WO2019138908A1 - Procédé de laminage d'acier profilé, ligne de fabrication d'acier profilé et procédé de fabrication d'acier profilé - Google Patents

Procédé de laminage d'acier profilé, ligne de fabrication d'acier profilé et procédé de fabrication d'acier profilé Download PDF

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Publication number
WO2019138908A1
WO2019138908A1 PCT/JP2018/048177 JP2018048177W WO2019138908A1 WO 2019138908 A1 WO2019138908 A1 WO 2019138908A1 JP 2018048177 W JP2018048177 W JP 2018048177W WO 2019138908 A1 WO2019138908 A1 WO 2019138908A1
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Prior art keywords
rolling
rolling mill
torque
mill
mills
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PCT/JP2018/048177
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English (en)
Japanese (ja)
Inventor
和典 関
弘之 石橋
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日本製鉄株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 日本製鉄株式会社 filed Critical 日本製鉄株式会社
Priority to JP2019506208A priority Critical patent/JP6551625B1/ja
Priority to US16/771,941 priority patent/US20200338608A1/en
Priority to AU2018400555A priority patent/AU2018400555A1/en
Priority to EP18899047.7A priority patent/EP3702058A1/fr
Publication of WO2019138908A1 publication Critical patent/WO2019138908A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088—H- or I-sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/12—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a continuous process, i.e. without reversing stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/10—Endless rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B21B2265/06—Interstand tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control

Definitions

  • the present invention relates to, for example, a method of rolling a shaped steel for producing shaped steels such as H-shaped steel, T-shaped steel, and I-shaped steel, a production line of shaped steel, and a method of manufacturing shaped steel.
  • Patent Document 1 discloses a technique for performing tension control between stands of a continuous rolling mill. Specifically, in Patent Document 1, the relationship between the rolling torque, rolling load, front tension, and back tension of each rolling stand is linearly related, and the front tension and back tension are measured based on the measured values of the rolling torque and the rolling load. Control is performed by estimating and using the estimated value as a target value.
  • Patent Document 2 in a continuous rolling mill having two or more rolling mills, the current of the roll drive motor when the material to be rolled bites into the reference rolling mill is stored, and the next rolling is performed.
  • a technology is disclosed that performs speed control as compared to the current of a roll drive motor when a material to be rolled is caught in a machine.
  • Patent Document 3 discloses a technique of detecting only torque fluctuation due to forward tension between a plurality of stands of a tandem rolling mill, and controlling tension between the respective stands. Specifically, in Patent Document 3, the rolling torque of a state in which the material to be rolled does not bite into the downstream side stand at an arbitrary stand, and the rolling torque of the upstream side stand at that time, An arrangement for determining tension free torque is disclosed.
  • Patent Document 2 The technology described in Patent Document 2 is based on the premise that the tension between the rolling mill and the reference rolling mill can be controlled to no tension before the material to be rolled bites into the rear stage stand (the next rolling mill). If the distance between them is short, there is a possibility that it can not be applied.
  • Patent Document 3 is considered to be premised that the sum of rolling torques is constant regardless of tension, and when there is an error in the premise, an error occurs in the tension control between stands as well. There is a risk that the tension control may not be performed accurately. Further, the technology of Patent Document 3 is basically created on the premise of rolling of a wire rod or a steel plate, and an error may occur when it is applied to a shaped steel rolled by a universal rolling mill. The reasons will be briefly described below in [0011] to [0016].
  • tension control between stands of a tandem rolling mill is performed using following formula (1), (2).
  • the above equation is considered to be based on the assumption that the total rolling torque at the total stand is constant regardless of tension.
  • the rolling torque G at each stand can be derived from the relationships shown in the following equations (A1) and (A2).
  • equations (A1) and (A2) are based on the premise that the total work amount of all the stands is constant regardless of the tension state.
  • the tension changes the shape of the material to be rolled in the cross section, and the total amount of work changes.
