WO2001019543A1 - Procede de laminage a chaud de pieces metalliques - Google Patents

Procede de laminage a chaud de pieces metalliques Download PDF

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Publication number
WO2001019543A1
WO2001019543A1 PCT/JP1999/005043 JP9905043W WO0119543A1 WO 2001019543 A1 WO2001019543 A1 WO 2001019543A1 JP 9905043 W JP9905043 W JP 9905043W WO 0119543 A1 WO0119543 A1 WO 0119543A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal piece
joining
rolling
finish
subsequent
Prior art date
Application number
PCT/JP1999/005043
Other languages
English (en)
Japanese (ja)
Inventor
Takeshi Hirabayashi
Shigeru Isoyama
Takahiro Yamasaki
Hideyuki Nikaido
Original Assignee
Kawasaki Steel Corporation
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.)
Filing date
Publication date
Priority to JP07163098A priority Critical patent/JP3478119B2/ja
Priority claimed from JP07163098A external-priority patent/JP3478119B2/ja
Application filed by Kawasaki Steel Corporation filed Critical Kawasaki Steel Corporation
Priority to US09/807,903 priority patent/US6449996B1/en
Priority to CA002351605A priority patent/CA2351605C/fr
Priority to PCT/JP1999/005043 priority patent/WO2001019543A1/fr
Priority to AU56520/99A priority patent/AU765739B2/en
Priority to KR10-2001-7005968A priority patent/KR100515177B1/ko
Priority to EP99943361A priority patent/EP1132154A4/fr
Publication of WO2001019543A1 publication Critical patent/WO2001019543A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/08—Batch rolling
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills

