JP2007313514A - Steel sheet transport control method - Google Patents

Abstract

The present invention provides a steel sheet conveyance control method capable of adjusting and optimizing the amount of a steel sheet conveyed on a shear line and stabilizing the entire shear line and production line.
Based on the congestion state of the steel plate I on the shear line 2, it is determined whether or not the steel plate I on the shear line 2 is to be transferred to the retreat position Q1 (Q2, Q3), and the transfer object determined to be transferred is determined. The steel plate I is transferred to the retreat position Q1 (Q2, Q3). Further, when the retreat position is divided into a plurality of Q1 to Q3 in advance and it is determined that the steel plate I on the shear line 2 is transferred to the retreat position Q1 (Q2, Q3), the conveyance direction X of the steel plate I to be transferred is X The position Q1 to Q3 to be transferred to the plurality of positions Q1 to Q3 is determined on the basis of the length of the steel sheet, and the steel plate I to be transferred is transferred to the determined positions Q1 (Q2 and Q3).
[Selection] Figure 4

Description

  The present invention relates to a steel plate conveyance control method on a shear line that is provided downstream of a rolling line, for example, to shear a steel plate conveyed from the rolling line to a desired dimension and produce a thick steel plate.

  Generally, when manufacturing a thick steel plate, the steel plate is rolled in a rolling line and then cooled, and then the steel plate is sheared to a predetermined product size by various shearing machines provided on the shearing line before shipment. Patent Document 1 discloses a steel sheet manufacturing technique in which a shear line is connected to a downstream of a rolling line via a cooling bed and rolling, cooling, and shearing processes are sequentially performed while the steel sheet is conveyed. In the shear line described in Patent Document 1, the steel sheet rolled in the rolling line is subjected to split shear, edge-cut shear, longitudinal shear, and finish shear in the shear line.

JP-A-9-290321

  However, there is a capacity difference between the processing capacity of the rolling line and the processing capacity of the shear line, and the amount of steel sheet that each line can process per unit time is not necessarily the same. For example, when rolling in a rolling line, depending on the steel sheet to be rolled, during the rolling process, the rolling is temporarily stopped and waited until a predetermined temperature is reached (referred to as “temperature waiting”) before the rolling is resumed. There is also a case. Therefore, the processing capacity of the rolling line varies greatly depending on various conditions such as whether or not to wait for this temperature. On the other hand, the processing capacity of the shear line varies greatly depending on various conditions such as the edge cutting shear processing capacity of the edge cutting shearing machine and the number of products that a single steel sheet rolled in the rolling line is sheared. To do.

  In the steel sheet conveyance control method described in Patent Document 1, the amount of the steel sheet conveyed from the rolling line and the cooling bed to the shear line cannot be adjusted. It is difficult to cope with the difference in processing capacity. For this reason, if the processing capacity of the rolling line exceeds the processing capacity of the shear line, the amount of steel sheet transported from the rolling line to the shearing line becomes excessive, the shearing line becomes clogged, and processing in the rolling line is stopped. It will fall into an unavoidable situation. When the rolling line is thus frequently stopped, productivity is lowered.

  The present invention has been made in view of the above problems, and is caused by a difference in processing capacity between other steel plate processing lines such as a rolling line and processing capacity of a shear line, or between shearing machines in a shear line. Due to the difference in capacity, the amount of steel sheet transported on the shear line becomes excessive, and the processing of the rolling line must be stopped. An object of the present invention is to provide a steel sheet conveyance control method that can stabilize and improve the productivity of the entire production line for thick steel sheets.

In order to solve the above-described problems, according to the present invention, a part of a steel plate that is rolled on a rolling line and cooled to a predetermined temperature and then conveyed on a shearing line that shears to a desired dimension is transferred to the shearing line. A method of transferring to a retreat position provided outside,
Based on the congestion state of the steel plates on the shear line, it is determined whether or not the steel plates on the shear line are transferred to the retreat position, and the steel plates to be transferred that are determined to be transferred are transferred to the retreat position. A steel sheet conveyance control method is provided.

  In the steel sheet transport control method, when the retreat position is divided into a plurality of parts in advance and it is determined that the steel sheet on the shear line is transferred to the retreat position, the length in the transport direction of the steel sheet to be transferred is determined. Based on this, it may be determined which of the plurality of positions is transferred, and the steel plate to be transferred may be transferred to the determined position.

  In the steel sheet conveyance control method, when the steel plate to be transferred is transferred to the retreat position, the steel plate to be transferred on the shear line has a center in the conveyance direction as a center in the conveyance direction of the retraction position. You may make it convey to the matching transfer position.

  In the steel sheet conveyance control method, when the steel plate to be transferred is transferred to the retracted position, the steel plate to be transferred is attracted and held by a magnet and transferred. The length of the portion that is not attracted and held by the magnet may be substantially equal.

