JP6394625B2 - Width reduction device and side guide position control method of width reduction device - Google Patents

Description

  The present invention relates to a width reduction device for reducing the width of a metal material such as a steel material as a material to be rolled, and a side guide position control method for the width reduction device.

  Conventionally, it is known that a camber is generated on a material to be rolled in a hot rolling line in which the material is rolled and rolled on a material to be rolled such as a slab. Camber is a phenomenon of bending in the width direction with respect to the longitudinal direction of the material to be rolled (bending in the horizontal direction).

  For example, in a rolling process such as rough rolling of the material to be rolled, the temperature of the material to be rolled in the width direction or thickness deviation, the width of the roll opening of the rolling roll is not uniform in the width direction, etc. Camber is generated. When the amount of camber of the material to be rolled (the amount of bending in the width direction with respect to the longitudinal direction of the material to be rolled) is excessively large compared to the allowable range in the hot rolling line, Trouble of passing the plate that prevents the rolling of the material to be rolled (passing plate) due to unintended contact occurs. This plate-feeding trouble leads to equipment damage in hot rolling lines such as rolling rolls and side guides. Furthermore, when the tail end portion of the material to be rolled comes off from the rolling mill (disengages from the bottom), the edge portion (width direction end portion) of the material to be rolled is folded due to the collision between the material to be rolled and the side guide. A rolling trouble called “squeezing” occurs in which the material to be rolled is rolled.

  The camber of the material to be rolled, which causes the above-described troubles in sheet passing and rolling, is generated not only by rolling but also by width reduction. For example, in the width reduction process of the material to be rolled, due to the temperature deviation in the width direction of the material to be rolled, the high temperature side (the side with low deformation resistance) in the width direction of the material to be rolled is the low temperature side (the deformation resistance is large). Therefore, a camber that bends from the high temperature side to the low temperature side of the material to be rolled is generated. Such temperature deviation in the width direction of the material to be rolled is mainly caused by the influence of outside air cooling when the extraction door of the heating furnace that heats the material to be rolled (slab) in the hot rolling line is opened and closed. Furthermore, the interval between adjacent rolled materials in the heating furnace, the size of the rolled material, the in-furnace time, and the like affect the temperature deviation in the width direction of the rolled material in a complicated manner. For this reason, it is difficult to heat the material to be rolled completely in the width direction.

  In addition, as a conventional technique for suppressing the camber of the material to be rolled as described above, for example, in Patent Document 1, a temperature difference at both ends in the width direction of the material to be rolled is measured in advance before rolling, A hot rough rolling method has been proposed in which the rolling leveling of the rolling mill (the difference in roll opening between both ends in the width direction of the rolling roll) is set in accordance with the measured temperature difference. In Patent Document 2, a camber of a material to be rolled is detected by a camber meter disposed on one side across a reversible rolling mill, and the material of the material to be rolled in the next pass is detected based on the detection result of the camber. A camber control method has been proposed in which the bending state of the camber is predicted, and when rolling is performed in the next pass, the reduction leveling is controlled based on the predicted bending state of the camber.

  Further, in Patent Document 3, a camber of a material to be rolled that occurs during width reduction due to a temperature difference in the width direction of the material to be rolled is changed during width reduction by changing a rolling phase between opposed dies of the width reduction device. Camber correction methods for correcting have been proposed. In Patent Document 4, a load difference in the width direction of the material to be rolled is detected by a pair of hard rolls arranged in the vicinity of the exit side of a pair of width rolling dies (die) for width-rolling the material to be rolled, and the detected load A width reduction method for inclining the width reduction die so that the difference becomes zero has been proposed.

JP 60-133904 A Japanese Patent No. 3584661 JP 2001-113338 A JP-A-6-277717

  By the way, between a pair of width reduction molds for reducing the width of the material to be rolled and a pair of side guides for determining the center position in the width direction of the material to be rolled before width reduction, a pair of width reduction is used. There is a positional deviation between the center position in the opposing direction of the mold (hereinafter referred to as “width press center position”) and the center position in the opposing direction of the pair of side guides (hereinafter referred to as “side guide center position”). The positional shift of the side guide center position with respect to the width press center position is not completely eliminated even if equipment adjustment is performed to adjust the position in the facing direction with respect to each of the pair of side guides. Therefore, in the width reduction process of the material to be rolled, due to a cause other than the temperature deviation in the width direction of the material to be rolled, that is, due to the positional deviation of the side guide center position with respect to the width press center position, Will occur.

  However, in the above-described conventional technology, it is difficult to suppress the camber of the material to be rolled that is generated due to such a positional shift of the side guide center position with respect to the width press center position. For this reason, the amount of camber of the material to be rolled after width reduction increases, and as a result, troubles in passing the rolling material and rolling troubles (hereinafter collectively referred to as “operation troubles” as appropriate) frequently occur. There is a fear.

  The present invention has been made in view of the above circumstances, and is capable of suppressing the occurrence of camber due to width reduction of a metal material such as a material to be rolled, and a side guide position control method for the width reduction apparatus. The purpose is to provide.

  As a result of intensive studies on the suppression of the occurrence of camber at the time of width reduction of the material to be rolled, the pair of width reduction molds are symmetrical in the width direction of the material to be rolled. Therefore, even if the die for width reduction is inclined with respect to the material to be rolled by rotation or the like, it has been found that it is difficult to suppress the occurrence of the camber. In addition, the inventors focused on the positional relationship in the width direction between the pair of width reduction dies and the material to be rolled, and constrained the center position in the width direction of the material to be rolled before width reduction by the pair of side guides. It has been found that the occurrence of the camber can be suppressed by appropriately controlling the center position of the side guide at the time of determination with respect to the pair of width reduction dies.

  That is, in order to solve the above-described problems and achieve the object, the width reduction device according to the present invention uses a pair of side guides opposed to the width direction of the metal material to center the width direction of the metal material before the width reduction. A side guide device for determining the position, a width press machine for reducing the width of the metal material whose width direction center position is determined by the side guide device, and a metal material whose width direction center position is currently determined by the side guide device. A camber amount measuring unit for measuring a camber amount of a front material, which is a metal material that was previously subjected to width reduction by the width press machine before a certain material, and a camber amount of the front material measured by the camber amount measuring unit. Based on the change in the camber amount due to the difference in the material width and width reduction amount before the width reduction between the front material and the current material, the center position in the opposing direction of the pair of side guides A calculation processing unit that calculates a correction amount of the side guide center position, and a side guide center position of the side guide device when the center position in the width direction of the front member is determined is the correction amount calculated by the calculation processing unit. And a control unit that controls the side guide center position of the side guide device when the width direction center position of the material is determined.

  Further, in the width reduction device according to the present invention, in the above invention, the arithmetic processing unit is configured so that the camber amount Cam0 of the front material measured by the camber amount measurement unit and the material width before the width reduction of the front material. W0, the width reduction amount ΔW0 set for the front material, the material width W1 before the width reduction of the material, and the width reduction amount ΔW1 set for the material, A correction amount ΔS of the guide center position is calculated.

