JPH08324747A - Walking beam controller - Google Patents

Abstract

(57) [Summary] [Object] The present invention is to accurately grasp the initial position of a material to be conveyed and to obtain an appropriate switching timing. A control device, in which a front walking beam 6 and a rear walking beam 7 are arranged with an interference portion, and which controls the transportation of the steel slab 2 in the furnace by the walking beam transportation, detects a steel slab passing through the interference portion. And the position of each billet is updated using the stroke amount of the walking beam transport at the completion of one cycle of the walking beam movement, and the sensor detects the passage of the first billet inserted into the furnace from the empty state of the furnace. The position of the first steel piece is corrected from the control means 12 that performs stop control when it is detected and the flow amount and sensor position until the walking beam after this stop control is completely stopped, and this position correction amount is applied to each subsequent position. This is a walking beam control device provided with an initial position correction means 12 for allocating to the steel slab.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved split walking beam control device used in a walking beam device for carrying an object to be transported using a walking beam.

[0002]

2. Description of the Related Art A walking beam device of this type is used, for example, when a steel slab in a heating furnace is conveyed, and as shown schematically in FIGS. (Walking beam) 52
And a driving source for raising and lowering and a driving source for traversing are installed on the side of the walking beam 52, and the walking beam 52 is repeatedly raised, moved forward, lowered, and restored by these driving sources as shown in the direction of arrow A in the figure. The steel pieces on the fixed beam 51 are transported from the heating furnace inlet side to the heating furnace outlet side.

By the way, in such a walking beam device, the walking beam 52 is divided into two, of which the heating furnace charging side is called the front walking beam and the heating furnace extraction side is called the rear walking beam. , A single operation of driving one of the walking beams 52 from the connecting operation of simultaneously driving the two walking beams 52 according to the position of the steel piece, or conversely, switching from the single operation to the connecting operation of the steel piece on the heating furnace extraction side. Is being carried to. Specifically, a steel piece is conveyed while simultaneously operating the front walking beam on the heating furnace loading side and the rear walking beam on the heating furnace extraction side, but a certain steel piece passes through an intermediate position between the two walking beams. Then, when completely moving to the transportable area of the rear walking beam, by switching from the connecting operation to the single operation, that is, the single operation of the rear walking beam, the steel piece and the steel piece next to the steel piece concerned are separated. It is carried out while being separated by distance.

Conventionally, from such a connecting operation to a single operation,
Alternatively, when switching from the independent operation to the connection operation, the operator determines the switching timing while checking the position of the steel slab. Especially, the accuracy of the steel slab position in the part where the two walking beams interfere, that is, in the middle part of the heating furnace. Since it is not certain that the steel pieces that are the switching targets of the operation modes (the coupling operation and the independent operation) have a sufficient distance, the tracking accuracy is absorbed by the sufficient distance.

On the other hand, the means for correcting the position of the steel billet in the furnace for improving the tracking accuracy has an extraction tip sensor installed on the extraction side in the furnace, and when the extraction tip sensor detects the steel billet during the operation of the walking beam. By moving the walking beam to the descending operation, the billet position on the extraction end side in the furnace is corrected based on the stroke amount and the extraction end sensor position until the completion of the independent operation of the rear walking beam,
According to this correction, the position of the subsequent billet is corrected. This can be realized because the extraction end sensor is installed on the most extraction port side of the heating furnace, so that the extraction end sensor can determine that the steel piece is at the most extraction port of the heating furnace.

[0006] Further, an intermediate sensor is installed at an intermediate position in the heating furnace to detect passage of the steel slab at the intermediate position. Yes, it is not possible to identify which steel piece in the heating furnace is captured, or which steel piece is the one if the position of the steel piece is slightly shifted. Therefore, the detection of the steel slab by this intermediate sensor has a lower certainty than the case of the correction by the detection of the steel slab by the extraction end sensor, and if the determination as to which steel slab is erroneous, one steel slab Will be misaligned. Therefore, during the connecting operation of the walking beam 52, the billet position is not corrected with respect to the billet passing through the intermediate portion of the heating furnace.

[0007]

However, in recent years, with the advent of the joining and rolling technique in the hot rolling, there has been a need to positively use the connecting operation and the single operation separately. In this joining and rolling technique, joining and rolling is performed for each group of a plurality of steel pieces, and therefore it is necessary to transport the inside of the heating furnace separately for each group of steel pieces into a front walking beam and a rear walking beam. In this case, since the steel pieces are conveyed in groups, the extraction interval from the heating furnace due to the joining restrictions of the rolling line and the charging interval into the heating furnace due to the restrictions of the upstream process can be set independently.

