JP4778832B2 - Width and width adjustment method and apparatus for first and second metal plates and continuous rolling equipment - Google Patents

Description

  The present invention relates to a front and rear metal plate width aligning apparatus and method and a continuous rolling facility to which the width aligning method and apparatus are applied at the time of joining the tail end portion of the preceding metal plate and the front end portion of the subsequent metal plate. About.

  For example, in a continuous hot rolling facility, when a metal plate is roughly rolled by a roughing mill and wound around a coil box, and then unwound from this coil box and finish-rolled by a finishing mill, it is unwound from the coil box. The tail end portion of the preceding metal plate and the tip end portion of the succeeding metal plate are joined by a joining device and are continuously finish-rolled by a finish rolling mill to obtain a metal plate (rolled steel plate) having a desired thickness. It has become. Thus, in order to perform finish rolling continuously, it is necessary to join the preceding and succeeding metal plates at a high speed, and various techniques have been conventionally proposed.

  For example, in Patent Document 1, a steel piece joining apparatus comprising a cutting machine that cuts the rear end portion of the preceding material and the front end portion of the succeeding material, and a joining machine that heats and presses the rear end portion and the front end portion after cutting. Discloses a device and a method for centering a steel slab by arranging side guide devices for gripping and centering a steel slab from both sides on a cutting machine input / output side and a joining machine input / output side. Further, according to the present apparatus and method, it can be said that centering can be performed at the time of cutting, heating, and pressure welding, so that it is possible to reliably prevent a joining failure due to a butt failure such as a center shift or a mouth opening.

  Moreover, in patent document 2, in the apparatus which butt-joins and joins the rear-end part of a preceding rolling material, and the front-end | tip part of a succeeding rolling material, a preceding rolling material and a following rolling material are independently hold | maintained in a rolling equipment center (pass center). It is disclosed that a hydraulic side guide device is provided.

Japanese Patent No. 3377924 Japanese Patent No. 2947612

  By the way, in general, a partial bend may occur near the tail end of the preceding metal plate unwound from the coil box or near the tip end of the succeeding metal plate.

  However, as disclosed in Patent Document 1 and Patent Document 2 described above, when the side guide device has only a centering function, there is a bend near the tail end of the preceding metal plate or the tip end of the following metal plate. A width shift state occurs at the joint.

  For example, even if the joining method is an example in which joining is completed in a shearing process in which the end portions of the preceding and succeeding metal plates are overlapped, as shown in FIG. When there is a partial (local) bending near the tip of the trailing metal plate 100B (see FIG. 7A), the first to fourth vertical roller pairs 101a to 101d of the side guide device cause the leading metal plate 100A. When the joining is completed in the shearing process in which the end portions are overlapped at the joining position while centering the trailing metal plate 100B (see FIG. 7B → FIG. 7C), the joining portion Thus, a width deviation state (see width deviation portions a and b in FIG. 7C) occurs. This phenomenon is particularly remarkable when the partial bending directions are different as shown in FIG.

As shown in FIG. 8, in the guide plate pair 103 of the side guide device disposed on the entry side of the finish rolling mill 102, the first and second metal plates 100A, 100B widthwise shift unit Lee at junction passage, in order to avoid interference with the filtration, necessary to widen the distance L ₁ occurs, there is a problem that can not perform the function of straightening.

  In addition, the joining portion is restrained in the width direction every time the joining portion of the succeeding metal plates 100A and 100B passes through the guide plate pair 103 on the entry side of each rolling mill until the exit side of the finish rolling mill 102. Because there is no, you can not correct the bend. And this state is held until it is wound on the exit side of the finish rolling mill 102, and it is necessary to consider interference in the width direction with the guide plate pair 103, so that there is a problem that the operation becomes complicated. . In addition, the wound coil also has a problem in that a large step is left at the joint between the preceding and succeeding metal plates 100A and 100B, and a width deviation state remains.

  The present invention has been made in view of the above circumstances, and it is possible to reduce the width deviation at the joining position of the preceding and succeeding metal plates as much as possible and to correct the bending near the joint portion. An object is to provide a width aligning method and apparatus and continuous rolling equipment.