ただし、チューニング率αは、キャンバー量Ｃａｍ０を修正量ΔＳに換算する係数である。チューニング率βおよびチューニング率γは、幅圧下時の金属材の材幅および幅圧下量に対するキャンバーの発生し易さを示す指標である。

However, the tuning rate α is a coefficient for converting the camber amount Cam0 into the correction amount ΔS. The tuning rate β and the tuning rate γ are indexes indicating the ease of occurrence of camber with respect to the width of the metal material and the amount of width reduction during width reduction.

  Further, the side guide position control method of the width reduction device according to the present invention determines a center position in the width direction of the metal material before the width reduction using a pair of side guides opposed to the width direction of the metal material, and In a side guide position control method of a width reduction device that performs width reduction of a metal material whose width direction center position is determined by a side guide device having a side guide by a width press, the width direction center position is determined this time by the side guide device. A camber amount measuring step of measuring a camber amount of a front material that is a metal material that was previously subjected to width reduction by the width press before the metal material that is a metal material, and the front material measured by the camber amount measuring step Based on the amount of camber, taking into account the change in the camber amount due to the difference in material width and width reduction amount before the width reduction between the previous material and the current material A calculation processing step for calculating a correction amount of a side guide center position that is a center position in the opposing direction of the pair of side guides, and a side guide center position of the side guide device when the width direction center position of the front member is determined. A control step of controlling the side guide center position of the side guide device when determining the center position in the width direction of the material by correcting the correction amount calculated by the calculation processing step. And

  Further, in the side guide position control method of the width reduction device according to the present invention, in the above invention, the calculation processing step includes the camber amount Cam0 of the front material measured by the camber amount measurement step, and the front material Using the material width W0 before width reduction, the width reduction amount ΔW0 set for the front material, the material width W1 before width reduction of the material, and the width reduction amount ΔW1 set for the material, The correction amount ΔS of the side guide center position is calculated based on the above.

ただし、チューニング率αは、キャンバー量Ｃａｍ０を修正量ΔＳに換算する係数である。チューニング率βおよびチューニング率γは、幅圧下時の金属材の材幅および幅圧下量に対するキャンバーの発生し易さを示す指標である。

However, the tuning rate α is a coefficient for converting the camber amount Cam0 into the correction amount ΔS. The tuning rate β and the tuning rate γ are indexes indicating the ease of occurrence of camber with respect to the width of the metal material and the amount of width reduction during width reduction.

  According to the present invention, it is possible to suppress the occurrence of camber due to the width reduction of a metal material such as a material to be rolled.

FIG. 1 is a diagram illustrating a configuration example of a width reduction device according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the camber amount after the width reduction of the material to be rolled in the embodiment of the present invention. FIG. 3 is a diagram for explaining the mechanism of camber generation due to the width reduction of the material to be rolled in the embodiment of the present invention. FIG. 4 is a flowchart showing an example of the side guide position control method of the width reduction device according to the embodiment of the present invention. FIG. 5 is a diagram for specifically explaining the control of the side guide center position shifted to the OP side with respect to the width press center position. FIG. 6 is a diagram for specifically explaining the control of the side guide center position shifted to the DR side with respect to the width press center position. FIG. 7 is a diagram showing the investigation results of Example 1 of the present invention in Example 1. FIG. 8 is a diagram illustrating the investigation result of Comparative Example 1 in Example 1. FIG. 9 is a diagram showing the investigation result of Example 2 of the present invention in Example 2. FIG. 10 is a diagram illustrating the investigation result of Comparative Example 2 in Example 2.

  Exemplary embodiments of a width reduction device and a side guide position control method for the width reduction device according to the present invention will be explained below in detail with reference to the accompanying drawings. In this embodiment, as an example of the metal material to be subjected to the width reduction, a material to be rolled (such as a slab) in a hot rolling line for producing a hot-rolled steel sheet is illustrated. It is not limited. Moreover, the drawings are schematic, and it should be noted that the relationship between the dimensions of each element, the ratio of each element, and the like may differ from the actual ones. Even between the drawings, there are cases in which portions having different dimensional relationships and ratios are included. Moreover, in each drawing, the same code | symbol is attached | subjected to the same component.

(Width reduction device)
First, the configuration of the width reduction device according to the embodiment of the present invention will be described. FIG. 1 is a diagram illustrating a configuration example of a width reduction device according to an embodiment of the present invention. The width reduction apparatus 1 according to the present embodiment is an apparatus that sequentially reduces the width of a plurality of rolled materials that are conveyed along a conveyance path 11 of a hot rolling line, for example, as shown in FIG. The apparatus 2, the width press 5, the camber amount measuring unit 8, the arithmetic processing unit 9, and the control unit 10 are provided.

  The side guide device 2 determines the center position in the width direction of the material to be rolled before width reduction. As shown in FIG. 1, the side guide device 2 includes a pair of side guides 3a and 3b and a pair of guide driving units 4a and 4b. The side guide device 2 is disposed on the entry side of the width press machine 5 along the conveyance path 11 of the material to be rolled.

  The pair of side guides 3a and 3b are plate-shaped guide members for determining the center position in the width direction of the material to be rolled before width reduction. As shown in FIG. 1, each of the pair of side guides 3 a and 3 b includes a flat portion that is pressed against the width direction end of the material to be rolled, and an inclined portion that is inclined toward the outside of the transport path 11 with respect to the flat portion. Have In the present embodiment, of the pair of side guides 3a and 3b, one side guide 3a is a guide member on the working side (OP side) in the hot rolling line, and the other side guide 3b is hot rolled. It is a guide member on the drive side (DR side) in the line. These side guides 3a and 3b are arranged to face the width direction D1 of the material to be rolled conveyed along the conveyance path 11. At this time, the flat portions of the side guides 3a and 3b face each other in the width direction D1 of the material to be rolled, and the inclined portions of the side guides 3a and 3b are wider than the facing space between the flat portions. A space is formed on the entry side of the side guide device 2.

  The pair of guide driving portions 4a and 4b are configured to reciprocate the pair of side guides 3a and 3b in the width direction D1 of the material to be rolled (see the thick double-sided arrows in FIG. 1). In the present embodiment, each of the pair of guide driving units 4a and 4b is, for example, a hydraulic driving unit. As shown in FIG. 1, of the pair of guide driving units 4 a and 4 b, one guide driving unit 4 a is configured so that the OP-side side guide 3 a is placed in the width direction D <b> 1 of the material to be rolled based on control by the control unit 10. Move back and forth. The other guide drive unit 4b reciprocates the DR side guide 3b in the width direction D1 of the material to be rolled based on the control by the control unit 10.