By the way, the transportation of the steel bill group unit incorporating such joining and rolling technique is performed from the coupling movement when the last steel billet of the preceding group reaches a position where it can be transported by the rear walking beam by the coupling operation. By switching to independent operation with the rear walking beam,
It is necessary to separate the last bill of the previous group and the first bill of the subsequent group, but in this case there is information that the last bill of the previous group has definitely passed the intermediate sensor. You will need it.

However, in the conventional method of tracking the billet, since there is no certainty in the accuracy of the detected position of the billet by the intermediate sensor, the connection operation is switched to the independent action in accordance with the billet position information by the intermediate sensor. If this is done, the steel strip required for joining and rolling is left in the front walking beam, and the single operation of the rear walking beam is switched to convey the billet, which prevents smooth transportation and uniform joining and rolling. There is.

The present invention has been made in view of the above circumstances, and provides a walking beam control device for increasing the detection accuracy of the initial position of a material to be conveyed by inserting the inside of the furnace from the empty state of the furnace and obtaining an appropriate switching timing. The purpose is to

Another object of the present invention is to provide a walking beam control device for improving the tracking accuracy of a material to be conveyed. Further, another object of the present invention is to provide a walking beam control device that appropriately switches between connecting operation and independent operation.

[0012]

In order to solve the above problems, the invention according to claim 1 is such that a front walking beam and a rear walking beam are arranged in a furnace with an interference portion, and both walking beams are connected. In a walking beam control device for carrying and controlling a material to be carried in a furnace while performing an operation or an independent operation, a material to be carried which passes through the interference portion is detected by an independent operation of the front walking beam or a connecting operation of both walking beams. The position of each material to be conveyed is sequentially updated by using the stroke amount of the walking beam transportation at each completion of one cycle of the operation of the sensor and the walking beam alone or the coupling operation of both the walking beams, and the sensor moves to the furnace Of the first material to be loaded into the furnace from the empty state A control means for stopping and controlling the independent operation or the connecting operation when an excess is detected, and a flow amount and a flow amount of the sensor that move until the walking beam is completely stopped after the walking beam transportation is stopped by the control means. The position is corrected by using the position and the initial position of the material to be conveyed is corrected, and the position correction amount is allocated in accordance with the update position (distance) of each subsequent material to be moved. It is a beam control device.

The invention according to claim 2 is characterized in that the front walking beam and the rear walking beam are arranged in the furnace with an interference portion, and the materials to be conveyed in the furnace are connected while the two walking beams are connected or operated independently. In a walking beam control device for controlling conveyance, a sensor for detecting a material to be conveyed which passes through the interference portion by an independent operation of the front walking beam or a connecting operation of both walking beams, and charging into the furnace from an empty state of the furnace The first conveyed material is detected by the sensor and the initial position determining means for determining the initial position of each conveyed material, and after the initial position is determined by the initial position determining means, the connecting operation of both walking beams or the rear walking beam When the walking beam is transported by the single motion of the Count the number of times of detection of Okuzai,
The conveyed material specifying means for specifying the conveyed material that has moved to the rear side walking beam, and the stroke amount from the conveyed material detection ON to the detection OFF by the sensor exceeds a predetermined width or length of the conveyed material. At this time, the walking beam control device is provided with a count backup means for incrementing the count value by +1.

Next, the invention according to claim 3 is such that a front walking beam and a rear walking beam are arranged in the furnace with an interference portion, and a plurality of conveyed material groove units mounted on the front walking beam. In the walking beam control device that transfers to the rear walking beam for each and conveys, a sensor for detecting the conveyed material passing through the interference portion, the last conveyed material of the leading group and the leading portion of the next succeeding group. Interval setting means for setting the distance to the material to be conveyed to at least the maximum stroke amount of the walking beam, and the sensor, after detecting the last material to be conveyed in the first group, based on the set interval. While recognizing the non-detection state of the material to be conveyed, the division between the first group and the next succeeding group is recognized. The top group is determined that the finished transferred to the rear walking beam, a walking beam control apparatus provided with a walking beam drive control means for performing the operations of the rear walking beam least.