Previously according to the present invention for achieving the above object, justification method of the trailing metal plate, in joining the tip of the rear end portion and the trailing metal plate prior metal plate in progression of a pass line direction , the deviation in the width direction center position of each other at the joint position of the distal end portion of the rear end portion and the trailing metal plate prior metal plate such decreases, shifting at least one of the width direction of the preceding metal plate and the following metal plate It is characterized by that.

  Further, the amount of displacement in the width direction is detected by detecting the bent state of the rear end portion of the preceding metal plate or the front end portion of the subsequent metal plate, and the amount of displacement of the center position in the width direction at the joining position is obtained from this detection result. It is the amount of movement obtained in order to adjust so as to reduce the deviation of the center position in the width direction based on the deviation amount.

  Further, when shifting in the width direction, the full length portion of the preceding metal plate is bent near the rear end portion while advancing substantially the same position, or the full length portion of the succeeding metal plate is moved near the front end portion while moving the substantially same position. It is characterized by bending.

  The amount of bending is within the range of elastic deformation of the preceding metal plate or the following metal plate.

  In the joining, a method is used in which the joining is completed in a shearing process in which the end portions of the preceding and succeeding metal plates are overlapped.

  Further, when shifting in the width direction, a first vertical roller is disposed in front of the joining position, and a second vertical roller is disposed at the anti-joining position of the first vertical roller. Determines the width position of the full length portion, and the first vertical roller reduces the shift in the center position in the width direction of the joining position of the rear end portion of the preceding metal plate and the front end portion of the subsequent metal plate. It is characterized by shifting in the width direction with respect to the two vertical rollers.

In order to achieve the above object, a width aligning device for leading and trailing metal plates according to the present invention comprises:
A joining device for joining the rear end portion of the preceding metal plate and the front end portion of the succeeding metal plate under the progress in the pass line direction;
Prior to the joining, a bending detection device that detects the bending state of the rear end of the preceding metal plate or the front end of the subsequent metal plate, and
A side guide device to shift at least one width direction before Kisaki row metal plate and the trailing metal plate,
At the time of joining, based on the detection signal from the bend detection device, so that the shift in the center position in the width direction of the rear end portion of the preceding metal plate and the front end portion of the succeeding metal plate is reduced at the joining position, A control device for driving and controlling the side guide device;
It is provided with.

  In order to achieve the above object, a continuous rolling facility according to the present invention comprises a finishing mill and a downcoiler that are composed of a rough mill, a coil box, a joining device, and a multi-stand rolling mill sequentially from the upstream side in the pass line direction. In addition, a width aligning device for the first and subsequent metal plates is interposed between the coil box and the finishing mill.

  According to the present invention, when joining the preceding and succeeding metal plates, the leading and trailing metal plates are joined so as to reduce the shift in the center position in the width direction at the joining position of the trailing end portion of the preceding metal plate and the leading end portion of the succeeding metal plate. Since at least one of the metal plate and the succeeding metal plate is shifted in the width direction, the width deviation at the joining position of the preceding and succeeding metal plates can be reduced as much as possible.

  As described above, since the width deviation at the time of joining due to the bending existing at the rear end portion of the preceding metal plate or the front end portion of the succeeding metal plate is made as small as possible, the side guide device disposed on the finishing mill entry side It is possible to correct the bending, and finish rolling is possible while reducing the bending of the entire length including the joining position.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for width alignment of a preceding and subsequent metal plate and continuous rolling equipment according to the present invention will be described in detail with reference to the drawings.

  1 is a schematic side view of a continuous (hot) rolling facility showing an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view of a pair of vertical rollers, and FIG. 4 is a control block diagram. FIG. 5 is an explanatory view of the action at the time of joining, and FIG. 6 is an explanatory view of the action at the time of passing through the joint in the side guide device.

  As shown in FIGS. 1 and 2, the continuous (hot) rolling equipment of this embodiment is composed of a rough rolling mill (coarse mill) 1, a coil box 2, a joining device 3, and a multi-stand rolling mill from the upstream side. A finishing mill (finishing mill) 4 and a down coiler 5 are provided.

