JP3999386B2 - Rolling roll slip prevention control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention prevents slip due to a difference in rotational speed between upper and lower rolling rolls in a rolling mill in which either one of the upper and lower rolls of the rolling roll is not provided with a driving device and the other roll is provided with a driving device. Thus, the present invention relates to a rolling roll slip prevention control device for controlling the rotational speed of a driving roll.
[0002]
[Prior art]
FIG. 3 is a block diagram showing a configuration of a speed reduction control device in a conventional rolling mill. FIG. 4 is a flowchart showing the procedure for adjusting the rotational speed and the reduction position of the speed reduction control device in the conventional rolling mill.
[0003]
As shown in FIG. 3, the conventional rolling mill includes an upper drive roll drive motor 117, an upper drive roll speed control device 116, a lower drive roll drive motor 103, and a lower drive roll speed control device 115. Both the lower roll 102 and the lower roll 102 were able to give a rotational force directly. Further, the rolling roll gap opening / closing device 106 was also able to adjust the rolling roll gap position regardless of the operation of adjusting the rotational speed of the rolling roll.
[0004]
Therefore, when adjusting the rolling roll rotation speed and the rolling roll gap to secure the rolling roll rotation speed and the rolling roll gap necessary for rolling, as shown in FIG. 4, the rolling roll rotation speed and the rolling roll are adjusted. The roll gap could be adjusted at the same time.
[0005]
[Problems to be solved by the invention]
However, in the rolling mill in which either one of the upper and lower rolls is not provided with a drive device and the other roll is provided with a drive device, the speed reduction control device having the above-described configuration cannot be applied. . Because one of the rolls is not provided with a driving device, in order to give a rotational force to this non-driving roll, the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device. The rotational force must be applied to the non-driven roll by the rotational force.
[0006]
When the non-driving roll and the driving roll are brought into contact with each other, if there is a difference in rotational speed between the driving roll and the non-driving roll, slip occurs between the rolls and damages the rolling roll.
[0007]
Therefore, the present invention has been made to solve the above problems, and it is possible to prevent slip between rolling rolls by matching the rotational speed record of the driving roll and the rotational speed record of the non-driving roll. An object of the present invention is to provide a rolling roll slip prevention control device.
[0008]
[Means for Solving the Problems]
The rolling roll slip prevention control device according to the first aspect of the present invention provides a driving roll when a non-driving roll and a driving roll are brought into contact with each other by a rolling roll gap opening / closing device in order to give a rotational force to the non-driving roll. An upper and lower roll speed difference correcting means for correcting the rotational speed of the drive roll so that the actual rotational speed coincides with the actual non-driven roll rotational speed is provided.
[0009]
By using the means described above, the drive roll rotation speed is synchronized with the non-drive roll rotation speed. That is, when the drive roll rotation speed record is slower than the non-drive roll rotation record, the drive roll rotation speed increases with the non-drive roll rotation record as a target. Further, when the drive roll rotation speed record is faster than the non-drive roll rotation record, the drive roll rotation speed is decelerated with the non-drive roll rotation record as a target. Therefore, it is possible to prevent a slip due to a difference in rotational speed between the driving roll and the non-driving roll.
[0010]
The rolling roll slip prevention control device according to the second aspect of the present invention provides a rolling roll when the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device in order to give a rotational force to the non-driving roll. Based on the gap position record and the non-drive roll deceleration rate record detected by the non-drive roll speed detection means, the amount by which the non-drive roll rotational speed decelerates and drops before the non-drive roll and the drive roll come into contact is predicted and calculated. Non-drive roll deceleration rate correction means for correcting the rotation speed of the drive roll so that the drive roll rotation speed record coincides with the non-drive roll rotation record when the drive roll and the drive roll come into contact with each other .
[0011]
By using the above-described means, when the non-driving roll and the driving roll are in contact, the actual driving roll rotational speed results in a time delay so as to match the non-driving roll rotational speed record. Accordingly, when the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device in order to give a rotational force to the non-driving roll, slip due to the rotational speed difference between the driving roll and the non-driving roll can be prevented. it can.