  • tension T between each stand tension between the first and second stands is T12
  • tension between the second and third stands is denoted as T23
  • A12, A23, B12, B23 are It is an influence factor between each stand.
  • the above-described error also increases as the inter-stand tension T12 increases.
  • tension is applied (that is, T12> 0) to prevent passing defects during biting, so in the case of no tension when A12> B12
  • the second stand rolling torque G20 of the above is excessively calculated, and in the case of A12 ⁇ B12, the second stand rolling torque G20 without tension is excessively calculated.
  • FIG. 9 is a schematic explanatory view of the universal intermediate rolling of H-section steel, (a) is a front view, (b) is a plan view at two stands.
  • the rolling conditions were such that the web thickness t was 11.4 mm ⁇ 10.0 mm ⁇ 9.0 mm, and the flange thickness tf 17.2 mm ⁇ 14.8 mm ⁇ 13 mm.
  • FIG. 10 is a graph showing by numerical analysis the amount of change in torque (ton ⁇ m) of each stand when the tension (tonf) between the first stand R1 and the second stand R2 changes under such rolling conditions It is.
  • the influence coefficients A12 and B12 are the same, it is considered that the amount of change in torque of each stand is opposite in polarity and inclination is the same.
  • the inclination is different between the torque change amount of the first stand R1 and the torque change amount of the second stand R2, and it is understood that A12> B12. That is, when the tension control based on Patent Document 3 is performed under the rolling condition of such shape steel, the second stand rolling torque G20 in the absence of tension is underestimated.
  • the distance between the stands of a plurality of stands may be shortened in an effort to make the equipment compact.
  • tandem rolling if the distance between the stands is shortened, a state occurs in which the material to be rolled bites into the downstream stand before the distance between the upstream rolling stands is controlled to no tension, and the above-described tension control technology Such prior art may not be applicable.
  • the object of the present invention is the conditions under which the distance between stands is short when rolling a shaped steel using a continuous rolling mill consisting of three or more rolling mills in a tandem state. Even with a simple control system that does not use table values for each rolling condition, it is possible to control the tension between stands with high accuracy, and to achieve the stabilization of the material passing and the improvement of the product dimensional accuracy. It is an object of the present invention to provide a method, a production line of shaped steel and a method of producing shaped steel.
  • one or more rolling mills when performing tandem rolling in a rolling mill row composed of at least three or more n rolling mills, one or more rolling mills may use horizontal roll side surfaces and the like. It is a rolling method of shaped steel which performs pressure reduction with a persimmon roll peripheral surface, and about each rolling mill Ri of the rolling mill row, after a rolling material bites in the rolling mill Ri, and, Before the material to be rolled bites into the rolling mill Ri + 1 located downstream of the rolling mill Ri, the rotational speed of the rolling mill Ri is fixed, and the rolling torque Gi of the rolling mill Ri at that time is stored as Gi *.
  • the rolling torque Gn-1 of the rolling mill Rn-1 located upstream of the rolling mill Rn is rolled to the rolling mill Rn Rolling of the rolling mill Rn-1 before the material bites
  • the rolling torque Gn-2 of the rolling mill Rn-2 located upstream of the rolling mill Rn-1 is stored before the rolling mill Rn-2 before the material to be rolled bites into the rolling mill Rn-1.
  • the rolling speed of the rolling mill Rn-1 is controlled to be equal to Gn-2 * stored as the rolling torque of a rolling torque, and the rolling torque Gn ** in which the rolling torque Gn of the rolling mill Rn is stored
  • a second control step of controlling the number of revolutions of the rolling mill Rn to be equal the second control step is applied to all the rolling mills Ri, and the rolling torque G1 of the uppermost rolling mill R1 is ,
  • the rolling method of a shaped steel is provided, characterized in that the number of revolutions of each rolling mill Ri of the rolling mill row is controlled to be equal to G1 * stored as the rolling torque of the rolling mill R1 before biting. Be done.
  • i is an arbitrary integer of 1 to n
  • n is an integer of 3 or more.
