction of the material to be rolled S, the target shape correction unit 2 measures in advance when the material to be rolled S is wound around the path 2 a first roll ₂₁ 1 through i + 1 th ₁ levelness α of the roll 21 _{i + 1} ~α _{i + 1} and direct degree β ₁ ~β _{i + 1,} levelness of the second tension reel 22b measured in advance The elongation difference percentage difference Δε is calculated based on the other elongation difference percentage difference calculation conditions described below, in addition to α _TR2 and orthogonality β _TR2 .
11. Roll radius r ₁ to _{r r + 1 of} each roll 21 _{1 to} 21 _{i + 1}
12. Line direction distance between the roll center at the plate center of adjacent rolls 21 _{1 to} 21 ₂ , 21 _{2 to} 21 ₃ ,... 21 _{i to} 21 _{i + 1} l _{1 2} , l _{2 3} ,. _{i to i + 1}
13. Height difference between the roll centers at the plate center of adjacent rolls 21 _{1 to} 21 ₂ , 21 _{2 to} 21 ₃ ,... 21 _{i to} 21 _{i + 1} H _{1 to 2} H _{2 to 3} H _{i to i + 1}
14. To calculate the coil radius r _TR2 of the material to be rolled S wound around the second tension reel 22b, the thickness of the coil, the coil length, the reel radius TR ₂ of the second tension reel 22b, the sleeve thickness 15. Line direction distance l _{i +1 to TR 2} between the roll and the reel center at the plate center of the _{i + 1st} roll 21 _{i + 1} to the second tension reel 22 b
16. The height difference H _{i +1 to TR 2} between the roll center and the reel center at the plate center of the _{i + 1st} roll 21 _{i + 1} to the second tension reel 22 b

Target shape correction unit 2 includes a levelness alpha ₁ to? _{I + 1} and direct degree β ₁ ~β _{i + 1} of each roll ₂₁ 1 through 21 _{i + 1} measured in advance, the first and second tension measured in advance The horizontality α _TR1 and α _TR2 and orthogonality β _TR1 and β _{TR2 of the} reels 22a and 22b, and the conditions 1 to 6 and 11 to 16 described above are acquired from the input unit 6 in advance.
The coil radius r _TR1 of the material to be rolled S wound around the first tension reel 22a and the coil length r _TR2 for calculating the coil radius r _TR2 of the material to be rolled wound around the second tension reel 22b are for tracking. The measured value is input from the input unit 6 to the target shape correction unit 2.

  Further, the target shape correction unit 2 corrects a target shape of the material to be rolled S set in advance, based on the elongation difference percentage difference Δε calculated by the equation (19). The target shape of the material to be rolled S is the target shape of the material to be rolled S after cold rolling, and may be common to the material to be rolled S to be cold rolled, or it is determined depending on the steel type It may be The target shape of the material to be rolled S determined in advance is input from the input unit 6 to the target shape correction unit 2. The target shape correction unit 2 is preset so that the elongation at the end of the material to be rolled S is subtracted from the target shape based on the elongation difference ratio difference Δε calculated by the equation (19). Correct the target shape. The target shape correction unit 2 sends the corrected target shape to the shape deviation calculation unit 4.

Next, the shape meter 3 measures the shape of the material to be rolled S rolled by the cold rolling mill 10, and the tension of the material to be rolled S is measured for each predetermined region in the plate width direction of the material to be rolled S. It is comprised by the roll body provided with the several sensor to detect. Shape meter 3, as shown in FIG. 1, the delivery side of the cold rolling mill 10, in the present embodiment is provided as a delivery side second roll 21 _2. The shape meter 3 sends the actually measured shape of the material to be rolled S after cold rolling to the shape deviation calculation unit 4.