  In the steel sheet transport control method, based on the congestion state of the steel sheet on the shear line, it is determined whether or not the steel sheet transferred to the retreat position is returned to the shear line. Based on the length of the empty space generated on the line in the transport direction, it is determined which of the steel plates transferred to the retreat position is to be returned to the empty space, and the determined steel plate to be returned is transferred onto the shear line. You may make it do.

  In the steel sheet transport control method, when returning the steel plate to be returned onto the shear line, the steel plate to be transported is attracted and held by a magnet, and the steel plate to be transported is in a direction perpendicular to the transport direction. The lengths of the portions that are not attracted and held by the magnets at both ends may be substantially equal.

  According to the present invention, the state of conveyance can be optimized by transferring the steel sheet conveyed on the shear line from the shear line to the outside of the shear line and adjusting the amount thereof, thereby stabilizing the operation of the shear line. It is possible to make it. Furthermore, it is also possible to adjust the amount of the steel sheet conveyed on the shear line by returning the steel sheet transferred to the outside of the shear line to the shear line. Thus, by adjusting by transferring or returning the steel plate, it is possible to improve the productivity of the entire production line of the thick steel plate including the shear line. In general, because the lengths of steel plates transported on the shear line (length in the transport direction) are diverse, these steel plates that are not uniform in length are appropriately and efficiently removed from the shear line. It can be transferred. Furthermore, by returning a steel plate of an appropriate length from the outside of the shear line according to the size of the empty space generated on the shear line, the productivity of the entire thick steel plate production line can be further improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a configuration diagram showing a part of a configuration of a thick steel plate production line 1 to which a control device 32 suitable for carrying out the present invention is applied. As shown in FIG. 1, the production line 1 has a configuration including a shear line 2 disposed via a cooling bed 4 downstream of a rolling line 3 for rolling the steel plate I. The rolling line 3 is provided with, for example, a rolling mill 10 and a forced cooling device 11. The steel plate I is conveyed on the rolling line 3 in the conveying direction X (in the right direction in FIG. 1) indicated by the arrow in FIG. 1 and rolled, and then on the cooling bed 4 in the direction Y orthogonal to the conveying direction X. It is transported and cooled to a predetermined temperature, and then transported in the transport direction X on the shearing line 2 and sheared. In the present embodiment, when the right steel plate I is transported on the shear line 2, its longitudinal direction is parallel to the transport direction X and its width direction is parallel to the direction Y perpendicular to the transport direction X. It is transported in the state that was made.

  For example, a walking beam type cooling floor is used as the cooling floor 4. In the present embodiment, the cooling floor 4 is formed by rolling the steel plate I having a length in the longitudinal direction of, for example, about 20 m, from the rolling line 3 toward the shear line 2 in the width direction Y without changing the direction. It is comprised so that it may convey. The rolling line 3, the cooling bed 4, and the shear line 2 are provided with a plurality of detection devices 20 to be described later so as to detect the position of the steel plate I. Based on the detection information of these detection devices 20. The position of each steel plate I is tracked by a control device 32 or the like which will be described later. Based on this tracking information, each steel plate I conveyed through the rolling line 3, the cooling bed 4, and the shear line 2 is individually identified, and the steel plate information (for example, the dimensions of the steel plate I) of each steel plate I will be described later. It is possible to obtain the following occupancy rate from the online computer 33 and process it.

  In the present embodiment, the value obtained by adding the lengths in the conveying direction (Y in FIG. 1) of the steel sheet I currently being conveyed on the cooling bed 4 is divided by the length in the width direction Y of the entire cooling bed 4. The obtained value is defined as the occupation ratio of the steel plate I to the cooling floor 4. Preferably, not only the cooling bed 4 but also the area including the rolling line 3 and the shearing line 2 from the rolling mill 10 to the edge shearing machine 17 is obtained in the same manner as described above, and this occupation ratio is calculated. Use. Further, as will be described later, the occupation ratio of the steel plate I is used to determine the congestion state of the steel plate I when the steel plate I is transferred from the shear line 2, and exceeds 0.8 in this embodiment. In this case, it is determined that the congestion state of the steel sheet I conveyed on the shear line is large.

  In the shear line 2, a split shear machine 16, an edge shear machine 17, a longitudinal shear machine 18, and a finishing shear machine 19 are arranged along the conveyance direction X (right direction in FIG. 1) of the steel plate I. In the present embodiment, the steel plate I is transferred from the shear line 2 to the outside of the shear line 2 to the transfer position P downstream of the split shearing machine 16 and upstream of the edge cutting shearing machine 17, or from the shear line 2 to the shear line 2. A transfer device 30 for returning the steel plate I to the top is provided. FIG. 2 is a perspective view of the transfer device 30. FIG. 3 is a schematic configuration diagram of the transfer device 30 viewed in the conveyance direction X of the steel plate I.