Definitions

  • the present invention relates to a method for hot rolling metal strips, and more particularly to a method for joining several to several tens of metal strips such as sheet bars, slabs, billets or blooms, and performing continuous rolling.
  • the present invention relates to a method for hot rolling a piece. Background art
  • joining For this reason, recently, prior to finish rolling, the rear end and the front end of a metal piece to be rolled are joined (hereinafter referred to as “joining”) and continuously supplied to a hot rolling line for rolling.
  • the dress rolling method has been adopted.
  • hot rolling equipment capable of performing the above-mentioned endless rolling, for example, Japanese Unexamined Patent Publication No. Hei 7 (1995) -241601, as shown in FIG. From the three-roller rolling mill group 22 of R1 to R3, winding and rewinding device 70, leveler 72, centering guide 74, crop shear 30 for joining, metal Mobile joining equipment (welding machine) 40, Crop shear 24, for example, a 7-stand finishing rolling mill group 26 from F1 to F7, which runs in synchronization with the transport of the pieces. For example, a hot rolling line provided with two winders 28 is disclosed.
  • Japanese Patent Application Laid-Open No. H07-107007 discloses, as shown in FIG. Multiple lifting table rollers that are supplied with balanced hydraulic pressure from hydraulic pipes connected by connecting pipes 6 6 Forces Depressed by guides 45 A and 45 B attached to the welding device in conjunction with the travel of the welding device 40 There is disclosed an apparatus that avoids collision between a table roller and a joining device by being raised to an original metal piece supporting height by a balance hydraulic pressure.
  • Japanese Patent Application Laid-Open No. 11-169926 also discloses that a preceding metal piece and a following metal piece are joined together, and the subsequent metal piece scheduled for endless rolling, in which the preceding metal piece and the following metal piece are rolled, is joined to the preceding metal piece and the following metal piece.
  • the slab is endlessly designed to enable quick and accurate setting changes when changing to batch rolling in which rolling is performed without any inconvenience, and to prevent operation problems and defective coils due to inaccurate setting changes and delays in setting changes. If the slab is to be rolled, determine both the rolling conditions for endless rolling and the rolling conditions for batch rolling in advance and calculate the operating conditions at various points in the hot rolling line. A method is disclosed in which both the operating conditions for endless rolling and the operating conditions for batch rolling are performed.
  • the present invention has been made to solve the above-mentioned conventional problems, and has an object to cope with the case where the above three abnormalities occur. Disclosure of the invention
  • the present invention is capable of joining the leading end of the following metal piece to the tail end of the preceding metal piece on the entry side of the finish rolling mill, and finish-rolling the succeeding metal piece and the preceding metal piece continuously.
  • the above-mentioned succeeding metal piece can be finish-rolled continuously with the preceding metal piece before the joining and after the joining during the joining.
  • the joining is stopped or the joint is cut off.
  • the rolling process finish rolling, winding, hot run cooling, etc., and other processes related to all devices downstream of the joining device) are performed by setting the conditions for batch rolling in the downstream device including the joining device.
  • the hot rolling method of a metal piece by a hot rolling equipment capable of performing when it is determined that it is impossible to finish-roll the subsequent metal piece continuously with the preceding metal piece, When the two metal pieces are still separated from each other, the joining between the leading end of the following metal piece and the tail end of the preceding metal piece is stopped, and the two metal pieces are incompletely joined.
  • the region including the joining portion is cut off between the joining device and the finishing mill, and for a downstream joining facility including the joining device, the tip of the following metal piece
  • the present invention has solved the above-mentioned problem by making a state in which a sheet can be passed, and inserting at least the leading end of the following metal piece by setting a finishing mill for patch rolling.
  • the present invention performs the joining when it is determined that the subsequent metal piece cannot be finish-rolled continuously with the preceding metal piece before joining. After the tail end of the preceding metal piece has passed through the finish rolling mill, the leading end of the following metal piece is passed to the finish rolling mill.
  • the above problem was solved by setting a finishing mill for batch rolling in order to make it fit, and then passing the tip of the following metal piece through the joining equipment and making it into a finishing mill. Things. (Invention 3)
  • the present invention determines whether or not the finish-rolling of the succeeding metal piece and the preceding metal piece can be continuously performed by determining whether or not the bonding has been normally performed after the bonding, and the determination result.
  • the region including the joining portion is cut off between the joining device and the finishing mill, and at least the leading end of the subsequent metal piece is cut by setting a finishing mill for batch rolling.
  • the above-mentioned problem has been solved by incorporating the above.
  • the equipment that is in the middle of transportation from the welding device to the joint cutting means should be installed so that even if the joint breaks during transportation, the leading end of the subsequent metal piece will not hit and become unable to transport. Is preferably in a state where it can be passed. (Invention 4)
  • the present invention conveys the incompletely joined joint portion of the preceding metal piece and the succeeding metal piece in synchronization with the traveling speed of the joining device, and the joining device travels to the most downstream of the traveling zone.
  • the preceding metal piece and the following metal piece may not be stopped at that time, and may be transported as they are at the transport speed of the preceding metal piece whose tip is already rolled by the finishing mill.
  • Invention 5 Generally, in endless rolling, the first end of the endless rolling is rolled to a thicker thickness so that a finishing mill can be passed through, and the leading end is subjected to finish rolling. After passing through the mill, the running thickness of the finishing mill is changed and the thinner one is rolled.
  • the joining is stopped at the end of the subsequent metal piece after the second endless rolling, or the incomplete joint is cut off and the end is rolled into the finish rolling mill.
  • the finished plate thickness is too thin as planned, and the plateability may become unstable and rolling may not be possible.