  The side guide device 2 having the above-described configuration uses a pair of side guides 3a and 3b facing the width direction D1 of the material to be rolled, and operates the pair of side guides 3a and 3b by the pair of guide driving units 4a and 4b, respectively. The width direction center position of the material to be rolled before width reduction is determined. At this time, as shown in FIG. 1, after the width reduction of the front material 15 by the width press machine 5 is finished, the side guide device 2 moves the material 16 subsequent to the front material 15 to the pair of side guides 3 a, 3b is restrained by being sandwiched in the width direction D1. Accordingly, the side guide device 2 matches the corrected side guide center position S1 based on the control by the control unit 10 with the width direction center position S4 of the material 16, and the width press center of the width press machine 5 described later. A center position S4 in the width direction of the material 16 with respect to the position S2 is determined. Thereafter, the side guide device 2 releases the restraint of the material 16 by the pair of side guides 3a and 3b, and enables the material 16 to be conveyed along the conveyance path 11.

  In the present embodiment, the material 16 is to be rolled whose center position in the width direction is currently determined by the side guide device 2 among the plurality of rolled materials that are sequentially conveyed along the conveying path 11 of the hot rolling line. It is a material. The front material 15 is a material to be rolled whose width direction center position has already been determined by the side guide device 2 prior to the current material 16 and has been previously subjected to width reduction by the width press 5 before the current material 16. Examples of the front material 15 and the current material 16 include steel materials (rolled materials) such as slabs after being heated by a heating furnace (not shown) of a hot rolling line.

  In the present embodiment, the side guide center position S1 is a center position in the facing direction of the pair of side guides 3a and 3b facing the width direction D1 of the material to be rolled. Specifically, as shown in FIG. 1, the side guide center position S1 is the center position in the facing direction (width direction D1) between the pair of side guides 3a and 3b. The width direction center position S4 is a center position in the width direction D1 of the rolled material exemplified by the front material 15 and the current material 16.

  The width press machine 5 is for reducing the width of the material to be rolled whose center position in the width direction is determined by the side guide device 2. As shown in FIG. 1, the width press machine 5 includes a pair of width press dies 6 a and 6 b and a pair of mold drive units 7 a and 7 b. The width press machine 5 is disposed on the exit side of the side guide device 2 along the conveyance path 11 of the material to be rolled.

  The pair of width press dies 6a and 6b are width reduction dies for width reduction (width press) of the material to be rolled after the side guide device 2 determines the center position in the width direction. As shown in FIG. 1, each of the pair of width press dies 6a and 6b has a flat portion and an inclined portion that press the material to be rolled from both the positive and negative sides in the width direction D1. In the present embodiment, of the pair of width press dies 6a and 6b, one width press dies 6a is an OP side die in the hot rolling line, and the other width press dies 6b are heat It is a die on the DR side in a hot rolling line. These width press dies 6a and 6b are arranged to face the width direction D1 of the material to be rolled conveyed along the conveyance path 11. At this time, the flat portions of the width press dies 6a and 6b face each other in the width direction D1 of the material to be rolled, and the inclined portions of the width press dies 6a and 6b are opposed spaces between the flat portions. A wider space is formed from the flat portion toward the entry side of the width press machine 5.

  The pair of mold drive parts 7a and 7b are configured to reciprocate the pair of width press dies 6a and 6b in the width direction D1 of the material to be rolled (see the thick double-sided arrows in FIG. 1). In the present embodiment, as shown in FIG. 1, one of the pair of mold drive units 7 a and 7 b is configured such that one mold drive unit 7 a uses the OP-side width press mold 6 a in the width direction D1 of the material to be rolled. The other die drive part 7b reciprocates the DR side width press die 6b in the width direction D1 of the material to be rolled.

  The width press machine 5 having the above-described configuration uses a pair of width press dies 6a and 6b opposed to the width direction D1 of the material to be rolled, and a pair of width press dies 6a by a pair of mold drive units 7a and 7b. , 6b are operated to reduce the width of the material to be rolled after the determination of the center position in the width direction. At this time, the pair of mold driving portions 7a and 7b reciprocally move the pair of width press dies 6a and 6b symmetrically in the width direction D1 of the material to be rolled around the conveyance path center position S3 shown in FIG. Let That is, the pair of width press dies 6a and 6b are arranged such that the width press center position S2 and the transport path center position S3 coincide. The width reduction amount of the width press machine 5 is set by, for example, a process computer (not shown) that manages the operation of the hot rolling line.

  In the present embodiment, the width press center position S2 is a center position in the facing direction of the pair of width press dies 6a and 6b facing the width direction D1 of the material to be rolled. Specifically, as shown in FIG. 1, the width press center position S2 is a center position in the facing direction (width direction D1) between the pair of width press dies 6a and 6b. The conveyance path center position S3 is the center position of the conveyance path 11 in the width direction D1 of the material to be rolled.

  The camber amount measuring unit 8 measures the amount of camber after the width reduction of the front material 15 preceding the material 16. Specifically, the camber amount measuring unit 8 is configured using an imaging device or the like, and is disposed on the exit side of the width press machine 5 as shown in FIG. The camber amount measuring unit 8 determines the generation direction and the generation amount of the camber of the front member 15 that has been width-reduced by the width press machine 5 before the width direction center position S4 of the member 16 is determined by the side guide device 2. Optically detected by an imaging device or the like. The camber amount measuring unit 8 performs predetermined image processing or the like on the detection result of the camber in the front material 15, and thereby the camber amount of the front material 15 is changed in the width direction in the entire length direction D <b> 2 of the front material 15. Measured as the amount of bending to D1. At this time, the camber amount measuring unit 8 distinguishes the generation direction of the camber of the front material 15 by the sign of the camber amount (measured value) of the front material 15. Each time the camber amount measuring unit 8 measures the camber amount of the front material 15 in this way, the camber amount measuring unit 8 transmits the measured camber amount to the arithmetic processing unit 9.

  The arithmetic processing unit 9 calculates a correction amount ΔS of the side guide center position S1 of the side guide device 2 necessary for suppressing the occurrence of camber when the width of the material 16 is reduced. In the present embodiment, the arithmetic processing unit 9 corrects the positional shift of the side guide center position S1 to be corrected when the side guide device 2 determines the width direction center position S4 of the material 16 with respect to the width press center position S2. The amount is calculated based on the camber amount of the front member 15 as the correction amount ΔS of the target side guide center position S1.

  Here, when the camber of the camber amount measured by the camber amount measuring unit 8 is generated in the front material 15, this occurs in the side guide device 2 which is to determine the center position S4 in the width direction of the material 16 this time. There is a positional shift of the side guide center position S1 corresponding to the camber with respect to the width press center position S2. Moreover, the amount of camber after the width reduction of the material to be rolled is smaller as the material width (length in the width direction D1) of the material to be rolled before width reduction is smaller, and the amount of width reduction of the material to be rolled by the width press 5 The larger the value, the larger.

  Therefore, based on the camber amount of the front material 15 measured by the camber amount measuring unit 8, the arithmetic processing unit 9 depends on the difference in material width and width reduction amount between the front material 15 and the current material 16 before the width reduction. The correction amount ΔS of the target side guide center position S1 is calculated in consideration of the change in the camber amount. Specifically, the arithmetic processing unit 9 compares the camber amount (measured value) of the front material 15 acquired from the camber amount measurement unit 8 with the camber due to the difference in material width between the front material 15 and the current material 16 before the width reduction. An amount correction process and a camber amount correction process based on a set width reduction amount between the front material 15 and the current material 16 are performed. The arithmetic processing unit 9 corrects the camber amount of the corrected front material 15 obtained by these correction processes, and corrects the side guide center position S1 when the side guide device 2 determines the width direction center position S4 of the material 16. Converted to the quantity ΔS. Thereby, the arithmetic processing unit 9 calculates the correction amount ΔS of the target side guide center position S1.