  As shown in FIG. 2, the shear line 2 has a configuration in which the steel plate I is transported by the rotation of a plurality of transport rolls R. In the shear line 2, a plurality of detection devices 20 that detect the position of the steel plate I to be conveyed are provided along the shear line 2 from the start end to the end, for example, at predetermined intervals. Each of the plurality of detection devices 20 is mounted between the transport rolls R, and irradiates light, electromagnetic waves or the like upward, and senses shielding or reflection of the irradiated light, thereby detecting a steel plate present at each detection position. I can be detected. In the present embodiment, the detection device 20 can detect both the start of the conveyance of the steel plate I to the transfer position P and the completion of the conveyance of the steel plate I to the transfer position P. Has been.

  The split shearing machine 16 shears the steel plate I conveyed on the shear line 2 along the width direction Y, and a plurality of steel plates I each having a predetermined length in the longitudinal direction (that is, the conveying direction) X. It is a shearing machine that can be divided into two.

  The edge-cutting shearing machine 17 is a shearing machine capable of shearing the steel sheet I conveyed on the shearing line 2 along the longitudinal direction X and cutting both ends in the width direction Y of the steel sheet I called so-called ears. .

  The longitudinal shearing machine 18 shears the steel sheet I conveyed on the shear line 2 along the longitudinal direction X, and the length in the width direction Y is the length in the width direction Y that is finally shipped. It is a shearing machine that can be divided into steel plates I.

  The finishing shearing machine 19 shears the steel sheet I transported on the shear line 2 along the width direction Y, and the length in the longitudinal direction (that is, the transport direction) X is the length in the longitudinal direction X that is finally shipped. This is a shearing machine capable of performing final finishing by dividing it into a plurality of steel plates I.

  The above-described split shearing machine 16, edge cutting shearing machine 17, longitudinal shearing machine 18, finishing shearing machine 19 and transfer device 30 are connected to a control device 32. The control device 32 can acquire information from these devices 16 to 19 and 30 and can individually control the operations of these devices 16 to 19 and 30. The control device 32 is also connected to a detection device 20 described later that detects the position of the steel sheet I on the shear line 2. The control device 32 is also connected to a later-described transport roll R for transporting the steel plate I on the shear line 2, and individually controls the transport of each steel plate I, for example, a partial area on the shear line 2. It is possible to temporarily stop the conveyance of the steel sheet I.

  Further, the control device 32 is connected to a host online computer 33 that controls the entire production line 1. Thereby, the control device 32 receives various information (for example, information on the steel sheet I in the rolling line 3 and the cooling bed 4, tracking information in the entire production line 1, etc.) that the control device 32 itself does not hold or manage from the online computer 33. On the contrary, it is possible to transmit the information about the steel plate I in the shear line 2 held or managed by the control device 32 itself to the online computer 33. Thereby, as described, the control device 32 acquires the steel plate information (for example, the dimensions of the steel plate I) of each steel plate I from the host computer 33, and based on these information, the cooling bed 4 and the shear line 2 are obtained. It is possible to calculate the occupancy ratio of the steel plate I with respect to.

  The transfer device 30 is controlled by a connected control device 32, and the steel plate I transferred to the transfer position P is arranged on the basis of the length in the transfer direction X with three retraction positions Q1 to Q1 provided outside the shear line 2. It is configured in advance so that it can be transferred to any of Q3. In the present embodiment, a retreat position for transferring a steel sheet I having a length in the transport direction X of, for example, 9 m or more and 12 m or less on the steel plate mounting table 25 disposed on the right side of the transfer position P when viewed in the transport direction X. Q1 is provided. On the other hand, on the steel plate mounting table 26 disposed on the left side of the transfer position P when viewed in the transport direction X, a retreat position Q2 for retracting the steel plate I having a length in the transport direction X of, for example, 6 m or more and less than 9 m, A retreat position Q3 for retracting a steel sheet I having a length in the transport direction X of, for example, 3 m or more and less than 6 m is provided adjacent to the transport direction. Therefore, in the present embodiment, the steel plate I whose length in the transport direction X is less than 3 m and the steel plate I that exceeds 12 m are set so as not to be selected as objects to be transferred by the transfer device 30. In the present embodiment, the case where the lengths in the width direction Y of the retracted positions Q1 to Q3 are substantially the same will be described, but the lengths of the retracted positions Q1 to Q3 in the width direction Y may be different. .

  The transfer device 30 passes from above the steel plate mounting table 25 (that is, the retreat position Q1), passes above the shear line 2 (that is, the transfer position P), and above the steel plate mounting table 26 (that is, the retreat positions Q2 and Q3). Up to this point, the carriage 40 can be driven by the wheels 36 on the two rails 35 extending in parallel along the width direction Y orthogonal to the conveying direction X of the steel plate I. A steel plate holding portion 41 is provided along the transport direction X on the lower side of the carriage 40. The steel plate holding portion 41 is provided on the carriage 40 through a lifting mechanism 38 such as a piston so as to be movable up and down. A plurality of magnets 45 capable of attracting and holding the steel plate I are provided below the steel plate holding portion 41. The carriage 40 moves on the rail 35 along the direction Y orthogonal to the conveying direction X of the steel plate I by driving the wheels 36, and as shown in FIG. 3, the steel plate holding part 41 and the magnet 45 are sheared. Reciprocating between the transfer position P on the line 2 and the retreat position Q1 on the steel plate mounting table 25, or reciprocating between the transfer position P on the shear line 2 and the retreat positions Q2 and Q3 on the steel plate mounting table 26 It is possible to make it.

