JP7364361B2 - Winder device operation control method - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Published in 86th Paper and Pulp Research Presentation Abstracts (Published on June 14, 2019) Paper No. 11

The present invention relates to a winder device that rewinds a roll of paper manufactured by a paper machine into a roll of narrow width and diameter.

In a paper machine, in order to efficiently manufacture paper, paper is manufactured as a paper sheet, and the paper sheet is wound onto a machine reel to complete the roll. This roll has a large diameter due to the long winding length, and also has a large width, and in this rolled state, it can be used by users, such as being supplied to printing machines at newspaper companies and printing factories. Can not do it. For this reason, paper mills use the manufactured roll as a parent roll, reduce the length of the roll to make it smaller in diameter, reprocess it into a child roll with a narrow width suitable for use in printing machines, etc., and then ship the product. ing.

2. Description of the Related Art There is a winder device as a device for reprocessing a parent winding, which is a winding manufactured by winding a paper sheet by a paper machine, into a child winding. In the winder device, a parent paper sheet that is unwound and traveling from a parent winder supported by an unwinder is passed through a slitter knife and cut into small widths to form daughter paper sheets. Then, this narrow child paper sheet is wound to a desired length onto a paper tube supported by a front drum and a rear drum to form a child winding.

By the way, in a winder device, for example, as described in Patent Document 1, it is said that a peak of vibration occurs within the same region of the winding rotational speed. When vibrations of peak intensity occur in the winder device, there is a risk that, for example, eccentricity may occur in the child winding or paper breakage may occur. For this reason, the speed of the winder device is controlled so that the winder device does not vibrate strongly.
In this Patent Document 1, in order to eliminate or minimize the influence of the vibration region, the traveling speed of a paper web winder is controlled based on the rotational speed of the winding machine, and the rotational speed of the winding machine is controlled based on the rotational speed of the winding machine. When approaching the area where vibrations occur, the running speed is quickly reduced so that the rotational speed of the winder is reduced to a level lower than the lowest rotational speed of the vibration area, and after this, the original winder is A paper web winding method has been proposed in which the running speed of the winder is increased while the rotational speed of the roll is held constant until the running speed of .

In addition, Patent Document 2 discloses that in order to adjust the winding speed according to the increase in the winding diameter so as not to cause resonance, and to shorten the winding time, the drum rotation speed is adjusted to the specific speed of the support frame of the winding machine. A winding machine rotation speed control device has been proposed that attempts to maintain the rotation speed below an upper limit determined from the vibration frequency, winding roll diameter, and drum diameter.

In addition, Patent Document 3 states that in order to suppress the influence of resonance vibration inherent to the device to a low level and enable safe and highly efficient operation without paper breaks, the amount of material taken up by the winder is adjusted to reduce the resonance vibration of the machine. A take-up amount determining means for determining whether the upper limit of the range has been exceeded; a first acceleration rate having a value larger than the allowable acceleration range; and a second acceleration rate having a smaller value than the first acceleration rate. is memorized and increases at a second acceleration rate from the start of winding until it is determined by the winding amount determining means that the upper limit of the resonance vibration range has been exceeded, and then steady winding is started after it is determined that the upper limit of the resonance vibration range has been exceeded. A speed control device for a winder has been proposed, comprising: acceleration/deceleration rate control means for generating a speed reference that increases at a first acceleration rate until a maximum speed is reached.

Furthermore, in Patent Document 4, in order to detect abnormal vibrations of the winder and prevent mechanical accidents, a vibration detection sensor is attached to the winding side, and the signal of the sensor is transmitted via a vibration meter. A reference vibration value that is input to an alarm setting device and is stored and set in advance in the alarm setting device and the input value of the vibration is calculated by a calculator, and the input signal value is stored and set in advance. When the value exceeds the value, the difference signal is output to the speed controller, and the speed controller outputs a deceleration command signal corresponding to the difference signal to the drum roll to adjust the winder speed. A control method has been proposed.