Further, in the invention according to claim 4, the front walking beam and the rear walking beam are arranged in the furnace with an interference portion, and each of the plurality of conveyed material groove units mounted on the front walking beam is grouped. In the walking beam control device which transfers the rear side walking beam to convey the conveyed material passing through the interference portion, an intermediate sensor for detecting the conveyed material and a distance smaller than the width or the length of the conveyed material before and after the intermediate sensor. At least one front and rear sensor to be installed, the last conveyed material of the first group and the first conveyed material of the next succeeding group are set to an interval larger than the maximum stroke amount of the walking beam. When the interval setting means and the two adjacent sensors do not detect the conveyed material, A walking beam drive that recognizes the division of the leading group and the next succeeding group before and after the inter-sensor and determines that the leading group has finished moving to the rear walking beam, and at least performs the operation of the rear walking beam. It is a walking beam control device provided with a control means.

[0016]

Therefore, according to the invention corresponding to claim 1, by taking the above-mentioned means, the position at the time of charging the furnace by the charger is set when initially setting the initial position by charging the material to be conveyed. Is set as the initial position, and thereafter, the stroke amount of the walking beam is added to the initial position by the control means at each completion of one cycle of the front walking beam alone operation or the connecting operation of both walking beams to determine the position of each material to be conveyed. Update.

After that, the control means stops the operation of the walking beam when the first material to be conveyed is detected by the sensor. However, when the walking beam is in the middle stage of ascending-advancing-descent / restoring, it is completely controlled. A flow amount is generated on the extraction end side by the time it is stopped. Therefore, the initial position correction means performs the first position correction of the conveyed material by using the flow amount and the position of the sensor that move until the walking beam is completely stopped after the control of the walking beam conveyance, and Since this position correction amount is allocated according to the subsequent updated position (distance) of each conveyed material, the initial position of the conveyed material can be accurately grasped.

Next, in the invention according to claim 2, after the initial position of the conveyed material is determined, the conveyed material specifying means counts the number of detections of the conveyed material from the output of the sensor when the walking beam is conveyed. The material to be conveyed that has moved to the rear walking beam is identified by. However, when the conveyed material is conveyed in a state where the distance between the conveyed materials is small, it may be recognized as one conveyed material. In this case, therefore, the count backup means detects the conveyed material from ON to OFF. When the stroke amount from detection on to detection off exceeds the width or length of the conveyed material, the count value is incremented by comparing the stroke amount of It is possible to improve the accuracy of identifying the conveying material. Further, by correcting the in-furnace position of the conveyed material specified by the count backup means from the amount of movement from the detection of the conveyed material by the sensor to the completion of one stroke, and performing the position of the succeeding conveyed material accordingly. The accuracy of the in-furnace position information can be improved.

Further, in the invention according to claim 3, the interval between the last conveyed material of the first group and the first conveyed material of the next succeeding group is set to be at least the maximum stroke amount of the walking beam or more. However, after the sensor detects the last transported material of the leading group, it recognizes the division between the leading group and the next succeeding group while observing the non-detected state of the transported material by the sensor based on the set interval. Since it is determined that the leading group has finished moving to the rear walking beam, it is possible to appropriately switch between the connecting operation and the independent operation.

Further, in the invention according to claim 4, since the sensors are arranged in front of and behind the intermediate sensor at a predetermined interval with the intermediate sensor interposed therebetween, when two adjacent sensors do not detect the material to be conveyed, the intermediate sensor The division between the leading group and the next succeeding group is recognized before and after, and it is determined that the leading group has finished moving to the back-side walking beam. Therefore, similarly, it is possible to appropriately switch between the connecting operation and the independent operation.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an embodiment of a split walking control device applied to, for example, a heating furnace. In the figure, reference numeral 1 denotes a heating furnace or the like as an application target. A charger 3 for charging a steel slab 2 is provided on the steel slab charging inlet side of the heating furnace 1, and a steel slab is provided on the steel slab extraction opening side from the furnace 1. An extractor 4 for extracting 2 is arranged. Further, in addition to the fixed beam 5 in the heating furnace 1, as well as the front walking beam 6 that operates on the moving trajectory of ascending → advance → descent / recovery → advance → advance →
A rear walking beam 7 that operates on a moving path for descending and restoring is arranged. The front walking beam 6 is arranged on the charging side inside the furnace, and the rear walking beam 7 is arranged on the extraction side inside the furnace.