  • rolling After controlling the rotation speed of all the rolling mills Ri of the row of rolling mills, rolling may be performed by fixing the rotation speed ratio of each rolling mill Ri.
  • the rolling speed of the rolling mill Rn on the most downstream side of the row of rolling mills may be increased to a desired speed while fixing the rotational speed ratio of each rolling mill Ri.
  • a rolling mill train composed of at least 3 or more n rolling mills and a rolling mill or rolling mill train of at least one or more mills are arranged in this order in tandem.
  • the downstream rolling mill or rolling mill train has an upstream rolling mill row with a sufficient distance for the rolling material to bite
  • a downstream rolling mill or rolling mill train is disposed, and the rolling mill method described above is implemented independently of the upstream rolling mill train and the downstream rolling mill or rolling mill train.
  • a production line of shaped steel is provided.
  • a method of producing a shaped steel by reducing the pressure between the side surface of the horizontal roll and the circumferential surface of the scissor roll comprising at least three or more n rolling mills.
  • a row of rolling mills for each rolling mill Ri, after the material to be milled bites into the rolling mill Ri and before the material to be milled bites into the rolling mill Ri + 1 located downstream of the rolling mill Ri
  • the rotation speed of the rolling mill Ri is fixed, the rolling torque Gi of the rolling mill Ri at that time is stored as Gi *, and after the material to be rolled bites into the rolling mill Rn on the most downstream side of the row of rolling mills
  • the rolling torque Gn-1 of the rolling mill Rn-1 located upstream of the rolling mill Rn is stored as the rolling torque of the rolling mill Rn-1 before the material to be rolled bites into the rolling mill Rn.
  • the rotation speed of the rolling mill Rn is equal to 1 *
  • a first control process to control, and a rolling torque Gn ** of the rolling mill Rn after the first control process are stored, and then, rolling of a rolling mill Rn-2 located upstream of the rolling mill Rn-1 is performed.
  • the rolling mill Rn-1 is such that the torque Gn-2 is equal to Gn-2 * stored as the rolling torque of the rolling mill Rn-2 before the material to be rolled bites into the rolling mill Rn-1.
  • the second control step is applied to all the rolling mills Ri, and the rolling torque G1 of the most upstream rolling mill R1 is before the rolling mill R2 located downstream of the rolling mill R1 is engaged with the rolling mill R1.
  • each rolling condition With a simple control system that does not use table values etc., it becomes possible to control the tension between the stands with high accuracy, and to achieve stabilization of threading and improvement of product dimensional accuracy.
  • FIG. 1 It is a schematic explanatory drawing about the manufacturing line of H section steel. It is a schematic explanatory drawing of a universal rolling mill and an edger rolling mill. It is the plane schematic of a rolling mill row which consists of three rolling mills R1-R2-R3. It is a schematic explanatory drawing regarding tension control in case distance between stands is long. It is a schematic explanatory drawing at the time of applying conventional tension control, when distance between stands is very short. It is a schematic explanatory drawing at the time of applying tension control concerning the present invention, when distance between stands is very short. FIG.
  • FIG. 10 is a schematic explanatory view showing a combination of a rolling mill row consisting of rolling mills R1 to R3 in proximity and a rolling mill at a downstream position sufficiently separated from the rolling mill row.
  • FIG. It is a schematic explanatory drawing of the universal intermediate
  • the "universal rolling mill” in this specification refers to a rolling mill that performs rolling with large stretching using a horizontal roll and a skewer roll at the time of shape steel rolling, and “edger rolling” in combination with the universal rolling mill It is intended to refer to rolling mills used for extremely light rolling, and in the present specification they are sometimes referred to as “rolling stands” or simply “stands”.
  • FIG. 1 is an explanatory view of a production line L on which the method of rolling a shaped steel according to the present embodiment is performed.
  • a heating furnace 2 rough rolling mills 4, two intermediate universal rolling mills 5, 6, and a finishing universal rolling mill 8 are arranged in order from the upstream side in a production line L.