  In this embodiment, when the length in the transport direction X of the steel plate I to be transferred or returned is 3 m or more and less than 6 m, the steel plate I is transferred or retracted between the transfer position P and the retreat position Q3. When the work is performed and the length in the transport direction X is 6 m or more and less than 9 m, the steel sheet I is set to be transferred or retracted between the transfer position P and the retracted position Q3. On the other hand, when the length in the transport direction X is 9 m or more and 12 m or less, the steel sheet I is set to be transferred or retracted between the transfer position P and the retracted position Q1.

  The steel plate holding portion 41 can transfer the steel plate I to the retreat positions Q1 to Q3 of the steel plate mounting tables 25 and 26, and the lowered position V where the steel plate I can be transferred to the transfer position P of the shear line 2 by the operation of the lifting mechanism 38. It can be moved up and down to the intermediate position W. Further, it is possible to raise the steel plate holding portion 41 to the highest position U, which is the highest position, by operating the lifting mechanism 38 and to move the carriage 40 between the transfer position P and the retreat position Q2 in this state. In the present embodiment, the case where the intermediate position W is located between the lowered position V and the raised position U will be described. However, the intermediate position W may be lower than the lowered position V. Note that the transfer of the steel plate I at the transfer position P and the transfer of the steel plate I at the retreat position Q can be executed by attracting or releasing the magnet 45 that moves up and down together with the steel plate holding part 41.

  In the present embodiment, the magnets 45 provided in the steel plate holder 41 are arranged at equal intervals so that the width direction Y is 4 rows and the transport direction X is 10 rows. As the magnet 45, an electromagnet or the like that can be individually excited and released as necessary is used.

  When producing a thick steel plate on the thick steel plate production line 1 configured as described above, the steel plate I conveyed on the shear line 2 is adjusted using the steel plate conveyance control method according to the embodiment of the present invention. The procedure to do is explained. Adjustment of the steel plate I conveyed on the shear line 2 is performed when the steel plate I on the shear line 2 is heavily congested and the steel plate I is placed on the steel plate mounting tables 25 and 26 outside the shear line 2 from the shear line 2. When the state of congestion of the steel plate I on the shear line 2 is small, the steel plate I is returned to the shear line 2 from the steel plate mounting tables 25 and 26 outside the shear line 2. In the following, the transfer control and the return control by the control device 32 will be described separately, but these controls are set so that only one is executed by the control device 32 or the upper online computer 33.

  FIG. 4 is a flowchart showing a transfer control procedure executed by the control device 32 when the steel plate I transported on the shear line 2 is transferred to the steel plate mounts 25 and 26 outside the shear line. FIG. 5 is a flowchart for explaining in detail the procedure (step 5 in FIG. 4) when the steel plate I to be transferred is actually transferred. FIG. 6 is a flowchart showing a return control procedure executed by the control device 32 when the steel plate I transferred to the steel plate mounting tables 25 and 26 outside the shear line 2 is returned to the shear line 2. FIG. 7 is a flowchart for explaining in detail the procedure (step 53 in FIG. 5) for actually returning the steel plate I to be returned.

  First, the transfer control procedure will be described. When the transfer control is started (step 0), the control device 32 analyzes the tracking information of the steel sheet I conveyed on the shear line 2, and the steel sheet conveyed on the shear line 2 based on the congestion state. It is determined whether or not I needs to be transferred (step 1). In the present embodiment, the occupation ratio of the steel plate I on the shear line 2 (for example, when the shear line 2 is divided into blocks for each predetermined length along the conveying direction, the total number of blocks in which the steel plate I exists) The ratio is determined based on the ratio of the number of blocks) and the degree of labor of the shearing process performed on each steel sheet I (for example, the number of times the finishing shearing machine 19 shears the steel sheet I).

  When the occupation ratio of the steel plate I on the shear line 2 is below a predetermined threshold value and the congestion state of the steel plate I is small, it is determined that there is no need to transfer (No in step 1), the shear line 2 It waits until it becomes necessary to transfer the steel plate I conveyed above. On the other hand, when the occupation ratio of the steel sheet I on the shear line 2 is equal to or greater than a predetermined threshold and the congestion state of the steel sheet I is large, when it is determined that it is necessary to transfer (Yes in step 1), Whether or not the steel plate I has arrived before the split shearing machine 16 is determined based on the tracking information of the steel plate I (step 2).

