JPH10235417A - Method for automatically collecting rolling work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically total rolling time or the like every material to be rolled and every rolling pass and to improve the working rate of a rolling mill by automatically judging that the rolling work of the material to be rolled is started using a working result collecting device by the logical product of the advancing signal, clamping signal and threading signal of the material to be rolled when the acting conditions of those signals are respectively held. SOLUTION: When adjusting work is completed, rolling speed is accelerated by an operator for executing regular rolling and held at a prescribed rolling speed. Even when the regular rolling is started, the rolling speed (a), signal of tension (b) which acts on the material 4 to be rolled and reducing pressure signal (c) are inputted every two seconds into the working result collecting device 14 and, because the rolling speed is larger than gentle running and reaches the prescribed rolling speed, it is judged that the rolling mill is in rolling from the logical product of those signals with the working result collecting device 14. Like this, the control signal of the rolling mill and data of measurement are directly fetched into the working result collecting device 14, so the operator is free from the burden for inputting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically and accurately collecting the operation rate of a rolling mill for rolling a sheet material or the like, which automatically determines the start and end of the rolling operation and the number of rolling passes for each material to be rolled. There is a way to do that.

[0002]

2. Description of the Related Art Conventionally, various methods have been adopted as methods for grasping the operating state of equipment. For example, there is a method in which an operator directly inputs an operation or stop state to an operation result collection device including a personal computer or a microcomputer from an input terminal device. However, in this method, a time error is likely to occur due to, for example, inputting work results within a predetermined work time at the end of the work. Further, if it is attempted to input these results for each material to be rolled, the burden on the operator is large. Therefore, although the method of acquiring the operation signal of the equipment into the performance collection device and obtaining the operation status and the total time value of the entire work has already been put into practical use, the operation status of each material to be rolled, which is the object of the present invention, is considered. For accurate acquisition, the suitability of the selected control signals and the logic for determining these data are important. In addition, since the rolling mill is an extremely expensive device and operates under a complicated control method, it is important to realize the above-described functions without directly affecting the control system of the rolling mill body. Becomes

[0003]

DISCLOSURE OF THE INVENTION The present invention is effective for improving the operation rate of a rolling mill in a rolling operation of a rolling mill by automatically totaling rolling time values and the like for each material to be rolled and for each rolling pass. To provide important data.

[0004]