  • an edger rolling mill 9 is provided between the two intermediate universal rolling mills 5 and 6.
  • steel materials in the production line L may be collectively referred to as “rolled material S” for the sake of description, and the shapes thereof may be illustrated using broken lines, oblique lines, and the like as appropriate in each drawing.
  • the material S to be rolled such as the slab 11 extracted from the heating furnace 2 is roughly rolled in the rough rolling mill 4.
  • the intermediate universal rolling is performed in the intermediate universal rolling mills 5 and 6.
  • the edger rolling machine 9 applies a pressure to the end portion (flanged portion 12) of the material to be rolled.
  • approximately 4 to 6 hole types are engraved on the rolls of the rough rolling mill 4 (a plurality of machines may be installed), and reverse rolling of a plurality of passes is performed via these.
  • the H-shaped rough section 13 in a dog bone shape is formed by using a rolling mill row comprising the first middle universal rolling mill 5-edger rolling machine 9-the second middle universal rolling mill 6 Thus, multiple passes of pressure are applied to shape the intermediate material 14. Then, the intermediate material 14 is finish-rolled into a product shape in a finish universal rolling mill 8 to produce an H-shaped steel product 16.
  • the rolling mill row consisting of the first intermediate universal rolling mill 5-edger rolling mill 9-the second intermediate universal rolling mill 6 is used to reduce a plurality of passes with respect to the H-shaped rough section 13
  • the flange tip end is not pressed (refer to the broken line in the figure), so as shown in FIG. 2 (b).
  • rolling is performed so as to shape and press the unreduced portion with an edger rolling mill.
  • the configuration of the first intermediate universal rolling mill 5-edger rolling mill 9-second intermediate universal rolling mill 6 as described above is an example of a continuous rolling mill row for rolling a material to be rolled in a tandem state.
  • a rolling mill row having a configuration in which a plurality of such rolling stands are continuously arranged when rolling shaped steel as the material to be rolled S, since the rigidity of the material to be rolled is large, the looper used during steel strip rolling etc. It is difficult to control the tension between rolling stands using a (tension control device).
  • tension between the stands tends to be pulled when biting. It is common to set to a certain rotation speed. That is, in order to maintain a good product size in rolling of shaped steel, it is required to suitably control the tension between the stands after the material is caught.
  • the distance between the stands of the plurality of stands may be shortened for energy saving, cost saving and downsizing of equipment.
  • the distance between stands is shortened, there is a risk that the material to be rolled may bite into the downstream stand before the distance between the upstream rolling stands is controlled to no tension.
  • the control such as pulling tension between the stands as usual may not be stable.
  • the tension between the stands is controlled with high accuracy, the material passing is stabilized and the product dimensions There is a need for a technology that can improve the accuracy.
  • the configuration of the first intermediate universal rolling mill 5-edger rolling mill 9-the second intermediate universal rolling mill 6 is described as the continuous rolling mill row (see FIG. 2), but the present invention
  • the tension control method can be applied to any rolling mill as long as a plurality of rolling mills (stands) are continuously arranged in a facility that performs tandem rolling of shaped steel. Therefore, hereinafter, a conventional tension control method and a case where the tension control method according to the present invention is applied to a rolling mill train in which three stands of R1 to R3 are continuously arranged will be described as an example.
  • the present configuration is an example, and the tension control method according to the present invention is applicable to a row of rolling mills in which at least three or more rolling mills are in a tandem rolling state.
  • FIG. 3 is a schematic plan view of the rolling mill row 30 consisting of three rolling mills R1-R2-R3.
  • the distance between stands of three rolling mills (rolling stands) of R1, R2 and R3 is a distance shorter than the length in the longitudinal direction of the material S to be rolled, and so-called tandem rolling causes rolling of the material S to be rolled It will be.
  • the tension control method according to the present invention is applied, the distance between the stands is sufficiently short compared to the rolling speed of the material to be rolled S, that is, before being caught in the downstream stand.