  Specifically, the arithmetic processing unit 9 sets, for example, the camber amount Cam0 of the front member 15 measured by the camber amount measuring unit 8, the material width W0 of the front member 15 before the width reduction, and the setting of the front member 15. Using the width reduction amount ΔW0, the material width W1 before the width reduction of the material 16 and the width reduction amount ΔW1 set for the material 16, the target side guide center position S1 based on the following equation (1): The correction amount ΔS is calculated. The arithmetic processing unit 9 transmits the obtained correction amount ΔS to the control unit 10 every time the correction amount ΔS is calculated in this way.

  However, in the equation (1), the tuning rate α is a coefficient for converting the camber amount Cam0 into the correction amount ΔS. The tuning rate α is, for example, a value set according to the length of the material to be rolled down (the length in the longitudinal direction D2) and the material feed amount during width reduction. The tuning rate β and the tuning rate γ are indexes indicating the ease of occurrence of camber with respect to the material width and width reduction amount of the material to be rolled during width reduction. The tuning rate β and the tuning rate γ are set according to, for example, the opening of the pair of side guides 3a and 3b, the width reduction force of the width press machine 5, and the mold shape of the pair of width press dies 6a and 6b. Value.

In the right side of the equation (1), the term (W1 / W0) ^β is a correction term for the camber amount Cam0 due to the difference between the material widths W0 and W1 before the width reduction between the front material 15 and the current material 16. The term (ΔW1 / ΔW0) ^γ is a correction term for the camber amount Cam0 due to the difference between the set width reduction amounts ΔW0 and ΔW1 between the front material 15 and the current material 16.

  In addition, the material width W0 before the width reduction of the front material 15, the width reduction amount ΔW0 set for the front material 15, the material width W1 before the width reduction of the current material 16, and the width reduction amount ΔW1 set for the current material 16 are: For example, it is provided to the arithmetic processing unit 9 from a process computer that manages the operation of the hot rolling line. The tuning rates α, β, and γ may be fixed values set in advance in the arithmetic processing unit 9 or may be variably input to the arithmetic processing unit 9 by an input unit (not shown) provided in the width reduction device 1. It may be a variable value.

  The control unit 10 controls the side guide center position S1 of the side guide device 2 when determining the width direction center position S4 of the material 16. Specifically, the control unit 10 controls the pair of guide driving units 4a and 4b based on the correction amount ΔS calculated by the arithmetic processing unit 9, and moves the pair of side guides 3a and 3b to the positive side in the width direction D1. Or operate on the negative side. As a result, the control unit 10 determines the side guide center position S1 of the side guide device 2 when the center position in the width direction of the front member 15 is determined by the correction amount ΔS by the arithmetic processing unit 9 as shown in FIG. Correct it. In this way, the control unit 10 controls the side guide center position S1 of the side guide device 2 when determining the width direction center position S4 of the material 16 to the target position.

  In the present embodiment, the target position is a target side guide center position where the camber amount after the width reduction of the material 16 by the width press machine 5 can be reduced as much as possible (preferably can be made zero). This target position does not necessarily coincide with the width press center position S2 when the camber amount resulting from the temperature deviation in the width direction D1 is included in the camber amount after the width reduction of the front member 15. That is, before the camber amount of the front member 15 due to the temperature deviation in the width direction D1 (hereinafter referred to as “the camber amount due to the temperature deviation”) is caused by the positional deviation between the side guide center position S1 and the width press center position S2. When the camber amount of the material 15 (hereinafter referred to as “the camber amount due to misalignment”) is too large to be ignored, the target position described above is caused by the temperature deviation without increasing the camber amount due to misalignment. The position is slightly shifted from the width press center position S2 in the direction of reducing the camber amount. On the other hand, when the camber amount due to the temperature deviation is small enough to be ignored as compared with the camber amount due to the positional deviation, the above-mentioned target position coincides with the width press center position S2.

  Further, the control unit 10 determines the width direction center position S4 of the material 16 by the pair of side guides 3a and 3b while maintaining the side guide center position S1 corrected to the target position as described above. The guide driving units 4a and 4b are controlled. In this way, the control unit 10 causes the side guide device 2 to perform a positioning operation for matching the width direction center position S4 of the material 16 before the width reduction and the above-described target position.

  On the other hand, the conveyance path 11 is for sequentially conveying a plurality of rolled materials in the hot rolling line. The transport path 11 is configured using a plurality of transport rolls (not shown). As shown in FIG. 1, a side guide device 2 and a width press machine 5 are arranged in the conveyance path 11 so as to be aligned in the conveyance direction of the material to be rolled such as the front material 15 and the material 16. Although not particularly shown in FIG. 1, a heating furnace is disposed on the upstream side of the conveyance path 11 with respect to the side guide device 2, and a rough rolling mill is disposed on the downstream side of the conveyance path 11 with respect to the width press machine 5. Has been. That is, the material to be rolled extracted from the heating furnace is sequentially transported along the transport path 11, passes through the side guide device 2 and the width press machine 5 in this order, and thereafter various hot rolling lines such as a roughing mill. Go through the facilities.

  In the present embodiment, the width direction D1 is the width direction of a material to be rolled (an example of a metal material to be subjected to width reduction) exemplified in the front material 15 and the material 16 shown in FIG. This is the same as the width direction, that is, the roll axis direction of the transport rolls constituting the transport path 11. In the width direction D1, for example, as shown in FIG. 1, the OP side of the transport path 11 is positive and the DR side is negative. The longitudinal direction D2 is the longitudinal direction of the material to be rolled, and is the same as the conveying direction of the material to be rolled along the conveying path 11 (see the thick arrow in FIG. 1). In the longitudinal direction D2, the tip side of the material to be rolled is positive and the tail end side is negative. These width direction D1 and longitudinal direction D2 are directions perpendicular to the thickness direction of the material to be rolled.

(Camber amount of material to be rolled)
Next, the camber amount after the width reduction of the material to be rolled in the embodiment of the present invention will be described. In the following, the camber amount Cam0 after the width reduction of the front material 15 shown in FIG. 1 will be exemplified to explain the definition of the camber amount after the width reduction of the rolled material in the present embodiment. The definition is the same for the material to be rolled other than the front material 15 such as the material 16.

  FIG. 2 is a diagram for explaining the camber amount after the width reduction of the material to be rolled in the embodiment of the present invention. As shown in FIG. 2, the camber amount Cam0 after the width reduction of the front member 15 is a bend on the positive side or the negative side (the negative side in FIG. 2) of the width direction D1 with respect to the longitudinal direction D2 of the front member 15 after the width reduction. Defined as a quantity.