[0012]
The rolling roll slip prevention control device according to the third aspect of the present invention provides the rolling material after the roll gap is opened when the roll gap is opened in order to secure the rolling roll gap necessary for rolling. The amount by which the rotational speed of the non-driving roll decelerates and drops until it is caught in the rolling roll is corrected in advance, the rolling roll gap is opened, the correction amount is released, and the non-driving roll is released when the rolling material is caught in the rolling roll. Included non-driving roll deceleration prediction correction means for correcting the rotational speed of the driving roll so that the actual rotational speed and the actual driving roll rotational speed coincide with each other, and the biting speed during rolling is equal to the set speed. Features.
[0013]
By using the above-described means, when the rolling material bites into the rolling roll, the non-driving roll rotational speed record and the driving roll rotational speed record coincide with each other, and the biting speed at the time of rolling becomes the set speed. Act on. Therefore, it is possible to prevent a slip due to a difference in rotational speed between the driving roll and the non-driving roll when the rolled material bites into the rolling roll.
[0014]
The rolling roll slip prevention control device according to the present invention described in claim 4 is a case where the rolling roll rotational speed and the rolling roll gap are adjusted in order to secure the rolling roll rotational speed and the rolling roll gap necessary for rolling. In addition, in order to make the driving roll rotational speed record and the non-driving roll rotational speed record coincide with each other by the upper and lower roll speed difference correcting means, and to give a rotational force to the non-driving roll, the non-driving roll and the driving roll are When the non-driving roll and the driving roll are brought into contact with each other by the non-driving roll deceleration rate correcting means, the driving roll rotational speed record is matched with the non-driving roll rotational speed record so that the driving roll and the non-driving roll are in contact with each other. After that, by adjusting the drive roll rotation speed, the drive roll rotation speed and the non-drive roll rotation speed are adjusted to the pressure required for rolling. In line with the roll rotation speed setting, the non-drive roll deceleration prediction correction means preliminarily corrects the decrease in the non-drive roll rotation speed between the opening of the roll gap and the rolling material biting into the roll. Immediately before the rolling material bites into the rolling roll, the rolling roll gap is opened, the rolling roll gap position results are matched with the rolling roll gap position setting required for rolling, the rolling roll gap is opened, and then the non-driven roll A means for controlling to cancel the non-driving roll deceleration prediction correction amount corrected by the deceleration prediction correction means is provided.
[0015]
By using the above-described means, when the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device in order to give a rotational force to the non-driving roll, the rotational speed of the driving roll and the non-driving roll are equal to each other. In addition, when the rolling material bites into the rolling roll, the non-driving roll rotational speed record and the driving roll rotational speed record coincide with each other, and the biting speed during rolling acts as the set speed. Therefore, when the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device in order to give a rotational force to the non-driving roll, and between the driving roll and the non-driving roll when the rolling material bites into the rolling roll. Slip due to a difference in rotational speed can be prevented.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a rolling roll slip prevention control device according to an embodiment of the present invention. FIG. 2 is a flowchart showing an operation sequence in this embodiment.
[0017]
As shown in FIG. 1, this embodiment is intended for a rolling mill in which either one of the upper and lower rolls is not provided with a driving device and the other roll is provided with a driving device. The machine rolls the rolled material 20 with the non-driven roll 1 and the driven roll 2.
[0018]
The drive roll 2 is driven by a drive roll drive motor 3, and the speed of the rolling roll is controlled by a drive roll speed control device 15. The driving roll speed control device 15 uses the driving roll speed reference command value signal 10B as a target value, and the driving roll speed actual value signal 7A detected by the driving roll speed detection device 5 and output from the driving roll speed signal output means 7 is obtained. Control is performed to match the target value.
[0019]
In the rolling mill having such a configuration, since the non-driving roll 1 does not include a driving device, the non-driving roll is provided by a rolling roll gap opening / closing driving device 6 in order to give a rotational force to the non-driving roll 1. 1 and the driving roll 2 are brought into contact with each other, and the rotational force of the driving roll 2 must be applied to the non-driving roll 1.
[0020]
When the non-driving roll 1 and the driving roll 2 are brought into contact with each other, if there is a difference in rotational speed between the driving roll 2 and the non-driving roll 1, slip occurs between the rolls and damages the rolling roll. End up.
[0021]
Therefore, in this embodiment, the driving roll rotation speed record and the non-driving roll rotation speed record are matched to prevent slip between the rolling rolls.