Furthermore, Patent Document 5 discloses that various parts of a web winding device are designed to eliminate vibrations in each part that are problematic in terms of winder performance, which are caused by the relationship between the rotational speed of the unwinding roll and take-up roll and the natural frequency of each part of the winder. A vibration amplitude detection device installed in A web winding device has been proposed which includes a control device for controlling the web winding device.

Japanese Patent Application Publication No. 10-139241 Specification of Utility Model Application No. 1-65250 Japanese Patent Application Publication No. 2001-31306 Japanese Patent Application Publication No. 6-80289 Japanese Unexamined Patent Publication No. 63-267650

The paper web winding method disclosed in Patent Document 1 reduces the rotational speed of the roll when the rotational speed of the roll approaches a region where strong vibrations occur. That is, the roll rotation speed range in which strong vibrations occur is measured and set in advance, and compared with this set range.
Further, the winding machine rotation speed control device disclosed in Patent Document 2 sets the rotation speed of the winding drum, which is determined from the natural frequency of the winding support frame, the drum diameter, and the winding roll diameter, to a preset upper limit. The number of rotations of the winding drum is controlled so that the number of rotations is equal to or less than the number of rotations.
Further, the speed control device for a winder disclosed in Patent Document 3 has different acceleration rates before and after a resonance vibration range specific to the winder device.
Further, the winder vibration control method disclosed in Patent Document 4 slows down the winder when abnormal vibration is detected.
The web winding device disclosed in Patent Document 5 controls the winding speed based on the detected value by a vibration amplitude detection device installed in each part of the web winding device.
As disclosed in these patent documents, in order to prevent the winder from generating strong vibrations, processing by the winder is slowed down or accelerated in areas where strong vibrations are generated. , the measurement targets for detecting regions that generate strong vibrations are different.

The inventor discovered that one of the causes of the strong vibrations occurring in the winder device is resonance of periodic components derived from the natural frequency of winding.
Therefore, this invention prevents the eccentricity of the winding by reducing the winding speed within the vibration range due to resonance caused by the natural frequency of the winding, and enables highly efficient operation without paper breaks. The purpose is to provide winder speed control.

As a technical means for achieving the above object, the present invention provides a method for controlling the operation of a winder device, in which a winder device that forms a small width and small diameter child winding from a winding of paper is provided. The resonance range includes one or more of the resonance time, the resonance winding diameter of the child winding, and the resonance winding length, which is a resonance range in which a plurality of periodic components including the natural frequency resonate and vibration increases. It is characterized in that the processing speed of the winder device is lowered when the winder is moved out of the resonance range, and is increased when the winder moves out of the resonance range.

Note that the resonance time is the operating time of the winder device in the resonance range, the resonance winding diameter is the range of the diameter of the child winding in the resonance range, and the resonance winding length is the winding length of the child winding in the resonance range.
That is, for example, during operation of the winder device, a plurality of periodic components including the natural frequency of the child winding, such as the natural frequency of the child winding, the rotation frequency of the child winding, and the rotation frequency of the drum of the winder device, are generated. If the resonance time, resonance winding diameter, or resonance winding length enters the resonance range, or if two or more overlap, the processing speed of the winder device is reduced and the vibration is reduced. It is designed to reduce the amount as much as possible.
Note that the rotational frequency of the child winding refers to a periodic component of vibration that occurs once for each rotation of the child winding.

Another aspect of the present invention is a method for controlling the operation of the winder device described above, in which, after acquiring vibration data by a vibration sensor installed at an appropriate position in the winder device, frequency analysis is immediately performed to control the operation of the child winder. The resonance range can be determined by confirming the resonance points of a plurality of periodic components including the natural frequency of .