  Specifically, in the present embodiment, the camber amount Cam0 is defined as the maximum value of the distance between the width direction center position S4 of the front member 15 after the width reduction and the reference position S5 of the front member 15. As shown in FIG. 2, the reference position S5 is represented by a straight line (reference line) passing through the width direction center position Wa of the front end portion 15a of the front member 15 and the width direction center position Wb of the tail end portion 15b. . In the example shown in FIG. 2, the camber amount Cam0 is the distance between the center position S4 in the width direction at the center position in the longitudinal direction D2 of the front member 15 and the reference position S5.

  The sign of the camber amount Cam0 (camber generation direction) is determined by the relationship between the width direction D1 and the displacement direction of the center position S4 in the width direction with respect to the reference position S5 of the front member 15. In the example shown in FIG. 2, the center position S4 in the width direction is shifted to the negative side in the width direction D1 with respect to the reference position S5. Therefore, the camber amount Cam0 has a negative value. Although not shown in particular, when the width direction center position S4 is shifted to the positive side in the width direction D1 with respect to the reference position S5, the camber amount Cam0 is a positive value.

(Mechanism of camber generation of rolled material)
Next, the mechanism of camber generation by width reduction of the material to be rolled in the embodiment of the present invention will be described. FIG. 3 is a diagram for explaining the mechanism of camber generation due to the width reduction of the material to be rolled in the embodiment of the present invention.

  As shown in FIG. 3, the material 17 to be subjected to width reduction is restrained by the pair of side guides 3 a and 3 b of the side guide device 2 before being subjected to width reduction by the width press 5. Thereby, the width direction center position of the to-be-rolled material 17 is determined so that it may correspond with side guide center position S1. Thereafter, the material to be rolled 17 is released from the restraint by the opening operation of the pair of side guides 3 a and 3 b, passes between the pair of side guides 3 a and 3 b, and enters the entrance side of the width press machine 5. Here, the side guide center position S1 when the side guide device 2 determines the center position in the width direction of the material to be rolled 17 is shifted to the OP side with respect to the width press center position S2 of the width press machine 5. In this case, the center position in the width direction of the material to be rolled 17 is shifted to the OP side with respect to the width press center position S2. In this case, when the material to be rolled 17 enters the entry side of the width press machine 5, it first contacts the OP side width press die 6a of the pair of width press dies 6a and 6b (state A1). .

  As illustrated in the state A1 of FIG. 3, when the material to be rolled 17 comes into contact with the OP side width press die 6a earlier than the DR side width press die 6b, the material to be rolled 17 is: It enters between the pair of width press dies 6a, 6b in a state inclined to the DR side (state A2). Thereafter, the material to be rolled 17 sequentially enters between the pair of width press dies 6a and 6b while maintaining the state inclined to the DR side.

  The width press machine 5 reciprocates the pair of width press dies 6a and 6b symmetrically about the width press center position S2, and the rolled material 17 in a state inclined to the DR side as described above, The width is reduced (width press) using these width press dies 6a and 6b over the entire length direction. As a result, the DR side portion of the material to be rolled 17 is elongated longer than the OP side portion, and a camber that bends to the DR side is generated in the material to be rolled 17 (state A3). Thus, the amount and direction of the camber generated in the material to be rolled 17 due to the width reduction are represented by the camber amount Cam0 of the front material 15 and its positive / negative sign.

  As illustrated by the states A1, A2 and A3 in FIG. 3, the side guide center position S1 when the center position in the width direction of the material to be rolled 17 (the front material 15 and the current material 16 and the like) is determined is the width press center position. When the position is shifted to the OP side with respect to S2, a camber that is bent to the DR side is generated in the material to be rolled 17 after the width reduction by the width press machine 5. On the other hand, when the side guide center position S1 when the center position in the width direction of the material to be rolled 17 is determined is shifted to the DR side with respect to the width press center position S2, the state A1 described above is not particularly illustrated. , A2, and A3, a camber that bends to the OP side is generated in the material to be rolled 17 after the width reduction by the width press 5 by the reverse mechanism.

(Side guide position control method for width reduction device)
Next, a side guide position control method of the width reduction device according to the embodiment of the present invention will be described. FIG. 4 is a flowchart showing an example of the side guide position control method of the width reduction device according to the embodiment of the present invention. In the side guide position control method for the width reduction device according to the embodiment of the present invention, the width reduction device 1 (see FIG. 1) sequentially executes steps S101 to S105 shown in FIG.

  That is, as shown in FIG. 4, the width reduction device 1 first measures the camber amount Cam0 due to the width reduction of the front material 15 (step S101). In step S101, the camber amount measurement unit 8 determines that the side guide device 2 determines the center position S4 in the width direction of the material 16 this time, for example, before the material 16 enters between the pair of side guides 3a and 3b. Then, the camber amount Cam0 of the front material 15 that was previously subjected to width reduction by the width press machine 5 is measured.

  Specifically, the camber amount measuring unit 8 optically detects the bent shape of the front material 15 in the width direction D1 by, for example, imaging the front material 15 sent to the exit side of the width press machine 5. . Next, the camber amount measuring unit 8 performs predetermined image processing or the like on the detected optical data such as an image of the front material 15, and thereby, the positive side of the width direction D1 with respect to the longitudinal direction D2 of the front material 15 or A bending amount toward the negative side (for example, a bending amount at the center position in the width direction of the front member 15 with respect to the conveyance path center position S3) is obtained. The camber amount measuring unit 8 measures the amount of bending of the front material 15 as a camber amount Cam0 (positive or negative value) due to the width reduction of the front material 15. The camber amount measuring unit 8 transmits the measured camber amount Cam0 to the arithmetic processing unit 9.

  After executing step S101, the width reduction device 1 calculates the correction amount ΔS of the side guide center position S1 to be corrected when determining the width direction center position S4 of the material 16 (step S102). In step S102, the arithmetic processing unit 9 calculates the material width and the width reduction amount before the width reduction between the front material 15 and the current material 16 based on the camber amount Cam0 of the front material 15 measured in step S101 described above. The correction amount ΔS of the target side guide center position S1 is calculated in consideration of the change in the camber amount due to the difference.

  Specifically, the arithmetic processing unit 9 acquires the camber amount Cam0 of the front material 15 from the camber amount measuring unit 8. Further, the arithmetic processing unit 9 uses a process computer or the like to set the material width W0 before the width reduction of the front material 15 and the width reduction condition when the width of the front material 15 is reduced by the width press machine 5. Width reduction amount ΔW0 (set value) of the material 16, the material width W1 before width reduction of the material 16 and the width of the material 16 set as the width reduction condition when the material 16 is width-reduced by the width press 5 A reduction amount ΔW1 (set value) is acquired. The arithmetic processing unit 9 obtains the camber amount Cam0 of the acquired front material 15, the material width W0 before the width reduction of the front material 15, the width reduction amount ΔW0 set for the front material 15, and the width reduction of the current material 16. Using the previous material width W1 and the width reduction amount ΔW1 set for the material 16, the correction amount ΔS of the target side guide center position S1 is calculated based on the above-described equation (1). The arithmetic processing unit 9 transmits the calculated correction amount ΔS to the control unit 10.