  The succeeding metal plate (following sheet bar) 6 roughly rolled by the rough mill 1 is wound around the coiler of the coil box 2, and the difference in travel speed between the rough mill 1 and the finishing mill 4 is adjusted. The leading end of the succeeding sheet bar 6 unwound from the coiler of the coil box 2 (the crop is cut by the crop shear 7 as necessary) is the preceding metal plate (leading sheet bar) by the stacking device 8 of the joining device 3. 9 is superimposed on the rear end portion (the crop is cut by the crop shear 7 as required).

  The leading end of the succeeding sheet bar 6 and the trailing end of the preceding sheet bar 9 are joined by the joining machine 10 of the joining device 3, and the crop at the joined portion is cut by the crop processing device 12. The sheet bar 11 joined by the joining device 3 and brought into a continuous state is sent to the finishing mill 4.

  The joining device 3 is configured to join the rear end portion of the preceding seat bar 9 and the front end portion of the succeeding seat bar 6 during traveling, and is a short-time joining device capable of joining in a short time. In order to perform joining during traveling, a configuration in which the joining machine 10 moves following the traveling of the seat bar or a configuration in which the joining machine 10 swings following the traveling of the seat bar is applicable. .

  For example, the joining machine 10 of the joining apparatus 3 in the present embodiment is a pair that joins while pressing and shearing the overlapping portion of the trailing end portion of the preceding sheet bar 9 and the leading end portion of the succeeding seat bar 6 from both sides. This is a joining mechanism having a shear blade.

  The sheet bar 11 sent to the finishing mill 4 is successively hot-rolled by a plurality of stand mills and finish-rolled to a desired plate thickness, and the sheet bar 11 exiting the finishing mill 4 is taken up by the down coiler 5. Here, a split shear (not shown) is installed in front of the down coiler 5, and the sheet bar 11 joined in front of the finishing mill 4 is wound by the down coiler 5 while being split by the split shear. ing.

  In the figure, reference numeral 15 denotes a crop shear provided on the entry side of the finishing mill 4, 16 denotes an edge heater disposed on the upstream side of the pass line of the crop shear 15, and 17 denotes proximity to the downstream side of the pass line of the edge heater 16. The bar heater 18 arranged in this manner is a descaler arranged close to the upstream side of the pass line of the bonding apparatus 3.

  The arrangement of the crop shear 15, the edge heater 16, the bar heater 17 and the descaler 18 is appropriately selected and arranged according to the state of the continuous (hot) rolling equipment, etc. It is not limited to the examples shown.

  In this embodiment, a first bending measuring device (a bending detection device) 20 for detecting a bending (state) at the leading end portion of the succeeding sheet bar 6 close to the downstream side of the pass line of the crop shear 7 and a preceding sheet bar. A second bend measuring instrument (bend detecting device) 21 for detecting a bend (state) at the rear end of 9 is arranged. The first bend measuring instrument 20 and the second bend measuring instrument 21 are, for example, CCD cameras, and their image signals are sent to a control device 30 described later. Needless to say, in detecting the bending at the leading end of the trailing sheet bar 6 and the trailing end of the preceding sheet bar 9, it is possible to use a single bending measuring instrument.

  Further, in the vicinity of the upstream side of the pass line of the first bending measuring instrument 20 (located in the upstream side of the pass line of the crop shear 7 in the illustrated example), first and second longitudinal roller pairs 22 as side guide devices, 23 are arranged at a predetermined interval. The first and second vertical roller pairs 22 and 23 are used for centering the succeeding sheet bar 6 in order to measure the bending at the leading end portion of the succeeding sheet bar 6 by the first bend measuring instrument 20.

  Further, the third and third side guide devices are located close to the downstream side of the pass line of the second bending measuring instrument 21, that is, on the upstream side of the pass line of the joining device 3 (with the descaler 18 in the illustrated example). The fourth vertical roller pair 24, 25 (the third vertical roller pair 24 corresponds to the second vertical roller of claim 6 and the fourth vertical roller pair 25 corresponds to the first vertical roller of claim 6). Arranged at a predetermined interval. The third and fourth vertical roller pairs 24 and 25 perform the centering of the preceding sheet bar 9 in order to measure the bending at the rear end portion of the preceding sheet bar 9 by the second bending measuring instrument 21, and perform the following at the time of joining. The sheet bar 6 can be moved so as to reduce the bending at the front end portion thereof.