Vibration sensors installed on the core chuck, rider roll, rear drum, etc. that hold the child winding paper tube of the winder device measure vibrations at these positions to obtain vibration data. Frequency analysis is performed on the acquired vibration data in real time, resonance points of a plurality of periodic components including the natural frequency of the child winding are determined from the analysis results, and a resonance range is determined. That is, during operation of the winder device, vibrations caused by child winding are measured, and the vibration data is subjected to frequency analysis. Based on the analysis results, the common point of a plurality of periodic components including the natural frequency of the child winding is determined. Then, when these periodic components enter the resonance range, the speed is decelerated, and when they leave the resonance range, the speed is increased.

Another aspect of the present invention is a method for controlling the operation of the winder device described above, in which a plurality of periodic components including the natural frequency of the child winding enter a preset frequency range. It is possible to decelerate the speed and increase the speed when any one of the plurality of periodic components leaves the range.

For example, focusing on two periodic components, deceleration is performed when both of these two periodic components enter a preset frequency band range, and when one of the periodic components leaves the range, The speed is increased to perform steady operation.

Another aspect of the present invention is a method for controlling the operation of the winder device described above, wherein the difference between any two periodic components among the plurality of periodic components including the natural frequency of the child winding is within a predetermined range. When the vehicle enters the range, the vehicle is decelerated, and when the vehicle leaves the range, the speed is increased.

For example, frequency analysis is performed in real time on the vibration data acquired by the vibration sensor, and the difference between the natural frequency of the child winding obtained online and the rotational frequency of the child winding is determined by a preset difference. When the vehicle enters the range, the vehicle is decelerated, and when the vehicle leaves the range, the vehicle speed is increased. By making this set difference larger than the difference between the natural frequency and rotational frequency of these child winders in the resonance range, the winder device is decelerated before entering the resonance range and departs from the set difference. After that, you can increase the speed.

According to the operation control method for a winder device according to the present invention, the vibrations generated in the winder device are measured based on the fact that the vibrations generated in the winder device are caused by resonance between the natural frequency of winding and the natural frequency of each part of the winder device. Based on the vibration data obtained, frequency analysis is performed in real time, and the vibration generated in the winder device is suppressed by decelerating the winder device in the resonance range due to the periodic component derived from the natural frequency of winding. Eccentricity of winding and paper breakage can be prevented.

FIG. 2 is a diagram schematically showing a frequency analysis result when the winder speed is constant, for explaining the operation control method of the winder device according to the present invention. This is a diagram showing vibration trend data acquired by the vibration sensor installed in the winder device, where (A) is the vibration sensor installed on the rider roll, (B) is the vibration sensor installed on the core chuck, (C ) is a diagram of data acquired by a vibration sensor installed on the rear drum. FIG. 2 is a diagram illustrating the relationship between time and winder speed to explain an example of the operating state of the winder device according to the winder device operation control method according to the present invention, and an example of the conventional operation control mode is shown by a dashed-dotted line. 3 is a diagram illustrating a control mode according to the operation control method for a winder device according to the present invention, in which (A) shows the normal operation, and (B) shows the mode in which the difference between two periodic components is within a certain range; FIG. , (C) shows a mode in which two periodic components enter a certain range and overlap, and (D) shows a mode in which two periodic components depart from a certain range. 2 is a diagram showing the speed of the winder device, in which (A) shows the operation of the winder device from start to stop, and (B) shows an enlarged view of the vicinity of the resonance range. This is a diagram showing a simulation of the deceleration time with vibration displacement corresponding to Fig. 5, and shows vibration data obtained by a vibration sensor installed on the rider roll. (B) is an enlarged view corresponding to FIG. 5(B) from the start of operation to the stop of operation. FIG. 1 is a schematic side view of a winder device equipped with a device that implements the operation control method according to the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the operation control method of the winder apparatus based on this invention is demonstrated based on the preferable embodiment shown.