  After executing step S102, the width reduction device 1 controls the side guide center position S1 when the side guide device 2 determines the width direction center position S4 of the material 16 (step S103). In step S103, the control unit 10 corrects the side guide center position S1 of the side guide device 2 when the width direction center position of the front member 15 is determined by the correction amount ΔS calculated in step S102 described above, The side guide center position S1 of the side guide device 2 when determining the width direction center position S4 of the material 16 is controlled.

  Specifically, the control unit 10 acquires the calculated correction amount ΔS from the arithmetic processing unit 9. Next, the control unit 10 determines the distance between the pair of side guides 3a and 3b in a period from when the center position in the width direction of the front member 15 is determined to before the material 16 enters between the pair of side guides 3a and 3b. The side guide center position S1 is changed to a position (that is, a target position) shifted to the positive side or the negative side in the width direction D1 by the correction amount ΔS. Thereby, the control part 10 controls side guide center position S1 at the time of determining the width direction center position S4 of this material 16 to the target position.

  After executing step S103, the width reduction device 1 determines the center position in the width direction of the material 16 before width reduction using the pair of side guides 3a and 3b (step S104). In step S104, the side guide device 2 receives the material 16 between the pair of side guides 3a and 3b. The control unit 10 moves the pair of side guides 3a and 3b in the width direction with the side guide center position S1 after the change to the target position described above (hereinafter simply referred to as “the changed side guide center position S1”) as the center. The pair of guide driving units 4a and 4b are controlled so as to reciprocate in D1.

  In the side guide device 2, the distance (opening) between the pair of side guides 3 a and 3 b coincides with the material width of the material 16 around the changed side guide center position S <b> 1 based on the control by the control unit 10. The pair of side guides 3a and 3b are closed. Thereby, the side guide apparatus 2 restrains this material 16 between a pair of side guides 3a and 3b, and makes this width direction center position S4 of this material 16 correspond with side guide center position S1 after a change. In this way, the side guide device 2 determines the width direction center position S4 of the material 16 before the width reduction as the changed side guide center position S1 (target position). Thereafter, the side guide device 2 causes the pair of side guides 3a and 3b to have a predetermined value (for example, about 50 [mm]) as compared with the width of the material 16 by the action of the pair of guide driving units 4a and 4b. Open at large intervals. As a result, the side guide device 2 releases the restraint of the material 16 by the pair of side guides 3a and 3b. The material 16 advances toward the entry side of the width press machine 5 along the transport path 11 while maintaining the state where the center position S4 in the width direction coincides with the target position.

  After executing step S104, the width reduction device 1 reduces the width of the material 16 whose width direction center position S4 has been determined by the side guide device 2 in step S104 described above by the width press machine 5 (step S105). Exit.

  In step S105, the width press 5 determines that the material 16 (hereinafter abbreviated as “positioned material 16 after positioning”) determined so that the center position S4 in the width direction coincides with the target position as described above. The width press dies 6a and 6b are received. Next, the width press machine 5 reciprocates the pair of width press dies 6a and 6b symmetrically about the width press center position S2 in the width direction D1 by the action of the pair of mold drive units 7a and 7b. Let As a result, the width press machine 5 reduces the width of the post-positioning material 16 that is sequentially conveyed along the conveyance path 11 over the entire area in the longitudinal direction D2.

  The material 16 that has been subjected to the width reduction by the width press machine 5 corresponds to the front material for the subsequent rolled material to be positioned by the side guide device 2 from now on. Such a material 16 is measured in the camber amount Cam0 by the camber amount measuring unit 8 on the exit side of the width press machine 5 while being sequentially conveyed along the conveyance path 11, and then a hot rolling line such as rough rolling. The necessary processing in is performed. The width reduction device 1 repeatedly performs the above-described processes of steps S101 to S105 each time the width reduction of the material to be rolled is completed.

  Here, the control of the side guide center position S1 in step S103 described above will be specifically described. FIG. 5 is a diagram for specifically explaining the control of the side guide center position shifted to the OP side with respect to the width press center position. FIG. 6 is a diagram for specifically explaining the control of the side guide center position shifted to the DR side with respect to the width press center position. 5 and 6, “S1 (front material)” is a side guide center position S1 when the width direction center position of the front material 15 was previously determined (hereinafter referred to as “previous side guide center position S1”). Indicates. “S1 (current material)” indicates a side guide central position S1 (hereinafter referred to as “current side guide central position S1”) when the central position in the width direction of the current material 16 is determined this time.

  As shown in FIG. 5, when the previous side guide center position S1 is shifted to the OP side with respect to the width press center position S2, the width press machine 5 uses a pair of width press dies 6a and 6b. A camber that bends to the negative side in the width direction D1 occurs in the front material 15 that has been subjected to the width reduction. In this case, in step S103 described above, the control unit 10 sets the previous side guide center position S1 in the width direction D1 by the correction amount ΔS calculated by the arithmetic processing unit 9 using the negative camber amount Cam0 of the front member 15. Change to the negative side.

  On the other hand, as shown in FIG. 6, when the previous side guide center position S1 is shifted to the DR side with respect to the width press center position S2, the width press machine 5 moves the pair of width press dies 6a and 6b. The camber that bends to the positive side in the width direction D1 is generated in the front member 15 that has been width-reduced. In this case, in step S103 described above, the control unit 10 sets the previous side guide center position S1 in the width direction D1 by the correction amount ΔS calculated by the arithmetic processing unit 9 using the positive camber amount Cam0 of the front member 15. Change to the positive side.

  In any case shown in FIGS. 5 and 6, the control unit 10 determines that the position where the previous side guide center position S <b> 1 is changed is the current side guide center position S <b> 1, between the pair of side guides 3 a and 3 b. The side guide center position S1 is controlled. Thereby, the control part 10 can control this side guide center position S1 to the target position.

Example 1
Next, Example 1 of the present invention will be described. In Example 1, Inventive Example 1 was performed in order to verify the effect of the present invention. As conditions of Example 1 of the present invention, the metal material to be investigated (rolled material) has a material length of 6000 to 7000 [mm], a material thickness of 250 [mm], and a material width of 1000 to 1400 [mm]. ] A mild steel slab. Moreover, the width reduction apparatus of a hot rolling line is the width reduction apparatus 1 (refer FIG. 1) which concerns on embodiment of this invention, The width reduction amount of the slab by the width reduction apparatus 1 is 100-200 [mm]. It was. Further, in Expression (1) set in the arithmetic processing unit 9 of the width reduction device 1, the tuning rate α is set to 0.5, the tuning rate β is set to 0.8, and the tuning rate γ is set to 0.4.

  Moreover, in this invention example 1, the slab of investigation object was heated to 1200-1250 [degreeC] with the heating furnace of the hot rolling line. The width reduction device 1 repeatedly executes steps S101 to S105 shown in FIG. 4 for each heated slab that is sequentially conveyed along the conveyance path 11, and the side reduction based on the camber amount due to the width reduction of the slab. The center position in the width direction of the slab was determined while controlling the guide center position, and the slab whose width direction center position was determined was reduced in width.