  • FIG. 4 is a schematic explanatory view related to tension control when the distance between stands is long, and is a schematic view showing a change in rolling torque (solid line) and a change in rotational speed (one-dot chain line) of each rolling mill R1 to R3.
  • each rolling torque of R1 to R3 is defined as G1 to G3 as a value which changes with time, and each rolling torque value at a specific time point is described as an individual value such as "G1 *".
  • the schematic about the position of the to-be-rolled material S in the situations A and B in the said schematic diagram (FIG. 4) is collectively described in FIG.
  • the tension control in the case where the distance between the stands is long will be described with reference to FIG.
  • a configuration in which the distance between the stands is extremely short indicates a configuration in which the material S to be rolled is caught in the downstream stand before the distance between the upstream rolling stands is controlled to be in a non-tension state.
  • FIG. 5 is a schematic explanatory view when the conventional tension control is applied when the distance between stands is extremely short, and shows the change in rolling torque (solid line) and the change in rotational speed (one-dot chain line) of each rolling mill R1 to R3. It is a schematic diagram. In addition, also in FIG. 5, the schematic about the position of the to-be-rolled material S in the situations A and B in the said schematic diagram (FIG. 5) is described collectively. A case where conventional tension control is applied in a configuration in which the distance between stands is extremely short will be described with reference to FIG.
  • the conventional tension control technology is used in the rolling mill train 30 including three rolling mills R1-R2-R3, when the distance between the stands is sufficiently long.
  • suitable tension control is possible by application (refer to FIG. 4)
  • the conventional tension control technology can not realize suitable tension control (refer to FIG. 5) in the configuration where the distance between stands is extremely short.
  • FIG. 6 is a schematic explanatory view when the tension control according to the present invention is applied when the distance between stands is extremely short, and shows the rolling torque change (solid line) and rotational speed change (dashed dotted line) of each rolling mill R1 to R3. It is a schematic diagram shown. In FIG. 6, a schematic view of the position of the material to be rolled S in the situations A to C in the schematic view (FIG. 6) is also shown. The case where tension control according to the present invention is applied to a configuration in which the distance between stands is extremely short will be described with reference to FIG.
  • the measurable rolling torque is stored, and a simple control system is a tension over the entire length of the rolling mill train 30 consisting of R1-R2-R3. Control can be implemented with high accuracy.
  • each rolling mill constituting a rolling mill row consisting of n rolling mills is R1, R2,... Rn, and the i-th rolling mill among them is Ri, Ri.
  • the rolling torque is defined as Gi. That is, i is an arbitrary integer of 1 to n, and n is an integer of 3 or more.
  • the rolling torque Gn ** of the rolling mill Rn after tension control stabilization in the first control step is stored.
  • the rolling torque Gn-2 of the rolling mill Rn-2 located upstream of the rolling mill Rn-1 is stored as the rolling torque of the rolling mill Rn-2 before the material to be rolled bites into the rolling mill Rn-1.
  • the rotation speed of the rolling mill Rn-1 is controlled to be equal to Gn-2 *, and the rolling torque Gn of the rolling mill Rn maintains the rolling torque Gn ** stored in the above 3).
  • the rotational speed of the rolling mill Rn is controlled (second control step).
  • the rolling torque Gn-1 ** of the rolling mill Rn-1 is stored after tension control settling.
  • the second control step is performed on each rolling mill so as to sequentially go back upstream. That is, for each rolling mill Rn-1, Rn-2, ... R1, the rolling torque Gi of the rolling mill immediately before the rolling mill becomes the rolling torque Gi * stored before the rolling mill bites into the rolling mill. So that the rolling torques Gi + 1 to Gn of the rolling mills Ri + 1 to Rn downstream of the rolling mills maintain the rolling torques Gi + 1 ** to Gn ** stored after tension settling. By controlling the rotational speed of Ri + 1 to Rn, the non-tensioned state can be realized similarly between the respective rolling mills after control.