  • a sheet thickness range that can be batch-rolled is set in advance, and if the scheduled finish sheet thickness of the succeeding metal piece is not within the sheet thickness range, the following metal piece is used. It is preferable to change the finish plate thickness of at least the leading end to a value within the above-mentioned range of the plate thickness and perform the finish rolling.
  • the present invention is characterized in that, when it is determined that the subsequent metal piece cannot be finish-rolled continuously with the preceding metal piece, the joining device is mounted on a bogie, and the bogie travels. At this time, the lifting table roller is not pushed down after passing through the bogie while sequentially pushing down as the bogie advances with the entry table press guide and the outgoing table press guide of the joining device lowered. In the case of a joining device that is sequentially returned to its original height and moves, after the above-mentioned joining is stopped or incompletely completed, the bogie is moved to the above-mentioned position when the exit-side table holding guide is at the ascending limit.
  • the tip of the following metal piece after cutting the table gap is creeped down. Stop the joining device at a position where there is no need to create a situation in which the sheet rolls in between the table rolls, and raise the table holding guide at least on the downstream side (for the joining device, the outgoing side).
  • the row metal piece can be conveyed without stopping at that time at the conveying speed of the preceding metal piece whose tip is already rolled by the finishing mill. (Invention 7)
  • the present invention provides the joining apparatus, wherein the following metal piece and the preceding metal piece are separated such that a predetermined space is opened between the leading end of the following metal piece and the tail end of the preceding metal piece.
  • a joining apparatus that performs clamping by clamping and heating the front end portion and the rear end portion in this state and then pressing the front end portion and the tail end portion, displacement caused by the pressing is performed. This is to determine whether or not the joining has been performed normally based on the amount. (Invention 8)
  • the present invention determines whether or not the subsequent metal piece can be finish-rolled continuously with the metal piece before, during and after the bonding, and determines that the subsequent metal piece is impossible. Then, a post-processing device for processing a joint portion between the joining device and the finish rolling mill, As a state when the joint is not processed, when the joining is stopped, the leading end of the succeeding metal piece is passed, and when the joining is incomplete, the joint is passed.
  • the joining portion is sandwiched on the exit side of the joining device by a rotary blade rotating in a direction opposite to a conveying direction of the following metal piece arranged above and below a pass line, In the case where a deburring device for removing burrs generated at the joint is installed, if the determination result is abnormal, the deburring by the deburring device is stopped. (The present invention 10) On the other hand, the following metal piece, which has a finished plate thickness changed and inserted into a finishing mill, and a subsequent metal piece following the following metal piece, As long as the abnormalities do not recur, endless rolling can be performed by joining the tail end and the tip end, but there are conditions.
  • the leading end of the subsequent metal piece may be rolled with a thickness greater than a predetermined finish thickness over its entire length in some cases. If the piece and the subsequent metal piece are to be continuously rolled, an unexpected change in the strip thickness in the vicinity of the joint between the succeeding metal piece and the subsequent metal piece is performed, or It is necessary to change the thickness during running, which has a larger thickness change amount than before. Here, if the thickness change amount of the change in the running thickness is too large, the shape control at the time of rolling cannot be coped with and the rolling of the running thickness changing portion becomes very difficult.
  • the present invention relates to a hot rolling method of a metal piece by a hot rolling facility capable of changing a running strip thickness to change a finished plate thickness during finish rolling, wherein the hot rolling facility comprises a finishing plate during finish rolling.
  • the planned thickness of the subsequent metal piece is a thickness that can be batch-rolled, or, as described above, from the subsequent metal piece to the final material to be joined, within the range where the strip thickness can be changed as described above. Even if the thickness was changed to the expected value and joined, it would not be possible to finish any one to the expected thickness. In such a case, the joining of the leading end of the subsequent metal piece may be stopped. The same applies to the subsequent material of the succeeding metal piece. (Invention 1 2) Brief description of the drawings
  • FIG. 1 is a front view showing an example of a continuous hot rolling line suitable for applying the present invention.
  • FIG. 2 is a front view showing a modification of the continuous hot rolling line.
  • FIG. 4 Front view showing the state of material transport in the finishing mill group
  • Figure 5 Cross-sectional view showing a joint where a joint failure has occurred
  • Fig. 11 Diagram showing an example of the ability to control the thickness change when changing the thickness between runs
  • FIG. 1 2 Front view showing the joining device in the state where joining rolling is performed normally
  • Fig. 13 Front view showing the normal state of the joining device when transporting past the tip of the following metal piece when joining is stopped
  • Fig. 14 Front view showing the condition when the stop position of the welding device is not appropriate and the sheet passes through the leading end of the following metal piece.
  • Fig. 16 Front view showing the post-processing device with the leading end of the following metal piece passed when welding is stopped
  • FIG. 17 Front view, partially including a block diagram, showing the overall configuration of the embodiment of the present invention.
  • Fig. 19 Front view showing the state when the stop position of the welding device is not appropriate and the sheet is conveyed past the tip of the following metal piece
  • FIG. 21 Similarly, front view showing a state of being transferred Fig. 22 Front view showing post-processing device in cutting preparation state
  • Figure 23 Flow chart showing the procedure for determining incomplete joining in the embodiment of the present invention
  • Fig. 31 Flow chart showing the procedure for recalculating and resetting the calculation of the succeeding metal piece after finishing the joint
  • FIG. 1 shows a continuous hot rolling equipment row (including a joining equipment row) of metal pieces suitable for application of the present invention.