  When the steel plate I has not arrived in front of the split shearing machine 16 (No in step 2), while the steel plate I needs to be transferred, until the steel plate I reaches in front of the split shearing machine 16 stand by. On the other hand, if the steel plate I has arrived in front of the split shearing machine 16 (Yes in step 2), it is determined whether or not the steel plate I can be transferred after being split sheared by the split shearing device 16. (Step 3). In the present embodiment, when the length in the transport direction X of each steel plate I divided into a plurality of parts by split shear is less than 3 m or more than 12 m, it is determined that transfer by the transfer device 30 is impossible. To do. When it is determined that the transfer is impossible (No in Step 3), the process waits until the next steel plate I reaches the front of the split shearing machine 16 while the steel plate I needs to be transferred. The determination of whether or not transfer is possible is repeated.

  On the other hand, since the steel plate I to be transferred has a length in the transport direction X of 3 m or more and 12 m or less after the split shear, when it is determined that the transfer is possible (Yes in step 3), the steel plate I It is confirmed whether the divided shear has already been completed (step 4). If the split shear of the steel plate I has not been completed (No in Step 4), the process waits until the split shear of the steel plate I is completed. On the other hand, when the divided shearing of the steel plate I has been completed (Yes in step 4), the steel plate I to be transferred among the plurality of divided steel plates I is transferred to the retreat positions Q1 to Q3 outside the shear line 2. The work to be performed is executed (step 5).

  FIG. 8 is a configuration diagram showing the arrangement of the preparation position O, the transfer position P on the shear line 2 and the retreat positions Q1 to Q3 of the steel plate mounting tables 25 and 26. When the conveyance of the steel plate I to be transferred is started (step 20 in FIG. 5), first, it is detected that the steel plate I to be transferred conveyed on the shear line 2 from the split shearing machine 16 reaches the preparation position O. (Step 21 in FIG. 5). In the present embodiment, the steel plate I to be transferred reaches the preparation position O by detecting the leading end in the transport direction X of the steel plate I to be transferred by the detection device 20 provided at the preparation position O.

  Based on the length in the transport direction X, the retraction position for transferring the steel plate I to be transferred is determined in advance from among the three retraction positions Q1 to Q3. In the steel plate I to be transferred shown in FIG. 8, since the length in the transport direction X is 9 m or more and 12 m or less, the steel plate I is transferred to the retreat position Q1. Below, as shown in FIG. 8, the case where the steel plate I to be transferred is transferred to the retreat position Q1 will be described. However, the transfer operation can be performed in the same manner when the steel plate I is transferred to the retreat positions Q2 and Q3.

After the detection device 20 detects that the preparation position O has been reached, as shown in FIG. 8, the center in the transport direction of the retreat position Q1 to which the center in the transport direction X of the steel plate I to be transferred is Transport to the matching transfer position P (step 22 in FIG. 5). In the present embodiment, the control device 32 has a length L in the transport direction X of the steel plate I to be transferred obtained from the steel plate information held in advance, and the transport direction to the centers of the preparatory preparation position O and the retreat position Q1. The transport distance {L ₁ + (L / 2)} is calculated from the length L _{1 of} X, and the steel plate I to be transferred reaching the preparation position O is calculated as the transport distance {L ₁ + (L / 2) }, The transport roll R is controlled so as to transport on the shear line 2. When transporting from the preparation position O to the transfer position P that coincides with the center in the transport direction of the retreat positions Q2 and Q3, the steel sheet I is transported from the preparation position O by a transport distance {L ₂ + (L / 2)}, Control is performed so as to convey on the shear line 2 by {L ₃ + (L / 2)}.

  Next, the steel plate I to be transferred at the transfer position P is transferred to the retreat position Q1 by the transfer device 30 (step 23 in FIG. 5). In the present embodiment, the steel plate holding part 41 of the carriage 40 at the transfer position P is lowered to the lowered position V, and the magnet 45 is excited to attract and hold the steel plate I to be transferred at the transfer position P. The steel plate holding part 41 is raised to the raised position U. When attracting and holding the steel plate I to be transferred, a part of the magnet 45 is arranged so that the lengths of the portions not attracted and held by the magnet 45 at both ends in the transport direction X of the steel plate I are substantially equal. Alternatively, all of them are appropriately excited and held by suction. Further, magnets 45 that are not completely in contact at both ends in the conveying direction X of the steel plate I are not excited.

  Next, after the carriage 40 is moved along the rail 35 to the retracted position Q1, the steel plate holding portion 41 is lowered to the intermediate position W, and the magnet 45 is de-energized to release the magnet 45, thereby attracting and holding the steel plate to be transferred. I is placed at the retracted position Q1 on the steel plate placing table 25. With the above procedure, the transfer of the steel plate I to be transferred to the retreat positions Q1 to Q3 is completed (step 24 in FIG. 5).