SUMMARY OF THE INVENTION According to the present invention, the operation of the rolling mill is performed by inputting various control and measurement data from a control device of the rolling mill for rolling the plate material to the operation result collecting device at predetermined time intervals. In the method of automatically collecting the situation, among the various control and measurement data, a signal indicating that the coil car loaded with the material to be rolled is directed toward the payoff reel, a signal for gripping the material to be rolled to the payoff reel, and a signal of the payoff reel. When the conditions under which the passing signal detected by rotation acts are satisfied, the operation result collecting apparatus automatically determines that the rolling operation of the material to be rolled has been started by the logical product of the signals. This is a feature of the automatic rolling collection method. Further, according to the present invention, the passing signal detected by the rotation of the payoff reel, the level signal in the rolling direction of the material to be rolled, and the clamp signal of the reel which has finished winding the material to be rolled to the rear end portion act from open to close. Then, the operation result collection device automatically determines the end of the rolling operation of the material to be rolled based on a logical product of those signals, and is an automatic rolling collection method. Further, in the present invention, the rolling speed a is equal to or higher than a predetermined value, a tension signal b acting on the material to be rolled on the winding side acts, and a rolling pressure c on the material to be rolled on the rolling roll acts. By the logical product of the signals at the time, it is determined that rolling is in progress, and in addition to those signals, a pass-through signal detected by the rotation of the pay-off reel, and the direction from the unwinding side to the feeding side is a forward direction,
An automatic collection method of a rolling operation, wherein the classification of each rolling pass during the rolling operation is automatically determined based on the logical product of the level signals in the rolling direction with the opposite being the reverse direction.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments. FIG. 1 shows an example of a system configuration diagram for implementing the present invention. In FIG. 1, 1 is a work roll of a rolling mill, 2 is an intermediate roll, 3 is a backup roll. Reference numeral 15 denotes a payoff reel 15 for initially mounting the workpiece 4 on a rolling mill. Reference numeral 5 denotes a load cell, which is a sensor for measuring the rolling pressure for rolling the material 4 to be rolled by the hydraulic rolling cylinder 6 or the hydraulic jack 6. Reference numeral 7 denotes a tension reel on the feed side on which the coil as the material to be rolled 4 is mounted, and reference numeral 8 denotes a tension reel on the winding side. Reference numeral 9 denotes a tension roll that applies tension to the material 4 so that the material 4 can be normally rolled when the material 4 is rolled. A sensor 10 such as a load cell for detecting the tension acting on the material to be rolled 4 is embedded in the tension roll 9. 11 is a mill motor for rotating the intermediate roll 2 which is a driving roll,
Rotational force is applied to the intermediate roll 2 via the pinion stand 12. In the rolling, the leading end of the material 4 to be rolled is unwound from the payoff reel 15, passes through the three roll feeder 16, passes between the work rolls 1, and is taken up by the take-up reel 8.
The tip is clamped at and the preparation for the rolling operation is completed. The rolling of the first pass of the rolling operation is performed between the pay-off reel 15 and the take-up tension reel 8, and before the start of the second pass of rolling, the rear end of the material to be rolled is fed to the tension tension reel. 7 and the subsequent rolling operation is performed. A control device 13 controls the operation of each device of the rolling mill, and includes a sequencer and the like. FIG. 1 shows only signal lines for the control device 13 to control the driving of the mill motor 11. The measurement data of the load cells 5 and 10 are also input to the control device 13. Reference numeral 14 denotes an operation result collection device including a personal computer. The operation result collection device 14 transmits data of various rolling control signals from the control device 13 to the rolling mill and measurement data from the sensor at predetermined time intervals, for example, two times.
The data is captured every second and stored in a storage device in chronological order. The rolling speed a of the material to be rolled 4 is calculated by the control device 13 from the number of rotations of the intermediate roll 2 as a driving roll. Although not shown in FIG. 1, the rolling direction of the material 4 to be rolled is such that the direction from the payoff reel 15 or the delivery tension reel 7 to the take-up tension reel 8 is a forward direction, and the opposite direction is a reverse direction. Is input to the control device 13 and stored.

Next, the operation of the present invention will be described. First, the operator of the rolling mill inputs the product name of the material 4 to be rolled from now on using a terminal (a barcode reader or a keyboard).
The data is input to the operation result collection device 14 using the above. Subsequently, the worker mounts the rolled material 4 on the payoff reel 15 by using a coil car (not shown). Next, the leading end of the material 4 to be rolled is guided by a three-roll feeder 16, clamped between the work rolls 1 by the tension reel 8 on the take-up side, and the pay-off reel 15 is slightly rotated in a direction opposite to the unwinding direction. Then, the material to be rolled 4 is tightened to give an appropriate tension to the material to be rolled 4. Then, the load cell 10 mounted on the tension roll 9 detects the tension. This work corresponds to “rolled material mounting” in the time chart shown in FIG. 3, and the start point of this work is determined to be the start of the rolling work.