  • the heating furnace 20, the mill group 22, the crop mill 24, the finishing mill group 26, and the winding device 28 are arranged in this order. Same as equipment.
  • the rolling mill group 22 and the finishing rolling mill group 26 as a facility for joining metal pieces, there is a joining cropper 30, a mobile joining device 40, and a deburring machine.
  • a post-processing device 50 such as a device is disposed, and a cutting device 60 such as a strip shear is disposed on the entry side of the winding device 28.
  • FIG. 3 shows an enlarged view of only the intermediate equipment between the mil mill group 22 and the finishing mill group 26.
  • 10 is the leading metal piece
  • 10 B is its tail end
  • 12 is the following metal piece
  • 12 A is its tip
  • 74 is the centering guide of the joining cropshaper
  • Reference numeral 34 denotes a metal piece detecting device
  • 62 a joining device equipped with a table roller 66 that is moved up and down by an elevating cylinder 64
  • the welding device 40 includes an inductor 43, which is a heater for welding, fixed to the center of a carriage 42 running in the direction of transporting the metal pieces by wheels 41 engaging with rails (not shown).
  • the tail end 10 B of the preceding metal piece is fixed by the output side clamp 44 B, and the tip 12 A of the succeeding metal piece is fixed to the tail end 10 B by the input side clamp 44 A.
  • the tip 12 A and the tail end 10 B are heated by the inductor 43, and then the tip 12 A and the tail end 10 B are heated. It is joined by pressing.
  • the joining device 40 also travels in the traveling direction of the metal piece in the traveling zone shown in FIG. 8 at the same speed in accordance with the transport of the metal piece.
  • the post-processing device 50 includes, as illustrated in FIG. 15 described later, an upper rotary blade 52 that is lowered by a pressing device 51, a lower rotary blade 54 that is raised by a pressing device 53, An openable apron 55 and upper and lower chip collecting devices 56 and 57 are provided to grind the joint 14 as shown in FIG.
  • the joining device 40 is in the maintenance position shown in Fig. 8 below, and the entrance and exit clamps 44A and 44B, the inductor 43 and the entry and exit side.
  • the table holding guides 45A and 45B are at the raised position, and pass through the tip. After passing through, the joining device 40 lowers the inlet / outlet table holding guides 45A and 45B to start.
  • the meandering caused by the bending of the sheet bar at the time of rough rolling causes the width edge to rub against the centering guide 74 on the entry side of the joining crop shear 30 and receive resistance. It is assumed that the transport has been delayed. Then, only the transport of the preceding metal piece 10 is continued, so the tip 12 A of the following metal piece 12 cannot catch up with the tail end 10 B of the preceding metal piece, and the welding device 40 starts the welding operation. does not enter. Therefore, when joining cannot be performed due to some abnormality as described above, joining is stopped according to the present invention.
  • the rolling schedule to the first one (ie, the head of the next endless rolling) of the continuous joining number, or roll the patch rolling material for batch rolling. Change to rolling.
  • the width edge of the leading metal piece 12 A rubs against the centering guide 74 on the entry side of the joining cup shear, and the conveyance seems to be delayed, the degree of opening of the centering guide 74 should be increased. Control and manual intervention.
  • the subsequent metal piece 12 after the welding is stopped can be finish-rolled to the expected thickness, the finish-rolling is performed to the expected thickness.
  • the specific method of setting the rolling conditions and operating conditions for endless rolling and patch rolling is, for example, the method disclosed in Japanese Patent Application Laid-Open No. 11-169926 filed by the present applicant. You may. That is, in Japanese Patent Application Laid-Open No. 11-169926, for a rolling target material to be subjected to endless rolling, for example, a slab, both the rolling conditions for endless rolling and the rolling conditions for patch rolling are determined in advance by, for example, a host computer. A method of keeping this is disclosed. When the endless rolling cannot be performed, the lower-level computer, for example, calculates the setting conditions for patch rolling of each facility based on the determined rolling conditions for patch rolling.
  • the joined portion is cut off according to the present invention prior to finish rolling.
  • the subsequent metal piece 12 after the joint cut is rolled by changing to the first rolling schedule of endless rolling or by changing to the rolling schedule of the batch rolled material.
  • the sheet metal is rolled to the expected sheet thickness.
  • the endless rolling is possible, but the batch rolling is not possible, for example, when the scheduled rolling schedule of the subsequent metal piece 12 after the welding is stopped or after the joint is cut is less than 1.2 mm in the finished plate thickness.
  • batch rolling cannot be performed on the scheduled rolling schedule. It usually takes ten and several seconds, and in some cases several tens of seconds, to finish the rolling of the preceding metal piece and set up the finishing mill again in preparation for the rolling of the subsequent metal piece. This is because the temperature of the row metal drops and it becomes too hard to roll at the expected thickness.
  • the planned thickness of the subsequent second metal piece is 2.0 mm
  • the change in the thickness of the first and second metal pieces is only 0.3 mm.
  • the planned thickness of the second plate is 1.2 mm
  • the amount of change in the plate thickness from the first to the second plate is as large as 1.1 mm. It is impossible to change the thickness of the rolling mill due to the controllability of the change in thickness during running, so the second planned thickness is changed to, for example, 1.6 mm and then joined and rolled. (Assuming a change in thickness of 0.7 mm from 2.3 mm to 1.6 mm can be accommodated) or the force to roll as a 1.2 mm batch roll without changing the thickness , You can choose either.
  • the planned finish sheet thickness can be achieved within the range of the running hot strip thickness change control capability of continuous hot finish rolling, joining and rolling are impossible. If there is, it is rolled as a batch rolled material.
  • the ability of the thickness change control during running is based on the speed of the response of the speed control system and the tension control system to the rate of change in the thickness X rolling speed (volume speed) (the plate breaks due to a sudden increase in tension. To prevent the plate from dubbing due to the decrease in tension or tension), and the ability to control the shape. Is decided.
  • the equipment related to the welding (the welding device 40 and the post-processing device 50) is operated to the first endless rolling or a mouth-up state in which the tip of the batch rolled material can pass. After the operation is completed, the tip of the following metal piece after the welding is stopped should pass through each facility.