The shape deviation calculation unit 4 is a deviation between the shape measurement value of the material to be rolled S measured by the shape meter 3 and the target shape corrected by the target shape correction unit 2. The shape deviation of the material to be rolled S is calculated. The calculated shape deviation is sent to the control unit 5.
The control unit 5 is based on the shape deviation of the material to be rolled S calculated by the shape deviation calculation unit 4, the operation amount of the work roll benders 13 a and 13 b provided in the cold rolling mill 10 and the leveling amount by the reduction device 14 Control. That is, the control unit 5 determines the amount of movement of the work roll benders 13a and 13b and the amount of leveling by the reduction device 14 corresponding to the shape deviation which is the deviation between the corrected target shape and the shape measurement value measured by the shape meter 3. Control.

Thereby, when the material to be rolled S is taken up by the passage 1, the shape of the material to be rolled S rolled by the cold rolling mill 10 and taken up on the first tension reel 22a approaches the target shape, The shape defect resulting from the misalignment of the _1st roll 21 _1-the i-th roll 21 _i arrange | positioned at the output side of the cold rolling mill 10 can be suppressed. In addition, when the material to be rolled S is taken up in the path 2, the shape of the material to be rolled S rolled by the cold rolling mill 10 and taken up on the second tension reel 22b approaches the target shape. it is possible to suppress the shape defect caused by the first roll 21 1 _{through i} + 1 th misalignment of roll 21 i _{+ 1,} which is arranged on the outlet side between the rolling mill 10.

The input unit 6 includes not only information (such as steel type) on the material to be rolled S cold rolled by the cold rolling mill 10, but also a path along which the material to be rolled S is wound. when wound, the first roll ₂₁ 1 through i-th roll 21 _i and levelness alpha ₁ to? _i and orthogonal degree β ₁ ~β _i of measured in advance, levelness of first tension reel 22a measured in advance In addition to α _{TR 1} and orthogonality β _TR 1, the first to sixth rolls 21 _{1 to} i previously measured when the material to be rolled S is wound up in path 2 are the other elongation difference percentage calculation conditions of 1 to 6 described above. Of the _{+ 1st} roll 21 _{i + 1} , and the degree α _TR2 and degree β _TR2 of the second tension reel 22b measured in advance, and the degree α _{1 to} α _{i + 1} and the degree of orthogonality β _{1 to} β _{i + 1} In addition, the other elongation difference rate difference calculation conditions of 11 to 16 described above are Input to the shape correction unit 2. Further, the input unit 6 inputs a target shape to be a target of the material to be rolled S after cold rolling to the target shape correction unit 2. The input unit 6 is configured by appropriately combining a process computer for managing a production line operation for executing a cold rolling process and an input device.

Next, a method of controlling the shape of a material to be rolled according to an embodiment of the present invention will be described. This shape control method is an operation of configuring the target shape correction unit 2, the shape deviation calculation unit 4 and the control unit 5 of the shape control device 1 shown in FIG. 4 for each material to be rolled S using the shape control device 1 described above. The arithmetic processing flow of the processing apparatus is executed to control the shape of the material S to be rolled during cold rolling.
In the method of controlling the shape of the material S to be rolled, the target shape correction unit 2 of the shape control device 1 first performs the information on the material S to be rolled cold by the cold rolling mill 10 from the input unit 6 in step S101. In addition, the route (route 1 or route 2) in which the material to be rolled S is wound is acquired.

Next, in step S102, when the material S to be rolled is wound up in the path 1, the target shape correction unit 2 measures the horizontality α _{1 to} α of the _first roll 21 _{1 to} i-th roll 21 _i measured in advance. _{The i} and the orthogonality β _{1 to} β _i and the horizontality α _TR1 and the orthogonality β _{TR1 of} the first tension reel 22a measured in advance are acquired. In addition, when the material to be rolled S is taken up along the path 2, the target shape correction unit 2 measures the horizontality α _{1 to} α _{i of the first} roll 21 _{1 to} i + 1st roll 21 _{i + 1} measured in advance. ₊₁ and direct degree β ₁ ~β _{i + 1,} to obtain a levelness alpha _TR2 and direct degree beta _TR2 of the second tension reel 22b measured in advance.