These charger 3, extractor 4,
Front walking beam 6, rear walking beam 7
Are provided with drive units 8, 9, 10, and 11, respectively. These drive units 8, 9, 10, 11 control the operation of the charger 3, the extractor 4, the front walking beam 6, and the rear walking beam 7 in accordance with the operation command from the control unit 12. For the rear-side walking beam 7, the steel pieces 2, ... Are conveyed to the extraction end side while selectively performing the connecting operation of repeating ascending → forwarding → lowering / restoring and the independent operation.

Between the front walking beam 6 and the rear walking beam 7, a predetermined interference portion 1 is required.
3 is set, and the front walking beam 6 is in the range of the dotted line in the figure, that is, in the process of repeating the ascending → advance → lowering / restoring operation according to the arrow B in the figure
While moving to 5, the steel piece 2 on the fixed beam 5 is conveyed to the extraction side when moving forward, while the rear walking beam 7 moves upward → forward → descending / restoring operation in the range shown by the dotted line in the figure, that is, the arrow in the figure During the repeating process, the steel piece 2 on the fixed beam 5 is conveyed to the extraction side while moving to the front position 14 of the interference portion 13 and moving forward.

An intermediate sensor 16 for detecting the steel slab 2 is located near the line almost equal to the front position 14 of the interference portion 13, that is, at the intermediate point where the connecting operation is changed to the independent operation.
Is installed, and sends a billet detection signal 17 to the control unit 12 when the billet 12 passes.

The control unit 12 connects the billet charging position signal 18 and the walking beams 6 and 7 in the charger 3.
The operation control of the charger 3, the extractor 4, the front walking beam 6, and the rear walking beam 7 is executed by using the signals 19 and 20 related to the stroke amount during the independent operation and the steel piece detection signal 17 from the intermediate sensor 16. However, the position of the billet is tracked. 21 is a data storage unit.

Next, the operation of the apparatus configured as described above will be described. (1) Improving the tracking accuracy of the billet at the intermediate position a. Correction of the actual position by charging the steel pieces at the initial stage Now, as shown in FIG. 2, the connecting operation of both walking beams 6 and 7 or the independent operation of the front walking beam 6 is performed on the fixed beam 5 from the state of the empty furnace. When the steel pieces 2, ... Are sequentially charged and moved forward, the first steel piece 2 (2a) is detected while the intermediate sensor 16 moves to the intermediate portion. Here, when the control unit 12 receives the billet detection signal 17 from the intermediate sensor 16, the walking beams 6 and 7 are received.
Alternatively, the stop command is sent only to 6, but if it is in the middle of the repeated operation of ascending → forward → descending / restoring, the connection or independent operation is continued until this series of operations is completed. In other words, the steel piece 2a slightly flows to the extraction side even though the control unit 12 has issued the stop command.

Therefore, in consideration of the flow of the billet, the initial position of each billet is obtained as follows. First, the billet charging position signal 18 from the charger 3 is set as an initial value and stored in the data storage unit 21. Thereafter, the stroke amount signals (pulse signals) 19 and 20 of the front walking beam 6 are received for each of the operations of ascending → forward → lowering / restoring which are repeated every time, and the positions are sequentially updated. When the intermediate sensor 16 detects the steel piece 2a, the flow amount 22 of each steel piece 2 thereafter
After obtaining, the correction amount ΔLs is added to the previously updated steel bill position (dotted line D in the figure) to obtain the current updated position of each steel bill 2 (2a). This correction amount ΔLs is (absolute position of intermediate sensor 16 + flow amount 22) for the steel slab 2a. Here, the flow amount 22 is a stroke amount until the walking beam 6 enters the descending operation after the intermediate sensor 16 detects the steel piece 2a and the steel piece 2a is placed on the fixed beam 5. The subsequent steel pieces 2, ... Execute position correction calculation sequentially according to this correction amount, and correct the position of each steel piece stored in the data storage unit 21.

For example, assuming that the correction amount of the steel slab 2a is ΔLS, the position correction amount ΔLi of each succeeding steel slab 2 (i) is calculated by the intermediate sensor 16 as shown in the following equation (1).
It is assigned in inverse proportion to the distance to.

ΔLi = ΔLS (Li / LC) where Li: distance from the charging end of the subsequent steel piece 2 (i), L
C: Distance from the charging end of the steel piece 2a.