Next, after the gap between the work rolls 1 is set to a predetermined value in order to roll the material to be rolled 4 to a predetermined thickness, the mill motor 11 is driven to set the rolling speed to a gradual movement. Perform trial rolling. The trial rolling means rolling the material 4 to be rolled at a rolling speed a, for example, at a speed of 20 m / min.
3 is an adjustment operation for checking whether or not the surface has any scratches, and corresponds to "adjustment" shown in FIG. In this adjustment work, as shown in FIG. 2, the rolling speed a and the pressure and tension by the load cells 5 and 10 are input to the operation result collection device 14 at time intervals of 2 seconds as shown in FIG. At this time, a change point at which the rolling speed becomes slow from the stopped state is determined to be the adjustment start. In addition, the rolling speed a is 20 m / min, the tension signal b on the winding side of the material to be rolled is in operation (ON), and the rolling pressure c of the rolling roll on the material to be rolled is in operation (ON). The operation result collection device 14 determines that the adjustment operation is being performed based on the logical product of. FIG.
As shown in the figure, the rolling speed a is the rolling speed (for example, 40 m /
Min), it is possible to clearly distinguish between rolling and adjusting.

After the adjustment operation, the operator accelerates the rolling speed in order to perform the main rolling, and a predetermined rolling speed (for example, 4
0 m / min). Even if the main rolling operation is started, the operation result collection device 14 sets the rolling speed a (40 m
/ Min), the tension signal b acting on the material to be rolled 4 and the rolling pressure signal c are input, and the rolling speed a is greater than the slow motion and has reached the predetermined rolling speed (40 m / min). From the logical product of these signals, the operation result collection device 14 determines that rolling is in progress. The rolling direction shown in FIG. 3 is such that the direction from the payoff reel 15 or the feed-side tension reel 7 to the take-up tension reel 8 is the forward direction, and the reverse direction is the reverse direction. Is being entered. The level signal of the rolling direction is set so that the direction is switched in conjunction with the rolling signal. For example, when turning between passes, the mill motor 11 reverses or adjusts the rolling direction of the immediately preceding pass. Therefore, even if conditions such as slowing down the rolling speed occur due to the above, they are excluded from the satisfaction of the condition during rolling, and an interlocking process that does not cause a change in direction is performed by the operation result collection device 14. Has been made. Next, in the level signal of FIG. 3, from the rolling signal and the rolling direction signal input in time series, the logical product of the signal during rolling and the switching point of the rolling direction is used to separate all rolling passes during the rolling operation. A distinction can be made.

When the end of the first pass is approaching, the milling speed is reduced, the mill motor is stopped, and the work of the pass is completed. At this time, the tension signal b and the rolling pressure signal c of the material to be rolled are not normally released (OFF).
In the operation result collecting device 14, the rolling speed a is lower than a predetermined rolling speed (for example, 40 m / min) or 0 m / min.
Since (stop) is input, one of the conditions for determining that rolling is being performed is not satisfied, and the end of the rolling pass can be determined.

[0010] Subsequently, when rolling is performed in the second and subsequent passes, the same rolling operation is performed with the rolling direction reversed from the rolling pass in the immediately preceding operation. When the rolling operation for the predetermined number of rolling passes is completed, the material to be rolled is removed from either the feed-side tension reel 7 or the take-up tension reel 8. At this point, the rolling operation (all passes) of the material to be rolled is usually regarded as completed. However, the rear end of the material to be rolled is cut off by several meters for quality reasons, and this is also removed from one of the above-mentioned other reels. In addition, the timing of the cutting operation is often performed one pass before the final pass, and when the time when the cut material comes off is regarded as the end of the rolling operation, the operation of the remaining final rolling pass is performed in the next independent rolling operation. Is incorrectly recognized as In order to avoid this state, the operation result collection device 14 determines the rolling direction and the classification of each pass, the number of passes, and the state in which the material to be rolled has been removed from the feed-side tension reel 7 or the take-up tension reel 8 by logical AND. , The end of the rolling operation is determined. That is, in conjunction with the rolling direction, the state in which the material to be rolled has come off from the reel on which the entire rear end of the material to be rolled has been wound is determined to be the end of the rolling operation, and the material to be fed on the side to be fed out is determined. By excluding the off state, the certainty of the conclusion of the rolling operation is guaranteed. In this manner, the operation result collection device 14 performs the rolling speed a, the tension signal b applied to the material to be rolled at the time of rolling, the rolling pressure signal c of the material 4 to be rolled, the rolling direction c at predetermined time intervals for each rolling pass. When the rolling operation of a predetermined number of passes is completed, the rolling performance collecting device 14 adjusts the collected data as shown in FIG. Then, a data table as shown in FIG. 2 is created. From this data table, the time values of the rolling and adjustment work are integrated, and the accurate rolling and adjustment work time can be calculated for each material to be rolled and for each rolling pass. In the embodiment of the present invention described above, the tension signal (b) of the material to be rolled 4 and the rolling pressure (c) of the material to be rolled which are input from the control device 13 to the operation result collecting device 14 are ON and OFF signals. However, it is also possible to input an absolute value. In the above-described embodiment of the present invention, the logical determination as to whether or not rolling is being performed based on various control signals and measurement data has been described as being performed by the operation result collection device 14, but the logical determination can also be performed by the control device 13. It is. In this case, a signal indicating whether or not rolling is being performed is transferred from the control device 13 to the operation result collection device 14.