FIG. 7 is a diagram illustrating the general structure of a winder device equipped with a device that implements the operation control method according to the present invention. In the winder device 1, a winding produced by a paper machine is supported by an unwinder 1a as a master winding W. The paper sheet S is run while being unwound from this parent winding W, and is passed through a slitter knife 11 to produce child paper sheets Sn that are cut to a desired width. The manufactured child paper sheet Sn is wound around the front drum 12 via the tension roll 15. A rear drum 13 is supported adjacent to this front drum 12. A paper tube (not shown) whose axis is parallel to the axial direction of the front drum 12 and rear drum 13 is held by the core chuck 14. This paper tube is supported so as to be stretched over the upper portions of the front drum 12 and rear drum 13, and is in contact with the outer peripheral surfaces of the front drum 12 and rear drum 13. The child paper sheet Sn wound around the front drum 12 is wound around this paper tube, and the winding diameter gradually increases to produce a child winding U. Note that tension is applied to the child paper sheet Sn by the tension roll 15, and the child sheet Sn runs while being appropriately tensioned. Further, a rider roll 16 contacts and pressurizes the outer peripheral surface of the child winding U wound around the paper tube, and the winding strength is adjusted to be uniform.

Furthermore, a vibration sensor 13a, a vibration sensor 14a, and a vibration sensor 16a are installed in each of the rear drum 13, core chuck 14, and rider roll 16, and the vibrations generated in the rear drum 13, core chuck 14, and rider roll 16 are Vibration data has been obtained through measurement.
The vibration data acquired by these vibration sensors 13a, 14a, and 16a are sent to the frequency analyzer 20, and the frequency analyzer 20 performs frequency analysis on these vibration data to determine the natural frequency of the child winder U. The three derived periodic components are calculated.

The sampling interval for acquiring vibration data by the vibration sensors 13a, 14a, and 16a during operation of the winder device is preferably 10 ms, more preferably 5 ms, and even more preferably 1 ms. By shortening the sampling interval, frequency analysis can be performed in more detail, and a more accurate resonance range can be determined.

An operation control method according to the present invention for the winder device configured as described above will be described below.

FIG. 2 is a diagram relating to vibration trend data showing the vibration displacement and elapsed time measured by the vibration sensor 13a, vibration sensor 14a, and vibration sensor 16a installed in the winder device 1. Note that FIG. 2(A) shows data acquired by the vibration sensor 16a, FIG. 2(B) shows data acquired by the vibration sensor 14a, and FIG. 2(C) shows data acquired by the vibration sensor 13a. Further, FIG. 1 shows changes in natural frequencies obtained by performing frequency analysis using the frequency analyzer 20 on the vibration trend data shown in FIG. As shown by the broken line in FIG. 2, as the elapsed time ranges from 420 seconds to 480 seconds, resonance due to three periodic components derived from the natural frequency of the child winding U is centered around the winding diameter of approximately 860 mm. is occurring.

That is, as shown in FIG. 1, the rotation frequency of the child winding U and the rotation frequency of the rear drum 13 resonate in the resonance generating portion P when the natural frequency of the child winding U and the winder speed are constant. Therefore, as shown in FIG. 3, by reducing the processing speed before the operating state of the winder device 1 reaches the resonance generating portion P, the winder device 1 can be operated without generating strong vibrations. After the winding of the child paper sheet Sn progresses and passes through the region where resonance occurs (resonance range), the processing speed of the winder device 1 is increased and the operation is shifted to a steady state.

Then, vibration data is obtained in advance, and the resonance range of the periodic component of the resonance point obtained by frequency analysis of this vibration data is determined by the resonance time, which is the operating time of the winder device 1, and the range of the winding diameter of the child winder U. The resonance winding length is set as a range of a certain resonance winding diameter and winding length.
When the operating state of the winder device 1 enters a range where any one or more of the resonance ranges of the resonance time, resonance winding diameter, and resonance winding length overlap in combination, the processing speed is reduced. let After leaving this resonance range, the processing speed is increased. Note that the range in which the processing speed is reduced is before reaching the resonance generating part P.