  • the joining device 40 When the joining device 40 is stopped, it may be stopped by automatic position control (APC) at a position where the relative positional relationship with the elevating table roller 66 is appropriate, or the following metal piece 12 may be stopped. While stopping immediately, the side of the joining device 40 runs with the preceding metal piece 10 to some extent in synchronization with the speed, and then decelerates when the relative relationship is a little before the appropriate position, and the proper position You can stop by. Further, the side of the joining device 40 may be temporarily stopped in synchronization with the speed of the succeeding metal piece 12, and then may be shifted and stopped so that the relative relationship becomes an appropriate position.
  • APC automatic position control
  • the side of the joining apparatus 40 is stopped in synchronization with the speed of the subsequent metal piece 12 and at the same time.
  • the following metal piece 12 is temporarily stopped, and after completing the operation for creating the threading condition of the joining device 40 and the post-processing device 50 described later, the following metal piece 12 is Considering the time required to resume conveyance and finish rolling, it is assumed that the subsequent metal piece 1 2 will not be too hard due to temperature drop and cannot be rolled. After 0 moves to the downstream side of the elevating table zone, the passing condition creation operation of the succeeding metal piece 1 2 and the subsequent metal piece is performed.
  • the welding device is stopped at an appropriate position in the relative relationship, and the lifting motion of the table holding guides 45A and 45B is completed. After that, the following metal piece is decelerated to a transport speed that allows the leading end of the following metal piece to be introduced into the joining device.
  • the traveling of the joining device 40 is temporarily stopped, and the transport of the subsequent metal piece 12 is stopped and decelerated.
  • the post-processing device 50 opens the pressing device 51 and the pressing device 53, and closes the openable apron 55.
  • the rotary blades 52 and 54 are rotated in the same normal rotation direction as the metal piece conveying direction at a speed substantially equal to the metal piece conveying speed. This makes it possible for the metal piece to pass through smoothly.
  • An example of the logic for automatically determining whether or not to stop joining in the control device 88 is as follows. For example, the tail end 10 B of the preceding metal piece passes through the joining crop shear 30 and exits from the joining crop shear. Even if the metal piece detection device 34 on the side is turned off, the leading metal piece 12 A of the succeeding metal piece will not be turned on. It is determined that the catch-up transport of the tip 1 A is delayed for some reason, and it is determined that joining is stopped.
  • the judgment of stopping welding is based on whether or not the welding itself can be carried out, as in the judgments in 1 and 2, as well as the equipment related to endless rolling (joining equipment, post-processing equipment, strip shear, etc.). It is also possible to detect any abnormalities such as failure of each facility where endless rolling cannot be carried out without it, and use it as a criterion for stopping welding.
  • the pressing may be performed before the pressing of the tail end 10B and the tip end 12A starts.
  • the hot rolling facility to which the present invention can be applied is not limited to this.
  • the present invention is not limited thereto, and the present invention can also be applied to a hot rolling facility having a joining device that joins the tail end 10B and the tip end 12A, for example, by laser welding or the like.
  • the joining apparatus using the laser welding after the tail end 10B and the tip end 12A are abutted, the metal piece joint is heated by the laser. Therefore, the determination as to whether or not to stop the joining may be made before starting the heating by the laser beam.
  • the next problem is that even if the incomplete joints with insufficient strength are broken during the time between the occurrence of the incomplete joints and the resection, even if the incomplete joints are broken, no matter how hard they are Is to be transported without causing the problem.
  • the reason for such a gap is that the relative relationship between the traveling stop position of the joining device 40 and the elevating position of the elevating table roller is inappropriate. That is, as shown in FIG. 13, the span Q between the roller 46 on the joining device 40 and the elevating table roller 66 immediately upstream and downstream of the joining device 40 is set at an appropriate position. Is stopped, the span Q can be made approximately equal to the pitch P of the elevating table roller 66. However, if this positional relationship is not appropriate, as shown in Fig. 19, if there is an elevating table roller 66A that does not rise to the ascent limit, a span Q longer than the pitch P of the elevating table roller will be created there. I will. It is desirable to stop the joining device 40 so that the span Q is in the range of 0.Q ⁇ 1.5P.
  • the traveling trolley 42 stops at the joining device stop position where there is no need to create a table gap, and the operation of raising the table holding guides 45 A and 45 B is sufficiently fast, and the tip of the following metal piece 1 2 If the table gap can be closed before A comes to that position, as shown in Fig. 20, the tape closest to the downstream side, when viewed from the position of the bonding equipment at the time of the incomplete bonding, The joining device 40 stops at a position where it is not necessary to generate a gap exceeding 1.5 P, and at least the table holding guide 45 B on the downstream side (the exit side for the joining device 40). To rise.
  • the joining device 40 is The vehicle travels in synchronization with the speed of the imperfectly joined part, travels to the downstream end of the traveling zone, and stops. At this time, as shown in FIG. Raise the table holding guide 45B of the joining device 40 (the exit side for the joining device 40), and the rollers 46 on the joining device 40 and the most upstream roller 66B of the exit side zone of the joining device traveling zone. Set the span Q so that it is within the range of 0.5 ⁇ Q ⁇ 1.5 ⁇ for the pitch P of one table roller.
  • the leading metal piece 10 and the following metal piece 12 are not stopped at that time, and are transported as they are at the transport speed of the preceding metal piece whose tip is already rolled by the finishing mill group 26.
  • the post-processing device 50 is a debris removing device for removing burrs generated at the joint
  • the pari at the joint between the preceding metal piece and the following metal piece that have been incompletely joined is shown in FIG.
  • a tensile force acts in the direction of separating the joint from the rotary blade 54 toward the metal piece joint 11 so that the joint 11 is removed.