In order to secure the rolling roll rotation speed and the rolling roll gap necessary for rolling, when adjusting the rolling roll rotation speed and the rolling roll gap, first, the non-driving roll speed detecting device 4 detects the non-driving roll speed. Using the non-drive roll speed actual value signal 8A output from the signal output means 8, the vertical roll speed difference correction value is adjusted by the vertical roll speed difference correction means 11 so that the drive roll rotation speed and the non-drive roll rotation speed coincide with each other. The signal 11A is output to correct the drive roll rotation speed (step S21 in FIG. 2). For example, if the non-drive roll rotation speed is V1, the drive roll speed control device 15 controls the drive roll rotation speed to be V1.
[0022]
Next, when the drive roll rotation speed and the non-drive roll rotation speed coincide with each other (time point A in FIG. 2), the rolling roll gap opening / closing drive device 6 and the non-drive roll 1 The drive roll 2 is brought into contact (step S22 in FIG. 2). At this time, the non-driven roll deceleration rate actual value signal 8B output from the non-driven roll speed signal output means 8 and the rolling roll gap position actual value signal 9A output from the rolling roll gap position signal output means 9 are used ( For example, the time required for the non-driving roll 1 and the driving roll 2 to contact each other is calculated from the rolling roll gap position results, and the calculated time and the non-driving time required for the non-driving roll 1 and the driving roll 2 to contact each other are calculated. The non-driving roll deceleration rate correction means 12 predicts and calculates the amount ΔV1 at which the non-driving roll rotational speed decelerates and drops before the non-driving roll 1 and the driving roll 2 come into contact with each other. When the 1 and the driving roll 2 come into contact with each other, the non-driving roll deceleration rate correction value signal is sent so that the driving roll rotational speed and the non-driving roll rotational speed coincide with each other without time delay Outputs 12A, correcting the drive roll rotation speed (V1-ΔV1) (step S23 in FIG. 2). Therefore, slip due to a difference in rotational speed between the driving roll 2 and the non-driving roll 1 when the non-driving roll 1 and the driving roll 2 are brought into contact with each other by the rolling roll gap opening / closing device 6 in order to give a rotational force to the non-driving roll 1. Can be prevented.
[0023]
After the non-driving roll 1 and the driving roll 2 are in contact with each other (time point B in FIG. 2), the above-described operation is terminated (step S24 in FIG. 2), By outputting the value signal 10A and adjusting the drive roll rotation speed, the drive roll rotation speed and the non-drive roll rotation speed are matched with the rolling roll rotation speed setting Vs necessary for rolling. At this time, the non-driven roll deceleration prediction correction means 13 uses the rolling material arrival expected time signal 20A obtained from the preceding and following rolling mills until the rolling material bites into the rolling roll after opening the roll gap. A non-driving roll deceleration prediction correction value signal 13A is output so as to preliminarily correct the amount ΔV2 by which the non-driving roll rotational speed decelerates and decreases, and the non-driving roll rotational speed and the driving roll rotational speed are corrected to (Vs + ΔV2) ( Step S25 in FIG. Then, immediately before the rolling material bites into the rolling roll (time point C in FIG. 2), the rolling roll gap is opened by the rolling roll gap opening / closing drive device 6, and the rolling roll gap position result is set to the rolling roll gap position required for rolling. (Step S26 in FIG. 2). After opening the rolling roll gap, the non-drive roll deceleration prediction correction value signal 13A corrected by the non-drive roll deceleration prediction correction means 13 is canceled (step S27 in FIG. 2). By doing in this way, when a rolling material bites into a rolling roll, a non-driving roll rotational speed result and a driving roll rotational speed result coincide, and the biting speed at the time of rolling becomes Vs according to the set speed. Therefore, it is possible to prevent a slip due to a difference in rotational speed between the driving roll 2 and the non-driving roll 1 when the rolling material bites into the rolling roll.
[0024]
【The invention's effect】
As is apparent from the above description, according to the present invention, by correcting the drive roll rotation speed, the non-drive hole rotation speed and the drive roll rotation speed can be matched to prevent slipping between the rolling rolls. can do.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.
FIG. 2 is a flowchart showing an operation sequence according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a conventional rolling mill speed reduction control device.