  Next, the control device 32 confirms whether or not the operation of transferring the steel plate I to be transferred to the retreat position Q1 has been completed normally (step 6). When the transfer operation shown in the flow chart of FIG. 5 has been completed normally (Yes in step 6), the control device 32 causes the online computer 33 to transfer the steel plate I to be transferred to the retreat position Q1 normally. The completion is transmitted together with each information of the steel plate I to be transferred, and the information of the steel plate I held by the online computer 33 is updated. Furthermore, the tracking information of the steel plate I held by the control device 32 itself is updated at the same time (step 7). On the other hand, for example, when the transfer operation is not completed normally, such as when the transfer device 30 is not operated, the transfer operation is stopped (step 8).

  Thereafter, returning to the first procedure, it is determined whether or not the steel plate I on the shear line 2 needs to be transferred (step 1), and the above-described series of transfer control procedures are repeated.

  Next, the return control procedure will be described. When the return control is started (step 50), the control device 32 owns and manages the occupation ratio of the steel plate I to the cooling floor 4 calculated based on various information acquired via the online computer 33, and the control device 32 itself holds and manages. Analyzing the tracking information of the steel plate I and calculating the time zone during which the steel plate I transferred to the retreat positions Q1 to Q3 can be returned to the shear line 2 (that is, the time zone when the steel plate I is congested is small). (Step 51).

  The control device 32 makes an inquiry to the upper online computer 33, and the steel plate I that can be returned to the empty space generated at the transfer position P on the shear line 2 in the time zone calculated as described above is the retracted position. It is determined based on the length of the empty space in the transport direction whether or not it is in Q1 to Q3 (step 52). When there is no steel plate I that can be returned to an empty space in any of the retreat positions Q1 to Q3 (No in step 52), it is possible to return to the beginning of the return control procedure and return the transferred steel plate I. Calculate the correct time zone again.

  When the steel plate I to be returned that can be returned to the empty space generated at the transfer position P on the shear line 2 exists in the retreat positions Q1 to Q3 (Yes in step 52), any one of the retreat positions Q1 to Q3 The work to return the steel plate I to be returned to the transfer position P at the timing when the empty space is generated is executed (step 53). In the present embodiment, when there are a plurality of steel plates I that can be returned to the empty space generated on the shear line 2 at the retreat positions Q1 to Q3, priority is given to the steel plate I having a longer length in the transport direction. Thus, the steel sheet I is set back (that is, in the priority order of Q1, Q2, and Q3). Below, the case where the steel plate I in the retracted position Q1 is returned to the shear line 2 will be described.

  When the return of the steel plate I to be returned to the transfer position P is started (step 60 in FIG. 7), the control device 32 enables the return position of the steel plate I to be returned to the shear line 2 and its transfer position P. The operation of the transport roll R at the immediately preceding position is stopped, the transport operation at the transfer position P is stopped in the shear line 2, and the steel plate I is set not to be transported from the upstream of the transfer position P to the transfer position P (see FIG. 7 step 61).

  Next, the steel plate I to be returned at the retreat position Q1 is returned to the transfer position P by the transfer device 30 (step 62 in FIG. 7). In the present embodiment, first, the carriage 40 is moved from the transfer position P to the retreat position Q1. The steel plate holding portion 41 of the carriage 40 at the retreat position Q1 is lowered to the intermediate position W, and the magnet 45 is excited to attract and hold the steel plate I to be returned at the retreat position Q1. Raise to U. When attracting and holding the steel plate I to be returned, the lengths of the portions not attracted and held by the magnet 45 at both ends in the direction Y orthogonal to the conveying direction X of the steel plate I are substantially equal. A part or all of the magnet 45 is appropriately excited to be attracted and held. Next, the carriage 40 is moved along the rail 35 to the transfer position P, the steel plate holding part 41 is moved down to the lowered position V, and the magnet 45 is de-energized to release the attracted and held steel plate I to be returned. Is placed at the transfer position P on the shear line 2.

  After returning the steel plate I to be returned to the transfer position P on the shear line 2, the operation of the transport roll R at the transfer position P that has been stopped and the position immediately before it is resumed (step 63 in FIG. 7). With the above procedure, the return of the steel plate I to be returned to the transfer position P is completed (step 64 in FIG. 7). In the present embodiment, there is one steel plate I to be returned to the shear line 2 by one return operation, but a plurality of steel plates I to be returned are put on the shear line 2 by one return operation. You may make it return.

  Next, the control device 32 confirms whether or not the work of returning the steel plate I to be returned to the transfer position P has been completed normally (step 54). When the return operation shown in the flowchart of FIG. 7 has been completed normally (Yes in step 54), the control device 32 causes the online computer 33 to return the steel plate I to be returned to the transfer position P normally. The completion is transmitted together with each information of the steel plate I to be returned, and the information etc. of the steel plate I held by the online computer 33 is updated. Further, the tracking information of the steel plate I held by the control device 32 itself is updated at the same time (step 55). On the other hand, if the return operation does not end normally, for example, when the transfer device 30 does not operate, the return operation is stopped (step 56). Thereafter, returning to the first procedure, a time zone during which the steel plate I transferred to the retreat positions Q1 to Q3 can be returned to the shear line 2 is calculated (step 51), and the above-described series of return control procedures are repeated. .