  Further, the fifth and sixth vertical roller pairs 26 and 27 (fifth vertical roller pair 26) as side guide devices are positioned downstream of the joining device 3 (passing the crop processing device 12 in the illustrated example). Corresponds to the first vertical roller of claim 6, and the sixth vertical roller pair 27 corresponds to the second vertical roller of claim 6). The fifth and sixth vertical roller pairs 26 and 27 are movable so as to reduce bending at the rear end portion of the preceding sheet bar 9 at the time of joining.

  As shown in FIG. 3, the first to sixth vertical roller pairs 22 to 27 are arranged in a direction orthogonal to the pass line by a pair of left and right first to sixth vertical roller pairs 22a, 22b to 27a, 27b, that is, It can be moved in the width direction of the seat bar. The fourth and fifth vertical roller pair driving devices 25a, 25b, 26a, and 26b can operate independently on the left and right sides in the figure, and the other vertical roller pair driving devices 22a, 22b to 24a, 24b. 27a and 27b are movable in the closing direction or the opening direction in synchronization with the left and right ones in the figure. These vertical roller pair drive devices 22a, 22b to 24a, 24b, 27a, 27b are also independent of the left and right ones in the figure, as are the fourth and fifth vertical roller pair drive devices 25a, 25b, 26a, 26b. Needless to say, it may be configured to be operable.

  The pair of left and right first to sixth vertical rollers 22a, 22b to 27a, 27b are, for example, hydraulic cylinders, and their expansion and contraction operations are driven and controlled by a control device 30 described later.

  In FIG. 1 and FIG. 2, reference numeral 28 denotes a pair of guide plates as side guide devices disposed on the entry side of the finishing mill 4, and the guide plate pair drive devices 28a and 28b (see FIG. 4) are also described later. The drive is controlled by the device 30.

  As shown in FIG. 4, for example, an image signal is input to the control device 30 from the first and second bending measuring devices 20 and 21. Based on these input signals such as image signals, the left and right pair of first to sixth vertical roller pair driving devices 22a, 22b to 27a, 27b and the guide plate pair driving devices 28a, 28b are driven and controlled.

  Specifically, prior to joining, the first and second longitudinal roller pair driving devices 22a, 22b, 23a, and 23b are driven, and the leading end of the succeeding sheet bar 6 is driven by the first and second longitudinal roller pairs 22 and 23. With the part centered, the bending state of the trailing sheet bar 6 is detected and measured by the first bending measuring instrument 20. Further, the third and fourth vertical roller pair driving devices 24a, 24b, 25a, 25b are driven and the rear end portion of the preceding sheet bar 9 is centered by the third and fourth vertical roller pairs 24, 25. The bend (state) at the rear end portion of the preceding sheet bar 9 is detected and measured by the 2-bend measuring instrument 21. The measurement includes, for example, a method of measuring the both width end positions and obtaining the center position from the both width end positions.

That is, for example, image signals input from the first and second bending measuring devices 20 and 21 are subjected to image processing, and the bending (state) at the leading end portion of the succeeding sheet bar 6 and the bending at the trailing end portion of the preceding sheet bar 9 are performed. (State) is detected and measured. Then, deviation amounts δ _f and δ _p of the center position in the width direction at the joining position (see the alternate long and short dash line along the pass line direction) are calculated from the measurement result (see FIG. 5A).

Next, after calculating the movement amounts of the fourth and fifth vertical roller pairs 25 and 26 for adjusting the shift amounts δ _f and δ _{p of the} width direction center position to be small (third and sixth). The vertical roller pair 24, 27 is fixed at the centered position), and accordingly, the fourth and fifth vertical roller pair driving devices 25a, 25b, 26a, 26b are stroked in opposite directions (see arrows in FIG. 5B). Thus, the leading end of the succeeding sheet bar 6 and the trailing end of the preceding sheet bar 9 are shifted in the width direction. In this case, it goes without saying that only one of the fourth and fifth vertical roller pairs 25 and 26 may be moved to adjust the width direction center position deviations δ _f and δ _{p to} be small. Yes.