  On the other hand, in Example 1, the comparative example 1 compared with the invention example 1 mentioned above was performed. In Comparative Example 1, as the width reduction device for the hot rolling line, regardless of the camber amount due to the width reduction of the slab, the center position of the side guide is determined to be constant and the center position in the width direction of the slab is determined. A conventional width reduction device for reducing the width of the determined slab was used. As conditions for Comparative Example 1, the dimensions (material length, material width, material thickness), steel type, heating temperature, and width reduction amount of the slab to be investigated were the same as those of Example 1 of the present invention.

  In each of Invention Example 1 and Comparative Example 1 described above, the number of slabs to be investigated is 1130, and the camber amount due to the slab width reduction when these slabs are sequentially flowed to the hot rolling line is reduced by the width reduction. The camber meter (for example, the camber amount measuring unit 8 shown in FIG. 1) installed on the outlet side of the apparatus measured sequentially. Further, the slab after the width reduction is sequentially conveyed along the conveyance path 11 and processed into a hot-rolled steel sheet by each equipment (rough rolling mill, finish rolling mill, etc.) of the hot rolling line, and then cooled in water and coiled. Rolled up. In Example 1, for each of Invention Example 1 and Comparative Example 1, the frequency distribution of the camber amount due to the width reduction of the slab, and the sheet passing trouble when continuously flowing the slab after the width reduction to the hot rolling line The presence or absence of was investigated.

  FIG. 7 is a diagram showing the investigation results of Example 1 of the present invention in Example 1. As shown in FIG. 7, in Example 1 of the present invention, the frequency distribution of the camber amount due to the width reduction of the slab was approximately in the range of −75 [mm] to 75 [mm]. The standard deviation σ of the frequency distribution was 35 [mm]. That is, in Example 1 of the present invention, the camber amount due to the width reduction of the slab could be controlled to approximately 75 [mm] or less on both the positive and negative sides in the width direction D1 of the slab.

  Here, in the hot rolling line used for the investigation, when the camber amount due to the width reduction of the slab exceeded 80 [mm], a plate passing trouble occurred in the slab after the width reduction. However, in Example 1 of the present invention, the camber amount due to the width reduction of the slab could be controlled to be approximately 75 [mm] or less on both the positive and negative sides in the width direction D1, and thus there was almost no trouble in passing through the slab after the width reduction.

  On the other hand, FIG. 8 is a diagram showing the investigation result of Comparative Example 1 in Example 1. As shown in FIG. 8, in Comparative Example 1, the frequency distribution of the camber amount due to the width reduction of the slab varied beyond the range of −75 [mm] or more and 75 [mm] or less. The standard deviation σ indicating this variation was 65 [mm]. That is, in Comparative Example 1, the amount of camber due to the slab width reduction could not be controlled to 75 [mm] or less on both the positive and negative sides in the slab width direction D1. In Comparative Example 1 as described above, the plate passing trouble frequently occurred in the slab after the width reduction.

  As can be seen by comparing FIGS. 7 and 8, in the first example of the present invention, the camber amount due to the width reduction of the slab can be reduced as compared with the first comparative example. The variation of about 46 [%] was able to be reduced. From this comparison result, it was found that in Example 1 of the present invention, the occurrence of camber during the slab width reduction and the occurrence of a slab passing trouble caused by the camber can be significantly suppressed as compared with Comparative Example 1.

(Example 2)
Next, a second embodiment of the present invention will be described. In Example 2, Inventive Example 2 was performed in order to verify the effect of the present invention. As the conditions of Example 2 of the present invention, the metal material to be investigated (rolled material) has a material length of 7000 to 8000 [mm], a material thickness of 275 [mm], and a material width of 800 to 900 [mm]. ] A mild steel slab. Moreover, the width reduction apparatus of the hot rolling line was the width reduction apparatus 1 similarly to the above-described Example 1 of the present invention, and the width reduction amount of the slab by the width reduction apparatus 1 was 150 to 200 [mm]. Further, in Expression (1) set in the arithmetic processing unit 9 of the width reduction device 1, the tuning rate α is 0.4, the tuning rate β is 0.5, and the tuning rate γ is 0.5. The other conditions of Invention Example 2 were the same as those of Invention Example 1 described above.

  On the other hand, in Example 2, the comparative example 2 compared with the invention example 2 mentioned above was performed. In Comparative Example 2, the same width reduction device (conventional width reduction device) as in Comparative Example 1 described above was used. As conditions for Comparative Example 2, the dimensions (material length, material width, material thickness), steel type, heating temperature, and width reduction amount of the slab to be investigated were the same as those of Example 2 of the present invention.

  In each of Invention Example 2 and Comparative Example 2 described above, the number of slabs to be investigated was 915, and the camber amount due to the width reduction of the slab when these slabs were sequentially flowed to the hot rolling line was reduced by the width reduction. The camber meter installed on the exit side of the device measured sequentially. Further, the slab after the width reduction is sequentially conveyed along the conveyance path 11 and processed into a hot-rolled steel sheet by each equipment (rough rolling mill, finish rolling mill, etc.) of the hot rolling line, and then cooled in water and coiled. Rolled up. In Example 2, for each of Invention Example 2 and Comparative Example 2, the frequency distribution of the camber amount due to the width reduction of the slab and the threading trouble when continuously flowing the slab after the width reduction to the hot rolling line The presence or absence of was investigated.

  FIG. 9 is a diagram showing the investigation result of Example 2 of the present invention in Example 2. As shown in FIG. 9, in Example 2 of the present invention, the frequency distribution of the camber amount due to the slab width reduction was within a range of −75 [mm] or more and 75 [mm] or less. The standard deviation σ of the frequency distribution was 34 [mm]. That is, in Example 2 of the present invention, the camber amount due to the width reduction of the slab could be controlled to 75 [mm] or less on both the positive and negative sides in the width direction D1 of the slab. In such Example 2 of the present invention, there was no trouble passing through the slab after the width reduction.

  On the other hand, FIG. 10 is a diagram showing the results of investigation of Comparative Example 2 in Example 2. As shown in FIG. 10, in Comparative Example 2, the frequency distribution of the camber amount due to the width reduction of the slab varied beyond the range of −75 [mm] or more and 75 [mm] or less. The standard deviation σ indicating this variation was 65 [mm]. That is, in Comparative Example 2, the amount of camber due to the slab width reduction could not be controlled to 75 [mm] or less on both the positive and negative sides in the slab width direction D1. In Comparative Example 2 as described above, troubles of passing plates frequently occurred in the slab after width reduction.

  As can be seen from comparison between FIGS. 9 and 10, in Example 2 of the present invention, the camber amount due to the width reduction of the slab can be reduced as compared with Comparative Example 2, and further, the variation in the camber amount is compared with Comparative Example 2. It was possible to reduce the variation of about 48 [%]. From this comparison result, it was found that in Example 2 of the present invention, the occurrence of camber during slab width reduction and the occurrence of a slab passing trouble caused by the camber can be significantly suppressed as compared with Comparative Example 2.