  • the rolling torque G1 of the most upstream rolling mill R1 is equal to G1 * stored as the rolling torque of the rolling mill R1 before it bites into the rolling mill R2 located downstream of the rolling mill R1
  • the rotation speed of each rolling mill Ri of the row of rolling mills is controlled to be as follows.
  • the interlock control step is to control the rotational speed so as to maintain i + 1 to n).
  • tension control is performed so as to trace back to the upstream one by one, and finally control is performed to the most upstream rolling mill R1. It is possible to carry out tension control such that each rolling mill is in a non-tensioned state for the entire train of machines.
  • the temperature change at the time of rolling of the material to be rolled S is not particularly mentioned.
  • the temperature of the material to be rolled S changes with time when performing tandem rolling in a rolling mill row consisting of a plurality of rolling mills such as R1-R2-R3.
  • the rolling torque of each rolling mill may fluctuate with the temperature change. If the above-mentioned tension control method is applied without considering the fluctuation of the rolling torque due to the temperature change, an error associated with the fluctuation may occur.
  • the mill rigidity of the row of rolling mills is sufficiently large with respect to the temperature change.
  • the rotational speed ratio of each rolling mill in the stationary state may be fixed.
  • the non-tensioned state statically determined state
  • the rolling speed of the other rolling mill is determined so that the above-mentioned rotational speed ratio becomes the same ratio according to the rolling speed of the most downstream rolling mill, with the most downstream rolling mill downstream of rolling being the desired speed. Just do it.
  • FIG. 7 is a schematic explanatory view showing a combination of a rolling mill row 30 consisting of rolling mills (stands) R1 to R3 in close proximity and a rolling mill F1 at a downstream position sufficiently separated from the rolling mill row 30.
  • the tension control method described in the above embodiment is applied, the tension from R1 to R3 is settled, and then the material to be rolled is
  • G3 ** the rolling torque of R3 after settling
  • FIG. 8 shows a second row of rolling mills 30 including rolling mills R1 to R3 close to each other, and second rolling mills including rolling mills F1 to F3 close to each other at a downstream position sufficiently separated from the rolling mill row 30.
  • FIG. 6 is a schematic explanatory view showing a combination with a train of machines 50.
  • the tension control method described in the above embodiment is applied, and the tension from R1 to R3 is settled and F1 is rolled. Before the material S bites in, the rotational speed of R1 to R3 is fixed.
  • the timing at which the rolling torque is stored is set 0.1 seconds before the biting of the downstream stand because the rolling speed is estimated from the distance between the stands and the roll speed, and the time to bite into the downstream stand of the material to be rolled
  • the estimation timing is added to prevent the storage timing of the rolling torque from being after the downstream stand bites.
  • 0.5 seconds after start of control at the downstream stand biting time is a time required to avoid a transient state such as recovery from a drop in rotation speed (impact drop) due to biting.
  • the calculation timing of the non-tension torque Gj0 is 0.1 seconds before biting in the downstream stand because the rolling speed is estimated from the distance between the stands and the roll speed, and the time to bite in the downstream stand of the material to be rolled
  • the estimation timing is taken into consideration in order to estimate the following, so that the storage timing of the rolling torque will not be after the downstream stand bites.
  • the present invention is applicable to, for example, a method of rolling a shaped steel for producing a shaped steel such as an H-shaped steel, a T-shaped steel, or an I-shaped steel, a production line of shaped steel and a method of manufacturing shaped steel.