FIG. 4 is a flowchart showing an operation sequence of a conventional rolling mill speed reduction control device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Non-drive roll 2 ... Drive roll 3 ... Drive roll drive motor 4 ... Non-drive roll speed detection device 4A ... Non-drive roll speed detection signal 5 ... Drive roll speed detection device 5A ... Drive roll speed detection signal 6 ... Roll roll gap Opening and closing drive device 6A ... Roll roll gap position detection signal 7 ... Drive roll speed signal output means 7A ... Drive roll speed actual value signal 8 ... Non-drive roll speed signal output means 8A ... Non-drive roll speed actual value signal 8B ... Non-drive roll Deceleration rate actual value signal 9 ... Rolling roll gap position signal output means 9A ... Rolling roll gap position actual value signal 10 ... Driving roll speed reference command setting means 10A ... Driving roll speed reference command setting value signal 10B ... Driving roll speed reference command value Signal 11: Up / down roll speed difference correction means 11A ... Up / down roll speed difference correction value signal 12 ... Non-driven roll reduction Rate correction means 12A ... Non-drive roll deceleration rate correction value signal 13 ... Non-drive roll deceleration prediction correction means 13A ... Non-drive roll deceleration prediction correction value signal 14 ... Drive roll speed reference correction value addition means 15 ... Drive roll speed control device 20 ... Rolled material 20A ... Rolled material arrival time signal 101 ... Upper drive roll 102 ... Lower drive roll 103 ... Lower drive roll drive motor 104 ... Upper drive roll speed detection device 104A ... Upper drive roll speed detection signal 105 ... Lower drive roll speed Detection device 105A ... Lower drive roll speed detection signal 106 ... Roll roll gap opening / closing drive device 107 ... Lower drive roll speed signal output means 107A ... Lower drive roll speed actual value signal 108 ... Upper drive roll speed signal output means 108A ... Upper drive roll Speed actual value signal 110... Driving roll speed reference command setting means 110 A. Le speed reference command setpoint signal 115 ... lower drive roll speed control device 115A ... lower drive roll drive current signal 116 ... upper drive roll speed control device 116A ... upper drive roll drive current signal 117 ... upper drive roll drive motor 120 ... rolling material

Claims (4)

In order to give a rotational force to the non-driving roll, when the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device, the driving roll rotational speed record coincides with the non-driving roll rotational speed record. A rolling roll slip prevention control device comprising an upper and lower roll speed difference correcting means for correcting a rotation speed. When the non-driving roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device in order to give a rotational force to the non-driving roll, the non-driving roll detected by the non-driving roll speed detecting means when the non-driving roll and the driving roll are brought into contact with each other. Based on the deceleration rate results, the amount by which the non-driving roll rotational speed decelerates and drops before the non-driving roll and the driving roll come into contact with each other is predicted. A rolling roll slip prevention control device comprising a non-drive roll deceleration rate correction means for correcting the rotation speed of the drive roll so as to coincide with the roll rotation speed record. When opening the roll gap to ensure the necessary rolling roll gap for rolling, the rotational speed of the non-driven roll is decelerated and lowered between the opening of the roll gap and the rolling material biting into the rolling roll. After correcting the minute and releasing the rolling roll gap, the correction amount is released, and when the rolled material bites into the rolling roll, the non-driving roll rotational speed record matches the driving roll rotational speed record, and the biting during rolling A rolling roll slip prevention control device comprising non-driving roll deceleration prediction correction means for correcting the rotational speed of the driving roll so that the setting speed is equal to the set speed. When adjusting the rolling roll rotation speed and the rolling roll gap in order to secure the rolling roll rotation speed and rolling roll gap necessary for rolling, the driving roll rotation speed results and non-driving are adjusted by the upper and lower roll speed difference correction means. When the non-driven roll and the driving roll are brought into contact with each other by the rolling roll gap opening / closing device, the non-driving roll deceleration rate correcting means is used to bring the non-driving roll into contact with the non-driving roll in order to match the roll rotational speed results and to give the non-driving roll rotational force. When the drive roll comes into contact with the drive roll, the drive roll rotation speed record is matched with the non-drive roll rotation record, and the drive roll rotation speed is adjusted after the drive roll and non-drive roll come into contact with each other. Match the non-driven roll rotation speed to the rolling roll rotation speed setting required for rolling and predict the non-driven roll deceleration Correcting the amount by which the rotational speed of the non-driven roll is decelerated and lowered between the opening of the roll gap and the rolling material biting into the rolling roll by the correct means, immediately before the rolling material bites into the rolling roll. Non-driven roll deceleration prediction correction amount corrected by non-driven roll deceleration prediction correction means after opening the roll gap, matching the rolling roll gap position results with the rolling roll gap position setting required for rolling, opening the rolling roll gap A rolling roll slip prevention control device, characterized by comprising means for controlling to cancel.

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