Further, in FIG. 3, a diagram related to conventional operation control is also shown using a dashed line, and in the conventional operation control, after reaching the resonance generating part P, the operation is continued at a reduced processing speed. In this case, since the processing speed is reduced after reaching the resonance generating point P of the processing speed, vibrations are transmitted to the child winder U until the processing speed is reduced. For this reason, there is a risk that eccentricity or paper breakage of the child winder U may occur, which may impair the stability of productivity.

FIG. 4 is a diagram illustrating a case where operation control is performed focusing on two periodic components. During normal operation in which the winder device 1 can be operated without generating strong vibrations, that is, without entering the resonance range, the periodic component A and the periodic component B are in the resonance range C, as shown in FIG. 4(A). The winder device 1 can be operated at a steady speed without any trouble without entering the vehicle. Furthermore, when the periodic component A and the periodic component B enter the resonance range C, as shown in FIG. 4(B), the difference between the periodic component A and the periodic component B |AB| It is smaller than the difference F between the frequency bands of C. Furthermore, at frequencies where the periodic component A and the periodic component B match, the amplitude becomes large, as shown in FIG. 4(C). If the amplitude becomes large, there is a high possibility that resonance will already occur and eccentricity of the child winding U will occur.
Therefore, by reducing the processing speed at the time when the value AB of the difference |AB| of the periodic components A and B does not become smaller than the difference F between the frequency bands of the resonance range C, the occurrence of vibration can be avoided.

For this reason, a set value H that is larger than the frequency band difference F is set, and the periodic components A and B obtained by frequency analysis based on the vibration data measured by the vibration sensor 13a, vibration sensor 14a, and vibration sensor 16a. When the value AB of the difference |AB| becomes smaller than the set value H, the processing speed is reduced. This allows vibration to be minimized. Then, when the value AB of the difference |AB| between the periodic components A and B becomes larger than the set value H, the processing speed can be increased.

FIG. 5 shows the change over time in the processing speed (winder speed) of the winder device 1, with FIG. 5(A) showing the period from the start to the end of operation, and FIG. The neighborhood is shown enlarged. In FIG. 5, the case where the operation is performed without reducing the processing speed (blank) is shown by a solid line, and the case where the set value H of the difference between periodic component A and periodic component B is 1.4 Hz is shown by a dashed line. A case where the set value H of the difference between component A and periodic component B is 2 Hz is shown by a broken line.
That is, when the set value H is 2 Hz, the winder device 1 decelerates after approximately 320 seconds have elapsed from the start of operation, and increases the speed after approximately 420 seconds have elapsed. For this reason, the engine is operated at a reduced speed for about 100 seconds. Further, when the set value H is 1.4 Hz, the speed is decelerated after about 330 seconds, and the speed is increased after about 390 seconds, so that the operation is performed while decelerating for about 60 seconds.

FIG. 6 shows how large the set value H is required when operating at the processing speed shown in FIG. 5, based on the vibration displacement acquired by the vibration sensor 16a installed on the rider roll 16. It is a figure of the result of simulating. In FIG. 6, symbol L indicates the case where the processing speed is not reduced, symbol M indicates the case where the set value H is 1.4 Hz, and symbol N indicates the case where the set value H is 2 Hz. That is, the symbol L indicates the displacement of the vibration that was actually obtained, and the symbols M and N indicate the simulation results. Approximately 50% of vibrations were suppressed when operated at the processing speed after deceleration shown in Figure 5. Therefore, in the simulation, it was assumed that vibrations could be suppressed by 50% when operated at the processing speeds shown in Figure 5. The vibration displacement shown in Figure 6 was determined.
Also, FIG. 6(A) corresponds to FIG. 5(A) and shows the period from the start to the end of operation, and FIG. 6(B) corresponds to FIG. 5(B) and shows the vicinity of the resonance range C. Shown enlarged.