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  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
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Abstract

Selon la présente invention, pour chaque machine de laminage, un couple de laminage Gi avant la morsure au niveau d'une cage en aval est stocké, la vitesse de rotation au niveau d'une cage la plus en aval Rn est régulée de façon à satisfaire à Gn-1=Gn-1* après la morsure au niveau de la cage la plus en aval Rn et un couple de laminage Gn** de Rn après la correction de tension est stocké. Ensuite, la vitesse de rotation d'une machine de laminage Ri est régulée de manière à satisfaire à Gi=Gi * vers le côté amont et la vitesse de rotation d'une machine de laminage Rk sur le côté en aval de la machine de laminage Ri est régulée de manière à maintenir la relation Gk=Gk** (k=1+1 à n) et le couple de laminage d'une machine de laminage la plus en amont R1 est régulé pour être égal au G1* stocké. Ainsi, même dans des conditions de petites distances entre les cages, la tension entre les cages est régulée avec une grande précision dans un système de régulation simple qui n'utilise pas de valeurs de table pour chaque condition de laminage et la stabilisation d'un matériau qui passe et l'amélioration des dimensions du produit sont obtenues.
PCT/JP2018/048177 2018-01-10 2018-12-27 Procédé de laminage d'acier profilé, ligne de fabrication d'acier profilé et procédé de fabrication d'acier profilé WO2019138908A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2019506208A JP6551625B1 (ja) 2018-01-10 2018-12-27 形鋼の圧延方法、形鋼の製造ライン及び形鋼の製造方法
US16/771,941 US20200338608A1 (en) 2018-01-10 2018-12-27 Rolling method of shaped steel, production line of shaped steel, and production method of shaped steel
AU2018400555A AU2018400555A1 (en) 2018-01-10 2018-12-27 Shaped steel rolling method, shaped steel manufacturing line, and shaped steel manufacturing method
EP18899047.7A EP3702058A1 (fr) 2018-01-10 2018-12-27 Procédé de laminage d'acier profilé, ligne de fabrication d'acier profilé et procédé de fabrication d'acier profilé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018001784 2018-01-10
JP2018-001784 2018-01-10

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JPS5334586A (en) 1976-09-10 1978-03-31 Ishikawajima Harima Heavy Ind Method of and apparatus for detecting surface flaw
JPS613564A (ja) 1984-06-15 1986-01-09 Canon Inc 画像記録装置
JP2005262256A (ja) * 2004-03-17 2005-09-29 Jfe Steel Kk 形鋼の寸法制御方法及び形鋼の寸法制御機構
JP2008183594A (ja) 2007-01-31 2008-08-14 Jfe Steel Kk 連続圧延機のスタンド間張力制御方法および装置
JP2018001784A (ja) 2016-06-27 2018-01-11 日産自動車株式会社 車両用上開きドアのストラップ固定構造

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FR2853570B1 (fr) * 2003-04-11 2005-07-01 Vai Clecim Procede et dispositif de regulation de l'epaisseur d'un produit lamine
DE102006048427B3 (de) * 2006-10-12 2008-05-21 Siemens Ag Walzanlage, nachgerüstete Walzanlage, Walzwerk oder Walzstraße, Verfahren zum Ansteuern einer Walzanlage und Verwendung eines ersten Gerüsts einer Walzanlage
DE102008011275A1 (de) * 2008-02-27 2009-09-10 Siemens Aktiengesellschaft Betriebsverfahren für eine mehrgerüstige Walzstraße mit Banddickenermittlung anhand der Kontinuitätsgleichung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5334586A (en) 1976-09-10 1978-03-31 Ishikawajima Harima Heavy Ind Method of and apparatus for detecting surface flaw
JPS613564A (ja) 1984-06-15 1986-01-09 Canon Inc 画像記録装置
JP2005262256A (ja) * 2004-03-17 2005-09-29 Jfe Steel Kk 形鋼の寸法制御方法及び形鋼の寸法制御機構
JP2008183594A (ja) 2007-01-31 2008-08-14 Jfe Steel Kk 連続圧延機のスタンド間張力制御方法および装置
JP2018001784A (ja) 2016-06-27 2018-01-11 日産自動車株式会社 車両用上開きドアのストラップ固定構造

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US20200338608A1 (en) 2020-10-29
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JP6551625B1 (ja) 2019-07-31
JPWO2019138908A1 (ja) 2020-01-23

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