As a result, the initial position of the billet can be adjusted to the actual position. Then, from the state of the empty furnace to the first sensor detection of the steel billet, the front walking beam 6
When the steel billet is conveyed by performing the independent operation according to (3), the steel billet transferred from the front walking beam 6 to the rear walking beam is conveyed to the extraction end side by switching to the connecting operation here.

B. Regarding the number of passing steel pieces of the intermediate sensor After the initial position of the steel piece is determined as described above, the steel pieces 2, ... Are moved by the connecting operation of both walking beams 6,7. The steel slab detection signal 17 from the intermediate sensor 16 is counted, and the steel slab detection counter 21a in the data storage unit 21 is displayed as shown in FIG.
The number of steel pieces that have passed through the intermediate sensor 16 on tracking and the number of steel pieces in the furnace before passing are matched to actual conditions. That is, the billet charging position signal 1 from the charger 3
It is possible to specify the steel piece under the intermediate sensor 16 based on the steel piece charging position signal by 8 or another sensor and the number of steel piece passages by the intermediate sensor 16, and thus the steel piece transferred to the rear walking beam 7 can be specified.

However, as shown in the bottom of FIG. 3, the interval between the steel pieces is narrow, and the intermediate sensor 16 is not suitable because of problems such as how to place the steel pieces.
May not be able to detect the break in the billet. in this case,
As shown in the middle of FIG. 3, the walking beam stroke amount from the steel piece detection ON to the steel piece detection OFF by the intermediate sensor 16 is integrated, and the integrated value and the data storage unit 2 are stored in advance.
1 is compared with the billet width (see FIG. 12) or the length, and when the stroke amount integrated value exceeds the billet width or length, the count value of the billet detection counter 21a is incremented by +1 and the intermediate value is calculated. A backup process is performed on the counter for the number of billets that have passed through the sensor 16. In other words, the steel piece detection counter 21a includes the steel piece d in addition to "3" of the steel pieces a, b, and c.
The minute correction value is incremented by +1 to become the "4" count value. This can greatly improve the tracking accuracy of the billet.

C. Stopping the backup process of the counter 21a Next, at the same time as the backup process of the counter as described above, the intermediate sensor 16 is activated every time the walking beam 6 is moved upward, forward, and downward / restored as shown in FIG. The stroke amount 23 from the time when the last steel piece is detected to the completion of the operation is obtained, and the position of the steel piece under the intermediate sensor 16 is corrected based on this stroke amount 23 and the absolute position of the intermediate sensor 16. This correction principle is the same as that described in the item (a). In this case, the steel piece under the intermediate sensor 16 can be uniquely specified by the counting processing of the number of passing steel pieces described in the item (b).

However, from the detection of the billet, it goes up → forward → downward.
If the stroke amount until completion of the recovery operation is too different from the width value of the target billet, it is considered that the intermediate sensor 16 could not detect the break of the front and rear billets as described in (b) above. , Stop the correction amount this time. When the position of the steel slab is corrected, the position of the subsequent steel slab is also adjusted in accordance with the amount of the position correction described above. ΔLi = ΔLS · (Li / L
Correct based on C).

Therefore, (a) to (c) as described above
By performing the process of step 1, it becomes possible to accurately track the position of the steel slab in the central part of the heating furnace.
It is possible to reliably grasp the timing of switching from the linked operation to the independent operation.

The above description is based on the premise that the connection operation is switched to the single operation. However, even when the timing of switching from the single operation to the connection operation depends on the position of the steel piece, the steel at the intermediate position as described above is used. The technique for improving the tracking accuracy of one piece can be used as it is, and smooth and highly accurate switching can be performed. (2) Recognition of division of two groups in the middle part a. Judgment of Switching Timing by Setting Steel Sheet Intervals FIGS. 5 and 6 are diagrams for explaining an example of determination of switching timing when the steel piece interval is arbitrarily set. As shown in FIG. 5, when the rearmost steel piece 2A of the joining and rolling group (leading group) 31 made of a plurality of steel pieces passes through the central sensor 16, the connecting operation of the walking beams 6 and 7 causes the rear walking beam 7 to move. Often you want to switch to the independent operation. For that purpose, the interval between the last steel piece 2A of the first group 31 and the first steel piece 2B of the next succeeding group 32 is set to be wider than twice the maximum stroke amount of the walking beams 6 and 7. With this setting, the maximum stroke amounts of the walking beams 6 and 7 are known in advance at the design stage. Therefore, when charging the steel pieces from the charger 3 to the furnace, the distance between the steel pieces 2A and the steel pieces 2B is set to the maximum stroke amount. Set to open at least twice.