Next, in step S103, when the material to be rolled S is wound up along the path 1, the target shape correction unit 2 acquires the other differential elongation difference ratio calculation conditions 1 to 6 described above from the input unit 6. Further, when the material to be rolled S is wound up along the path 2, the other difference in elongation difference ratio calculation conditions 11 to 16 described above are acquired from the input unit 6.
In addition, the coil length in the 1st tension reel 22a and the 2nd tension reel 22b tracks and measures to-be-rolled material S wound around the 1st tension reel 22a and the 2nd tension reel 22b, The measurement value is target shape correction | amendment Acquired in Part 2.

Next, in step S104, the target shape correction unit 2 calculates the difference in elongation difference ratio Δε between one side and the other side in the plate width direction of the material to be rolled S.
Specifically, in the case where the material to be rolled S is wound up along the path 1, the target shape correction unit 2 sets up the equations (1), (3), (5) to (15) and (19) Based on the equation, the difference in elongation difference ratio Δε between one side and the other side in the plate width direction of the material to be rolled S is calculated.
In addition, when the material to be rolled S is wound up along the path 2, the target shape correction unit 2 performs the operations (2), (4), (5) to (12), (16) to (18) Based on the equation and equation (19), the difference in elongation difference Δε between one side and the other side in the plate width direction of the material to be rolled S is calculated.

Next, in step S105, the target shape correction unit 2 acquires a preset target shape from the input unit 6.
Thereafter, the target shape correction unit 2 corrects the acquired target shape in step S106.
Specifically, in the case where the material to be rolled S is taken up along the path 1, the rolling force calculated by the equations (1), (3), (5) to (15) and (19) Based on the difference in elongation difference ratio Δε between one side and the other side in the sheet width direction of the material S, the elongation at the end of the material to be rolled S is preset so as to be subtracted from the target shape Correct the target shape.

  In addition, when the material to be rolled S is wound up along the path 2, the target shape correction unit 2 performs the operations (2), (4), (5) to (12), (16) to (18) Based on the difference in elongation difference Δε between one side and the other side in the sheet width direction of the material to be rolled S calculated by the equation and equation (19), the elongation at the end of the material to be rolled S is The preset target shape is corrected so as to be subtracted from the target shape.

Then, the target shape correction unit 2 sends the corrected target shape to the shape deviation calculation unit 4.
Next, in step S107, the shape deviation calculation unit 4 acquires the shape measurement value of the material to be rolled S measured by the shape meter 3.
Then, in step S108, the shape deviation calculation unit 4 calculates the shape measurement value of the material to be rolled S measured by the shape meter 3 and the target shape corrected by the target shape correction unit 2 Calculate shape deviation.

  Specifically, in the shape deviation calculation unit 4, the shape measurement value of the material to be rolled S measured by the shape meter 3 and the material to be rolled S measured by the shape meter 3 are wound along the path 1. In the case, the difference in elongation difference ratio between one side and the other side in the sheet width direction of the material to be rolled S calculated by the equations (1), (3), (5) to (15) and (19) The deviation from the target shape corrected based on Δε is calculated.

  When the shape deviation calculation unit 4 measures the shape of the material to be rolled S measured by the shape meter 3 and the material to be rolled S measured by the shape meter 3 is wound along the path 2, One side and the other side of the sheet width direction of the material to be rolled S calculated by the equations (2), (4), (5) to (12), (16) to (18) and (19) The deviation from the corrected target shape is calculated based on the elongation difference ratio difference Δε.

Then, the shape deviation calculation unit 4 sends the calculated shape deviation of the material to be rolled S to the control unit 5.
Then, in step S109, the control unit 5 operates the operation amounts of the work roll benders 13a and 13b provided in the cold rolling mill 10 based on the shape deviation of the material to be rolled S calculated by the shape deviation calculation unit 4. The leveling amount by the pressure reduction device 14 is controlled.

Thereby, when the material to be rolled S is taken up by the passage 1, the shape of the material to be rolled S rolled by the cold rolling mill 10 and taken up on the first tension reel 22a approaches the target shape, The shape defect resulting from the misalignment of the _1st roll 21 _1-the i-th roll 21 _i arrange | positioned at the output side of the cold rolling mill 10 can be suppressed. In addition, when the material to be rolled S is taken up in the path 2, the shape of the material to be rolled S rolled by the cold rolling mill 10 and taken up on the second tension reel 22b approaches the target shape. it is possible to suppress the shape defect caused by the first roll 21 1 _{through i} + 1 th misalignment of roll 21 i _{+ 1,} which is arranged on the outlet side between the rolling mill 10.