  • the rotary blades 52 and 54 are moved to the cutting standby position. Or, if possible, completely open the rotary blades 52, 54 as shown in Fig. 16 and close the openable apron 55.
  • FIG. 17 shows the overall configuration of the present embodiment.
  • 48 is a displacement meter for detecting the displacement of the metal piece when pressing the leading end of the preceding metal piece and the tip of the succeeding metal piece
  • 80 is the state of the joint 11 after joining.
  • a television camera for constantly taking pictures during operation; and a monitor for displaying an image of the joint portion after joining taken by the television camera as an image and displaying it for an operator.
  • Reference numeral 4 denotes a joint cutting push button for cutting the joint at the discretion of the operator 86, 88 denotes a control device, and 90 denotes a host computer.
  • Two television cameras 80 are provided, one at each of the two positions on the exit side of the joining device 40 and the entrance side of the crop shear 24, and are appropriately switched according to the transfer position of the joining point 11. used.
  • Scales are written on the screen of the monitor 82 so that when cutting the joint 11, the distance from the cutting position to the joint 11 can be determined.
  • the control device 88 includes a joining device 40, a post-processing device 50, a crop shear 24, and a push button 84 for cutting a joined portion.Although not shown, all devices to be controlled are connected. These devices are controlled by the control device 88.
  • the determination of incomplete joining in this embodiment is based on (1) a mouthpiece in the control device 88 (step 130), and (2) a pushbutton input by the operator (step 120). )
  • the control system is constructed so that both can make the judgment.
  • Step 130 If it is determined that the joint is incomplete, a treatment for cutting the joint 11 is performed (step 150).
  • the subsequent metal piece following the subsequent metal piece may be joined and subjected to endless rolling, or may be changed to batch rolling and rolled.
  • the joining device 40 and the post-processing device 50 need to be in a state where the tip of the subsequent metal piece can pass.
  • a method for allowing the leading end of the succeeding metal piece to pass through will be described.
  • the joining device 40 and the post-processing device 50 Is operated so that the following piece of metal can pass.
  • the joining device 40 moves to the maintenance position shown in FIG. 8, and then moves up the table holding guide 45 A 45 B as shown in FIG.
  • the clamps 4 4 A 4 4 B and the inductor 4 3 are moved up (open) together.
  • the device group is designed so that the relative relationship between the traveling stop position of the joining device 40 and the position of the lifting table 66 is in an appropriate state as shown in FIG. In this state, the preparation for transporting the subsequent metal piece is completed.
  • the lifting device 53 is opened, and the openable apron 55 is moved to a closed state as shown in FIG.
  • the rotation speed which was opposite to the transport direction in the cutting preparation state is changed to the same forward direction as the material transport, and the peripheral speed almost equal to the material transport speed (rotary blade diameter 9 5
  • the conveying speed of the subsequent metal piece to the finish rolling mill is set to 15 Ompm.
  • the post-processing device 50 when the post-processing device 50 has already been operated up to the state of FIG. 16 when the joint is passed through the post-processing device 50, the post-processing device 50 is left as it is. You should leave it.
  • the succeeding metal piece may be passed at the timing when the joining apparatus group has completed the transition to the state where the leading end of the subsequent metal piece can pass.
  • the joining equipment group is The transfer of the succeeding metal piece may be restarted at the timing when the transition to the passable state is completed, or the transfer may be restarted slightly earlier at the timing when it is expected to be able to pass by the passage.
  • the subsequent metal pieces may be stopped and stopped, or only the portion in contact with the roller may be moved back and forth so that the temperature does not locally decrease, or the oscillation may be on standby. Good.
  • the traveling of the joining device 40 and the transport of the following metal piece 12 are temporarily stopped in synchronization with the speed.
  • the stop position of tip 12A is 1.5m, with the start position in the traveling zone of welding device 40 as Om (reference) as shown in Fig. 8. It is assumed that the position is -After the stop is completed, the tail end 10B of the preceding metal piece is in the elevating table zone (in Fig. 8, the lowermost elevating table near the stroke end position when the welding device is running is the lower limit of the elevating table zone).
  • the table holding guides 45A and 45B are raised, and the clamps 44A and 44B and the inductor 43 are raised (open). .
  • the joining device 40 was stopped. Specifically, according to the procedure shown in Fig. 24, the stop position of the joining device 40 and the position of the elevating table where the relative relation between the stop position and the elevating table position is appropriate are set to the traveling position 6.15m, which is the maintenance position.
  • the joining device 40 was shifted and stopped (step 250), the table holding guides 45A and 45B were raised (step 300), and the preparation for transporting the subsequent metal piece 12 was completed.
  • the joining device 40 since the stop position of the tip 12A of the following metal piece after stopping the joining was 1.5 m (step 240), the joining device 40 was moved to the traveling position of 6.15 m. Force to shift to maintenance position (Step 250) If the stop position is more than 6.15m and 13.5 Om or less (Step 260), shift to the intermediate position of travel position 13.50m (Step 270), If the stop position is 13. If it is more than 50m and less than 20.00m (Step 280),
  • the control logic is configured to shift to the stroke end position of 00 m (Step 290). Theoretically, for each pitch of one table roller, there is a joining position stop position in which the relative relationship between the lifting table position is appropriate as the stop position of the joining device 40, but in this embodiment, after the joining is stopped,
  • the control logic is simplified by setting the transition destination of the welding device 40 to the nearest position downstream of the stop position of the tip 12 A of the succeeding metal piece among the three positions of the maintenance position, the intermediate position, and the stroke end position. Is being planned.
  • the post-processing device 50 opens the lifting device 51 and the lifting device 53 as shown in FIG. 16 (step 320) according to the procedure shown in FIG.