Then, in the control section 12, the steel piece 2A
Reaches the vicinity of the intermediate sensor 16 on the tracking information and monitors the steel piece detection signal 17 from the intermediate sensor 16. When the following conditions are satisfied, it is determined that the steel piece 2A has moved to the transportable position of the rear walking beam 7. , Switch from linked operation to independent operation. As shown in FIG. 6, the condition is that the intermediate sensor 16 does not detect the steel slabs 2A and 2B at the time of * (N-1) th walking beam transport completion (upper part in the same figure a).

* At the completion of the Nth walking beam transfer (lower part in the figure a), the intermediate sensor 16 is set to the steel pieces 2A, 2B.
Is not detected. * The intermediate sensor 16 should not detect the steel slabs 2A and 2B even once during the (N-1) -th to N-th transport.

That is, in the control unit 12, when the above conditions (FIG. 6a) are satisfied, specifically, the steel slab 2A is transported by the walking beam once (Nth time) immediately after the steel slab 2A passes through the intermediate sensor 16. This is an example in which, when 2B is not detected, it is determined that it is the switching timing of the walking beam, and the connection operation is switched to the independent operation.

On the other hand, the example of FIG.
After detecting the passage of the charging side end of the steel slab 2A (upper stage), the N-1th walking beam transport (middle stage),
This is an example in which when the steel piece 2B is not detected in spite of the Nth walking beam conveyance (lower stage), it is determined that it is the switching timing of the walking beam, and the coupling operation is switched to the independent operation. The example of FIG. 6B is an example in which the distance between the steel pieces 2A and the steel pieces 2B is twice or more the maximum stroke amount in consideration of the fact that each walking beam transport moves only the maximum stroke amount. .

In FIG. 6, L _AB is the distance between the steel pieces 2A and 2B (≧ LsMAX × 2), L _N is the Nth conveyance stroke amount (<LsMAX), and LsMAX is the MAX stroke amount.

Further, as an application of the above embodiment, by predicting the steel piece on the extraction end side when the steel piece 2A passes through the intermediate sensor 16 at the time of charging, the above-mentioned position and width of the steel piece are used to predict Walking beam between N-1 and N times 6,
It is also possible to predict the stroke amount of No. 7 and determine the steel bill spacing.

B. When the billet group 31 is a material to be batch-rolled as shown in FIG. 5, as shown in FIG. 7, (N-1)
Intermediate sensor 1 at the completion of the second walking beam transfer
When 6 does not detect the steel slab 2A, the target stroke amount LNmm is not transported at the next walking beam transport timing, but first, it is transported by ΔLcmm which is not less than the normal steel slab spacing, and (2) a) It is determined whether or not the condition described in step 1 is satisfied. In the case of batch transportation, since the extraction time interval is comparatively long, it can be transported by a ΔLc (mm) walking beam for the purpose of confirming the passage of the steel slab 2A as described above.

Incidentally, FIG. 7 (a) shows the switching timing when the steel piece is not detected despite the first ΔLcmm walking beam conveyance (Nth time) immediately after the steel piece 2A passed through the intermediate sensor 16. 7 (b) is an example of determining that, after detecting the charging side end of the steel piece 2A,
Two walking beam transports, ie N-1 and N
This is an example in which it is determined that it is the switching timing when the subsequent steel slab is not detected despite the second walking beam transport.

In the example of FIG. 7B, considering that the walking beam is moved by the maximum stroke amount in the (N-1) th walking beam transfer and Lcmm is transferred in the next Nth time, the steel slab 2A and the steel 2A are conveyed. The distance from the piece 2B is the maximum stroke amount +
The distance must be ΔLcmm or more, but the interval can be reduced as compared with the item (2) a.