In FIG. 6, as indicated by the symbol N, when the set value H is 2 Hz, the vibration displacement becomes the smallest, and the occurrence of resonance is suppressed.
This is considered to be because the vibration of the rider roll 16 enters the resonance range C when the set value H is set to 1.4 Hz. Therefore, when the set value H is set to 2 Hz, the occurrence of vibration can be suppressed more reliably.
On the other hand, as described above, if the set value H is set to a large value, the deceleration operation time of the winder device 1 becomes longer, resulting in a decrease in production efficiency. Therefore, the set value H is set in consideration of securing production efficiency and suppressing vibrations generated by resonance. In addition, if it is possible to increase the processing speed before and after the set value H, especially if it is possible to increase the processing speed after leaving the set value H, it is possible to avoid the resonance range C by increasing the speed. deceleration time can be offset.

Furthermore, when both the periodic component A and the periodic component B enter the range of the set value H, the processing speed may be reduced. In this case, even if the value AB of the difference between periodic component A and periodic component B enters within the range of set value H, one of periodic component A and periodic component B is outside the range of set value H. In this case, the operation of the winder device 1 is continued without reducing the processing speed. On the other hand, when both periodic component A and periodic component B enter the range of set value H, the processing speed is reduced. Then, if one of the periodic components deviates from the range of the set value H, the processing speed is increased.
That is, when any of the plurality of periodic components A and B including the natural frequency of the child winding enters the range of the set value H, the processing speed is reduced.

The winder speed of the winder device 1 operated by the operation control method described above is preferably 1000 m/min or more, more preferably 1500 m/min or more, and even more preferably 2000 m/min. That is, the higher the winder speed, the greater the vibration due to resonance, and the more effectively the above-described operation control method functions.

Further, the static friction coefficient of the paper wound up by the winder device 1 is preferably 0.4 or more, more preferably 0.5 or more, and even more preferably 0.6 or more. The larger the coefficient of static friction of paper, the larger the vibration due to resonance, and the more effectively the above-described operation control method functions.

Furthermore, the type of winder device 1 is not particularly limited. However, in this invention, the two-drum winder is prone to vibrations due to slippage between the drum and the winder, which is caused by the fact that the paper thickness is not uniform in the width direction and the number of rotations for each child winder varies. The operation control method described above works effectively.

As explained above, in the operation control method according to the present invention, the winder device By operating at a reduced speed and preventing the occurrence of resonance, online control is possible. Therefore, regardless of the type of paper supplied to the winder device, it is possible to quickly respond and suppress eccentricity of winding and paper breakage.

1 Winder device 1a Unwinder 11 Slitter knife 12 Front drum 13 Rear drum 13a Vibration sensor 14 Core chuck 14a Vibration sensor 15 Tension roll 16 Rider roll 16a Vibration sensor 20 Frequency analyzer A Periodic component B Periodic component C Resonance range P Resonance generating section S Paper Sheet Sn Child paper sheet U Child winding W Main winding

Claims (3)

In an operation control method of a winder device that forms a small width and small diameter child winding from a winding of paper,
After acquiring vibration data by a vibration sensor installed at an appropriate position of the winder device, frequency analysis is immediately performed,
checking resonance points of a plurality of periodic components including the natural frequency of the child winding, and determining a resonance range where the plurality of periodic components resonate and vibration increases;
When one or more of the resonance time, the resonance winding diameter of the child winding, and the resonance winding length, which are the resonance range, are included in the resonance range, the processing speed of the winder device is reduced and the resonance A method for controlling the operation of a winder device, characterized in that the winder device is raised when the device leaves the range. An operation control method for a winder device according to claim 1 , comprising:
When a plurality of periodic components including the natural frequency of the child winding enter a preset frequency band range, the processing speed of the winder device is reduced, and any one of the plurality of periodic components moves from within the range. A method for controlling the operation of a winder device, characterized in that the processing speed of the winder device is increased when the winder device is detached from the winder device. An operation control method for a winder device according to claim 1 , comprising:
When the difference between any two periodic components among the plurality of periodic components including the natural frequency of the child winding enters within a predetermined range , the processing speed of the winder device is slowed down and the process speed is removed from the range. A method for controlling the operation of a winder device, comprising increasing the processing speed of the winder device .

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