  Thereafter, the joining device 10 of the joining device 3 is joined while being pushed and sheared from both sides with the overlapping portion of the rear end portion of the preceding sheet bar 9 and the front end portion of the succeeding sheet bar 6 interposed therebetween. At this time, as shown in FIG. 5 (c), the joining is performed without a width shift portion (see (a) and (b) of FIG. 7 (c)).

Further, as shown in FIG. 6, the control device 30 controls the drive of the guide plate pair drive devices 28a and 28b, and appropriately controls the distance between the guide plate pair 28, for example, the control is performed to the distance L ₂ in FIG. By doing so, it is possible to suppress meandering of the joined sheet bar 11 and correct the bending. On the other hand, by controlling the distance L ₃ in FIG. 6B, the meandering of the joined sheet bars 11 can be suppressed. That is, L ₁ > L ₂ and L ₃ can be established between the interval L ₁ in FIG. 8 and the intervals L ₂ and L ₃ in FIG. As described above, this is possible because there is no width shift state at the joint.

In this way, in this embodiment, in the continuous (hot) rolling facility, the leading end portion of the succeeding sheet bar 6 and the trailing end portion of the preceding sheet bar 9 are pushed from both sides with the overlapping portion interposed therebetween and sheared. During joining, the bending (state) at the leading end of the succeeding seat bar 6 and the bending (state) at the trailing end of the preceding seat bar 9 are detected and measured, and the width direction at the joining position is detected from the measurement result. The shift amounts δ _f and δ _p of the center position are calculated, and the movement amounts of the fourth and fifth vertical roller pairs 25 and 26 for adjusting the shift amounts δ _f and δ _{p to} be reduced are calculated. Since the leading end portion of the succeeding seat bar 6 and the trailing end portion of the preceding seat bar 9 are shifted in the width direction in a reciprocal manner, the width shift at the joining position of the preceding and succeeding seat bars 9 and 6 is possible. Can be reduced.

  When the leading end of the succeeding seat bar 6 and the trailing end of the preceding seat bar 9 are shifted (bent) in the width direction, the shifting amount (bending amount) is within the range of elastic deformation of the seat bar. It is preferable. When the elastic deformation range is exceeded, permanent deformation remains in the width direction, and the position in the width direction between the fourth and fifth longitudinal roller pairs 25 and 26 and the joining position changes every moment, and a desired position is obtained at the joining position. It is difficult to secure the position in the width direction.

  As described above, since the width deviation at the time of joining due to the bending existing at the leading end portion of the succeeding seat bar 6 or the trailing end portion of the preceding seat bar 9 is made as small as possible, the bending is corrected by the guide plate pair 28. Thus, finish rolling is possible while reducing the bending of the entire length including the joining position. Even in the threading of the sheet bar 11 on the exit side of the finishing mill 4, there is no bending, which is good. In addition, even in the form of the coil that has been wound, there is an effect that there is no large step at the joint.

  Further, when the joint portion passes through the finishing mill 4, the center position in the width direction of the rear end portion of the preceding seat bar 9 and the front end portion of the succeeding seat bar 6 passes through the same position as the substantially full length portion (general portion). There is also an advantage that the rolling becomes stable.

  Further, if the shift of the center position can be reduced, the setting method is facilitated because there is no large step at the joint even when setting the side guide device on the entrance side of each rolling mill of the finishing mill 4.

  In addition, in the case of such a method of joining by joining, such a width aligning apparatus and method joins the cut state of the trailing end of the preceding sheet bar or the leading end of the succeeding sheet bar before joining with a cutting machine (crop shear). Sometimes it is necessary to reproduce, and like the present apparatus and method, it is difficult to move so as to reduce the amount of bending at the time of joining. In a joining method that does not directly use the leading end surface of the succeeding sheet bar or the trailing end surface of the preceding sheet bar, such as superimposing and joining, this adjustment can be realized with realistic equipment and is an effective means. In addition, when the joining method is a method in which the joining is completed in the shearing process, cutting by a cutting machine (crop shear) before joining may not be necessary in some cases. If it is not butt | matching, the above-mentioned bending can be decreased irrespective of the presence or absence of the cut with a cutting machine (crop shear).