In FIG. 7, LAB ≧ LsMAX + ΔL
c, LN = .DELTA.Lc, LN-1 <LsMAX. After such a judgment, the remaining amount (the target stroke amount LNmm-
(Lcmm) Continue moving the walking beam. When charging the billet 2B, predict the billet near the extraction end when the billet 2A is near the intermediate sensor 16, and if they belong to the joining rolling group, the extraction pitch is short,
Since the extraction must be prioritized, the technique related to the item (2) a is adopted. Otherwise, that is, when the material to be batch-rolled has a time margin of two cycles of the walking beam in the extraction pitch, the technique related to the item (2) b is adopted. (3) About installation of steel slab detection sensor In the above embodiment, the intermediate sensor 16 is installed in the intermediate portion of the heating furnace 1. For example, as shown in FIG. 8, steel slab detection is performed before and after the intermediate sensor 16. Sensor 41,4
2 is installed, and the interval LD between the intermediate sensor 16 and each steel bill detection sensor 41, 42 is set shorter than the minimum steel bill width. On the other hand, the gap between the steel slab 2A and the steel slab 2B is set wider than the maximum stroke amount when the steel slab 2B is charged.
Then, under the condition that "two or three adjacent sensors do not detect a steel slab", it is considered that the last steel slab 2A of the group 31 has passed the intermediate sensor 16, and it is determined that it is the switching timing of the walking beam. To do.

In FIG. 8, (b) to (e) show a state where such conditions are satisfied. Since the distance between the steel slab 2A and the steel slab 2B was set to the maximum stroke amount or more, 1
This is to prevent the state shown in FIG. 9A from transitioning to the state shown in FIG. Also, because the sensor interval is less than the minimum width of the billet,
This is to avoid that the above condition is not satisfied in the state of FIG. The present invention can be variously modified and implemented without departing from the scope of the invention.

[0048]

As described above, according to the present invention, the following various effects are exhibited. In the invention of claim 1, when the material to be conveyed is first charged into the furnace, the flow amount and the position of the sensor that move until the walking beam is completely stopped after the control of the walking beam conveyance is used. First, the position of the conveyed material is corrected, and this position correction amount is further allocated according to the update position (distance) of each succeeding conveyed material, so the initial position of the conveyed material can be accurately grasped, Appropriate switching timing can be obtained.

According to the second aspect of the present invention, when the walking beam is conveyed after the initial position of the conveyed material is determined, the number of detections of the conveyed material is counted from the output of the sensor at the interference portion, and the conveyed material is transferred to the rear walking beam. When the front and rear materials to be conveyed are connected, the count is backed up by judging from the predetermined stroke amount and the width or length of the material to be conveyed, improving the accuracy of tracking of the material to be conveyed. Further, according to the invention of claim 3, after the sensor at the interfering portion detects the last transported material of the leading group, the next group of It recognizes the distinction from the succeeding group, and judges that the leading group has finished moving to the rear walking beam, so it is appropriate to switch between connecting motion and independent motion. It can be carried out in.

Further, according to the invention of claim 4, the sensors are arranged in front of and behind the intermediate sensor at a predetermined interval with the intermediate sensor sandwiched therebetween. Since the division from the succeeding group is recognized and it is determined that the leading group has finished moving to the rear-side walking beam, it is possible to appropriately switch the connecting operation and the independent operation in the same manner.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a walking beam control device according to the present invention.

FIG. 2 is a diagram for explaining the alignment of the steel pieces at the initial stage,

FIG. 3 is a diagram illustrating a counting process of billets that have passed through an intermediate sensor.

FIG. 4 is a diagram for explaining the position correction of the steel slab in the central portion of the heating furnace.

FIG. 5 is a diagram showing a relationship between a leading group and a succeeding group with an intermediate sensor interposed therebetween.

FIG. 6 is an explanatory diagram of widening the interval between the first group and the subsequent group to determine passage by a unit of an intermediate sensor.

FIG. 7 is an explanatory diagram for similarly determining the passage of each group by the intermediate sensor by widening the interval between the first group and the subsequent group.

FIG. 8 is an explanatory diagram for determining the passage of the last steel piece in the first group by installing a plurality of sensors.

FIG. 9 is a diagram for explaining the operation of a conventional general walking beam.

FIG. 10 is a diagram showing a relationship between a walking beam and a steel slab.