  According to the above embodiment, when the state of congestion on the shear line 2 of the steel plate I conveyed on the shear line 2 is large, the steel plate I at the transfer position P of the shear line 2 is conveyed. Based on the length in the direction X, it is transferred to one of the retreat positions Q1 to Q3 and the amount of the steel sheet I conveyed on the shear line 2 is adjusted and optimized. Even when the capacity exceeds the processing capacity of the shear line 2, the number of the steel plates I on the shear line 2 is prevented from becoming excessive, and the steel plate I waiting for the shear processing is accumulated on the shear line 2 and the rolling line 3 is stopped. It is possible to avoid line troubles that must be avoided. Thereby, the processing capacity per hour of the shear line 2 is smoothed, the line operation is stabilized, the productivity of the shear line 2 is improved, and the efficiency of the entire thick steel plate production line is improved.

  Further, when the state of congestion of the steel sheet I conveyed on the shear line 2 is small, the steel sheet I is retreated into an empty space generated on the shear line 2 based on the length in the conveyance direction X. Since the steel plate I in any of the positions Q1 to Q3 is returned and the amount of the steel plate I conveyed on the shear line 2 is adjusted and optimized, the number of the steel plates I on the shear line 2 decreases. The steel plate I is replenished from the steel plate mounting tables 25 and 26 outside the shear line 2, the processing capacity per hour of the shear line 2 is smoothed, the line operation is stabilized, and the productivity of the shear line 2 is improved. In addition, the overall efficiency of the thick steel plate production line 1 is improved.

  Further, by providing a plurality of retreat positions Q1 to Q3 outside the shear line 2 and transferring and returning the steel plate I according to the length in the transport direction X, the steel plate I transported on the shear line 2 is provided. When the lengths of the steel plates are various, it is possible to appropriately and efficiently transfer the various steel plates I to the outside of the shear line 2 and return them to the shear line 2.

  Further, when the transfer device 30 is used to transfer or return the steel plate I, the steel plate 45 is symmetrically arranged on both sides of the center in the transport direction X of the steel plate I (to be transferred or returned). By attracting and holding I, the transfer work and return work of the steel sheet I can be performed stably. Further, when the steel plate I is attracted and held by the magnet 45, the magnets 45 that are not completely in contact at both ends in the transport direction X of the steel plate I are not excited, so that during the transfer operation or the return operation, It is possible to prevent the magnet 45 protruding from the steel plate I from colliding with, for example, the transport roll R below the steel plate I and damaging the magnet 45 or the transport roll R.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, this invention is not limited to the example which concerns. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

  In the embodiment described above, the case where the shear line 2 is connected downstream of the rolling line 3 has been described. However, the shear line 2 may be connected to other lines, or only the shear line 2 alone. It may be used.

  In the above-described embodiment, the case where the shear line 2 has a configuration in which the split shearing machine 16, the edge shearing machine 17, the longitudinal shearing machine 18, and the finishing shearing machine 19 are arranged along the conveying direction X of the steel sheet I will be described. However, the shear line 2 may have another arrangement order or other configuration.

  In the above-described embodiment, the case where the control device 32 is a control system configuration connected to the host computer 33 that controls the entire production line 1 has been described. However, other control system configurations may be used. .

  In the above-described embodiment, the detection device 20 is mounted between the transport rolls R, irradiates the transport to the detection position of the steel plate I with light or electromagnetic waves upward, and senses the shielding or reflection of the irradiated light. However, a detection device that detects the transported steel sheet I by another mechanism, such as detecting the transport of the steel sheet I to the detection position by sensing the weight of the steel sheet I, is used. Also good.

  In the above-described embodiment, the case where the magnet 45 is an electromagnet has been described. However, the magnet 45 may be a magnet other than an electromagnet.

  In the embodiment described above, the case where the number of the magnets 45 included in the steel plate holding portion 41 is 40, and the width direction Y is arranged in four rows and the conveyance direction X is arranged in ten rows so as to be arranged at equal intervals. However, the number of magnets 45 may be other than 40, or may be another arrangement configuration.

  In the above-described embodiment, the case where there is a single steel plate holding portion 41 has been described. However, a plurality of steel plate holding portions 41 that can be operated separately may be used.

  In the embodiment described above, the case where the walking beam type cooling floor 4 is used has been described, but other cooling floors may be used.

  In the embodiment described above, when determining whether or not it is necessary to transfer the steel plate I, the occupation ratio of the steel plate I on the shear line 2 and the degree of labor of the shearing process performed on each steel plate I are determined. Although the case where the determination is made based on the above has been described, the determination may be made based on other information.