[0011]

The present invention described above has the following effects. 1) By taking the control signal and the measurement data of the rolling mill directly into the operation result collecting device, there is no burden on the operator's input. 2) By disposing the operation result collection device outside the rolling mill body and installing it outside, more accurate rolling work time can be automatically collected in real time with a simple and inexpensive device. 3) Accurate rolling time can be collected for each material to be rolled and each rolling pass, and effective data for improving productivity of the rolling operation can be automatically collected.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention.

FIG. 2 is a diagram showing an example of operation result data collected according to the present invention;

FIG. 3 is a time chart illustrating a relationship between a work item during rolling and a rolling speed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work roll 2 Intermediate roll 3 Backup roll 4 Rolled material 5 Load cell 6 Hydraulic pressure reduction cylinder 7 Feed side tension reel 8 Take-up side tension reel 9 Tension roll 10 Load cell 11 Mill motor 12 Pinion stand 13 Rolling mill control device 14 Collecting operation results Equipment 15 Payoff reel 16 Three roll feeder

Claims (3)

[Claims] 1. A method for automatically collecting the operation status of a rolling mill by inputting various control and measurement data from a control device of a rolling mill for rolling a sheet material to an operation result collection device at predetermined time intervals, Among the various control and measurement data, 1) a forward signal for the coil car loaded with the material to be rolled toward the payoff reel side 2) a signal for gripping the material to be rolled on the payoff reel 3) a passing plate detected by the rotation of the payoff reel When the conditions of the signals are satisfied, the operation result collecting apparatus automatically determines, based on the logical product of the signals, that the rolling operation of the material to be rolled has been started. . 2. A method for automatically collecting the operation status of the rolling mill by inputting various control and measurement data from a control device of a rolling mill for rolling a sheet material to an operation result collecting device at predetermined time intervals, Among the various control and measurement data, 1) a passing signal detected by the rotation of the pay-off reel 2) a level signal in the rolling direction of the material to be rolled 3) a clamp of a reel having finished winding the material to be rolled to the rear end portion When the signals act from open to closed, the operation result collecting apparatus automatically determines the end of the rolling operation of the material to be rolled, based on the logical product of the signals, and the automatic collecting method of the rolling operation. 3. A method for automatically collecting the operation status of the rolling mill by inputting various control and measurement data from a control device of a rolling mill for rolling a sheet material to an operation result collecting device at predetermined time intervals, Among the various control and measurement data, 1) the rolling speed a is equal to or more than a predetermined value set in advance 2) the tension signal b acting on the material to be rolled on the winding side is applied 3) the rolling roll is applied to the material to be rolled It is determined that rolling is in progress by the logical product of the signals indicating that the rolling pressure c is acting. 4) A passing signal detected by the rotation of the payoff reel 5) The direction from the unwinding side to the feeding side is forward direction. A method of automatically collecting a rolling operation, wherein the classification of each rolling pass during the rolling operation is automatically determined by the logical product of the level signals in the rolling direction with the opposite being the reverse direction.