[Explanation of symbols]

1 ... Furnace, 2 ... Steel billet, 2A ... Leading steel strip at the end of the group,
2B ... Leading steel billet of subsequent group, 5 ... Fixed beam, 6 ...
Front walking beam, 7 ... rear walking beam, 12 ... control part, 13 ... interference part, 16 ... intermediate sensor, 21 ... data storage part, 21a ... billet detection counter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyuki Oishi 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Inside the Chiba Steel Works, Kawasaki Steel Co., Ltd. (72) Kunio Yoshida 1 Kawasaki-cho, Chuo-ku, Chiba-shi Kawasaki Steel Works Co., Ltd. in Chiba Steel Works (72) Inventor Naoaki Shimada 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Works Co., Ltd. in Chiba Works (72) Inventor Yoshiho Okiya, Toshiba Town, Fuchu-shi, Tokyo Toshiba Fuchu Plant (72) Inventor Toshiyuki Yamazaki 1st Toshiba Town, Fuchu City, Tokyo Inside the Fuchu Plant, Toshiba Corporation

Claims (4)

[Claims] 1. A walking beam control device in which a front walking beam and a rear walking beam are arranged with an interfering portion in a furnace, and which conveys and controls a material to be conveyed in the furnace while performing a connecting operation or an independent operation of these both walking beams. In the above, a sensor for detecting a material to be conveyed which passes through the interference portion by the independent operation of the front walking beam or the connecting operation of both walking beams, and one cycle of the independent operation of the walking beam or the connecting operation of both walking beams is completed. The position of each material to be transported is sequentially updated using the stroke amount of the walking beam transportation for each time, and the sensor detects the passage of the first material to be loaded into the furnace from the empty state of the furnace. When controlling to stop the single operation or the connecting operation And a position of the sensor to be used to correct the position of the first material to be conveyed by using the step and the flow amount of the walking beam that is moved until the walking beam is completely stopped after the control of the control of the walking beam conveyance by the control means. An initial position correction means for allocating this position correction amount according to the update position (distance) of each subsequent conveyed material, and grasping the conveyed material existing in the interference portion and its position. A characteristic walking beam control device. 2. A walking beam control device for arranging a front walking beam and a rear walking beam with an interference portion in a furnace, and controlling the transfer of a material to be transferred in the furnace while performing a connecting operation or an independent operation of these both walking beams. In the above, a sensor for detecting a conveyed material passing through the interference part by the independent operation of the front walking beam or a connecting operation of both walking beams, and a first conveyed material charged into the furnace from an empty state of the furnace. Is detected by the sensor to determine the initial position of each material to be conveyed, and after the initial position is determined by the initial position determining means, the walking beam is conveyed by the connecting operation of both walking beams or the independent operation of the rear-side walking beam. At this time, the number of detections of the conveyed material is And the conveyed material specifying means for specifying the conveyed material transferred to the rear walking beam, and the width or length of the conveyed material whose stroke amount from the conveyed material detection ON to the detection OFF by the sensor is predetermined. A walking beam control device, comprising: a count backup means for incrementing the count value by +1 when the number exceeds the limit value, and grasping the carrier material existing in the interference portion. 3. A front walking beam and a rear walking beam are disposed in a furnace with an interference portion, and the rear walking beam is transferred to each groove unit of a plurality of materials to be conveyed placed on the front walking beam. In the walking beam control device for transporting, a sensor for detecting a transported material that passes through the interference portion, a distance between the transported material at the end of the leading group and the transported material at the beginning of the next succeeding group, at least the Interval setting means for setting the maximum stroke amount of the walking beam or more, and after the sensor detects the last transported material of the first group, the non-detected state of the transported material by the sensor is checked based on the set interval. While recognizing the division between the leading group and the next succeeding group, the leading group is Judging that it has moved to the walking beam,
A walking beam control device comprising: walking beam drive control means for performing at least a rearward walking beam operation. 4. A front walking beam and a rear walking beam are arranged in a furnace with an interference portion, and the rear walking beam is transferred to each groove unit of a plurality of conveyed materials placed on the front walking beam. In a walking beam control device for transporting, an intermediate sensor for detecting a transported material passing through the interference portion, and at least one or more disposed before and after the intermediate sensor with an interval smaller than a width or a length of the transported material. Front and rear sensors, interval setting means for setting the last conveyed material of the first group and the first conveyed material of the next succeeding group at an interval larger than the maximum stroke amount of the walking beam, and the adjacent 2 When the two sensors do not detect the transported material, the leading group is placed before and after the intermediate sensor. A walking beam drive control means for recognizing the division between the first walking group and the next succeeding group, deciding that the leading group has finished moving to the rear walking beam, and executing at least the movement of the rear walking beam. A walking beam control device characterized in that