  In the embodiment described above, when determining whether or not it is necessary to return the steel plate I, the determination is based on the occupation ratio of the steel plate I with respect to the cooling floor 4 and the tracking information of the steel plate I owned and managed by the control device 32 itself. However, the determination may be made based on other information.

  In the above-described embodiment, the retreat position is divided into three, Q1, Q2 and Q3, and the retreat position Q1 is provided on the steel plate mounting table 25 disposed on the right side of the transfer position P when viewed in the transport direction X. The case where the retreat positions Q2 and Q3 are provided adjacent to each other on the steel plate mounting table 26 arranged on the left side of the transfer position P when viewed in the transport direction X has been described. May be other than 3, and the retreat position may be another arrangement configuration.

  The present invention can be applied to, for example, a shear line connected downstream of a rolling line, but is also useful when a shear line connected to another line or a shear line is used alone.

It is a block diagram which shows a part of structure of the production line 1 of the thick steel plate to which the control apparatus 32 suitable for implementing this invention was applied. 3 is a perspective view of a transfer device 30. FIG. FIG. 3 is a schematic configuration diagram when the transfer device 30 is viewed in the conveyance direction X of the steel plate I. It is a flowchart which shows the procedure of the transfer control which the control apparatus 32 performs when transferring the steel plate I conveyed on the shear line 2 out of a shear line. It is a flowchart explaining in detail the procedure (step 5 of FIG. 4) at the time of actually transferring the steel plate I to be transferred. It is a flowchart which shows the procedure of the return control which the control apparatus 32 performs when returning the steel plate I transferred out of the shear line 2 on the shear line 2. FIG. It is a flowchart explaining in detail the procedure (step 53 in FIG. 6) when actually returning the steel plate I to be returned. 3 is a configuration diagram showing the arrangement of a preparation position O on the shear line 2, a transfer position P, and retreat positions Q1 to Q3 outside the shear line 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Production line of thick steel plate 2 Shear line 3 Rolling line 4 Cooling bed 10 Rolling machine 11 Cooling device 16 Divided shearing machine 17 Edge cutting shearing machine 18 Vertical shearing machine 19 Finishing shearing machine 20 Detection apparatus 25, 26 Steel plate mounting table 30 Transfer device 32 Control device 35 Rail 36 Wheel 38, 39 Elevating mechanism 40 Cart 41 Steel plate holder 45 Magnet I Steel plate L Length in the transport direction of the steel plate to be transferred L ₁ Length in the transport direction to the center of the preparation position O and the retreat position Q1 L ₂ Length in the transport direction to the center of the preparation position O and the retreat position Q2 L ₃ Length in the transport direction to the center of the preparation position O and the retraction position Q3 P Transfer position on the shear line Q1 to Q3 Outside the shear line Evacuation position R Conveying roll U, V, W Elevating position of steel plate holder and magnet X Conveying direction of steel plate on shear line Y Conveying method of steel plate Direction perpendicular to direction Z vertical direction

Claims (6)

A method of transferring a part of a steel sheet conveyed on a shear line that is rolled in a rolling line and cooled to a predetermined temperature after being cooled to a predetermined temperature to a retreat position provided outside the shear line,
Based on the congestion state of the steel plates on the shear line, it is determined whether or not the steel plates on the shear line are transferred to the retreat position, and the steel plates to be transferred that are determined to be transferred are transferred to the retreat position. The steel sheet transport control method. The retreat position is divided into a plurality of pieces in advance, and when it is determined that the steel plate on the shear line is transferred to the retreat position, the retreat position is divided into the plurality based on the length in the transport direction of the steel plate to be transferred. 2. The steel sheet conveyance control method according to claim 1, wherein a position to be transferred is determined, and the steel plate to be transferred is transferred to the determined position. When the steel plate to be transferred is transferred to the retracted position, the steel plate to be transferred on the shear line is transported to a transfer position where the center in the transport direction coincides with the center in the transport direction of the retracted position. The steel sheet conveyance control method according to claim 1, wherein the steel sheet conveyance control method is provided. When the steel plate to be transferred is transferred to the retreat position, the steel plate is transferred by suction holding with a magnet. At that time, the steel plate to be transferred is a portion that is not held by suction with the magnet at both ends in the transfer direction. The steel sheet transport control method according to claim 1, wherein the lengths of the steel plates are substantially equal. Based on the congestion state of the steel plate on the shear line, it is determined whether or not the steel plate transferred to the retreat position is to be returned to the shear line. Determining which of the steel plates transferred to the retreat position to be returned to the empty space based on the length in the direction, and transferring the determined steel plate to be returned onto the shear line, Item 5. A steel sheet conveyance control method according to any one of Items 1 to 4. When returning the steel plate to be returned onto the shearing line, it is attracted and held by a magnet and transferred. At that time, the steel plate to be transferred is attracted and held by the magnet at both ends in a direction perpendicular to the conveying direction. The steel sheet transport control method according to claim 5, wherein the lengths of the unfinished portions are substantially equal.

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