  • Step 330 the rotation of the rotary blades 52 and 54 is rotated in the forward direction, at a speed approximately equal to the material transfer speed 18 Ompm (rotary blade diameter 950 mm, rotation speed 6 Or rpm) (Steps 340, 350). Also, the upper and lower chip collecting devices 56 and 57 are returned to the standby position (step 360). After the joining is stopped, the subsequent metal strip transport speed from the restart of transport to the finishing mill setting is set to 15 Ompm.
  • the process waits for the completion of the preparation operation of the leading end of the succeeding metal strip and the completion of the finish rolling of the preceding metal strip 10.
  • step 440 After finishing the finish rolling of the preceding metal strip 10, press the button according to the procedure shown in Fig. 26 to recalculate (step 440) and reset (step 450) for the rolling of the succeeding metal strip by the operator's judgment. It is carried out in.
  • step 460 By pressing the stop release button at the discretion of the operator (step 460), the transport of the succeeding metal piece and the subsequent metal piece is restarted (step 470).
  • the present invention has been applied to hot rolling of metal pieces. It is apparent that the object of application of the present invention is not limited to this, and that the present invention can be similarly applied to general hot rolling of metal slabs.
  • Figure 29 shows examples of the rolling schedule before and after the second welding stop.
  • Fig. 30 shows the target sheet thickness of the hot-rolled material.
  • the second rope which is the trailing rope piece after the welding was stopped, was finish-rolled to the initial thickness of 4.0 mm, and the third and fourth rods were joined thereafter. It was continuously rolled.
  • the traveling of the welding device 40 is stopped after traveling to the downstreammost position of the traveling zone in synchronization with the transport speed of the preceding metal piece 10 and the following metal piece 12.
  • a command is issued from the control device 88 to the post-processing device 50 so as to stop the removal of the defective joint (burr).
  • the post-processing device 50 does not perform cutting in the cutting preparation state (the state of FIG. 22).
  • the cutter is automatically cut once with the crop shear 24 on the finishing mill side at a position 500 mm closer to the finishing mill side (one side of the preceding metal) than the joint 11, and after cutting, the subsequent The transport of the metal pieces 12 is stopped.
  • operator 86 is From the image of 2, it is visually confirmed how many meters behind the first cut end the joint 11 is. As a result, if it is confirmed that the joint 11 is located 60 O mm behind the first cut end, the operator judges that the crop should be cut twice with the cropper 24 again. I do.
  • the actual cut position is 600 mm closer to the finish rolling mill than the joint 11, with respect to the position 500 mm closer to the finish rolling mill than the joint 11, which is the first cut target position.
  • the position of 0 mm is due to the tracking error of the joint 11. In this case, the tracking error is on the side opposite to the finishing mill group 26 with respect to the joint position.
  • the joining device 40 After moving to the indicated maintenance position, as shown in Fig. 13, the table holding guides 45A and 45B are raised, and the clamps 44A and 44B and the inductor 43 are raised (open) together to operate in a state where they are raised. I made it. In this state, it is designed so that the relative relationship between the traveling stop position of the joining device 40 and the position of the elevating table roller 66 is proper as shown in FIG. In this state, the leading end of the succeeding metal piece following the succeeding metal piece is ready to be transported.
  • the upper and lower rotary blades 52 and 54 are moved by the pressing device 51 and the pressing device 53 as shown in FIG. 16 according to the procedure shown in FIG. Open
  • the third metal piece which is the subsequent metal piece after cutting the joint, is rolled at a planned thickness of 1.Omm and 2.6 mm, and the side guide at the tip is hooked.
  • Figure 33 shows the planned rolling schedule before cutting the third joint and the rolling schedule after cutting the joint.
  • Fig. 34 shows the estimated finished sheet thickness of the first to fourth sheets and the finished sheet thickness (actual results) of the first to fourth sheets when the joint between the second and third sheets is cut.
  • the rolling schedule before and after cutting the second joint is shown in Figure 35.
  • the target thickness of the hot-rolled material is shown in Fig. 36.
  • Example 4 the second strip, which was the trailing rope piece after the joining abnormality, was finish-rolled with the initially set thickness of 4.0 mm, and thereafter the third and fourth strips were joined and continuously rolled.
  • the present invention has been applied to hot rolling of metal slabs, but the application of the present invention is not limited to this, and the present invention can be similarly applied to general cold rolling of metal slabs. Is clear.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé de laminage à chaud. Même en cas d'anomalie avant, pendant ou après l'assemblage des pièces métalliques, il n'est pas nécessaire d'interrompre la ligne de production. Lorsqu'à l'entrée d'un laminoir de finition (26), l'extrémité avant d'une pièce métallique suivante doit être assemblée avec l'extrémité arrière (10B) d'une pièce métallique précédente aux fins de laminage continu avec cette pièce (10), on décide s'il est possible de conduire une opération de laminage sans fin avant et après l'assemblage. Si cette opération est impossible, l'assemblage est suspendu et la pièce métallique suivante (12) est stoppée. Ainsi, après le passage de l'extrémité arrière (10B) de la pièce métallique précédente dans le laminoir de finition (26), la pièce métallique suivante (12) est retransférée et soumise au laminage de finition avec un réglage de laminage discontinu, et si une anomalie survient dans la partie assemblée après l'assemblage, la partie assemblée (11) est coupée, entre la machine d'assemblage et le laminoir de finition (26), et le matériel à laminer est introduit dans le laminoir de finition avec un réglage de laminage discontinu.
PCT/JP1999/005043 1998-03-19 1999-09-16 Procede de laminage a chaud de pieces metalliques WO2001019543A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP07163098A JP3478119B2 (ja) 1998-03-20 1998-03-20 金属帯の熱間圧延方法
US09/807,903 US6449996B1 (en) 1998-03-19 1999-09-16 Method of hot-rolling metal pieces
CA002351605A CA2351605C (fr) 1999-09-16 1999-09-16 Procede de laminage a chaud de pieces metalliques
PCT/JP1999/005043 WO2001019543A1 (fr) 1998-03-20 1999-09-16 Procede de laminage a chaud de pieces metalliques
AU56520/99A AU765739B2 (en) 1999-09-16 1999-09-16 Method of hot-rolling metal pieces
KR10-2001-7005968A KR100515177B1 (ko) 1999-09-16 1999-09-16 금속편의 열간 압연 방법
EP99943361A EP1132154A4 (fr) 1999-09-16 1999-09-16 Procede de laminage a chaud de pieces metalliques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP07163098A JP3478119B2 (ja) 1998-03-20 1998-03-20 金属帯の熱間圧延方法
PCT/JP1999/005043 WO2001019543A1 (fr) 1998-03-20 1999-09-16 Procede de laminage a chaud de pieces metalliques