It is a schematic structure side view of the continuous (hot) rolling equipment which shows one Example of this invention. It is also a plan view. It is a front view of a vertical roller pair similarly. It is also a control block diagram. It is an operation explanatory view similarly at the time of joining. It is an operation explanatory view at the time of joint part passage similarly in a plate-shaped side guide. It is action explanatory drawing at the time of joining which shows the conventional malfunction. It is operation | movement explanatory drawing at the time of the junction part passage in the plate-shaped side guide which shows the conventional malfunction.

Explanation of symbols

1 Coarse rolling mill (Coarse mill), 2 Coil box, 3 Joining device, 4 Finish rolling mill (Finish mill), 5 Downcoiler, 6 Subsequent metal plate (Subsequent sheet bar), 7 Crop shear, 8 Stacking device, 9 preceding metal plate (preceding sheet bar), 10 joining machine, 11 sheet bar, 12 crop processing device, 15 crop shear, 16 edge heater, 17 bar heater, 18 descaler, 20 first bending measuring instrument, 21 second bending measuring instrument , 22 1st vertical roller pair, 23 2nd vertical roller pair, 24 3rd vertical roller pair, 25 4th vertical roller pair, 26 5th vertical roller pair, 27 6th vertical roller pair, 22a, 22b-27a, 27b First to sixth longitudinal roller pair driving device, 28 guide plate pair, 28a, 28b Guide plate pair driving device, 30 control device.

Claims (8)

When joining the trailing edge of the preceding metal plate and the leading edge of the succeeding metal plate while proceeding in the pass line direction, the width of each other at the joining position of the trailing edge of the preceding metal plate and the leading edge of the trailing metal plate A width aligning method for the leading and trailing metal plates, wherein at least one of the leading metal plate and the trailing metal plate is shifted in the width direction so that the deviation of the direction center position is reduced .   The amount of displacement in the width direction is detected by detecting the bent state of the rear end portion of the preceding metal plate or the front end portion of the subsequent metal plate, and the amount of displacement of the center position in the width direction at the joining position is obtained from this detection result. 2. The method for aligning the width of the preceding and succeeding metal plates according to claim 1, wherein the amount of movement is obtained in order to adjust so as to reduce the deviation of the center position in the width direction.   When shifting in the width direction, the full length portion of the preceding metal plate is bent near the rear end while advancing substantially the same position, or the full length portion of the succeeding metal plate is bent near the front end while advancing substantially the same position. 3. The method for aligning the width of the front and rear metal plates according to claim 1 or 2.   4. The method according to claim 3, wherein the bending amount is within a range of elastic deformation of the preceding metal plate or the succeeding metal plate.   The tip according to claim 1, 2, 3, or 4, wherein a method of completing the joining in a shearing process in which the ends of the preceding and succeeding metal plates are overlapped is used for the joining. Width alignment method for the trailing metal plate.   In shifting in the width direction, a first vertical roller is disposed in front of the joining position, and a second vertical roller is disposed at the anti-joining position of the first vertical roller. The first vertical roller is configured to determine the width position of the joining position between the rear end portion of the preceding metal plate and the front end portion of the succeeding metal plate so as to reduce the shift in the center position in the width direction. 6. The method of aligning the width of the front and rear metal plates according to claim 1, wherein the width is shifted in the width direction with respect to the vertical roller. A joining device for joining the rear end portion of the preceding metal plate and the front end portion of the succeeding metal plate under the progress in the pass line direction;
Prior to the joining, a bending detection device that detects the bending state of the rear end of the preceding metal plate or the front end of the subsequent metal plate, and
A side guide device to shift at least one width direction before Kisaki row metal plate and the trailing metal plate,
At the time of joining, based on the detection signal from the bend detection device, so that the shift in the center position in the width direction of the rear end portion of the preceding metal plate and the front end portion of the succeeding metal plate is reduced at the joining position, A control device for driving and controlling the side guide device;
A width aligning device for leading and trailing metal plates.   A finishing mill and a down coiler, each of which includes a rough mill, a coil box, a joining device, and a plurality of rolling mills in order from the upstream side in the pass line direction, are provided between the coil box and the finishing mill. A continuous rolling facility characterized by interposing a width aligning device for the preceding and following metal plates.

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