  As described above, in the embodiment of the present invention, the material to be rolled that has been previously subjected to width reduction by a width press before the material to be rolled (current material) whose center position in the width direction is currently determined by the side guide device. Measure the amount of camber due to the width reduction of the (previous material) and based on the measured amount of camber of the previous material, Taking the change into account, calculate the correction amount of the side guide center position of the side guide device, and correct the side guide center position when the side guide device determines the center position in the width direction of the front material by this calculated correction amount. Then, the side guide device controls the side guide center position when the center position in the width direction of the material is determined, and the material before width reduction using the pair of side guides in which the side guide center position is controlled in this way. Width The center position is determined, and the width reduction by the width press an equivalent timber after determining the width direction center position.

  For this reason, it is possible to appropriately correct the positional deviation of the center position of the side guide that causes camber due to width reduction in the front material according to the set values of the material width and width reduction amount before width reduction of this material. it can. As a result, the side guide center position when the side guide device determines the center position in the width direction of the material, the ideal side guide center position targeted for the material, that is, the camber amount due to the width reduction of the material. It is possible to control to a target position that can be reduced as much as possible. As a result, the camber that occurs when the width of the material is reduced due to the misalignment between the center position of the side guide and the center of the width press, and the temperature that occurs when the width of the material is reduced due to a temperature deviation in the width direction of the material. It is possible to suppress the occurrence of substantial camber due to the width reduction of the material including both the camber and the camber. From this, in each facility such as a rolling mill located at the subsequent stage of the width reduction device, it is possible to suppress as much as possible the occurrence of operation troubles of the material to be rolled after the width reduction.

  In the above-described embodiment, the left side of the conveyance path in the conveyance direction of the material to be rolled is the OP side, the right side is the DR side, and the camber amount of the material to be rolled that is bent to the OP side is a positive value. Although the camber amount of the rolled material that bends to the side is set to a negative value, the present invention is not limited to this. In the present invention, the positive / negative definition of the camber amount (that is, the definition of the camber generation direction) may be opposite to that described above (the OP side is negative and the DR side is positive). Moreover, the left side of the conveyance path toward the conveyance direction of the material to be rolled may be the DR side, and the right side may be the OP side.

  Moreover, in embodiment mentioned above, although rolled materials, such as a slab, were illustrated as an example of the metal material of width reduction object, this invention is not limited to this. In the present invention, the metal material to be subjected to width reduction may be a metal material that is subjected to width reduction while being sequentially conveyed in a production line such as a hot rolling line, for example, a rolled material such as a slab or a steel plate. It may be a steel material other than the material to be rolled, or a metal material other than the steel material (iron alloy material). Moreover, the manufacturing line to which this invention is applied should just be a manufacturing line including a width reduction process, and is not limited to a hot rolling line.

  Further, in the above-described embodiment, the parameters used for the calculation processing of the correction amount of the side guide center position, for example, the material width before the width reduction of the front material and the current material and the set width reduction amount are calculated from the process computer. However, the present invention is not limited to this. In the present invention, these parameters may be input to the arithmetic processing unit by an input unit provided in the width reduction device.

  Further, the present invention is not limited by the above-described embodiment, and the present invention includes a configuration in which the above-described constituent elements are appropriately combined. In addition, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on the above-described embodiments are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Width reduction apparatus 2 Side guide apparatus 3a, 3b Side guide 4a, 4b Guide drive part 5 Width press machine 6a, 6b Width press die 7a, 7b Mold drive part 8 Camber amount measurement part 9 Arithmetic processing part 10 Control part 11 Conveyance path 15 Front material 15a Tip 15b Tail end 16 Current material 17 Rolled material D1 Width direction D2 Longitudinal direction S1 Side guide center position S2 Width press center position S3 Conveyance path center position S4 Width direction center position S5 Reference position Wa Width Center of direction (tip of rolled material)
Wb Center position in the width direction (tail end of the material to be rolled)

Claims (4)

A side guide device that determines a center position in the width direction of the metal material before width reduction using a pair of side guides facing in the width direction of the metal material;
A width press machine for reducing the width of the metal material whose center position in the width direction is determined by the side guide device;
A camber amount measuring unit for measuring a camber amount of a front material that is a metal material that has been previously subjected to a width reduction by the width press before the present material that is a metal material whose center position in the width direction is currently determined by the side guide device; ,
Based on the camber amount of the front material measured by the camber amount measuring unit, taking into account the change in the camber amount due to the difference in material width and width reduction amount between the front material and the material before width reduction. An arithmetic processing unit that calculates a correction amount of a side guide center position that is a center position in the opposing direction of the pair of side guides;
The side guide center position of the side guide device at the time of determining the width direction center position of the front material is corrected by the correction amount calculated by the arithmetic processing unit, and the width direction center position of the material is determined. A control unit for controlling the center position of the side guide of the side guide device at the time,
A width reduction device comprising: The arithmetic processing unit includes the camber amount Cam0 of the front material measured by the camber amount measuring unit, the material width W0 of the front material before width reduction, the width reduction amount ΔW0 of the front material set, and the The correction amount ΔS of the side guide center position is calculated based on the following formula using the material width W1 before the width reduction of the material and the width reduction amount ΔW1 set for the material. Item 2. The width reduction device according to Item 1.

However, the tuning rate α is a coefficient for converting the camber amount Cam0 into the correction amount ΔS. The tuning rate β and the tuning rate γ are indexes indicating the ease of occurrence of camber with respect to the width of the metal material and the amount of width reduction during width reduction. The metal whose width direction center position of the metal material before width reduction is determined using a pair of side guides facing in the width direction of the metal material, and whose width direction center position is determined by the side guide device having the pair of side guides In the side guide position control method of the width reduction device that reduces the width by a width press machine,
A camber amount measuring step for measuring a camber amount of a front material that is a metal material that has been previously subjected to width reduction by the width press before the current material that is a metal material whose width direction center position is currently determined by the side guide device; ,
Based on the camber amount of the front material measured in the camber amount measurement step, taking into account the change in the camber amount due to the difference in material width and width reduction amount before the width reduction between the front material and the material. A calculation processing step for calculating a correction amount of a side guide center position that is a center position in the opposing direction of the pair of side guides;
The side guide center position of the side guide device at the time of determining the width direction center position of the front material is corrected by the correction amount calculated by the calculation processing step, and the width direction center position of the material is determined. A control step for controlling the center position of the side guide of the side guide device at the time,
A side guide position control method for a width reduction device. The calculation processing step includes the camber amount Cam0 of the front material measured by the camber amount measurement step, the material width W0 before the width reduction of the front material, the width reduction amount ΔW0 of the setting of the front material, The correction amount ΔS of the side guide center position is calculated based on the following formula using the material width W1 before the width reduction of the material and the width reduction amount ΔW1 set for the material. Item 4. A side guide position control method for a width reduction device according to Item 3.

However, the tuning rate α is a coefficient for converting the camber amount Cam0 into the correction amount ΔS. The tuning rate β and the tuning rate γ are indexes indicating the ease of occurrence of camber with respect to the width of the metal material and the amount of width reduction during width reduction.

Images