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WO2001019543A1 true WO2001019543A1 (fr) 2001-03-22

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PCT/JP1999/005043 WO2001019543A1 (fr) 1998-03-19 1999-09-16 Procede de laminage a chaud de pieces metalliques

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EP (1) EP1132154A4 (fr)
KR (1) KR100515177B1 (fr)
AU (1) AU765739B2 (fr)
CA (1) CA2351605C (fr)
WO (1) WO2001019543A1 (fr)

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CN113042909A (zh) * 2021-04-14 2021-06-29 江苏联宸激光科技有限公司 一种用于钢板激光切割装置的送料机构及时使用方法
CN113634605A (zh) * 2021-08-25 2021-11-12 重庆钢铁股份有限公司 基于视觉识别的中厚板待轧钢板自动分钢控制系统及方法

Families Citing this family (1)

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KR100946044B1 (ko) * 2007-12-03 2010-03-09 주식회사 포스코 후판의 제조를 위한 압연시스템 및 이를 이용한 압연방법

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EP0661112A1 (fr) * 1993-06-15 1995-07-05 Kawasaki Steel Corporation Procede pour laminer a chaud en continu des pieces metalliques, appareil et organes a cet effet
EP0738548A1 (fr) * 1995-04-18 1996-10-23 Kawasaki Steel Corporation Procédé de laminage à chaud de soudure des pièces en acier pendant le laminage à chaud en continu
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JPH10272510A (ja) * 1997-03-31 1998-10-13 Kawasaki Steel Corp 熱間圧延におけるシートバー接合部の冷却方法及び装置

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EP0661112A1 (fr) * 1993-06-15 1995-07-05 Kawasaki Steel Corporation Procede pour laminer a chaud en continu des pieces metalliques, appareil et organes a cet effet
EP0738548A1 (fr) * 1995-04-18 1996-10-23 Kawasaki Steel Corporation Procédé de laminage à chaud de soudure des pièces en acier pendant le laminage à chaud en continu
JPH09103813A (ja) * 1995-10-11 1997-04-22 Kawasaki Steel Corp 連続熱間圧延方法
JPH10272510A (ja) * 1997-03-31 1998-10-13 Kawasaki Steel Corp 熱間圧延におけるシートバー接合部の冷却方法及び装置

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042909A (zh) * 2021-04-14 2021-06-29 江苏联宸激光科技有限公司 一种用于钢板激光切割装置的送料机构及时使用方法
CN113042909B (zh) * 2021-04-14 2023-02-07 江苏联宸激光科技有限公司 一种用于钢板激光切割装置的送料机构及时使用方法
CN113634605A (zh) * 2021-08-25 2021-11-12 重庆钢铁股份有限公司 基于视觉识别的中厚板待轧钢板自动分钢控制系统及方法
CN113634605B (zh) * 2021-08-25 2023-02-28 重庆钢铁股份有限公司 基于视觉识别的中厚板待轧钢板自动分钢控制系统及方法

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KR100515177B1 (ko) 2005-09-16
CA2351605A1 (fr) 2001-03-22
EP1132154A1 (fr) 2001-09-12
KR20010107959A (ko) 2001-12-07
AU765739B2 (en) 2003-09-25
EP1132154A4 (fr) 2005-06-15
AU5652099A (en) 2001-04-17
CA2351605C (fr) 2008-11-18

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