  Finally, in step S110, the arithmetic processing unit determines whether or not the shape control at the time of cold rolling on the material S to be rolled for one coil has been completed. In step S110, when it is determined that the shape control at the time of cold rolling on the material S to be rolled for one coil is not completed (No in step S110), the process returns to step S107 and repeats the processing steps after step S107. . On the other hand, when it is determined in step S110 that the shape control at the time of cold rolling on the material S to be rolled for one coil is completed (Yes in step S110), the arithmetic processing unit ends the present processing.

The method of manufacturing a thin metal sheet according to the present embodiment uses the above-described shape control method of the material to be rolled S, and the material to be rolled S rolled by a cold rolling mill (rolling machine) 10 has the above-described shape. Whether the shape is controlled by the control method and taken up by the first tension reel 22a via the plurality (i pieces) of rolls 21 _{1 to} 21 _i arranged on the outlet side of the cold rolling mill 10 (path 1) Alternatively, it is wound around the second tension reel 22b via a plurality of (i + 1) rolls 21 _{1 to} 21 _{i + 1} arranged on the outlet side of the cold rolling mill 10 (path 2). Sheet metal is manufactured.

As mentioned above, although embodiment of this invention was described, this invention can perform a various change and improvement, without being limited to this.
For example, the number of rolls disposed on the outlet side of the cold rolling mill 10 is not limited to plural but may be singular.
The number of tension reels is not limited to two, and may be singular or three or more.

DESCRIPTION OF SYMBOLS 1 Shape control apparatus of material to be rolled 2 Target shape correction part 3 Shape gauge 4 Shape deviation calculation part 5 Control part 6 Input part 10 Cold rolling mill (rolling machine)
11a, 11b Work roll 12a, 12b Backup roll 13a, 13b Work roll bender 14 Pressure reduction device 21 _{1 to} 21 _{i + 1} roll 22a 1st tension reel (tension reel)
22b Second tension reel (Tension reel)
S Rolled material

Claims (3)

A shape control device of a material to be rolled, which is applied to a rolling line for winding a material to be rolled rolled by a rolling mill with a tension reel via a roll disposed on the outlet side of the rolling machine.
Based on the level and orthogonality of the roll and the tension reel measured in advance, the difference in elongation difference ratio between one side and the other side in the plate width direction of the material to be rolled is calculated, and the calculated difference in elongation difference ratio A target shape correction unit that corrects a target shape of a material to be rolled that has been preset based on the
A shape meter for measuring the shape of the material to be rolled rolled by the rolling mill;
A shape deviation calculation unit for calculating a shape deviation of a material to be rolled which is a deviation between a shape measurement value measured by the shape meter and a target shape corrected by the target shape correction unit;
A control unit configured to control an operation amount of the work roll bender provided in the rolling mill and a leveling amount by the drafting device based on the shape deviation of the material to be rolled calculated by the shape deviation calculation unit; Shape control device for rolled material. It is a shape control method of the material to be rolled which is applied to a rolling line which rolls up a material to be rolled rolled by a rolling mill with a tension reel via a roll disposed on the outlet side of the rolling machine.
Based on the level and orthogonality of the roll and the tension reel measured in advance, the difference in elongation difference ratio between one side and the other side in the plate width direction of the material to be rolled is calculated, and the calculated difference in elongation difference ratio Correct the target shape of the material to be rolled that has been set in advance based on
Calculate the shape deviation of the material to be rolled, which is the deviation between the shape measurement value measured by the shape meter and the corrected target shape,
A method of controlling the shape of a material to be rolled, comprising controlling an amount of movement of a work roll bender provided in the rolling mill and a leveling amount by a drafting device based on the calculated shape deviation of the material to be rolled.   A method of manufacturing a thin metal sheet, using the method of controlling the shape of a material to be rolled according to claim 2.

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